by Daniel Brouse
March 11, 2023
Post-COVID patients are at an increased risk of developing or exacerbating diabetes.
In addition, the American Heart Association (AHA) states that diabetes often lowers HDL (good) cholesterol levels and raises triglycerides and LDL (bad) cholesterol levels.
Both blood sugar and cholesterol increase the risk for heart disease and stroke.
Coronavirus Transforms Pancreas Cell Function
When COVID infects cells, it impairs cell activity and can also change their function. When insulin-producing beta cells in the pancreas become infected with the virus, they produce much less insulin than usual, and also start to produce glucose and digestive enzymes. “We call this a change of cell fate,” said study leader Dr. Shuibing Chen, who described the work in a presentation at the annual meeting of the European Association for the Study of Diabetes.
It is not clear whether the changes are long-lasting, or if they might be reversible (though individuals have been impacted more than 3-years after infection), the researchers reported in Cell Metabolism in August 2021, SARS-CoV-2 infection induces beta cell transdifferentiation. “Single-cell RNA sequencing and immunostaining from ex vivo infections confirmed that multiple types of pancreatic islet cells were susceptible to SARS-CoV-2, eliciting a cellular stress response and the induction of chemokines. Upon SARS-CoV-2 infection, beta cells showed a lower expression of insulin and a higher expression of alpha and acinar cell markers, including glucagon and trypsin1, respectively, suggesting cellular transdifferentiation. Trajectory analysis indicated that SARS-CoV-2 induced eIF2-pathway-mediated beta cell transdifferentiation, a phenotype that could be reversed with trans-integrated stress response inhibitor (trans-ISRIB). Altogether, this study demonstrates an example of SARS-CoV-2 infection causing cell fate change, which provides further insight into the pathomechanisms of COVID-19.”
Diabetes Risk Rises After COVID
A March 2022 study published in the Journal Nature found, “Even mild SARS-CoV-2 infections can amplify a person’s chance of developing diabetes, especially for those already susceptible to the disease. People who get COVID-19 have a greater risk of developing diabetes up to a year later, even after a mild SARS-CoV-2 infection, compared with those who never had the disease.”
A study published in February of 2022 in JAMA, Diabetes After COVID-19 Infection, found COVID-19 Omicron infection is linked to new-onset diabetes. COVID-19 Omicron survivors may be at a greater than 60% risk of new-onset type 1 or 2 diabetes (a potential precursor of heart attack and stroke.)
A Cedars-Sinai news release said that data trends and patterns suggest that COVID-19 may act as a disease accelerator, amplifying the risk of an illness that may have come later in life. “So, it could be that instead of being diagnosed with diabetes by age 65, a person with preexisting risk for diabetes might—after a COVID-19 infection—be more likely to develop diabetes by age 45 or 55.”
The Pennsylvania State University meta-analysis Association of COVID‑19 with Diabetes included eight studies on new-onset type 1 or 2 diabetes in COVID-19 survivors published from December 2019 to October 2022. COVID-19 was tied to a 66% higher risk of new-onset diabetes regardless of age or sex. “Given the extraordinary number of COVID-19 survivors globally, the modest increase in diabetes risk could correspond to a drastic rise in the number of people diagnosed with the disease worldwide,” the authors wrote.
Cholesterol Levels
The study Risks and burdens of incident dyslipidaemia in long COVID found people with a prior COVID infection had a 24% increased risk for high cholesterol levels.
“These are people who never had cholesterol problems before,” said Dr. Ziyad Al-Aly, an author of the study and a clinical epidemiologist at Washington University in St. Louis. “Now, all of a sudden, they started having problems weeks and months after Covid-19.”
In June of 2023, the study Incidence of Diabetes in Children and Adolescents During the COVID-19 Pandemic was published in the Journal Nature and found COVID is linked to surge in child and teen diabetes.
Increased Risk of Heart Disease and Stroke
The Centers for Disease Control says, “High blood cholesterol is a major modifiable risk factor for heart disease, the leading cause of death in the United States. A 10% decrease in total blood cholesterol levels can reduce the incidence of heart disease by as much as 30%,” and “Over time, high blood sugar can damage blood vessels and the nerves that control your heart. People with diabetes are also more likely to have other conditions that raise the risk for heart disease.”
COVID: Hypertension, Heart-disease Risk Soars
Long COVID Update: Living With It