Current research in physiology最新文献

{"title":"Cell-based homologous expression system for in-vitro characterization of environmental effects on transmembrane peptide transport in fish","authors":"Pazit Con ,&nbsp;Jens Hamar ,&nbsp;Jakob Biran ,&nbsp;Dietmar Kültz ,&nbsp;Avner Cnaani","doi":"10.1016/j.crphys.2024.100118","DOIUrl":"10.1016/j.crphys.2024.100118","url":null,"abstract":"<div><p>All organisms encounter environmental changes that lead to physiological adjustments that could drive evolutionary adaptations. The ability to adjust performance in order to cope with environmental changes depends on the organism's physiological plasticity. These adjustments can be reflected in behavioral, physiological, and molecular changes, which interact and affect each other. Deciphering the role of molecular adjustments in physiological changes will help to understand how multiple levels of biological organization are synchronized during adaptations. Transmembrane transporters, which facilitate a cell's interaction with its surroundings, are prime targets for molecular studies of the environmental effects on an organism's physiology. Fish are subjected to environmental fluctuations and exhibit different coping mechanisms. To study the molecular adjustments of fish transporters to their external surrounding, suitable experimental systems must be established. The Mozambique tilapia (<em>Oreochromis mossambicus</em>) is an excellent model for environmental stress studies, due to its extreme salinity tolerance. We established a homologous cellular-based expression system and uptake assay that allowed us to study the effects of environmental conditions on transmembrane transport. We applied our expression system to investigate the effects of environmental conditions on the activity of PepT2, a transmembrane transporter critical in the absorption of dietary peptides and drugs. We created a stable, modified fish cell-line, in which we exogenously expressed the tilapia PepT2, and tested the effects of water temperature and salinity on the uptake of a fluorescent di-peptide, β-Ala-Lys-AMCA. While temperature affected only Vmax, medium salinity had a bi-directional effect, with significantly reduced Vmax in hyposaline conditions and significantly increased Km in hypersaline conditions. These assays demonstrate the importance of suitable experimental systems for fish ecophysiology studies. Furthermore, our <em>in-vitro</em> results show how the effect of hypersaline conditions on the transporter activity can explain expression shifts seen in the intestine of saltwater-acclimated fish, emphasizing the importance of complimentary studies in better understanding environmental physiology. This research highlights the advantages of using homologous expression systems to study environmental effects encountered by fish, in a relevant cellular context. The presented tools and methods can be adapted to study other transporters <em>in-vitro</em>.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100118"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000026/pdfft?md5=87c94ed733d490da908a966953cd895c&pid=1-s2.0-S2665944124000026-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139392587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of a cajuína hydroelectrolytic drink on the physical performance and hydration status of recreational runners","authors":"Valmir Oliveira Silvino ,&nbsp;Mara Cristina Carvalho Batista ,&nbsp;Manoel Miranda Neto ,&nbsp;André Luiz Berzoti Ribeiro ,&nbsp;Paulo Pedro do Nascimento ,&nbsp;Esmeralda Maria Lustosa Barros ,&nbsp;Rayane Carvalho de Moura ,&nbsp;Karen Christie Gomes Sales ,&nbsp;Luanne Morais Vieira Galvão ,&nbsp;Lívio César Cunha Nunes ,&nbsp;Alessandra Durazzo ,&nbsp;Alexandre Sérgio Silva ,&nbsp;Marcos Antonio Pereira dos Santos","doi":"10.1016/j.crphys.2024.100119","DOIUrl":"https://doi.org/10.1016/j.crphys.2024.100119","url":null,"abstract":"<div><p>Cajuína is a processed drink derived from cashew and is widely consumed in the northeast region of Brazil. This study evaluated the effect of a cajuína-based hydroelectrolytic drink on the aerobic performance and hydration status of recreational runners. Seventeen males (31.9 ± 1.6 years, 51.0 ± 1.4 ml/kg/min) performed