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Nitric oxide-mediated cutaneous microvascular function is not altered in young adults following mild-to-moderate SARS CoV-2 infection.
Dillon, Gabrielle A; Wolf, S Tony; Alexander, Lacy M.
  • Dillon GA; Noll Laboratory, Department of Kinesiology, The Pennsylvania State University, University Park, Pennsylvania.
  • Wolf ST; Center for Healthy Aging, The Pennsylvania State University, University Park, Pennsylvania.
  • Alexander LM; Noll Laboratory, Department of Kinesiology, The Pennsylvania State University, University Park, Pennsylvania.
Am J Physiol Heart Circ Physiol ; 322(2): H319-H327, 2022 02 01.
Article in English | MEDLINE | ID: covidwho-1613119
ABSTRACT
Vascular dysfunction has been reported in adults who have recovered from COVID-19. To date, no studies have investigated the underlying mechanisms of persistent COVID-19-associated vascular dysfunction. Our purpose was to quantify nitric oxide (NO)-mediated vasodilation in healthy adults who have recovered from SARS-CoV-2 infection. We hypothesized that COVID-19-recovered adults would have impaired NO-mediated vasodilation compared with adults who have not had COVID-19. In methods, we performed a cross-sectional study including 10 (5 men/5 women, 24 ± 4 yr) healthy control (HC) adults who were unvaccinated for COVID-19, 11 (4 men/7 women, 25 ± 6 yr) healthy vaccinated (HV) adults, and 12 (5 men/7 women, 22 ± 3 yr) post-COVID-19 (PC, 19 ± 14 wk) adults. COVID-19 symptoms severity (survey) was assessed. A standardized 39°C local heating protocol was used to assess NO-dependent vasodilation via perfusion (intradermal microdialysis) of 15 mM NG-nitro-l-arginine methyl ester during the plateau of the heating response. Red blood cell flux was measured (laser-Doppler flowmetry) and cutaneous vascular conductance (CVC = flux/mmHg) was expressed as a percentage of maximum (28 mM sodium nitroprusside + 43°C). In results, the local heating plateau (HC 61 ± 20%, HV 60 ± 19%, PC 67 ± 19%, P = 0.80) and NO-dependent vasodilation (HC 77 ± 9%, HV 71 ± 7%, PC 70 ± 10%, P = 0.36) were not different among groups. Neither symptom severity (25 ± 12 AU) nor time since diagnosis correlated with the NO-dependent vasodilation (r = 0.46, P = 0.13; r = 0.41, P = 0.19, respectively). In conclusion, healthy adults who have had mild-to-moderate COVID-19 do not have altered NO-mediated cutaneous microvascular function.NEW & NOTEWORTHY Healthy young adults who have had mild-to-moderate COVID-19 do not display alterations in nitric oxide-mediated cutaneous microvascular function. In addition, healthy young adults who have COVID-19 antibodies from the COVID-19 vaccinations do not display alterations in nitric oxide-mediated cutaneous microvascular function.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Skin / Vasodilation / COVID-19 / Microcirculation Type of study: Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Topics: Long Covid / Vaccines Limits: Adult / Female / Humans / Male / Young adult Language: English Journal: Am J Physiol Heart Circ Physiol Journal subject: Cardiology / Physiology Year: 2022 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Skin / Vasodilation / COVID-19 / Microcirculation Type of study: Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Topics: Long Covid / Vaccines Limits: Adult / Female / Humans / Male / Young adult Language: English Journal: Am J Physiol Heart Circ Physiol Journal subject: Cardiology / Physiology Year: 2022 Document Type: Article