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The Interaction of Stomach Acid, Blood pH, and Liver Metabolism with Acidic Cannabinoids: Partial Decarboxylation, Metabolic Transformation, and Physiological Implications
Keith Floyd
Posted: 16 December 2025
The Dysbiosis-Urolithin A-Melatonin Axis in Advanced Solid Tumors: A Pilot Observational Study and Proposal of a Composite Biomarker Triad
Alexandre Tavartkiladze
,Russel J. Reiter
,Ruite Lou
,Nana Okrostsvaridze
,Dinara Kasradze
,Pati Revazishvili
,Irine Andronikashvili
,Pirdara Nozadze
,Rusudan Khutsishvili
Urolithin A (UA) is a gut microbiota-derived metabolite of dietary ellagitannins with anti-inflammatory, mitochondrial, and neuroprotective properties. Because systemic UA availability depends on specific microbial consortia, dysbiosis may lead to functional loss of urolithin production. Melatonin, assessed via its major urinary metabolite 6-sulfatoxymelatonin (6-SMT), has been linked to cancer risk modulation in epidemiologic studies. In this three-year pilot observational study in Caucasian adults, we compared Group 1 (n = 231) with aggressive stage IV tumors (colorectal, hepatic, pancreatic, NSCLC, SCLC, TNBC, or glioblastoma), Group 2 (n = 118) with less aggressive advanced tumors (stage IV ER/PR+++ HER2-negative breast cancer, WHO grade 2 astrocytoma, or stage IV carcinoid tumors), and healthy controls (n = 117). UA was quantified by HPLC in plasma and stool; stool microbiota were cultured with attention to Streptococcus thermophilus, Enterococcus faecium, and Bacteroidetes; serum IL-6, TNF-α, IL-8, and IL-10 and 24 h urinary 6-SMT were measured. Group 1 exhibited severe selective dysbiosis with loss of S. thermophilus and E. faecium and critical reduction in Bacteroidetes, accompanied by undetectable UA in plasma and stool, marked elevation of pro-inflammatory cytokines (IL-6, TNF-α, IL-8) with normal IL-10, and profoundly reduced 6-SMT. Group 2 showed an attenuated pattern (reduced but detectable UA, moderate dysbiosis, moderately elevated cytokines, and moderate 6-SMT reduction). We identify a reproducible dysbiosis-UA-melatonin triad associated with tumor aggressiveness and propose it as a candidate composite biomarker framework for prospective validation and mechanistic studies.
Urolithin A (UA) is a gut microbiota-derived metabolite of dietary ellagitannins with anti-inflammatory, mitochondrial, and neuroprotective properties. Because systemic UA availability depends on specific microbial consortia, dysbiosis may lead to functional loss of urolithin production. Melatonin, assessed via its major urinary metabolite 6-sulfatoxymelatonin (6-SMT), has been linked to cancer risk modulation in epidemiologic studies. In this three-year pilot observational study in Caucasian adults, we compared Group 1 (n = 231) with aggressive stage IV tumors (colorectal, hepatic, pancreatic, NSCLC, SCLC, TNBC, or glioblastoma), Group 2 (n = 118) with less aggressive advanced tumors (stage IV ER/PR+++ HER2-negative breast cancer, WHO grade 2 astrocytoma, or stage IV carcinoid tumors), and healthy controls (n = 117). UA was quantified by HPLC in plasma and stool; stool microbiota were cultured with attention to Streptococcus thermophilus, Enterococcus faecium, and Bacteroidetes; serum IL-6, TNF-α, IL-8, and IL-10 and 24 h urinary 6-SMT were measured. Group 1 exhibited severe selective dysbiosis with loss of S. thermophilus and E. faecium and critical reduction in Bacteroidetes, accompanied by undetectable UA in plasma and stool, marked elevation of pro-inflammatory cytokines (IL-6, TNF-α, IL-8) with normal IL-10, and profoundly reduced 6-SMT. Group 2 showed an attenuated pattern (reduced but detectable UA, moderate dysbiosis, moderately elevated cytokines, and moderate 6-SMT reduction). We identify a reproducible dysbiosis-UA-melatonin triad associated with tumor aggressiveness and propose it as a candidate composite biomarker framework for prospective validation and mechanistic studies.