three time-to-exhaustion running sessions on a treadmill at 70% VO₂max, ingesting cajuína hydroelectrolytic drink (CJ), high carbohydrate commercial hydroelectrolytic drink (CH) and mineral water (W) every 15 min during the running test. The participants ran 80.3 ± 8.4 min in CJ, 70.3 ± 6.8 min in CH and 71.8 ± 6.9 min in W, with no statistical difference between procedures. Nevertheless, an effect size of η² = 0.10 (moderate) was observed. No statistical difference was observed in the concentrations of sodium, potassium, and osmolality in both serum and urine between the three conditions. However, the effect size was moderate (urine sodium) and high (serum sodium, potassium, and osmolality). Urine specific gravity, sweating rate and heart rate were not significantly different between drinks. The cajuína-based hydroelectrolytic drink promotes similar effects compared to commercial hydroelectrolytic drink and water, considering specific urine gravity, heart rate, sweating, and time to exhaustion in recreational runners.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100119"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000038/pdfft?md5=f3ece7ae8b06641a30b0fc016534eb92&pid=1-s2.0-S2665944124000038-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139709436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Immediate effects of passion fruit juice supplementation on working ability and attention in healthy participants","authors":"Piyapong Prasertsri ,&nbsp;Kittiya Sinnitithavorn ,&nbsp;Chonlakan Raroengjai ,&nbsp;Rujirat Phichayaworawit ,&nbsp;Pimonpan Taweekarn ,&nbsp;Kunavut Vannajak ,&nbsp;Uraiporn Booranasuksakul","doi":"10.1016/j.crphys.2024.100120","DOIUrl":"10.1016/j.crphys.2024.100120","url":null,"abstract":"<div><p>This study investigated the effects of a single consumption of passion fruit juice (PFJ) on working ability and attention. It included 14 healthy participants aged 20–30 years. Participants randomly consumed either placebo or 50% PFJ at 3.5 mL/kg body mass. Each intervention was divided into two phases (before and after consumption). Before consumption, the participants underwent blood glucose, blood pressure, and heart rate examinations. Then, working ability and attention were evaluated. Thereafter, the blood glucose, blood pressure, and heart rate were repeatedly examined. Next, the participants completed consumption. After consumption, the participants underwent the same experiments performed before consumption. The total working ability scores after consumption were significantly high in both interventions (<em>P</em> &lt; 0.05). However, PFJ intervention had a significantly higher working ability at 1, 2, 3, 4, and 5 min than placebo intervention (<em>P</em> &lt; 0.05). Moreover, PFJ intervention had greater increases in attention than placebo intervention. There were no significant differences in attention between two interventions. The blood glucose levels were significantly lower in PFJ intervention than in placebo intervention both before the working ability test and after the attention test (<em>P</em> &lt; 0.05). A single consumption of PFJ improved working ability in healthy participants. This may be enhanced by improving attentional focus and maintaining postprandial blood glucose.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100120"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266594412400004X/pdfft?md5=30358a9032e8d7bf2bf7fc2735ccd4a7&pid=1-s2.0-S266594412400004X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139880547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the role of CFTR in human and mouse myometrium","authors":"Clodagh Prendergast,&nbsp;Susan Wray,&nbsp;Daniella Dungate,&nbsp;Christine Martin,&nbsp;Andra Vaida,&nbsp;Elizabeth Brook,&nbsp;Cecilia Ani Chioma,&nbsp;Helen Wallace","doi":"10.1016/j.crphys.2024.100122","DOIUrl":"10.1016/j.crphys.2024.100122","url":null,"abstract":"<div><h3>Background</h3><p>Abnormal cystic fibrosis transmembrane conductance regulator (CFTR) function in cystic fibrosis (CF) has been linked to airway smooth muscle abnormalities including bronchial hyperresponsiveness. However, a role for CFTR in other types of smooth muscle, including myometrium, remains largely unexplored. As CF life expectancy and the number of pregnancies increases, there is a need for an understanding of the potential role of CFTR in myometrial function.