bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigating cellular and molecular mechanisms of neurogenesis in Capitella teleta sheds light on the ancestor of Annelida
Authors: Sur A. , Renfro A. , Bergmann P. J. , Meyer N. P.
Published: July 2020

Background

Diverse architectures of nervous systems (NSs) such as a plexus in cnidarians or a more centralized nervous system (CNS) in insects and vertebrates are present across Metazoa, but it is unclear what selection pressures drove evolution and diversification of NSs. One underlying aspect of this diversity lies in the cellular and molecular mechanisms driving neurogenesis, i.e. generation of neurons from neural precursor cells (NPCs). In cnidarians, vertebrates, and arthropods, homologs of SoxB and bHLH proneural genes control different steps of neurogenesis, suggesting that some neurogenic mechanisms may be conserved. However, data are lacking for spiralian taxa.

Results

To that end, we characterized NPCs and their daughters at different stages of neurogenesis in the spiralian annelidCapitella teleta. We assessed cellular division patterns in the neuroectoderm using static and pulse-chase labeling with thymidine analogs (EdU and BrdU), which enabled identification of NPCs that underwent multiple rounds of division. Actively-dividing brain NPCs were found to be apically-localized, whereas actively-dividing NPCs for the ventral nerve cord (VNC) were found apically, basally, and closer to the ventral midline. We used lineage tracing to characterize the changing boundary of the trunk neuroectoderm. Finally, to start to generate a genetic hierarchy, we performed double-fluorescent in-situ hybridization (FISH) and single-FISH plus EdU labeling for neurogenic gene homologs. In the brain and VNC,Ct-soxB1andCt-neurogeninwere expressed in a large proportion of apically-localized, EdU+NPCs. In contrast,Ct-ash1was expressed in a small subset of apically-localized, EdU+NPCs and subsurface, EdU−cells, but not inCt-neuroD+orCt-elav1+cells, which also were subsurface.

Conclusions

Our data suggest a putative genetic hierarchy withCt-soxB1andCt-neurogeninat the top, followed byCt-ash1, thenCt-neuroD, and finallyCt-elav1. Comparison of our data with that fromPlatynereis dumeriliirevealed expression ofneurogeninhomologs in proliferating NPCs in annelids, which appears different than the expression of vertebrateneurogeninhomologs in cells that are exiting the cell cycle. Furthermore, differences between neurogenesis in the head versus trunk ofC. teletasuggest that these two tissues may be independent developmental modules, possibly with differing evolutionary trajectories.
Clinical picture, management and risk stratification in patients with cardiogenic shock: does gender matter?
Authors: Collado-Lledó Elena , Llaó Isaac , Rivas-Lasarte Mercedes , González-Fernández Victor , Noriega Francisco J. , Hernández-Perez Francisco José , Alegre Oriol , Sionis Alessandro , Lidón Rosa M. , Viana-Tejedor Ana , Segovia-Cubero Javier , Ariza-Solé Albert
Published: July 2020

Background

Early recognition and risk stratification are crucial in cardiogenic shock (CS). A lower adherence to recommendations has been described in women with cardiovascular diseases. Little information exists about disparities in clinical picture, management and performance of risk stratification tools according to gender in patients with CS.

Methods

Data from the multicenter Red-Shock registry were used. All consecutive patients with CS were included. Both CardShock and IABP-SHOCK II risk scores were calculated. The primary end-point was in-hospital mortality. The discriminative ability of both scores according to gender was assessed by binary logistic regression, calculatingReceiver operating characteristic(ROC) curves and the corresponding area under the curve (AUC).

Results

A total of 793 patients were included, of whom 222 (28%) were female. Women were significantly older and had a lower proportion of chronic obstructive pulmonary disease and prior myocardial infarction. CS was less often related to acute coronary syndromes (ACS) in women. The use of vasoactive drugs, renal replacement therapy, invasive ventilation, therapeutic hypothermia and mechanical circulatory support was similar between both groups. In-hospital mortality was 346/793 (43.6%). Mortality was not significantly different according to gender (p = 0.194).

Cardshock risk score showed a good ability for predicting in-hospital mortality both in man (AUC 0.69) and women (AUC 0.735). Likewise, the IABP-II successfully predicted in-hospital mortality in both groups (man: AUC 0.693; women: AUC 0.722).

Conclusions

No significant differences were observed regarding management and in-hospital mortality according to gender. Both the CardShock and IABP-II risk scores depicted a good ability for predicting mortality also in women with CS.
Role of peroxisome proliferators-activated receptor-gamma in advanced glycation end product-mediated functional loss of voltage-gated potassium channel in rat coronary arteries
Authors: Gao Side , Hua Bing , Liu Qingbo , Liu Huirong , Li Weiping , Li Hongwei
Published: July 2020

Background

High blood glucose impairs voltage-gated K+ (Kv) channel-mediated vasodilation in rat coronary artery smooth muscle cells (CSMCs) via oxidative stress. Advanced glycation end product (AGE) and receptor for AGE (RAGE) axis has been found to impair coronary dilation by reducing Kv channel activity in diabetic rat small coronary arteries (RSCAs). However, its underlying mechanism remain unclear. Here, we used isolated arteries and primary CSMCs to investigate the effect of AGE incubation on Kv channel-mediated coronary dilation and the possible involvement of peroxisome proliferators-activated receptor (PPAR) -γ pathway.

