Dietary Inflammatory Index in relation to Type 2 Diabetes: A Meta-Analysis.

Background and Aims: Epidemiologic studies show a strong association between chronic inflammation and type 2 diabetes (T2D). Diet may also affect the risk of T2D by modulating inflammation. This meta-analysis aimed to assess the relation of dietary inflammatory index (DII) and risk of T2D. Methods: PubMed and Scopus were systematically searched from their inception to September 2020 to identify relevant studies. Relative risks, hazard ratios, or odds ratios (OR), with their corresponding 95% confidence intervals (95% CI), were calculated and pooled using a random-effects model. Results: A total of 48 different studies, with a total sample size of 1,687,424 participants, were eligible to be included in this meta-analysis. In the overall analysis, no significant association was observed between DII and risk of T2D (OR = 1.03, 95% CI: 0.91 to 1.15), with significant evidence for heterogeneity (I 2 = 96.5%, P < 0.001); however, higher DII was identified as being significantly related to increased risk of T2D in high quality studies (OR = 1.58, 95% CI: 1.15 to 2.17). In the stratified analysis by the dietary assessment tool, background disease, and sex of participants, DII showed no significant association with T2D. Conclusions: Higher DII might be associated with an increased risk of T2D. Additional well-designed studies are required to confirm this finding.

Association between calcium intake and risk of breast cancer: An updated systematic review and dose-response meta-analysis of cohort studies.

BACKGROUND: Prospective cohort studies that dietary or total calcium intake was considered as the exposure variable and risk of BC as the main or second outcome were included in this systematic review. METHODS: We searched the online databases of PubMed, Web of science, Scopus and, Google scholar for relevant studies published up to November 2021, using relevant keywords. Seven cohort studies including 1,579,904 participants, were eligible for the current meta-analysis. RESULTS: Pooled effect size for the highest versus lowest category indicated that increasing dietary calcium intake was significantly associated with a reduced risk of BC (RR, 0.90; 95% CI: 0.81-1.00). However, total calcium intake revealed a non-significant inverse association (RR, 0.97; 95%CI, 0.91-1.03). Dose-response meta-analysis showed that every additional 350 mg per day dietary (RR, 0.94; 95% CI, 0.89-0.99) and total calcium intake (RR, 0.99; 95% CI, 0.97-1.00) was significantly associated with a lower risk of BC. Also, a significant decreasing trend for the risk of BC was observed after 500 mg/d of dietary calcium intake (P-nonlinearity = 0.05, n = 6. CONCLUSION: Finally, our dose-response meta-analysis revealed a 6 and 1% lower risk of BC in each 350 mg per day increment in dietary and total calcium intake, respectively.

The effects of intermittent fasting diet in comparison with low-calorie diet on lipid profile, glycemic status, and liver fibrosis in patients with non-alcoholic fatty liver (NAFLD): a study protocol for a randomized controlled clinical trial.

INTRODUCTION: Non-alcoholic fatty liver disease (NAFLD) is a common liver disease characterized by an increase in fat in liver cells. The outbreak of NAFLD is estimated to be 32.4% worldwide, with higher rates in Asia and Iran. Nutritional factors such as excessive calorie intake, high fructose intake, copper deficiency, and increased iron intake play an important role in NAFLD. Since there is no specific treatment for NAFLD, intermittent fasting (IF) diet has been suggested as an alternative treatment for obesity and related complications. Previous studies showed the potential positive effects of IF on metabolic health and the reduction of oxidative stress in NAFLD. This randomized controlled trial (RCT) will be aimed to examine the effect of the IF diet in comparison with a low-calorie diet (LCD) on lipid profile, glycemic status, and liver fibrosis in patients with NAFLD. METHODS AND ANALYSIS: This is a parallel randomized clinical trial conducted on 52 overweight and obese patients with NAFLD. Participants will be randomly assigned to receive either 16:8 IF (fasting from 8 P.M. to 12 P.M. the next day) or a low-calorie (55% carbohydrate- 30% fat, 15% protein) diet for 12 weeks. Anthropometric measurements, liver assessments, and metabolic evaluations will be assessed before and after the intervention. Primary outcomes include liver steatosis and fibrosis, while secondary outcomes include liver function enzymes, insulin resistance, lipid profile, and anthropometric measurements. DISCUSSION: Since obesity and insulin resistance are the most important risk factors of NAFLD, and there is no treatment for it, it seems that lifestyle changes such as low caloric diet like IF and exercise can improve lipid metabolism and liver enzymes. TRIAL REGISTRATION: Iranian registry of clinical trials (IRCT20170202032367N5).

Adipocytokines in obstructive sleep apnea: A systematic review and meta-analysis.

BACKGROUND AND AIM: Adipocytokines play an important role in obstructive sleep apnea (OSA) by mediating inflammatory responses. Previous studies have reported that OSA is related to a change in the serum levels of adipocytokines; however, the results are still controversial. This meta-analysis aimed to assess the relationship between OSA and circulating level of adipocytokines in adults and children. METHODS: A comprehensive search was conducted in databases of Medline/PubMed and Scopus for pertinent articles published since their inception to July 2022. Weighted mean differences (WMDs) and 95% confidence intervals (CIs) were used to assess the strength of the relationship between the concentrations of adipocytokines with OSA. RESULTS: In the overall analysis, contrary to IL-10, which showed a significant reduction, IL-1ß, IL-4, IL-8, IL-17, and IFN- gamma showed higher levels in OSA patients in comparison with control groups (p <0.05). For adults, IL-1ß, IL-8, IL-17, IL-18, vaspin, visfatin, and chemerin were linked to a greater serum levels in patients with OSA, while, IL-5 and IL-10 were detected significantly lower in adults with OSA in comparison with healthy adults (p <0.05). In children with OSA, the serum levels of IL-4, IL-8, IL-12, IL-17, IL-23, and IFN-gamma were significantly higher than healthy children (p <0.05). CONCLUSION: The levels of inflammatory markers were found to be higher in OSA patients compared with control individuals, suggesting that adipocytokines may contribute to the pathology of OSA.