Table 1. SARS-CoV-2 detection in adipose tissue from deceased individuals.
Quantification of SARS-CoV-2 RNA detection by PCR from autopsy cases 1 to 8. All individuals were positive for SARS-CoV-2 by nasal swab when admitted to the hospital. Threshold cycles (Ct) presented are an average of three SARS-CoV-2 gene sequences for open reading frame 1ab (ORF1ab), spike (S), and nucleocapsid (N). RNA was isolated from either epicardial, visceral, or subcutaneous fat. Heart RNA samples were collected from a mixture of myocardium and epicardium. Some participants were used in previously published studies assessing SARS-CoV-2 infection in lungs and heart ( 31 – 33 ). N/A, not available; UD, undetectable. Autopsies 9 and 10 were used for ISH as shown in Fig. 1. All Ct values presented are an average of ORF1ab, S, and N genes. All heart RNA samples were collected from a mixture of myocardium and epicardium. Any Ct value below 37 was considered a true SARS-CoV-2 signal. Autopsies labeled with (*) were from a separate cohort.
RTqPCR for SARS-CoV-2 (Ct values) | |||||||||||
Autopsy # | Sex | Age (years) | Ethnicity | BMI (kg/m2) | DHBD (Days) | Comorbidities | Lung | Heart | Kidney | Adipose | Type of adipose analyzed |
1 | F | 84 | C | 24 | 12 | CAD, HTN, metastatic lung CA, T2D, AKI, dementia | UD | UD | UD | UD | Epicardial |
2 | M | 85 | C | 26 | 5 | HTN, dyslipidemia, T2D, prostate CA in remission, OSA, cirrhosis, leukemia in remission | 23 | 33 | 33 | 33 | Visceral |
3 | F | 81 | C | 26 | 4 | CAD, HTN, PAD, AKI, former smoker | 22 | 34 | 36 | 36 | Visceral |
4 | M | 71 | C | 24 | NH | PAD, CAD, valvular heart disease, AKI | 27 | 33 | UD | 33 | Visceral |
5 | M | 65 | C | 26 | 8 | Dyslipidemia, CAD, COPD, HTN, T2D, OSA, AKI | 23 | 34 | 34 | 33 | Epicardial |
6 | M | 89 | C | N/A | 5 | CAD, cardiomyopathy, dyslipidemia, T2D, OSA, former smoker, COPD | 21 | 31 | N/A | 28 | Epicardial |
7 | M | 85 | N/A | 30 | 5 | Former smoker, HTN, cardiomyopathy, COPD, AKI, dementia | 26 | 35 | UD | 34 | Subcutaneous |
8 | M | 58 | C | 47 | 7 | Former smoker, HTN, obesity, CAD, CHF, AKI | 35 | 37 | 33 | 36 | Subcutaneous |
9* | F | 78 | C | 35.2 | NH | obesity, AV-block III with pacemaker, HTN, cerebellar infarcts | N/A | N/A | N/A | 34 | Epicardial |
10* | F | 87 | C | N/A | 1 | Dementia, obesity, CAD, HTN, T2D | N/A | N/A | N/A | 32 | Epicardial |
Abbreviations: days of hospitalization before death (DHBD), not hospitalized (NH), not available (N/A), Caucasian (C), male (M), female (F), body mass index (BMI), coronary artery disease (CAD), hypertension (HTN), type 2 diabetes mellitus (T2D), cancer (CA), acute renal insufficiency (AKI), obstructive sleep apnea (OSA), peripheral artery disease (PAD), chronic obstructive pulmonary disease (COPD), congestive heart failure (CHF). |