1.
Trafficking of nonesterified fatty acids in insulin resistance and relationship to dysglycemia.
Walker, RE, Ford, JL, Boston, RC, Savinova, OV, Harris, WS, Green, MH, Shearer, GC
American journal of physiology. Endocrinology and metabolism. 2020;(3):E392-E404
Abstract
In adipose, insulin functions to suppress intracellular lipolysis and secretion of nonesterified fatty acid (NEFA) into plasma. We applied glucose and NEFA minimal models (MM) following a frequently sampled intravenous glucose tolerance test (FSIVGTT) to assess glucose-specific and NEFA-specific insulin resistance. We used total NEFA and individual fatty acids in the NEFA MM, comparing the model parameters in metabolic syndrome (MetSyn) subjects (n = 52) with optimally healthy controls (OptHC; n = 14). Results are reported as mean difference (95% confidence interval). Using the glucose MM, MetSyn subjects had lower [-73% (-82, -57)] sensitivity to insulin (Si) and higher [138% (44, 293)] acute insulin response to glucose (AIRg). Using the NEFA MM, MetSyn subjects had lower [-24% (-35, -13)] percent suppression, higher [32% (15, 52)] threshold glucose (gs), and a higher [81% (12, 192)] affinity constant altering NEFA secretion (ϕ). Comparing fatty acids, percent suppression was lower in myristic acid (MA) than in all other fatty acids, and the stearic acid (SA) response was so unique that it did not fit the NEFA MM. MA and SA percent of total were increased at 50 min after glucose injection, whereas oleic acid (OA) and palmitic acid (PA) were decreased (P < 0.05). We conclude that the NEFA MM, as well as the response of individual NEFA fatty acids after a FSIVGTT, differ between OptHC and MetSyn subjects and that the NEFA MM parameters differ between individual fatty acids.
2.
Effects of saffron supplementation on glycemia and inflammation in patients with type 2 diabetes mellitus: A randomized double-blind, placebo-controlled clinical trial study.
Mobasseri, M, Ostadrahimi, A, Tajaddini, A, Asghari, S, Barati, M, Akbarzadeh, M, Nikpayam, O, Houshyar, J, Roshanravan, N, Alamdari, NM
Diabetes & metabolic syndrome. 2020;(4):527-534
Abstract
BACKGROUND New evidence indicates that overproduction of pro-inflammatory cytokines is responsible for the development of diabetes difficulties. Some herbals such as saffron, may control inflammation and improve the hyperglycemic states in diabetic patients. Therefore, this investigation aimed to assess the effects of saffron supplementation on fasting glucose and inflammatory markers levels in patients with type2 diabetes mellitus (T2DM). METHODS In this randomized double-blind, placebo-controlled clinical trial, 60 T2DM patients were randomly assigned into two groups as saffron and placebo (n = 30) receiving 100 mg/day saffron powder or starch capsules (1 capsule) for a duration of 8 weeks. Fasting blood sample was collected at baseline and at the end of the intervention. Fasting blood glucose (FBG) was immediately analyzed by the auto-analyzer. The serum level of Interleukin -6 (IL-6), Tumor necrosis factor-alpha (TNF-α), and Interleukin-10 (IL-10) were measured using ELISA assay by laboratory kits. Also, Real-time quantitative reverse transcription (RT-PCR) assay measured the expression level of TNF-α, IL-6, and IL-10 at the mRNA level. RESULTS Saffron supplementation significantly decreased the FBG levels within 8 weeks compared to placebo (130.93 ± 21.21 vs 135.13 ± 23.03 mg/dl, P = 0.012). Moreover, the serum level of TNF-α notably reduced in the saffron group compared to the placebo group (114.40 ± 24.28 vs 140.90 ± 25.49 pg/ml, P < 0.001). Also, saffron supplementation significantly down-regulated the expressions of TNF-α (P = 0.035) and IL-6 mRNA levels (P = 0.014). CONCLUSION In our study, it was indicated that saffron modulates glucose levels as well as inflammation status in T2DM patients through decreasing the expressions levels of some inflammatory mediators. Also, further investigations are necessary to confirm the positive effects of saffron as a complementary therapy for T2DM patients.
3.
The effect of probiotic supplementation on glycemic control and lipid profile in patients with type 2 diabetes: A randomized placebo controlled trial.
Razmpoosh, E, Javadi, A, Ejtahed, HS, Mirmiran, P, Javadi, M, Yousefinejad, A
Diabetes & metabolic syndrome. 2019;(1):175-182
Abstract
AIMS: The role of gut microbiota in the pathogenesis of diabetes is increasing; this study investigates the effect of multi-strain probiotics on fasting plasma glucose (FPG), plasma insulin and lipid profile among patients. METHODS This randomized double blind controlled trial was performed among 60 patients; individuals were randomly assigned into 2 groups of 30 participants in order to take either probiotic supplements or placebo for 6 weeks. The probiotic supplement consisted of 7 viable strains Lactobacillus, Bifidobacterium and Streptococcus. Nutrient intakes were estimated using a 3-day and 24 hour-dietary recall at the beginning and end of study. Fasting blood samples were taken before and after intervention to measure the levels of FPG, plasma insulin and lipid profiles. RESULTS Within group comparisons showed significant decrease and increase in the levels of FPG (P = 0.001) and HDL-C (P = 0.002) in probiotic group, respectively. No significant alterations were observed for within and between group comparisons in the levels of insulin, triglycerides, total cholesterol, insulin resistance and anthropometric measurements, including weight, waist circumference and body mass index (all P > 0.05). CONCLUSIONS This study showed a significant decrease in FPG level by multi-strain probiotic supplements in within group comparison; though, further studies are needed to confirm results. (IRCT Code: IRCT2013100714925N1).