Resveratrol Group Research Articles

Dynamic changes of MMPs during cerebral aneurysm formation in rats and the effect of resveratrol on MMP expression.

To investigate the expression of matrix protein metalloenzymes (MMPs) during cerebral aneurysm (CA) formation and assess the effects of resveratrol (RES) on MMP expression and CA prevention. Male Sprague-Dawley rats were randomly divided into three groups: sham-operated, CA, and RES groups. CA models were constructed by ligating the renal and carotid arteries of SD rats. The RES group received a diet mixed with RES (50 mg/kg), while the CA group was given normal feed; the sham-operated group underwent simulated surgery without ligation and received normal feed. HE staining was used to observe the pathological changes in the cerebral artery aneurysm wall. Immunofluorescence (IF) staining and RT-PCR were used to detect the expression of MMP-2 and MMP-9, as well as oxidative stress markers in the cerebral artery wall tissues of rats at 1-, 2-, and 3-months post-surgery. HE staining reveled that after ligation, the cerebral artery walls of SD rats exhibited irregular thickness, twisted morphology, abnormal nuclear morphology of the cells, and infiltration of inflammatory cells, confirming the successful establishment of CA model. Meanwhile, the infrared spectrogram of the RES purified from Tiger Balm closely matched that of the standard, confirming successful purification. IF staining indicated that MMP-2 and MMP-9 levels dynamically increased over time in the vessel wall of the CA rats. Subsequently, antioxidant assays showed that RES treatment enhanced antioxidant capacity, with increased levels of superoxide dismutase, glutathione peroxidase, and catalase in the vascular wall tissue. Moreover, after 3 months of RES treatment, IF staining showed a marked reduction in MMP-2 and MMP-9 levels in the vessel walls of CA rats. Meanwhile, HE staining also showed improvements in the wall structure, with a more intact wall and an increased vascular endothelial cell density. RES effectively inhibits the expression of MMP-2 and MMP-9, thereby preventing and delaying the development of CA.

Resveratrol for inflammatory bowel disease in preclinical studies: a systematic review and meta-analysis.

Background: Inflammatory bowel disease (IBD) is a chronic condition that can be managed with treatment, but it is challenging to get IBD cured. Resveratrol, a non-flavonoid polyphenolic organic compound derived from various plants, has a potential effect on IBD. The current research was set out to investigate the therapeutic effects of resveratrol on animal models of IBD. Methods: A comprehensive search of PubMed, Embase, Web of Science, and Chinese databases was performed. The literature search process was completed independently by two people and reviewed by a third person. The risk of bias in the included literature was assessed using the Collaborative Approach to Meta Analysis and Review of Animal Data from Experimental Stroke (CAMARADES) 10-point quality checklist. The meta-analysis utilized Review Manager 5.4 software to evaluate the efficacy of resveratrol, with histopathological index as the primary outcome measure. Subgroup analysis was conducted based on this indicator. Additionally, meta-analyses were carried out on different outcomes reported in the literature, including final disease activity index, final body weight change, colon length, splenic index, and inflammatory factors. Results: After conducting a thorough literature search and selection process, a total of 28 studies were ultimately included in the analysis. It was found that over half of the selected studies had more than five items with low risk of bias in the bias risk assessment. Relevant datas from included literature indicated that the histopathological index of the resveratrol group was significantly lower than that of the control group (WMD = -2.58 [-3.29, -1.87]). Subgroup analysis revealed that higher doses of resveratrol (>80mg/kg) had a better efficacy (WMD = -3.47 [-4.97, -1.98]). Furthermore, The data summary and quantitative analysis results of SI and colon length also showed that resveratrol was effective in alleviating intestinal mucosal pathological injury of IBD. In terms of biochemical indicators, the summary analysis revealed that resveratrol affected interleukin-1β (IL-1β), interleukin-6 (IL-6), interleukin-8 (IL-8), interleukin-10 (IL-10), tumor necrosis factor-α (TNF-α), transforming growth factor-β (TGF-β), interferon-γ (IFN-γ), malondialdehyde (MDA), myeloperoxidase (MPO), superoxide dismutase (SOD), and prostaglandin E2 (PGE2) significantly. These effects may be attributed to the mechanism of resveratrol in regulating immune response and inhibiting oxidative stress. Conclusion: This review suggests that resveratrol demonstrated a notable therapeutic impact in preclinical models of IBD, particularly at doses exceeding 80mg/kg. This efficacy is attributed to the protective mechanisms targeting the intestinal mucosa involved in the pathogenesis of IBD through various pathways. As a result, resveratrol holds promising prospects for potential clinical use in the future.

