bluuebunny/crossref_metadata_2025_split huggingface dataset:
MUC5B regulates goblet cell differentiation and reduces inflammation in a murine COPD model
Authors: Huang Xuan , Guan Weijie , Xiang Bin , Wang Wei , Xie Yanqing , Zheng Jinping 
Published: January 2022

Abstract
Background
Airway mucus hypersecretion is one of the important pathological features of chronic obstructive pulmonary disease (COPD). MUC5B is the main mucin expressed in the airways of COPD patients and has been indicated to play an important role in airway defense. However, the specific biological function of MUC5B in COPD and the possible mechanism are not clear.

Methods
We established a COPD model with 24-week-old MUC5B−/− mice exposed to cigarette smoke and tested our hypothesis through lung function tests, HE and PAS staining, immunohistochemistry (IHC), western blot, q-PCR and ELISA.

Results
Compared with MUC5B+/+ mice, MUC5B−/− mice had worse general condition and lung function, increased inflammatory infiltration, reduced goblet cell differentiation as indicated by decreased PAS staining (PAS grade: 1.8 ± 0.24 vs. 0.6 ± 0.16), reduced MUC5AC expression (ELISA: 0.30 ± 0.01 vs. 0.17 ± 0.01 mg/ml, q-PCR: 9.4 ± 1.7 vs. 4.1 ± 0.1 fold, IHC score: 3.1 ± 0.9 vs. 1.6 ± 0.7), increased macrophage secretion of inflammatory factors (TNF-α and IL-6) and expression of downstream pathway factors (ERK1/2 and NF-κB), decreased expression of SPDEF and STAT6, and increased expression of FOXA2.

Conclusion
The protective effect of MUC5B in the development of COPD was mediated by the promotion of goblet cell differentiation and the inhibition of inflammation. The role of MUC5B in regulating inflammation was related to macrophage function, and goblet cell differentiation was promoted by the induced expression of STAT6 and SPDEF. This study describes a mechanism of mucus hypersecretion and identifies MUC5B as a new target for the treatment of mucus hypersecretion.
Fertility trends and comparisons in a historical cohort of US women with primary infertility
Authors: Sadecki Emily , Weaver Amy , Zhao Yulian , Stewart Elizabeth A. , Ainsworth Alessandra J. 
Published: January 2022

Abstract
Background
There is growing interest in long-term outcomes following infertility and infertility treatment. However, there are few detailed longitudinal cohorts available for this work. This study aimed to assemble a historical cohort of women with primary infertility and age-matched controls to evaluate fertility trends, sequelae, and sociodemographic differences. Described here are cohort group characteristics and associated reproductive trends over time.

Methods
A population-based historical cohort was created using the Rochester Epidemiology Project (REP) record-linkage system (Olmsted County, MN). The cohort included women aged 18–50 with a diagnosis of primary infertility between January 1, 1980, and December 31, 1999. As part of a case–control study, we identified 1:1 age-matched female controls from the same community and era.

Results
A total of 1001 women with primary infertility and 1001 age-matched controls were identified. The women with primary infertility were significantly more likely to be married, college educated, use barrier contraception, and non-smokers compared to age-matched controls. The incidence of primary infertility increased from 14 to 20 per 10,000 person years from 1980–1985 to 1995–1999. Ovulatory dysfunction and unexplained infertility were the most common causes of primary infertility and clomiphene was the most widely used fertility medication. Rates of in vitro fertilization (IVF) increased from 1.8% during 1980–1985 to 26.0% during 1995–1999.

Conclusion
Women with primary infertility were found to have unique sociodemographic characteristics compared to age-matched control women, which is consistent with previous research. The incidence of diagnosed primary infertility increased from 1980 to 1999, as did use of IVF.
Validation of an obstetric fistula screening questionnaire: a case–control study with clinical examination
Authors: Chen Chi Chiung Grace , Long Annelise , Rwabizi Denis , Mbabazi Gerard , Ndizeye Ntwali , Dushimiyimana Blaise , Ngoga Eugene 
Published: January 2022

Abstract
Background
Obstetric fistula (OF) is a significant cause of maternal morbidity in lower resource settings where women experience obstructed labor without timely access to skilled obstetric care. The true prevalence of OF is unknown; however, it is estimated to affect 2 to 3.5 million women globally. The Demographic and Health Surveys’ (DHS) Fistula Module includes the OF symptom questions most frequently used for prevalence estimates, but these questions have not been validated. The aim of this study is to validate a symptom-based screening questionnaire for OF, including a question in the DHS’ Fistula Module.

