bluuebunny/crossref_metadata_2025 huggingface dataset:
Designing combinational herbal drugs based on target space analysis
Authors: Woyessa Assefa Mussa , Bultum Lemessa Etana , Lee Doheon
Published: May 2024

Background

Traditional oriental medicines (TOMs) are a medical practice that follows different philosophies to pharmaceutical drugs and they have been in use for many years in different parts of the world. In this study, by integrating TOM formula and pharmaceutical drugs, we performed target space analysis between TOM formula target space and small-molecule drug target space. To do so, we manually curated 46 TOM formulas that are known to treat Anxiety, Diabetes mellitus, Epilepsy, Hypertension, Obesity, and Schizophrenia. Then, we employed Absorption, Distribution, Metabolism, Excretion, and Toxicity (ADMET) properties such as human ether-a-go-go related gene (hERG) inhibition, Carcinogenicity, and AMES toxicity to filter out potentially toxic herbal ingredients. The target space analysis was performed between TOM formula and small-molecule drugs: (i) both are known to treat the same disease, and (ii) each known to treat different diseases. Statistical significance of the overlapped target space between the TOM formula and small-molecule drugs was measured using support value. Support value distribution from randomly selected target space was calculated to validate the result. Furthermore, the Si-Wu-Tang (SWT) formula and published literature were also used to evaluate our results.

Result

This study tried to provide scientific evidence about the effectiveness of the TOM formula to treat the main indication with side effects that could come from the use of small-molecule drugs. The target space analysis between TOM formula and small-molecule drugs in which both are known to treat the same disease shows that many targets overlapped between the two medications with a support value of 0.84 and weighted average support of 0.72 for a TOM formula known to treat Epilepsy. Furthermore, support value distribution from randomly selected target spaces in this analysis showed that the number of overlapped targets is much higher between TOM formula and small-molecule drugs that are known to treat the same disease than in randomly selected target spaces. Moreover, scientific literature was also used to evaluate the medicinal efficacy of individual herbs.

Conclusion

This study provides an evidence to the effectiveness of a TOM formula to treat the main indication as well as side effects associated with the use of pharmaceutical drugs, as demonstrated through target space analysis.
Low-cost otolaryngology simulation models for early-stage trainees: a scoping review
Authors: Nzisabira Joselyne , Nuss Sarah , Candelo Estephanía , Oumo Ernest Aben , Shah Keshav V. , Kim Eric K. , Wiedermann Joshua , Masimbi Ornella , Shimelash Natnael , Xu Mary Jue
Published: May 2024

Background

Medical simulation is essential for surgical training yet is often too expensive and inaccessible in low- and middle-income countries (LMICs). Furthermore, in otolaryngology-head and neck surgery (OHNS), while simulation training is often focused on senior residents and specialists, there is a critical need to target general practitioners who carry a significant load of OHNS care in countries with limited OHNS providers. This scoping review aims to describe affordable, effective OHNS simulation models for early-stage trainees and non-OHNS specialists in resource-limited settings and discuss gaps in the literature.

Methods

This scoping review followed the five stages of Arksey and O’Malley’s Scoping Review Methodology. Seven databases were used to search for articles. Included articles discussed physical models of the ear, nose, or throat described as “low-cost,” “cost-effective,” or defined as <$150 if explicitly stated; related to the management of common and emergent OHNS conditions; and geared towards undergraduate students, medical, dental, or nursing students, and/or early-level residents.

Results

Of the 1706 studies screened, 17 met inclusion criteria. Most studies were conducted in HICs. Most models were low-fidelity (less anatomically realistic) models. The most common simulated skills were peritonsillar abscess aspiration and cricothyrotomy. Information on cost was limited, and locally sourced materials were infrequently mentioned. Simulations were evaluated using questionnaires and direct observation.

Conclusion

Low-cost simulation models can be beneficial for early medical trainees and students in LMICs, addressing resource constraints and improving skill acquisition. However, there is a notable lack of contextually relevant, locally developed, and cost-effective models. This study summarizes existing low-cost OHNS simulation models for early-stage trainees and highlights the need for additional locally sourced models. Further research is needed to assess the effectiveness and sustainability of these models.
Reducing time to differentiated service delivery for newly-diagnosed people living with HIV in Kigali, Rwanda: a pilot, unblinded, randomized controlled trial
Authors: Ross Jonathan , Anastos Kathryn , Hill Sarah , Remera Eric , Rwibasira Gallican N , Ingabire Charles , Umwiza Francine , Munyaneza Athanase , Muhoza Benjamin , Zhang Chenshu , Nash Denis , Yotebieng Marcel , Murenzi Gad
Published: May 2024

Background

Differentiated service delivery (DSD) programs for people living with HIV (PWH) limit eligibility to patients established on antiretroviral therapy (ART), yet uncertainty exists regarding the duration on ART necessary for newly-diagnosed PWH to be considered established. We aimed to determine the feasibility, acceptability, and preliminary impact of entry into DSD at six months after ART initiation for newly-diagnosed PWH.

