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Gut Microbes 2021Several studies reported a potential role of methane producing archaea in the pathophysiology of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). We... (Meta-Analysis)
Meta-Analysis
Several studies reported a potential role of methane producing archaea in the pathophysiology of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). We conducted a systematic review and meta-analysis to assess the prevalence of methane positive small intestinal bacterial overgrowth (SIBO) in IBS and IBD compared with controls. MEDLINE (PubMed) and Embase electronic databases were searched from inception until March 2021 for case-control and prevalence studies reporting SIBO in IBS and IBD. We extracted data from published studies and calculated pooled prevalence of SIBO in IBS or IBD, odds ratios (OR), and 95% CIs, utilizing a random effects model. The final dataset included 17 independent studies assessing the prevalence of methane positive SIBO in 1,653 IBS-patients and 713 controls, and 7 studies assessing the prevalence of methane positive SIBO in 626 IBD-patients and 497 controls, all utilizing breath test for SIBO diagnosis. Prevalence of methane positive SIBO in IBS and IBD was 25.0% (95% CI 18.8-32.4) and 5.6% (95% CI 2.6-11.8), respectively. Methane positive SIBO in IBS was not increased compared to controls (OR = 1.2, 95% CI 0.8-1.7, = .37) but was significantly more prevalent in IBS-C as compared to IBS-D (OR = 3.1, 95% CI 1.7-5.6, = .0001). The prevalence of methane-positive SIBO in patients with IBD was 3-fold lower at 7.4% (95% CI 5.4-9.8) compared to 23.5% (95% CI 19.8-27.5) in controls. The prevalence of methane positive SIBO was significantly lower in Crohn's disease as compared to ulcerative colitis, (5.3%, 95% CI 3.0-8.5 vs. 20.2%, 95% CI 12.8-29.4). This systematic review and meta-analysis suggests methane positivity on breath testing is positively associated with IBS-C and inversely with IBD. However, the quality of evidence is low largely due to clinical heterogeneity of the studies. Thus, causality is uncertain and further studies are required.
Topics: Bacteria; Breath Tests; Case-Control Studies; Female; Humans; Inflammatory Bowel Diseases; Intestine, Small; Irritable Bowel Syndrome; Male; Methane
PubMed: 34190027
DOI: 10.1080/19490976.2021.1933313 -
Asian Pacific Journal of Cancer... Jun 2021Oral Mucositis(OM) is an acute debilitating dose limiting toxicity of Radiotherapy/Radiochemotherapy(RT/RCT) in management of Head and Neck Cancer (HNC).... (Meta-Analysis)
Meta-Analysis
A Systematic Review and Meta-Analysis on the Efficacy of Curcumin/Turmeric for the Prevention and Amelioration of Radiotherapy/Radiochemotherapy Induced Oral Mucositis in Head and Neck Cancer Patients.
BACKGROUND
Oral Mucositis(OM) is an acute debilitating dose limiting toxicity of Radiotherapy/Radiochemotherapy(RT/RCT) in management of Head and Neck Cancer (HNC). Curcumin/Turmeric may reduce OM in patients.
AIM
Efficacy of Curcumin/Turmeric for preventing and ameliorating the onset and severity of RT/RCT induced OM was analysed in this review.
METHODS
A systematic literature search with meta-analysis were performed using Mesh terms in PubMed, Google scholar, Science Direct, Cochrane library and manual searching, articles published from 2010 to April 2021 were included. Clinical trials that studied the efficacy/effects of turmeric / curcumin in management of RT/RCT induced OM in HNC patients were included. Statistical Analysis were done to calculate the pooled Risk ratio at 95%confidence interval with significance at p.