Methods
With an international panel of fistula surgeons, we developed and face-validated a screening questionnaire that assessed for symptoms of lower urinary tract fistula (LUTF) and lower gastrointestinal tract fistula (LGTF), as well as urinary and fecal incontinence (UI, FI). We evaluated the discriminative ability of the questionnaire using a case–control study design in a 1:2:2 ratio: cases were parous women with fistula confirmed on examination, controls included parous women without fistula on examination, with and without UI symptoms. All women underwent screening for fistula symptoms and a physical examination, with examiners blinded to screening results.

Results
Of the 367 Rwandan women who completed the questionnaires and underwent clinical examination, 59 women had LUTFs and 34 had LGTFs, 274 women were classified as controls with and without symptoms of UI. All LUTF screening questions performed well, including the DHS fistula question. The combination of two LUTF screening questions had the highest sensitivity (100%; 95% CI 94%, 100%), specificity (96%; 95% CI 93%, 98%), and area under the curve (AUC) (0.98). The combination of a LGTF screening question and FI question demonstrated the highest sensitivity (97%; 95% CI 85%, 100%), specificity (98%; 95% CI 95%, 99%) and AUC (0.98).

Conclusions
Our OF screening questionnaire, including the DHS fistula question, demonstrated high sensitivities, specificities, and AUC.
The ongoing impact of Covid-19 pandemic on children with medical complexity: the experience of an Italian pediatric palliative care network
Authors: Grigoletto Veronica , Nardin Bianca , Taucar Valentina , Barbi Egidio , De Zen Lucia 
Published: January 2022

Abstract
Background
Italy was the first European country to experience a massive outbreak of Sars-coV-2 in March 2020. Severe measures were introduced to face the pandemic, significantly impacting all healthcare services, including pediatric palliative care (PPC) networks. We investigated how the Covid-19 pandemic modified the provision of PPC services in Friuli Venezia Giulia, Italy. Both the acute and long-term impacts on the families were addressed.

Methods
We administered a retrospective three-sections online questionnaire to the eligible families assisted by our regional PPC network. Inclusion criteria were: child needing specialistic PPC, adequate knowledge of the Italian language, being in charge of the PPC regional network of Friuli Venezia Giulia from February 1, 2020. The three sections examined the same issues in different periods: the pre-covid period (until February 29, 2020), the lockdown period (March 1, 2020, to April 30, 2020), and the post-lockdown period (May 2021).

Results
Twelve patients were included. During the lockdown period, 54.6% of children had to stop physiotherapy sessions, while, among those who continued, 80.0% experienced a reduction in the sessions’ frequency. In the post-lockdown period, 45.5% of children did not have physiotherapy as often as before the pandemic onset. Overall, the access to medical visits during the lockdown and after its end was significantly reduced (p = 0.01).
The level of support perceived by the families descended from grade 3 (intermediate) in the pre-covid period to 2 (low) during the lockdown (p < 0.05) and returned to grade 3 in the post-lockdown period.

Conclusion
The COVID-19 pandemic and the related restrictions impacted the families and caused a transitory contraction of the perceived support. The most significant change was reduced access to medical visits and physiotherapy, which lasted over a year after the start of the pandemic.
Techno-economic assessment for the production of algal fuels and value-added products: opportunities for high-protein microalgae conversion
Authors: Wiatrowski Matthew , Klein Bruno C. , Davis Ryan W. , Quiroz-Arita Carlos , Tan Eric C. D. , Hunt Ryan W. , Davis Ryan E. 
Published: January 2022

Abstract
Background
Microalgae possess numerous advantages for use as a feedstock in producing renewable fuels and products, with techno-economic analysis (TEA) frequently used to highlight the economic potential and technical challenges of utilizing this biomass in a biorefinery context. However, many historical TEA studies have focused on the conversion of biomass with elevated levels of carbohydrates and lipids and lower levels of protein, incurring substantial burdens on the ability to achieve high cultivation productivity rates relative to nutrient-replete, high-protein biomass. Given a strong dependence of algal biomass production costs on cultivation productivity, further TEA assessment is needed to understand the economic potential for utilizing potentially lower-cost but lower-quality, high-protein microalgae for biorefinery conversion.

