Oxidative stress: an essential factor in the pathogenesis of gastrointestinal mucosal diseases

Angelica sinensis polysaccharide could alleviate the gastrointestinal damage in alcoholic fatty liver disease mice: Regulation of alcohol metabolism and enhancement of short-chain fatty acids utilization

ETHNOPHARMACOLOGICAL RELEVANCE

Dysfunction of the intestinal barrier was an important trigger for alcoholic liver damage and alcohol had brought about intestinal damage before causing liver damage. The root of Angelica sinensis (Oliv.) Diels, crucial traditional medicinal material, was widely utilized for its blood-invigorating, intestinal-lubricating and gynecological benefits. Angelica sinensis polysaccharide (ASP) was an essential natural active ingredient of Angelica sinensis and exhibited considerable potential for gastrointestinal protection. Nevertheless, the systematic research of ASP on the gastrointestinal tract remained insufficient.

AIM OF THIS STUDY

To systematically explore the protective effect and underlying mechanisms of ASP against alcohol-induced gastrointestinal injury, including the stomach, ileum and colon.

MATERIALS AND METHODS

The AFLD mice model was established via the intragastric administration of alcohol twice a day for one week. The protective effect of ASP on the representative segments of the gastrointestinal tract (stomach, ileum and colon) was subsequently studied after confirming its hepatoprotective activity. The impact of ASP on gastrointestinal alcohol metabolism was examined to explain its antioxidant and antiapoptotic activities. Furthermore, the effect of ASP on short-chain fatty acids (SCFA) in the colon and colonic contents was investigated to further enhance the understanding of the underlying mechanisms.

RESULTS

ASP could reduce oxidative stress and apoptosis in the gastrointestinal tract via regulating CYP2E1-mediated alcohol metabolism. Additionally, ASP could significantly increase the levels of FFAR2, FFAR3 and HCAR2 in colon, thereby promoting the utilization of SCFA.

CONCLUSION

ASP was proven for the first time to improve gastrointestinal damage caused by alcohol, indicating its enormous potential as a candidate medicine for the treatment of alcohol related gastrointestinal injury.

Surgical Therapy of Gastric Ulcer Disease

Medical advancements, including Helicobacter pylori eradication and antisecretory agents, have reduced peptic ulcer disease (PUD)-associated hospital admissions, mortality, and surgical interventions over the past 30 years. Surgery plays an important role in the treatment of life-threatening complications of PUD, such as bleeding, perforation, and gastric outlet obstruction, as well as for disease that is refractory to medical management. The article highlights the critical role of surgery in cases where medical therapy is insufficient or in the event of emergency complications arising from PUD.

A machine vision tool for multi-color H2O2 sensing by MoOx nanoparticles with oxygen vacancies

Improving the ease of operation and portability of hydrogen peroxide (H2O2) detection in daily production and life holds significant application value. However, it remains a challenge to achieve rapid colorimetric detection of H2O2 and color change quantification. In this study, we achieved rapid and visual detection of H2O2 by MoOx (2 ≤ x ≤ 3) nanoparticles with rich oxygen vacancies using machine vision. As the concentration of H2O2 increases, the detection system exhibited a visible multi-color change from blue to green and then yellow and the absorption peak near 680 nm measured by the UV-visible spectrophotometer gradually decreased. With excellent sensitivity, a wide linear range of 0.1-600 μmol/L, concentrations as low as 0.1 μmol/L can be detected with good selectivity towards H2O2. The sensing mechanism of detecting H2O2 by the change of oxygen vacancies in MoOx was revealed through characterization methods such as XPS, EPR, and DFT. In addition, the Hue, Saturation, Value (HSV) visual analysis system based on MoOx was constructed to assist in the rapid, portable, and sensitive monitoring of H2O2 in practical application scenarios. This work offers an easy-to operate, low cost, and convenience for achieving rapid colorimetric determination of H2O2 and has broad application prospects in daily life and industrial production.

Nicotinamide adenine dinucleotide phosphate alleviates intestinal ischemia/reperfusion injury via Nrf2/HO-1 pathway

Intestinal ischemia-reperfusion (I/R) injury is a critical condition in the abdomen that has significant morbidity and fatality rates. Prior studies have noted the defensive role of the coenzymatic antioxidant reduced nicotinamide adenine dinucleotide phosphate (NADPH) in heart and brain I/R damage, yet its impact on intestinal I/R trauma required further exploration. Through the application of an in vitro oxygen-glucose deprivation-reoxygenation model and a mouse model of short-term intestinal I/R, this study clarified the defensive mechanisms of NADPH against intestinal I/R injury. We demonstrated that intraperitoneal NADPH administration markedly reduced interleukin-1β (IL-1β) levels and blocked NLRP3 inflammasome activation, hence reducing inflammation. The antioxidative properties of NADPH were established by the reduction of oxidative stress markers and enhancement of glutathione levels. Importantly, NADPH improved intestinal barrier integrity, indicated by an upregulation of zonula occludens-1 and the promotion of a balanced gut microbiome profile. Furthermore, we identified the nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase-1(HO-1) pathway as a crucial conduit for NADPH's beneficence. When this pathway was inhibited by ML385, the favorable outcomes conferred by NADPH were significantly abrogated. These results demonstrate that NADPH functions as an antioxidative, anti-inflammatory, microbiota-balancing, barrier-strengthening, and anti-inflammatory agent against intestinal I/R damage through activation of the Nrf2/HO-1 signaling pathway.

Gut microbiota perturbation and subsequent oxidative stress in gut and kidney tissues of zebrafish after individual and combined exposure to inorganic arsenic and fluoride

Chronic exposure to inorganic arsenic (iAs) and fluoride (F) affect gut health and potentially damage organs. The present study investigates the interplay between gut bacteria and oxidative stress (measured by MDA level, GSH level, catalase activity, Nrf2 translocation and expression) in zebrafish exposed to F (NaF 15 ppm) and As (As2O3 50 ppb) alone or in combination. Combined exposure to As and F reduced gut bacterial alteration and imposed less oxidative stress compared to F- exposure alone. V3-V4 metagenomic sequencing revealed Pseudomonas, Aeromonas and Plesiomonas genera dominated in As or F treated groups while As+F treated group was enriched in beneficial Lactococcus and Streptococcus genera. Functional KEGG analysis demonstrated treatment-specific changes in bacterial metabolism, host organismal systems, human diseases, as well as cellular processes of microbial community were significantly affected. When Aeromonas sp. isolated from F-treated fish gut, tagged with GFP-vector and fed (~3.2 × 106 CFU/mL) to untreated fish, induced oxidative stress in gut and kidney. Gut bacteria were found to both increase and mitigate iAs or F-toxicity, whereas As+F treatment promoted a protective response. Correlation analysis between gut microbial community at genus level and oxidative stress parameters of gut and kidney, showed Aeromonas and Plesiomonas genera are strongly correlated with oxidative stress (r = 0.5-0.9, p˂0.05). This study identifies microbiome biomarkers of iAs and F toxicity on gut-kidney axis.

Exploring the antidiabetic activity of potential probiotic bacteria isolated from traditional fermented beverage

Type 2 Diabetes continues to be one of the major public health issues worldwide without any sustainable cure. The modulation of gut microbiota is believed to be caused by probiotic bacteria and several probiotic strains have previously shown antidiabetic activity. The present study aims to isolate potential probiotic bacteria from traditionally used fermented rice beer of Assam, India and to investigate its anti-hyperglycemic effect. Of the 20 isolated bacterial isolates, 5 isolates showed potential probiotic activities, of which, 2 isolates viz. Bacillus sp. FRB_A(A) and Acetobacter sp. FRB_B(S) showed good in vitro anti-oxidant and anti α-glucosidase activities. Based on the in vitro results, isolate Bacillus sp. FRB_A(A) was further used to evaluate the antidiabetic activity in streptozotocin induced diabetic rat model. After 21 days, the blood glucose level in diabetic rats with probiotic administration significantly lowered from 458.00 ± 46.62 mg/dl to 108.20 ± 6.76 mg/dl (p < 0.001), whereas, in diabetic rats without probiotic remained high (576.20 ± 29.48 mg/dl). On analyzing the endogenous antioxidant profile in various tissues of the experimental rats, reduced lipid peroxidation, glutathione level and superoxide dismutase and glutathione peroxidase activity were observed in probiotic administered rats in comparison to the streptozotocin treated diabetic controls. In conclusion, the bacteria Bacillus sp. FRB_A(A) isolated from fermented rice beer possesses probiotic attributes and exhibits significant anti-hyperglycemic activities.

Bacterial exopolysaccharides: Characteristics and antioxidant mechanism

Bacterial exopolysaccharides (EPS) are secondary metabolites of microorganisms which play important roles in adhesion, protection, biofilm formation, and as a source of nutrition. Compared with polysaccharides obtained from animal and plant species, bacterial polysaccharides have significant advantages in terms of production cost and large-scale production due to their abundant metabolic pathways and efficient polysaccharide production capacity. Most extracellular polysaccharides are water-soluble, and some are insoluble, such as bacterial cellulose. Some soluble bacterial EPS also have biological activities such as anticancer, antioxidant, antibacterial and immunomodulatory activities. These biological activities are mainly affected by the molecular weight, monosaccharide type, composition and structure of EPS. In recent years, bacterial EPS are considered as novel functional polysaccharides with important application prospects, especially in free radical scavenging and antioxidation. This review focuses on the characteristics of bacterial EPS, their ability to scavenge free radicals and their corresponding antioxidant mechanisms, and summarizes the relationship between different structures (such as monosaccharide composition, functional groups, molecular weight, etc.) and antioxidant activities. It provides a new idea for the development of more bioactive bacterial EPS antioxidants, points out a new direction for the commercial production of natural, safe and economical polysaccharide drugs and health products.

