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Santos RKF, Costa SSLD, Santos SHD, Rocha VDS, Silva AMDOE, Pires LV. Association between circulating micronutrient pattern, glycemic control, and insulin resistance in type 2 diabetes mellitus. Biometals 2024; 37:527-537. [PMID: 38197982 DOI: 10.1007/s10534-023-00568-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/29/2023] [Indexed: 01/11/2024]
Abstract
The circulating micronutrient pattern in type 2 diabetes mellitus (T2DM) may impact glycemic control and insulin resistance; however, there is a scarcity of studies that have evaluated the circulating micronutrient pattern in the T2DM population. Therefore, our objective was to identify circulating micronutrient pattern and their association with markers of glycemic control and insulin resistance in individuals with T2DM. We developed a cross-sectional observational study involving adults with T2DM in Sergipe, Brazil. We assessed plasma levels of magnesium, zinc, calcium, potassium, and serum 25-hydroxyvitamin D. Additionally, also measured fasting glucose levels, the percentage of glycated hemoglobin (%HbA1c), and calculated the homeostatic model assessment for insulin resistance (HOMA-IR). Patterns of body reserve were established using principal component analysis and categorized into quartiles. Binary logistic regression models were employed. We evaluated 114 individuals (63.7% women), with a median age and body mass index of 49 years and 29.6 kg/m², respectively. Two circulating micronutrient patterns were identified, explaining 62.5% of the variance: Pattern 1 (positive contributions from magnesium, zinc, calcium, and potassium) and Pattern 2 (positive contributions from 25-hydroxyvitamin D and zinc, with a negative contribution from potassium). Lowest quartile for Pattern 1 and Pattern 2 exhibiting a 4.32-fold (p = 0.019) and 3.97-fold (p = 0.038) higher likelihood of increasing HOMA-IR and %HbA1c values, respectively, compared to the larger quartiles. However, no associations were found between these patterns and fasting glucose values. Lowest quartile for both patterns of micronutrients was associated with inadequate metabolic control in individuals with T2DM.
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Affiliation(s)
- Ramara Kadija Fonseca Santos
- Postgraduate Program in Health Sciences, Center for Biological and Health Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
- Nutritional Biochemistry Laboratory, Department of Nutrition, Center for Biological and Health Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | | | - Samir Hipólito Dos Santos
- Postgraduate Program in Chemistry, Institute of Chemistry, Federal University of Bahia, Salvador, Bahia, Brazil
| | | | - Ana Mara de Oliveira E Silva
- Postgraduate Program in Health Sciences, Center for Biological and Health Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
- Postgraduate Program in Nutritional Sciences, Department of Nutrition, Center for Biological and Health Sciences, Federal University of Sergipe, Avenida Marcelo Deda Chagas, S/n - Jardim Rosa Elze, São Cristóvão, Sergipe, 49107-230, Brazil
| | - Liliane Viana Pires
- Nutritional Biochemistry Laboratory, Department of Nutrition, Center for Biological and Health Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil.
- Postgraduate Program in Nutritional Sciences, Department of Nutrition, Center for Biological and Health Sciences, Federal University of Sergipe, Avenida Marcelo Deda Chagas, S/n - Jardim Rosa Elze, São Cristóvão, Sergipe, 49107-230, Brazil.
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Ali Khan I, Alhaizan MA, Neyazi SM, Al-Hakeem MM, Alshammary AF. Relevance of Serum Levels and Functional Genetic Variants in Vitamin D Receptor Gene among Saudi Women with Gestational Diabetes Mellitus. Nutrients 2023; 15:4288. [PMID: 37836571 PMCID: PMC10574375 DOI: 10.3390/nu15194288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/04/2023] [Accepted: 10/06/2023] [Indexed: 10/15/2023] Open
Abstract
Background: This study explored the association between ApaI-TaqI Single Nucleotide Polymorphisms (SNPs) in a Vitamin D receptor (VDR) and the risk of Gestational Diabetes Mellitus (GDM) in Saudi women, along with the serum levels of vitamin D. Methods: Ninety women with GDM and 90 non-GDM women were enrolled, based on the inclusion and exclusion criteria for pregnant women enrolled in a single-center study. Blood samples were retrieved from 180 pregnant women using ethylenediaminetetraacetic acid (EDTA) tubes. Serum samples were used to measure the vitamin D, 25-hydroxyvitamin D (25(OH)D or calcidiol), and lipid profiles. Blood was used to measure the hemoglobin A1c levels and to isolate the DNA. The polymerase chain reaction (PCR) was performed for the ApaI (rs79785232), BsmI (rs1544410), FokI (rs2228570), and TaqI (rs731236) SNPs in the VDR gene using restriction fragment length polymorphism analysis. Validation was performed using Sanger sequencing. Statistical analyses were performed between the patients with and without GDM using various statistical software packages. Results: The Hardy-Weinberg equilibrium analysis was statistically significant (p > 0.05). The ApaI, BsmI, and TaqI SNPs were associated with alleles, genotypes, and different genetic models (p < 0.05). Vitamin D levels were associated with deficient levels (p = 0.0002), as well as with a normal and overweight body mass index (p = 0.0004). When vitamin D levels were measured with GDM covariates, the fasting plasma glucose (FPG) (p = 0.0001), postprandial blood glucose (PPBG) (p < 0.0001), oral glucose tolerance test (OGTT)-1 h (p = 0.005), high-density lipoprotein (p = 0.022), and low-density lipoprotein cholesterol (LDLc) (p = 0.001) levels were significantly different. When similar vitamin D levels were measured for each genotype, we confirmed that the ApaI SNP was associated with sufficient levels (p < 0.0001), whereas the BsmI, FokI, and TaqI (p < 0.05) were associated with insufficient levels. The logistic regression model confirmed that the first hour of the OGTT (p = 0.005) was strongly associated with GDM, whereas the analysis of variance confirmed that FPG and PPBG (p < 0.05) were strongly associated with all the SNPs evaluated in the VDR gene. Additionally, the second hour of the OGTT (p = 0.048) and LDLc (p = 0.049) were associated with the ApaI and FokI SNP. Moreover, the first hour OGTT (p = 0.045) and lipid profile parameters (p < 0.05) were associated. Haplotype analysis revealed positive associations among the examined SNPs, which seemed compatible with the hypothesis that variants and combinations of multiple SNP genotypes enhance the risk of GDM in women. Haplotype analysis revealed that different combinations of alleles, such as AGCC, CATT, CGTC, AGTC, and CATT (p < 0.05), were strongly associated. The linkage disequilibrium (LD) analysis showed a strong association with all combinations (p < 0.05). Among the gene-gene interactions, all possible combinations showed a positive association (p < 0.05). Conclusions: Low vitamin D levels were observed in women with GDM. The ApaI, BsmI, and TaqI SNPs were associated with genotype and allele frequencies (p < 0.05). Vitamin D and the SNPs in the VDR gene were associated, according to the ANOVA, logistic regression, haplotype analysis, LD analysis, and the generalized multifactor dimensionality reduction model (p < 0.05).
