BioMed Research International最新文献

{"title":"Physicochemical Characterization and Evaluation of the Suspending Properties of <i>Boswellia papyrifera</i> Gum in Metronidazole Benzoate Suspension.","authors":"Gebremariam Woldu, Tsegay Brhane, Gebre Teklemariam Demoz","doi":"10.1155/2024/8899359","DOIUrl":"https://doi.org/10.1155/2024/8899359","url":null,"abstract":"<p><p><b>Background:</b> Currently, many natural gums are extensively utilized as suspending agents in the formulation of pharmaceutical suspensions. They are easily available, nontoxic, biodegradable, and cost-effective to be used as pharmaceutical excipients. <b>Objective:</b> The present study was aimed at physicochemical characterization and evaluation of the suspending capacity of <i>Boswellia papyrifera</i> gum (BPG) in comparison with sodium carboxy methyl cellulose (SCMC) and tragacanth gum (TG). <b>Methods:</b> The extracted and powdered BPG was subjected to physicochemical properties such as micromeritics, solubility, swelling power, ash value, moisture content, conductivity, pH, and apparent viscosity using standard methods. Metronidazole benzoate suspensions were formulated using various concentrations of BPG, SCMC, and TG (1%-5% <i>w</i>/<i>v</i>). The apparent viscosity, flow rate, sedimentation volume, redispersibility number, pH, and drug content were studied as assessment parameters. <b>Results:</b> The micromeritic studies revealed that BPG exhibited good flow properties. There was also a significant increase in solubility and swelling power of the gum as a function of temperature. The gum had 2.78% ash value and 4.32% moisture content. Conductivity and apparent viscosity of the gum were found to be increased with concentration (<i>p</i> < 0.05). However, the apparent viscosity of BPG was decreased with shear rate (<i>p</i> < 0.05), rendering a pseudoplastic flow property of the gum, which is an ideal characteristic of suspending agents. The suspending capacity of the BPG was found to be comparable to SCMC, but higher than TG. Thus, it can be concluded that BPG could be used as the best alternative to natural and synthetic suspending agents.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"8899359"},"PeriodicalIF":2.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11436277/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142341091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toxicological Evaluation of a Polyherbal Formulation (18KHT01) and Validation of UPLC-DAD Method for Quality Control.","authors":"Prakash Raj Pandeya, Ramakanta Lamichhane, Gopal Lamichhane, Kyung-Hee Lee, Hyun-Ju Jung","doi":"10.1155/2024/1767618","DOIUrl":"https://doi.org/10.1155/2024/1767618","url":null,"abstract":"<p><p><b>Background:</b> 18KHT01 is a novel synergistic composition of <i>Quercus acutissima</i>, <i>Camellia sinensis</i>, <i>Geranium thunbergii</i>, and a small portion of <i>Citrus limon</i>. Our previous report demonstrated that the 18KHT01 exhibits potent antiobesity effects, with synergistic antioxidant, antiadipogenic, and antiobesity activities in diet-induced obese mice. This study explores the toxicity profile and quality control parameters of the 18KHT01 formulation. <b>Methods:</b> Broad-spectrum acute and subacute oral toxicity studies were performed using male and female ICR mice. In order to simultaneous analysis of the 18KHT01 formulation, an ultraperformance liquid chromatography coupled with a diode array detector (UPLC-DAD) method was developed and validated using six marker compounds. <b>Results:</b> Acute oral toxicity evaluation of 18KHT01, administered at single high doses of 2, 2.5, 3, and 5 g/kg, identified 2 g/kg as the no-observed adverse effect level (NOAEL). The LD50 (50% lethal dose) and LD100 (100% lethal dose) of 18KHT01 for male ICR mice were 3.99 and 7.77 g/kg, and those for the female mice were 2.94 and 4.70 g/kg, respectively. In addition, a 30-day repeated dose oral subacute toxicity evaluation indicated that 18KHT01 is safe below 500 mg/kg/day for long-term administration in ICR mice of either sex. UPLC-DAD method validation revealed that each calibration curve for the marker compounds showed good linearity, as well as the validation parameters such as precision, specificity, and accuracy met the acceptance criteria. <b>Conclusion:</b> The present study evidenced the toxicological profile of 18KHT01 polyherbal formulation in mice as well as developed a simple, rapid, and accurate chromatographic method for quality control.