Sniffer restricts arboviral brain infections by regulating ROS levels and protecting blood-brain barrier integrity in Drosophila and mosquitoes

Arthropod-borne viruses (arboviruses) are transmitted to humans by arthropod vectors and pose a serious threat to global public health. Neurotropic arboviruses including Sindbis virus (SINV) persistently infect the central nervous system (CNS) of vector insects without causing notable pathological changes or affecting their behavior or lifespan. However, the mechanisms by which vector insects evade these viral infections in the brains are poorly understood. In this study, we found that loss of the carbonyl reductase Sniffer (Sni) led to a significant increase in SINV infection in the Drosophila brain. Sni regulates reactive oxygen species (ROS) levels, and its depletion leads to elevated ROS, which in turn disrupts the septate junctions (SJs) between subperineurial glia (SPG) cells, compromising the integrity and barrier function of the blood-brain barrier (BBB). Genetic and pharmacological reduction of ROS restored BBB integrity and reduced viral load in the brains of Sni-depleted flies. Additionally, we identified Sni homologs and revealed that the antiviral function of Sni is highly conserved in mosquitoes, where it regulates ROS and protects BBB integrity. Our results revealed an evolutionarily conserved antiviral mechanism in which Sni acts as an antioxidant that protects BBB integrity and restricts viral infection in the vector insect brain.

A multifunctional bacterial cellulose-based dressing modified by quaternized chitosan and grafted protocatechuic acid for diabetic ulcer

Herein, we developed a multifunctional bacterial cellulose-based dressing (PHBC) modified by quaternized chitosan (HACC) along with protocatechuic acid (PA), through in situ biosynthesis combined with covalent immobilization. The obtained PHBC dressing maintained the excellent physicochemical characteristics of BC, such as high porosity (above 76 %); high water absorption ratio, >80 % of water absorption rate (approximately 30 g/g) has completed in half an hour; favorable hydrophilicity with contact angle of about 50° and excellent flexibility. The introduction of PA-grafted HACC endows exhibited outstanding antibacterial properties against, anti-inflammatory performance and antioxidant capacity. Furthermore, PHBC II, with the reaction solubility of PA was 3 mg/mL, could promote NIH3T3 and HUVECs proliferation and spread. In vivo experiments further verified that PHBC II can effectively promote new granulation tissue hyperplasia and collagen deposition and expression around diabetic ulcers, reduce the inflammatory phenomenon around the wound, and promote the internal capillaries of the wound. The repair and regeneration of the network can promote better and faster wound healing. These results illustrate that the PHBC functional dressing has an important reference value for the clinical treatment of diabetic ulcers.

Oral chitosan-cyclodextrin "shell-core" nanoparticles co-loaded Rhein and chlorogenic acid for ulcerative colitis treatment

The food-derived ingredients Rhein (RH) and chlorogenic acid (CGA) have DEMONSTRATED a potential synergistic effect in the treatment of ulcerative colitis (UC) through their anti-inflammatory and antioxidant properties. However, the oral co-delivery of RH and CGA faces challenges such as differences in hydrophilicity and hydrophobicity, gastrointestinal instability, and inadequate colonic targeting. To address these issues, shell-core nanoparticles were developed for the co-encapsulation of RH and CGA (CP@CGA-FA/TA@RH NPs). These nanoparticles utilize cyclodextrin-based polymers and folate-amantadine polymers to form a supramolecular core that targets macrophages for anti-inflammatory action with RH, while chitosan cross-link to CGA in the outer shell provides microenvironment-sensitive antioxidant release. The results indicate that CP@CGA-FA/TA@RH NPs could effectively inhibit the classical TLR4/MyD88/NF-κB-mediated anti-inflammatory pathway and activate the Nrf2/HO-1-mediated antioxidant pathway, offering a novel approach to UC treatment. Q-value analysis confirms the substantial co-medication effect between RH and CGA. This study is the first to develop a nano-system combining two food-derived ingredients for the integrated treatment of UC.

In vivo anti-gastric ulcer activity of 7-O-methyl aromadendrin and sakuranetin via mitigating inflammatory and oxidative stress trails

ETHNOPHARMACOLOGICAL RELEVANCE

Eucalyptus genus has been used for a very long time in conventional treatment as an anti-ulcer remedy.

AIM OF THE STUDY

The study aimed to explore the gastroprotective potential of 7-O-methyl aromadendrin (7-OMA), and sakuranetin (SKN) in comparison with omeprazole. The study tackled the contribution of their anti-inflammatory, antioxidant, and antiapoptotic capabilities to their anti-gastric ulcer effects.

MATERIALS AND METHODS

An ethanol-induced gastric ulcer model in rats was adopted and the consequences were confirmed by a molecular docking study.

RESULTS

The oral pretreatment of rats 1 h before ethanol using omeprazole (20 mg/kg) or 7-OMA (20 or 40 mg/kg) or SKN (20 or 40 mg/kg) exhibited gastroprotective and anti-inflammatory properties to different extents. These amendments witnessed as restorations in the stomach histological architecture in H and E-stained sections, mucus content in periodic acid-Schiff (PAS) stained sections with increased cellular proliferation, as demonstrated by increased immunohistochemical staining of PCNA, and increments in stomach COX-1 activity and eNOS. The highest dose of SKN showed the best corrections to reach 4.8, 1.8, and 2.1 folds increase in PAS, COX-1 and eNOS, respectively as compared to the untreated ethanol-induced gastric ulcer group; effects that were comparable to that of omeprazole. Moreover, reductions in COX-2 activity, and the protein expression of NF-κB, IL-6, TNF-α and NOx, in addition to the gene expression of inducible iNOS were also noted. Moreover, the antioxidant and antiapoptotic capabilities of omeprazole, 7-OMA, and SKN were perceived. SKN (40 mg/kg) succeeded to show the unsurpassed results to reach 293.6%, 237.1%, 274.7%, 248.2%, and 175.4% in total and reduced GSH, catalase, SOD, and Bcl2, respectively, as well as 50.0%, 46.8%, and 52.1 % in oxidized GSSG, TBARS and caspase-3, respectively. The gastroprotective potential of the tested compounds can be assigned to their anti-inflammatory, antioxidant and antiapoptotic properties.7-OMA and SKN were studied using molecular docking into the binding sites of the most significant inflammatory targets, including COX-2, TNF-α, iNOS, and NF-κB. Pharmacokinetic and physicochemical parameters in silico were appropriate.

CONCLUSION

The prophylactic use of 7-OMA and SKN could be considered as an add-on to recurrent gastric ulcers and might influence its therapeutic approaches.

Advances in understanding cisplatin-induced toxicity: Molecular mechanisms and protective strategies

Cisplatin, a widely used chemotherapeutic agent, has proven efficacy against various malignancies. However, its clinical utility is hampered by its dose-limiting toxicities, including nephrotoxicity, ototoxicity, neurotoxicity, and myelosuppression. This review aims to provide a comprehensive overview of cisplatin toxicity, encompassing its underlying mechanisms, risk factors, and emerging therapeutic strategies. The mechanisms of cisplatin toxicity are multifactorial and involve oxidative stress, inflammation, DNA damage, and cellular apoptosis. Various risk factors contribute to the interindividual variability in susceptibility to cisplatin toxicity. The risk of developing cisplatin-induced toxicity could be related to pre-existing conditions, including kidney disease, hearing impairment, neuropathy, impaired liver function, and other comorbidities. Additionally, this review highlights the emerging therapeutic strategies that could be applied to minimize cisplatin-induced toxicities and aid in optimizing cisplatin treatment regimens, improving patient outcomes, and enhancing the overall quality of cancer care.

Panduratin A mitigates inflammation and oxidative stress in DSS-induced colitis mice model

AIM

This study explored Panduratin A's protective effects against DSS-induced colitis in mice, focusing on reducing inflammation and oxidative stress in the colon.

METHODS

Mice were treated with dextran sodium sulfate (DSS) and Panduratin A (3, 6, 18 mg/kg), and changes in body weight, colon length, Disease Activity Index (DAI), histopathology, inflammation markers including tumor necrosis factor- α (TNF-α), Interleukin-1 β (IL-1β), Myeloperoxidase (MPO), and oxidative stress, Malondialdehyde (MDA) were evaluated.

RESULTS

Panduratin A significantly reversed DSS-induced symptoms, including body weight loss, colonic length shortening, and DAI increase, while reducing histopathological damage. It lowered inflammatory markers and oxidative stress, suppressed NF-κB activation, and enhanced Nrf2 and HO-1 expression.

CONCLUSION

Panduratin A shows promise as a colitis treatment, warranting further research for broader clinical application.

Structural characterization of the polysaccharides from Atractylodes chinensis (DC.) Koidz. and the protective effection against alcohol-induced intestinal injury in rats

A neutral polysaccharide, AP, with a weight-average molecular weight of 60.61 kDa, consisting mainly of arabinose and galactose, was isolated from the rhizomes of Atractylodes chinensis (DC.) Koidz. Methylation analyses and nuclear magnetic resonance spectroscopy indicated that the probable repeat unit of AP was →3,6)-α-D-Galp-(1→ residues and constituted the main chain, with a side chain of →5)-α-L-Araf-(1→ and terminal α-L-Araf attached to C-6 of the main chain. The protective activity and potential mechanisms of action of AP on the intestinal tract were investigated. AP improved intestinal oxidative stress injury and inflammatory responses by promoting the nuclear factor erythroid 2-related factor 2/heme oxygenase-1 signaling pathway and inhibiting the toll-like receptor 4/myeloid differentiation primary response protein 88/nuclear factor-kappa B signaling pathway, but also repaired colonic mucosal injury and reduced intestinal leakage of endotoxins by promoting expression of the tight-junction proteins zonula occludens-1 and occludin. AP improved ecological dysregulation of the intestinal microbiota and promoted the growth of the potentially beneficial bacteria Lactobacillus_taiwanensis, Limosilactobacillus_reuteri and Akkermansia_muciniphila. AP promoted intestinal health by increasing the production of potentially beneficial metabolites such as short-chain fatty acids, Indole-3-propionic acid, and N-Eicosapentaenoyl tryptophan through metabolism (amino acids, lipids, carbohydrates). These results suggest that AP is a promising prebiotic in attenuating alcohol-induced intestinal damage.