Topics: Anti-Inflammatory Agents, Non-Steroidal; Chemoradiotherapy; Curcumin; Head and Neck Neoplasms; Humans; Stomatitis
PubMed: 34181321
DOI: 10.31557/APJCP.2021.22.6.1671 -
Journal of Cancer Research and... 2021Turmeric exhibits a big promise as a therapeutic agent in the management of oral submucous fibrosis (OSMF). The primary aim of our study is to synthesize the evidence of... (Meta-Analysis)
Meta-Analysis
Turmeric exhibits a big promise as a therapeutic agent in the management of oral submucous fibrosis (OSMF). The primary aim of our study is to synthesize the evidence of the use of turmeric/curcumin in the management of OSMF. The secondary goal of this study is to assess the limitations of previous studies to identify gaps in evidence for future research and give an evidence-based recommendation regarding the usage of turmeric/curcumin for OSMF patients and outline the direction of research. A comprehensive search of PubMed, Web of Science, Scopus, Cochrane Library database, Google Scholar, clinical trial registries, and hand searching was conducted from inception until December 2018. This systematic review was conducted according to the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement (guidelines). In this review, 11 articles were selected for qualitative analysis and 3 out of 11 were selected for meta-analysis. Of these 11 studies, involving 428 patients, 7 were randomized control trials (RCTs), 1 was a nonrandomized trial, and 3 were observational studies. Turmeric was found to be effective in reducing signs and symptoms of OSMF in all 11 studies. All the studies included in this review have reported improvement in mouth opening after treatment with turmeric formulations. This could also be concluded from the meta-analysis of three RCTs. Similar improvement in tongue protrusion, burning sensation, and cheek flexibility has been reported. The lack of reliable evidence for the effectiveness of turmeric for the management of OSMF is illustrated by the paucity and poor methodological quality of studies retrieved for this review. We recommend that RCTs are needed using larger sample size with longer duration follow-up with special attention to the recurrence of signs and symptoms.
Topics: Curcumin; Data Accuracy; Humans; Observational Studies as Topic; Oral Submucous Fibrosis; Randomized Controlled Trials as Topic; Treatment Outcome
PubMed: 34121673
DOI: 10.4103/jcrt.JCRT_95_20 -
Frontiers in Endocrinology 2021Diabetes mellitus (DM) is an ensemble of metabolic conditions that have reached pandemic proportions worldwide. Pathology's multifactorial nature makes patient...
Diabetes mellitus (DM) is an ensemble of metabolic conditions that have reached pandemic proportions worldwide. Pathology's multifactorial nature makes patient management, including lifelong drug therapy and lifestyle modification, extremely challenging. Currently, there is growing evidence about the effectiveness of using herbal supplements in preventing and controlling DM. Curcumin is a bioactive component found , which exhibits several physiological and pharmacological properties such as antioxidant, anti-inflammatory, anticancer, neuroprotective, and anti-diabetic activities. For these reasons, our objective is to systematically review the effects of or curcumin on DM. Databases such as PUBMED and EMBASE were searched, and the final selection included sixteen studies that fulfilled the inclusion criteria. The results showed that curcumin's anti-diabetic activity might be due to its capacity to suppress oxidative stress and inflammatory process. Also, it significantly reduces fasting blood glucose, glycated hemoglobin, and body mass index. Nanocurcumin is also associated with a significant reduction in triglycerides, VLDL-c, total cholesterol, LDL-c, HDL-c, serum C reactive protein, and plasma malonaldehyde. Therefore, it can be considered in the therapeutic approach of patients with DM.
Topics: Animals; Anti-Inflammatory Agents, Non-Steroidal; Curcumin; Diabetes Mellitus; Humans
PubMed: 34012421
DOI: 10.3389/fendo.2021.669448 -
Medicine Mar 2021Nonalcoholic fatty liver disease (NAFLD) is a highly prevalent chronic liver disease characterized by excess accumulation of fat in hepatocytes. Because no drug has been... (Meta-Analysis)
Meta-Analysis
The efficacy of novel metabolic targeted agents and natural plant drugs for nonalcoholic fatty liver disease treatment: A PRISMA-compliant network meta-analysis of randomized controlled trials.
BACKGROUND
Nonalcoholic fatty liver disease (NAFLD) is a highly prevalent chronic liver disease characterized by excess accumulation of fat in hepatocytes. Because no drug has been approved for NAFLD treatment, this work analyzed the effects of agents resulting from 2 research hotspots, metabolic target agents, and natural plant drugs, on NAFLD with network meta-analysis.
METHODS
Public databases were searched through August 14, 2020. Randomized controlled trials that compared obeticholic acid, elafibranor, cenicriviroc, selonsertib, curcumin, silymarin, and resveratrol to placebo were included. Liver pathology improvement, hepatic biochemical indicators, and lipid metabolism indicators were analyzed.