EFFECT OF RESVERATROL AND QUERCETİN ON INTESTİNAL ISCHEMİA REPERFUSİON INJURY İN RATS

Aim: Intestinal ischemia reperfusion (I/R) injury is an emergency condition with a high mortality rate and early diagnosis is very difficult. In this study, we aimed to examine the biochemical and histopathological effects of resveratrol and quercetin on intestinal I/R injury model.
 Material and Method: In our study, 56 male Sprague-Dawley rats weighing 250-300 g were randomly divided into 7 groups consisting of 8 rats. Groups were control group (group 1), saline group (group 2), ethanol group (group 3), resveratrol group (group 4) (30mg/kg), quercetin group (group 5) (30mg/kg), resveratrol+quercetin group A (group 6) (15 mg/kg+15 mg/kg), resveratrol+quercetin group B (group 7) (30 mg/kg+30 mg/kg). At the end of the experiment rats intestinal tissues were divided into 2 parts for biochemical and histopathological examination. Total oxidant level (TOS), total antioxidant level (TAS), total thiol [(-SH)+(-S-S-)] (TT), native thiol [-SH] (NT), and protein content levels were measured spectrophotometrically, oxidative stress index (OSI) and disulfide [-S-S-] levels were calculated.
 Results: A statistically significant difference was found between the groups in terms of TOS, OSI, TT, NT and disulfide levels (p

The Effects of Resveratrol Supplementation on the Quality of Life of Diabetic Patients with Neuropathy: Small Randomized Clinical Trial

The diabetic neuropathy complication exerts a considerable decline in the level of patient’s well-being. The main approaches to hamper the progression of diabetic complications and improve patient’s life quality are controlling the glycemic levels and amelioration of the hyperglycemia-induced neuroinflammation, oxidative stress and pain. Supplementation of appropriate anti-inflammatory and anti-oxidants such as resveratrol may therefore be effective in the management of diabetic complications. The aim of this trial was to assess resveratrol’s impact on improving life quality of patients with the neuropathic complication of diabetes. Sixty-one patients with diabetic neuropathy were recruited in this double-blinded placebo-controlled trial. Patients were randomized into the resveratrol (n=31) group; who received a 500mg resveratrol capsule once daily concomitantly with the conventional hypoglycemic agents for three months, and the placebo (n=30) group. From each group 25 patients completed the study. The quality of life (QoL) of the patients was estimated utilizing RAND 36-item survey questionnaire. Fasting blood glucose levels were analyzed at the baseline and on the last day of the 3rd month. There was a significant decrement (p< 0.001) in the fasting serum glucose level of the patients supplemented with resveratrol at the end of the 3rd month, in comparison with the patient using the placebo. There was also a significant improvement in patient’s severity of pain (p<0.001) as shown in the bodily pain score of the RAND 36 scale and a remarkable (p < 0.05) improvement in physical functioning, physical health, social functioning, emotional well-being, energy/fatigue, and health change subscales of the questionnaire. The study concluded that resveratrol is the polyphenol that has a positive effect on reducing pain associated with diabetic neuropathy and improving the overall QoL of the patient.

Análise quantitativa e qualitativa da neuroinflamação pela toxina beta amilóide 1-42 após tratamento com nanopartículas de resveratrol

Background: This study evaluated the effects of zein nanoparticles with resveratrol on neuroinflammation caused by Alzheimer’s disease. Method: The sample consisted of 30 animals divided into control (C), positive control (CP), white nanoparticles (NB), resveratrol nanoparticles (NR) and resveratrol (R) groups. The animals received 10 mg/kg of resveratrol or nanoparticles according to the group, daily, for 15 days, oral administration. Afterward, they weresubmitted to immunohistochemical (IHC) analyses. Results: the IHC showed that there was no change in the morphological brain composition in the NR and C groups. Conversely, in the CP, NB, and R groups, changes in the deposition of Anti Tau were observed. The NR group showed a normal projection of taurine in the axon, which was not presented in the same way in the other groups. The CD68 marker showed no microglial activation in the R and C groups. Quantitative analyses of Anti Beta-Amyloid in the NR group showed a statistical difference comparedto the CP, NB, and R groups, whereas the Anti Tau analysis showed a significant difference between the CP and NR groups. The CD68 marker showed a significant difference between the C and NR groups. The analysis of cytokines showed a significant difference in TNF-α between the C and CP groups, C and NB groups, CP and NR groups, and NB and NR groups. IL-6 and InF-δ showed no significant difference between all groups. IL-10 showed significant differences between the C and NR groups, C and R groups, and CP and NR groups. Conclusion: NR prevented the evolution of neuroinflammation.