Interplay between epigenetics, senescence and cellular redox metabolism in cancer and its therapeutic implications

There is accumulating evidence indicating a close crosstalk between key molecular events regulating cell growth and proliferation, which could profoundly impact carcinogenesis and its progression. Here we focus on reviewing observations highlighting the interplay between epigenetic modifications, irreversible cell cycle arrest or senescence, and cellular redox metabolism. Epigenetic alterations, such as DNA methylation and histone modifications, dynamically influence tumour transcriptome, thereby impacting tumour phenotype, survival, growth and spread. Interestingly, the acquisition of senescent phenotype can be triggered by epigenetic changes, acting as a double-edged sword via its ability to suppress tumorigenesis or by facilitating an inflammatory milieu conducive for cancer progression. Concurrently, an aberrant redox metabolism, which is a function of the balance between reactive oxygen species (ROS) generation and intracellular anti-oxidant defences, influences signalling cascades and genomic stability in cancer cells by serving as a critical link between epigenetics and senescence. Recognizing this intricate interconnection offers a nuanced perspective for therapeutic intervention by simultaneously targeting specific epigenetic modifications, modulating senescence dynamics, and restoring redox homeostasis.

Alleviative effects of green-fabricated zinc oxide nanoparticles on acrylamide-induced oxidative and inflammatory reactions in the rat stomach via modulating gastric neuroactive substances and the MiR-27a-5p/ROS/NF-κB axis

Little is known about the effects of acrylamide (AMD) on the stomach. So, this study evaluated the effect of oral AMD exposure (20 mg/kg b.wt) on oxidative status, apoptotic, and inflammatory reactions in rat's stomach for 60 days. To explore novel targets of AMD toxicity, a more detailed molecular and immune-expression study was performed. Besides, the possible protective effect of green synthesized zinc oxide nanoparticles (G-ZNP) (10 mg/kg b.wt) was explored. The results revealed that AMD significantly provoked oxidative and lipid peroxidative damage of the stomach in terms of increased ROS and MDA but reduced SOD, CAT, GSH, and GSH/GSSG. Additionally, the stomachs of AMD-exposed rats showed a significant increment of PGE2 but reduced NO. Histopathologically, AMD induced a significant increase in PAS stain and the immunoexpression of iNOS and NF-κB in the glandular stomach. A significant upregulation of CART, VACHT, EGFR, caspase-3, NOS-1, and miR-27a-5p was evident in the stomach of the AMD group. Yet, G-ZNP oral dosing significantly rescued the AMD-induced oxidative damage, apoptotic reaction, inflammatory effect, and altered miR-27a-5p and gene expressions in the stomach. Conclusively, these findings demonstrated the efficacy of G-ZNP in protecting against the harmful impacts of acrylamide on stomach tissues.

The relationship between serum uric acid and gastrointestinal bleeding in peritoneal dialysis patients: a propensity score analysis

PURPOSE

Gastrointestinal bleeding is an important gastrointestinal complication among peritoneal dialysis patients and correlated with a higher risk of mortality. Increased uric acid levels are a significant complication for peritoneal dialysis patients and have been associated with an increased risk of hemorrhagic stroke. The objective of the present study was to investigate the relationship between serum uric acid levels and gastrointestinal bleeding in peritoneal dialysis patients.

METHODS

A total of 2498 peritoneal dialysis patients were recruited. Based on the optimal uric acid cutoff value, two groups of patients were divided. We constructed a propensity-score-matched population of 1762 patients by matching sex, age, and body mass index. Survival outcomes between the two groups were compared using adjusted Kaplan-Meier curves. We constructed the restricted cubic splines regression to assess the correlation between levels of uric acid and gastrointestinal bleeding. A multivariate Cox proportional hazards regression was performed to test whether higher levels of uric acid are an independent risk factor for gastrointestinal bleeding. We performed a forest plot to show interaction effects in different subgroups.

RESULTS

According to restricted cubic splines regression, uric acid levels were positively correlated with the risk of gastrointestinal bleeding events. After adjusted different confounding factors, patients with high levels of uric acid were prone to experience gastrointestinal bleeding (HR 1.868, 95%CI 1.001-3.486). In subgroups, the interaction between higher levels of uric acid and utilizing proton pump inhibitors was significant (P for interaction = 0.034). Further research found that taking proton pump inhibitors could decrease the risk of gastrointestinal bleeding in peritoneal dialysis patients accompanied high levels of uric acid.

CONCLUSION

The baseline high levels of uric acid are an independent risk factor for gastrointestinal bleeding in patients undergoing peritoneal dialysis.

Recognizing the biological barriers and pathophysiological characteristics of the gastrointestinal tract for the design and application of nanotherapeutics

The gastrointestinal tract (GIT) is an important and complex system by which humans to digest food and absorb nutrients. The GIT is vulnerable to diseases, which may led to discomfort or even death in humans. Therapeutics for GIT disease treatment face multiple biological barriers, which significantly decrease the efficacy of therapeutics. Recognizing the biological barriers and pathophysiological characteristics of GIT may be helpful to design innovative therapeutics. Nanotherapeutics, which have special targeting and controlled therapeutic release profiles, have been widely used for the treatment of GIT diseases. Herein, we provide a comprehensive review of the biological barrier and pathophysiological characteristics of GIT, which may aid in the design of promising nanotherapeutics for GIT disease treatment. Furthermore, several typical diseases of the upper and lower digestive tracts, such as Helicobacter pylori infection and inflammatory bowel disease, were selected to investigate the application of nanotherapeutics for GIT disease treatment.

CPT1A mediates radiation sensitivity in colorectal cancer

The prevalence and mortality rates of colorectal cancer (CRC) are increasing worldwide. Radiation resistance hinders radiotherapy, a standard treatment for advanced CRC, leading to local recurrence and metastasis. Elucidating the molecular mechanisms underlying radioresistance in CRC is critical to enhance therapeutic efficacy and patient outcomes. Bioinformatic analysis and tumour tissue examination were conducted to investigate the CPT1A mRNA and protein levels in CRC and their correlation with radiotherapy efficacy. Furthermore, lentiviral overexpression and CRISPR/Cas9 lentiviral vectors, along with in vitro and in vivo radiation experiments, were used to explore the effect of CPT1A on radiosensitivity. Additionally, transcriptomic sequencing, molecular biology experiments, and bioinformatic analyses were employed to elucidate the molecular mechanisms by which CPT1A regulates radiosensitivity. CPT1A was significantly downregulated in CRC and negatively correlated with responsiveness to neoadjuvant radiotherapy. Functional studies suggested that CPT1A mediates radiosensitivity, influencing reactive oxygen species (ROS) scavenging and DNA damage response. Transcriptomic and molecular analyses highlighted the involvement of the peroxisomal pathway. Mechanistic exploration revealed that CPT1A downregulates the FOXM1-SOD1/SOD2/CAT axis, moderating cellular ROS levels after irradiation and enhancing radiosensitivity. CPT1A downregulation contributes to radioresistance in CRC by augmenting the FOXM1-mediated antioxidant response. Thus, CPT1A is a potential biomarker of radiosensitivity and a novel target for overcoming radioresistance, offering a future direction to enhance CRC radiotherapy.

Discovery of Thiazole Carboxamides as Novel Vanin-1 Inhibitors for Inflammatory Bowel Disease Treatment

Inflammatory bowel disease (IBD) is a clinically heterogeneous disease demanding more therapeutic targets and intervention strategies. Vanin-1, an oxidative stress-regulating protein, has emerged as a promising target for alleviating inflammation and oxidative stress. In this study, a series of thiazole carboxamide derivatives as vanin-1 inhibitors were designed and synthesized. The preferred compound, X17, demonstrated potent inhibition against vanin-1 at the protein, HT-29 cell, and tissue levels, whose binding mode with the target was confirmed via the cocrystal structure. X17 achieved a high bioavailability of 81% in rats, accompanied by concentration-dependent inhibition of serum vanin-1. In a DSS-induced mouse colitis model, X17 exhibited potent anti-inflammatory and antioxidant activities, repressing the inflammatory factor expressions and myeloperoxidase activity, elevating the colonic glutathione reserve, and restoring the intestinal barrier. Collectively, these findings depict the discovery of a potent vanin-1 inhibitor, providing an opportunity for further drug candidate development for treating IBD.