RESULTS
Thirty-five studies were included in the meta-analysis. Obeticholic acid was found to significantly increase the frequency of liver biopsy improvement compared to placebo (OR: 2.10; 95% CI: 1.60, 2.77). The ranking results among the hepatic biochemical indicators showed that obeticholic acid (94.9%) and elafibranor (86.3%) have a relative advantage in reducing alanine aminotransferase (ALT) levels, and obeticholic acid also had an advantage (95.4%) in reducing aspartate aminotransferase (AST) levels. Considering lipid metabolic indicators, elafibranor (expSMD: 0.01; 95% CI: 0.00, 0.05; SUCRA: 100%), and obeticholic acid (expSMD: 0.48; 95% CI: 0.28,0.84; SUCRA: 75.6%) significantly reduced triglyceride (TG) levels compared with placebo; moreover, obeticholic acid, but not elafibranor, caused a serious increase in total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) levels and a decrease in high-density lipoprotein cholesterol (HDL-C) levels.
CONCLUSIONS
Novel metabolic targeted agents generally have better effects than natural plant drugs, especially obeticholic acid, and elafibranor. However, obeticholic acid showed serious adverse effects such as increasing LDL-C levels and decreasing HDL-C levels. Curcumin showed potential advantages for NAFLD but lacked statistical significance.
Topics: Alanine Transaminase; Aspartate Aminotransferases; Chalcones; Chenodeoxycholic Acid; Cholesterol, HDL; Cholesterol, LDL; Curcumin; Enzyme Inhibitors; Humans; Network Meta-Analysis; Non-alcoholic Fatty Liver Disease; Plant Preparations; Propionates; Triglycerides
PubMed: 33761646
DOI: 10.1097/MD.0000000000024884 -
Nutrients Feb 2021The therapeutic effects of curcumin for polycystic ovary syndrome (PCOS) remain inconclusive. The present study aims to evaluate the effects of curcumin on glycemic... (Meta-Analysis)
Meta-Analysis
The therapeutic effects of curcumin for polycystic ovary syndrome (PCOS) remain inconclusive. The present study aims to evaluate the effects of curcumin on glycemic control and lipid profile in patients with PCOS. PubMed, Embase, Scopus, Web of Science, and Cochrane Library were searched from the inception through 28 November 2020. Randomized control trials (RCTs), which enrolled adult patients with PCOS, compared curcumin with placebo regarding the glycemic control and lipid profile, and reported sufficient information for performing meta-analysis, were included. Three RCTs were included. Curcumin significantly improves fasting glucose (mean difference (MD): -2.77, 95% confidence interval (CI): -4.16 to -1.38), fasting insulin (MD: -1.33, 95% CI: -2.18 to -0.49), Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) (MD: -0.32, 95% CI: -0.52 to -0.12), and quantitative insulin sensitivity check index (QUICKI) (MD: 0.010, 95% CI: 0.003-0.018). It also significantly improves high-density lipoprotein (MD: 1.92, 95% CI: 0.33-3.51) and total cholesterol (MD: -12.45, 95% CI: -22.05 to -2.85). In contrast, there is no statistically significant difference in the improvement in low-density lipoprotein (MD: -6.02, 95% CI: -26.66 to 14.62) and triglyceride (MD: 8.22, 95% CI: -26.10 to 42.53) between curcumin and placebo. The results of the fasting glucose, fasting insulin, HOMA-IR, QUICKI, and total cholesterol are conclusive as indicated by the trial sequential analysis. Curcumin may improve glycemic control and lipid metabolism in patients with PCOS and metabolic abnormality without significant adverse effects. Further studies are advocated to investigate the potential effects of curcumin on hyperandrogenism.
