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Gefitinib Brands
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Genib 250mg
Healthcare Pharmaceuticals Ltd.
Tablet Tablet
Size: 30 | Price: 7500.00
Getinib 250mg
Drug International Ltd.
Tablet Tablet
Size: 28 | Price: 7000.00
Seberb 250mg
Genvio Pharma Ltd.
Tablet Tablet
Size: 30 | Price: 7500.00
Geficent 250mg
Incepta Pharmaceuticals Ltd.
Tablet Tablet
Size: 10 | Price: 1200.00
Gefinix 250mg
Beacon Pharmaceuticals Ltd.
Tablet Tablet
Size: 30 | Price: 7500.00

Gefitinib - Brands

Gefitinib is a kinase inhibitor. The epidermal growth factor receptor (EGFR) is expressed on the cell surface of both normal and cancer cells and plays a role in the processes of cell growth and proliferation. Some EGFR activating mutations (exon 19 deletions or exon 21 point mutation L858R) within non-small cell lung cancer (NSCLC) cells have been identified as contributing to the promotion of tumor cell growth, blocking of apoptosis, increasing the production of angiogenic factors and facilitating the processes of metastasis.

Gefitinib reversibly inhibits the kinase activity of wild-type and certain activating mutations of EGFR, preventing autophosphorylation of tyrosine residues associated with the receptor, thereby inhibiting further downstream signalling and blocking EGFR-dependent proliferation. 

Gefitinib binding affinity for EGFR exon 19 deletion or exon 21 point mutation L858R mutations is higher than its affinity for the wild-type EGFR. Gefitinib also inhibits IGF and PDGF-mediated signalling at clinically relevant concentrations; inhibition of other tyrosine kinase receptors has not been fully characterized.

Pharmacology

Gefitinib inhibits the epidermal growth factor receptor (EGFR) tyrosine kinase by binding to the adenosine triphosphate (ATP)-binding site of the enzyme. Thus the function of the EGFR tyrosine kinase in activating the Ras signal transduction cascade is inhibited; and malignant cells are inhibited. Gefitinib is the first selective inhibitor of the EGFR tyrosine kinase which is also referred to as Her1 or ErbB-1. EGFR is overexpressed in the cells of certain types of human carcinomas - for example in lung and breast cancers. Overexpression leads to inappropriate activation of the apoptotic Ras signal transduction cascade, eventually leading to uncontrolled cell proliferation.


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