The Effects of Resveratrol, Gallic Acid, and Piperine on the Expression of miR-17, miR-92b, miR-181a, miR-222, BAX, BCL-2, MCL-1, WT1, c-Kit, and CEBPA in Human Acute Myeloid Leukemia Cells and Their Roles in Apoptosis.

MicroRNAs (miRs) play a crucial role in the leukemogenesis and the prognosis of acute myeloid leukemia (AML). This study investigated the therapeutic effects of resveratrol, gallic acid, and piperine as natural anticancer agents on the HL-60 cell line and their roles in apoptosis. In this experimental study, quantitative analysis of miRs, including miR-17, miR-92b, miR-181a, and miR-222, were performed in 150 newly diagnosed patients with AML by real-time PCR assay. HL-60 cell viability as well as the expression of miRs, BAX, BCL-2, MCL-1, WT1, c-Kit, and CEBPA, were also assessed after transfection with the LNA-miRs and treatment with resveratrol, gallic acid, and piperine. The expression of miR-17 and miR-181a decreased significantly in LNA-anti-miRs. Although HL-60 cell viability decreased in LNA-anti-miR-222, miR-17, and miR-92b, blockade of miR-181a increased the cell viability. Besides, the cell viability increased merely in the piperine-treated group. Compared to untreated cells, miR-17 and miR-92b expression significantly increased in gallic acid- and resveratrol-treated cells. In HL-60 cells treated with resveratrol, gallic acid, and piperine, the expression of miR-181a was also increased significantly. The expression of BAX was also increased in resveratrol and piperine-treated groups. Compared to untreated cells, the expression of c-Kit increased significantly in the piperine-treated group; however, it decreased in the resveratrol-treated group. LNA-anti-miRs may be a promising agent for the treatment of AML. All three compounds used in this study showed anticancer effects, which can exert the desired outcome in patients with AML.

Physical activity, grape juice, red wine and resveratrol effects in cardiac remodeling of Wistar rats submitted to a high fat diet

Background: The association between regular physical activity and the polyphenol-rich drinks in models with a high fat diet, has not been sufficiently elucidated. Objective: The objective was to study the effects of the association among regular physical activity and polyphenol-rich drinks consumption in lipid profile and cardiac remodeling of Wistar rats submitted to the high fat diet. Methods: Rats Wistar, 90 days, 05 groups (n=10/group): Control Group (CG); High Fat Group (HG); Resveratrol Group (RG); Grape Juice Group (JG); Red Wine Group (WG); HG, RG, JG and WG received a high fat diet (20%). The animals performed a treadmill running protocol for 60 days. After, blood was collected for biochemical evaluation and heart was removed for histological analysis. Variables were expressed as mean ± standard deviation. ANOVA one way and Bonferroni or Tuckey`s as post-test, when appropriate, p < 0.05. Results: JG show higher total cholesterol (72.0 ±8.9 p<0.05) and HDL (28.0 ± 2.0 p<0.05) in relation to CG (total cholesterol = 57.8 ± 8.1, HDL = 24.4 ± 2.9). Collagen concentration: HG (9.65%, p<0.05) presented higher concentration in relation to the CG (3.68%), RG (4.73%), JG (3.57%) and WG (6.59%). Conclusions: It is concluded that the association between physical activity and drinks rich in polyphenols was able to protect the heart tissue from damage caused by the high fat diet.

Effect of resveratrol on haematological changes in diabetic-malaria infected wistar rats

The effect of resveratrol on haematological changes in diabetic-malaria infected rats was investigated. Five of six groups of male Wistar rats were induced with type 2 diabetes, followed by inoculation with malaria parasites. Four groups of the diabetic-malaria infected rats were orally given: low dose resveratrol (50 mg/kg), high dose resveratrol (100 mg/kg), Metformin (100 mg/kg) and Artesunate (5 mg/kg) respectively for six days after malaria inoculation. Administration of resveratrol, metformin and artesunate to diabetic-malaria infected rats significantly (p < 0.05) decreased the blood glucose level (BGL) on days 3 and 6 post-inoculation. The high dose resveratrol (RSV 100) group showed a significant (p<0.05) increase in red blood cell counts, although a significant (p < 0.05) decrease of Packed Cell Volume was recorded in the low dose resveratrol group. There was no significant (p>0.05) difference for the values of total WBC counts across the four groups of the diabetic-malaria infected rats, but the differential WBC counts (dWBCC) were significantly (p<0.05) affected. High dose resveratrol administration significantly (p < 0.05) reversed the dWBCC. The diabetic-malarial infected group showed significant (p<0.05) decrease in average RBC; the average parasites and average infected RBC counts were significantly (p<0.05) higher than that in the resveratrol groups. While, Metformin and Artesunate groups showed a further decline in parasitaemia. These findings indicate that Resveratrol decreased BGL and improved hematological parameters and suppressed parasitaemia in diabetic-malarial infected rats.

