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- Jain, Ruchi, et al.
(författare)
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Liver nucleotide biosynthesis is linked to protection from vascular complications in individuals with long-term type 1 diabetes
- 2020
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 10:1
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Tidskriftsartikel (refereegranskat)abstract
- Identification of biomarkers associated with protection from developing diabetic complications is a prerequisite for an effective prevention and treatment. The aim of the present study was to identify clinical and plasma metabolite markers associated with freedom from vascular complications in people with very long duration of type 1 diabetes (T1D). Individuals with T1D, who despite having longer than 30 years of diabetes duration never developed major macro- or microvascular complications (non-progressors; NP) were compared with those who developed vascular complications within 25 years from diabetes onset (rapid progressors; RP) in the Scandinavian PROLONG (n = 385) and DIALONG (n = 71) cohorts. The DIALONG study also included 75 healthy controls. Plasma metabolites were measured using gas and/or liquid chromatography coupled to mass spectrometry. Lower hepatic fatty liver indices were significant common feature characterized NPs in both studies. Higher insulin sensitivity and residual beta-cell function (C-peptide) were also associated with NPs in PROLONG. Protection from diabetic complications was associated with lower levels of the glycolytic metabolite pyruvate and APOCIII in PROLONG, and with lower levels of thiamine monophosphate and erythritol, a cofactor and intermediate product in the pentose phosphate pathway as well as higher phenylalanine, glycine and serine in DIALONG. Furthermore, T1D individuals showed elevated levels of picolinic acid as compared to the healthy individuals. The present findings suggest a potential beneficial shunting of glycolytic substrates towards the pentose phosphate and one carbon metabolism pathways to promote nucleotide biosynthesis in the liver. These processes might be linked to higher insulin sensitivity and lower liver fat content, and might represent a mechanism for protection from vascular complications in individuals with long-term T1D.
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- Ahrén, Bo, et al.
(författare)
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Changes in Prandial Glucagon Levels after 2-year Treatment with Vildagliptin or Glimepiride in Patients with Type 2 Diabetes Mellitus Inadequately Controlled with Metformin Monotherapy.
- 2010
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Ingår i: Diabetes Care. - : American Diabetes Association. - 1935-5548 .- 0149-5992. ; 33:4, s. 730-732
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Tidskriftsartikel (refereegranskat)abstract
- Objective - To determine if the dipeptidyl peptidase 4 inhibitor vildagliptin more effectively than the sulfonylurea glimepiride inhibits glucagon levels during meal. Research design and methods - Glucagon responses to a standard meal were measured at baseline and study endpoint (mean 1.8 years) in a trial evaluating add-on therapy to metformin with vildagliptin 50 mg bid compared to glimepiride up to 6 mg qd in type 2 diabetes (baseline HbA1c 7.3+/-0.6%). Results - HbA(1c) and prandial glucose AUC(0-2h) were reduced similarly in both groups, while prandial insulin AUC(0-2h) increased to a greater extent by glimepiride. Prandial glucagon AUC(0-2h) (baseline 66.6+/-2.3 pmol.h/l) decreased by 3.4+/-1.6 pmol.h/l by vildagliptin group (n=137) and increased by 3.8+/-1.7 pmolh/l by glimepiride group (n=121). The between-group difference was 7.3+/-2.1 pmol.h/l (p<0.001). Conclusion - Vildagliptin therapy but not glimepiride improves post-prandial alpha-cell function, which persists for at least 2 years.
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- Ferrannini, E, et al.
(författare)
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Differential Proteomics of Cardiovascular Risk and Coronary Artery Disease in Humans
- 2022
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Ingår i: Frontiers in cardiovascular medicine. - : Frontiers Media SA. - 2297-055X. ; 8, s. 790289-
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Tidskriftsartikel (refereegranskat)abstract
- Proteomics of atypical phenotypes may help unravel cardiovascular disease mechanisms.AimWe aimed to prospectively screen the proteome of four types of individuals: with or without coronary artery disease (CAD), each with or without multiple risk factors. Associations with individual risk factors and circulating biomarkers were also tested to provide a functional context to the protein hits.Materials and MethodsThe CAPIRE study (ClinicalTrials.gov Identifier: NCT02157662) is a cross-sectional study aimed at identifying possible new mechanisms promoting or protecting against atherothrombosis. Quantification (by aptamer technology), ranking (using partial least squares), and correlations (by multivariate regression) of ~5000 plasma proteins were performed in consecutive individuals aged 45–75 years, without previous cardiovascular disease, undergoing computed tomography angiography for suspected CAD, showing either >5/16 atherosclerotic segments (CAD+) or completely clean arteries (CAD−) and either ≤ 1 risk factor (RF+) or ≥3 risk factors (RF−) (based on history, blood pressure, glycemia, lipids, and smoking).ResultsOf 544 individuals, 39% were atypical (93 CAD+/RF−; 120 CAD−/RF+) and 61% typical (102 CAD+/RF+; 229 CAD−/RF−). In the comparison with CAD+/RF− adjusted for sex and age, CAD−/RF+ was associated with increased atrial myosin regulatory light chain 2 (MYO) and C-C motif chemokine-22 (C-C-22), and reduced protein shisa-3 homolog (PS-3) and platelet-activating factor acetylhydrolase (PAF-AH). Extending the analysis to the entire cohort, an additional 8 proteins were independently associated with CAD or RF; by logistic regression, the 12-protein panel alone discriminated the four groups with AUCROC's of 0.72–0.81 (overall p = 1.0e−38). Among them, insulin-like growth factor binding protein-3 is positively associated with RF, lower BMI, and HDL-cholesterol, renin with CAD higher glycated hemoglobin HbA1c, and smoking.ConclusionsIn a CCTA-based cohort, four proteins, involved in opposing vascular processes (healing vs. adverse remodeling), are specifically associated with low CAD burden in high CV-risk individuals (high MYO and C-C-22) and high CAD burden in low-risk subjects (high PS-3 and PAF-AH), in interaction with BMI, smoking, diabetes, HDL-cholesterol, and HbA1c. These findings could contribute to a deeper understanding of the atherosclerotic process beyond traditional risk profile assessment and potentially constitute new treatment targets.
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