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Molecular characteristics of two lung carcinoma cell-line associated membrane antigens
Abstract:
The molecular characteristics of the antigens detected by the moab BW 181/26 and BW 166/6 are described. The 55 KD molecule defined by BW 181/26 is strongly attached to the plasma membrane and is not secreted, whereas the 140 KD (96 KD) and 120 KD (61 KD) molecules recognized by BW 166/6 are loosely associated to the cell membrane and secreted into the tissue culture medium. The last two antigens might be used as markers for the early detection of certain lung carcinomas, whereas the 55 KD membrane associated antigen could be a target for immunotoxins used in immunotherapy of cancer.
Insights
Monoclonal antibodies BW 181/26 and BW 166/6 identify distinct antigens. The 55 KD antigen is membrane-bound, while 140 KD and 120 KD antigens are secreted, potentially serving as lung cancer biomarkers.
Area of Science:
- Immunology
- Oncology
- Biochemistry
Background:
- Monoclonal antibodies (mAbs) are crucial tools in cancer research.
- Identifying specific tumor-associated antigens can lead to diagnostic and therapeutic advancements.
Purpose of the Study:
- To characterize the molecular properties of antigens recognized by mAbs BW 181/26 and BW 166/6.
- To evaluate the potential of these antigens as biomarkers for lung carcinoma and targets for cancer immunotherapy.
Main Methods:
- Characterization of antigen molecular weight and cellular localization.
- Assessment of antigen secretion and membrane association.
Main Results:
- The mAb BW 181/26 detects a 55 KD membrane-associated antigen, not secreted.
- The mAb BW 166/6 recognizes 140 KD (96 KD) and 120 KD (61 KD) antigens, which are loosely cell-associated and secreted.
Conclusions:
- The secreted antigens identified by BW 166/6 may serve as early detection markers for lung carcinomas.
- The membrane-bound 55 KD antigen detected by BW 181/26 is a potential target for antibody-based cancer immunotherapy.