Developmental and reproductive safety evaluation of AV7909 anthrax vaccine candidate in rats.

Abstract:

:The AV7909 vaccine, consists of the Anthrax Vaccine Adsorbed (AVA) bulk drug substance and the immunostimulatory Toll-like receptor 9 agonist oligodeoxynucleotide adjuvant CPG 7909. The purpose of this research was to evaluate the potential maternal, reproductive, and developmental toxicity of AV7909 in rats to support licensure for use in women of childbearing potential. Groups of first generation (F0 ) female Sprague Dawley rats were dosed by intramuscular injection with water for injection, adjuvant or AV7909 at a volume of 0.5 ml/dose. Each rat received three vaccinations: 14 days prior to start of the mating period, on the first day of the mating period and on gestation day (GD) 7. There was no maternal mortality. Body weights, weight gain, and food consumption were comparable between groups. Findings in F0 females were limited to transient injection site edema and nodules consistent with immunostimulatory effects of the vaccine and adjuvant. Administration of AV7909 did not affect mating, fertility, pregnancy, embryo-fetal viability, growth, or morphologic development, parturition, maternal care of offspring or postnatal survival, growth, or development. There was no evidence of systemic inflammation in pregnant rats, based on evaluation of serum concentrations of the acute phase proteins alpha-2-macroglobulin and alpha-1-acid glycoprotein on GD 21. Anthrax lethal toxin-neutralizing antibodies were detected in AV7909-vaccinated F0 females. The antibodies were also detected in the sera of fetuses and F1 pups. Exposure of the fetuses and pups to maternally derived anthrax lethal toxin-neutralizing antibodies was not associated with developmental toxicity.

journal_name

Birth Defects Res

journal_title

Birth defects research

authors

Mylchreest E,Smiley MA,Ballin JD,Blauth B,Shearer J,Reece J,Ionin B,Savransky V

doi

10.1002/bdr2.1815

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

32-42

issue

1

issn

2472-1727

journal_volume

113

pub_type

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