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  • Ovid Technologies (Wolters Kluwer Health)  (2)
  • 1
    In: Transplantation, Ovid Technologies (Wolters Kluwer Health), Vol. 105, No. 10 ( 2021-10), p. 2316-2323
    Abstract: Immunization of varicella-zoster virus (VZV)-seronegative solid organ transplant (SOT) patients using the live-attenuated varicella vaccine is generally contraindicated, leaving no widely applicable immunization option. The recombinant subunit herpes zoster vaccine (RZV) is indicated for VZV-seropositive persons to prevent shingles but could potentially also protect VZV-seronegative persons against varicella. We performed a safety and immunogenicity evaluation of RZV in VZV-seronegative SOT recipients as an option for protection. Methods. VZV-seronegative adult SOT patients with no history of varicella/shingles vaccine or disease were given 2 doses of RZV vaccine 2–6 mo apart. Blood was drawn prevaccination (V1), before the second dose (V2), and 4 wk after the second dose (V3). Humoral immunity (anti-glycoprotein E) and cell-mediated immunity were evaluated, with polyfunctional cells defined as cells producing ≥2 cytokines. Results. Among 31 eligible VZV-seronegative SOT patients screened, 23 were enrolled. Median age was 38 y and median time since transplant procedure was 3.8 y. The most frequent transplant types were liver (35%) and lung (30%). Median anti-glycoprotein E levels significantly increased from V1 to V3 ( P  = 0.001) and V2 to V3 ( P   〈  0.001), even though only 55% had a positive seroresponse. Median polyfunctional CD4 T-cell counts increased from V1 to V2 (54/10 6 versus 104/10 6 cells; P  = 0.041) and from V2 to V3 (380/10 6 ; P  = 0.002). Most adverse events were mild with no rejection episodes. Conclusions. RZV was safe and elicited significant humoral and cellular responses in VZV-seronegative SOT patients and has the potential to be considered as a preventive strategy against primary varicella.
    Type of Medium: Online Resource
    ISSN: 0041-1337
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 2035395-9
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  • 2
    In: Transplantation, Ovid Technologies (Wolters Kluwer Health), Vol. 105, No. 10 ( 2021-10), p. 2175-2183
    Abstract: Several studies have described the clinical features of COVID-19 in solid-organ transplant recipients. However, many have been retrospective or limited to more severe cases (hospitalized) and have not routinely included serial virological sampling (especially in outpatients) and immunologic assessment. Methods. Transplant patients diagnosed with COVID-19 based on a respiratory sample PCR were prospectively followed up to 90 d. Patients provided consent for convalescent serum samples and serial nasopharyngeal swabs for SARS-CoV-2 antibody (antinucleoprotein and anti-RBD) and viral load, respectively. Results. In the 161 SOT recipients diagnosed with COVID-19, the spectrum of disease ranged from asymptomatic infection (4.3%) to hospitalization (60.6%), supplemental oxygen requirement (43.1%), mechanical ventilation (22.7%), and death (15.6%). Increasing age (OR, 1.031; 95% CI, 1.001-1.062; P  = 0.046) and ≥2 comorbid conditions (OR, 3.690; 95% CI, 1.418-9.615; P  = 0.007) were associated with the need for supplemental oxygen. Allograft rejection was uncommon (3.7%) despite immunosuppression modification. Antibody response at ≥14 d postsymptoms onset was present in 90% (anti-RBD) and 76.7% (anti-NP) with waning of anti-NP titers and stability of anti-RBD over time. Median duration of nasopharyngeal positivity was 10.0 d (IQR, 5.5–18.0) and shedding beyond 30 d was observed in 6.7% of patients. The development of antibody did not have an impact on viral shedding. Conclusions. This study demonstrates the spectrum of COVID-19 illness in transplant patients. Risk factors for severe disease are identified. The majority form antibody by 2 wk with differential stability over time. Prolonged viral shedding was observed in a minority of patients. Reduction of immunosuppression was a safe strategy.
    Type of Medium: Online Resource
    ISSN: 0041-1337
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 2035395-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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