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"1767618"},"PeriodicalIF":2.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11427720/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142341101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"APC and ZBTB2 May Mediate M2 Macrophage Infiltration to Promote the Development of Renal Fibrosis: A Bioinformatics Analysis.","authors":"Jianling Song, Ben Ke, Xiangdong Fang","doi":"10.1155/2024/5674711","DOIUrl":"10.1155/2024/5674711","url":null,"abstract":"<p><p><b>Background and Purpose:</b> The continuous accumulation of M2 macrophages may potentially contribute to the development of kidney fibrosis in chronic kidney disease (CKD). The purpose of this study was to analyze the infiltration of M2 macrophages in uremic patients and to seek new strategies to slow down the progression of renal fibrosis. <b>Methods:</b> We conducted a comprehensive search for expression data pertaining to uremic samples within the Gene Expression Omnibus (GEO) database, encompassing the time frame from 2010 to 2022. Control and uremic differentially expressed genes (DEGs) were identified. Immune cell infiltration was investigated by CIBERSORT and modules associated with M2 macrophage infiltration were identified by weighted gene coexpression network analysis (WGCNA). Consistent genes were identified using the least absolute shrinkage and selection operator (LASSO) and selection and visualization of the most relevant features (SVM-RFE) methods to search for overlapping genes. Receiver operating characteristic (ROC) curves were examined for the diagnostic value of candidate genes. Quantitative real-time PCR (qPCR) examined the expression levels of candidate genes obtained from uremic patients in M2 macrophage. <b>Results:</b> A total of 1298 DEGs were identified within the GSE37171 dataset. Significant enrichment of DEGs was observed in 20 biological processes (BP), 19 cellular components (CC), 6 molecular functions (MF), and 70 Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways. CIBERSORT analysis observed a significant increase in B-cell memory, dendritic cell activation, M0, M1, M2, and plasma cell numbers in uremic samples. We identified the 10 most interrelated genes. In particular, adenomatous polyposis coli (APC) and zinc finger and BTB structural domain 2 (ZBTB2) were adversely associated with the infiltration of M2 macrophages. Importantly, the expression levels of APC and ZBTB2 were far lower in M2 macrophages from uremic patients than those in healthy individuals. <b>Conclusion:</b> The development of renal fibrosis may be the result of M2 macrophage infiltration promoted by APC and ZBTB2.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"5674711"},"PeriodicalIF":2.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11424844/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142341088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational Mutagenesis and Inhibition of <i>Staphylococcus aureus</i> AgrA LytTR Domain Using Phenazine Scaffolds: Insight From a Biophysical Study.","authors":"Prince Manu, Prisca Baah Nketia, Priscilla Osei-Poku, Alexander Kwarteng","doi":"10.1155/2024/8843954","DOIUrl":"10.1155/2024/8843954","url":null,"abstract":"<p><p>Biofilm formation by <i>Staphylococcus aureus</i> is a major challenge in clinical settings due to its role in persistent infections. The AgrA protein, a key regulator in biofilm development, is a promising target for therapeutic intervention. This study investigates the antibiofilm potential of halogenated phenazine compounds by targeting AgrA and explores their molecular interactions to provide insights for drug development. We employed molecular docking, molecular dynamics simulations, and computational mutagenesis to evaluate the binding of halogenated phenazine compounds (C1 to C7, HP, and HP-14) to AgrA. Binding free energy analysis was performed to assess the affinity of these compounds for the AgrA-DNA complex. Additionally, the impact of these compounds on AgrA's structural