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Published:
Mar 14, 2019Keywords:
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Main Article Content
Gene expression of multidrug-resistant ATP-binding cassette transporter (MDR1/ABCB1) in bovine mastitis
Abstract
Methods: Mastitic and normal mammary gland samples were collected after clinical examination and confirmed using field California mastitis test. Total RNA was extracted followed by cDNA synthesis and real-time PCR to detect the expression pattern of P-gp. Tissue sections were examined for pathological changes and immune reactivity to the apoptotic regulator, Bcl-2-associated X protein (BAX).
Results: Stained sections from mastitic samples showed congestion, infiltration of inflammatory cells and hemorrhage. Using immunohistochemistry, it was shown that mastitis is associated with overexpression of the apoptosis regulator, Bcl-2-associated X protein (BAX). There was increased expression of the pro-apoptotic factor, Bax, in mastitic alveolar lining and lactic tubules compared with normal mammary gland tissues. Using real-time PCR, the expression level of MDR1/ABCB1 was determined to be 2.6-fold higher in mastitic tissues than in normal mammary tissues.
Conclusion: Higher MDR1/P-gp level can modulate drug interventions by preventing intracellular accumulation of chemotherapeutics or anti-inflammatories via continuous efflux or export to extracellular fluids.
Keywords: ABC transporter, P-glycoprotein, Drug exporters, Mastitis, Mammary gland