Gastroprotective effects of Pediococcus acidilactici GKA4 and Lactobacillus brevis GKL93 against ethanol-induced gastric ulcers via regulation of the immune response and gut microbiota in mice

Excessive alcohol consumption is a significant pathogenic factor involved in the initiation of noninfectious gastric ulcers. Probiotics based on a specific strain can mitigate gastric damage. However, the protective effects of Pediococcus acidilactici (GKA4) and Lactobacillus brevis (GKL93) against alcohol-induced gastric mucosal damage remain unclear. Hence, the gastroprotective effects of these probiotic strains were investigated in BALB/c mice with gastric mucosa damage induced by absolute alcohol. The results revealed that preadministration of GKA4 and GKL93 increased the expression of antioxidative enzymes (SOD, catalase, GPx), anti-inflammatory cytokines (IL-4 and IL-10), and heat shock protein genes (HSP70 and HSP90) and decreased the expression of apoptosis-related genes (Bax, cytochrome c, and caspase-3), MDA, and pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α). Mechanistically, GKA4 and GKL93 increased the relative abundance of beneficial flora (Coriobacteriia, Lachnospiraceae_NK4A136_group, Roseburia, f__Oscillospiraceae unclassified, Ruminococcus, Adlercreutzia, and [Eubacterium]_xylanophilum_group) that may promote antioxidant and anti-inflammatory effects via upregulation of the expression of proteins in the Nrf2/HO-1 pathway and downregulation of the expression of proteins in the NF-κB/iNOS/COX-2 signaling pathway, subsequently attenuating gastrointestinal permeability and ulcer symptoms. Furthermore, correlation analysis revealed that [Eubacterium]_xylanophilum_group and f_Oscillospiraceae_unclassified were two significant beneficial flora associated with ethanol-induced gastric ulcers after preadministration of GKA4 and GKL93. In summary, the gastroprotective effects of P. acidilactici GKA4 and L. brevis GKL93 against ethanol-induced gastric ulcers in mice include suppressing oxidative- and inflammatory-related pathways and modulation of the gut microbiota. This novel finding highlights the potential of these probiotics as functional materials in preventing alcohol-induced gastric mucosal damage.

Goat milk derived small extracellular vesicles ameliorate LPS-induced intestinal epithelial barrier dysfunction, oxidative stress, and apoptosis by inhibiting the MAPK signaling pathway

Intestinal injury is often accompanied by epithelial barrier dysfunction, oxidative stress, and apoptosis. Previous research studies have demonstrated that small extracellular vesicles (sEVs) from animal milk play a crucial role in regulating intestinal injury. Nonetheless, there has been limited research on the impact of goat milk sEVs on intestinal damage. This study aims to explore the functional differences between proteins in colostrum-derived sEVs (CME) and mature milk-derived sEVs (MME) from goat and elucidate their effects and mechanisms on lipopolysaccharide (LPS)-induced injury in IEC-6. Proteomic analysis revealed that both CME and MME are rich in various bioactive proteins that have regulatory effects on cell damage. CME and MME significantly improved LPS-induced IEC-6 barrier dysfunction and oxidative stress. Additionally, CME and MME alleviated LPS-induced IEC-6 proliferation inhibition and apoptosis. Notably, CME exhibited a more significant improvement effect. RNA-Seq analysis indicated that CME ameliorates IEC-6 injury by inhibiting multiple genes and signaling pathways associated with cell damage, particularly the MAPK signaling pathway. In summary, goat milk-derived sEVs improve LPS-induced IEC-6 injury by targeting the MAPK signaling pathway, significantly restoring the intestinal epithelial barrier function, reducing oxidative stress, and alleviating apoptosis. These findings offer scientific evidence supporting the potential application of goat milk-derived sEVs as protective agents against intestinal injury.

Therapeutic potential of Lacticaseibacillus rhamnosus grx10 and its derived postbiotic through gut microbiota and MAPK/MLCK/MLC pathway-mediated intestinal barrier repairment in ulcerative colitis

Lacticaseibacillus rhamnosus grx10 (grx10) has shown promising potential in promoting intestinal health as predicted by genomic and metabolomic analyses. Given the increasing prevalence of ulcerative colitis (UC) and the limitations of existing treatments, exploring alternative therapeutic strategies is essential. This study explored the therapeutic effects and underlying mechanisms of grx10 and its derived postbiotic (P-grx10) in a mouse model of dextran sulfate sodium (DSS)-induced chronic UC. The intervention with grx10 and P-grx10 significantly alleviated clinical symptoms and improved biochemical markers in UC mice. These effects included reducing the disease activity index (DAI), improving colon length and histopathological damage, decreasing the secretion of inflammatory cytokines, and preventing the reduction of antioxidant enzymes. Additionally, grx10 and P-grx10 downregulated key proteins in the Mitogen-Activated Protein Kinase (MAPK)/myosin light chain kinase (MLCK)/myosin light chain (MLC) pathway, prevented the dissociation of tight junction (TJ) proteins and E-cadherin, reduced intestinal permeability, and restored the integrity of the intestinal barrier. Furthermore, both grx10 and P-grx10 modulated the composition and abundance of gut microbiota, helping to maintain intestinal microbiome homeostasis. In conclusion, this study provided evidence regarding the role of grx10 and P-grx10 in alleviating intestinal barrier dysfunction associated with UC and restoring gut microbiota balance. Notably, P-grx10 exhibited higher anti-inflammatory activity and better restoration of intestinal barrier function, whereas the live probiotic grx10 showed a stronger regulatory effect on the gut microbiota. These findings suggest that grx10 and P-grx10 could serve as promising nutritional adjunct therapies for UC, providing novel insights into the distinct roles of probiotic and its derived postbiotic in UC treatment.

Pharmacodynamics and safety in relation to dose and response of plant flavonoids in treatment of cancers

Despite the recent advancements in developing bioactive nutraceuticals as anticancer modalities, their pharmacodynamics, safety profiles, and tolerability remain elusive, limiting their success in clinical trials. The failure of anticancer drugs in clinical trials can be attributed to the changes in drug clearance, absorption, and cellular responses, which alter the dose-response efficacy, causing adverse health effects. Flavonoids demonstrate a biphasic dose-response phenomenon exerting a stimulatory or inhibitory effect and often follow a U-shaped curve in different preclinical cancer models. A double-edged sword, bioflavonoids' antioxidant or prooxidant properties contribute to their hormetic behavior and facilitate redox homeostasis by regulating the levels of reactive oxygen species (ROS) in cells. Emerging reports suggest a need to discuss the pharmacodynamic broad-spectrum of plant flavonoids to improve their therapeutic efficacy, primarily to determine the ideal dose for treating cancer. This review discusses the dose-response effects of a few common plant flavonoids against some types of cancers and assesses their safety and tolerability when administered to patients. Moreover, we have emphasized the role of dietary-rich plant flavonoids as nutraceuticals in cancer treatment and prevention.

MT1G promotes iron autophagy and inhibits the function of gastric cancer cell lines by intervening in GPX4/SQSTM1

Gastric cancer (GC) is the fifth most common cancer and the third most common cause of cancer death globally, with high invasiveness, high recurrence rate, and poor prognosis. Multiple studies have shown that Metallothionein-1G (MT1G) is closely associated with oxidative stress, ferroptosis, and autophagy. However, the role and potential mechanisms of MT1G in GC have not been fully elucidated. This study aims to explore the biological functions and regulatory mechanisms of MT1G in GC. Perform bioinformatics analysis using the TCGA database to investigate the expression of MT1G in GC. RT-qPCR and Western blot were used to detect the expression of MT1G, ferroptosis related proteins, autophagy related proteins and ARNTL clock autophagy related proteins in Hgc27, MKN45 and AGS cell lines. Exploring the biological functions of MT1G overexpressing GC cell lines through wound healing and transwell experiments. Use specific fluorescence probes to examine mitochondrial membrane potential and Fe2+ fluorescence intensity. Using immunoprecipitation analysis (CO-IP) to elucidate the association between GC cell lines GPX4, SQSTM and ARNTL. Use flow cytometry to detect ROS expression. Observation of autophagy related morphological changes in cells using transmission electron microscopy. Compared with gastric mucosal cell lines, the expression of MT1G is decreased in three gastric cancer cell lines (Hgc27, MKN45 and AGS). Overexpression of MT1G inhibits the proliferation, migration, and invasion functions of GC cells, reduces SOD and GSH content, increases MDA content, cause the mitochondrial membrane potential to weaken and promote the transformation of JC-1 aggregates to JC-1 monomer, increases Fe2+, affects ROS, and reduces GPX4 and SLC7A11 protein expression, promoting ferroptosis. Overexpression of MT1G promotes the transformation of LC3B I to LC3B II, reduces SQSTM1 protein expression, and leads to the appearance of more autophagosomes and autolysosomes at low magnification. At high magnification, mitochondrial autophagy, endoplasmic reticulum autophagy, lipid droplet autophagy, and wrinkled mitochondrial cristae are observed, promoting autophagy. Overexpression of MT1G inhibits GPX4, thereby affecting SQSTM1 as a vector to promote ARNTL autophagy and EGLN2, promoting ARNTL clock autophagy through the GPX4/SQSTM1 axis. Our research findings elucidate that overexpression of MT1G promotes iron autophagy centered around ARNTL in GC cells via the GPX4/SQSTM1 axis, thereby inhibiting GC cell function and providing a new molecular mechanism and therapeutic target for the development of GC.