Methods

We conducted a pilot randomized controlled trial in three health facilities in Rwanda. Participants were randomized to: (1) entry into DSD at six months after ART initiation after one suppressed viral load (DSD-1VL); (2) entry into DSD at six months after ART initiation after two consecutive suppressed viral loads (DSD-2VL); (3) treatment as usual (TAU). We examined feasibility by examining the proportion of participants assigned to intervention arms who entered DSD, assessed acceptability through patient surveys and by examining instances when clinical staff overrode the study assignment, and evaluated preliminary effectiveness by comparing study arms with respect to 12-month viral suppression.

Results

Among 90 participants, 31 were randomized to DSD-1VL, 31 to DSD-2VL, and 28 to TAU. Among 62 participants randomized to DSD-1VL or DSD-2VL, 37 (60%) entered DSD at 6 months while 21 (34%) did not enter DSD because they were not virally suppressed. Patient-level acceptability was high for both clinical (mean score: 3.8 out of 5) and non-clinical (mean score: 4.1) elements of care and did not differ significantly across study arms. Viral suppression at 12 months was 81%, 81% and 68% in DSD-1VL, DSD-2VL, and TAU, respectively (p = 0.41).

Conclusions

The majority of participants randomized to intervention arms entered DSD and had similar rates of viral suppression compared to TAU. Results suggest that early DSD at six months after ART initiation is feasible for newly-diagnosed PWH, and support current WHO guidelines on DSD.

Trial registration

Clinicaltrials.gov NCT04567693; first registered on September 28, 2020.
A systematic review on reporting quality of economic evaluations for negotiated glucose-lowering drugs in China national reimbursement drug list
Authors: Bao Shi-Yi , Liu Liu , Li Fu-Ming , Yang Yi , Wei Yan , Shao Hui , Ming Jian , Yan Jun-Tao , Chen Ying-Yao
Published: May 2024

Background

This study aimed to examine the reporting quality of existing economic evaluations for negotiated glucose-lowering drugs (GLDs) included in China National Reimbursement Drug List (NRDL) using the Consolidated Health Economic Evaluation Reporting Standards 2013 (CHEERS 2013).

Methods

We performed a systematic literature research through 7 databases to identify published economic evaluations for GLDs included in the China NRDL up to March 2021. Reporting quality of identified studies was assessed by two independent reviewers based on the CHEERS checklist. The Kruskal–Wallis test and Mann–Whitney U test were performed to examine the association between reporting quality and characteristics of the identified studies.

Results

We have identified 24 studies, which evaluated six GLDs types. The average score rate of the included studies was 77.41% (SD:13.23%, Range 47.62%-91.67%). Among all the required reporting items, characterizing heterogeneity (score rate = 4.17%) was the least satisfied item. Among six parts of CHEERS, results part scored least at 0.55 (score rate = 54.79%) because of the incompleteness of characterizing uncertainty. Results from the Kruskal–Wallis test and Mann–Whitney U test showed that model choice, journal type, type of economic evaluations, and study perspective were associated with the reporting quality of the studies.

Conclusions

There remains room to improve the reporting quality of economic evaluations for GLDs in NRDL. Checklists such as CHEERS should be widely used to improve the reporting quality of economic researches in China.
Healthcare social network research and the ECHO model™: Exploring a community of practice to support cultural brokers and transfer cultural knowledge
Authors: Nixon Phil , Broccatelli Chiara , Moss Perrin , Baggio Sarah , Young Angela , Newcomb Dana
Published: May 2024

Background

Project ECHO® networks at Children’s Health Queensland Hospital and Health Service (CHQHHS) are communities of practice designed to mitigate services and systems fragmentation by building collaborative partnerships addressing priority child and youth health needs. Aboriginal and Torres Strait Islander people experience the negative impacts of fragmentation in addition to historical challenges of absent or culturally inappropriate health services. Access to culturally safe and responsive services can be improved by engaging Aboriginal and Torres Strait Islander Health Workers and similar roles in an online community of practice, supporting the integration of cultural and clinical knowledge and self-determination of Aboriginal and Torres Strait Islander consumers in decisions affecting their health.

Analysing professional support networks and knowledge sharing patterns helps identify enablers and barriers to partnerships. Using social network research, the multilevel network inclusive of ECHO network members and their colleagues was studied to identify interdisciplinary and cross-sector advice exchange patterns, explore the position of cultural brokers and identify common relational tendencies.

Methods

Social network theories and methods informed the collection of network data and analysis of advice-seeking relationships among ECHO network members and their nominees. Registered members from two ECHO networks were invited to complete the Qualtrics survey. Networks analysed comprised 398 professionals from mainstream health, Aboriginal and Torres Strait Islander Community Controlled Health Organisation, education, disability and child safety service settings.

Results

Brokers were well represented, both those who hold knowledge brokerage positions as well as cultural brokers who incorporate clinical and cultural knowledge enabling holistic care for Aboriginal and Torres Strait Islander patients (38 individuals, 17% of network). Professionals who occupy brokerage positions outside the ECHO network tend to be more connected with co-members within the network.