Methods

The RSCAs and primary CSMCs were isolated, cultured, and treated with bovine serum albumin (BSA), AGE-BSA, alagrebrium (ALA, AGE cross-linking breaker), pioglitazone (PIO, PPAR-γ activator) and/or GW9662 (PPAR-γ inhibitor). The groups were accordingly divided as control, BSA, AGE, AGE + ALA, AGE + PIO, or AGE + PIO + GW9662. Kv channel-mediated dilation was analyzed using wire myograph. Histology and immunohistochemistry of RSCAs were performed. Western blot was used to detect the protein expression of RAGE, major Kv channel subunits expressed in CSMCs (Kv1.2 and Kv1.5), PPAR-γ, and nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-2 (NOX-2).

Results

AGE markedly reduced Forskolin-induced Kv channel-mediated dilation of RSCAs by engaging with RAGE, and ALA or PIO significantly reversed the functional loss of Kv channel. In both RSCAs and CSMCs, AGE reduced Kv1.2/1.5 expression, increased RAGE and NOX-2 expression, and inhibited PPAR-γ expression, while ALA or PIO treatment partially reversed the inhibiting effects of AGE on Kv1.2/1.5 expression, accompanied by the downregulation of RAGE and decreased oxidative stress. Meanwhile, silencing of RAGE with siRNA remarkably alleviated the AGE-induced downregulation of Kv1.2/1.5 expression in CSMCs.

Conclusion

AGE reduces the Kv channel expression in CSMCs and further impairs the Kv channel-mediated dilation in RSCAs. The AGE/RAGE axis may enhance oxidative stress by inhibiting the downstream PPAR-γ pathway, thus playing a critical role in the dysfunction of Kv channels.
Paediatric contacts with the UK out-of-hours primary care service and contact outcomes: a regional service evaluation
Authors: Edwards George , Brettell Rachel , Bird Chris , Hunt Helen , Lasserson Dan , Hayward Gail
Published: July 2020

Background

Demand on hospital emergency departments for paediatric problems is increasing. However, the volume and nature of paediatric health demands placed on other parts of the urgent care system have not been explored. This understanding is an important first step in developing and improving out-of-hospital care. We aimed to describe the volume, nature, and outcomes of paediatric contacts with out-of-hours general practice (OOH GP). We performed a retrospective service evaluation using data from 12 months of paediatric patient contacts with the Oxfordshire OOH GP service.

Methods

A database of contacts with the Oxfordshire OOH GP service was created for a 12 month period from December 2014 to November 2015. Descriptive statistics were calculated using SPSS Version 25.

Results

27,455 contacts were made by 18,987 individuals during a 12 month period. The majority of these were for children aged under 5. Over 70% of contacts were at the weekend. The peak contact period was between 18:30 and 21:30. Over 40% of contacts resulted in advice only (no onward referral, requirement for GP follow up, or prescription). 19.7% of contacts resulted in an antibiotic prescription, most commonly those linked with ear, chest, and throat infections.

Discussion

Paediatric contacts with the Oxfordshire OOH GP service were predominantly in younger age groups and in the evening, with 19.7% resulting in an antibiotic prescription. Almost half of the contacts had no follow up or prescription, suggesting non-prescribing health care professionals could be involved in providing care in OOH GP. Further research should consider how children and their parents can be best supported to optimise OOH consulting.
Factors affecting uptake and completion of isoniazid preventive therapy among HIV-infected children at a national referral hospital, Kenya: a mixed quantitative and qualitative study
Authors: Ngugi Serah Kajuju , Muiruri Peter , Odero Theresa , Gachuno Onesmus
Published: July 2020

Background

Tuberculosis (TB) is the most common opportunistic infection and the leading cause of death in people living with HIV (PLHIV). HIV-infected children are at a higher risk of TB infection and disease compared to those without HIV. Isoniazid preventive therapy (IPT) is an effective intervention in preventing progression of latent TB infection to active TB. The World Health Organization (WHO) currently recommends that all children aged > 12 months and adults living with HIV in whom active TB has been excluded should receive a 6-months course of IPT as part of a comprehensive package of HIV care. Despite this recommendation, the uptake of IPT among PLHIV has been suboptimal globally. This study sought to determine the factors affecting IPT uptake and completion among HIV-infected children in a large HIV care centre in Nairobi, Kenya.

Method

This was a cross-sectional mixed methods study comprising of quantitative and qualitative study designs. Medical records of 225 HIV-infected children aged 1 to < 10 years, in care in the Kenyatta National Hospital Comprehensive Care Centre (KNH CCC) were retrospectively reviewed, and 8 purposively selected healthcare providers and 18 consecutively selected caregivers of children were interviewed.

Results

IPT uptake among CLHIV in care in the KNH CCC was 68% (152/225) while the treatment completion rate was 82% (94/115). IPT-related health education and counselling were the main facilitators of IPT uptake and completion, while fear of adverse drug reaction, pill burden and lack of an integrated monitoring and evaluation system for IPT were the major barriers.