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Affiliation(s)
- Imran Ali Khan
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia;
| | - Maysoon Abdulhadi Alhaizan
- Department of Obstetrics and Gynecology, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.A.); (S.M.N.); (M.M.A.-H.)
| | - Salwa Mohamed Neyazi
- Department of Obstetrics and Gynecology, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.A.); (S.M.N.); (M.M.A.-H.)
| | - Malak Mohammed Al-Hakeem
- Department of Obstetrics and Gynecology, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.A.); (S.M.N.); (M.M.A.-H.)
| | - Amal F. Alshammary
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia;
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de Oliveira E Silva Ullmann T, Ramalho BJ, Laurindo LF, Tofano RJ, Rubira CJ, Guiguer EL, Barbalho SM, Flato UAP, Sloan KP, Araujo AC. Effects of Vitamin D Supplementation in Diabetic Kidney Disease: An Systematic Review. J Ren Nutr 2023; 33:618-628. [PMID: 37302723 DOI: 10.1053/j.jrn.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 05/05/2023] [Accepted: 05/27/2023] [Indexed: 06/13/2023] Open
Abstract
Diabetes Mellitus is a highly prevalent condition in which Diabetes Mellitus type 2 is the most common. Diabetic Kidney Disease is one of the most relevant complications and affects approximately one-third of patients with Diabetes Mellitus. It is characterized by increased urinary protein excretion and a decrease in glomerular filtration rate, assessed by serum creatinine levels. Recent studies have shown that vitamin D levels are low in these patients. This study aimed to conduct a systematic review of the effects of vitamin D supplementation on proteinuria and creatinine, which are important markers for assessing the severity of kidney disease in patients with Diabetic Kidney Disease. PUBMED, EMBASE, and COCHRANE databases were consulted, Preferred Reporting Items for a Systematic Review and Meta-Analysis guidelines were followed, and the COCHRANE toll for bias assessment was applied. Six papers were quantitative studies and fulfilled the inclusion criteria for this review. The results showed that vitamin D supplementation of 50,000 I.U./week for 8 weeks effectively reduced proteinuria and creatinine in patients with Diabetic Kidney Disease, particularly in patients with Diabetes Mellitus type 2. Vitamin D supplementation is beneficial for patients with Diabetic Kidney Disease by having essential effects on disease-related inflammatory markers, such as the reduction of proteinuria and creatinine. However, more clinical trials must be conducted to evaluate the intervention among more significant numbers of patients.
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Affiliation(s)
- Thais de Oliveira E Silva Ullmann
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marília, São Paulo, Brazil; Department of Biochemistry and Pharmacology, University of Marília, São Paulo, Brazil; Hospital Beneficente Unimar - University of Marília, São Paulo, Brazil
| | | | | | - Ricardo José Tofano
- Department of Biochemistry and Pharmacology, University of Marília, São Paulo, Brazil; Hospital Beneficente Unimar - University of Marília, São Paulo, Brazil
| | - Claudio José Rubira
- Department of Biochemistry and Pharmacology, University of Marília, São Paulo, Brazil; Hospital Beneficente Unimar - University of Marília, São Paulo, Brazil
| | - Elen Landgraf Guiguer
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marília, São Paulo, Brazil; Department of Biochemistry and Pharmacology, University of Marília, São Paulo, Brazil; Department of Biochemistry, School of Food and Technology of Marília, São Paulo, Brazil
| | - Sandra Maria Barbalho
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marília, São Paulo, Brazil; Department of Biochemistry and Pharmacology, University of Marília, São Paulo, Brazil; Department of Biochemistry, School of Food and Technology of Marília, São Paulo, Brazil.
| | - Uri Adrian Prync Flato
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marília, São Paulo, Brazil; Department of Biochemistry and Pharmacology, University of Marília, São Paulo, Brazil; Hospital Beneficente Unimar - University of Marília, São Paulo, Brazil
| | | | - Adriano Cressoni Araujo
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marília, São Paulo, Brazil; Department of Biochemistry and Pharmacology, University of Marília, São Paulo, Brazil
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Liu S, Li J, Zhang M. Determination of immune factor levels in serum and local hematoma samples of osteoporotic fracture patients and clinical study of the effect of active vitamin D3 treatment on immune factor levels. J Orthop Surg Res 2023; 18:291. [PMID: 37038178 PMCID: PMC10088267 DOI: 10.1186/s13018-023-03777-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 04/02/2023] [Indexed: 04/12/2023] Open
Abstract
OBJECTIVE The aim of this study was to investigate changes in systemic and local immune factors, namely, interleukin (IL)-1β, IL-6 and tumor necrosis factor (TNF)-α, in patients with and without osteoporotic fractures and to explore the effects of active vitamin D3 treatment on immune function and fracture prognosis in patients with osteoporotic fractures. METHOD The mRNA expression levels of IL-1β, IL-6 and TNF-α were measured before the operation. After the operation, the patients in the control group were treated with conventional fracture treatment and calcium supplementation, and the patients in the treatment group were treated with calcium plus active vitamin D3 in addition to conventional fracture treatment. The serum of each patient was collected on the seventh day after the operation. RESULTS The expression levels of the three immune factors (IL-1β, IL-6 and TNF-α) in the fracture end hematoma samples were significantly positively correlated with those in the serum samples (P < 0.05). The mean values of the serums of IL-1β, IL-6 and TNF-α in the osteoporosis group were significantly higher than those in the non-osteoporosis group (P < 0.05). The average number of hematomas in the osteoporosis group was significantly higher than that in the non-osteoporosis group (P < 0.05). The results for the active vitamin D3 treatment group were significantly lower than those for the control group (P < 0.05). The mean wrist function score of the active vitamin D3 treatment group was significantly better than that of the control group (P < 0.05). The average fracture healing time of the treatment group was significantly shorter than that of the control group (P < 0.05). CONCLUSION The relative expression of IL-1β, IL-6, and TNF-α in the fracture end hematoma samples was positively correlated with the corresponding levels of these immune factors in the serum samples. The levels of IL-1β, IL-6 and TNF-α in the serum and fracture end hematoma samples of the osteoporotic fracture patients were higher than those of the non-osteoporotic fracture patients. Active vitamin D3 treatment promoted fracture healing by affecting the levels of these immune factors.
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Affiliation(s)
- Sijia Liu
- Shengjing Hospital of China Medical University, Shengjing, China
| | - Jianjun Li
- Shengjing Hospital of China Medical University, Shengjing, China.
| | - Mingwei Zhang
- Shengjing Hospital of China Medical University, Shengjing, China
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Pinzariu AC, Sova IA, Maranduca MA, Filip N, Drochioi IC, Vamesu CG, Clim A, Hurjui LL, Moscalu M, Soroceanu RP, Serban DN, Serban IL. Vitamin D Deficiency in Both Oral and Systemic Manifestations in SARS-CoV-2 Infection: Updated Review. Medicina (B Aires) 2022; 59:medicina59010068. [PMID: 36676692 PMCID: PMC9866644 DOI: 10.3390/medicina59010068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/20/2022] [Accepted: 12/23/2022] [Indexed: 12/29/2022] Open
Abstract
The specialized literature emphasizes the fact that vitamin D has a potentially beneficial effect in the context of the current COVID-19 pandemic. The purpose of this article is to highlight the role of vitamin D, both prophylactic and curative, in the treatment of patients diagnosed with COVID-19. Even though its relevance is still unknown and causes various controversies, there is currently no specific treatment for patients diagnosed with COVID-19. There are various prevention strategies with new vaccination schedules, but additional randomized and clinical trials are still needed to combat this pandemic. In addition to the systemic manifestations of SARS-CoV-2 infection, oral manifestations of this disease have also been described in the literature. The etiology of oral manifestations associated with COVID-19 infection and vitamin D deficiency remains controversial. In the present studies, oral manifestations such as salivary gland infections, aphthae, erythema, gingivitis, ulcers, etc. have been reported. This is a new topic, and the prevalence of manifestations is described in only a few studies, which is inconsistent with the number of COVID-19 cases reported since the beginning of the pandemic. The clinical symptomatology in patients with current COVID-19 infection is polymorphic. Whether the oral manifestation is directly caused by SARS-CoV-2 or a secondary manifestation remains an important topic to analyze and discuss.