Topics: Adult; Blood Glucose; Cholesterol; Curcumin; Dietary Supplements; Fasting; Female; Glycemic Control; Humans; Insulin; Insulin Resistance; Lipid Metabolism; Lipids; Lipoproteins, HDL; Lipoproteins, LDL; Polycystic Ovary Syndrome; Randomized Controlled Trials as Topic; Triglycerides
PubMed: 33669954
DOI: 10.3390/nu13020684 -
Biomedicine & Pharmacotherapy =... May 2021All the plants and their secondary metabolites used in the present study were obtained from Ayurveda, with historical roots in the Indian subcontinent. The selected... (Meta-Analysis)
Meta-Analysis
Repurposing potential of Ayurvedic medicinal plants derived active principles against SARS-CoV-2 associated target proteins revealed by molecular docking, molecular dynamics and MM-PBSA studies.
All the plants and their secondary metabolites used in the present study were obtained from Ayurveda, with historical roots in the Indian subcontinent. The selected secondary metabolites have been experimentally validated and reported as potent antiviral agents against genetically-close human viruses. The plants have also been used as a folk medicine to treat cold, cough, asthma, bronchitis, and severe acute respiratory syndrome in India and across the globe since time immemorial. The present study aimed to assess the repurposing possibility of potent antiviral compounds with SARS-CoV-2 target proteins and also with host-specific receptor and activator protease that facilitates the viral entry into the host body. Molecular docking (MDc) was performed to study molecular affinities of antiviral compounds with aforesaid target proteins. The top-scoring conformations identified through docking analysis were further validated by 100 ns molecular dynamic (MD) simulation run. The stability of the conformation was studied in detail by investigating the binding free energy using MM-PBSA method. Finally, the binding affinities of all the compounds were also compared with a reference ligand, remdesivir, against the target protein RdRp. Additionally, pharmacophore features, 3D structure alignment of potent compounds and Bayesian machine learning model were also used to support the MDc and MD simulation. Overall, the study emphasized that curcumin possesses a strong binding ability with host-specific receptors, furin and ACE2. In contrast, gingerol has shown strong interactions with spike protein, and RdRp and quercetin with main protease (M) of SARS-CoV-2. In fact, all these target proteins play an essential role in mediating viral replication, and therefore, compounds targeting aforesaid target proteins are expected to block the viral replication and transcription. Overall, gingerol, curcumin and quercetin own multitarget binding ability that can be used alone or in combination to enhance therapeutic efficacy against COVID-19. The obtained results encourage further in vitro and in vivo investigations and also support the traditional use of antiviral plants preventively.
Topics: Antiviral Agents; Catechols; Curcumin; Drug Repositioning; Fatty Alcohols; Humans; Medicine, Ayurvedic; Molecular Docking Simulation; Quercetin; SARS-CoV-2; Viral Proteins; COVID-19 Drug Treatment
PubMed: 33561649
DOI: 10.1016/j.biopha.2021.111356 -
Molecular Biology Reports Feb 2021We conducted a systematic review of human trials examining the effects of dietary phytochemicals on Nrf2 activation. In accordance with the PRISMA guidelines, Medline,...
We conducted a systematic review of human trials examining the effects of dietary phytochemicals on Nrf2 activation. In accordance with the PRISMA guidelines, Medline, Embase and CAB abstracts were searched for articles from inception until March 2020. Studies in adult humans that measured Nrf2 activation (gene or protein expression changes) following ingestion of a phytochemical, either alone or in combination were included. The study was pre-registered on the Prospero database (Registration Number: CRD42020176121). Twenty-nine full-texts were retrieved and reviewed for analysis; of these, eighteen were included in the systematic review. Most of the included participants were healthy, obese or type 2 diabetics. Study quality was assessed using the Cochrane Collaboration Risk of Bias Assessment tool. Twelve different compounds were examined in the included studies: curcumin, resveratrol and sulforaphane were the most common (n = 3 each). Approximately half of the studies reported increases in Nrf2 activation (n = 10); however, many were of poor quality and had an unclear or high risk of bias. There is currently limited evidence that phytochemicals activate Nrf2 in humans. Well controlled human intervention trials are needed to corroborate the findings from in vitro and animal studies.