Conclusion

The IPT uptake in this study was low and fell short of the set global target of > 90%. The completion rate was however acceptable. There is an urgent need to address the identified barriers.
Roles of contrast-enhanced ultrasonography in identifying volume change of benign thyroid nodule and optical time of secondary radiofrequency ablation
Authors: Jiao Ziyu , Luo Yukun , Song Qing , Yan Lin , Zhu Yaqiong , Xie Fang
Published: July 2020

Background

Ultrasonography-guided radiofrequency ablation (RFA) was was proved to be an effective and safe treatment with few complications for benign thyroid nodule. In cases of incompletely treated nodule margin, secondary RFAs are necessary. The present study was designed to analyze the dynamic change of nodular volume of benign thyroid tumors accessed using contrast-enhanced ultrasonography (CEUS) after RFA, and hopefully to offer evidence for time decision of secondary RFA.

Methods

A total of 105 patients who received ultrasonography-guided RFA in the Department of Ultrasound, Chinese PLA General Hospital between April 2014 and August 2018 for benign thyroid nodule were enrolled in this retrospective study. Vt increase (regrowth) and vital volume (Vv) of thyroid nodule were followed up at 0, 1, 3, 6, 12, 24 and 36 months after RFA.

Results

A total of 105 nodules of 105 patients were enrolled in the present study, with a mean age of 46.70 ± 13.05 years, and 87 of them (82.9%) were female. The median follow up time was 25.1 months (12 months to 36 months). During the follow up, regrowth occurred in 43 cases, 95.35% of nodular regrowth occurred in 12 months after RFA, and the rate showed substantial consistency with that on the 36th month postoperatively (Kappa = 0.656).

Conclusions

CEUS was an effective and safe tool to monitor volume change of benign thyroid nodules after RFA. The majority cases of regrowth occurred in 12 months after RFA, thus, the 12th month after RFA might be the optimal time for volume assessment to make the decision of secondary RFAs.
Renal arteriography with endovascular ultrasound for the management of renal infarction patients
Authors: Ivanes Fabrice , Dewaele Jean , Touboul Caroline , Gatault Philippe , Sautenet Bénédicte , Barbet Christelle , Büchler Matthias , Quilliet Laurent , Angoulvant Denis , Halimi Jean-Michel
Published: July 2020

Background

Renal infarction (RI) is a rare disease with poor prognosis. Appropriate secondary prevention treatment is essential and requires an exhaustive etiological assessment. We aimed to determine whether invasive endovascular explorations may improve the diagnostic process and change the secondary prevention treatment strategy in RI patients.

Methods

We report a retrospective observational study of 25 RI patients referred to Tours University Hospital between 2011 and 2018 for etiological investigation including renal arteriography and intravascular ultrasonography (IVUS). We sought for antithrombotic treatment regimen, vital status, bleeding and ischemic outcomes during the median follow-up of 59 months.

Results

Invasive explorations showed local arterial disease in 14 patients (56%). This led to a diagnosis or change in diagnosis in 9 patients (36%) and to a change in antithrombotic strategy in 56% of cases, with an increased prescription of antiplatelet therapy. No patient died, only two patients (8%) had persistent mild renal insufficiency. One IVUS complication was reported and treated without any significant long-term consequences.

Conclusion

Invasive endovascular investigations of RI may modify the secondary prevention treatment through a better assessment of the aetiology of RI. Multicentric randomized studies are necessary to advocate the hypothesis that invasive exploration of renal artery can improve long-term prognosis.
HIV-associated neurocognitive disorders at Moi teaching and referral hospital, Eldoret, Kenya
Authors: Mohamed Amina Ali , Oduor Chrispine , Kinyanjui Daniel
Published: July 2020

Background

Human Immunodeficiency Virus (HIV) infection causes a myriad of neurological complications including cognitive deficits referred to as HIV-Associated Neurocognitive Disorders (HAND). With the introduction of combination antiretroviral therapy, there has been an epidemiological shift in cognitive disorders with a decline in the more severe HIV-Associated Dementia (HAD) to an increase in the less severe HAND: Asymptomatic Neurocognitive Impairment (ANI) and HIV-associated Mild Neurocognitive Disorder (MND). Central Nervous System (CNS) involvement in HIV interferes with cognitively demanding activities of daily living and hence a worse quality of life. Early diagnosis is delayed until symptoms are overt.

Methods

We conducted a cross sectional analytical study of HIV infected persons on antiretroviral therapy attending HIV clinic. A systematic random sampling was done to select 360 patients. An interviewer administered structured questionnaire was used to collect socio-demographic data while the CD4 count and viral load were retrieved from the Academic Model Providing Access to Healthcare (AMPATH) database. Pearson’s Chi Square test was used to compare proportions while independent sample t- test was used to compare continuous variables between the patients diagnosed with HAND and those without HAND. Logistic regression model was used to assess the factors associated with HAND.

Results

The mean age of the study participants was 40.2 years. The overall prevalence of HAND was (81.1%) N = 292. Mild HAND (ANI and MND) was present (78.6%) N = 283, Severe HAND (HAD) (2.5%) N = 9. The factors associated with HAND were older age OR: 1.06 (95% CI: 1.03, 1.10), male gender OR: 0.48 (95% CI: 0.24, 0.97), Advanced WHO clinical staging OR: 2.45 (95% CI: 1.20, 5.01) and a higher level of education; secondary/tertiary OR: 0.16 (95% CI: 0.07, 0.38); 0.11 (95% CI: 0.04, 0.35).

