Abstract：
:Most patients with lung cancer still die from their disease, necessitating additional options to improve treatment. Here, we provide evidence for targeting CD22, a cell adhesion protein known to influence B-cell survival that we found is also widely expressed in lung cancer cells. In characterizing the antitumor activity of an established anti-CD22 monoclonal antibody (mAb), HB22.7, we showed CD22 expression by multiple approaches in various lung cancer subtypes, including 7 of 8 cell lines and a panel of primary patient specimens. HB22.7 displayed in vitro and in vivo cytotoxicity against CD22-positive human lung cancer cells and tumor xenografts. In a model of metastatic lung cancer, HB22.7 inhibited the development of pulmonary metastasis and extended overall survival. The finding that CD22 is expressed on lung cancer cells is significant in revealing a heretofore unknown mechanism of tumorigenesis and metastasis. Our work suggests that anti-CD22 mAbs may be useful for targeted therapy of lung cancer, a malignancy that has few tumor-specific targets.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Tuscano JM,Kato J,Pearson D,Xiong C,Newell L,Ma Y,Gandara DR,O'Donnell RTdoi
10.1158/0008-5472.CAN-12-0173subject
Has Abstractpub_date
2012-11-01 00:00:00pages
5556-65issue
21eissn
0008-5472issn
1538-7445pii
0008-5472.CAN-12-0173journal_volume
72pub_type
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