Toxic effects of chlorpyrifos on biochemical composition, enzyme activity and gill surface ultrastructure of three species of small fishes from India

The effects of chlorpyrifos, a frequently detected organophosphate in aquatic ecosystems, on biochemical (protein and glycogen) contents and oxidative enzyme activities (catalase and lipid peroxidation) in liver, muscle and gill tissues of three freshwater fish Trichogaster fasciata, Mystus vittatus and Heteropneustes fossilis were evaluated after 21-day exposure to 1 and 10% of 96 h LC50 of this pesticide, which were 1.63 and 16.3 µg L-1; 5.87 and 58.7 µg L-1 and 2.12 and 21.2 µg L-1, respectively. On comparing with control, significant reductions in protein concentration were found in liver, muscle and gill of the three fishes treated with both higher as well as lower concentrations of the pesticide except in gill of M. vittatus and liver of H. fossilis treated with the lower concentrations. Glycogen content reductions were significant in the liver and muscle of the fishes, as well as gill tissue of T. fasciata treated with the two pesticide concentrations. Significant elevations of catalase activity were found in liver of the three fishes treated with the higher concentrations, in muscle tissues of both T. fasciata and M. vittatus treated with both the concentrations and in gills of the three fishes except H. fossilis treated with the lower concentration of the pesticide. Significant elevations of lipid peroxidation level were also found in liver of all the three fish species treated with the higher concentrations, in the muscle tissue of M. vittatus as well as in the gill of T. fasciata and H. fossilis treated with both the concentrations of the pesticide. Chlorpyrifos exposed gill ultrastructure of T. fasciata, M. vittatus and H. fossilis revealed concentration-dependent effects of the pesticide on gill surface ultrastructure which include distortion of primary and secondary lamellae, deterioration of pavement cell and microridge structures, extrusion of red blood cells (RBCs), secretion of mucous layer on filament, sloughing of primary lamellae and clumping of secondary lamellae. The present study parameters could serve as useful biomarkers for evaluating the risk of pesticide toxicity to fish. These findings also point out the possible health risks to the consumers of these fish captured from contaminated water bodies.

Poor semen quality is associated with impaired antioxidant response and acute phase proteins and is likely mediated by high cortisol levels in Brucella-seropositive dromedary camel bulls

Brucellosis in dromedary camel bulls leads to either temporary or permanent loss of fertility. Camel brucellosis is associated with both orchitis and epididymitis. However, the clinical signs of camel brucellosis are not clear as those in cattle. Therefore, this study aimed to diagnose camel brucellosis based on a serological screening using Rose Bengal plate test (RBPT) followed by competitive ELISA. To understand the impact of brucellosis on camel bull fertility, this study aimed to examine the semen characteristics, evaluate the testicular histopathology, examine hormonal profile, antioxidants and acute phase proteins (APP). A total of 150 mature bulls were used in this study. Blood samples were collected for serological, hormonal, and biochemical analysis. This study revealed that 6.6% and 7.3% of the examined bulls were Brucella-seropositive using RBPT and competitive ELISA, respectively. The Brucella-seropositive dromedary bulls showed poor semen quality, pathological changes orchitis, and lower testosterone. Moreover, our findings showed a higher cortisol level, and significant impairments in the measured APP and antioxidants in Brucella-seropositive bulls. In conclusion, the Brucella-seropositive dromedary bulls showed lower fertility due to poor semen quality and lower testosterone levels. Such lower fertility is likely mediated by high cortisol levels, and impaired APP and antioxidants' defense response.

Iota-Carrageenan from Marine Alga Solieria filiformis Prevents Naproxen-Induced Gastrointestinal Injury via Its Antioxidant and Anti-Inflammatory Activities

Background: Non-steroidal anti-inflammatory drugs (NSAIDs) are widely used in therapy due to their anti-inflammatory and analgesic properties. However, their clinical use is often associated with gastrointestinal complications. Thus, this study aimed to investigate the protective effect of a sulfated iota-carrageenan isolated from the marine alga Solieria filiformis (IC-Sf) against naproxen-induced gastrointestinal injury. Methods: Parameters of gastrointestinal injury, secretory and motor functions, and toxicity were evaluated. Results: The results demonstrated that IC-Sf significantly reduced naproxen-induced gastrointestinal macroscopic injury, with a maximum effect observed at 30 mg/kg. IC-Sf also preserved gastrointestinal antioxidant defense and prevented lipid peroxidation, with a reduction in the non-protein sulfhydryl group (NP-SH) and malondialdehyde (MDA) concentrations induced by naproxen. Additionally, IC-Sf mitigated naproxen-induced gastrointestinal inflammation, as evidenced by reduced myeloperoxidase (MPO) activity, tumor necrosis factor-alpha (TNF-α), and interleukin-1 beta (IL-1β). IC-Sf did not alter gastric secretion or gastrointestinal motility. In addition, the animals treated with IC-Sf did not present toxic effects. Conclusions: In conclusion, IC-Sf protected the gastrointestinal tract against the harmful effects of naproxen by inhibiting the inflammatory response and lipid peroxidation, suggesting its potential as a new therapeutic agent or food additive.

Tanacetum parthenium and parthenolide increase defensive agents and promote antisecretory activity supporting their gastroprotective actions in rodents

Tanacetum parthenium is popularly used to treat gastric disorders. However, the gastroprotective activity has not yet been tested. This study evaluated the anti-ulcer gastric effects of hydroalcoholic extract from T. parthenium (HETp) and parthenolide (PTL), its bioactive compound. Our findings revealed a significant reduction in HETp (10, 30, or 100 mg/Kg) and PTL (5 and 50 mg/Kg) in ethanol and piroxicam-induced ulcers, and this evidence was corroborated histologically. In addition, we explored the acid antisecretory activity by the pylorus ligation. Moreover, in mice pre-treated with the inhibitors indomethacin, L-NAME, and yohimbine, the antiulcerogenic effects of HETp and PTL were abolished, suggesting the involvement of nitric oxide, adrenergic receptors and prostaglandins in gastroprotective effects. Additionally, HETp and PTL prevented the depletion of SOD and CAT and decreased the activity of MPO and the levels of GSH and LPO. The results suggest that gastroprotection of HETp and PTL involves different pharmacological pathways.

Molecular mechanisms underlying methotrexate-induced intestinal injury and protective strategies

Methotrexate (MTX) is a folic acid reductase inhibitor that manages various malignancies as well as immune-mediated inflammatory chronic diseases. Despite being frequently prescribed, MTX's severe multiple toxicities can occasionally limit its therapeutic potential. Intestinal toxicity is a severe adverse effect associated with the administration of MTX, and patients are significantly burdened by MTX-provoked intestinal mucositis. However, the mechanism of such intestinal toxicity is not entirely understood, mechanistic studies demonstrated oxidative stress and inflammatory reactions as key factors that lead to the development of MTX-induced intestinal injury. Besides, MTX causes intestinal cells to express pro-inflammatory cytokines like interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α), which activate nuclear factor-kappa B (NF-κB). This is followed by the activation of the Janus kinase/signal transducer and activator of the transcription3 (JAK/STAT3) signaling pathway. Moreover, because of its dual anti-inflammatory and antioxidative properties, nuclear factor erythroid-2-related factor 2/heme oxygenase-1 (Nrf2/HO-1) has been considered a critical signaling pathway that counteracts oxidative stress in MTX-induced intestinal injury. Several agents have potential protective effects in counteracting MTX-provoked intestinal injury such as omega-3 polyunsaturated fatty acids, taurine, umbelliferone, vinpocetine, perindopril, rutin, hesperidin, lycopene, quercetin, apocynin, lactobacillus, berberine, zinc, and nifuroxazide. This review aims to summarize the potential redox molecular mechanisms of MTX-induced intestinal injury and how they can be alleviated. In conclusion, studying these molecular pathways might open the way for early alleviation of the intestinal damage and the development of various agent plans to attenuate MTX-mediated intestinal injury.

Nanopolystyrene and phoxim pollution: A threat to hepatopancreas toxicity in Chinese mitten crab (Eriocheir sinensis)

Significant concerns have been raised by the widespread pollutants phoxim (PHO) and nanopolystyrene (NP) in the natural environment. This study evaluated the toxicity effects on the hepatopancreas of Eriocheir sinensis caused by NP and/or PHO at concentrations found in the environment. Subchronic exposure to NP and/or PHO triggered hepatopancreas histological damage within a 21-day exposure period. The NP, PHO, and co-exposure (NPO) groups exhibited fewer blister-like (B) cells, along with the appearance of vacuolation. Furthermore, these exposures induced impairment in the hepatic tubule mucus barrier and mechanical barrier, as evidenced by altered expression of oxidative stress-related genes, mucin-related genes, and TJ-related genes. Additionally, alterations in immunity-related genes and inflammatory cytokine genes expression were observed. The findings showed that hepatopancreas inflammation was caused by both individual and combined exposure to NP and PHO and that the inflammatory response was exacerbated by the co-exposure. The possible pathways of hepatopancreas toxicity were further investigated by transcriptomic analysis. Hepatopancreas inflammation was brought on by subchronic exposure to PHO and co-exposure; this inflammation was exacerbated by co-exposure and was backed by the activation of NF-κB signaling pathway via targeting-related genes. In summary, this research represents the initial documentation, to the best of our understanding of the detrimental effects of exposured to NP and/or PHO at levels found in the environment disrupt the hepatopancreas mucus and mechanical barrier in crustaceans, triggering inflammatory responses. These findings highlight the significance of NP and/or PHO pollution for hepatopancreas health.

The incidence and risk factors of gastrointestinal dysfunction during enteral nutrition in mechanically ventilated critically ill patients

AIM

To assess the occurrence and risk factors of gastrointestinal (GI) dysfunction during enteral nutrition (EN) in critically ill patients supported with mechanical ventilation.

DESIGN

Prospective observational study.

METHODS

Totally 252 patients admitted at a mixed medical-surgical ICU were enrolled. GI symptoms and the potential risk variables were recorded during the first 14 days of EN.