Conclusion

The prevalence of HAND in this study population was found to be high (81.1%). Older age and advanced WHO clinical staging were associated with an increased risk of hand while higher level of education and male gender were protective.
Health information and health-seeking behaviour in Yemen: perspectives of health leaders, midwives and mothers in two rural areas of Yemen
Authors: Hyzam Dalia , Zou Mingyang , Boah Michael , Saeed Abeer , Li Chenrui , Pan Shixu , Zhai Jinhe , Wu Li-Jie
Published: July 2020

Background

Humanitarian crises can lead to the rapid change in the health needs of women and newborns, which may give rise to a complex situation that would require various interventions as solutions. This study aimed to examine the health education and promotion patterns, health-seeking behaviour of mothers, and barriers to the use of maternal health services from public health facilities in two rural areas of Yemen.

Methods

We used a qualitative approach. We conducted in-depth interviews and focus group discussions with frontline health professionals and mothers respectively. Nine in-depth interviews were conducted with the health professionals, including 4 health leaders and 5 midwives, and 2 focus group discussions with mothers aged 18–45 years in Abyan and Lahj. Thematic analysis approach was used to analyze the data in Atlas.ti (version 8) Software.

Results

Our data showed that health education and promotion activities on maternal health were ad hoc and coverage was poor. Maternal health services were underutilized by women. According to the data from the focus group discussions, the poor quality of services, as indicated by inadequate numbers of female doctors, lack of medical equipment and medicines, and costs of services were barriers to use maternal health services. Moreover, the use of prenatal and postnatal care services was associated with women’s’ perceived need. However, according to the health professionals, the inadequate human resource, workload, and inadequate funding from government have contributed significantly to the perceived quality of maternal health services provided by public health facilities. Despite the identified barriers, we found that a safe motherhood voucher scheme was instituted in Lahj which facilitated the use of maternal health services by disadvantaged women by removing financial barriers associated with the use of maternal health services.

Conclusion

This study identified several obstacles, which worked independently or jointly to minimize the delivery and use of health services by rural women. These included, inadequate funding, inadequate human resources, poor quality of health services, and high cost of services. These barriers need to be addressed to improve the use of reproductive health services in Yemen.
Exercise as a diagnostic and therapeutic tool for preventing cardiovascular morbidity in breast cancer patients– the BReast cancer EXercise InTervention (BREXIT) trial protocol
Authors: Foulkes Stephen J. , Howden Erin J. , Antill Yoland , Loi Sherene , Salim Agus , Haykowsky Mark J. , Daly Robin M. , Fraser Steve F. , La Gerche Andre
Published: July 2020

Background

Anthracycline chemotherapy (AC) is an efficacious (neo) adjuvant treatment for early-stage breast cancer (BCa), but is associated with an increased risk of cardiac dysfunction and functional disability. Observations suggest that regular exercise may be a useful therapy for the prevention of cardiovascular morbidity but it is yet to be interrogated in a large randomised trial.

The primary aims of this study are to: 1) determine if 12-months of ET commenced at the onset of AC can reduce the proportion of BCa patients with functional disability (peak VO2, < 18 ml/kg/min), and 2) compare current standard-of-care for detecting cardiac dysfunction (resting left-ventricular ejection fraction assessed from 3-dimensional echocardiography) to measures of cardiac reserve (peak exercise cardiac output assessed from exercise cardiac magnetic resonance imaging) for predicting the development of functional disability 12-months following AC. Secondary aims are to assess the effects of ET on VO2peak, left ventricular morphology, vascular stiffness, cardiac biomarkers, body composition, bone mineral density, muscle strength, physical function, habitual physical activity, cognitive function, and multidimensional quality of life.

Methods

One hundred women with early-stage BCa (40–75 years) scheduled for AC will be randomized to 12-months of structured exercise training (n = 50) or a usual care control group (n = 50). Participants will be assessed at baseline, 4-weeks following completion of AC (4-months) and at 12-months for all measures.

Discussion

Women diagnosed with early-stage BCa have increased cardiac mortality. More sensitive strategies for diagnosing and preventing AC-induced cardiovascular impairment are critical for reducing cardiovascular morbidity and improving long-term health outcomes in BCa survivors.

Trial registration

Australia & New Zealand Clinical Trials Registry (ANZCTR), ID: 12617001408370. Registered on 5th of October 2017.
Correlation between immune-related adverse events and prognosis in patients with various cancers treated with anti PD-1 antibody
Authors: Matsuoka Hiroshi , Hayashi Takahiro , Takigami Karen , Imaizumi Kazuyoshi , Shiroki Ryoichi , Ohmiya Naoki , Sugiura Kazumitsu , Kawada Kenji , Sawaki Akira , Maeda Koutaro , Ando Yousuke , Uyama Ichiro
Published: July 2020

Background

Immune checkpoint inhibitors (ICIs) targeting programmed cell death protein 1 (PD-1) are used for the treatment of various cancer types. However, immune-related adverse events (irAEs) occur in patients treated with ICIs. Several small-scale studies have reported the onset of irAEs and therapeutic effects of ICIs. Here we report a large-scale retrospective study covering a wide range of cancers. We evaluated irAEs and the therapeutic effects of ICIs and determined whether irAEs could be predicted.

Methods

This study included patients treated with the anti-PD-1 antibodies nivolumab or pembrolizumab at Fujita Health University Hospital between December 2015 and March 2019. We retrospectively reviewed the electronic medical records for age, cancer type, pre-treatment blood test data, presence or absence of irAE onset, type and severity of irAEs, outcome of irAE treatment, response rate, progression-free survival and overall survival.