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Affiliation(s)
- Alin Constantin Pinzariu
- Department of Morpho-Functional Sciences II, Discipline of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Ivona Andreea Sova
- IOSUD Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Minela Aida Maranduca
- Department of Morpho-Functional Sciences II, Discipline of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
- Internal Medicine Clinic, “St. Spiridon” County Clinical Emergency Hospital, 700115 Iasi, Romania
| | - Nina Filip
- Department of Morpho-Functional Sciences II, Discipline of Biochemistry, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Ilie Cristian Drochioi
- Department of Oral and Maxillofacial Surgery and Reconstructive, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700020 Iasi, Romania
| | - Calin George Vamesu
- Department of Morpho-Functional Sciences II, Discipline of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Andreea Clim
- Department of Morpho-Functional Sciences II, Discipline of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
- Correspondence: (A.C.); (M.M.)
| | - Loredana Liliana Hurjui
- Department of Morpho-Functional Sciences II, Discipline of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Mihaela Moscalu
- Department of Preventive Medicine and Interdisciplinarity, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
- Correspondence: (A.C.); (M.M.)
| | - Radu Petru Soroceanu
- Department of Surgery I, Discipline of Surgical Semiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Dragomir Nicolae Serban
- Department of Morpho-Functional Sciences II, Discipline of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Ionela Lacramioara Serban
- Department of Morpho-Functional Sciences II, Discipline of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
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Li M, Wang F, Wang J, Wang A, Yao X, Strappe P, Zhou Z, Wu Q, Guo T. Starch acylation of different short-chain fatty acids and its corresponding influence on gut microbiome and diabetic indexes. Food Chem 2022; 389:133089. [DOI: 10.1016/j.foodchem.2022.133089] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 03/29/2022] [Accepted: 04/24/2022] [Indexed: 12/21/2022]
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Zhu A, Kuznia S, Niedermaier T, Holleczek B, Schöttker B, Brenner H. Consistent Inverse Associations of Total, “Bioavailable”, Free, and “Non-Bioavailable” Vitamin D with Incidence of Diabetes among Older Adults with Lower Baseline HbA1c (≤6%) Levels. Nutrients 2022; 14:nu14163282. [PMID: 36014788 PMCID: PMC9413175 DOI: 10.3390/nu14163282] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/04/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Serum 25-hydroxyvitamin (25(OH)D) levels are inversely associated with risk of diabetes. The “free hormone hypothesis” suggests potential effects to be mainly related to concentrations of “bioavailable” and free rather than total 25(OH)D. We assessed associations of serum concentrations of vitamin D-binding protein (VDBP), as well as total “bioavailable”, complementary “non-bioavailable”, and free 25(OH)D, with the risk of developing diabetes among non-diabetic older adults in a large population-based cohort study in Germany. Methods: We included 4841 non-diabetic older adults aged 50–75 years at the baseline exam from the ESTHER cohort conducted in Saarland, Germany, in 2001–2002. Concentrations of “bioavailable” and free 25(OH)D were derived from serum concentrations of VDBP, total 25(OH)D, and albumin. Incidence of diabetes was ascertained during up to 14 years of follow-up. Associations were quantified by multivariable Cox proportional hazards regression models with comprehensive confounder adjustment. Results: During a median follow-up of 10.6 years, 837 non-diabetic participants developed diabetes. We observed similar inverse associations with developing diabetes for VDBP (hazard ratio (HR) for lowest versus highest quintile: 1.37, 95% confidence interval (CI): 1.09, 1.72), total 25(OH)D (HR: 1.31, 95% CI: 1.03, 1.66), and “non-bioavailable” 25(OH)D (HR: 1.30, 95% CI: 1.02, 1.65). Associations were smaller and statistically insignificant for “bioavailable” and free 25(OH)D. However, associations of total “non-bioavailable”, “bioavailable”, and free 25(OH)D with incidence of diabetes were much stronger among, and essentially restricted to, participants with lower baseline HbA1c (≤6%) levels. Conclusions: This large prospective cohort study of older Caucasian adults, in agreement with results from randomized trials and Mendelian randomization studies, supports a protective effect of vitamin D against development of diabetes. The “free hormone theory” may not be relevant in this context. However, our results underline the importance of adequate vitamin D status among those who have not yet shown any sign of impaired glucose tolerance.
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Affiliation(s)
- Anna Zhu
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Medical Faculty Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Sabine Kuznia
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Medical Faculty Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Tobias Niedermaier
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | | | - Ben Schöttker
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Network Aging Research, Heidelberg University, 69115 Heidelberg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Network Aging Research, Heidelberg University, 69115 Heidelberg, Germany
- Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), 69120 Heidelberg, Germany
- German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Correspondence: ; Tel.: +49-6221421300
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Yu S, Feng Y, Qu C, Yu F, Mao Z, Wang C, Li W, Li X. Vitamin D receptor methylation attenuates the association between physical activity and type 2 diabetes mellitus: A case-control study. J Diabetes 2022; 14:97-103. [PMID: 34751501 PMCID: PMC9060074 DOI: 10.1111/1753-0407.13239] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 10/12/2021] [Accepted: 11/03/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Physical activity and vitamin D receptor (VDR) have been associated with type 2 diabetes mellitus (T2DM). However, the associations of VDR methylation with T2DM and physical activity remained unknown. We aimed to investigate whether VDR methylation was a link between physical activity and T2DM. METHODS A 1:1 matching case-control study was designed based on the Henan Rural Cohort Study, including 272 pairs of T2DM patients and nonpatients. Physical activity level was assessed using the International Physical Activity Questionnaire. The high-resolution melt method was applied to determine the methylation level of the promoter region of VDR. The association between physical activity and T2DM was analyzed with a conditional logistic regression model. The effect modification of VDR methylation levels on the association between physical activity and T2DM was conducted. A multivariate correlation analysis model was applied to investigate correlations of VDR methylation with insulin sensitivity. RESULTS Physical activity level was associated with T2DM risk (crude model: odds ratio [OR] 0.611; 95% CI, 0.416-0.897; adjusted model: OR 0.619; 95% CI, 0.418-0.917). In effect modification analysis, the effects of physical activity on T2DM were stronger for low VDR methylation levels than for high (P = .025). Moreover, VDR methylation levels were associated with insulin (r = -0.089, P = .039) as well as homeostatic model assessment of insulin resistance (r = -0.098, P = .022). CONCLUSIONS The methylation status of the VDR promoter is associated with the secretion and sensitivity of insulin. VDR methylation attenuates the association between physical activity and T2DM, indicating that proactively physical activity may reduce the risk of T2DM, especially in people with low VDR methylation level.
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Affiliation(s)
- Songcheng Yu
- College of Public HealthZhengzhou UniversityZhengzhouChina
| | - Yinhua Feng
- College of Public HealthZhengzhou UniversityZhengzhouChina
| | - Chenling Qu
- College of Grain Oil and Food ScienceHenan University of TechnologyZhengzhouChina
| | - Fei Yu
- College of Public HealthZhengzhou UniversityZhengzhouChina
| | - Zhenxing Mao
- College of Public HealthZhengzhou UniversityZhengzhouChina
| | - Chongjian Wang
- College of Public HealthZhengzhou UniversityZhengzhouChina
| | - Wenjie Li
- College of Public HealthZhengzhou UniversityZhengzhouChina
| | - Xing Li
- College of Public HealthZhengzhou UniversityZhengzhouChina
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Janjusevic M, Gagno G, Fluca AL, Padoan L, Beltrami AP, Sinagra G, Moretti R, Aleksova A. The peculiar role of vitamin D in the pathophysiology of cardiovascular and neurodegenerative diseases. Life Sci 2022; 289:120193. [PMID: 34864062 DOI: 10.1016/j.lfs.2021.120193] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/24/2021] [Accepted: 11/29/2021] [Indexed: 02/07/2023]
Abstract
Vitamin D is a hormone with both genomic and non-genomic actions. It exerts its activity by binding vitamin D receptor (VDR), which belongs to the superfamily of nuclear receptors and ligand-activated transcription factors. Since VDR has been found in various tissues, it has been estimated that it regulates approximately 3% of the human genome. Several recent studies have shown pleiotropic effects of vitamin D in various processes such as cellular proliferation, differentiation, DNA repair and apoptosis and its involvement in different pathophysiological conditions as inflammation, diabetes mellitus, and anemia. It has been suggested that vitamin D could play an important role in neurodegenerative and cardiovascular disorders. Moderate to strong associations between lower serum vitamin D concentrations and stroke and cardiovascular events have been identified in different analytic approaches, even after controlling for traditional demographic and lifestyle covariates. The mechanisms behind the associations between vitamin D and cerebrovascular and cardiologic profiles have been widely examined both in animal and human studies. Optimization of vitamin D levels in human subjects may improve insulin sensitivity and beta-cell function and lower levels of inflammatory markers. Moreover, it has been demonstrated that altered gene expression of VDR and 1,25D3-membrane-associated rapid response steroid-binding (1,25D3-MARRS) receptor influences the role of vitamin D within neurons and allows them to be more prone to degeneration. This review summarizes the current understanding of the molecular mechanisms underlying vitamin D signaling and the consequences of vitamin D deficiency in neurodegenerative and cardiovascular disorders.