Posted: 16 December 2025
Towards a Cure: Emerging Therapeutic Advances for DMD, LGMD, and GNEM- Insights from Pre-Clinical and Clinical Research
Devinder Kaur
,Akash Ajay
Posted: 15 December 2025
Increased C-Reactive Protein Concentrations During Menstruation Are Important for the Pathophysiology of Endometriosis and Possibly Adhesion Formation. A Systematic Review
Maria Mercedes Binda
,Maya Sophie De Wilde
,Rudy Leon De Wilde
,Philippe R Koninckx
Posted: 15 December 2025
Coadministration of Melissa officinalis and Rosmarinus officinalis Alcoholic Extracts Exhibits Neuroprotective and Therapeutic Effects on Kidney Tissue and Apoptosis-Related Gene Expression in a Rat Model of Spinal Cord Injury
Coadministration of Melissa officinalis and Rosmarinus officinalis Alcoholic Extracts Exhibits Neuroprotective and Therapeutic Effects on Kidney Tissue and Apoptosis-Related Gene Expression in a Rat Model of Spinal Cord Injury
Ali Salehi
Spinal cord injury (SCI) is linked to a variety of negative outcomes and prognoses that can profoundly affect the lives of individuals, resulting in significant disruptions to multiple facets of their daily activities. A prominent secondary consequence of SCI is the onset of systemic infections, which may disseminate to other organs, including the kidneys, thereby impairing their functionality. Previous studies have demonstrated that the alcoholic extracts of Rosmarinus officinalis and Melissa officinalis possess antioxidant and neuroprotective properties, indicating their potential utility in the treatment and management of SCI and its associated secondary complications. Therefore, this study aimed to examine the combined effects of these extracts on sensory and motor functions, alterations in kidney tissue, and the expression of genes related to inflammation and apoptosis in a rat model of SCI. In this investigation, thirty-five adult male rats were divided into five experimental groups: a control group, a group subjected to spinal cord injury (SCI), a group treated with an alcoholic extract of Melissa officinalis, a group treated with an alcoholic extract of Rosmarinus officinalis, and a group receiving both extracts. The extracts were administered via intraperitoneal injection starting one-day post-SCI and continued for 28 days. Evaluations of sensory and motor functions were performed weekly, while changes in kidney tissue and the expression of genes associated with inflammation and apoptosis were assessed using histomorphometric techniques and quantitative real-time polymerase chain reaction (PCR). The results indicate that the alcoholic Melissa officinalis and Rosmarinus officinalis extracts significantly enhanced sensory and motor functions while reducing the expression levels of genes associated with inflammation (TNF-α) and apoptosis (caspase-3, Bax, and Bcl-2). These findings underscore the potential of these plant extracts in improving the management and treatment of spinal cord injury (SCI) and its secondary effects.