Results

Two hundred-eighty patients received ICIs. The overall incidence of irAEs was 41.1% (115 patients), and the incidence of severe irAEs of grade 3 and higher was 2.8% (eight patients). The most common irAEs were skin disorders, thyroid disorders and interstitial pneumonitis. Patients with irAEs were significantly older than those without irAEs (69.7 versus 66.0 years, P = 0.02). The objective response rate (ORR) in patients with irAEs was 30.4%, which was significantly higher than in patients without irAEs (12.7%; P < 0.01). Both the median overall and progression-free survival were significantly longer in patients with irAEs (P < 0.01, p < 0.01). Based on the blood test data obtained before ICI therapy, hypothyroidism, thyroid-stimulating hormone levels and thyroglobulin antibody levels were associated with the onset of irAEs. In many patients with irAEs of Common Terminology Criteria for Adverse Events Grade 3 or higher, re-administration of ICIs was difficult, and their outcomes were poor. In contrast, many patients with irAEs of a lower grade were able to resume ICI therapy.

Conclusion

Although the onset of irAEs was difficult to be predicted based on pre-treatment tests. It appeared that the continuation of ICI therapy, along with early detection and adequate control of irAEs, might contribute to the improved prognosis of patients.
Slanted bilateral lateral rectus recession for convergence insufficiency-type intermittent exotropia: a retrospective study
Authors: Ren Meiyu , Wang Qi , Wang Lihua
Published: July 2020

Background

The present study sought to investigate the efficiency and safety of slanted bilateral lateral rectus recession for the treatment of convergence insufficiency-type intermittent exotropia.

Methods

This retrospective study included 34 patients who underwent slanted bilateral lateral rectus recession for convergence insufficiency-type intermittent exotropia in Shandong Provincial Hospital affiliated to Shandong First Medical University between September 2013 and October 2015 with a minimum follow-up of 6 months. A successful surgical alignment was defined as + 5 (positive for esotropia) to − 10 (negative for exotropia) prism diopters (PD) of orthotropia in the primary position while viewing distant or near targets and a near-distance deviation difference ≤ 8PD.

Results

The mean age of the patients at surgery was 7.09 ± 3.80 years (range, 3 to 18 years). The mean distance deviations were − 26.09 ± 6.5 PD (range, − 15 to − 35 PD) and the mean near deviations, − 37.21 ± 6.3 PD (range, − 25 to − 45 PD) preoperatively. The mean recession amount of upper pole of the lateral rectus was 5.97 mm (range, 4.0 to 7.5 mm) and that of lower pole of the lateral rectus, 7.49 mm (range, 6.0 to 8.5 mm). At a mean follow-up of 15.0 months (range, 6 to 37 months), the surgical success rate was 70.6% (24/34), the under-correction rate was 17.6% (6/34), and the overcorrection rate was 11.8% (4/34). The mean near-distance deviation difference was significantly reduced from 11.12 ± 2.06 PD (range, 10 to 15 PD) preoperatively to 2.47 ± 3.04 PD (range, 0 to 10 PD) postoperatively (P < 0.001). Each millimeter of difference between the upper and lower poles of the lateral rectus recession was associated with an improvement of 5.65 PD in the near-distance deviation difference. At the final follow up, a near-distance deviation difference of ≤8PD was found in 32 (94.1%) patients. None of the patients developed A-V pattern, torsional diplopia, or restricted abduction of the eyes.

Conclusions

Slanted bilateral lateral rectus recession may successfully reduce the distance and near exodeviations and the near-distance deviation difference, thus was proved to be an effective and safe procedure for the treatment of convergence insufficiency-type intermittent exotropia.
FEEding DURing red cell transfusion (FEEDUR RCT): a multi-arm randomised controlled trial
Authors: Schindler Tim , Yeo Kee Thai , Bolisetty Srinivas , Michalowski Joanna , Tan Alvin Hock Kuan , Lui Kei
Published: July 2020

Background

Necrotising Enterocolitis (NEC) is a devastating neonatal disease. A temporal association between red cell transfusion and NEC has been recognized and there have been concerns about the effects of feeding during transfusion. We aimed to assess the effect of different enteral feeding regimens on splanchnic oxygenation in preterm infants receiving red cell transfusions.

Methods

This was an open, multi-arm, parallel-group, randomised controlled trial conducted in a single centre in Australia. We compared three different enteral feeding regimes during a single red cell transfusion in preterm infants < 35 weeks gestational age at birth. Infants were randomised to either: (1) Withholding enteral feeds for 12 h from the start of transfusion or; (2) Continuing enteral feeds or; (3) Restriction of enteral feed volume to 120 ml/kg/day (maximum 20 kcal/30 ml) for 12 h. The primary outcome was mean splanchnic-cerebral oxygenation ratio (SCOR) and mean splanchnic fractional oxygen extraction (FOE) before (1 h prior), during (1 h into transfusion) and after (end of transfusion; 12 and 24 h post) transfusion.