RESULTS

The incidence of GI dysfunction was 65.5%, and the incidence of diarrhoea, constipation, abdominal distension, and upper GI intolerance was 28.2%, 18.3%, 6.7% and 12.3%, respectively. The median onset days of constipation, diarrhoea, abdominal distension and UDI was 3, 5, 5 and 6 days, respectively. Multivariable Cox regression analysis showed a significant relationship between GI dysfunction and age (HR = 2.321, 95% CI: 1.024-5.264, p = 0.004), APACHE-II score at ICU admission (HR = 7.523, 95% CI: 4.734-12.592, p = 0.018), serum albumin level (HR = 0.594, 95% CI: 0.218-0.889, p = 0.041), multidrug-resistant bacteria-positive culture (HR = 6.924, 95% CI: 4.612-10.276, p<0.001), negative fluid balance (HR = 0.725, 95% CI: 0.473-0.926, p = 0.037), use of vasopressor drugs (HR = 1.642, 95% CI: 1.297-3.178, p<0.001), EN way (HR = 6.312, 95% CI: 5.143-11.836, p<0.001), infusion rate (HR = 1.947, 95% CI: 1.135-3.339, p<0.001), and intra-abdominal hypertension (HR = 3.864, 95% CI: 2.360-5.839, p<0.001).

CONCLUSION

Critically ill patients supported with mechanical ventilation are at a high risk of GI dysfunction. Interventions such as the use of laxatives or prokinetic agents, control of EN infusion rate, and maintaining a normal state of hydration, might be beneficial for the prevention of GI dysfunction in critically ill patients.

PATIENT OR PUBLIC CONTRIBUTION

No.

The Role of the Trace Element Selenium in Inflammatory Bowel Disease

One set of chronic gastrointestinal disorders called inflammatory bowel disease (IBD) is defined by persistent, non-specific inflammation. Abdominal pain, hematochezia, diarrhea, and other symptoms are among its clinical signs. Currently, managing and treating IBD remains a significant challenge. Patients with IBD frequently have deficits in trace elements. Selenium (Se) is one of the necessary trace elements for normal organismal function. It has several regulatory effects, including anti-oxidation, anti-inflammatory, and defensive properties, via inducing the synthesis of selenoproteins. Patients with IBD have been shown to have lower Se levels in epidemiologic research studies. Several experimental models of IBD suggest that Se or selenoproteins play a key role in microinflammation. We discuss the relationship between Se and IBD in this review, with an emphasis on a summary of potential mechanisms of action and applications of Se in IBD.

Pharmacological potential of natural medicine Astragali Radix in treating intestinal diseases

Due to changes in diet and lifestyle, the prevalence of intestinal diseases has been increasing annually. Current treatment methods exhibit several limitations, including adverse reactions and drug resistance, necessitating the development of new, safe, and effective therapies. Astragali Radix, a natural medicine utilized for over two millennia, offers unique advantages in treating intestinal ailments due to its multi-component and multi-target properties. This study aims to review the effective components of Astragali Radix that provide intestinal protection and to explore its pharmacological effects and molecular mechanisms across various intestinal diseases. This will provide a comprehensive foundation for using Astragali Radix in treating intestinal diseases and serve as a reference for future research directions. The active components of Astragali Radix with protective effects on the intestines include astragaloside (AS)-IV, AS-III, AS-II, astragalus polysaccharide (APS), cycloastagenol, calycosin, formononetin, and ononin. Astragali Radix and its active components primarily address intestinal diseases such as colorectal cancer (CRC), inflammatory bowel disease (IBD), and enterocolitis through mechanisms including anti-inflammatory actions, antioxidative stress responses, anti-proliferation and invasion activities, regulation of programmed cell death, immunoregulation, restoration of the intestinal epithelial barrier, and modulation of the intestinal microbiota and its metabolites. Consequently, Astragali Radix demonstrates significant intestinal protective activity and represents a promising natural treatment for intestinal diseases. However, the pharmacological actions and mechanisms of some active components in Astragali Radix remain unexplored. Moreover, further comprehensive toxicological and clinical studies are required to ascertain its safety and clinical effectiveness.

Identification of compounds from Origanum compactum and Origanum elongatum using HPLC/UV-ESI-MS and comparative analysis of their antioxidant, antimicrobial, anticoagulant, and antidiabetic properties

The aim was to assess the phytochemical composition, phenolic component levels, and biological properties of the flowering tops of Origanum compactum and Origanum elongatum. The study employed phytochemical assays, spectrophotometric techniques for quantitative analysis of polyphenols, flavonoids, and tannins, and compound identification using HPLC/UV-ESI-MS. The antimicrobial, antioxidant, anticoagulant, and antidiabetic properties were examined both in vitro and in vivo. The results showed that the O. compactum extract had significantly high levels of total polyphenols, measuring 47.368 mg gallic acid equivalents per gram, and flavonoids, measuring 14.839 mg quercetin equivalents per gram. The phytochemical examination of O. compactum revealed that lithospermic acid accounted for 36.82 % of the chemicals detected, followed by salvianolic acid C at 12.57 % and ros-marinic acid at 6.01 %. The main constituents of O. elongatum are salvianolic acid C (14.46 %), luteolin-3-O-glucuronide (13.51 %), salvianolic acid B (12.24 %), rosmarinic acid (7.83 %), and rutin (6.18 %). The results demonstrated different levels of effectiveness against the investigated microorganisms, with the extract from O. compactum exhibiting better activity, particularly against Gram-negative bacteria, certain yeasts, and the fungus Aspergillus niger. The aqueous extracts of both Origanum species demonstrate significant antioxidant activity. O. compactum has a higher total antioxidant capacity (IC50 of 35.083 μg/mL) compared to O. elongatum (IC50 of 77.080 μg/mL). However, O. elongatum has a higher reducing power (35.697 μg/mL) compared to O. compactum (42.563 μg/mL). In vivo evaluations revealed that the aqueous extracts of O. compactum and O. elongatum possess significant antihyperglycemic and anticoagulant properties. The extracts demonstrated a marked reduction in blood glucose levels during the oral glucose tolerance test (OGTT) in Wistar rats and effectively prolonged both prothrombin time (PT) and activated partial thromboplastin time (aPTT), highlighting their ability to inhibit coagulation pathways. Moreover, their comparable efficacy to standard antihyperglycemic medications and absence of severe toxicity, even at high doses, underscore their therapeutic potential for safe and effective treatment applications. Between the two species, O. compactum exhibited superior efficacy in key biological activities such as antioxidant, antimicrobial, and anticoagulant properties, making it a strong candidate for therapeutic applications. This study underscores the value of Origanum species as a rich source of bioactive compounds, offering significant potential in pharmaceuticals, nutraceuticals, and agri-food industries. The findings pave the way for further exploration of their diverse applications.

Metabolomic comparison of postprandial distress syndrome patients with and without duodenal eosinophilia

OBJECTIVE

In functional dyspepsia patients, duodenal mucosal eosinophilia has been associated with early satiety but is not present in all patients suggesting varied pathways to symptom generation. The objective of the current study was to explore metabolic differences comparing those with duodenal mucosal eosinophilia to those without eosinophilia.

METHODS

This study was conducted utilizing an existing biorepository. Patients had plasma samples obtained at the time of endoscopy. All had undergone endoscopy for dyspepsia and reported early satiety. Two groups were identified including those with peak duodenal mucosal eosinophil densities above 30/high power field (N = 28) and those below 30 (N = 16). The fasting plasma samples were analyzed by liquid chromatography/high-resolution mass spectrometry. Significant differences between groups were determined.

RESULTS

The eosinophilia group demonstrated significant elevations in several gamma-glutamyl amino acids. The eosinophilia group had elevations of metabolites associated with oxidative stress including glutathione metabolites (cysteinlyglycine and cys-gly oxidized), and metabolites related to nitric oxide synthesis (arginine, citrulline, ornithine, and dimethylarginine). Eosinophilia was also associated with alterations in lipid metabolism including several long-chain acylcarnitine conjugated fatty acids. Carnitine levels were lower in the eosinophilia group. Lastly, vanillymandelate, a derivative of norepinephrine and epinephrine was elevated in the eosinophilia group.

CONCLUSIONS

In patients with dyspepsia and early satiety, duodenal mucosal eosinophilia is associated with metabolites levels which are consistent with increased oxidative stress and alterations in lipid metabolism. Eosinophilia was also associated with lower carnitine levels. These alterations may contribute to pathophysiology and represent therapeutic targets.

Demystifying the management of cancer through smart nano-biomedicine via regulation of reactive oxygen species

Advancements in therapeutic strategies and combinatorial approaches for cancer management have led to the majority of cancers in the initial stages to be regarded as treatable and curable. However, certain high-grade cancers in the initial stages are still regarded as chronic and difficult to manage, requiring novel therapeutic strategies. In this era of targeted and precision therapy, novel strategies for targeted delivery of drug and synergistic therapies, integrating nanotherapeutics, polymeric materials, and modulation of the tumor microenvironment are being developed. One such strategy is the study and utilization of smart-nano biomedicine, which refers to stimuli-responsive polymeric materials integrated with the anti-cancer drug that can modulate the reactive oxygen species (ROS) in the tumor microenvironment or can be ROS responsive for the mitigation as well as management of various cancers. The article explores in detail the ROS, its types, and sources; the antioxidant system, including scavengers and their role in cancer; the ROS-responsive targeted polymeric materials, including synergistic therapies for the treatment of cancer via modulating the ROS in the tumor microenvironment, involving therapeutic strategies promoting cancer cell death; and the current landscape and future prospects.

Flavopiridol induces cell cycle arrest and apoptosis by interfering with CDK1 signaling pathway in human ovarian granulosa cells

Several clinical trials have been conducted to evaluate the use of flavopiridol (FP) to treat a variety of cancers, and almost all cancer drugs were found to be associated with toxicity and side effects. It is not clear whether the use of FP will affect the female reproductive system. Granulosa cells, as the important cells that constitute the follicle, play a crucial role in determining the reproductive ability of females. In this study, we investigated whether different concentrations of FP have a toxic effect on the growth of immortalized human ovarian granulosa cells. The results showed that FP had an inhibitory effect on cell proliferation at a level of nanomole concentration. FP reduced cell proliferation and induced apoptosis by inducing mitochondrial dysfunction and oxidative stress, as well as increasing BAX/BCL2 and pCDK1 levels. These results suggest that toxicity to the reproductive system should be considered when FP is used in clinical applications.