Resveratrol alleviates heat-stress-induced impairment of the jejunal mucosa through TLR4/MAPK signaling pathway in black-boned chicken

Heat stress in chickens caused by high temperatures in summer is a serious issue faced by the poultry industry globally, which reduces product quality. The aim of this study is to investigate the role of resveratrol in alleviating heat stress injury and inflammatory response of jejunal mucosa in black-boned chickens through TLR4/MAPK signaling pathway. In total, 240 black-boned chickens (28-day old) were randomly divided into 4 treatment groups as follows. The normal temperature (NT) and normal temperature with resveratrol (NT+Res) groups received a basal diet without and with 400 mg/kg resveratrol, respectively, and treated at 24℃ ± 2℃, 24 h/d. The high temperature (HT) and high temperature with resveratrol (HT+Res) groups received basal diet without and with 400 mg/kg resveratrol, respectively, and treated at 37℃ ± 2℃ for 8 h/d and 24°C ± 2°C for the rest of the time for 12 d. The results revealed the heat-stress responses impaired the villous structure of the jejunum, causing a rough and uneven surface of the jejunal villus, and local intestinal villi were even more prone to rupture. However, resveratrol significantly improved the morphology and structure of jejunal mucosa under heat stress. Heat stress increased the mRNA levels of toll-like receptor 4 (TLR4), c-Jun, c-fos, caspase-3, and p38 (P < 0.05), reduced mRNA level of Bcl-2, and reduced the expression of tight junction proteins Occludin, ZO-1, and Claudin1 (P < 0.05) in the jejunal mucosa. However, resveratrol inhibited the TLR4/ mitogen-activated protein kinase (MAPK) signaling pathway via downregulating TLR4, c-Jun, p38, and caspase-3 (P < 0.05); upregulating Bcl-2 (P < 0.05); decreasing the protein levels of MKK3, p53, and myeloid differentiation factor 88 (MYD88); and increasing the protein levels of Occludin, ZO-1, and Claudin1. In addition, it reduced the levels of JNK and p38 proteins (P < 0.05) and inflammatory factors like tumor necrosis factor-α (TNF-α) in the jejunal mucosa of black-boned chickens under heat stress. In conclusion, resveratrol may play a regulatory role in heat-stress-induced damage and inflammatory response in the intestinal mucosa of black-boned chickens under heat stress.

Resveratrol regulates macrophage recruitment and M1 macrophage polarization and prevents corneal allograft rejection in rats.

Resveratrol is an immune modulator that can reduce M1 macrophage polarization in vitro. Reducing macrophage recruitment and M1 polarization can prevent corneal allograft rejection (CGR). In this study, rat corneal allograft rejection models were established to explore the effects of resveratrol on CGR and macrophages and the underlying mechanisms after corneal transplantation. Corneal allograft models were established, and 100 mg/kg resveratrol was injected intraperitoneally. The corneal allografts were assessed clinically using the Holland rejection scoring system, anterior segment photography, and anterior segment optical coherence tomography. Corneal macrophages, pro-inflammatory cytokines, and corneal lymphatic vessels were detected using hematoxylin and eosin staining, immunofluorescence staining, and real-time quantitative polymerase chain reaction (qRT-PCR). Dendritic cells (DCs) in cervical lymph nodes were explored using flow cytometry. RNA sequencing experiments were conducted to identify the mechanisms through which resveratrol affected CGR. The results were verified using Simple Western analysis. Pro-inflammatory cytokines by macrophages in vitro were measured using qRT-PCR and enzyme-linked immunosorbent assays. Resveratrol significantly prolonged the survival of corneal grafts and reduced graft edema and central corneal thickness. Corneal macrophage recruitment and M1 macrophage polarization decreased significantly after corneal transplantation in the resveratrol group. Resveratrol also reduced pro-inflammatory cytokines in corneal grafts and suppressed the early generation of cornea lymphatic vessels and the recruitment of cornea inflammatory cells 14 days after surgery. Resveratrol decreased the proportion of DCs in ipsilateral cervical lymph nodes. The effect of resveratrol on CGR was related to the phosphatidylinositol 3-kinase/protein kinase-B (PI3K/Akt) pathway. Resveratrol reduced the secretion of pro-inflammatory cytokines by M1 macrophages in vitro. Our findings suggest that resveratrol can reduce corneal macrophage recruitment and M1 macrophage polarization after corneal transplantation in rats and prevent CGR. The PI3K/Akt pathway may be an important mechanism that warrants further research.