Conclusions

This study is the first application of contemporary social network theories and methods to investigate an ECHO network. The findings highlight the connectivity afforded by brokers, enabling the coordination and collaboration necessary for effective care integration. Inclusion of cultural brokers in an ECHO network provides sustained peer group support while also cultivating relationships that facilitate the integration of cultural and clinical knowledge.
Assessing the mental health needs of Yazidi adolescents and young adults in an Iraqi Kurdi IDP Camp: a focus group study
Authors: Benoni Roberto , Giacomelli Chiara , Vegro Giuditta , Hamo Faroq , Avesani Riccardo , Albi Pietro , Gatta Michela , Moretti Francesca
Published: May 2024

Background

Internally displaced people (IDP) in Iraq are 1.2 million (as March 2023). Protracted refugee status endangers the mental health, especially of minorities who survived persecution and conflict, such as the Yazidis. This study aims to identify the mental health needs of Yazidi adolescents and young adults (AYA) in the IDP camp of Bajed Kandala (Iraqi Kurdistan).

Methods

A focus group discussion (FGD) study was conducted between April and August 2022. The FGDs involved AYAs, as well as the staff of the clinic of the Bajed Kandala camp. An inductive approach was adopted referring to the ’theme’ as the unit of content analysis of the text. All FGDs were recorded and transcribed. The analysis was carried out independently by two researchers. The inter-rater agreement was assessed through the Cohen’s k.

Results

A total of 6 FGDs were conducted. The participants were 34 of whom 21 (61.8%) females with a median age of 18.5 years (IQR 17.0–21.0). A total of 156 themes were found as relevant to the objective of this study. Four main areas and twelve subareas of needs in mental health were identified. The interrater agreement over the main area and subareas was good (κ = 0.78 [0.95CI 0.69–0.88], κ = 0.82 [0.95CI 0.73–0.91], respectively). The four areas had a similar frequency: Activities (28.2%), Individual (27.6%), Social relationships (22.4%) and Places/setting (21.8%). The subareas ‘community’ and ‘internal resources’ were labelled as negative 85.7% and 61.9% of the time, respectively. These sub-areas referred to stigma and self-stigma towards mental health. The subarea ‘female condition’ was always considered as negative, as well as the subareas ‘camp’ and ‘tent’ referring to housing as an important social determinant of mental health.

Conclusions

Community stigma and self-stigma are two still important factors preventing the achievement of mental well-being. Alongside these, a gender gap in mental health was identified in the FGDs. These factors should be taken into account in order to guide future mental health interventions in refugee camps.
Cuproptosis: unveiling a new frontier in cancer biology and therapeutics
Authors: Feng Ying , Yang Zhibo , Wang Jianpeng , Zhao Hai
Published: May 2024

Copper plays vital roles in numerous cellular processes and its imbalance can lead to oxidative stress and dysfunction. Recent research has unveiled a unique form of copper-induced cell death, termed cuproptosis, which differs from known cell death mechanisms. This process involves the interaction of copper with lipoylated tricarboxylic acid cycle enzymes, causing protein aggregation and cell death. Recently, a growing number of studies have explored the link between cuproptosis and cancer development. This review comprehensively examines the systemic and cellular metabolism of copper, including tumor-related signaling pathways influenced by copper. It delves into the discovery and mechanisms of cuproptosis and its connection to various cancers. Additionally, the review suggests potential cancer treatments using copper ionophores that induce cuproptosis, in combination with small molecule drugs, for precision therapy in specific cancer types.
Removal of endothelial surface-associated von villebrand factor suppresses accelerate datherosclerosis after myocardial infarction
Authors: Ozawa Koya , Packwood William , Muller Matthew A , Qi Yue , Xie Aris , Varlamov Oleg , McCarty Owen J. , Chung Dominic , López José A. , Lindner Jonathan R.
Published: May 2024

Background

Thromboinflammation involving platelet adhesion to endothelial surface-associated von Willebrand factor (VWF) has been implicated in the accelerated progression of non-culprit plaques after MI. The aim of this study was to use arterial endothelial molecular imaging to mechanistically evaluate endothelial-associated VWF as a therapeutic target for reducing remote plaque activation after myocardial infarction (MI).

Methods

Hyperlipidemic mice deficient for the low-density lipoprotein receptor and Apobec-1 underwent closed-chest MI and were treated chronically with either: (i) recombinant ADAMTS13 which is responsible for proteolytic removal of VWF from the endothelial surface, (ii) N-acetylcysteine (NAC) which removes VWF by disulfide bond reduction, (iii) function-blocking anti-factor XI (FXI) antibody, or (iv) no therapy. Non-ischemic controls were also studied. At day 3 and 21, ultrasound molecular imaging was performed with probes targeted to endothelial-associated VWF A1-domain, platelet GPIbα, P-selectin and vascular cell adhesion molecule-1 (VCAM-1) at lesion-prone sites of the aorta. Histology was performed at day 21.

Results

Aortic signal for P-selectin, VCAM-1, VWF, and platelet-GPIbα were all increased several-fold (p < 0.01) in post-MI mice versus sham-treated animals at day 3 and 21. Treatment with NAC and ADAMTS13 significantly attenuated the post-MI increase for all four molecular targets by > 50% (p < 0.05 vs. non-treated at day 3 and 21). On aortic root histology, mice undergoing MI versus controls had 2–4 fold greater plaque size and macrophage content (p < 0.05), approximately 20-fold greater platelet adhesion (p < 0.05), and increased staining for markers of platelet transforming growth factor-β1 signaling. Accelerated plaque growth and inflammatory activation was almost entirely prevented by ADAMTS13 and NAC. Inhibition of FXI had no significant effect on molecular imaging signal or plaque morphology.