Oral Administration of Bioactive Nanoparticulates for Inflammatory Bowel Disease Therapy by Mitigating Oxidative Stress and Restoring Intestinal Microbiota Homeostasis

The management of inflammatory bowel disease (IBD) continues to pose significant challenges due to the absence of curative therapies and a high rate of recurrence. Therefore, it is imperative to explore novel approaches to enhance the efficacy of IBD therapy. Herein, a bioactive nanoparticulate s is tailored designed to achieve a "Pull-Push" approach for efficient and safe IBD treatment by integrating reactive oxygen species (ROS) scavenging (Pull) with anti-inflammatory agent delivery (Push) in the inflammatory microenvironment. The multifunctional nanomedicine, designated MON-PAMAM@SASP, is developed through the encapsulation of sulfasalazine (SASP), a widely utilized clinical drug for the treatment of IBD, within cationic diselenide-bridged mesoporous organosilica nanoparticles (MONs) that possess significant antioxidant properties. Herein, poly(amidoamine) (PAMAM) endows the original MONs with positive charge characteristics. The MON-PAMAM@SASP not only displays the remarkable capability of neutralizing ROS to ameliorates intestinal damage, but also achieves controllable release of SASP to mitigate intestinal inflammation. Consequently, this nanomedicine effectively mitigates IBD by colitis in mouse models, and our current research has not identified any significant drug toxicity. Beyond regulating inflammatory microenvironment in intestine, treatment with MON-PAMAM@SASP results in increased richness and restores intestinal microbiota homeostasis, thereby mitigating IBD to a certain extent. Together, our work provides a highly versatile "Pull-Push" approach for IBD management and encourages the development of similar nanomedicine to treating multiple inflammatory diseases of gastrointestinal tract.

Bacterial Responses and Material-Cell Interplays With Novel MoAlB@MBene

Developing efficient antibacterial nanomaterials has potential across diverse fields, but it requires a deeper understanding of material-bacteria interactions. In this study, a novel 2D core-shell MoAlB@MBene structure is synthesized using a mild wet-chemical etching approach. The growth of E. coli, S. aureus, and B. subtilis bacteria in the presence of MoAlB@MBene decreased in a concentration-dependent manner, with a prolonged lag phase in the initial 6 h of incubation. Even under dark conditions, MoAlB@MBene triggered the formation of intercellular reactive oxygen species (ROS) and singlet oxygen (1O2) in bacteria, while the bacteria protected themselves by forming biofilm and altering cell morphology. The MoAlB@MBene shows consistent light absorption across the visible range, along with a distinctive UV absorption edge. Two types of band gaps are identified: direct (1.67 eV) and indirect (0.74 eV), which facilitate complex light interactions with MoAlB@MBene. Exposure to simulated white light led to decreased viability rates of E. coli (20.6%), S. aureus (22.9%), and B. subtilis (21.4%). Altogether, the presented study enhances the understanding of bacteria responses in the presence of light-activated 2D nanomaterials.

Oxidative Stress Mechanism by Gold Compounds: A Close Look at Total ROS Increase and the Inhibition of Antioxidant Enzymes

The antitumor activity of various gold compounds is a promising field of investigation, attracting researchers seeking potential clinical candidates. To advance this research, they explore the complex mechanisms of action of these compounds. Since the discovery of the strong inhibition of thioredoxin reductase by auranofin, the primary mechanism explored has been the inhibition of this enzyme. This inhibition disrupts the redox balance in cells, promoting oxidative stress and triggering cell death. In this review, we analyzed studies from the past decade that measured cellular ROS increase and examined the coordination structures of gold compounds. We also correlate ROS increase with the inhibition of redox-regulating enzymes, thioredoxin reductase, and glutathione reductase, to elucidate the relationship between these cellular effects and chemical structures. Our data compilation reveals that different structures exhibit varying efficacy: some significantly increase ROS production and inhibit thioredoxin reductase or glutathione reductase, while others elevate ROS levels without affecting these target enzymes, suggesting alternative mechanisms of action. This review consolidates critical evidence, enhancing our understanding of the mechanisms by which these gold complexes act and providing valuable insights for developing new therapeutic strategies against tumor cells.

Decreased antioxidant-related superoxide dismutase 1 expression in peripheral immune cells indicates early ethanol exposure

Alcohol consumption increases oxidative stress and imbalances in the antioxidant system, even with ethanol (EtOH) exposure at a young age. This study assessed changes in the antioxidant system following young EtOH exposure in peripheral immunity and measured sensitive indicators of heavy alcohol consumption. We used peripheral blood mononuclear cells (PBMCs) from 197 male university students without smoking habits to examine changes in antioxidant-related gene expression in vitro and in PBMCs. In vitro, the antioxidant system was impaired by EtOH. Next, we examined the expression of 84 antioxidant-related genes in the PBMCs of 162 young adults, among which the superoxide dismutase (SOD) 1 expression was most negatively correlated with alcohol consumption degree. The plasma SOD1 level had the highest area under the curve value (0.806) for heavy alcohol consumption. Our data demonstrated that a decreased SOD1 level is a sensitive indicator of an impaired antioxidant system and heavy alcohol consumption with early EtOH exposure.

Genotype-Dependent Variations in Oxidative Stress Markers and Bioactive Proteins in Hereford Bulls: Associations with DGAT1, LEP, and SCD1 Genes

The objective of this study is to assess the influence of genetic polymorphisms in DGAT1, LEP, and SCD1 on the oxidative stress biomarkers and bioactive protein levels in Hereford bulls. A total of sixty-eight bulls were analyzed at 22 months of age to assess growth metrics and carcass quality, with a focus on polymorphisms in these genes. The key markers of oxidative stress, including malondialdehyde (MDA), and the activities of antioxidant enzymes such as glutathione reductase (GluRed), glutathione peroxidase (GPx), and superoxide dismutase (SOD) were measured, alongside bioactive compounds like taurine, carnosine, and anserine. The results show that the TT genotype of DGAT1 is linked to significantly higher MDA levels, reflecting increased lipid peroxidation, but is also associated with higher GluRed and GPx activities and elevated levels of taurine, carnosine, and anserine, suggesting an adaptive response to oxidative stress. The LEP gene analysis revealed that the CC genotype had the highest MDA levels but also exhibited increased GPx and SOD activities, with the CT genotype showing the highest SOD activity and the TT genotype the highest total antioxidant status (TAS). The SCD1 AA genotype displayed the highest activities of GluRed, GPx, and SOD, indicating a more effective antioxidant defence, while the VA genotype had the highest MDA levels and the VV genotype showed lower MDA levels, suggesting protective effects against oxidative damage. These findings highlight genotype specific variations in the oxidative stress markers and bioactive compound levels, providing insights into the genetic regulation of oxidative stress and antioxidant defences, which could inform breeding strategies for improving oxidative stress resistance in livestock and managing related conditions.

Screening Antioxidant Components in Yiwei Decoction Using Spectrum-Effect Relationship and Network Pharmacology

Yiwei decoction (YWD) is a classic prescription with the function of nourishing stomach yin. In this study, the effective components of antioxidant activity of YWD and its possible mechanism were discussed from the point of view of spectral effect relationship and network pharmacology. Firstly, the fingerprints of 10 batches of YWD were established by UPLC-PDA technique, and the 1,1-diphenyl-2-picryl-hydrazyl radical (DPPH) scavenging rate and total antioxidant capacity (T-AOC) were used as the indicators for antioxidant activity in vitro. Then, the spectral effect relationship between the fingerprint profiles and antioxidant capacity was analyzed through grey relational analysis (GRA) and orthogonal projections to latent structures (OPLS). In addition, network pharmacology was employed to predict the potential mechanisms of YWD in the treatment of antioxidant-related diseases. The spectrum-effect relationship indicated that three common peaks were likely to be the most decisive active components, identified as verbascoside, psoralen, and vitexin, respectively. Based on network pharmacology analysis, a total of 83 target genes shared by the active components and antioxidant-related diseases were collected. AKT1, HSP90AA1, SRC, CASP3, and MTOR were closely related to antioxidant therapy and considered as core therapeutic targets. The potential mechanisms of YWD were obtained through gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG). Finally, molecular docking simulations were conducted to evaluate the binding activities between the core therapeutic targets and corresponding compounds. The excellent core protein-compound complexes obtained by molecular docking were simulated by molecular dynamics simulation. The results showed that the active compounds had good binding ability with the selected targets. This study successfully identified the effective components of YWD and predicted the potential targets and pathways, which provided a new idea for the application of YWD in the treatment of antioxidant stress in the future. In addition, the potential active components provide valuable implications for drug screening of related diseases.

