兔抗B16黑素细胞多克隆抗体的制备及对黑素细胞增殖的影响

Preparation of polyclonal antibodies of rabbit-anti-B16 melanocyte and the effect on melanocyte proliferation

目的:制备兔抗B16黑素细胞多克隆抗体,研究其对黑素细胞增殖的影响。方法:①用B16黑素细胞颗粒抗原免疫家兔得到兔抗B16黑素细胞多克隆抗体;试管凝集法检测抗血清效价;G蛋白亲和层析纯化抗血清;②SDS-PAGE检测纯化抗体分子量大小;MTT法检测纯化抗体IgG对B16黑素细胞增殖的影响。结果:兔抗B16黑素细胞抗血清效价高达1:1280;亲和层析纯化抗血清获得的免疫球蛋白IgG,经SDS-PAGE电泳显示重链分子量大小约为66.2kD;MTT比色法显示IgG对黑素细胞增殖有抑制作用,与非IgG和未纯化血清差异显著。结论:成功制备并鉴定了高效价的兔抗B16黑素细胞多克隆抗体,纯化后所获得的高纯度IgG,对B16黑素细胞增殖具有抑制作用,为进一步研究此抗体对黑素细胞生长及色素代谢的影响,以及色素减退性疾病白癜风的发病机制奠定了基础。

Objective：To generate rabbit-anti B16 melanocyte polyclonal antibodies and study the effect on melanocyte proliferation.Methods：Rabbits was immunized with B16 melanocytes to produce rabbit anti-B16 melanocyte polyclonal antibody（pAb）.The titer of the antiserum was then detected using the tube agglutination assay;The antiserum was purified through the G protein affinity chromatograph,and the molecular weight of the purified Ab was identifed through SDS-PAGE.The effect of purified IgG on B16 melanocytes proliferation was detected using MTT assay.Results：The titer of the antiserum reaches 1∶1 280;SDS-PAGE shows that the heavy chain molecular weight of the purified IgG is 66.2 kD;MTT assay shows that the IgG fraction inhibited the proliferation of B16 melanocytes with signifancent difference when compared to none IgG or no purified antiserum.Conclusion：The rabbit anti-B16 melanocytes pAb with high titer is preparated successfully.The purified IgG can inhibit proliferation of B16 melanocytes.It could be useful in studying the effect of this antibody on melanocyte growth and pigment metabolism,it also be useful in studying the pathogenesis of vitiligo.