Dissecting the Interrelationship between COVID-19 and Diabetes Mellitus

Area of Science:

• Endocrinology
• Virology
• Immunology

Background:

• COVID-19, caused by SARS-CoV-2, has resulted in significant global morbidity and mortality.
• Diabetes Mellitus (DM) is a known risk factor for severe COVID-19, and emerging evidence links COVID-19 infection to new-onset DM.
• SARS-CoV-2 targets pancreatic islets, potentially causing beta-cell dysfunction and death, impacting glucose metabolism.

Purpose of the Study:

• To elucidate the mechanistic insights into how SARS-CoV-2 infects the pancreas and induces endocrine islet dysfunction and death.
• To review the interrelationship between COVID-19 and DM.
• To discuss potential therapeutic interventions for COVID-19-induced DM.

Main Methods:

• Review of existing literature on SARS-CoV-2 infection, pancreatic islet biology, and diabetes mellitus.
• Analysis of viral entry mechanisms into host cells and subsequent immunological responses.
• Examination of pancreatic autopsy findings in COVID-19 patients.

Main Results:

• SARS-CoV-2 infiltrates pancreatic islets, activating stress and inflammatory pathways, impairing glucose metabolism, and leading to beta-cell death.
• Viral particles have been identified within pancreatic beta-cells in autopsy samples from COVID-19 patients.
• The virus's interaction with pancreatic islets contributes to the development of new-onset diabetes.

Conclusions:

• SARS-CoV-2 infection poses a direct threat to pancreatic islet cells, potentially causing or exacerbating diabetes mellitus.
• Understanding these mechanisms is crucial for managing COVID-19 patients and addressing post-infection complications.
• Mesenchymal stem cells (MSCs) show promise as a future therapy for regenerating pancreatic beta-cells damaged by COVID-19.