Results
In this work, we conduct rigorous TEA modeling to assess the economic viability of two conceptual technology pathways for processing proteinaceous algae into a suite of fuels and products. One approach, termed mild oxidative treatment and upgrading (MOTU), makes use of a series of thermo-catalytic operations to upgrade solubilized proteins and carbohydrates to hydrocarbon fuels, while another alternative focuses on the biological conversion of those substrates to oxygenated fuels in the form of mixed alcohols (MA). Both pathways rely on the production of polyurethanes from unsaturated fatty acids and valorization of unconverted solids for use as a material for synthesizing bioplastics. The assessment found similar, albeit slightly higher fuel yields and lower costs for the MA pathway, translating to a residual solids selling price of $899/ton for MA versus $1033/ton for MOTU as would be required to support a $2.50/gallon gasoline equivalent (GGE) fuel selling price. A variation of the MA pathway including subsequent upgrading of the mixed alcohols to hydrocarbon fuels (MAU) reflected a required solids selling price of $975/ton.

Conclusion
The slight advantages observed for the MA pathway are partially attributed to a boundary that stops at oxygenated fuels versus fungible drop-in hydrocarbon fuels through a more complex MOTU configuration, with more comparable results obtained for the MAU scenario. In either case, it was shown that an integrated algal biorefinery can be economical through optimal strategies to utilize and valorize all fractions of the biomass.
Immune milieu and microbiome of the distal urethra in Ugandan men: impact of penile circumcision and implications for HIV susceptibility
Authors: Galiwango Ronald M. , Park Daniel E. , Huibner Sanja , Onos Abigail , Aziz Maliha , Roach Kelsey , Anok Aggrey , Nnamutete James , Isabirye Yahaya , Wasswa John Bosco , Male Deo , Kigozi Godfrey , Tobian Aaron A. R. , Prodger Jessica L. , Liu Cindy M. , Kaul Rupert 
Published: January 2022

AbstractBackgroundCoronal sulcus (CS) anaerobe abundance and IL-8 levels are linked to HIV acquisition, and are dramatically reduced after penile circumcision (PC). The distal urethra may be the site of some HIV acquisition before PC, and presumably most acquisition post PC. We describe the immune milieu and microbiome of the distal urethra in uncircumcised Ugandan men, and define the impact of PC. Participants consisted of HIV-negative, genital symptom-free adult Ugandan men undergoing PC (n= 51). Urethral and coronal sulcus swabs were collected at baseline and at 6- and 12-months post-PC. Soluble immune factors were quantified by multiplex ELISA, and bacterial abundance assessed by 16S rRNA qPCR and sequencing.ResultsAt baseline, the urethra was enriched compared to the CS for most cytokines (including IL-8 and MIP-1β) and soluble E-cadherin (sE-cadherin, an epithelial disruption marker), although CS levels of IL-1α and IL-1β were higher. Baseline total bacterial abundance was ≥ 20-fold higher in the CS than the urethra (median 27,100 vs. 1200 gene copies/swab,p= 0.001), and anaerobes comprised 58% of CS bacteria vs. 42% of urethral bacteria. PC did not alter urethral IL-8 (median 806 at baseline vs. 1130 pg/ml at 12 months;p= 0.062) and urethral sE-cadherin increased (113,223 vs. 158,385 pg/ml,p= 0.009), despite five- and sevenfold drops in total bacterial and anaerobe abundance after PC, respectively. However, PC dramatically reduced CS levels of sE-cadherin (15,843 vs. 837 pg/ml,p< 0.001) and most cytokines (IL-8; 34 vs. 3 pg/ml,p< 0.001), while reducing total bacterial and anaerobe abundance by 13-fold and 60-fold, respectively (bothP≤ 0.004).ConclusionsThe urethra is immunologically rich with characteristics of an HIV-susceptible tissue site. However, PC had no impact on urethral immunology and may have reduced epithelial integrity, despite modest reductions in total bacteria and anaerobes, suggesting that HIV protection from PC is not mediated via immune or microbiome alterations in the urethra.
Effects of foot progression angle on kinematics and kinetics of a cutting movement
Authors: Nishizawa Kohei , Hashimoto Takeshi , Hakukawa Satoshi , Nagura Takeo , Otani Toshiro , Harato Kengo 
Published: January 2022

Abstract
Purpose
Foot progression angle is a key factor for biomechanical knee load, which is associated with noncontact anterior cruciate ligament (ACL) injury during sports-specific tasks. The purpose of the present study was to assess the biomechanics of trunk, pelvis, and lower extremities during a cutting maneuver under different foot progression angles.