conformation and salt bridge interactions was examined. The binding-free energy analysis revealed that all compounds enhance binding affinity compared to the Apo form of AgrA, which has a <i>Δ</i>G_bind of -80.75 kcal/mol. The strongest binding affinities were observed with compounds C7 (-113.84 kcal/mol), HP-14 (-115.23 kcal/mol), and HP (-112.28 kcal/mol), highlighting their effectiveness. Molecular dynamics simulations demonstrated that these compounds bind at the hydrophobic cleft of AgrA, disrupting essential salt bridge interactions between His174-Glu163 and His174-Glu226. This disruption led to structural conformational changes and reduced DNA binding affinity, aligning with experimental findings on biofilm inhibition. The halogenated phenazine compounds effectively inhibit biofilm formation by targeting AgrA, disrupting its DNA-binding function. The study supports the potential of these compounds as antibiofilm agents and provides a foundation for rational drug design targeting the AgrA-DNA interaction. Future research should focus on further optimizing these lead compounds and exploring additional active sites on AgrA to develop novel treatments for biofilm-associated infections.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"8843954"},"PeriodicalIF":2.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11424843/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142341090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Availability and Price Variations of Commonly Used Cardiovascular Medicines at Community and Hospital Pharmacies in Gondar Town, Northwest Ethiopia.","authors":"Liknaw Workie Limenh, Tewodros Ayalew Tessema, Ashenafi Kibret Sendekie, Wudneh Simegn, Wondim Ayenew, Melese Legesse Mitku, Yeniewa Kerie Anagaw, Asmamaw Emagn Kasahun","doi":"10.1155/2024/6551639","DOIUrl":"https://doi.org/10.1155/2024/6551639","url":null,"abstract":"<p><p><b>Background:</b> Access to cardiovascular medications is severely hampered by their unavailability and high cost, particularly for the poorest households in developing nations. The availability and price range of cardiovascular medications are significantly limited in both hospital and community pharmacies. <b>Objectives:</b> The aim of this study is to assess the availability and price variations of commonly used cardiovascular medicines in hospital pharmacies in Gondar Town, northwest Ethiopia. <b>Methods:</b> From July 13 to August 6, 2022, a mixed cross-sectional and simulated client survey was carried out at two hospital and 13 community pharmacies in Gondar Town. The analysis and data entry were performed using SPSS Version 25 and EpiData Version 4.2, respectively. The availability and pricing variations of the medications are given as percentages. The significance was examined using paired <i>t</i> tests. <b>Results:</b> On average, community retail pharmacies offered 33.22% of CVD drugs. Aspirin (81 mg), amlodipine (5 mg), atorvastatin (20 mg), and hydrochlorothiazide (25 mg) were the most readily available drugs in community pharmacies. Overall, 28.00% of the hospital pharmacies had available CVD medicines during the course of our analysis. The average cost for the 25 CVD medications in hospital pharmacies was $0.699, with a standard deviation (SD) of 1.513, which was less than the cost at community pharmacies ($2.741 with an SD of 6.015) (<i>p</i> = 0.045). <b>Conclusion:</b> CVD medications were more available in community pharmacies than in hospital pharmacies, although there were fewer CVD medications available than recommended by the WHO/HAI (80%) in both hospital and community pharmacies. There was a statistically significant difference between the two prices. Compared to that at hospital pharmacies, the mean price at community pharmacies was greater.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"6551639"},"PeriodicalIF":2.