bluuebunny/crossref_metadata_2025_split huggingface dataset:
ULTRASOUND COUNTERACTS INFLAMMATION AND INDUCES CHONDROGENIC DIFFERENTIATION OF ASCS IN 3D PIEZOELECTRIC HYDROGELS
Authors: Manferdini C. , Gabusi E. , Dolzani P. , Trucco D. , Lenzi E. , D'Atri G. , Vannozzi L. , Cafarelli A. , Ricotti L. , Lisignoli G. 
Published: January 2024

In cartilage tissue engineering (TE),new solutions are needed to effectively drive chondrogenic differentiation of mesenchymal stromal cells in both normal and inflammatory milieu. Ultrasound waves represent an interesting tool to facilitate chondrogenesis. In particular, low intensity pulsed ultrasound (LIPUS)has been shown to regulate the differentiation of adipose mesenchymal stromal cells. Hydrogels are promising biomaterials capable of encapsulating MSCs by providing an instructive biomimetic environment, graphene oxide (GO) has emerged as a promising nanomaterial for cartilage TE due to its chondroinductive properties when embedded in polymeric formulations, and piezoelectric nanomaterials, such as barium titanate nanoparticles (BTNPs),can be exploited as nanoscale transducers capable of inducing cell growth/differentiation. The aim of this study was to investigate the effect of dose-controlled LIPUS in counteracting inflammation and positively committing chondrogenesis of ASCs embedded in a 3D piezoelectric hydrogel.ASCs at 2*106 cells/mL were embedded in a 3D VitroGel RGD® hydrogel without nanoparticles (Control) or doped with 25 µg/ml of GO nanoflakes and 50 µg/ml BTNPs.The hydrogels were exposed to basal or inflammatory milieu (+IL1β 10ng/ml)and then to LIPUS stimulation every 2 days for 10 days of culture. Hydrogels were chondrogenic differentiated and analyzed after 2,10 and 28 days. At each time point cell viability, cytotoxicity, gene expression and immunohistochemistry (COL2, aggrecan, SOX9, COL1)and inflammatory cytokines were evaluated.Ultrasound stimulation significantly induced chondrogenic differentiation of ASCs loaded into 3D piezoelectric hydrogels under basal conditions: COL2, aggrecan and SOX9 were significantly overexpressed, while the fibrotic marker COL1 decreased compared to control samples. LIPUS also has potent anti-inflammatory effects by reducing IL6 and IL8 and maintaining its ability to boost chondrogenesis.These results suggest that the combination of LIPUS and piezoelectric hydrogels promotes the differentiation of ASCs encapsulated in a 3D hydrogel by reducing the inflammatory milieu, thus representing a promising tool in the field of cartilage TE.Acknowledgements: This work received funding from the European Union's Horizon 2020 research and innovation program, grant agreement No 814413, project ADMAIORA (AdvanceD nanocomposite MAterIals for in situ treatment and ultRAsound-mediated management of osteoarthritis).
ELECTRICAL STIMULATION COMBINED WITH ADDITIVE MANUFACTURED 3D CONDUCTIVE SCAFFOLDS TOWARDS IMPROVED BONE-TISSUE ENGINEERING STRATEGIES
Authors: Silva J.C. , Garrudo F.F.F. , Meneses J. , Marcelino P. , Barbosa F. , Moura C.S. , Alves N.M. , Pascoal-Faria P. , Ferreira F.C. 
Published: January 2024