Conclusions

Plaque inflammatory activation in remote arteries after MI is strongly influenced by VWF-mediated platelet adhesion to the endothelium. These findings support investigation into new secondary preventive therapies for reducing non-culprit artery events after MI.
Chiropractic attitude and utilisation of evidence-based practice in South Africa: a secondary analysis
Authors: Naidoo Sharné , Hoenselaar Nicole Karensa , Yelverton Christopher
Published: May 2024

Background

Evidence-Based Practice (EBP) is a model utilised by the majority of healthcare professionals and is a clinical framework that assists with decision-making related to patient care, to improve outcomes and patient satisfaction. The study aimed to analyse the attitudes, skills, and utilization of evidence-based practice (EBP) among South African chiropractors, focusing on perceived skill levels, training, use and identifying facilitators and barriers to EBP application.

Methods

A descriptive cross-sectional quantitative secondary analysis was conducted by inviting registered chiropractors in South Africa (n = 920) to participate in an anonymous online questionnaire using the Evidence-Based Practice Attitude and Utilisation Survey (EBASE).

Results

A total of 132 chiropractors completed the survey, yielding a response rate of 14.4%. Of the respondents, 59.9% were female, 52.3% were between 26 and 35 years old, and 63.3% had graduated from the University of Johannesburg. A third of respondents stated they have poor clinical research skills. Over half of the respondents (56.8%) indicated that EBP constituted a significant part of their education except for completing systematic reviews or meta-analyses. Published clinical evidence was ranked 6th as a source of information for clinical decisions. The obstacles indicated were time constraints and a lack of clinical research in complementary and alternative medicine. Access to the internet, databases and research tools were facilitators that were deemed to be “very useful” in promoting EBP.

Conclusion

The majority of South African chiropractors are generally favourable towards EBP, and this practice therefore appears to be utilised and embraced, with the requisite skills.
Procedural sedation by advanced practice providers in the emergency medical service in the Netherlands: a retrospective study
Authors: van Vliet Risco , Breedveld Lennert , Heutinck Annemieke A.J. , Ockeloen Bram H.A. , van ’ Hof Arnoud W.J. , Moors Xavier R.J.
Published: May 2024

Background

Procedural sedation and analgesia (PSA) is a technique of administering sedatives to induce a state that allows the patient to tolerate painful procedures while maintaining cardiorespiratory function, a condition that is frequently desired prehospital. Non-physician prehospital clinicians often have a limited scope of practice when it comes to providing analgesia and sedation; sometimes resulting in a crew request for back-up from physician-staffed prehospital services.“. This is also the case if sedation is desirable. Advanced practice providers (APPs), who are legally authorized and trained to carry out this procedure, may be a solution when the physician-staffed service is not available or will not be available in time.

Methods

The aim of this study is to gain insight in the circumstances in which an APP, working at the Dutch ambulance service “RAV Brabant MWN” from January 2019 to December 2022, uses propofol for PSA or to provide sedation. With this a retrospective observational document study we describe the characteristics of patients and ambulance runs and evaluates the interventions in terms of safety.

Results

During the study period, the APPs administered propofol 157 times for 135 PSA and in 22 cases for providing sedation. The most common indication was musculoskeletal trauma such as fracture care or the reduction of joint dislocation. In 91% of the situations where propofol was used, the predetermined goal e.g. alignment of fractured extremity, repositioning of luxated joint or providing sedation the goal was achieved. There were 12 cases in which one or more adverse events were documented and all were successfully resolved by the APP. There were no cases of laryngospam, airway obstruction, nor anaphylaxis. None of the adverse events led to unexpected hospitalization or death.

Conclusion

During the study period, the APPs performed 135 PSAs and provided 22 sedations. The success rate of predetermined goals was higher than that stated in the literature. Although there were a number of side effects, their incidences were lower than those reported in the literature, and these were resolved by the APP during the episode of care. Applying a PSA by an APP at the EMS “RAV Brabant MWN” appears to be safe with a high success rate.
Bone marrow mesenchymal stem cell-derived exosomes shuttle microRNAs to endometrial stromal fibroblasts that promote tissue proliferation /regeneration/ and inhibit differentiation
Authors: Bonavina Giulia , Mamillapalli Ramanaiah , Krikun Graciela , Zhou Yuping , Gawde Nimisha , Taylor Hugh S.
Published: May 2024

Background

Human bone marrow-derived stem cells (hBMDSCs) are well characterized mediators of tissue repair and regeneration. An increasing body of evidence indicates that these cells exert their therapeutic effects largely through their paracrine actions rather than clonal expansion and differentiation. Here we studied the role of microRNAs (miRNAs) present in extracellular vesicles (EVs) from hBMDSCs in tissue regeneration and cell differentiation targeting endometrial stromal fibroblasts (eSF).