Therapeutic potential of Astragalus membranaceus-Pueraria lobata decoction for the treatment of chemotherapy bowel injury

Intestinal mucositis (IM) is one of the most serious side effects of the chemotherapeutic agent irinotecan (CPT-11). Astragalus membranaceus-Pueraria lobata decoction is from the ancient medical book Zhengzhihuibu, has been reported to be used for the treatment of diabetes and hypertension. However, the beneficial effect and mechanism of AP on chemotherapy intestinal mucositis (CIM) remain largely unknown. This study aimed to investigate the efficacy and mechanism of Astragalus membranaceus-Pueraria lobata decoction (AP) in treating CIM. The beneficial effect and mechanism of AP on chemotherapy intestinal mucositis (CIM) were detected using Drosophila model, and combination with RT qPCR, transcriptomics. AP supplementation could significantly alleviate the CPT-11-induced body injury in Drosophila, such as increasing the survival rate, recovering the impaired digestion, improving the movement, and repairing the reproduction and developmental processes. Administration of AP remarkably alleviated the IM caused by CPT-11, including inhibiting the excretion, repairing the intestinal atrophy, improving the acid-base homeostasis imbalance, and inhibiting the disruption of intestinal structure. Mechanistic studies revealed that the protective role of AP against CPT-11 induced intestinal injury was regulated mainly by inhibiting immune-related Toll and Imd pathways, and enhancing the antioxidant capacity. Taken together, these results suggest that AP may be a novel agent to relieve CIM.

The impact of traditional Chinese medicine and dietary compounds on modulating gut microbiota in hepatic fibrosis: A review

Traditional Chinese medicine (TCM) and dietary compounds have a profound influence on the regulation of gut microbiota (GM) in hepatic fibrosis (HF). Certain substances found in both food and herbs that are edible and medicinal, such as dietary fiber, polyphenols, and polysaccharides, can generate beneficial metabolites like short-chain fatty acids (SCFAs), bile acids (BAs), and tryptophan (Trp). These compounds contribute to regulate the GM, reduce levels of endotoxins in the liver, and alleviate fibrosis and inflammation in the liver. Furthermore, they enhance the composition and functionality of GM, promoting the growth of beneficial bacteria while inhibiting the proliferation of harmful bacteria. These mechanisms mitigate the inflammatory response in the intestines and maintain the integrity of the intestinal barrier. The purpose of this review is to analyze how the GM regulates the pathogenesis of HF, evaluate the regulatory effect of TCM and dietary compounds on the intestinal microflora, with a particular emphasis on modulating flora structure, enhancing gut barrier function, and addressing associated pathogenic factors, thereby provide new insights for the treatment of HF.

Stimulus-responsive drug delivery nanoplatforms for inflammatory bowel disease therapy

Inflammatory bowel disease (IBD) manifests as inflammation in the colon, rectum, and ileum, presenting a global health concern with increasing prevalence. Therefore, effective anti-inflammatory therapy stands as a promising strategy for the prevention and management of IBD. However, conventional nano drug delivery systems (NDDSs) for IBD face many challenges in targeting the intestine, such as physiological and pathological barriers, genetic variants, disease severity, and nutritional status, which often result in nonspecific tissue distribution and uncontrolled drug release. To address these limitations, stimulus-responsive NDDSs have received considerable attention in recent years due to their advantages in providing controlled release and enhanced targeting. This review provides an overview of the pathophysiological mechanisms underlying IBD and summarizes recent advancements in microenvironmental stimulus-responsive nanocarriers for IBD therapy. These carriers utilize physicochemical stimuli such as pH, reactive oxygen species, enzymes, and redox substances to deliver drugs for IBD treatment. Additionally, pivotal challenges in the future development and clinical translation of stimulus-responsive NDDSs are emphasized. By offering insights into the development and optimization of stimulus-responsive drug delivery nanoplatforms, this review aims to facilitate their application in treating IBD. STATEMENT OF SIGNIFICANCE: This review highlights recent advancements in stimulus-responsive nano drug delivery systems (NDDSs) for the treatment of inflammatory bowel disease (IBD). These innovative nanoplatforms respond to specific environmental triggers, such as pH reactive oxygen species, enzymes, and redox substances, to release drugs directly at the inflammation site. By summarizing the latest research, our work underscores the potential of these technologies to improve drug targeting and efficacy, offering new directions for IBD therapy. This review is significant as it provides a comprehensive overview for researchers and clinicians, facilitating the development of more effective treatments for IBD and other chronic inflammatory diseases.

Vitamin C in the Management of Thyroid Cancer: A Highway to New Treatment?

Thyroid cancer (TC) is the most common endocrine malignancy, with an increased global incidence in recent decades, despite a substantially unchanged survival. While TC has an excellent overall prognosis, some types of TC are associated with worse patient outcomes, depending on the genetic setting. Furthermore, oxidative stress is related to more aggressive features of TC. Vitamin C, an essential nutrient provided with food or as a dietary supplement, is a well-known antioxidant and a scavenger of reactive oxygen species; however, at high doses, it can induce pro-oxidant effects, acting through multiple biological mechanisms that play a crucial role in killing cancer cells. Although experimental data and, less consistently, clinical studies, suggest the possibility of antineoplastic effects of vitamin C at pharmacological doses, the antitumor efficacy of this nutrient in TC remains at least partly unexplored. Therefore, this review discusses the current state of knowledge on the role of vitamin C, alone or in combination with other conventional therapies, in the management of TC, the mechanisms underlying this association, and the perspectives that may emerge in TC treatment strategies, and, also, in light of the development of novel functional foods useful to this extent, by implementing novel sensory analysis strategies.

Tuning Antioxidant Function through Dynamic Design of Chitosan-Based Hydrogels

Dynamic chitosan-based hydrogels with enhanced antioxidant activity were synthesized through the formation of reversible imine linkages with 5-methoxy-salicylaldehyde. These hydrogels exhibited a porous structure and swelling capacity, influenced by the crosslinking degree, as confirmed by SEM and POM analysis. The dynamic nature of the imine bonds was characterized through NMR, swelling studies in various media, and aldehyde release measurements. The hydrogels demonstrated significantly improved antioxidant activity compared to unmodified chitosan, as evaluated by the DPPH method. This research highlights the potential of developing pH-responsive chitosan-based hydrogels for a wide range of biomedical applications.

Casearia sylvestris var. lingua (Càmbess.) Eichler leaves aqueous extract improves colon inflammation through mucogenic, antioxidant and anti-inflammatory actions in TNBS- induced IBD rats

ETHNOPHARMACOLOGICAL RELEVANCE

Casearia sylvestris var. lingua (Cambess.) Eichler, a member of the Salicaceae family, holds a prominent place in traditional medicine across various cultures due to its versatile therapeutic properties. Historically, indigenous communities have utilized different parts of the plant, including leaves, bark, and roots, to address a wide array of health conditions. Traditional uses of C. sylvestris var. lingua encompasses the treatment of gastrointestinal disorders, respiratory infections, wound healing, inflammation, and stomach ulcers. Pharmacological studies have demonstrated the plant's antimicrobial, anti-inflammatory, antioxidant, analgesic, gastroprotective, and immunomodulatory effects. This signifies the first scientific validation report for C. sylvestris var. lingua regarding its effectiveness against ulcerative colitis. The report aims to affirm the traditional use of this plant through pre-clinical experiments.

AIM OF THE RESEARCH

This work uses an aqueous extract from C. sylvestris var. lingua leaves (AECs) to evaluate the acute anti-ulcerative colitis efficacy in rat and HT-29 (human colorectal cancer cell line) models.

METHODS

To determine the secondary metabolites of AECs, liquid chromatography with a diode array detector (LC-DAD) study was carried out. 2,4,6-trinitrobenzenesulfonic acid (TNBS, 30 mg/0.25 mL EtOH 30% v/v) was used as an enema to cause acute colitis. Three days were spent giving the C. sylvestris var. lingua extract orally by gavage at dosages of 3, 30, and 300 mg/kg. The same route was used to deliver distilled water to the vehicle and naïve groups. After the animals were sacrificed on the fourth day, intestinal tissues were taken for histological examination and evaluation of biochemical tests such as those measuring superoxide dismutase (SOD), reduced glutathione (GSH), catalase (CAT), malondialdehyde (MDA), nitrite/nitrate, myeloperoxidase (MPO) activity. Additionally, interleukin 1 beta (IL-1β), tumor necrosis factor alpha (TNF-α), and interleukin 10 (IL-10), were conducted on the intestinal tissues. Additionally, an MTT assay was used to evaluate the effect of AECs on the viability of HT-29 cells. Additionally, a molecular docking study was carried out to compare some potential target proteins with identified chemicals found in AECs.

RESULTS

LC-DAD analysis identified five compounds (caffeic acid, ellagic acid, ferulic acid, gallic acid, and quercetin) in AECs. Pre-administration of AECs (3; 30; 300 mg/kg) and mesalazine (500 mg/kg) reduced macroscopic scores (55%, 47%, 45%, and 52%, p < 0.001) and ulcerated areas (70.3%, 70.5%, 57%, and 56%, p < 0.001), respectively. It also increased SOD, GSH, and CAT activities (p < 0.01), while decreasing MDA (p < 0.001), nitrite/nitrate (p < 0.05), and MPO (p < 0.001) activities compared to the colitis group. Concerning inflammatory markers, significant modulations were observed: AECs (3, 30, and 300 mg/kg) lowered levels of IL-1β and TNF-α (p < 0.001) and increased IL-10 levels (p < 0.001) compared to the colitis groups. The viability of HT-29 cells was suppressed by AECs with an IC50 of 195.90 ± 0.01 μg/mL (48 h). During the molecular docking analysis, quercetin, gallic acid, ferulic acid, caffeic acid, and ellagic acid demonstrated consistent binding affinities, forming stable interactions with the 3w3l (TLR8) and the 3ds6 (MAPK14) complexes.

CONCLUSION

These results imply that the intestinal mucogenic, anti-inflammatory, and antioxidant properties of the C. sylvestris var. lingua leaf extract may be involved in its therapeutic actions for ulcerative colitis. The results of the in silico study point to the possibility of quercetin and ellagic acid interacting with P38 and TLR8, respectively, in a beneficial way.