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Affiliation(s)
- Milijana Janjusevic
- Cardiothoracovascular Department, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI) and Department of Medical Surgical and Health Science, University of Trieste, 34149 Trieste, Italy
| | - Giulia Gagno
- Cardiothoracovascular Department, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI) and Department of Medical Surgical and Health Science, University of Trieste, 34149 Trieste, Italy
| | - Alessandra Lucia Fluca
- Cardiothoracovascular Department, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI) and Department of Medical Surgical and Health Science, University of Trieste, 34149 Trieste, Italy
| | - Laura Padoan
- Cardiology and Cardiovascular Physiopathology, Azienda Ospedaliero-Universitaria S. Maria della Misericordia, 06156 Perugia, Italy
| | - Antonio Paolo Beltrami
- Clinical Pathology Department, Azienda Sanitaria Universitaria Friuli Centrale (ASUFC) and Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
| | - Gianfranco Sinagra
- Cardiothoracovascular Department, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI) and Department of Medical Surgical and Health Science, University of Trieste, 34149 Trieste, Italy
| | - Rita Moretti
- Department of Internal Medicine and Neurology, Neurological Clinic, Complex Case Section, Trieste, Italy
| | - Aneta Aleksova
- Cardiothoracovascular Department, Azienda Sanitaria Universitaria Giuliano Isontina (ASUGI) and Department of Medical Surgical and Health Science, University of Trieste, 34149 Trieste, Italy.
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Jia Y, Song T, Li Z, Zhou L, Chen S. The Relationship Between Triglyceride Glucose Index and Vitamin D in Type 2 Diabetes Mellitus. Diabetes Metab Syndr Obes 2022; 15:511-525. [PMID: 35221702 PMCID: PMC8865864 DOI: 10.2147/dmso.s348845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 02/04/2022] [Indexed: 11/29/2022] Open
Abstract
PURPOSE The study aimed to investigate the relationship between 25-hydroxyvitamin D [25(OH) D] and triglyceride glucose index (TyG) levels in male and female patients with type 2 diabetes mellitus (T2DM). PATIENTS AND METHODS This cross-sectional study recruited 592 patients with type 2 diabetes. The subjects were divided into the non-vitamin D deficiency group [25(OH)D≥20ng/mL] and the vitamin D deficiency group [25(OH)D<20ng/mL]. The triglyceride glucose (TyG) index is calculated using the following formula, ln[fasting triglycerides (mg/dL)*fasting blood glucose (mg/dL)/2]. Participants were divided into high TyG group and low TyG group, with the median of TyG as the boundary. All participants were divided into male and female groups and normal Body mass index (BMI) and high BMI groups, and then divided into high TyG group and low TyG group. RESULTS We found that TyG levels are independently and negatively correlated with vitamin D levels in male patients with T2DM. In the female group, there was no significant correlation between TyG and vitamin D levels, regardless of an adjusted or unadjusted confounding factor. Subgroup analysis showed that the correlation between TyG and the risk of vitamin D deficiency in the normal BMI group was significantly stronger than that in the high BMI group. CONCLUSION This study indicates that vitamin D deficiency is related to high TyG level in patients with T2DM for males, and this relationship is not significant for female patients. The risk of vitamin D deficiency is significantly correlated with high TyG level in normal BMI group. However, there was no statistically significant difference between TyG level and the risk of vitamin D deficiency in the high BMI group. Difference between TyG level and the risk of vitamin D deficiency.
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Affiliation(s)
- Yujiao Jia
- Graduate School of Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Tiantian Song
- Shijiazhuang Second Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Zelin Li
- Graduate School of Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Linling Zhou
- Graduate School of Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Shuchun Chen
- Graduate School of Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Endocrinology, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
- Hebei Key Laboratory of Metabolic Diseases, Shijiazhuang, Hebei, People’s Republic of China
- Correspondence: Shuchun Chen, Department of Endocrinology, Hebei General Hospital, 348 Heping West Road, Shijiazhuang, Hebei, 050051, People’s Republic of China, Tel/Fax +86 31185988406, Email
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11
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Lu Y, Wang Y, Sun Y, Li Y, Wang J, Zhao Y, Yang F, Gao X, Xu J, Tong Z. Effects of active vitamin D on insulin resistance and islet β-cell function in non-diabetic chronic kidney disease patients: a randomized controlled study. Int Urol Nephrol 2021. [PMID: 34807347 DOI: 10.1007/s11255-021-02968-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 07/25/2021] [Indexed: 11/25/2022]
Abstract
Purpose The purpose of the study is to observe the effects of active vitamin D supplementation on insulin resistance and islet β-cell function (HOMA-β) in patients with non-diabetic chronic kidney disease (NDCKD). Methods A total of 134 patients with NDCKD who met the inclusion criteria were enrolled in the prospective controlled study and categorized as such: 60 patients in the non-dialysis (ND) group; 36, hemodialysis (HD) group; and 38, peritoneal dialysis (PD) group. Each group was divided into two equal-numbered subgroups for vitamin D supplementation. Those in the experimental subgroups received calcitriol 0.5 ug/day orally, and were followed-up for 6 months. A total of 117 patients were followed-up, including 57 patients in the ND group; 29, HD group; and 31, PD group. Changes in the insulin resistance index (HOMA-IR) and HOMA-β index were calculated and compared at the time of enrollment and after 1, 3, and 6 months of intervention. Results (1) Mean HOMA-IR value: In the ND group, mean HOMA-IR value of the experimental group significantly decreased compared with that of the control group after 3 months of intervention (P = 0.02). In the HD and PD groups, there was no statistical difference between the experimental and control groups (P > 0.05). (2) Mean HOMA-β index: In the ND group, mean HOMA-β index of the experimental group was higher than that of the control group after 1 month of active vitamin D treatment (P = 0.03), and, with an extended intervention time, the index gradually increased (P < 0.001). In the HD group, mean HOMA-β index of the experimental group was higher than that of the control group after 3 months of active vitamin D treatment (P = 0.01). Among PD patients, mean HOMA-β index of the patients in the experimental group was higher than that of the control group after 6 months of active vitamin D treatment (P = 0.02). Conclusions Active vitamin D supplementation improved insulin resistance and HOMA-β after 6 months in ND patients, but only improved HOMA-β in the dialysis patients, with no significant effect on insulin resistance.