Methods

Extracellular vesicles (EVs) are isolated from hBMDSCs, characterized by transmission electron microscopy (TEM) and nanoparticle tracking analysis (NTA) techniques. Extracted total RNA from EVs was subjected to RNA seq analysis. Transfection and decidualization studies were carried out in endometrial stromal fibroblasts (eSF). Gene expression was analyzed by qRTPCR. Unpaired t-test with Welch’s correction was used for data analysis between two groups.

Results

We identified several microRNAs (miRNAs) that were highly expressed, including miR-21-5p, miR-100-5p, miR-143-3p and let7. MiR-21 is associated with several signaling pathways involved in tissue regeneration, quiescence, cellular senescence, and fibrosis. Both miR-100-5p and miR-143-3p promoted cell proliferation. MiR-100-5p specifically promoted regenerative processes by upregulating TGF-ß3, VEGFA, MMP7, and HGF. MiR-100-5p blocked differentiation or decidualization as evidenced by morphologic changes and downregulation of decidualization mediators including HOXA10, IGFBP1, PRL, PR-B, and PR.

Conclusion

EVs delivered to tissues by hBMDSCs contain specific miRNAs that prevent terminal differentiation and drive repair and regeneration. Delivery of microRNAs is a novel treatment paradigm with the potential to replace BMDSCs in cell-free regenerative therapies.
CityGML Grotto ADE for modelling niches in 3D with semantic information
Authors: Yang Su , Hou Miaole , Fan Hongchao
Published: May 2024

The regions of East Asia, as well as South Asia and the Middle East are rich in cultural heritage of grottoes where a large number of Buddhist niches exist. Three-dimensional (3D) semantic modelling enriches 3D geometric models with an understanding of the historical and cultural value of cultural heritage, facilitating interoperability and analysis beyond mere visualization. 3D models with semantic information act as essential digital infrastructure for heritage management, knowledge dissemination and simulation analysis in cultural heritage. However, due to the lack of standardized data model for the grotto domain, it is difficult to exchange information, share knowledge and the advancement of spatial analysis and simulation. In order to fill the above-mentioned gap, this study develops a data model for niches as a CityGML Application Domain Extension (ADE) based on the CityGML 3.0 standard. In this ADE, niche components and their attributes are defined on two semantic levels, i.e., niche structural component and niche component member. A famous niche in China belonging to the World Heritage was selected as a case study to demonstrate the integration of geometries, semantics and attributes, illustrating that the extended ADE module complies with the CityGML 3.0 standard. This study provides novel insights into the 3D semantic modelling of niches as well as expands the applications scope of CityGML standard within the cultural heritage sector.
A numerical model for precursory time sequences of the phreatic eruptions of Mt. Ontake, central Japan
Authors: Maeda Yuta
Published: May 2024

The 2014 phreatic eruption of Mt. Ontake was preceded by increased volcano-tectonic (VT) seismicity, but all other types of precursors were obscure. A subsurface process leading to eruption with few precursors has yet to be identified. This study performed numerical simulations to reproduce the precursory time sequence of the eruption. High-temperature water from a cooling magma reservoir was injected into a modeled porous medium filled with cold water. This resulted in an immediate pressure increase and a delayed temperature increase in the shallow parts. The pressure increased immediately because the injected fluid pushed the existing fluid away from the porous medium. A sharp boundary between low (initial)- and high (injected)-temperature regions, known as a thermal front, developed and migrated upward slowly, leading to a delayed temperature increase. The lag time between the pressure and temperature changes is likely responsible for the precursory VT seismicity. If the injected water temperature was less than the critical point, the water was liquid throughout the model region until the thermal front reached a shallow part, where the pressure was low enough for the heated water to vaporize. This vaporization was sudden and large, likely leading to a large eruption with few precursors, similar to the time sequence in 2014. If the injected water temperature was higher, the water volume increased gradually from liquid to supercritical and then to the gas state. This scenario likely led to a small eruption with numerous precursors, similar to the previous eruption of Mt. Ontake that occurred in 2007.

Graphical Abstract
Data-driven gating (DDG)-based motion match for improved CTAC registration
Authors: Cook Ella L. , Su Kuan-Hao , Higgins Geoff S. , Johnsen Robert , Bouhnik Jean-Paul , McGowan Daniel R.
Published: May 2024

Background

Respiratory motion artefacts are a pitfall in thoracic PET/CT imaging. A source of these motion artefacts within PET images is the CT used for attenuation correction of the images. The arbitrary respiratory phase in which the helical CT ($$\hbox{CT}_{\text{helical}}$$

CT
helical

) is acquired often causes misregistration between PET and CT images, leading to inaccurate attenuation correction of the PET image. As a result, errors in tumour delineation or lesion uptake values can occur. To minimise the effect of motion in PET/CT imaging, a data-driven gating (DDG)-based motion match (MM) algorithm has been developed that estimates the phase of the $$\hbox{CT}_{\text{helical}}$$

CT
helical

, and subsequently warps this CT to a given phase of the respiratory cycle, allowing it to be phase-matched to the PET. A set of data was used which had four-dimensional CT (4DCT) acquired alongside PET/CT. The 4DCT allowed ground truth CT phases to be generated and compared to the algorithm-generated motion match CT (MMCT). Measurements of liver and lesion margin positions were taken across CT images to determine any differences and establish how well the algorithm performed concerning warping the $$\hbox{CT}_{\text{helical}}$$

CT
helical

to a given phase (end-of-expiration, EE).