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11421931/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142341089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalence of Gastrointestinal Parasitic Infections and Associated Risk Factors Among Secondary School Students in Wonji Shoa, Adama District, East Shoa Zone, Oromia Region, Ethiopia.","authors":"Abera Adugna, Tilahun Yohannes, Solomon Tesfaye","doi":"10.1155/2024/5520924","DOIUrl":"https://doi.org/10.1155/2024/5520924","url":null,"abstract":"<p><p>Intestinal parasitic infections (IPIs) remain a significant contributor to morbidity and mortality globally, particularly in developing countries such as Ethiopia. Periodic assessments of IPI prevalence are essential prerequisite for effective control measures. Therefore, this cross-sectional study is aimed at determining the prevalence of gastrointestinal parasitic infections and associated risk factors among schoolchildren at Wonji Shoa Secondary School, East Shoa Zone, Adama district, Oromia region, Ethiopia, between January and June 2022. A simple random stratified sampling technique was employed to select participants. Sociodemographic and risk factor data were collected using a structured questionnaire. Stool samples were examined to identify parasites. Data were analyzed using SPSS version 20. Descriptive statistics, chi-square tests, and logistic regression were conducted to assess associations between variables and then the strength of the association. A <i>p</i> value < 0.05 was considered statistically significant. Of the 403 selected students, 330 completed the study that makes 81.89% response success. The overall IPI prevalence was 16.66% (55/330), with a higher prevalence among males (60%, 33/55) than females (40%, 22/55). Five parasite species were identified: two protozoa (<i>Entamoeba histolytica</i> and <i>Giardia lamblia</i>) with a combined prevalence of 9.70% (32/330) and three helminths (<i>Ascaris lumbricoides</i>, <i>Hymenolepis nana</i>, and <i>Taenia</i> spp.) with a combined prevalence of 6.97% (23/330). Cysts were detected in 62.5% of <i>E. histolytica</i> cases (15/24), and eggs were detected in 76.92% of <i>A. lumbricoides</i> cases (10/13). The study revealed a substantial IPI prevalence (16.66%) among the students. This finding underscores the need for effective prevention and control strategies. The predominance of parasitic infections among males is notable requiring further investigation of the factors. The identification of multiple parasite species indicates a complex epidemiological scenario. The presence of protozoan cysts and helminthic eggs highlights the potential for fecal-oral transmission and the importance of improved sanitation and hygiene practices.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"5520924"},"PeriodicalIF":2.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11421935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142341092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antioxidant Properties and Vasorelaxant Mechanism of Aqueous Extract <i>of Ricinodendron heudelotii</i> (Euphorbiaceae).","authors":"Jacquy Joyce Wanche Kojom, Calvin Zangueu Bogning, Edwige Laure Lappa, Christelle Stéphanie Sonfack, Augustine Nkojap Kuinze, Gisèle Etamé-Loé, Alain Bertrand Dongmo","doi":"10.1155/2024/3435974","DOIUrl":"10.1155/2024/3435974","url":null,"abstract":"<p><p><i>Ricinodendron heudelotii</i> is a plant of the Euphorbiaceae family, used in traditional medicine to treat numerous diseases, including high blood pressure. The aim of this study is to evaluate the antioxidant and vasorelaxant effects of the aqueous extract of the stem bark of <i>R. heudelotii</i>. The pharmacological studies were carried out using the aqueous extract obtained by infusion. The antioxidant capacity of <i>R. heudelotii</i> was assessed by in vitro tests with DPPH (2,2-diphenyl-1-picryl-hydrazyl), ABTS (2,2'-azino-bis (3-ethylbenz-thiazoline-6-sulfonic acid), iron-reducing capacity (FRAP), and inhibition of nitric oxide (NO) release. In vitro studies, the aortic rings obtained from adult Wistar albino rats of both sexes were used to determine the vasorelaxant effects of the extract of <i>R. heudelotii</i> on the NO and prostacyclin (PGI2) pathways as well as its involvement on various potassium channels were determined on intact or naked fragments of rat aorta precontracted with phenylephrine (10^-6 M) or KCl (60 mM). The aqueous extract of <i>R. heudelotii</i> exhibited a remarkable DPPH (EC₅₀: 1.68 <i>μ</i>g/mL) and ABTS (EC₅₀: 106.30 <i>μ</i>g/mL) and nitric oxide (53.71% inhibition at 1000 <i>μ</i>g/mL) radical scavenging activities as well as reducing power (absorbance of 1.56 at 1000 <i>μ</i>g/mL). The nitric oxide inhibitor, N_G-nitro-L-arginine methyl ester (L-NAME), and prostacyclin inhibitor, indomethacin, significantly attenuated the vasodilatory effect of <i>R. heudelotii</i>. Tetraethylammonium could not inhibit the vasodilatory effect of the extract, unlike glibenclamide and barium chloride. <i>Ricinodendron heudelotii</i> extract possesses antioxidant properties and vasorelaxing effect linked to endothelium-related factors, and this relaxation was partially mediated mainly through the inhibition of K_ir and K_ATP channels.