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12
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Zhang Z, Liang X, Tong L, Lv Y, Yi H, Gong P, Tian X, Cui Q, Liu T, Zhang L. Effect of Inonotus obliquus (Fr.) Pilat extract on the regulation of glycolipid metabolism via PI3K/Akt and AMPK/ACC pathways in mice. J Ethnopharmacol 2021; 273:113963. [PMID: 33640441 DOI: 10.1016/j.jep.2021.113963] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/21/2021] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Inonotus obliquus (Fr.) Pilat is a mushroom belonging to the family Hymenochaetaceae. It is popularly called the Chaga mushroom in Russian folk medicine and has been used as a traditional medicine to treat diabetes mellitus in Eastern European and Asian countries. However, its effects on glycolipid metabolism disorders and underlying molecular mechanism of action remain unclear. AIM OF THE STUDY I. obliquus contains abundant functional components, which provide potential medicinal value. The purpose of this study was to investigate compositions of I. obliquus extract with a high-pressure water extraction method, and investigate the anti-type 2 diabetic effects of I. obliquus extract and the possible underlying mechanisms involved. MATERIALS AND METHODS The I. obliquus was extracted by a high-pressure water extraction method, and tested its main components by special assay kit and instrumental analysis. Type 2 diabetic C57BL/6 mice were induced by high-fat diet with low-dose STZ injection, and were daily gavaged with different doses of I. obliquus extract for 8 weeks. Glycemic, blood lipid profile, and histopathology of liver and pancreas were assessed. Underlying mechanisms related to glycemic control in liver were further performed. RESULTS The I. obliquus extract main compounds were β-Glucans, triterpenoids and polyphenol by determination. Oral administration of 250 mg/kg and 500 mg/kg I. obliquus extract significantly alleviated blood glucose and insulin resistance. Moreover, 250 mg/kg and 500 mg/kg of I. obliquus extract increased liver glycogen content and high-density lipoprotein cholesterol (HDL-C) levels while decreased total cholesterol (TC), triglyceride (TG) and low-density lipoprotein cholesterol (LDL-C) levels. Furthermore, the protein expression levels of phosphatidylinositol-3 kinase (PI3K), p-protein kinase B (Akt), p-adenosine monophosphate activated protein kinase (AMPK), and p-acetyl-CoA carboxylase (ACC) were upregulated, whereas sterol regulatory element-binding protein-1c (SREBP-1c) and fatty acid synthase (FAS) were downregulated after supplement with 250 mg/kg and 500 mg/kg of I. obliquus extract. Interestingly, I. obliquus extract was a dose-effect relationship within a certain range. 250 mg/kg had obvious anti-diabetes effect, and the effect of 500 mg/kg dose was the same as that of metformin. CONCLUSION I. obliquus extract ameliorated insulin resistance and lipid metabolism disorders in diabetic mice. The hypoglycemic and hypolipidemic properties of I. obliquus extract were supposedly exerted via the regulation of the PI3K/Akt and AMPK/ACC signaling pathways.
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Affiliation(s)
- Zhe Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Xi Liang
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Lingjun Tong
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Youyou Lv
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Huaxi Yi
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Pimin Gong
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Xiaoying Tian
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Qingyu Cui
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Tongjie Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China.
| | - Lanwei Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China.
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13
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Abstract
Cardiovascular disease (CVD) is a major cause of morbidity and mortality worldwide. Vitamin D deficiency has been identified as a potential risk factor for a number of diseases unrelated to the classical skeletal pathophysiology, such as cancer and CVD, but the effects of vitamin D supplementation are less clear. Purpose of this narrative review is to discuss the evidence suggesting an association between vitamin D status and CVD as well as the results of supplementation studies. Vitamin D deficiency has been associated with CVD risk factors such as hypertension, dyslipidemia and diabetes mellitus as well as with cardiovascular events such as myocardial infarction, stroke and heart failure. While vitamin D deficiency might contribute to the development of CVD through its association with risk factors, direct effects of vitamin D on the cardiovascular system may also be involved. Vitamin D receptors are expressed in a variety of tissues, including cardiomyocytes, vascular smooth muscle cells and endothelial cells. Moreover, vitamin D has been shown to affect inflammation, cell proliferation and differentiation. While observational studies support an association between low plasma vitamin D levels and increased risk of CVD, Mendelian randomization studies do not support a causal association between the two. At present, high quality randomized trials do not find evidence of significant effects on CVD endpoints and do not support supplementation of vitamin D to decrease CVD events.
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Affiliation(s)
- Ioanna Gouni-Berthold
- Polyclinic for Endocrinology, Diabetes and Preventive Medicine, University of Cologne, Cologne, Germany
| | - Heiner K Berthold
- Department of Internal Medicine and Geriatrics, Bethel Clinic (EvKB), Bielefeld, Germany
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Quach K, Abdelmasih M, Chen PX, Li Y, Famure O, Nash M, Prasad R, Perkins BA, Yip PM, Kim SJ. Vitamin D Levels and the Risk of Posttransplant Diabetes Mellitus After Kidney Transplantation. Prog Transplant 2021; 31:133-141. [PMID: 33789542 PMCID: PMC8182337 DOI: 10.1177/15269248211002796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Introduction: Given the burden of posttransplant diabetes mellitus and the high prevalence
of low vitamin D levels in kidney transplant recipients, it is reasonable to
consider vitamin D as a novel and potentially modifiable risk factor in this
patient population. Research question: To determine the association between 25- hydroxyvitamin D (25(OH)D) level and
posttransplant diabetes among kidney transplant recipients. Design: In a
multi-center cohort study of 442 patients who received a kidney transplant
between January 1, 2005 and December 31, 2010, serum samples within one-year
before transplant were analyzed for 25(OH)D levels. The association between
25(OH)D and posttransplant diabetes were examined in Cox proportional hazard
models. Results: The median 25(OH)D level was 66 nmol/L. The cumulative probability of
diabetes at 12-months by quartiles of 25(OH)D (< 42, 42 to 64.9, 65 to
94.9, and > 95 nmol/L) were 23.4%, 26.9%, 21.4%, and 15.6%, respectively.
Compared to the highest 25(OH)D quartile, hazard ratios (95% CI) for the
risk were 1.85 (1.03, 3.32), 2.01 (1.12, 3.60), 1.77 (0.96, 3.25) across the
first to third quartiles, respectively. The associations were accentuated in
a model restricted to patients on tacrolimus. When modeled as a continuous
variable, 25(OH)D levels were significantly associated with a higher risk of
diabetes (hazard ratio 1.06, 95% CI: 1.01, 1.13 per 10 nmol/L decrease). Discussion: Serum 25(OH)D was an independent predictor of posttransplant diabetes in
kidney transplant recipients. These results may inform the design of trials
using vitamin D to reduce the risk in kidney transplant recipients.
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Affiliation(s)
- Kevin Quach
- Division of Nephrology and the Kidney Transplant Program, 7989University Health Network, Toronto, Ontario, Canada
| | - Monica Abdelmasih
- Division of Nephrology and the Kidney Transplant Program, 7989University Health Network, Toronto, Ontario, Canada
| | - Pei Xuan Chen
- Division of Nephrology and the Kidney Transplant Program, 7989University Health Network, Toronto, Ontario, Canada
| | - Yanhong Li
- Division of Nephrology and the Kidney Transplant Program, 7989University Health Network, Toronto, Ontario, Canada
| | - Olusegun Famure
- Division of Nephrology and the Kidney Transplant Program, 7989University Health Network, Toronto, Ontario, Canada
| | - Michelle Nash
- Division of Nephrology, St. Michael's Hospital and 7938University of Toronto, Toronto, Ontario, Canada
| | - Ramesh Prasad
- Division of Nephrology, St. Michael's Hospital and 7938University of Toronto, Toronto, Ontario, Canada
| | - Bruce A Perkins
- Division of Endocrinology, Universal Health Network and 7938University of Toronto, Toronto, Ontario, Canada.,Institute of Health Policy, Management and Evaluation, 7938University of Toronto, Toronto, Ontario, Canada
| | - Paul M Yip
- Laboratory Medicine and Pathobiology, University Health Network and 7938University of Toronto, Toronto, Ontario, Canada.,Division of Clinical Biochemistry, 7938University of Toronto, Toronto, Ontario, Canada
| | - S Joseph Kim
- Division of Nephrology and the Kidney Transplant Program, 7989University Health Network, Toronto, Ontario, Canada.,Division of Nephrology, St. Michael's Hospital and 7938University of Toronto, Toronto, Ontario, Canada.,Institute of Health Policy, Management and Evaluation, 7938University of Toronto, Toronto, Ontario, Canada
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15
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Ebadi SA, Sharifi L, Rashidi E, Ebadi SS, Khalili S, Sadeghi S, Afzali N, Shiri SM. Supplementation with vitamin D and insulin homeostasis in healthy overweight and obese adults: A randomized clinical trial. Obes Res Clin Pract 2021; 15:256-261. [PMID: 33744225 DOI: 10.1016/j.orcp.2021.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 02/20/2021] [Accepted: 03/05/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Hypovitaminosis D which is a frequent problem in overweight and obese individuals, seems to interfere with cells responsible for control of glycemic status. Therefore, the current research intended to study the impact of supplementation with vitamin D on insulin homeostasis among healthy obese and overweight individuals. METHODS The current study was conducted among obese or overweight individuals who had hypovitaminosis D. After separation of participants into two groups, one group received vitamin D pearls (50,000 IU/weekly) for eight weeks, whereas another group received a placebo over the same period. Next, the level of vitamin D, fasting blood sugar (FBS), fasting insulin, Homeostasis Model Assessment 2 for Insulin Resistance (HOMA2-IR), Function of β-cell (HOMA2-β), and Insulin Sensitivity (HOMA2-S) and lipid profile of participants were evaluated. RESULTS Overall, 67.2% of the participants were female. No considerable difference was observed concerning biochemical parameters among the study groups at baseline. After eight weeks, the mean (SD) level of vitamin D was significantly lower in the placebo group than those in the vitamin D group. (38.6 ± 8.1 vs. 14.9 ± 6.4; P < 0.001). The patients who received vitamin D had significant lower levels of FBS (P < 0.001), fasting insulin (P < 0.001), HOMA2-IR (P < 0.001), and HOMA2-β (P = 0.03), than the placebo group. The HOMA2-S was significantly enhanced in vitamin D group, while it reduced in another group (P < 0.001). However, no considerable decrease was found in triglyceride, cholesterol, high-density lipoprotein or low-density lipoprotein. CONCLUSION Supplementation with vitamin D improved sensitivity to insulin and pancreatic function of β cells of healthy overweight and obese adults.