Resveratrol improves emamectin benzoate-induced pyroptosis and inflammation of Ctenopharyngodon idellus hepatic cells by alleviating oxidative stress/endoplasmic reticulum stress

Emamectin benzoate (EMB) is the most widely used pesticide in the world and contributes to water pollution. Owing to the lack of a specific antidote, EMB has a severe negative impact on the health of aquatic organisms. Resveratrol (RES), a substance with antioxidant capacity, is secreted by the fruits of many plants. This study was to explore the protection of RES against EMB-induced pyroptosis and inflammatory response in grass carp (Ctenopharyngodon idellus) hepatic liver (L8824) cells by oxidative stress/endoplasmic reticulum (ER) stress. The results showed that compared to the CON group, EMB induced oxidative stress in L8824 cells with the increase of reactive oxygen species (ROS), methane dicarboxylic aldehyde (MDA), and hydrogen peroxide (H2O2) contents and the decrease of total superoxide dismutase (t-sod) and glutathione peroxidase (gsh-px) activities (P < 0.05). In addition, EMB triggered ERS, increasing the relative mRNA expression of protein kinase R-like endoplasmic reticulum kinase (perk), inositol requiring enzyme 1 alpha (ire1α), glucose-regulated protein 78 (grp78), activating transcription factor 4 (atf4), activating transcription factor 6 (atf6), and CCAAT-enhancer-binding protein homologous protein (chop) and the protein expression of eukaryotic initiation factor 2α (eif2α), chop, atf6, and atf4. Meanwhile, EMB further induced pyroptosis by upregulating the mRNA and protein expression of nlrp3, aptamer protein (asc), caspase-1, gsdmd, interleukin-1β (il-1β), and interleukin-18 (il-18). EMB also induced inflammation in L8824 cells by increasing the mRNA expression of interleukin-2 (il-2), interleukin-6 (il-6), tumor necrosis factor-α (tnf-α), and ifn-γ and decreasing the content of interleukin-10 (il-10). However, compared to the EMB group, the oxidant indices and expression of genes related to ER stress, pyroptosis, and pro-inflammatory factors were significantly down-regulated (P < 0.05), whereas the antioxidant indicators and anti-inflammatory factor were significantly up-regulated in the EMB + RES group (P < 0.05). In conclusion, EMB caused hepatocytes pyroptosis and inflammation in grass carp, and RES could alleviate EMB-induced pyroptosis and inflammation in L8824 cells by ameliorating oxidative stress/ER stress.

Ameliorating Effect of Azilsartan on Cisplatin -Induced Ocular Toxicity in Male Rats

Objective: To evaluate the protective effect of Azilsartan against Cisplatin-induced ocular damage by ameliorating the oxidative stress and inflammation status, as well as to compare two different doses of Azilsartan to the Resveratrol. Fifty-six male Wister albino-rats, weighing 270±30 g. The rats were allocated at random into seven groups (n=8 per group), as follows: Group 1 (Healthy control) was given 0.5% CMC orally for the 14 days. Group 2 (Positive control) was given a single injection of 7mg/kg Cisplatin intraperitoneally and then 0.5% CMC orally for the following 14 days. Group 3 was given 3.5mg/kg Azilsartan orally for the following 14 days. Group 4 was given 7mg/kg Azilsartan orally for the following 14 days. Group 5 was given a single injection of 7mg/kg Cisplatin intraperitoneally and then 3.5mg/kg Azilsartan orally for the following 14 days. Group 6 was given a single injection of 7mg/kg Cisplatin intraperitoneally and then 7mg/kg Azilsartan orally for the following 14 days. Group 7 (standard) was given 25mg/kg/day Resveratrol orally for following 14 days.Azilsartan at low dose (3.5mg/kg) showed a significant reduction in IL-1β pro-inflammatory marker level, whereas there was no significant effect on MDA and SOD levels in cisplatin-induced ocular damage. Histologically, there were significant reduction in inflammatory exudates, edema, and inflammatory cells infiltration with both doses. Additionally, there were no significant difference among Azilsartan only received groups and Resveratrol group. Azilsartan shows a promising anti-inflammatory effect in ocular tissue in Cisplatin experimental rat models by significantly reducing IL-1β overexpression, through its potent AT1receptor blocking effect. However, Azilsartan showed a slight effect on MDA levels and marginal effect on SOD levels in Cisplatin-induced ocular toxicity. Furthermore, Azilsartan at a low dose slightly mimicked the effect of resveratrol on normal ocular tissue, suggesting an advancement in prophylactic application in ocular injury.&#x0D; Keywords: Azilsartan, IL-1β, Cisplatin, Ocular Toxicity

Safety and Efficacy of Resveratrol in Healing of Maxillofacial Fractures: A Randomized Controlled Study.

