Frequencies of human influenza-specific antibody secreting cells or plasmablasts post vaccination from fresh and frozen peripheral blood mononuclear cells.
J Immunol Methods
; 340(1): 42-7, 2009 Jan 01.
Article
en En
| MEDLINE
| ID: mdl-18996127
ABSTRACT
The rise in influenza-specific neutralizing antibody levels is proceeded by a burst of antigen-specific antibody secreting cells (ASC) or plasmablasts identified in peripheral blood approximately 5-10 days post immunization. Blood antigen-specific ASC may function as an immune marker of vaccine responses in comparison to the pre- and post-neutralizing titers; however, some have questioned whether there is adequate survival of ASC isolated from peripheral blood after freezing, making multi-center vaccine trials difficult. Here, we demonstrate similar frequencies of influenza-specific ASC from fresh and frozen peripheral blood mononuclear cells (PBMC). Influenza Hemagglutinin (HA) H1, H3, and H7-specific ASC IgG ELISpots frequencies were compared from the same fresh and frozen PBMC 7 days after 2006 Trivalent Influenza Vaccine (TIV) in 10 young healthy subjects. H1-, H3-, and H7-specific IgG ASC spots/10(6) from fresh PBMC on day 7 were 229+/-341, 98+/-90, and 6+/-11 respectively. Total IgG ASC spots/million PBMC pre- and 7-day post-vaccination were 290+/-188 (0.029% PBMC) and 1691+/-836 (0.17% PBMC) respectively. There was no difference in the H1 -H3-, and total specific ASC IgG ELISpot frequencies from the fresh versus frozen PBMC on day 7 (p=0.43, 0.28, 0.28 respectively). These results demonstrate feasibility of testing whether antigen-specific ASC from frozen PBMC are an early biomarker of long-term antibody responses in multi-center vaccine trials.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Leucocitos Mononucleares
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Vacunas contra la Influenza
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Gripe Humana
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Subtipo H1N1 del Virus de la Influenza A
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Subtipo H3N2 del Virus de la Influenza A
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Células Productoras de Anticuerpos
Límite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
J Immunol Methods
Año:
2009
Tipo del documento:
Article
País de afiliación:
Estados Unidos