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Affiliation(s)
- Seyed Alireza Ebadi
- Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Laleh Sharifi
- Uro-Oncology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Elaheh Rashidi
- Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Seyed Shayan Ebadi
- Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Shayesteh Khalili
- Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Soheila Sadeghi
- Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Nikta Afzali
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
| | - Sakineh Moghadam Shiri
- Endocrine Research Center, Institute of Endocrinology and Metabolism, Iran University of Medical Sciences, Tehran, Iran.
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16
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Vondra K, Hampl R. Vitamin D and new insights into pathophysiology of type 2 diabetes. Horm Mol Biol Clin Investig 2021; 42:203-208. [PMID: 33655734 DOI: 10.1515/hmbci-2020-0055] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 02/11/2021] [Indexed: 01/09/2023]
Abstract
Deficiency in vitamin D plays a role in the onset and development of insulin resistance (IR) and type 2 diabetes (T2DM). A normal level of vitamin D is able to reduce low grade inflammation, which is a major process in inducing insulin resistance. It is also engaged in maintaining low resting levels of reactive species and radicals, normal Ca2+ signaling, a low expression of pro-inflammatory cytokines but increased formation of anti-inflammatory cytokines. Vitamin D is also able to prevent hypermethylation (of DNA) and consequent functional inactivation of many genes, as well as other epigenetic alterations in β cells and in other insulin-sensitive peripheral tissues, mainly liver, adipose tissue and muscle. Vitamin D deficiency thus belongs to key factors accelerating the development of IR and consequently T2DM as well. However, vitamin D supplementation aimed at the control of glucose homeostasis in humans showed controversial effects. As a result, further studies are running to gain more detailed data needed for the full clinical utilization of vitamin D supplementation in the prevention and treatment of T2DM. Until new results are published, supplementation with high doses of vitamin D deficiency is not recommended. However, prevention of vitamin D deficiency and its correction are highly desired.
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Affiliation(s)
- Karel Vondra
- Institute of Endocrinology, Prague, Czech Republic
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17
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Al-Shafei AI, Rayis DA, Mohieldein AH, El-Gendy OA, Adam I. Maternal early pregnancy serum level of 25-Hydroxyvitamin D and risk of gestational diabetes mellitus. Int J Gynaecol Obstet 2020; 152:382-385. [PMID: 32976628 DOI: 10.1002/ijgo.13389] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 07/15/2020] [Accepted: 09/18/2020] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To assess if early pregnancy (≤14 weeks of gestation) 25-hydroxyvitamin D (25(OH)D) level is associated with risk of gestational diabetes mellitus (GDM). METHODS A nested case-control study (60 women in each arm) was conducted at Saad Abualila Hospital (Khartoum, Sudan) during the period of January to November 2017. Clinical and obstetrical data were gathered, 25(OH)D concentration was measured at the first prenatal visit, and a 75-g oral glucose tolerance test was performed at 24-28 weeks of gestation. RESULTS Compared with women without GDM, in women with GDM, the median of the 25(OH)D level was significantly lower (7.3 [interquartile range 5.7-8.8] ng/mL versus 8.4 [interquartile range 6.6-11.9] ng/mL, P=0.001). All women in the study (with and without GDM) had vitamin D deficiency (25(OH)D<20 ng/mL). The results of the logistic regression showed that a low 25(OH)D level was the only factor associated with GDM (odds ratio [OR] 0.83, 95% confidence interval [CI] 0.73-0.95, P=0.010). Women with 25(OH)D less than 6.0 ng/mL were at a higher risk of GDM (OR 3.2, 95% CI 1.29-8.12, P=0.012). CONCLUSION A low 25(OH)D level in early pregnancy was associated with increased risk of GDM. This finding might be useful in predicting GDM.
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Affiliation(s)
- Ahmad I Al-Shafei
- Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Kingdom of Saudi Arabia
| | - Duria A Rayis
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | | | - Ola A El-Gendy
- Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Kingdom of Saudi Arabia
| | - Ishag Adam
- Department of Obstetrics and Gynecology, Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Saudi Arabia
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18
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Liang F, Quan Y, Wu A, Chen Y, Xu R, Zhu Y, Xiong J. Insulin-resistance and depression cohort data mining to identify nutraceutical related DNA methylation biomarker for type 2 diabetes. Genes Dis 2020; 8:669-676. [PMID: 34291138 PMCID: PMC8278533 DOI: 10.1016/j.gendis.2020.01.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/18/2020] [Accepted: 01/21/2020] [Indexed: 11/29/2022] Open
Abstract
Insulin-resistance (IR) is one of the most important precursors of type 2 diabetes (T2D). Recent evidence suggests an association of depression with the onset of T2D. Accumulating evidence shows that depression and T2D share common biological origins, and DNA methylation examination might reveal the link between lifestyle, disease risk, and potential therapeutic targets for T2D. Here we hypothesize that integrative mining of IR and depression cohort data will facilitate predictive biomarkers identification for T2D. We utilized a newly proposed method to extract gene-level information from probe level data on genome-wide DNA methylation array. We identified a set of genes associated with IR and depression in clinical cohorts. By overlapping the IR-related nutraceutical-gene network with depression networks, we identified a common subnetwork centered with Vitamin D Receptor (VDR) gene. Preliminary clinical validation of gene methylation set in a small cohort of T2D patients and controls was established using the Sequenome matrix-assisted laser desorption ionization-time flight mass spectrometry. A set of sites in the promoter regions of VDR showed a significant difference between T2D patients and controls. Using a logistic regression model, the optimal prediction performance of these sites was AUC = 0.902,and an odds ratio = 19.76. Thus, monitoring the methylation status of specific VDR promoter region might help stratify the high-risk individuals who could potentially benefit from vitamin D dietary supplementation. Our results highlight the link between IR and depression, and the DNA methylation analysis might facilitate the search for their shared mechanisms in the etiology of T2D.