Methods
Nineteen male collegiate athletes (ages 18–24) participated in the present study. Cutting motion was analyzed using eight infrared cameras (250 Hz), two force plates (1250 Hz), and 44 reflective markers. Subjects performed 45-degree side cutting maneuvers under three foot progression angles, including 20 degrees (toe-out: TO), 0 degrees (neutral: TN), and − 20 degrees (toe-in: TI). Peak values of each biomechanical parameters in trunk, pelvis, hip, and knee within a first 40% stance phase and each parameter at the timing of the peak vertical ground reaction force were assessed. A statistical analysis was performed to compare data among the three-foot progression angles using the Friedman test.

Results
Peak angles of knee abduction, tibial internal rotation, hip internal rotation, and hip adduction were significantly greater for TI position than for TO position (p < 0.01). Peak moments of knee abduction and tibial internal rotation under TI position were also significantly larger than TO position (p < 0.01). Moreover, greater peak pelvis-trunk rotation was found for TI position than for TN and TO positions (p < 0.01).

Conclusion
From the present study, TI position could lead to an increased risk of ACL injury during a pre-planned cut maneuver, compared to TO position.
Return to Play in Long-Standing Adductor-Related Groin Pain: A Delphi Study Among Experts
Authors: Vergani Luca , Cuniberti Marco , Zanovello Massimo , Maffei Daniele , Farooq Abdulaziz , Eirale Cristiano 
Published: January 2022

AbstractBackgroundGroin pain is a very common injury in multidirectional sports such as soccer, ice hockey, rugby and Australian football. Long-standing adductor-related groin pain is a persistent clinical condition and a frequent complaint in athletes involved in sports that require multiplanar movement patterns (change of direction, high-speed sprinting and kicking). To date, the lack of rehabilitation guidelines and return-to-play criteria makes this clinical entity difficult to manage. The aim of the present Delphi was to suggest, based on opinion and practical experience of a panel of experts, potential criteria that could be taken into consideration by clinicians in the RTP decision-making process in athletes suffering from long-standing adductor-related groin pain.MethodsThirty two out of 40 experts participated to a 3-Round Delphi questionnaire. In round 1, open-ended and closed questions about 9 different sections (palpation, flexibility, strength, patient-reported outcome measures, imaging, intersegmental control, performance tests, sport-specific skills, training load) were proposed to investigate return to play evaluation criteria used by each expert. Responses were analysed and coded to produce round 2 questionnaire that investigated only the sections and the items that reached the cut-off value (≥ 70%). Round 3 questionnaire was based on sections and items that reached cut-off value in previous rounds and experts rated their agreement for return to play criteria with a 5-point Likert Scale. Descriptive statistics enabled interpretation of consensus.ResultsHigh participation rate (80%) and response rate across the 3 rounds (100%) were recorded. 6 sections reached positive consensus in round 1, 1 section reached negative consensus. In round 2 positive consensus was confirmed only for 3 sections and negative consensus for 1 section. In round 3, positive agreement was established for strength (3 items), performance tests (3 items) and sport-specific skills (2 items) sections. Negative consensus was confirmed for imaging section.ConclusionExperts agreed that strength, performance tests and sport-specific skills can be used to support RTP decision, while imaging cannot be used. These findings could be useful in assisting clinicians in the RTP decision making.
Regional uptakes from early-frame amyloid PET and 18F-FDG PET scans are comparable independent of disease state
Authors: Myoraku Alison , Klein Gregory , Landau Susan , Tosun Duygu ,   for the Alzheimer’s Disease Neuroimaging Initiative
Published: January 2022

Abstract
Purpose
Positron emission tomography (PET) imaging with amyloid-beta (Aβ) tracers and 2-[18F] fluoro-2-Deoxy-d-glucose (18F-FDG) is extensively employed in Alzheimer’s disease (AD) studies as biomarkers of AD pathology and neurodegeneration. To reduce cost and additional burdens to the patient, early-frame uptake during Aβ PET scanning has been proposed as a surrogate measure of regional glucose metabolism. Considering the disease state specific impact of AD on neurovascular coupling, we investigated to what extent the information captured in the early frames of an Aβ-PET (18F-florbetapir or 18F-florbetaben) scan is comparable to that of a 18F-FDG PET scan, independent of disease state.