To assess the efficacy of resveratrol in improving functional outcomes following open reduction and internal fixation of maxillofacial fractures. A single-center, randomized, parallel group, prospective, double-blind clinical trial was conducted on 40 patients between the age 20 and 60years, requiring open reduction and internal fixation of maxillofacial fractures. The selected patients were randomly divided into two groups, Group 1 (placebo) and Group 2 (resveratrol) where tablets resveratrol 500mg were given twice daily for 1month following open reduction and internal fixation of fractured segments. Bite force was calculated pre-operatively and on the 1st, 4th, 8th and 12th week postoperatively. Serum markers osteocalcin and alkaline phosphate were calculated pre-operatively and at 4th and 12th week postoperatively. Bite force (690.55 ± 262.00) in the resveratrol group was higher than the placebo group (553.27 ± 300.08) at 12th week postoperatively. However, the difference was non-significant statistically (p = 0.132). Resveratrol group (116.80 ± 55.25) showed better maintenance of serum ALP level as compared to placebo group (107.90 ± 42.99) at 12th week postoperatively, but again it lacked statistical significance (p = 0.573). Resveratrol group after initial reduction at 4th week showed serum osteocalcin levels nearly equal to the preoperative values at 12th week, while the placebo group showed a decline both at 4th and 12th week postoperatively. However, these results were not statistically significant (p = 0.065). There was no statistically significant difference in bite force, serum ALP level and serum osteocalcin levels between placebo group and resveratrol group. Though not statistically significant but early increased level of serum osteogenic markers, better restoration of bite force in group 2 (tab. Resveratrol) indicates toward its possible optimistic role in maxillofacial fracture healing. More studies with larger sample sizes are needed in order to confirm the efficacy of this drug in maxillofacial fracture.

The Beneficial Effect of Resveratrol on the Quality of Frozen-Thawed Boar Sperm.

This study aimed to determine the effect of resveratrol and its optimal concentration on the quality of frozen-thawed (FT) boar sperm. Semen ejaculates were obtained from 13 Duroc boars aged between 1.5 and 3 years. The sperm sample was separated into 7 groups based on the concentrations of resveratrol in the freezing extender, which were 0 (control), 25, 50, 75, 100, 125, and 250 µM, respectively. The sperm was frozen using liquid nitrogen vapor and thawed at 50 °C for 12 s. After thawing, total motility, progressive motility, viability, intact acrosomes, mitochondrial membrane potential and level of MDA were assessed. The supplementation of 50-100 µM resveratrol improved the sperm motility and viability of FT sperm in comparison to the control group (p < 0.05). Furthermore, the 50 µM resveratrol group was significantly more protective than the control group in terms of intact acrosome, mitochondrial membrane potential, and level of MDA (p < 0.05). Nonetheless, the detrimental effect of resveratrol was found at a concentration of 250 µM. In conclusion, the addition of 50-100 µM resveratrol to a freezing extender is the optimal concentration for enhancing the quality of cryopreserved boar sperm.

Improved antioxidant properties of pork patties by replacing fat with resveratrol-loaded MP-CS complex stabilized pickering emulsion.

The characterization and antioxidant ability of Res-loaded MP-CS stabilized Pickering emulsion, and its effects of fat reduction (25%, 50%, 75%, and 100%) in meat patties on pH, color, texture, cooking yield and antioxidant activity were investigated. Fat substitute using emulsion had no significant effect on pH and cooking yield. The addition of emulsion increased L* value and reduced a* value. a* value of meat patties with resveratrol added were higher than those without resveratrol group. Hardness and chewiness of meat patties with 25% and 100% fat replacement was lower than 50% and 75% fat replacement. The addition of emulsion could improve the network structure of meat patties and enhance oxidative stability. Oxidative stability of meat patties was improved by Res-loaded MP-CS stabilized Pickering emulsion. The results showed that MP-CS stabilized Pickering emulsion had great potential to be used as fat substitute for developing low-fat meat products, and the addition of resveratrol can improve the antioxidant ability of substitute fat meat products.

Resveratrol improves palmitic acid‑induced insulin resistance via the DDIT4/mTOR pathway in C2C12 cells.