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Affiliation(s)
- Fengji Liang
- Lab of Epigenetics and Advanced Health Technology, SPACEnter Space Science and Technology Institute, Shenzhen, Guangdong Province, 518117, PR China.,State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, PR China
| | - Yuan Quan
- Lab of Epigenetics and Advanced Health Technology, SPACEnter Space Science and Technology Institute, Shenzhen, Guangdong Province, 518117, PR China.,School of Computer Science and Technology, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong Province, 518055, PR China
| | - Andong Wu
- Lab of Epigenetics and Advanced Health Technology, SPACEnter Space Science and Technology Institute, Shenzhen, Guangdong Province, 518117, PR China
| | - Ying Chen
- Lab of Epigenetics and Advanced Health Technology, SPACEnter Space Science and Technology Institute, Shenzhen, Guangdong Province, 518117, PR China
| | - Ruifeng Xu
- School of Computer Science and Technology, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong Province, 518055, PR China
| | - Yuexing Zhu
- Lab of Epigenetics and Advanced Health Technology, SPACEnter Space Science and Technology Institute, Shenzhen, Guangdong Province, 518117, PR China
| | - Jianghui Xiong
- Lab of Epigenetics and Advanced Health Technology, SPACEnter Space Science and Technology Institute, Shenzhen, Guangdong Province, 518117, PR China.,State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, PR China
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Zhao F, Liu X, Wang Z, Lang H, Zhang T, Wang R, Lin X, He D, Shi P, Pang X. Novel Mouse miRNA Chr13_novelMiR7354-5p Improves Bone-Marrow-Derived Mesenchymal Stem Cell Differentiation into Insulin-Producing Cells. Mol Ther Nucleic Acids 2020; 19:1110-1122. [PMID: 32059337 PMCID: PMC7016162 DOI: 10.1016/j.omtn.2020.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 12/22/2019] [Accepted: 01/02/2020] [Indexed: 12/18/2022]
Abstract
MicroRNAs (miRNAs) that play key roles in the generation of insulin-producing cells from stem cells provide a cell-based approach for insulin replacement therapy. In this study, we used next-generation sequencing to detect the miRNA expression profile of normal mouse pancreatic β cells, non-β cells, bone marrow mesenchymal stem cells (BM-MSCs), and adipose-derived stem cells (ADSCs) and determined relative miRNA expression levels in mouse pancreatic β cells. After the novel mouse miRNA candidates were identified using miRDeep 2.0, we found that Chr13_novelMiR7354-5p, a novel miRNA candidate, significantly promoted the differentiation of BM-MSCs into insulin-producing cells in vitro. Furthermore, Chr13_novelMiR7354-5p-transfected BM-MSCs reversed hyperglycemia in streptozotocin (STZ)-treated diabetic mice. In addition, bioinformatics analyses, a luciferase reporter assay, and western blotting demonstrated that Chr13_novelMiR7354-5p targeted Notch1 and Rbpj. Our results provide compelling evidence of the existence of 65 novel mouse miRNA candidates and present a new treatment strategy to generate insulin-producing cells from stem cells.
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Affiliation(s)
- Feng Zhao
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, 77 Puhe Street, Shenbei New District, Shenyang City 110122, Liaoning Province, China
| | - Xiaoyu Liu
- Department of Obstetrics and Gynecology, Center for Assisted Reproduction, Shengjing Hospital of China Medical University, 39 Huaxiang Street, Tiexi District, Shenyang City 110022, Liaoning Province, China
| | - Zhe Wang
- Department of Pathology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang City 110004, Liaoning Province, China
| | - Hongxin Lang
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, 77 Puhe Street, Shenbei New District, Shenyang City 110122, Liaoning Province, China
| | - Tao Zhang
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, 77 Puhe Street, Shenbei New District, Shenyang City 110122, Liaoning Province, China
| | - Rui Wang
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, 77 Puhe Street, Shenbei New District, Shenyang City 110122, Liaoning Province, China
| | - Xuewen Lin
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, 77 Puhe Street, Shenbei New District, Shenyang City 110122, Liaoning Province, China
| | - Dan He
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, 77 Puhe Street, Shenbei New District, Shenyang City 110122, Liaoning Province, China
| | - Ping Shi
- Shenyang Amnion Bioengineering and Technology R&D Center, 155-5 Chuangxin Street, Hunnan District, Shenyang City 110015, Liaoning Province, China
| | - Xining Pang
- Department of Stem Cells and Regenerative Medicine, Shenyang Key Laboratory for Stem Cells and Regenerative Medicine, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, 77 Puhe Street, Shenbei New District, Shenyang City 110122, Liaoning Province, China; Shenyang Amnion Bioengineering and Technology R&D Center, 155-5 Chuangxin Street, Hunnan District, Shenyang City 110015, Liaoning Province, China.
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20
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Cao XY, Liu D, Bi RC, He YL, He Y, Liu JL. The protective effects of a novel polysaccharide from Lentinus edodes mycelia on islet β (INS-1) cells damaged by glucose and its transportation mechanism with human serum albumin. Int J Biol Macromol 2019; 134:344-353. [DOI: 10.1016/j.ijbiomac.2019.05.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 05/05/2019] [Accepted: 05/05/2019] [Indexed: 12/13/2022]
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Chen H, Nie Q, Hu J, Huang X, Zhang K, Pan S, Nie S. Hypoglycemic and Hypolipidemic Effects of Glucomannan Extracted from Konjac on Type 2 Diabetic Rats. J Agric Food Chem 2019; 67:5278-5288. [PMID: 30964673 DOI: 10.1021/acs.jafc.9b01192] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Diabetes and its complications are one of the most concerned metabolic diseases worldwide and threaten human health severely. Hypoglycemic and hypolipidemic effects of glucomannan extracted from konjac on high-fat diet and streptozocin-induced type 2 diabetic rats were evaluated in this study. Administration of konjac glucomannan significantly decreased the levels of fasting blood glucose, serum insulin, glucagon-like peptide 1, and glycated serum protein. The concentrations of serum lipids, including total cholesterol, triacylglycerols, low-density lipoprotein cholesterol, and non-esterified fatty acid, were notably reduced by konjac glucomannan treatment. In addition, antioxidant capacity, pancreatic injury, and adipose cell hypertrophy were ameliorated by konjac glucomannan administration in type 2 diabetic rats. Besides, ultra performance liquid chromatography-quadrupole time-of-flight mass spectrometry-based lipidomics analysis was used to explore the improvement of lipid metabolic by konjac glucomannan treatment. The disturbance of glycerolipid (diacylglycerol, monoacylglycerol, and triacylglycerol), fatty acyl (acylcarnitine and hydroxyl fatty acid), sphingolipid (ceramide and sphingomyelin), and glycerophospholipid (phosphatidylcholine) metabolism were attenuated by the glucomannan treatment. This study provided new insights for investigating the anti-diabetic effects of konjac glucomannan and suggests that konjac glucomannan may be a promising nutraceutical for treating type 2 diabetes.
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Affiliation(s)
- Haihong Chen
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China
| | - Qixing Nie
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China
| | - Jielun Hu
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China
| | - Xiaojun Huang
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China
| | - Ke Zhang
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China
| | - Shijie Pan
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China
| | - Shaoping Nie
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China
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Switkowski KM, Camargo, CA, Perron P, Rifas-Shiman SL, Oken E, Hivert MF. Cord blood vitamin D status is associated with cord blood insulin and c-peptide in two cohorts of mother-newborn pairs. J Clin Endocrinol Metab 2019; 104:3785-3794. [PMID: 31127822 PMCID: PMC6656419 DOI: 10.1210/jc.2018-02550] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 04/17/2019] [Indexed: 01/12/2023]
Abstract
CONTEXT Vitamin D may be important for prenatal programming of insulin and glucose regulation, but maternal vitamin D deficiency during pregnancy is common. OBJECTIVE We examined associations of early vitamin D status with markers of fetal insulin secretion (cord blood insulin and c-peptide). We hypothesized that maternal 25-hydroxyvitamin D (25(OH)D) during pregnancy and cord blood 25(OH)D would both be positively associated with cord blood insulin and c-peptide. METHODS We studied mother-newborn pairs from two cohorts: Project Viva (862 pairs included) and Genetics of Glucose Regulation in Gestation and Growth (Gen3G, 660 pairs included). We analyzed associations of the cord blood hormones with maternal 25(OH)D using generalized additive models with nonlinear spline terms and with cord blood 25(OH)D using multivariable linear regression models. RESULTS 25(OH)D levels were <75 nmol/L in over 70% of mothers and 85% of newborns. Maternal and cord blood 25(OH)D levels were correlated: r=0.58 in Project Viva and 0.37 in Gen3G. Maternal 25(OH)D had an inverted U-shaped relationship with cord blood insulin and c-peptide in both cohorts. Cord blood 25(OH)D had a linear relationship with the cord blood hormones. In fully adjusted models, each 10-nmol/L increase in cord blood 25(OH)D was associated with higher cord blood insulin and c-peptide concentrations: 3.7% (95% CI: (0.09, 7.5) and 3.2% (95% CI: 0.8, 5.6), respectively in Project Viva; 2.2% (95% CI: -0.1, 4.6) and 3.6% (95% CI: 1.0, 6.3), respectively in Gen3G. CONCLUSIONS Vitamin D may play a role in regulating fetal insulin secretion, potentially impacting glucose regulation and growth.