Results

There were 60 transfusion episodes (20 transfusion episodes in each group) included in the analysis. 41 infants with a median gestational age at birth of 27 weeks (range 23–32 weeks) were enrolled. The median postnatal age was 43 days (range 19–94 days) and the median pre-transfusion haematocrit was 0.27 (range 0.22–0.32). All three groups were similar at baseline. There were no differences in mean SCOR and mean splanchnic FOE at any of the pre-specified time points. There were also no differences in clinical outcomes. There were no episodes of NEC in any infant. Across all groups the mean SCOR increased from the start to the end of each transfusion (0.97 [CI95% 0.96–0.98] vs 1.00 [CI95% 0.99–1.01]; p = 0.04) and the mean FOE decreased from the start to the end of each transfusion (0.22 [CI95% 0.21–0.23] vs 0.17 [CI95% 0.16–0.18]; p < 0.001).

Conclusions

There were no differences in splanchnic oxygenation when enteral feeds were either withheld, continued or restricted during a transfusion. However, the successful conduct of this study supports the feasibility of a large trial powered to assess clinical outcomes.

Trial registration

ANZCTR, ACTRN12616000160437. Registered 10 February 2016, https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=370069
Patient and befriender experiences of participating in a befriending programme for adults with psychosis: a qualitative study
Authors: Burn Erin , Chevalier Agnes , Leverton Monica , Priebe Stefan
Published: July 2020

Background

Befriending is a popular form of volunteering in healthcare, and research suggests that it can be beneficial for people with mental illness. This study aimed to explore the experiences of a large sample of volunteer befrienders and patients who participated in the VOLUME trial, testing the efficacy of a structured befriending programme for individuals with psychosis. This is the first study to explore the specific challenges and benefits of befriending in both volunteers and patients in this population within the same programme.

Methods

A series of in-depth semi-structured interviews were conducted with 34 volunteer befrienders and 28 participating patients. All participants who had taken part in at least one befriending session were invited to be interviewed about their experiences with the aim of including a wide range of views, including those who were more or less engaged with the befriending programme. The data were analysed using Thematic Analysis.

Results

Four broad themes were developed from the analysis of the befriender and patient interviews which, although were largely discrete, captured the overall experiences of participating in the befriending programme: 1) Bridging the gap, 2) A genuine relationship that developed over time, 3) A big commitment, and 4) A flexible approach.

Conclusions

These results further support that, befriending programmes for individuals with psychosis can be a worthwhile experience for both befrienders and patients. However, participation also requires perseverance and flexibility from both sides. Different factors, such as incorporating participant preferences for frequency of meetings, have to be considered in the development and management of a befriending programme in order to provide effective support to both befrienders and patients.
African-led health research and capacity building- is it working?
Authors: Kasprowicz Victoria O. , Chopera Denis , Waddilove Kim Darley , Brockman Mark A. , Gilmour Jill , Hunter Eric , Kilembe William , Karita Etienne , Gaseitsiwe Simani , Sanders Eduard J. , Ndung’u Thumbi
Published: July 2020

Background

Africa bears a disproportionately high burden of globally significant disease but has lagged in knowledge production to address its health challenges. In this contribution, we discuss the challenges and approaches to health research capacity strengthening in sub-Saharan Africa and propose that the recent shift to an African-led approach is the most optimal.

Methods and findings

We introduce several capacity building approaches and recent achievements, explore why African-led research on the continent is a potentially paradigm-shifting and innovative approach, and discuss the advantages and challenges thereof. We reflect on the approaches used by the African Academy of Sciences (AAS)-funded Sub-Saharan African Network for TB/HIV Research Excellence (SANTHE) consortium as an example of an effective African-led science and capacity building programme. We recommend the following as crucial components of future efforts: 1. Directly empowering African-based researchers, 2. Offering quality training and career development opportunities to large numbers of junior African scientists and support staff, and 3. Effective information exchange and collaboration. Furthermore, we argue that long-term investment from international donors and increasing funding commitments from African governments and philanthropies will be needed to realise a critical mass of local capacity and to create and sustain world-class research hubs that will be conducive to address Africa’s intractable health challenges.

Conclusions

Our experiences so far suggest that African-led research has the potential to overcome the vicious cycle of brain-drain and may ultimately lead to improvement of health and science-led economic transformation of Africa into a prosperous continent.
Every medicine is medicine; exploring inappropriate antibiotic use at the community level in rural Ghana
Authors: Afari-Asiedu Samuel , Hulscher Marlies , Abdulai Martha Ali , Boamah-Kaali Ellen , Asante Kwaku Poku , Wertheim Heiman F. L.
Published: July 2020

Background

Inappropriate antibiotic use is an important driver of antibiotic resistance. This study sought to explore inappropriate antibiotic use and confusing antibiotics with other medicines in Ghana using ethnomethodology research approach.

Methods

This was an explorative study involving 15 in-depth interviews among health professionals and private dispensers and eight focus group discussions among 55 community members. Qualitative data were coded using Nvivo 12, thematically analysed and presented as narratives with quotes to support the findings.

Results

Self-medication was common and antibiotics were used to treat specific diseases but respondents were not aware these were ‘antibiotics’. Various antibiotics were used for indications that in principle do not require systemic antibiotics, like stomach ache and sores on the body. Antibiotics, in particular tetracycline and metronidazole, were poured into “akpeteshie” (local gin) to treat hernia and perceived stomach sores (stomach ulcer). These practices were copied/learnt from various sources like over-the-counter medicine sellers, family, friends, radio/television, drug peddlers, pharmacies and doctors. Medicines in capsules were referred to as ‘topaye’ or ‘abombelt’ in Twi (local dialect) and perceived to treat pain associated with diseases. Antibiotics in capsules were described with colours which appeared confusing as some capsules with different drugs in them have similar colours.

