Massachusetts Biologic Laboratories
Adolescent; Adult; Aged; Antibodies, Bacterial; Antibody Formation; Child; Child, Preschool; Female; Hematopoietic Stem Cell Transplantation; Humans; *Immunization; Male; Middle Aged; Pneumococcal Infections; Pneumococcal Vaccines; Time Factors; *Tissue Donors; Transplantation, Homologous; Vaccines, Conjugate
Medical Cell Biology | Medical Immunology
Patients undergoing hematopoietic cell transplantation (HCT) are at increased risk for infections with Streptococcus pneumoniae and have long-lasting, impaired antibody responses to pneumococcal polysaccharide vaccines. We examined whether donor immunization with a heptavalent pneumococcal conjugate vaccine (PCV7) would elicit protective antibody responses to additional doses of vaccine administered early after transplantation. Ninety-six patients scheduled to receive an allogeneic hematopoietic cell transplant were randomized with their donors to receive either a dose of PCV7 vaccine or no vaccine before transplantation. All patients received PCV7 at 3 months, 6 months, and 12 months following transplantation, and serotype-specific antibody concentrations were determined after each dose. Following HCT, geometric mean antibody concentrations of patients in the immunized donor group were significantly higher for 5 of the 7 vaccine serotypes after one dose (P <.05) and for 4 of the 7 serotypes after 2 doses of vaccine (P <.03). Sixty-seven percent of patients in the immunized donor group had presumed protective IgG concentrations more than or equal to 0.50 microg/mL to all 7 serotypes following the first dose of vaccine compared to 36% in the unimmunized donor group (P =.05). After the third dose of vaccine, both groups had more than 60% of patients with concentrations at least 0.50 microg/mL to all vaccine serotypes. Donor immunization enhances early antibody responses of patients undergoing HCT to pneumococcal conjugate vaccine. A 3-dose schedule of PCV7 vaccine at 3, 6, and 12 months is immunogenic in these patients regardless of donor immunization.
DOI of Published Version
Blood. 2003 Feb 1;101(3):831-6. Epub 2002 Sep 19. Link to article on publisher's site
Molrine, Deborah; Antin, Joseph H.; Guinan, Eva C.; Soiffer, Robert J.; MacDonald, Kristin; Malley, Richard; Malinoski, Frank J.; Trocciola, Susan; Wilson, Marjorie; and Ambrosino, Donna M., "Donor immunization with pneumococcal conjugate vaccine and early protective antibody responses following allogeneic hematopoietic cell transplantation" (2002). Open Access Articles. 280.