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Affiliation(s)
- Karen M Switkowski
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
- Correspondence and Reprint Requests: Karen M. Switkowski, PhD, Department of Population Medicine, Harvard Medical School and the Harvard Pilgrim Health Care Institute, Landmark Center, 401 Park Drive, Suite 401 E, Boston, Massachusetts 02215. E-mail:
| | - Carlos A Camargo,
- Emergency Medicine Network, Massachusetts General Hospital, Boston, Massachusetts
| | - Patrice Perron
- Division of Endocrinology, Department of Medicine, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Sheryl L Rifas-Shiman
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
| | - Emily Oken
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
- Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts
| | - Marie-France Hivert
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts
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Guareschi ZM, Valcanaia AC, Ceglarek VM, Hotz P, Amaral BK, de Souza DW, de Souza TA, Nardelli T, Ferreira TR, Leite NC, Lubackzeuski C, de O Emilio HR, Grassiolli S. The effect of chronic oral vitamin D supplementation on adiposity and insulin secretion in hypothalamic obese rats. Br J Nutr. 2019;121:1334-1344. [PMID: 30924427 DOI: 10.1017/S0007114519000667] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Reduced plasma vitamin D (VD) levels may contribute to excessive white adipose tissue, insulin resistance (IR) and dyslipidaemia. We evaluated the effect of chronic oral VD supplementation on adiposity and insulin secretion in monosodium glutamate (MSG)-treated rats. During their first 5 d of life, male neonate rats received subcutaneous injections of MSG (4 g/kg), while the control (CON) group received saline solution. After weaning, groups were randomly distributed into VD supplemented (12 µg/kg; three times/week) and non-supplemented (NS) rats, forming four experimental groups (n 15 rats/group): CON-NS, CON-VD, MSG-NS and MSG-VD. At 76 d of life, rats were submitted to an oral glucose tolerance test (OGTT; 2 g/kg), and at 86 d, obesity, IR and plasma metabolic parameters were evaluated. Pancreatic islets were isolated for glucose-induced insulin secretion (GIIS), cholinergic insulinotropic response and muscarinic 3 receptor (M3R), protein kinase C (PKC) and protein kinase A (PKA) expressions. Pancreas was submitted to histological analyses. VD supplementation decreased hyperinsulinaemia (86 %), hypertriacylglycerolaemia (50 %) and restored insulin sensibility (89 %) in MSG-VD rats, without modifying adiposity, OGTT or GIIS, compared with the MSG-NS group. The cholinergic action was reduced (57 %) in islets from MSG-VD rats, without any change in M3R, PKA or PKC expression. In conclusion, chronic oral VD supplementation of MSG-obese rats was able to prevent hyperinsulinaemia and IR, improving triacylglycerolaemia without modifying adiposity. A reduced cholinergic pancreatic effect, in response to VD, could be involved in the normalisation of plasma insulin levels, an event that appears to be independent of M3R and its downstream pathways.
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24
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Bornstedt ME, Gjerlaugsen N, Pepaj M, Bredahl MKL, Thorsby PM. Vitamin D Increases Glucose Stimulated Insulin Secretion from Insulin Producing Beta Cells (INS1E). Int J Endocrinol Metab 2019; 17:e74255. [PMID: 30881469 PMCID: PMC6408731 DOI: 10.5812/ijem.74255] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 10/25/2018] [Accepted: 12/11/2018] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Vitamin D affects the pancreatic beta cell function and in vitro studies have shown that vitamin D may influence insulin secretion, apoptosis, and gene regulation. However, the outcomes have differed and there has been uncertainty regarding the effect of different vitamin D metabolites on insulin secretion. OBJECTIVES We hypothesized that vitamin D could increase insulin secretion in insulin producing beta cells and investigated the effect of 25(OH) vitamin D and 1,25(OH)2 vitamin D on insulin secretion. METHODS The study was conducted in INS1E cells, an established insulinoma cell line from rat. The cells were divided into three groups; a control group, a group with 1,25(OH)2 vitamin D enriched medium (10 nM), and a group with 25(OH) vitamin D (10 nM) supplemented medium. After 72 hours of treatment, the cells underwent glucose stimulation at different concentrations (0, 5, 11, and 22 mM) for 60 minutes. RESULTS INS1E cells treated with 1,25(OH)2 vitamin D showed a trend towards increased insulin secretion at all glucose concentrations compared to control cells and at 22 mM glucose, the difference was significant (18.40 +/- 1.97 vs 12.90 +/- 2.22 nmol/L, P < 0.05). However, pretreatment with 25(OH) vitamin D did not show any significant increase in insulin secretion compared to cells without vitamin D treatment. There was no difference in insulin secretion in cells not stimulated with glucose. CONCLUSIONS Treatment with 1,25(OH)2 vitamin D combined with high levels of glucose increased insulin secretion in INS1E cells, whereas 25(OH) vitamin D had no effect. This suggests that glucose stimulated insulin secretion in INS1E beta cells appears to be related to the type of vitamin D metabolite treatment.
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Affiliation(s)
- Mette Eskild Bornstedt
- Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Corresponding Author: Hormone Laboratory, Departement of Medical Biochemistry, Oslo University Hospital, Oslo, Norway.
| | - Nina Gjerlaugsen
- Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Milaim Pepaj
- Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - May K L Bredahl
- Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Per M Thorsby
- Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
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Abstract
Type 2 diabetes (T2D) is a global health issue and dedifferentiation plays underlying causes in the pathophysiology of T2D; however, there is a lack of understanding in the mechanism. Dedifferentiation results from the loss of function of pancreatic β-cells alongside a reduction in essential transcription factors under various physiological stressors. Our study aimed to establish db/db as an animal model for dedifferentiation by using RNA sequencing to compare the gene expression profile in islets isolated from wild-type, db/+ and db/db mice, and qPCR was performed to validate those significant genes. A reduction in both insulin secretion and the expression of Ins1, Ins2, Glut2, Pdx1 and MafA was indicative of dedifferentiation in db/db islets. A comparison of the db/+ and the wild-type islets indicated a reduction in insulin secretion perhaps related to the decreased Mt1. A significant reduction in both Rn45s and Mir6236 was identified in db/+ compared to wild-type islets, which may be indicative of pre-diabetic state. A further significant reduction in RasGRF1, Igf1R and Htt was also identified in dedifferentiated db/db islets. Molecular characterisation of the db/db islets was performed via Ingenuity analysis which identified highly significant genes that may represent new molecular markers of dedifferentiation.
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Affiliation(s)
- Abraham Neelankal John
- Harry Perkins Institute of Medical Research, Centre for Medical Research, University of Western Australia, Nedlands, WA, Australia.
- School of Medicine And Pharmacology, University of Western Australia, Carwley, WA, Australia.
- Islet Cell Development Program, Harry Perkins Institute of Medical Research, Nedlands, Verdun St, Perth Western, 6009, Australia.
| | - Ramesh Ram
- Harry Perkins Institute of Medical Research, Centre for Medical Research, University of Western Australia, Nedlands, WA, Australia
- School of Medicine And Pharmacology, University of Western Australia, Carwley, WA, Australia
| | - Fang-Xu Jiang
- Harry Perkins Institute of Medical Research, Centre for Medical Research, University of Western Australia, Nedlands, WA, Australia.
- School of Medicine And Pharmacology, University of Western Australia, Carwley, WA, Australia.
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