</p></div><div><h3>Methods</h3><p>We investigated the role of CFTR in human and mouse myometrium. We used immunofluorescence to identify CFTR expression, and carried out contractility studies on spontaneously contracting term pregnant and non-pregnant mouse myometrium and term pregnant human myometrial biopsies from caesarean sections.</p></div><div><h3>Results</h3><p>CFTR was found to be expressed in term pregnant mouse myometrium. Inhibition of CFTR, with the selective inhibitor CFTR_inh-172, significantly reduced contractility in pregnant mouse and human myometrium in a concentration-dependent manner (44.89 ± 11.02 term pregnant mouse, 9.23 ± 4.75 term-pregnant human; maximal effect at 60 μM expressed as a percentage of the pre-treatment control period). However, there was no effect of CFTR_inh-172 in non-pregnant myometrium.</p></div><div><h3>Conclusion</h3><p>These results demonstrate decreased myometrial function when CFTR is inhibited, which may have implications on pregnancy and labour outcome and therapeutic decisions for labour in CF patients.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000063/pdfft?md5=9762e8926cdf8ccf9e7df0f809caea53&pid=1-s2.0-S2665944124000063-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140085606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glycophagy is involved in cardiac glycogen regulation in response to exercise","authors":"Samuel L. James ,&nbsp;Parisa Koutsifeli ,&nbsp;Randall F. D'Souza ,&nbsp;Stewart WC. Masson ,&nbsp;Jonathan ST. Woodhead ,&nbsp;Troy L. Merry ,&nbsp;Lea MD. Delbridge ,&nbsp;Kimberley M. Mellor","doi":"10.1016/j.crphys.2024.100131","DOIUrl":"10.1016/j.crphys.2024.100131","url":null,"abstract":"<div><p>Cardiac glycogen-autophagy (‘glycophagy’) is disturbed in cardiometabolic pathologies. The physiological role of cardiac glycophagy is unclear. Exercise induces transient cardiac glycogen accumulation. Thus, this study experimentally examined glycophagy involvement during recovery from an exhaustive exercise protocol. Peak myocardial glycogen accumulation in mice was evident at 2 h post-exercise, preceded by transient activation of glycogen synthase. At 4 and 16 h post-exercise, glycogen degradation was associated with decreased STBD1 (glycophagy tagging protein) and increased GABARAPL1 (Atg8 protein), suggesting that glycophagy activity was increased. These findings provide the first evidence that glycophagy is involved in cardiac glycogen physiologic homeostasis post-exercise.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100131"},"PeriodicalIF":2.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000154/pdfft?md5=4344709af8fe86a0f582929f2bc55e3d&pid=1-s2.0-S2665944124000154-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of aerobic exercise during recovery from eccentric contraction on muscular performance, oxidative stress and inflammation","authors":"","doi":"10.1016/j.crphys.2024.100129","DOIUrl":"10.1016/j.crphys.2024.100129","url":null,"abstract":"<div><p>This study investigated the effects of aerobic exercise during recovery from eccentric contraction (EC) on muscular performance, oxidative stress, and inflammation. Nineteen male subjects between 18 and 29 years were divided into unexercised (control, <em>n</em> = 9) and exercised (<em>n</em> = 10) groups. Initially, the subjects performed EC as 3 sets until exhaustion with elbow flexion and extension on the Scott bench at 80% in 1RM, followed by four aerobic exercise sessions. The results obtained indicated (p &gt; 0.05) that aerobic physical exercise during the recovery period does not improve muscle performance (isometric strength and muscular fatigue), oxidative stress parameters (lipid peroxidation, protein oxidation and antioxidant enzyme activity), and inflammatory cytokines (IL-1β, TNF-α, IL-10). In conclusion, the aerobic exercise during the recovery period does not alter the parameters of performance, oxidative stress and inflammation induced by the EC.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100129"},"PeriodicalIF":2.