Spinal cord injury (SCI) is linked to a variety of negative outcomes and prognoses that can profoundly affect the lives of individuals, resulting in significant disruptions to multiple facets of their daily activities. A prominent secondary consequence of SCI is the onset of systemic infections, which may disseminate to other organs, including the kidneys, thereby impairing their functionality. Previous studies have demonstrated that the alcoholic extracts of Rosmarinus officinalis and Melissa officinalis possess antioxidant and neuroprotective properties, indicating their potential utility in the treatment and management of SCI and its associated secondary complications. Therefore, this study aimed to examine the combined effects of these extracts on sensory and motor functions, alterations in kidney tissue, and the expression of genes related to inflammation and apoptosis in a rat model of SCI. In this investigation, thirty-five adult male rats were divided into five experimental groups: a control group, a group subjected to spinal cord injury (SCI), a group treated with an alcoholic extract of Melissa officinalis, a group treated with an alcoholic extract of Rosmarinus officinalis, and a group receiving both extracts. The extracts were administered via intraperitoneal injection starting one-day post-SCI and continued for 28 days. Evaluations of sensory and motor functions were performed weekly, while changes in kidney tissue and the expression of genes associated with inflammation and apoptosis were assessed using histomorphometric techniques and quantitative real-time polymerase chain reaction (PCR). The results indicate that the alcoholic Melissa officinalis and Rosmarinus officinalis extracts significantly enhanced sensory and motor functions while reducing the expression levels of genes associated with inflammation (TNF-α) and apoptosis (caspase-3, Bax, and Bcl-2). These findings underscore the potential of these plant extracts in improving the management and treatment of spinal cord injury (SCI) and its secondary effects.
Posted: 12 December 2025
Hypoxia Inducible Factor-1a a Novel Molecular Target for 2-Aminopyrrole Derivative: Biological and Molecular Modeling Study
Svetlana S. Zykova
,Tatyana Gessel
,Aigul Galembikova
,Evgenii S. Mozhaitsev
,Sophia S. Borisevich
,Nazim Igidov
,Emiliya S. Egorova
,Ekaterina Mikheeva
,Natalia Khromova
,Pavel Kopnin
+4 authors
Posted: 12 December 2025
Treatment of Inflammatory Bowel Disease with Drugs Targeting PANoptosis
John Triantafillidis
,Stavros Karakatsanis
Posted: 12 December 2025
A Bird’s Eye View: A Close Look into Avian CAM Models for Translational Blood Cancer Research
Izabela Cymer
,Niamh McAuley
,Cathy E. Richards
,Hanne Jahns
,Siobhan V. Glavey
,Ann M. Hopkins
Posted: 11 December 2025
Oncofetal Reprogramming: A New Frontier in Cancer Therapy Resistance
Anh L. Nguyen
,Molly A. Lausten
,Bruce M. Boman
Posted: 11 December 2025
Genetic Analysis of Isolated Fetal Growth Restriction
Libing Luo
,Chunchun Chen
,Cindy Ka Yee Cheung
,Yanyan Li
,Xiaoying Dai
,Ting Zeng
,Ying Wang
Posted: 11 December 2025
MAL Unified General Dynamics Theory: The Median Principle for Algorithmic Digital R&D in Life Sciences and Cross-Disciplinary Informatics
Ting-Chao Chou
Posted: 10 December 2025
The Comparative Effect of Alendronate, Hop Extract and Their Combination on Bone Structural Properties in Rat Model of Osteoporosis
Edi Rođak
,Robert Grgac
,Rok Kostanjšek
,Milorad Zjalić
,Nada Oršolić
,Nikola Bijelić
Posted: 09 December 2025
Integrity of Data in Life Sciences: Essential for Sustaining Research Progress
Mahmoud K. Singer
Posted: 09 December 2025