Conclusion

Inappropriate antibiotic use were influenced by general lack of knowledge on antibiotics and identification of antibiotics by colours of capsules which leads to confusion and could lead to inappropriate antibiotic use. There is the need for public health education on appropriate antibiotic use and standardization of appearance of antibiotics and other drugs to optimize use.
Traditional and cortical trajectory screws of static and dynamic lumbar fixation- a finite element study
Authors: Liu Che-Wei , Wang Lu-Lin , Xu Yu-Kun , Chen Chun-Ming , Wang Jian-Cyuan , Tsai Wei-Tsung , Lin Shang-Chih
Published: July 2020

Background

Two types of screw trajectories are commonly used in lumbar surgery. Both traditional trajectory (TT) and cortical bone trajectory (CBT) were shown to provide equivalent pull-out strengths of a screw. CBT utilizing a laterally-directed trajectory engaging only cortical bone in the pedicle is widely used in minimal invasive spine posterior fusion surgery. It has been demonstrated that CBT exerts a lower likelihood of violating the facet joint, and superior pull-out strength than the TT screws, especially in osteoporotic vertebral body. No design yet to apply this trajectory to dynamic fixation. To evaluate kinetic and kinematic behavior in both static and dynamic CBT fixation a finite element study was designed. This study aimed to simulate the biomechanics of CBT-based dynamic system for an evaluation of CBT dynamization.

Methods

A validated nonlinearly lumbosacral finite-element model was used to simulate four variations of screw fixation. Responses of both implant (screw stress) and tissues (disc motion, disc stress, and facet force) at the upper adjacent (L3-L4) and fixed (L4-L5) segments were used as the evaluation indices. Flexion, extension, bending, and rotation of both TT and CBT screws were simulated in this study for comparison.

Results

The results showed that the TT static was the most effective stabilizer to the L4-L5 segment, followed by CBT static, TT dynamic, and the CBT dynamic, which was the least effective. Dynamization of the TT and CBT fixators decreased stability of the fixed segment and alleviate adjacent segment stress compensation. The 3.5-mm diameter CBT screw deteriorated stress distribution and rendered it vulnerable to bone-screw loosening and fatigue cracking.

Conclusions

Modeling the effects of TT and CBT fixation in a full lumbosacral model suggest that dynamic TT provide slightly superior stability compared with dynamic CBT especially in bending and rotation. In dynamic CBT design, large diameter screws might avoid issues with loosening and cracking.
A clinical trial to evaluate the effect of statin use on lowering aldosterone levels
Authors: Hornik Ezra S. , Altman-Merino Anne E. , Koefoed Andrew W. , Meyer Kayla M. , Stone Isabella B. , Green Jessica A. , Williams Gordon H. , Adler Gail K. , Williams Jonathan S.
Published: July 2020

Background

Statins are the first-line pharmaceutical agent in the management of hypercholesterolemia and cardiovascular (CV) risk reduction, and the most commonly prescribed class of drugs worldwide. Studies describing CV risk reduction independent of LDL-cholesterol lowering have evoked an interest in the pleiotropic mechanisms of statins’ benefits. We recently demonstrated that administration of statins in animal models lowers aldosterone levels and observed an association between statin use and reduced aldosterone levels in two human cohorts, with lipophilic statins displaying a greater effect than hydrophilic statins. Therefore, we designed a randomized, placebo-controlled, double-blinded intervention study to assess whether statin treatment lowers aldosterone in a type-dependent manner in humans, with simvastatin (lipophilic) showing a greater effect than pravastatin (hydrophilic).

Methods/design

One hundred five healthy participants will be recruited from the general population to enroll in a 12-week, randomized, placebo-controlled, double-blinded, 3-arm clinical trial. Ninety participants are anticipated to complete the protocol. After baseline assessment of aldosterone levels, participants will be randomized to daily simvastatin, pravastatin, or placebo. Aldosterone levels will be assessed after 2 days on study drug and again after 6 weeks and 12 weeks on study drug. Prior to each aldosterone assessment, participants will consume an isocaloric sodium and potassium-controlled run-in diet for 5 days. Assessments will occur on an inpatient research unit to control for diurnal, fasting, and posture conditions. The primary outcome will compare 12-week angiotensin II-stimulated serum aldosterone by study drug. Secondary outcomes will compare baseline and 12-week 24-h urine aldosterone by study drug.

Discussion

Results from this rigorous study design should provide strong support that statins lower aldosterone levels in humans. These results may explain some of the beneficial effects of statins that are not attributed to the LDL-lowering effect of this important class of medications. Results would demonstrate that statin lipophilicity is an important attribute in lowering aldosterone levels. The outcomes of this program will have implications for the design of studies involving statin medications, as well as for the differential use of classes of statins.

Trial registration

ClinicalTrials.gov; NCT02871687; First Posted August 18, 2016.
Assessment of medical professionalism using the Professionalism Mini Evaluation Exercise (P-MEX) in a multi-ethnic society: a Delphi study
Authors: Fong Warren , Kwan Yu Heng , Yoon Sungwon , Phang Jie Kie , Thumboo Julian , Leung Ying Ying , Ng Swee Cheng
Published: July 2020

Background

The importance of medical professionalism and its assessment has been well documented in the literature. However, there is currently no culturally-adapted tool to assess medical professionalism in Singapore. This study sets out to find consensus on relevance of the items from the Professionalism Mini Evaluation Exercise (P-MEX) for assessing medical professionalism in Singapore.

