Pediatric solid organ transplant recipients demonstrate robust cell-mediated and humoral responses to three doses of mRNA SARS-CoV-2 vaccine.

Autor: Bratic JS; Department of Pediatrics, Stanford University, Stanford, California, USA., Gans HA; Division of Infectious Diseases, Department of Pediatrics, Stanford University, Stanford, California, USA., Chen SF; Division of Infectious Diseases, Department of Pediatrics, Stanford University, Stanford, California, USA., Banaei N; Department of Pathology, Stanford University, Stanford, California, USA., Johnston EM; Stanford Maternal and Child Health Research Institute, Stanford, California, USA., Sear K; Division of Gastroenterology, Hepatology & Nutrition, Department of Pediatrics, Stanford University, Stanford, California, USA., Samreth S; Department of Pediatrics, Stanford University, Stanford, California, USA., Nadimpalli SS; Division of Infectious Diseases, Department of Pediatrics, Stanford University, Stanford, California, USA.
Jazyk: angličtina
Zdroj: American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons [Am J Transplant] 2022 Dec; Vol. 22 (12), pp. 3047-3052. Date of Electronic Publication: 2022 Sep 21.
DOI: 10.1111/ajt.17195
Abstrakt: Pediatric solid organ transplant recipients (pSOTR) often demonstrate suboptimal vaccine responses and are not included in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine efficacy trials. This population has shown variable humoral immunity following SARS-CoV-2 vaccination, and no studies have assessed cell-mediated responses after SARS-CoV-2 vaccination in pSOTR. SARS-CoV-2-specific interferon-gamma release assay (IGRA), immunoglobulin G (IgG), and receptor-binding domain (RBD)-angiotensin-converting enzyme 2 (ACE2) blocking antibody (Ab) were measured in pSOTR aged 5-17 years after 2-3 doses of SARS-CoV-2 mRNA vaccine. In all, 33 subjects were included, with 25 tested after the second dose of mRNA vaccine (V2) and 21 tested after the third dose of mRNA vaccine (V3). Of the 19 subjects who had IgG testing after V3, 100.0% (19/19) had a positive IgG response. Of the 17 subjects who had IGRA testing after V3, 94.1% (16/17) had a positive IGRA response. RBD-ACE2 blocking antibody increased significantly from V2 to V3 (p = .007). Subjects <1 year from transplant demonstrated a significantly larger increase in RBD-ACE2 blocking Ab from V2 to V3 than did those >1 year from transplant (p = .05). SARS-CoV-2 vaccination induces humoral and cell-mediated responses in the majority of pSOTR, with improved quantitative humoral response after three doses.
(© 2022 The American Society of Transplantation and the American Society of Transplant Surgeons.)
Databáze: MEDLINE
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