Wang N, Yuan A, Ma J, Deng Z, Xue L. Sexing murine embryos with an indirect immunofluorescence assay using phage antibody B9-Fab against SDM antigen.
J Vet Med Sci 2015;
77:711-4. [PMID:
25715803 PMCID:
PMC4488409 DOI:
10.1292/jvms.14-0650]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The use of serologically detectable male (SDM; also called H-Y) antigens to identify male
embryos may be limited by the source of anti-SDM antibody. In the present study, novel
anti-SDM B9-Fab recombinant clones (obtained by chain shuffling of an A8 original clone)
were used to detect SDM antigens on murine embryos. Murine morulae and blastocysts (n=138)
were flushed from the oviducts of Kunming mice and incubated with anti-SDM B9-Fab for 30
min at 37°C. With an indirect immunofluorescence assay, the membrane and inner cell mass
had bright green fluorescence (presumptive males). Overall, 43.5% (60/138) were classified
as presumptive males and 56.5% (78/138) as presumptive females, with 85.0 and 88.5% of
these, respectively, confirmed as correct predictions (based on PCR analysis of a
male-specific [Sry] sequence). We concluded that the anti-SDM B9-Fab molecule had
potential for non-invasive, technically simple immunological sexing of mammalian
embryos.
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