Immunological Characteristics of the Vitellogenin Induced by $Estradiol-17\beta$ in Male Spotted Flounder, Verasper variegatus

범가자미, Verasper variegatus 수컷에서 $estradiol-17\beta$에 의해 유도된 vitellogenin의 면역학적 특성

Vitellogenin (Vg) was purified from plasma of $estradiol-17\beta(E_2)-treated$ spotted flounder, verasper variegatus, by preripitation with cold distilled water, followed by fractionation using a Sepharose CL-6B column chromatography. $E_2-induced$ protein was identified as Vg by SDS-PAGE and western blot analysis. The molecular weight of the purified Vg was estimated 175 kD as determined by SDS-PAGE. In order to measure the Vg level, monoclonal antibodies against Vg were produced by hybridoma technique. Purified Vg was immunized into Balb/c mice and then the spleen cells from mice were fused with NS-1 myeloma cells. The hybridoma cells were screened by enzyme-linked immunosorbent assay (WLISA) and subcloned by limiting dilution. The hybridoma clones which secreted antibodies highly reactive to the purified Vg were designated as 4D6. Its specificity was demonstrated by western blot from plasma of untreated, $E_2-treated$ male fish, and purified Vg.

범가자미, Verasper variegatus의 vitellogenin (Vg)을 분리하기 위하여 수컷에 $etradiol-17\beta(E_2) $를 처리하여 Vg의 합성을 유도하여 SDS-PAGE와 western blot으로 확인 하였다. 분리된 Vg의 분자량은 175 kD 이었으며 암컷 특이단백질이었다. $E_2$ 처리한 수컷 혈청을 찬 증류수로 침전시킨후 Sepharose CL-6B column chromatography에 의해 Vg을 분리하였다. 분리한 Vg에 대한 항혈청을 만들어 특이성을 western blot으로 확인하였고, 또한 Vg를 대한 단클론항체를 만들기 위하여 분리한 Vg을 Balb/c에 면역시켜 비장세포와 NS1 myeloma 세포를 세포융합하여 hybridoma를 만들었다. 세포융합된 18개 clone중 효소면역측정법에 의해 Vg과 가장 반응성이 높은 clone을 4D6으로 명명하였고, 이에 대한 특이성을 $E_2$가 처리되지 않은 수컷 혈청, $E_2$가 처리된 수컷혈청과 분리한 Vg를 사용하여 western blot으로 확인하였다.