Pesta 2023 MiP2023

From Bioblast

MiPsociety
       
MitoGlobal
       
MitoGlobal Events
       
MiPconference
       
MiPschool 2023
       


Pesta 2023 MiP2023

Dominik Pesta
Respiratory capacity of skeletal muscle and peripheral blood mononuclear cells of male and female individuals with type 2 diabetes.

Link: MiP2023 Obergurgl AT

Pesta Dominik (2023)

Event: MiP2023 Obergurgl AT

Authors: Buescher F-M, Schrage-Knoll Irmtrud, Bohmeier Maria, Kaiser-Stolz C, Kramme J, Rittweger J, Pesta Dominik

Introduction: Skeletal muscle mitochondrial function is altered in insulin resistant states. Its assessment, however, requires invasive muscle biopsies to obtain viable tissue for functional mitochondrial analysis. Blood cell-based bioenergetics potentially reflects systemic mitochondrial function. Here, we characterized respiratory capacity of skeletal muscle mitochondria and peripheral blood mononuclear cells (PBMCs) from patients with type 2 diabetes and assessed whether the latter reflect muscle mitochondrial respirometric measures.
Methods: For that purpose, 20 patients with type 2 diabetes (30 % female, 57Β±9 years, BMI 28Β±4 kg/m2) participated in this study. We obtained muscle biopsies from the M. vastus lateralis and venous blood samples to isolate PBMCs. High-resolution respirometry was performed in duplicate to assess mitochondrial respiration from permeabilized muscle fibers and PBMCs using an established SUIT-protocol.
Results and Discussion: Combined NADH-linked (N) electron transfer and succinate-linked (S) OXPHOS capacity was 59.4Β±13.0 pmol/(s*mg) for muscle and 16.6Β±5.3 pmol/(s*106 cells) for PBMCs. NS-OXPHOS capacity was not different between females and males for muscle (66.5Β±9.5 vs 56.3Β±13.0 pmol/(s*mg), p=0.10) or PBMCs (19.5Β±5.3 vs 15.3Β±5.0 pmol/(s*106), p=0.10), respectively. While PBMC mitochondrial function was not correlated with skeletal muscle respiratory function across several respiratory states (all p>0.05), muscle NS-OXPHOS capacity correlated negatively with diabetes disease duration (r=-0.50, p=0.02). These results suggest that there are no sex-specific differences with regard to muscle and PBMC mitochondrial function in individuals with type 2 diabetes. While bioenergetic phenotypes in PBMCs do not reflect muscle mitochondrial function in this cohort, diabetes disease duration negatively associates with muscle mitochondrial function.

β€’ Keywords: mitochondrial function, type 2 diabetes, blood cells, skeletal muscle

β€’ O2k-Network Lab: DE Cologne Pesta D


Affiliations and acknowledgements

BΓΌscher F-M1, Schrage I1, Bohmeier M1, Kaiser-Stolz C1, Kramme J1,2, Rittweger J1, Pesta D1,2,3
  1. German Aerospace Center (DLR), Institute of Aerospace Medicine, D-51147 Cologne, Germany.
  2. Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, D-50937 Cologne, Germany.
  3. Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, D-50931 Cologne, Germany.
Corresponding author: [email protected]
We wish to thank all patients and staff that participated in or helped with this study.


Labels: Pathology: Diabetes 


Tissue;cell: Skeletal muscle, Blood cells 



HRR: Oxygraph-2k  Event: Oral 


Cookies help us deliver our services. By using our services, you agree to our use of cookies.