The present study aimed to establish a model of palmitic acid (PA)‑induced insulin resistance (IR) in C2C12 cells and to determine the mechanism underlying how resveratrol (RSV) improves IR. C2C12 cells were divided into the control (CON), PA, PA + RSV, PA + RSV + DNA damage‑inducible transcript 4 (DDIT4)‑small interfering (si)RNA and PA + RSV + MHY1485 (mTOR agonist) groups. Glucose contents in culture medium and triglyceride contents in cells were determined. Oil red O staining was performed to observe the pathological changes in the cells. Reverse transcription‑quantitative PCR and western blotting were conducted to evaluate the mRNA and protein expression levels, respectively, of DDIT4, mTOR, p70 ribosomal protein S6 kinase (p70S6K), insulin receptor substrate (IRS)‑1, PI3K, AKT and glucose transporter 4 (GLUT4). Compared with in the CON group, glucose uptake was decreased, cellular lipid deposition was increased, phosphorylated (p)‑IRS‑1, p‑mTOR and p‑p70S6K protein expression levels were increased, and p‑PI3K, p‑AKT, GLUT4 and DDIT4 protein expression levels were decreased in the PA group. By contrast, compared with in the PA group, culture medium glucose content and cellular lipid deposition were decreased, p‑PI3K, p‑AKT, GLUT4 and DDIT4 protein expression levels were increased, p‑IRS‑1 protein expression levels were decreased, and mTOR and p70S6K mRNA and protein expression levels were decreased in the PA + RSV group. Compared with in the PA + RSV group, DDIT4 protein and mRNA expression levels were reduced in the PA + RSV + DDIT4‑siRNA group, but showed no change in the PA + RSV + MHY1485 group. Following transfection with DDIT4‑siRNA or treatment with MHY1485, the effects of RSV on improving IR and lipid metabolism were weakened, mTOR and p70S6K protein expression levels were upregulated, p‑PI3K, p‑AKT and GLUT4 protein expression levels were down‑regulated, p‑IRS‑1 protein expression levels were upregulated, and culture medium glucose content and cellular lipid deposition were increased. In conclusion, RSV may improve PA‑induced IR in C2C12 cells through the DDIT4/mTOR/IRS‑1/PI3K/AKT/GLUT4 signaling pathway, as well as via improvements in glucose and lipid metabolism.

The Additive Antinociceptive Effect of Resveratrol and Ketorolac in the Formalin Test in Mice.

Pain represents one of the leading causes of suffering and disability worldwide. Currently available drugs cannot treat all types of pain and may have adverse effects. Hence, the use of pharmacological combinations is an alternative treatment strategy. Therefore, this study aimed to evaluate the combination of resveratrol and ketorolac through isobolographic analysis. CD1 mice were used to study the antinociceptive effect of this combination using the formalin test and the study was divided into two phases. In the first phase, four individual doses of each drug were evaluated, totaling eight testing groups. From these data, the median effective doses (ED50) of each drug were calculated. In the second phase, four testing groups were used to evaluate the combination of sub-doses of both drugs and obtain the experimental ED50. To evaluate gastric damage, five groups were employed, including indomethacin, vehicle, resveratrol, ketorolac, and combined resveratrol and ketorolac groups. Stomach samples from the mice were taken after 5 h of treatment, and the area of the ulcers was determined. Resveratrol plus ketorolac elicited a reduction in nociceptive behavior during both phases of the formalin test, and isobologram analysis revealed that the theoretical and experimental ED50 values of resveratrol and ketorolac did not differ significantly, implying an additive interaction between the drugs. Additionally, the drug combination did not generate gastric ulcers, thus enhancing the desired effects without increasing the adverse effects. Consequently, these findings substantiate the efficacy of the resveratrol and ketorolac combination in the formalin test, thereby highlighting its potential as a viable alternative for alleviating pain.

Comparative efficacy of five most common traditional Chinese medicine monomers for promoting recovery of motor function in rats with blunt spinal cord injury: a network meta-analysis.

This research employed a network meta-analysis (NMA) to examine the effectiveness of five traditional Chinese medicine (TCM) monomers for promoting motor function recovery in rats with blunt spinal cord injury (SCI). Wangfang, China National Knowledge Infrastructure, Web of Science, Embase, Chinese Scientific Journal Database, PubMed, and the Chinese Biomedical Literature Databases were searched for retrieving relevant articles published from their inception to December 2022. Two reviewers performed screening of search results, data extraction, and literature quality assessment independently. For this meta-analysis, 59 publications were included. Based on the recovery of motor function at weeks 1, 2, 3, and 4 in NMA, almost all TCM groups had significantly increased positive effects than the negative control animals. In terms of cumulative probability, the tanshinone IIA (TIIA) group ranked first in restoring motor function in the first week after blunt SCI, and the resveratrol (RSV) group ranked first during the last 3 weeks. The NMA revealed that TCM monomers could effectively restore motor function in the rat model of blunt SCI. In rats with blunt SCI, TIIA may be the most effective TCM monomer during the first week, whereas RSV may be the most effective TCM monomer during the last 3 weeks in promoting motor function recovery. For better evidence reliability in preclinical investigations and safer extrapolation of those findings into clinical settings, further research standardizing the implementation and reporting of animal experiments is required. https://inplasy.com/, identifier INPLASY202310070.