The growing number of non-union fractures in an aging population has increased the clinical demand for tissue-engineered bone. Electrical stimulation (ES) has been described as a promising strategy for bone regeneration treatments in several clinical studies. However the underlying mechanism by which ES augments bone formation is still poorly understood and its use in bone tissue engineering (BTE) strategies is currently underexplored. Additive manufacturing (AM) technologies (Fused Deposition Modeling/3D Printing) have been widely used in BTE due to their ability to fabricate scaffolds with a high control over their structural and mechanical properties in a reproducible and scalable manner. Thus, in this work, we combined AM methods with conductive biomaterials and ES to enhance the osteogenic differentiation of human bone marrow-derived mesenchymal stem/stromal cells (hBMSCs) envisaging improved BTE strategies.First, we started by developing AM-based electro-bioreactor devices containing medical-grade electrodes (stainless steel and Ti6Al4V) to apply ES to monolayer 2D cultures and 3D cell-seeded scaffolds. Computer modeling(Finite Element Analysis-FEA) was employed to predict the magnitude/distribution of electrical fields within the ES devices and along the different conductive scaffolds. Prior to scaffold culture, 5 different ES protocols were tested in terms of their ability to promote hBMSCs proliferation and osteogenic differentiation in 2D cultures. The best performance ES protocol was then used in two different AM-based BTE strategies: 1) Two different conductive scaffolds (conductive poly lactic acid (PLA) and titanium) were seeded with hBMSCs and cultured for 21 days under osteogenic medium conditions with and without ES and their biological performance was evaluated in comparison to non-conductive standard PLA scaffolds; 2) Different PEDOT:PSS-based coating solutions were screened to obtain PEDOT:PSS/Gelatin-coated 3D polycaprolactone (PCL) scaffolds with a high(11 S.cm-1) and stable electroconductivity. When cultured under ES, PEDOT:PSS/Gelatin-PCL scaffolds enhanced significantly hBMSCs osteogenic differentiation and mineralization(calcium deposition), highlighting their potential for BTE applications.Acknowledgements: Funding received from FCT through projects InSilico4OCReg (PTDC/EME-SIS/0838/2021), OptiBioScaffold (PTDC/EME-SIS/4446/2020) and BioMaterARISES (EXPL/CTM-CTM/0995/2021), and to the institutions iBB (UIDB/04565/2020), CDRSP (UIDB/04044/2020) and Associate Laboratory i4HB (LA/P/0140/2020).
100G FSO field trial with transmitter power adaptability using a LoRa feedback channel
Authors: Brandão Bruno T. , Fernandes Marco A. , Fernandes Gil M. , Kaai Nourdin , Tomeeva Alina , van Der Wielen Bas , Reid John , Raiteri Daniele , Guiomar Fernando P. , Monteiro Paulo P. 
Published: January 2024

The popularity of free-space optics (FSO) communications is rising as a key enabler for widespread communications since it can provide fiber-like connectivity to regions where fiber deployment is not feasible and radio-frequency (RF) technologies cannot comply with the bandwidth requirements. However, the reliability of FSO links is severely affected by fluctuations in the received optical power caused by weather instability, atmospheric turbulence, and pointing errors. In this work, we propose an adaptive power pre-compensation system enabled by a low-cost, long-range (LoRa) RF feedback link. We experimentally demonstrate this system in a 1.8 km field trial supporting 100 Gbps coherent FSO transmission under approximately 10 dB of slow-fading over a 16 h period. Our results show a considerable reduction of up to 5 dB in the average dynamic range of the receiver and substantial improvement in the link reliability (7% on average) when compared with an estimated fixed power transmission. Further reliability or data-rate improvements can also be achieved with joint optimization of the FEC overhead and the adaptive power transmission scheme.
Snakebite prevalence and risk factors in a nomadic population in Samburu County, Kenya: A community-based survey
Authors: Tianyi Frank-Leonel , Oluoch George O. , Otundo Denis , Ofwete Robert , Ngari Cecilia , Trelfa Anna , Ahmed Sayem , Wang Duolao , Smith Monica , Meta Viviane , Casewell Nicholas R. , Lalloo David G. , Harrison Robert A. , Stienstra Ymkje 
Published: January 2024

Introduction
Snakebite is an important public health concern, especially in tropical areas, but the true burden remains unclear due to sub-optimal reporting and over-reliance on health facility-based data.

Methods
A community-based cross-sectional survey was conducted in Samburu County, Kenya from December 2019 to March 2020. Geospatial techniques were used to create a sampling frame of all households in Samburu County and a multistage cluster sampling strategy to select households and recruit study participants. Five year prevalence and mortality rates were estimated, the characteristics and circumstances of snakebite were described, and multilevel logistic regression models were built to identify independent risk factors for snakebite.

Results
We recruited 3,610 individuals living in 875 households from 30 clusters. The 5-year prevalence of snakebite was 2.2% (95% CI 1.4%–3.4%), and the 5-year mortality rate was 138 (95% CI 44–322) deaths per 100,000 inhabitants, resulting in an estimated 1,406 snakebites and 88 deaths from snakebites per year in Samburu County. Snakebite incidents often occurred at night between 9pm and 6 am (44%, n = 36), and the participants were mostly walking/playing outdoors (51%, n = 41) or sleeping (32%, n = 27) when they were bitten. Lower household socioeconomic status and smaller numbers of people per house were significant independent risk factors.

