6533b827fe1ef96bd1286575

RESEARCH PRODUCT

Dynamics of Torque Teno virus plasma DNAemia in allogeneic stem cell transplant recipients

Paula AmatDaniele FocosiCarlos SolanoEliseo AlbertTania PascualFabrizio MaggiLisa MaceraIgnacio TorresDavid NavarroEstela Giménez

subject

0301 basic medicineAdultMaleHomologousTorque teno virusAdolescentLymphocyteAllogeneic hematopoietic stem cell transplantation (Allo-HSCT); Immune reconstitution; Torque Teno virus (TTV); TTV DNAemia; Adolescent; Adult; Aged; DNA Virus Infections; DNA Viral; Female; Humans; Immunocompromised Host; Leukocyte Count; Male; Middle Aged; Retrospective Studies; Torque teno virus; Transplantation Homologous; Viral Load; Viremia; Young Adult; Hematopoietic Stem Cell Transplantation; Virology; Infectious Diseases030106 microbiologyTTV DNAemiaFlow cytometry03 medical and health sciencesImmunocompromised HostLeukocyte CountYoung AdultVirologyMedicineTransplantation HomologousHumansIn patientViralViremiaProspective cohort studyAgedRetrospective StudiesTorque teno virusTransplantationmedicine.diagnostic_testbusiness.industryHematopoietic Stem Cell TransplantationDNAImmune reconstitutionMiddle AgedViral LoadDNA Virus Infectionssurgical procedures operative030104 developmental biologymedicine.anatomical_structureInfectious DiseasesAllogeneic hematopoietic stem cell transplantation (Allo-HSCT); Immune reconstitution; Torque Teno virus (TTV); TTV DNAemia; Adolescent; Adult; Aged; DNA Virus Infections; DNA; Viral; Female; Humans; Immunocompromised Host; Leukocyte Count; Male; Middle Aged; Retrospective Studies; Torque teno virus; Transplantation; Homologous; Viral Load; Viremia; Young Adult; Hematopoietic Stem Cell Transplantation; Virology; Infectious DiseasesImmunologyDNA ViralAllogeneic hematopoietic stem cell transplantation (Allo-HSCT)FemaleAllogeneic hematopoietic stem cell transplantStem cellImmunocompetencebusinessTorque Teno virus (TTV)

description

Abstract Background Torque Teno virus (TTV) plasma DNA load directly correlate with the level of immunosuppresion in different clinical settings. It is uncertain whether this may be the case in allogeneic hematopoietic stem cell transplant recipients (allo-HSCT). Objectives We characterized the dynamics of TTV DNAemia in patients undergoing T-cell replete allo-SCT. Study design Retrospective single-center observational study including 72 allo-HSCT patients. Plasma TTV DNA loads were quantified before initiating the conditioning regimen and at different time-points after transplant by real-time PCR. White blood cells (WBC) and absolute lymphocyte counts (ALC) were measured by flow cytometry. Results A dramatic drop in plasma TTV DNA load was observed shortly after conditioning. The TTV DNA load increased steadily after engraftment reaching its peak at day +90 after transplant. The increase in TTV DNA load paralleled that of ALC, and was of greater magnitude in patients who developed severe (grades II–IV) acute graft vs. host disease. Conclusion Repopulation of lymphocytes early after allo-HSCT correlates with an increase of plasma TTV DNA load. Prospective studies are nevertheless needed to determine whether the kinetics of TTV DNAemia may allow inference of the degree of overall immunocompetence in these patients.

10.1016/j.jcv.2017.07.001http://hdl.handle.net/11568/908095