AI Article Synopsis
- The study evaluated how stable C-peptide levels are over time in individuals with long-standing type 1 diabetes, focusing on both fasting C-peptide and responses after a mixed-meal tolerance test (MMTT).
- Among 607 participants, only 25% showed detectable fasting C-peptide, with levels significantly decreasing over one year, and patients with higher levels were generally diagnosed at an older age and had shorter disease duration.
- The findings indicated that stimulated C-peptide was found in 10% more participants during MMTT compared to fasting tests, and results from MMTT at 90 and 120 minutes closely matched overall C-peptide area under the curve measurements.
Article Abstract
Aims: This study aims to evaluate the stability of C-peptide over time and to compare fasting C-peptide and C-peptide response after mixed-meal tolerance test (MMTT) at T90 or T120 with C-peptide area under the curve (AUC) in long-standing type 1 diabetes.
Methods: We included 607 type 1 diabetes individuals with diabetes duration >5 years. C-peptide concentrations (ultrasensitive assay) were collected in the fasting state, and in a subpopulation after MMTT (T0, just prior to, T30-T60-T90-T120, 30-120 min after ingestion of mixed-meal) (n = 168). Fasting C-peptide concentrations (in n = 535) at Year 0 and Year 1 were compared. The clinical determinants associated with residual C-peptide secretion and the correspondence of C-peptide at MMTT T90 / T120 and total AUC were assessed.
Results: A total of 153 participants (25%) had detectable fasting serum C-peptide (i.e ≥ 3.8 pmol/L). Fasting C-peptide was significantly lower at Year 1 (p < 0.001, effect size = -0.16). Participants with higher fasting C-peptide had a higher age at diagnosis and shorter disease duration and were less frequently insulin pump users. Overall, 109 of 168 (65%) participants had both non-detectable fasting and post-meal serum C-peptide concentrations. The T90 and T120 C-peptide values at MMTT were concordant with total AUC. In 17 (10%) individuals, C-peptide was only detectable at MMTT and not in the fasting state.
Conclusions: Stimulated C-peptide was detectable in an additional 10% of individuals compared with fasting in individuals with >5 years of diabetes duration. T90 and T120 MMTT measurements showed good concordance with the MMTT total AUC. Overall, there was a decrease of C-peptide at 1-year follow-up.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10107202 | PMC |
| http://dx.doi.org/10.1111/dme.15012 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Dysregulation of Metabolic Peptides Precedes Hyperinsulinemia and Inflammation Following Exposure to Rotenone in Rats.
Cells
January 2025
Ralph H. Johnson Veterans Administration Medical Center, 109 Bee Street, Charleston, SC 29401, USA.
Rotenone, a naturally occurring compound derived from the roots of tropical plants, is used as a broad-spectrum insecticide, piscicide, and pesticide. It is a classical, high-affinity mitochondrial complex I inhibitor that causes not only oxidative stress, α-synuclein phosphorylation, DJ-1 (Parkinson's disease protein 7) modifications, and inhibition of the ubiquitin-proteasome system but it is also widely considered an environmental contributor to Parkinson's disease (PD). While prodromal symptoms, such as loss of smell, constipation, sleep disorder, anxiety/depression, and the loss of dopaminergic neurons in the substantia nigra of rotenone-treated animals, have been reported, alterations of metabolic hormones and hyperinsulinemia remain largely unknown and need to be investigated.
View Article and Find Full Text PDFOptimizing proinsulin production in E. coli BL21 (DE3) using taguchi method and efficient one-step insulin purification by on-column enzymatic cleavage.
Braz J Microbiol
January 2025
Faculty of Material Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran.
Diabetes is a critical worldwide health problem. Numerous studies have focused on producing recombinant human insulin to address this issue. In this research, the process factors of production of recombinant His-tagged proinsulin in E.
View Article and Find Full Text PDFThe Association between Pregnancy Complications and Long-Term Maternal Cardiometabolic Health in the MIREC Cohort Study.
J Clin Endocrinol Metab
January 2025
Centre de Recherche du CHUS, and Department of Obstetrics and gynecology, University of Sherbrooke. Sherbrooke, Québec, Canada.
Context: During pregnancy, women who experience certain pregnancy complications show elevations in biomarkers of inflammation and insulin resistance; however, few studies have examined these cardiometabolic biomarkers in the decade following pregnancy.
Objective: To examine the association between pregnancy complications and cardiometabolic biomarkers 9 years postpartum including: blood pressure, blood lipids, body fat percentage, insulin resistance (glucose, insulin, proinsulin, C-peptide, HOMA-IR, HbA1c, leptin, adiponectin) and inflammation (hs-C-reactive protein).
Methods: Using data from the Maternal-Infant Research on Environmental Chemicals (MIREC) cohort study (2008-2021) we determined 3 groups of pregnancy complications: 1) hypertensive disorders of pregnancy (HDP) (n=35); any pregnancy complication in the index pregnancy, defined as preterm birth, HDP, impaired glucose tolerance or gestational diabetes mellitus (GDM) (n=55); or self-reported recurrence of one of these pregnancy complications (n=19).
Long-Term Islet Graft Functional Assessments in More than 500 Patients Undergoing Total Pancreatectomy with Intraportal Islet Autotransplantation.
J Am Coll Surg
January 2025
Departments of Surgery, University of Minnesota Medical School Department of Pediatrics, University of Minnesota Medical School Division of Biostatistics and Health Data Science, School of Public Health, University of Minnesota.
Background: Total pancreatectomy and intraportal islet cell auto transplantation (TPIAT) is increasingly being offered to patients with refractory chronic pancreatitis. Understanding factors that impact islet function over time is critical.
Study Design: We evaluated factors associated with islet function over 12 years post TPIAT using mixed meal tolerance testing (MMTT).
Therapeutic effects of composite probiotics derived from fermented camel milk on metabolic dysregulation and intestinal barrier integrity in type 2 diabetes rats.
Front Pharmacol
January 2025
School of Pharmacy, Xinjiang Medical University, Urumchi, China.
Background: In the Kazakh community of Xinjiang, China, fermented camel milk has been traditionally used to manage diabetes. This study evaluates the effects of composite probiotics derived from fermented camel milk (CPCM) on metabolic disturbances in a rat model of Type 2 diabetes (T2DM).
Methods: T2DM was induced in Wistar rats using streptozotocin.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!