Protective effect of ursodeoxycholic acid and resveratrol against tacrolimus induced hepatotoxicity

ABSTRACT Tacrolimus (TAC) is a potent and well-tolerated immunosuppressive drug, but serious side effects including nephrotoxicity and hepatotoxicity have been reported. Ursodeoxycholic acid (UDCA) and resveratrol (RSV) exhibit hepatoprotective effects in liver diseases. We investigated the hepatoprotective effect of UDCA and RSV against TAC induced hepatotoxicity. We divided 40 male rats into five equal groups: A) control group, B) TAC group, C) TAC + UDCA group, D) TAC + RSV group, E) TAC + UDCA + RSV group. We administered 0.5 mg/kg TAC once daily, 25 mg/kg UDCA twice daily and 10 mg/kg RSV once daily. The drugs in the experimental groups were given by gavage from the first day of the study and continued for 21 days. Histopathologic and biochemical analyses were performed on day 22. In group B, serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), tumor necrosis factor-alpha (TNF), interleukin-1 (IL-1), interleukin-6 (IL-6), total oxidative status (TOS) and malondialdehyde (MDA) levels were higher compared to group A, and catalase (CAT), superoxide dismutase (SOD) levels and total antioxidant status (TAS) were lower compared to group A. Severe cellular swelling, degeneration and focal necrosis were more evident in group B than in groups C–E. Histopathological improvement was observed in groups C–E, where UDCA and RSV were combined, compared to group B. We found that UDCA and RSV, together or separately, protected the liver against oxidative stress damage caused by TAC.

P-191 The impact of resveratrol supplementation as antioxidant on embryonic development in older women (over 40years) undergoing IVF

Abstract Study question Does the resveratrol supplementation in human embryo culture medium improve embryo quality and pregnancy outcomes in older women? Summary answer Resveratrol significantly improved good quality embryo rates. These results are thought to be due to the biological activities of resveratrol as an antioxidant. What is known already Reproductive aging involves age-related declines in ovarian function and development capacity. After initiating meiosis, germ cells arrest at the dictyate stage of prophase I in the ovary for 10-50 years in women. Accumulated reactive oxygen species (ROS) affect oocytes adversely. Antioxidants reduce ROS-induced damage to oocytes and resveratrol is an important antioxidant polyphenolic compound. Resveratrol has positive effects on fertility, it improves the development of blastocysts in aged animal and it could enhance the maturation and quality of oocytes from aged women. However, there are just a few studies there are clarified relationship between resveratrol and embryos in older women. Study design, size, duration The study retrospectively included 966 patients with aged over 40 years to evaluate the impact of resveratrol on embryo quality and IVF pregnancy outcomes between January 2019 and December 2021. Participants/materials, setting, methods The oocytes from aged female (over 40years) were divided into 2 groups, fertilized and cultured in MRC media (MRC#D13 (day 1 ∼ 3) and MRC#D46 (day 4 ∼ 6 culture medium); Maria Medical Foundation, South Korea) in the presence or absence of resveratrol (0.5 μM; Sigma-Aldrich, USA). Fertilization, good quality embryo, clinical pregnancy, and implantation rate after embryo transfer were compared among between the two groups. Data analyzed using the SPSS and T-test p value &amp;lt;0.05 considered statistically significant. Main results and the role of chance There was no significant difference in female age (42.5 ± 2.2 vs. 42.3 ± 2.0, P = 0.358), No. of previous ART cycles (3.6 ± 2.3 vs. 3.7 ± 2.5, P = 0.680), thickness of endometrium (9.2 ± 1.5 vs. 9.4 ± 1.4, P = 0.312), maturation rate per oocytes (74.6% vs. 75.8%, P = 0.290), fertilization rate (81.5% vs. 80.0%, P = 0.165), and No. of transferred embryos (2.4 ± 0.6 vs. 2.4 ± 0.6, P = 0.818). However, good quality embryo rate (44.0% vs. 36.4%, p &amp;lt; 0.05) in the resveratrol group was 7.6% higher than the control group. Pregnancy rate (26.8% vs. 22.7%, P = 0.167) and implantation rate (11.9% vs. 9.9%, P = 0.131) were slightly higher than control group but this was not statistically significant. Limitations, reasons for caution This is a retrospective study that generates strong conclusions, but it could be interesting to test it in a prospective study. The study was conducted at a single IVF center. Embryo transfer result is based on implantation rate, while the live birth data for all pregnancies are not yet available. Wider implications of the findings This is the first study to investigate the effects of resveratrol on the embryonic developmental competence and pregnancy potential of older women (over 40years). Trial registration number not applicable