Results

Whilst there was a minor significance in the liver measurement between the 4DCT and MMCT ($$p = 0.045$$

p
=
0.045

), no significant differences were found between the 4DCT or MMCT for lesion measurements ($$p = 1.0$$

p
=
1.0

). In all instances, the $$\hbox{CT}_{\text{helical}}$$

CT
helical

was found to be significantly different from the 4DCT ($$p < 0.001$$

p
<
0.001

). Consequently, the 4DCT and MMCT can be considered equivalent with respect to warped CT generation, showing the DDG-based MM algorithm to be successful.

Conclusion

The MM algorithm successfully enables the phase-matching of a $$\hbox{CT}_{\text{helical}}$$

CT
helical

to the EE of a ground truth 4DCT. This would reduce the motion artefacts caused by PET/CT registration without requiring additional patient dose (required for a 4DCT).
Application of artificial intelligence in hypertension
Authors: Cho Jung Sun , Park Jae-Hyeong
Published: May 2024

Hypertension is an important modifiable risk factor for morbidity and mortality associated with cardiovascular disease. The incidence of hypertension is increasing not only in Korea but also in many Western countries due to the aging of the population and the increase in unhealthy lifestyles. However, hypertension control rates remain low due to poor adherence to antihypertensive medications, low awareness of hypertension, and numerous factors that contribute to hypertension, including diet, environment, lifestyle, obesity, and genetics. Because artificial intelligence (AI) involves data-driven algorithms, AI is an asset to understanding chronic diseases that are influenced by multiple factors, such as hypertension. Although several hypertension studies using AI have been published recently, most are exploratory descriptive studies that are often difficult for clinicians to understand and have little clinical relevance. This review aims to provide a clinician-centered perspective on AI by showing recent studies on the relevance of AI for patients with hypertension. The review is organized into sections on blood pressure measurement and hypertension diagnosis, prognosis, and management.

Graphical Abstract
Inclusivity in health professional education: how can virtual simulation foster attitudes of inclusion?
Authors: Edgar Amanda K. , Tai Joanna , Bearman Margaret
Published: May 2024

Disparities in accessing quality healthcare persist among diverse populations. Health professional education should therefore promote more diversity in the health workforce, by fostering attitudes of inclusion. This paper outlines the potential of virtual simulation (VS), as one method in a system of health professional education, to promote inclusion and diversity. We conceptualise how VS can allow learners to experience an alternative to what HPE currently is by drawing on two social justice theorists, Paulo Freire, and Nancy Fraser and their ideas about ‘voice’ and ‘representation’. We present two principles for VS design and implementation: (1) giving voice to learners has the power to transform; and (2) representation in VS builds inclusion. We provide practical means of building voice and representation into VS learning activities, followed by an example. Purposeful and thoughtful integration of these principles paves the way for a more diverse and inclusive healthcare workforce.
Comprehensive visualization of bariatric surgery and gut microbiota research: a global analysis
Authors: Zyoud Sa’ed H. , Shakhshir Muna , Barqawi Abdelkarim , Abushanab Amani S. , Koni Amer , Khilfeh Shadi , Shahwan Moyad , Jairoun Ammar A. , Taha Adham Abu , Abushamma Faris , Al-Jabi Samah W.
Published: May 2024

Background

In recent years, there has been a noteworthy increase in research exploring the relationship between gut microbiota and bariatric surgery. This increase can be attributed to the growing recognition of the importance of gut microbiota in diverse health issues, such as obesity, and its alterations following bariatric surgery. Consequently, this study seeks to employ bibliometric analysis to show the current research landscape and identify key areas of focus for future investigations on the link between bariatric surgery and gut microbiota.

Methods

We conducted a comprehensive search of the Scopus database to gather literature concerning bariatric surgery and its impact on the gut microbiota. The search encompassed documents published between 2009 and 2023. To analyze the bibliometric data, we employed diverse metrics, including publication count, citation count, and evaluation of the performance of countries, institutions, and journals. Additionally, we utilized VOSviewer to visually present the findings.

Results

A total of 555 articles focused on the correlation between bariatric surgery and the gut microbiota. Original research articles constituted 55.32% of all publications on this topic, followed by reviews at 37.30%. The leading countries in terms of publication volume were the USA (n = 156; 28.11%), China (n = 73; 13.15%), and the UK (n = 52; 9.37%). Co-occurrence analysis highlighted three main clusters of research topics: (1) the impact of bariatric surgery on the gut microbiota composition in relation to obesity remission, (2) the relationship between glucose metabolism, circulating bile acids, gut hormones, and gut microbiome remodeling, and (3) the connections between alterations in the gut microbiota and insulin resistance.