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"3435974"},"PeriodicalIF":2.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11419840/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142307092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quality Evaluation of Locally Manufactured Paracetamol Tablets in East Africa.","authors":"Gerald Marisa, James Kapala, Tanga Mafuru, Raphael Matinde, Emmanuel Kimaro, Eliangiringa Kaale","doi":"10.1155/2024/9437835","DOIUrl":"10.1155/2024/9437835","url":null,"abstract":"<p><p><b>Background:</b> Paracetamol, also known as acetaminophen, is categorized as an analgesic and antipyretic medication and is available as over the counter (OTC) medication. It is commonly used in conditions associated with pain and fever. There is a tendency for community to prefer using imported paracetamol tablets from Europe and United States than from Asia and Africa worrying of the quality of the products. Safety, effectiveness, and efficacy of a medicine can be guaranteed when its quality is reliable; however, there is limited data on the quality of locally manufactured paracetamol tablets, thus necessitating this study. <b>Aim:</b> This study is aimed at assessing the quality of paracetamol tablets 500 mg manufactured by local companies by evaluating their physical parameters, assay results, and dissolution profiles. The compliance of these tablets with the specifications outlined in the British Pharmacopoeia (BP) was analyzed. Additionally, a comparative dissolution test was conducted to assess dissolution profile for innovator product and generics. <b>Method:</b> Five different brands from East African countries with 76 tablets from each brand were compared with the innovator product regarding weight variation, hardness, friability, assay, and dissolution test based on the BP specifications. <b>Results and discussion:</b> All samples of paracetamol tablets 500 mg from the local manufacturers in this study met the specifications set by the BP for physical parameters, including weight variation, friability, hardness, and disintegration tests. The weight variation test, directly related to drug content variation, demonstrated compliance within the acceptable deviation of 5%. Similarly, the assay test, which determines the concentration of the active pharmaceutical ingredient (API), confirmed that all samples complied with the acceptable concentration range of 90%-110% for paracetamol. The dissolution test, assessing the percentage release of the API within a specified time, demonstrated that at 15 min, two samples (diodol and enamol) exhibited lower concentration releases than the required 80%, indicating potential delays in their bioavailability and onset of action. <b>Conclusion:</b> To conclude, all samples had good quality and they can be used for their therapeutic purposes.</p>","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"2024 ","pages":"9437835"},"PeriodicalIF":2.6,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11416170/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142280151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of Lactic Acid Bacteria Isolated From Rotting Oranges and Use of Agropastoral Processing By-products as Carbon and Nitrogen Sources Alternative for Lactic Acid Production.","authors":"Romial Joel Ngouénam,Ghadir Nofal,Sanjukta Patra,Bilkissou Njapndounke,Edith Marius Foko Kouam,Pierre Marie Kaktcham,François Zambou Ngoufack","doi":"10.1155/2024/4264229","DOIUrl":"https://doi.org/10.1155/2024/4264229","url":null,"abstract":"This study investigated the ability of lactic acid bacteria (LAB) isolated from oranges to use fish by-products (FB) and