Topics: Adult; Aged; Antioxidants; Bias; Curcumin; Diabetes Mellitus, Type 2; Humans; Isothiocyanates; Middle Aged; NF-E2-Related Factor 2; Obesity; Oxidative Stress; Phytochemicals; Polyphenols; Resveratrol; Sulfoxides
PubMed: 33515348
DOI: 10.1007/s11033-020-06041-x -
Nutrients Jan 2021Diabetes mellitus is an important issue for public health, and it is growing in the world. In recent years, there has been a growing research interest on efficacy... (Meta-Analysis)
Meta-Analysis
Diabetes mellitus is an important issue for public health, and it is growing in the world. In recent years, there has been a growing research interest on efficacy evidence of the curcumin use in the regulation of glycemia and lipidaemia. The molecular structure of curcumins allows to intercept reactive oxygen species (ROI) that are particularly harmful in chronic inflammation and tumorigenesis models. The aim of our study performed a systematic review and meta-analysis to evaluate the effect of curcumin on glycemic and lipid profile in subjects with uncomplicated type 2 diabetes. The papers included in the meta-analysis were sought in the MEDLINE, EMBASE, Scopus, Clinicaltrials.gov, Web of Science, and Cochrane Library databases as of October 2020. The sizes were pooled across studies in order to obtain an overall effect size. A random effects model was used to account for different sources of variation among studies. Cohen's , with 95% confidence interval (CI) was used as a measure of the effect size. Heterogeneity was assessed while using Q statistics. The ANOVA-Q test was used to value the differences among groups. Publication bias was analyzed and represented by a funnel plot. Curcumin treatment does not show a statistically significant reduction between treated and untreated patients. On the other hand, glycosylated hemoglobin, homeostasis model assessment (HOMA), and low-density lipoprotein (LDL) showed a statistically significant reduction in subjects that were treated with curcumin, respectively ( = 0.008, < 0.001, = 0.021). When considering HBA1c, the meta-regressions only showed statistical significance for gender ( = 0.034). Our meta-analysis seems to confirm the benefits on glucose metabolism, with results that appear to be more solid than those of lipid metabolism. However, further studies are needed in order to test the efficacy and safety of curcumin in uncomplicated type 2 diabetes.
Topics: Blood Glucose; Cholesterol, HDL; Cholesterol, LDL; Curcumin; Diabetes Mellitus, Type 2; Glycated Hemoglobin; Humans; Randomized Controlled Trials as Topic; Triglycerides
PubMed: 33514002
DOI: 10.3390/nu13020404 -
Environmental Pollution (Barking, Essex... Feb 2021Rice paddies are one of the largest greenhouse gases (GHGs) facilitators that are predominantly regulated by nitrogen (N) fertilization. Optimization of N uses based on...
Rice paddies are one of the largest greenhouse gases (GHGs) facilitators that are predominantly regulated by nitrogen (N) fertilization. Optimization of N uses based on the yield has been tried a long since, however, the improvement of the state-of-the-art technologies and the stiffness of global warming need to readjust N rate. Albeit, few individual studies started to, herein attempted as a systematic review to generalize the optimal N rate that minimizes global warming potential (GWP) concurrently provides sufficient yield in the rice system. To satisfy mounted food demand with inadequate land & less environmental impact, GHGs emissions are increasingly evaluated as yield-scaled basis. This systematic review (20 published studies consisting of 21 study sites and 190 observations) aimed to test the hypothesis that the lowest yield-scaled GWP would provide the minimum GWP of CH and NO emissions from rice system at near optimal yields. Results revealed that there was a strong polynomial quadratic relationship between CH emissions and N rate and strong positive correlation between NO emissions and N rate. Compared to control the low N dose emitted less (23%) CH whereas high N dose emitted higher (63%) CH emission. The highest NO emission observed at moderated N level. In total GWP, about 96% and 4%, GHG was emitted as CH and NO, respectively. The mean GWP of CH and NO emissions from rice was 5758 kg CO eq ha. The least yield-scaled GWP (0.7565 (kg CO eq. ha)) was recorded at 190 kg N ha that provided the near utmost yield. This dose could be a suitable dose in midseason drainage managed rice systems especially in tropical and subtropical climatic conditions. This yield-scaled GWP supports the concept of win-win for food security and environmental aspects through balancing between viable rice productivity and maintaining convincing greenhouse gases.
Topics: Agriculture; Global Warming; Methane; Nitrogen; Nitrous Oxide; Oryza; Soil
PubMed: 33388675
DOI: 10.1016/j.envpol.2020.116386