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CD22

CD22:B細(xì)胞受體輔因子

CD22,又被稱為Siglec-2,普遍存在于正常B細(xì)胞和B細(xì)胞惡性腫瘤中。CD22主要表達(dá)于成熟B細(xì)胞,是具有調(diào)控B細(xì)胞激活作用的細(xì)胞表面粘附分子,有助于B細(xì)胞對抗原反應(yīng)敏感性的控制。此外,有研究進(jìn)一步證明了CD22表達(dá)在B細(xì)胞中具有特異性,并且在小鼠和人類中都受到發(fā)育調(diào)控。CD22作為B細(xì)胞受體(BCR)的一個(gè)共受體,通過抗原引起CD22與BCR交聯(lián),觸發(fā)CD22磷酸化,使下游信號蛋白去磷酸化和失活,從而抑制BCR信號傳導(dǎo),防止自身免疫性疾病的發(fā)生。意味著,CD22表達(dá)或功能受損在自身免疫性疾病的發(fā)病機(jī)制中起重要作用,如系統(tǒng)性紅斑狼瘡(SLE)、類風(fēng)濕性關(guān)節(jié)炎(RA)等。因此,作為限制B細(xì)胞的抗原,CD22為治療自身免疫疾病和血液癌癥中的B細(xì)胞失調(diào)提供了有效靶點(diǎn)。

Recombinant Human CD22 活性蛋白實(shí)驗(yàn)驗(yàn)證數(shù)據(jù)

High Purity Validated by SDS-PAGE

(Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.

Excellent Bioactivity Validated by Functional ELISA

Measured by its binding ability in a functional ELISA. Immobilized CD22 at 2 μg/ml can bind Anti-CD22 rabbit monoclonal antibody, the EC50 of human CD22 protein is 4.034-4.800 ng/ml.

CD22 Antibodies

CD22 for Homo sapiens (Human)

CD22 Proteins

CD22 Proteins for Homo sapiens (Human)

CD22 Proteins for Mus musculus (Mouse)

CD22 Proteins for Gorilla gorilla gorilla (Lowland gorilla)

CD22 Proteins for Pongo pygmaeus (Bornean orangutan)

CD22 Proteins for Pan troglodytes (Chimpanzee)

CD22 Proteins for Pan paniscus (Pygmy chimpanzee) (Bonobo)