Conclusions

Ongoing research has investigated the connection between bariatric surgery and the gut microbiota, providing new perspectives on metabolic improvements after surgery. Further studies are necessary to comprehensively grasp how bariatric procedures influence the gut microbiota and to formulate precise interventions aimed at optimizing the health advantages of surgery.
Distinct mechanisms of attentional suppression: exploration of trait factors underlying cued- and learned-suppression
Authors: Chidharom Matthieu , Carlisle Nancy B.
Published: May 2024

Attention allows us to focus on relevant information while ignoring distractions. Effective suppression of distracting information is crucial for efficient visual search. Recent studies have developed two paradigms to investigate attentional suppression: cued-suppression which is based on top-down control, and learned-suppression which is based on selection history. While both types of suppression reportedly engage proactive control, it remains unclear whether they rely on shared mechanisms. This study aimed to determine the relationship between cued- and learned-suppression. In a within-subjects design, 54 participants performed a cued-suppression task where pre-cues indicated upcoming target or distractor colors, and a learned-suppression task where a salient color distractor was present or absent. No significant correlation emerged between performance in the two tasks, suggesting distinct suppression mechanisms. Cued-suppression correlated with visual working memory capacity, indicating reliance on explicit control. In contrast, learned-suppression correlated with everyday distractibility, suggesting implicit control based on regularities. These results provide evidence for heterogeneous proactive control mechanisms underlying cued- and learned-suppression. While both engage inhibition, cued-suppression relies on deliberate top-down control modulated by working memory, whereas learned-suppression involves implicit suppression shaped by selection history and distractibility traits.
Leveraging virtual datasets to investigate the interplay of pollinators, protected areas, and SDG 15
Authors: Whipple Sarah , Moss Stefan
Published: May 2024

Biodiversity loss amplifies the need for taxonomic understanding at global, regional, and local scales. The United Nations Environmental Programme Sustainable Development Goals are explicit in their demand for greater accountability with respect to ecosystem management, and Sustainable Development Goal 15, Life on Land, specifically calls for a halt to biodiversity loss. Pollinators (bees and butterflies) are two functional groups with public attention for protection, yet little long-term data availability. National Parks, including those in the United States, act as optimal sites to study biodiversity loss, but historic data tends to vary in availability. This study addresses systematic taxonomic and digitalization biases present within historic (museum), modern (citizen science), and non-digitized (private collection) datasets for Yellowstone and Grand Teton National Parks from 1900 to 2021. We find that, although database record availability is representative of butterfly and bumble bee groups known for the area, categories such as data rescue, digitalization/availability, and management/archiving vary across database types. These findings on virtual datasets offer opportunities for conservationists to understand the efficacy of digitized collections in addressing questions of species loss over time, including the strengths and pitfalls of digitized data repositories. Additionally, virtual datasets can be utilized to monitor biodiversity under Sustainable Development Goal 15 targets while also promoting broader access to resources such as museum collections for educational purposes.
A novel approach for preparing aldehyde-free melamine resin and investigation of its retanning performance
Authors: Zhang Chi , Zhou Ji-bo , Sun Nan , Liao Xue-pin , Shi Bi
Published: May 2024

Melamine resin (MR), traditionally synthesized using melamine and formaldehyde, is widely used in the leather industry. However, the emission of free formaldehyde poses a significant challenge for conventional MR. To address the issues of aldehyde in MR, extensive research has been conducted. This paper introduces a novel aldehyde-free MR (LTSL) retanning agent synthesized using cyanuric chloride, l-lysine, and sodium sulfanilate. The chemical structure of LTSL was analyzed via Fourier transform infrared spectroscopy, nuclear magnetic resonance, and X-ray photoelectron spectroscopy. The presence of amino, carboxyl, and sulfonic acid groups in LTSL enhanced its storability and imparted LTSL with an amphoteric character. The isoelectric point of LTSL was optimized to reach 4.37, and LTSL exhibited an appropriate size distribution with an average particle size of 254.17 nm and achieved high absorption rates of 87.77% and 95.84% for retanning and fatliquoring agents, respectively. Consequently, the thickness rate of LTSL reached up to 37%, with no detectable formaldehyde. Notably, LTSL also demonstrated excellent physical and mechanical properties, primarily attributed to the coordination and electrostatic interactions between the chrome-tanned collagen fiber and amino/carboxyl groups in LTSL. This research presents an innovative approach for developing an aldehyde-free MR retanning agent, significantly contributing to the sustainable development of leather manufacturing.

Graphical Abstract
Preparation and characterization of self-aggregating micelles from stearic acid-modified burdock root polysaccharide
Authors: Zhang Chenchen , Wang Hongjuan , Zhang Yan , Song Jiangfeng , Li Ying
Published: May 2024

In order to obtain amphiphilic polysaccharide self-assembly micelles, the hydrophobic modification by grafting stearic acid (SA) onto the backbone of burdock root polysaccharide (BRP) was carried out and its main physicochemical properties were characterized. The results showed that the optimal esterification conditions were as follows: reaction time of 2 h, reaction temperature of 55 ℃, system pH of 8.0 and the SA addition of 4 mmol, a maximum substitution degree (DS) of the esterification products was obtained as 0.1012. The FTIR analysis verified that the modified polysaccharide successfully introduced the ester carbonyl group. 1H NMR spectra further confirmed that the esterification reaction occurred. The SA-modified BRP micelles were roughly spherical with uniform dispersion and the particle size was in the range of 259–352 nm, which showed a negative correlation with the DS. The solubility of the esterification products also decreased. The smaller critical micelle concentration (CMC) led to easier formation of self-aggregating micelles and stronger solubilization effect. The above results indicated that SA-modified BRP as a novel carrier material possessed potential to deliver hydrophobic active substances.