Postbiotics Combination Synergises the Anti-Proliferative Effects of Doxorubicin in Gastric Cancer Cells: A Cellular and Molecular Deep Dive
Radwa A. Eladwy
,Mohamed Fares
,Muhammad A. Alsherbiny
,Dennis Chang
,Chun-Guang Li
,Deep Jyoti Bhuyan
Posted: 09 December 2025
Extracellular Vesicles and Lipid-Based Communications in Cancer Cells
Luis-Alfonso Adel-Alvarez
,Julio H. Rangel
,Brian I. Grajeda
,Breanna C. Pence
,Siddhartha Das
Posted: 09 December 2025
Comparative Study of Pesticide-Induced Liver Damage in Common Carp (Cyprinus carpio Linnaeus, 1758): An Integrated Biomarker Approach
Vesela Yancheva
,Stela Stoyanova
,Elenka Georgieva
,Eleonora Kovacheva
,Bartosz Bojarski
,Laszlo Antal
,Ifeanyi Emmanuel Uzochukwu
,Krisztian Nyeste
The intensive use of pesticides in agriculture poses serious risks to aquatic ecosystems and non-target organisms, yet toxicological data remain limited. This study evaluated the acute effects of three widely used pesticides—pirimiphos-methyl (10 and 60 μg/L), propamocarb hydrochloride (40 and 80 μg/L), and 2,4-D (50 and 100 μg/L)—on the liver of common carp (Cyprinus carpio Linnaeus, 1758), a sentinel species in aquaculture, but also a species equally important in risk assessment and environmental monitoring. Fish were exposed for 96 hours under controlled conditions, and histopathological, histochemical, and biochemical biomarkers were analyzed. All tested pesticides induced significant histopathological alterations, predominantly circulatory and degenerative changes, with severity increasing at higher concentrations. Propamocarb hydrochloride and 2,4-D caused more pronounced and partly irreversible hepatotoxicity compared to pirimiphos-methyl. Histochemical assessment revealed altered glycogen metabolism, while biochemical assays showed inhibition of key liver enzymes, such as ALAT and ASAT, but also ChE and LDH, indicating disrupted metabolic processes. These findings highlight the vulnerability of aquatic organisms to pesticide exposure and support the use of fish liver biomarkers as effective tools in ecotoxicology research. The study also emphasizes the need for stricter regulation and environmental monitoring of pesticide contamination in aquatic systems.
The intensive use of pesticides in agriculture poses serious risks to aquatic ecosystems and non-target organisms, yet toxicological data remain limited. This study evaluated the acute effects of three widely used pesticides—pirimiphos-methyl (10 and 60 μg/L), propamocarb hydrochloride (40 and 80 μg/L), and 2,4-D (50 and 100 μg/L)—on the liver of common carp (Cyprinus carpio Linnaeus, 1758), a sentinel species in aquaculture, but also a species equally important in risk assessment and environmental monitoring. Fish were exposed for 96 hours under controlled conditions, and histopathological, histochemical, and biochemical biomarkers were analyzed. All tested pesticides induced significant histopathological alterations, predominantly circulatory and degenerative changes, with severity increasing at higher concentrations. Propamocarb hydrochloride and 2,4-D caused more pronounced and partly irreversible hepatotoxicity compared to pirimiphos-methyl. Histochemical assessment revealed altered glycogen metabolism, while biochemical assays showed inhibition of key liver enzymes, such as ALAT and ASAT, but also ChE and LDH, indicating disrupted metabolic processes. These findings highlight the vulnerability of aquatic organisms to pesticide exposure and support the use of fish liver biomarkers as effective tools in ecotoxicology research. The study also emphasizes the need for stricter regulation and environmental monitoring of pesticide contamination in aquatic systems.