chicken by-products (CB) as nitrogen sources alternative to yeast extract for lactic acid (LA) production in a papaya by-product medium as a carbon source. Once the fermentation agents had been isolated, they were subjected to biochemical and molecular characterization. Inexpensive nitrogen sources, precisely CB and FB, were prepared, freeze-dried, and yield evaluated. Also, before to the fermentation experiments, the Total Kjehdahl Nitrogen (TKN) of these by-products and that of the yeast extract were determined. Then, three production media differing in terms of nitrogen source were formulated from these nitrogen sources. From the 22 LAB isolated from orange, two isolates of interest (NGO25 and NGO23) were obtained; all belonging to the Lactiplantibacillus plantarum species based on 16S rRNA gene sequencing. Furthermore, the production yield powder obtained after lyophilization of 1 L of CB and FB surpernatant were, respectively, 16.6 g and 12.933 g. The TKN of different nitrogen sources powder were 71.4 ± 0.000% DM (FB), 86.145 ± 0.001% DM (CB), and 87.5 ± 0.99% DM (yeast extract). The best kinetic parameters of LA production (LA (g/L): 31.945 ± 0.078; volumetric productivity (g/L.h): 1.331 ± 0.003; LA yield (mg/g) 63.89 ± 0.156; biomass (g/L) 7.925 ± 0.035; cell growth rate (g/L.h): 0.330 ± 0.001) were recorded by Lactiplantibacillus plantarum NGO25 after 24 h of fermentation. The latter data were obtained in the production medium containing CB as nitrogen sources. In addition, this production medium cost only $0.152 to formulate, compared to yeast extract which required $1.692 to formulate. Thus, freeze-dried CB can be used as an alternative to yeast extract in large-scale production of LA.","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"10 1","pages":"4264229"},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mental Health Consequences of the COVID-19 Outbreak Among Emergency Department Healthcare Workers.","authors":"Marion Douplat,Fabien Subtil,Anne Termoz,Laurent Jacquin,Frédéric Verbois,Veronique Potinet,Romain Hernu,Verena Landel,Stéphanie Mazza,Julien Berthiller,Julie Haesebaert,Karim Tazarourte","doi":"10.1155/2024/8871959","DOIUrl":"https://doi.org/10.1155/2024/8871959","url":null,"abstract":"Study Objective: The present study is aimed at providing an assessment of the changes in burnout, job strain, isostrain, sleepiness, and fatigue levels over time and identifying factors associated with these symptoms among healthcare workers in French emergency departments (EDs). Method: We conducted a prospective, multicenter study in four EDs and an emergency medical service. Participants completed questionnaires at inclusion and at 90 days to assess burnout, job strain, isostrain, sleepiness, and fatigue. Results: A total of 211 respondents (43.5%) completed the questionnaires at inclusion. At the beginning of the study, 84 (40.8%) participants presented symptoms of burnout, 86 (43.2%) had symptoms of job strain, and 58 (29.4%) of isostrain. Forty-two (20.1%) healthcare workers presented symptoms of sleepiness, and 8 (3.8%) had symptoms of fatigue. We found that symptoms of burnout were more frequent for healthcare workers with a previous psychiatric history (55.3% vs. 39.1%, p = 0.02) and were lower among participants who had at least one dependent child (33.1% vs. 48.3%, p = 0.013). Symptoms of job strain were higher among administrative staff compared to physicians (55.6% vs. 28.7%, p = 0.01) and among healthcare workers with managerial responsibilities compared to those without (45.6% vs. 28.8%, p = 0.015). Symptoms of isostrain were higher among administrative staff (42.3%) compared to paramedics (34.1%) and physicians (19.8%, p = 0.026). Conclusion: We identified that potential factors associated with the emergence of symptoms of burnout and job strain are suggested, underlining several areas of improvement for the prevention against mental health disorders in the specific population of ED healthcare workers. Trial Registration: ClinicalTrials.gov identifier: NCT04383886.","PeriodicalId":9007,"journal":{"name":"BioMed Research International","volume":"41 1","pages":"8871959"},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142254413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}