Method
A partial correlation was performed on early-frame 18F-florbetapir and 18F-FDG regional data from 100 participants. In a secondary analysis, we compared 92 18F-florbetapir and 21 18F-florbetaben early-frame Aβ scans from cognitively unimpaired and mild cognitive impairment participants to ascertain if regional early-frame information was similar across different Aβ-PET radioligands.

Results
The partial correlation of early-frame 18F-florbetapir with 18F-FDG was significant in all 84 brain ROIs, with correlation values ranging from 0.61 to 0.94. There were no significant differences between early-frame 18F-florbetapir and 18F-florbetaben images.

Conclusion
Overall, we find that the regional uptake measurements from early-frame 18F-florbetapir are strongly correlated with regional glucose metabolism as measured in ground-truth 18F-FDG PET scans, regardless of disease state. Future studies should focus on longitudinal early-frame amyloid PET imaging studies to further assess the value of early-frame imaging as a marker of brain metabolic decline.
Spectrum of MEFV gene mutations in 4,256 familial Mediterranean fever patients from Iran: a comprehensive systematic review
Authors: Alibakhshi Reza , Mohammadi Aboozar , Ghadiri Keyghobad , Khamooshian Sahand , Kazeminia Mohsen , Moradi Keivan 
Published: January 2022

AbstractBackgroundFamilial Mediterranean fever (FMF), known as a disease with a high prevalence rate among Armenian, Turkish, Jewish, and Arab descent populations, occurs as a result of pathogenic variants in mediterranean fever (MEFV) gene. The aim of this study was to review the spectrum and frequency ofMEFVgene mutations reported among Iranian FMF patients.MethodsAfter performing a systematic review of the literature and implementation of inclusion and exclusion criteria, 16 articles published between 2004 and 2020, involving 4,256 Iranian FMF patients, were included.ResultsA total of 38 differentMEFVgene mutations were identified. The most common mutations among Iranian FMF patients were: p.M694V (c.2080A > G) (20.27%), p.E148Q (c.442G > C) (10.27%), p.V726A (c.2177T > C) (8.24%), p.M680I (both c.2040G > C and c.2040G > A) (7.20%), p.R761H (c.2282G > A) (2.1%), and p.M694I (c.2082G > A) (2. 1%). The frequencies of these mutations were significantly different in different parts of the country.ConclusionsThe ranks and frequencies of p.M694V, p.E148Q, p.V726A, p.M680I, and p.M694I in our population were closer to those observed in the Mediterranean countries, especially in the Middle Eastern Arab populations. Although some comprehensive studies have been performed on Azeri Turkish patients living in northwestern Iran, studies in other areas, especially in eastern Iran, have been very limited. One reason for this observation could be due to the low frequency of FMF patients in those areas. Regardless of the reason for this, the exact spectrum and frequency ofMEFVgene mutations in Iranian FMF patients remain unclear. Therefore, comprehensive future studies in different parts of the country are recommended.
CD5 expression by human ejaculated spermatozoa
Authors: Sereshki Nasrin , Rafiee Mitra , Alipour Razieh , Wilkinson David , Ahmadipanah Vahid 
Published: January 2022

Abstract
Background
A complex of effector and predominant regulatory immune responses are induced in the female reproductive tract (FRT) due to insemination that is necessary to achieve pregnancy. The expression of immune regulatory molecules by spermatozoa indicates the significance of the interaction between spermatozoa and immune cells recruited to the FRT in the preparation of appropriate immunity for pregnancy occurrence. One of the immune regulatory molecules is CD5 whose expression by spermatozoa has not yet been investigated. Therefore, the aim of this study is to investigate the expression of CD5 on the surface of human spermatozoa. Semen samples were collected from 30 healthy men with normal semen status. CD5 expression on purified spermatozoa was evaluated by flow cytometry methods.

Results
The results showed the mean ± SD percentage of CD5 positive spermatozoa was 49.41 ± 8.73.

Conclusion
CD5 is expressed on spermatozoa.