Graphical Abstract
Platelet indices as a predictive marker in neonates with respiratory distress
Authors: Abdelrashid Sarah , Aref Manar
Published: May 2024

Background

The neonatal intensive care unit (NICU) frequently gets admissions due to respiratory distress (RD). Platelet indices are a beneficial biomarker in order to gauge the severity of neonatal RD. We aimed to assess platelet indices as a potential predictor in neonates with RD.

Methods

This prospective research involved 120 neonates who had been admitted to the NICU with evidence of RD. On admission and after respiratory support was reduced; a complete blood count (CBC) was performed to determine platelet count (PC), mean platelet volume (MPV), plateletcrit (PCT), platelet distribution width (PDW), platelet mass index (PMI), and platelet large cell ratio (PLCR).

Results

MPV and PDW were significantly higher after respiratory support reduction. PC and PMI were significantly higher in neonates exhibiting moderate and severe distress. PC of 276.5*109/L had the highest degree of predictability of RD severity (area under curve (AUC) 0.762, sensitivity 81.5%, specificity 64.3%), 95% confidence interval (0.7–0.9), while PMI of 2473.5 fL/nL was the best cut-off point to predict severity of RD (AUC 0.663, sensitivity 63%, specificity 57.1%) 95% confidence interval (0.6–0.8). There was a significant difference in the average PC between different oxygen modes.

Conclusion

Higher PMI and PC are associated with moderate and severe RD and can be used to predict the severity of neonatal RD.
Automated breast ultrasound in breast cancer screening of mammographically dense breasts: added values
Authors: Gouda Walaa , Yasin Rabab , Yasin Mohamed Ibrahim , Omar Suzan
Published: May 2024

Background

Full-field digital mammography (FFDM) is the primary screening method for breast cancer, yet the number of cancers that can be missed with mammography is considerable, notably in female with dense breast. In this study, we compared the diagnostic yield and the clinical significance of FFDM for breast cancer detection in female with dense breasts versus its performance when complemented by automated breast ultrasound (ABUS).

Results

This retrospective study was performed during the period between January 2022 and December 2022 including 500 females with dense breast (ACR C&D), who underwent screening using FFDM and ABUS. The images were retrospectively interpreted, and statistical assessments were done comparing the FFDM results alone and after complemented with ABUS. Significance was considered at a p value less than 0.05. The use of FFDM with supplemental ABUS has reduced the numbers of recall and showed improved breast cancer detection with increased positive predictive value (from 74.5 to 83.5%). In comparison, using FFDM alone and associated with ABUS, there was moderate agreement with a kappa test of 0.51; p < 0.001.

Conclusion

ABUS can be a useful and powerful diagnostic imaging tool when adjunct to FFDM for screening of dense breast. In this study, ABUS showed less false-negative results and improved the sensitivity of cancer detection.
Preclinical study on camellia sinensis extract-loaded nanophytosomes for enhancement of memory-boosting activity: optimization by central composite design
Authors: Mane Varsha , Killedar Suresh , More Harinath , Tare Harshal
Published: May 2024

Background

The purpose of the present study was to enhance the memory-boosting activity of the standardized hydroalcoholic Camellia sinensis extract (CSE) by the formation of nanophytosomes with Leciva S70 phospholipid. The central composite design was used to optimize the solvent evaporation method for the formulation of C. sinesis phytosomes (CSP).

Results

The optimized formulation had a mean particle size of 212.3 nm ± 0.39, PDI of 0.238 ± 0.0197, and zeta potential of −42.02 ± 0.995 mV. C. sinensis phytosome formation was confirmed by analytical techniques. The aqueous solubility of the developed CSP was 95.92 ± 0.31, which is 7.34 times greater than that of pure CSE (13.07 ± 0.19). CSP was found more effective than either pure CSE (26.42 ± 0.4654%) or the physical mixture (32.15 ± 0.4596%) in releasing the CSE from the formulation (72.16 ± 0.5248%). Acute toxicity study corroborated the safety of CSP in rats. CSP demonstrated a significant (p < 0.05) reduction in escape and transferred latency on both days (15th and 16th) as compared to CSE, indicating the improvement of the memory-boosting activity. Furthermore, CSP-treated rats significantly improved acetylcholine (Ach) levels and brain tissue concentration compared with CSE. Moreover, the phytosomal formulation of CSP exhibited its rationality with an improvement of bioavailability by 3.21 folds compared with pure CSE.

Conclusion

The presence of phospholipids in the CSP formulation and the formation of smaller particles may aid in crossing the blood–brain barrier, increasing brain tissue concentration and bioavailability. This, in turn, leads to an increase in memory-boosting activity.

Graphical abstract
Geophysics Bright Spots
Authors: Behura Jyoti
Published: May 2024

Geophysics Bright Spots reviews a number of interesting research articles from recent issues of the journal Geophysics.