Posted: 04 December 2025
Melatonin Biosynthesis, Receptors, and the Microbiota–Tryptophan–Melatonin Axis: A Shared Dysbiosis Signature across Cardiac Arrhythmias, Epilepsy, Malignant Proliferation, and Cognitive Trajectories --- (Microbiota–Melatonin Axis in Disease and Cognition)
Alexandre Tavartkiladze
,Russel J. Reiter
,Ruite Lou
,Dinara Kasradze
,Nana Okrostsvaridze
,Pati Revazishvili
,Maia Maisuradze
,George Dundua
,Irine Andronikashvili
,Pirdara Nozadze
+4 authors
Background: Melatonin, an indolic neuromodulator with oncostatic and anti-inflammatory properties, is produced at extrapineal sites—most notably in the gut. Its canonical actions are mediated by high-affinity GPCRs (MT1/MT2) and by the melatonin-binding enzyme NQO2 (historically “MT3”). A growing body of work highlights a bidirectional interaction between the gut microbiota and host melatonin. Methods: We integrate two lines of work: (i) three clinical cohorts—cardiac arrhythmias (n = 111; 46–75 y), epilepsy (n = 77; 20–59 y), and stage III–IV solid cancers (25–79 y)—profiled with stool 16S rRNA sequencing, SCFA measurements, and circulating melatonin/urinary 6-sulfatoxymelatonin; and (ii) an age-spanning cognitive cohort with melatonin phenotyping, microbiome analyses, and exploratory immune/metabolite readouts, including a novel observation of melatonin binding on bacterial membranes. Results: Across all three disease cohorts we observed moderate-to-severe dysbiosis with reduced alpha-diversity and shifted beta-structure. The core dysbiosis implicated tryptophan-active taxa (Bacteroides/Clostridiales proteolysis and indolic conversions) and depletion of SCFA-forward commensals (e.g., Faecalibacterium, Blautia, Akkermansia, several Lactobacillus/Bifidobacterium spp.). Synthesized literature indicates that typical human gut commensals rarely secrete measurable melatonin in vitro; rather, their metabolites (SCFAs, lactate, tryptophan derivatives) regulate host enterochromaffin serotonin/melatonin production. In arrhythmia models, dysbiosis, bile-acid remodeling, and autonomic/inflammatory tone align with melatonin-sensitive antiarrhythmic effects. Epilepsy exhibits circadian seizure patterns and tryptophan-metabolite signatures, with modest and heterogeneous responses to add-on melatonin. Cancer cohorts show broader dysbiosis consistent with melatonin’s oncostatic actions. In the cognitive cohort, the absence of dysbiosis tracked with preserved learning across ages; exploratory immunohistochemistry suggested melatonin-binding sites on bacterial membranes in ~15–17% of samples. Conclusions: A unifying microbiota–tryptophan–melatonin axis plausibly integrates circadian, electrophysiologic, and immune–oncologic phenotypes. Practical levers include fiber-rich diets (to drive SCFAs), light hygiene, and time-aware therapy, with indication-specific use of melatonin.
Background: Melatonin, an indolic neuromodulator with oncostatic and anti-inflammatory properties, is produced at extrapineal sites—most notably in the gut. Its canonical actions are mediated by high-affinity GPCRs (MT1/MT2) and by the melatonin-binding enzyme NQO2 (historically “MT3”). A growing body of work highlights a bidirectional interaction between the gut microbiota and host melatonin. Methods: We integrate two lines of work: (i) three clinical cohorts—cardiac arrhythmias (n = 111; 46–75 y), epilepsy (n = 77; 20–59 y), and stage III–IV solid cancers (25–79 y)—profiled with stool 16S rRNA sequencing, SCFA measurements, and circulating melatonin/urinary 6-sulfatoxymelatonin; and (ii) an age-spanning cognitive cohort with melatonin phenotyping, microbiome analyses, and exploratory immune/metabolite readouts, including a novel observation of melatonin binding on bacterial membranes. Results: Across all three disease cohorts we observed moderate-to-severe dysbiosis with reduced alpha-diversity and shifted beta-structure. The core dysbiosis implicated tryptophan-active taxa (Bacteroides/Clostridiales proteolysis and indolic conversions) and depletion of SCFA-forward commensals (e.g., Faecalibacterium, Blautia, Akkermansia, several Lactobacillus/Bifidobacterium spp.). Synthesized literature indicates that typical human gut commensals rarely secrete measurable melatonin in vitro; rather, their metabolites (SCFAs, lactate, tryptophan derivatives) regulate host enterochromaffin serotonin/melatonin production. In arrhythmia models, dysbiosis, bile-acid remodeling, and autonomic/inflammatory tone align with melatonin-sensitive antiarrhythmic effects. Epilepsy exhibits circadian seizure patterns and tryptophan-metabolite signatures, with modest and heterogeneous responses to add-on melatonin. Cancer cohorts show broader dysbiosis consistent with melatonin’s oncostatic actions. In the cognitive cohort, the absence of dysbiosis tracked with preserved learning across ages; exploratory immunohistochemistry suggested melatonin-binding sites on bacterial membranes in ~15–17% of samples. Conclusions: A unifying microbiota–tryptophan–melatonin axis plausibly integrates circadian, electrophysiologic, and immune–oncologic phenotypes. Practical levers include fiber-rich diets (to drive SCFAs), light hygiene, and time-aware therapy, with indication-specific use of melatonin.