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000130/pdfft?md5=3bc124a6bafe6d4560d79bcb01a5d439&pid=1-s2.0-S2665944124000130-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141394294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rib cage contributions to inspiratory capacity in patients with cervical spinal cord injury","authors":"Ryo Yoshida ,&nbsp;Kenta Kawamura ,&nbsp;Yukako Setaka ,&nbsp;Hyunjae Woo ,&nbsp;Nobuhisa Ishii ,&nbsp;Masafumi Mizukami ,&nbsp;Hirotaka Mutsuzaki ,&nbsp;Kazuhide Tomita","doi":"10.1016/j.crphys.2024.100127","DOIUrl":"10.1016/j.crphys.2024.100127","url":null,"abstract":"<div><h3>Background</h3><p>Cervical spinal cord injury (CSI) often leads to impaired respiratory function, affecting the overall well-being of patients. This study aimed to investigate the influence of rib cage motion on inspiratory capacity in CSI patients.</p></div><div><h3>Methods</h3><p>We conducted a study with 11 CSI patients, utilising respiratory inductance plethysmography (RIP). We measured ventilatory volume by spirometry concurrently with RIP. Participants were instructed to perform maximal inspiratory efforts. Inspiratory capacity (IC) was calculated from spirometry waveforms. We converted the respiratory waveforms of the chest and abdomen into inspiratory volume measured by a spirometer. The inspiratory volume measured by the chest sensor was defined as V_{RIP-rib cage} (V_RIP-rc), and the inspiratory volume measured by the abdominal sensor was defined as V_RIP-abdomen (V_RIP-ab). Subsequently, the relationships of IC with V_RIP-rc and V_RIPab were assessed.</p></div><div><h3>Results</h3><p>The mean IC was 1.828 ± 0.459 L, with the mean V_RIP-rc at 1.343 ± 0.568 L and the mean V_RIP-ab at 0.485 ± 0.427 L. A significant correlation was observed between IC and V_RIP-rc (r = 0.67, p = 0.02), indicating that rib cage motion significantly influences IC in CSI patients.</p></div><div><h3>Conclusion</h3><p>This study highlights the importance of rib cage motion in assessing inspiratory capacity in patients with CSI.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100127"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000117/pdfft?md5=eb6e464c840a001eb901e2fc142cd9f0&pid=1-s2.0-S2665944124000117-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141034773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new method for isolation and purification of fusion-competent inhibitory synaptic vesicles","authors":"Nisha Gopal ,&nbsp;Jeremy Leitz ,&nbsp;Chuchu Wang ,&nbsp;Luis Esquivies ,&nbsp;Richard A. Pfuetzner ,&nbsp;Axel T. Brunger","doi":"10.1016/j.crphys.2024.100121","DOIUrl":"10.1016/j.crphys.2024.100121","url":null,"abstract":"<div><p>Synaptic vesicles specific to inhibitory GABA-releasing neurons are critical for regulating neuronal excitability. To study the specific molecular composition, architecture, and function of inhibitory synaptic vesicles, we have developed a new method to isolate and purify GABA synaptic vesicles from mouse brains. GABA synaptic vesicles were immunoisolated from mouse brain tissue using an engineered fragment antigen-binding region (Fab) against the vesicular GABA transporter (vGAT) and purified. Western blot analysis confirmed that the GABA synaptic vesicles were specifically enriched for vGAT and largely depleted of contaminants from other synaptic vesicle types, such as vesicular glutamate transporter (vGLUT1), and other cellular organelles. This degree of purity was achieved despite the relatively low abundance of vGAT vesicles compared to the total synaptic vesicle pool in mammalian brains. Cryo-electron microscopy images of these isolated GABA synaptic vesicles revealed intact morphology with circular shape and protruding proteinaceous densities. The GABA synaptic vesicles are functional, as assessed by a hybrid (<em>ex vivo/in vitro</em>) vesicle fusion assay, and they undergo synchronized fusion with synthetic plasma membrane mimic vesicles in response to Ca²⁺-triggering, but, as a negative control, not to Mg²⁺-triggering. Our immunoisolation method could also be applied to other types of vesicles.