Conclusion
Samburu County has a high snakebite burden and the most victims are bitten while sleeping or walking outdoors at night. Snakebite prevention and health promotion programs in Samburu County, and other endemic regions, need to be contextualised and consider the geographic, seasonal, and temporal specificities found in our study. Our findings also have implications for health care delivery, especially identification of the need for night-time staffing with expertise in snakebite management and antivenom availability to better manage patients and thereby improve outcomes.
The nutritional status of mycetoma affected patients seen at the Mycetoma Research Center, Sudan
Authors: Gabani Manal Hassan , Ahmed Arwa Abdelraouf , Hassan Alshaima Abdelelah , Abdalla Mona Abdelrahim , Mustafa Samar Abdelmahmoud , Alobaid Tasneem Abdelmutalab , Khatir Abrar Adam , Mohammed Reell Mukhlis , Awad Nehal Ibrahim , Abdellateef Tanzeel Alqurashi , Hassan Abeer , Ahmed Eiman Siddig , Ali Mohammed Zain , Fahal Ahmed Hassan 
Published: January 2024

Nutrition plays a critical and crucial role in addressing neglected tropical diseases (NTDs) and their complications, as they often contribute to malnutrition, which can worsen the impact of these conditions. Therefore, it is necessary to investigate the nutritional status of mycetoma patients, which has not been explored previously.
This descriptive cross-sectional hospital-based study was conducted at the Mycetoma Research Center (MRC), University of Khartoum, Sudan. The study included 179 confirmed mycetoma patients and an equal number of age- and sex-matched normal controls. The nutritional status of the mycetoma patients was assessed and compared with that of the control group. The majority of the patients were young adults with varying educational levels, predominantly from Central Sudan. The foot was the most commonly affected part; most patients had lesions more than 10 cm in diameter.
The Body Mass Index (BMI) was calculated for both study groups, revealing that 43.5% of the patients and 53.6% of controls had a normal BMI. Furthermore, 36% of patients were underweight, contrasting with only 11% in the control group. Correlation analyses indicated no significant associations between BMI and age groups, educational levels, daily meals, food quantity, and appetite in the study population (p > 0.05). Similarly, no significant differences were observed in BMI concerning disease duration and affected sites (p = 0.0577). The Kruskal-Wallis test did not reveal significant differences in BMI means among the groups.
The study revealed that most participants consumed three meals daily, and the control group showed a more robust appetite and consumed more food than the patient group (p = 0.005). Nevertheless, there were no significant differences in the consumption of different food types between the patient and control groups and among different BMI categories (p = 0.025 and 0.040, respectively).
The role of naturally acquired intracellular Pseudomonas aeruginosa in the development of Acanthamoeba keratitis in an animal model
Authors: Rayamajhee Binod , Willcox Mark , Henriquez Fiona L. , Vijay Ajay Kumar , Petsoglou Constantinos , Shrestha Gauri Shankar , Peguda Hari Kumar , Carnt Nicole 
Published: January 2024

Background
Acanthamoeba is an environmental host for various microorganisms. Acanthamoeba is also becoming an increasingly important pathogen as a cause of keratitis. In Acanthamoeba keratitis (AK), coinfections involving pathogenic bacteria have been reported, potentially attributed to the carriage of microbes by Acanthamoeba. This study assessed the presence of intracellular bacteria in Acanthamoeba species recovered from domestic tap water and corneas of two different AK patients and examined the impact of naturally occurring intracellular bacteria within Acanthamoeba on the severity of corneal infections in rats.

Methodology/Principal findings
Household water and corneal swabs were collected from AK patients. Acanthamoeba strains and genotypes were confirmed by sequencing. Acanthamoeba isolates were assessed for the presence of intracellular bacteria using sequencing, fluorescence in situ hybridization (FISH), and electron microscopy. The viability of the bacteria in Acanthamoeba was assessed by labelling with alkyne–functionalized D–alanine (alkDala). Primary human macrophages were used to compare the intracellular survival and replication of the endosymbiotic Pseudomonas aeruginosa and a wild type strain. Eyes of rats were challenged intrastromally with Acanthamoeba containing or devoid of P. aeruginosa and evaluated for the clinical response. Domestic water and corneal swabs were positive for Acanthamoeba. Both strains belonged to genotype T4F. One of the Acanthamoeba isolates harboured P. aeruginosa which was seen throughout the Acanthamoeba’s cytoplasm. It was metabolically active and could be seen undergoing binary fission. This motile strain was able to replicate in macrophage to a greater degree than strain PAO1 (p<0.05). Inoculation of Acanthamoeba containing the intracellular P. aeruginosa in rats eyes resulted in a severe keratitis with increased neutrophil response. Acanthamoeba alone induced milder keratitis.