Posted: 04 December 2025
Ruptured Uterine Leiomyosarcoma with Heterologous Components, i.e. Osteosarcoma and Chondrosarcoma
Takuma Hayashi
,Yasuaki Amano
,Ikuo Konishi
Posted: 04 December 2025
GnRH Agonist Triptorelin Induces Hepatic Fibrosis via Sex-Specific Oxidative and Inflammatory Responses in Adolescent Rats
Kelsey J. Krutsinger
,Megan Ytzen
,Maya Pradhan
,Raznin Joly
,Patrick Wilson
,David Hydock
,Yuyan Han
Recently, GnRHa puberty blockers have been under scrutiny, with newly identified risks of heart and brain damage and recurrent concerns about fertility, cancer risk, and bone health. This study explores the effects of GnRHa on liver morphology, function, and injury response. Peripubertal male and female Sprague-Dawley rats received daily GnRHa triptorelin (100 μg) subcutaneously. Liver oxidative stress, inflammation, and fibrosis were evaluated via malondialdehyde and 8-OHdG (oxidative damage), immunohistochemistry for CK19 (cholangiocytes) and CD45 (leukocytes), and collagen staining as well as áSMA (liver fibrogenesis) and TIMP1 (extracellular matrix breakdown) expression, respectively. Following GnRHa treatment, only male rats exhibited increased ductular reaction and oxidative stress. In contrast, GnRHa-treated female rats showed increased leukocyte infiltration. In both sexes, GnRHa-treated rats showed increased fibrosis, with significantly increased collagen deposition and áSMA expression. Interestingly, GnRHa-treated female rats exhibited increased TIMP1 expression, whereas male rats showed decreased TIMP1 expression. Overall, GnRHa puberty blocking leads to significantly increased liver injury in both sexes. Specifically, biological females are at increased risk of hepatic inflammation, while biological males are at increased risk of oxidative stress. Human clinical trials are crucial for further exploring these findings.
Recently, GnRHa puberty blockers have been under scrutiny, with newly identified risks of heart and brain damage and recurrent concerns about fertility, cancer risk, and bone health. This study explores the effects of GnRHa on liver morphology, function, and injury response. Peripubertal male and female Sprague-Dawley rats received daily GnRHa triptorelin (100 μg) subcutaneously. Liver oxidative stress, inflammation, and fibrosis were evaluated via malondialdehyde and 8-OHdG (oxidative damage), immunohistochemistry for CK19 (cholangiocytes) and CD45 (leukocytes), and collagen staining as well as áSMA (liver fibrogenesis) and TIMP1 (extracellular matrix breakdown) expression, respectively. Following GnRHa treatment, only male rats exhibited increased ductular reaction and oxidative stress. In contrast, GnRHa-treated female rats showed increased leukocyte infiltration. In both sexes, GnRHa-treated rats showed increased fibrosis, with significantly increased collagen deposition and áSMA expression. Interestingly, GnRHa-treated female rats exhibited increased TIMP1 expression, whereas male rats showed decreased TIMP1 expression. Overall, GnRHa puberty blocking leads to significantly increased liver injury in both sexes. Specifically, biological females are at increased risk of hepatic inflammation, while biological males are at increased risk of oxidative stress. Human clinical trials are crucial for further exploring these findings.
Posted: 04 December 2025
A Hybrid Mesoscopic/Agent-Based Model for Crowd Dynamics with Emotional Contagion
Aissam Jebrane
,Abdelghani El Mousaoui
Posted: 04 December 2025
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