Methods

A two-round Delphi survey was completed by an expert panel consisting of program directors, associate designated institutional officials, and designated institutional official (n = 15) from residency programs in Singapore. Round 1 comprised of 23 items from the P-MEX rated on a 5-point scale (1 = Definitely include, 2 = Possibly include, 3 = Neutral, 4 = Possibly exclude, 5 = Definitely exclude). In round 2, the experts received feedback from the previous round, and were asked to re-rate the items which did not achieve consensus in the previous round. The threshold for consensus in the study was defined as 70% or greater agreement among experts.

Results

Completed questionnaires for both rounds were received from all 15 experts. In round 1, 18 items (78%) achieved consensus to be included. In round 2, 1 (4%) item achieved consensus to be included. However, none of the remaining items achieved consensus to be removed, and they exhibited stability in responses. A list of 19 items covering four domains of medical professionalism (Doctor-patient relationship skills, Reflective skills, Time management and Inter-professional relationship skills) was obtained during the two-rounds of Delphi survey.

Conclusions

Nineteen items in the P-MEX had garnered consensus and is suitable for assessing medical professionalism in Singapore. The findings of this study can provide guidance for faculty and institutions who want to assess medical professionalism of their medical trainees.
Bin it or pin it? Which professional ethical guidance on managing COVID-19 should I follow?
Authors: Huxtable Richard
Published: July 2020

Background

As the COVID-19 (coronavirus) pandemic develops, healthcare professionals are looking for support with, and guidance to inform, the difficult decisions they face. In the (current) absence of an authoritative national steer in England, professional bodies and local organisations have been developing and disseminating their own ethical guidance. Questions inevitably arise, some of which are particularly pressing during the pandemic, as events are unfolding quickly and the field is becoming crowded. My central question here is: which professional ethical guidance should the professional follow?

Main body

Adopting a working definition of “professional ethical guidance”, I offer three domains for a healthcare professional to consider, and some associated questions to ask, when determining whether – in relation to any guidance document – they should “bin it or pin it”. First, the professional should considerthe source of the guidance: is the issuing body authoritative or, if not, at least sufficiently influential that its guidance should be followed? Second, the professional should considerthe applicability of the guidance, ascertaining whether the guidance is available and, if so, whether it is pertinent. Pertinence has various dimensions, including whether the guidance applies to this professional, this patient and/or this setting, whether it is up-to-date, and whether the guidance addresses the situation the professional is facing. Third, the professional should considerthe methodology and methods by which the guidance was produced. Although the substantive quality of the guidance is important, so too are the methods by which it was produced. Here, the professional should ask whether the guidance is sufficiently inclusive – in terms of who has prepared it and who contributed to its development – and whether it was rigorously developed, and thus utilised appropriate processes, principles and evidence.

Conclusion

Asking and answering such questions may be challenging, particularly during a pandemic. Furthermore, guidance will not do all the work: professionals will still need to exercise their judgment in deciding what is best in the individual case, whether or not this concerns COVID-19. But such judgments can and should be informed (and constrained) by guidance, and hopefully these preliminary observations will provide some useful pointers for time-pressed professionals.
Incorporating oral health care education in undergraduate nursing curricula - a systematic review
Authors: Bhagat Vandana , Hoang Ha , Crocombe Leonard A. , Goldberg Lynette R.
Published: July 2020

Background

The recognised relationship between oral health and general health, the rapidly increasing older population worldwide, and changes in the type of oral health care older people require have raised concerns for policymakers and health professionals. Nurses play a leading role in holistic and interprofessional care that supports health and ageing. It is essential to understand their preparation for providing oral health care.

Objective: To synthesise the evidence on nursing students’ attitudes towards, and knowledge of, oral healthcare, with a view to determining whether oral health education should be incorporated in nursing education.

Methods

Data sources: Three electronic databases - PubMed, Scopus, and CINAHL.

Study eligibility criteria, participants and interventions: Original studies addressing the research objective, written in English, published between 2008 and 2019, including students and educators in undergraduate nursing programs as participants, and conducted in Organisation of Economic Co-operation and Development countries.

Study appraisal and synthesis methods: Data extracted from identified studies were thematically analysed, and quality assessment was done using the Mixed Methods Appraisal Tool.

Results

From a pool of 567 articles, 11 met the eligibility criteria. Findings documented five important themes: 1.) nursing students’ limited oral health knowledge; 2.) their varying attitudes towards providing oral health care; 3.) the need for further oral health education in nursing curricula; 4.) available learning resources to promote oral health; and 5.) the value of an interprofessional education approach to promote oral health care in nursing programs.

Limitations: The identified studies recruited small samples, used self-report questionnaires and were conducted primarily in the United States.

Conclusions

The adoption of an interprofessional education approach with a focus on providing effective oral health care, particularly for older people, needs to be integrated into regular nursing education, and practice. This may increase the interest and skills of nursing students in providing oral health care. However, more rigorous studies are required to confirm this. Nursing graduates skilled in providing oral health care and interprofessional practice have the potential to improve the oral and general health of older people.