Conclusions/Significance
Our findings indicate the presence of live intracellular bacteria in Acanthamoeba can increase the severity of acute keratitis in vivo. As P. aeruginosa is a common cause of keratitis, this may indicate the potential for these intracellular bacteria in Acanthamoeba to lead to severe polymicrobial keratitis.
Duhuo Jisheng Decoction regulates intracellular zinc homeostasis by enhancing autophagy via PTEN/Akt/mTOR pathway to improve knee cartilage degeneration
Authors: Wang Ye-Hui , Zhou Yi , Gao Xiang , Sun Sheng , Xie Yi-Zhou , Hu You-Peng , Fu Yang , Fan Xiao-Hong , Xie Quan 
Published: January 2024

Background
Articular cartilage and cartilage matrix degradation are key pathological changes occurring in the early stage of knee osteoarthritis (KOA). However, currently, there are limited strategies for early prevention and treatment of KOA. Duhuo Jisheng Decoction (DHJSD) is a formula quoted in Bei Ji Qian jin Yao Fang, which was compiled by Sun Simiao in the Tang Dynasty of China. As a complementary therapy, it is widely used to treat early-stage KOA in China; however, its mechanism has not been completely elucidated.

Objective
This study investigated the potential role of DHJSD in preventing cartilage degradation and the underlying mechanism.

Methods
A rat model of KOA model was established via the Hulth method. Subsequently, 25 rats were randomized into sham (saline), model control (saline), high-DHJSD (1.9g/mL of DHJSD), medium-DHJSD (1.2g/mL of DHJSD), and low-DHJSD groups (0.6g/mL of DHJSD). After 4 weeks of treatment, all rats were sacrificed and the severity of the cartilage degeneration was evaluated by a series of histological methods. The autophagosome was observed using transmission electron microscopy, and the related functional proteins were detected by the western blotting and real-time polymerase chain reaction. Next, the mechanism by which DHJSD improves knee cartilage degeneration was further clarified the in vitro by gene silencing technology combined with a series of functional experiments. The proteins levels of PTEN, Akt, p-Akt, mTOR, and p-mTOR, as well as the marker proteins of autophagy and apoptosis were determined. Zinc levels in chondrocytes were determined using inductively coupled plasma mass spectrometry.

Results
Histopathological staining revealed that DHJSD had a protective effect on the cartilage. DHJSD increased autophagosome synthesis and the expression of autophagy proteins LC3 and Beclin-1 in chondrocytes. Moreover, it reduced the phosphorylation levels of Akt and mTOR and the levels of zinc, MMP-13, Bax, and Bcl-2. Following PTEN silencing, this DHJSD-mediated reduction in Akt and mTOR phosphorylation and Bax, Bcl-2, and zinc levels were further decreased; in addition, DHJSD-mediated increase in LC3 and Beclin-1 levels was decreased.

Conclusion
DHJSD inhibits the Akt/mTOR signaling pathway by targeting PTEN to promote autophagy in chondrocytes, which may help reduce MMP-13 production by regulating zinc levels in chondrocytes.
Community perceptions and experiences on caring for the premature babies in Arba Minch health and demographic surveillance site, southern Ethiopia: Interpretive Husserlian phenomenological study
Authors: Shibiru Shitaye , Endashaw Gesila , Kassa Mekidim , Ayele Gistane , Bante Agegnehu , Mersha Abera 
Published: January 2024

Introduction
Premature birth is the leading cause of under-5 child mortality, accounting for 18%. More attention is needed for premature babies. Myths, misconceptions, and negative attitudes stigmatize premature births and slow prevention and care efforts. In Ethiopia, studies have been conducted on premature birth and its risk factors. However, there is a lack of evidence regarding the perceived causes of premature birth, caring aspects, and community challenges. This qualitative study aims to address these research gaps.

Methods
This interpretive Husserlian phenomenological study was conducted from January 1–30, 2022. Purposive sampling was used to recruit 32 participants for focus group discussions and 10 participants for in-depth interviews. Participants included women, grandmothers, grandfathers, men, traditional birth attendants, and traditional healers. Interview and focus group data were analyzed using NVivo 12 Plus software and a thematic content analysis approach.

Results
In this study, the participants recognized premature babies by physical features such as transparent and bloody bodies, small and weak bodies, a limited range of motion, and bizarre behaviors. They perceived the causes of premature birth to be being young, carrying heavily loaded materials, accidents, illnesses, sin, social influence, and witchcraft. Participants provide warmth to premature babies by wearing cotton wool, making skin-to-skin contact, exposing to sunlight, and wrapping them in clothes. They also feed them boiled alcohol, muk, and formula, as well as fresh cow milk and butter. They frequently bathe the babies, wash and change their clothes, limit visits, and provide physical protection. The main challenges that the women faced were difficulty feeding and bathing the babies, limited social participation, psychosocial and economic impact, spirituality, and husband negligence.