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100121"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000051/pdfft?md5=6c8b058d157c2774cf47888a45844ca8&pid=1-s2.0-S2665944124000051-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139966618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the ethical void: Bias in reference citations and its academic ramifications","authors":"Alicia Mattiazzi,&nbsp;Martin Vila-Petroff","doi":"10.1016/j.crphys.2024.100130","DOIUrl":"10.1016/j.crphys.2024.100130","url":null,"abstract":"<div><p>Citation bias receives scant attention in discussions of ethics. However, inaccurate citation may lead to significant distortions in scientific understanding. Although ethnical and gender citation disparities have been proposed as critical aspects, there are other contributors to citation distortions, like region-based citation bias, that, although less recognized within the scientific community, are equally important. While the foundations of scientific citation include acknowledging pioneers, giving credit to related work, and providing background reading, other more subjective or even questionable criteria are often used when constructing a reference lists. Here, we discuss the potential causes and ethical concerns of citation bias, emphasizing the role of international- or region-based citation bias as one of the most harmful aspects of this ethical breach. We argue that the international scientific community should be aware of this problem and recognize its consequences, which include hindering the accurate dissemination of science, marginalizing underrepresented voices in academia, and impeding scientific progress. We advocate that scientists should compile their reference lists with the same seriousness and integrity they apply to all other aspects of their research.</p></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100130"},"PeriodicalIF":2.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2665944124000142/pdfft?md5=d5d24ddee544dbb017b1a99a31ffc726&pid=1-s2.0-S2665944124000142-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Yeast supplementation potentiates fluoxetine's anti-depressant effect in mice via modulation of oxido-inflammatory, CREB, and MAPK signaling pathways","authors":"Augustina Potokiri ,&nbsp;Noah A. Omeiza ,&nbsp;Abayomi M. Ajayi ,&nbsp;Paul A. Adeleke ,&nbsp;Abdullateef I. Alagbonsi ,&nbsp;Ezekiel O. Iwalewa","doi":"10.1016/j.crphys.2024.100132","DOIUrl":"10.1016/j.crphys.2024.100132","url":null,"abstract":"<div><h3>Introduction</h3><div>The therapeutic potential of yeast in the management of depression is unknown. Thus, we evaluated the modulatory effect of nutritional yeast supplementation on antidepressant activity of fluoxetine in mice models of depressive-like behaviors (DLB).</div></div><div><h3>Methods</h3><div>A total of 112 mice were divided into 16 groups (n = 7 each) for a 3-stage study. Stage I (non-DLB study) had groups Ia (10 mL/kg vehicle), Ib (20 mg/kg fluoxetine), Ic – If (2% yeast diet for all, but Id - If additionally received 5 mg/kg, 10 mg/kg, and 20 mg/kg fluoxetine respectively). Stage II (lipopolysaccharide [LPS] model of DLB) had groups IIa - IIb (10 mL/kg vehicle), IIc (20 mg/kg fluoxetine), IId (yeast) and IIe (yeast + 20 mg/kg fluoxetine). After these treatments for 24 days, animals in IIb - IIe received 0.83 mg/kg of LPS on the 25th day. Except for group IIIa (10 mL/kg vehicle), animals in other groups of stage III (unpredictable chronic mild stress [UCMS] model) were exposed to UCMS for 24 days along with 10 mL/kg vehicle (IIIb), 20 mg/kg fluoxetine (IIIc), yeast (IIId), or yeast + fluoxetine (IIIe).</div></div><div><h3>Results</h3><div>Yeast and fluoxetine attenuated LPS- and UCMS-induced immobility, derangement of oxido-inflammatory (TNF-α, IL-6, NO, MDA, SOD, GSH, CAT, and AChE) and CREB/MAPK pathways. While fluoxetine had more potent effect than yeast when used separately, pre-treatment of mice with their combination had more pronounced effect than either of them.</div></div><div><h3>Conclusion</h3><div>Yeast supplementation improves the antidepressant activity of fluoxetine in mice by modulating oxido-inflammatory, CREB, and MAPK pathways.</div></div>","PeriodicalId":72753,"journal":{"name":"Current research in physiology","volume":"7 ","pages":"Article 100132"},"PeriodicalIF":2.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}