Human Cytomegalovirus (HCMV)-Specific Antibody Response and Development of Antibody-Dependent Cellular Cytotoxicity Against HCMV After Lung Transplantation.

The Journal of Infectious Diseases
Hannes VietzenElisabeth Puchhammer-Stöckl

Abstract

Human cytomegalovirus (HCMV) may cause severe infections in lung transplant recipients (LTRs). The impact of the host antibody (AB)-dependent cytotoxicity (ADCC) on HCMV is still unclear. Therefore, we analyzed the AB-response against HCMV glycoprotein B (gB) and the pentameric complex (PC) and the ADCC response in HCMV-seropositive (R+) LTRs and in seronegative recipients of positive organs (D+/R-). Plasma samples were collected from 35 R+ and 28 D+/R- LTRs for 1 (R+) or 2 (D+/R-) years posttransplantation and from 114 healthy control persons. The PC- and gB-specific ABs were assessed by enzyme-linked immunosorbent assay. The ADCC was analyzed by focal expansion assay and CD107 cytotoxicity assay. In R+ LTRs, significantly higher gB-specific AB levels developed within 1 year posttransplantation than in controls (immunoglobulin [Ig]G1, P < .001; IgG3, P < .001). In addition, higher levels of ADCC were observed by FEA and CD107 assay in R+ patients compared with controls (P < .001). In 23 D+R- patients, HCMV-specific ABs developed. Antibody-dependent cytotoxicity became detectable 3 months posttransplantation in these, with higher ADCC observed in viremic patients. Depletion of gB- and PC-specific ABs revealed that, in particula...Continue Reading

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Antibody-Dependent Cell Cytotoxicity

Antibody-dependent cellular toxicity refers to the lysis of a target cell by a non-sensitized effector cell of the immune system as a result of antibodies binding to the target cell membrane and engaging the Fc receptors on the immune effector cells. Find the latest research on antibody-dependent cellular toxicity here.

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