Conclusions
The community has a gap in providing care for premature babies, and women with premature babies face many challenges. Therefore, we need to raise awareness of accurate information about the causes and care of premature babies, and we need to support women who have premature babies.
HIV prevalence and awareness among adults presenting for enrolment into a study of people at risk for HIV in Kisumu County, Western Kenya
Authors: Sing’oei Valentine , Nwoga Chiaka , Yates Adam , Owuoth John , Otieno June , Broach Erica , Li Qun , Hassen Zebiba , Imbach Michelle , Milazzo Mark , Mebrahtu Tsedal , Robb Merlin L. , Ake Julie A. , Polyak Christina S. , Crowell Trevor A. ,   on behalf of the RV393 Study Group
Published: January 2024

Introduction
Despite declines in new HIV diagnoses both globally and in Kenya, parts of Western Kenya still report high HIV prevalence and incidence. We evaluated HIV prevalence to inform the development of policies for strategic and targeted HIV prevention interventions.

Methods
Adult participants aged 18–35 years were recruited in Kisumu County and screened for HIV for a prospective HIV incidence cohort. Questionnaires assessed HIV-associated risk behaviors. Participants who tested positive for HIV were disaggregated into groups based on prior knowledge of their HIV status: previously-diagnosed and newly-diagnosed. In separate analyses by prior knowledge, robust Poisson regression was used to estimate prevalence ratios (PRs) and 95% confidence intervals (CIs) for factors potentially associated with a positive HIV test in each group, as compared to participants without HIV.

Results
Of 1059 participants tested for HIV, 196 (18.5%) had a positive HIV test. Among PLWH, 78 (39.8%) were newly diagnosed with HIV at screening. After adjusting for other variables, previously-diagnosed HIV was more common among females than males (PR 2.70, 95%CI 1.69–4.28), but there was no observed sex difference in newly-diagnosed HIV prevalence (PR 1.05, 95%CI 0.65–1.69). Previously-diagnosed HIV was also more common among people reporting consistent use of condoms with primary sexual partners as compared to inconsistent condom use (PR 3.19, 95%CI 2.09–4.86), but newly-diagnosed HIV was not associated with such a difference between consistent and inconsistent condom use (PR 0.73, 95%CI 0.25–2.10).

Conclusion
Prevalence of newly-diagnosed HIV was high, at approximately 8% of participants, and not statistically different between genders, highlighting the need for improved HIV case finding regardless of sex. The higher prevalence of previously-diagnosed HIV in female participants may reflect higher rates of HIV testing through more encounters with the healthcare system. Higher prevalence of consistent condom use amongst those previously-diagnosed suggests behavioral change to reduce HIV transmission, a potential benefit of policies to facilitate earlier HIV diagnosis.
QuantiFERON Gold-In-Tube for the diagnosis of mycobacterial tuberculosis infection in children under 5 years of age: A systematic review and meta-analysis
Authors: Volkman Thomas , Muruganandah Visai , Graham Hamish , Tosif Shidan , Stokes Simon , Ranganathan Sarath 
Published: January 2024

Background
Previous meta-analysis regarding the performance of QuantiFERON Gold-In-Tube in children have yielded contrasting results. Emerging data in children younger than 5 years of age necessitates a new analysis.

Methods
Systematic searches were conducted of MedLINE, EMBASE and Cochrane databases between 1998–2023. Pooled estimates of sensitivities and specificities of QFT-GIT compared to tuberculin skin test (TST) were calculated. The Kappa (k) coefficient was calculated for each study to determine the degree of congruence between TST and QFT-GIT results. Studies including patients co-infected with HIV or other immune compromising conditions or those treated with anti-tubercular treatment were excluded.

Results
Seventeen studies (4335 patients) were included in quantitative analysis. All studies were conducted in middle to high income countries. They were conducted across 14 countries and 4 studies in countries with high TB incidence. The pooled sensitivity, specificity and DOR were 0.45 (0.42–0.48), 0.96 (0.96–0.97) and 18.84 (7.33–48.41) respectively. The ability of QFT-GIT to discriminate with disease and no disease was “good” as demonstrated by a summary receiver operating characteristic curve with area under curve of 0.7812. The average Kappa (k) co-efficient was 0.501 with a wide variety of values between studies (0.167 to 0.800).

Conclusion
The findings of this meta-analysis support the judicious use of QFT-GIT in children 5 years and under, with caution as a sole test to exclude Tuberculosis in this age group. The heterogeneity and methodological quality of diagnostic studies limits the generalisability of results.