High Expression of Multidrug Resistance Gene-1 Can Aggravate Resistance to Methotrexate in Rheumatoid Arthritis Patients.
10.3881/j.issn.1000-503X.10927
- Author:
Jia WANG
1
;
Ni MAO
1
;
Xi XIE
1
;
Shu LI
1
;
Wei Jin CHEN
1
Author Information
1. Department of Rheumatology and Immunology,Second Xiangya Hospital,Central South University,Changsha 410011,China.
- Publication Type:Journal Article
- Keywords:
P-glycoprotein;
drug resistance;
multidrug resistance gene-1;
rheumatoid arthritis
- MeSH:
ATP Binding Cassette Transporter, Subfamily B;
genetics;
Arthritis, Rheumatoid;
drug therapy;
genetics;
Cells, Cultured;
Drug Resistance;
Fibroblasts;
drug effects;
Humans;
Methotrexate;
pharmacology;
Synovial Membrane;
cytology
- From:
Acta Academiae Medicinae Sinicae
2019;41(5):595-600
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the role of multidrug resistance gene-1(MDR1)gene in methotrexate(MTX)resistance in patients with rheumatoid arthritis(RA).Methods Fibroblast-like synoviocytes(FLS)from RA patients were infected with recombinant adenovirus Ad-EGFP-MDR1 to obtain MDR1 over-expressed RA FLS.The transcription level of MDR1 gene and the expression level of its coding product P-glycoprotein(P-gp) rotein were detected by real-time PCR and Western blot analysis.The efflux function was verified by rhodamine 123 efflux assay.The resistance to MTX was detected by MTT assay.Results RA FLS were infected with recombinant adenovirus Ad-EGFP-MDR1;72 hours later,the particles size in MDR1 over-expressed RA FLS increased,the cell volume became larger,and the growth rate decreased.The transcription level of MDR1(1.4325±0.3924 0.0650±0.0070;=6.035,=0.004),the expression level of P-gp protein(1.8667±0.2857 0.9367±0.0551;=5.536,=0.005),and the ability of extracellular rhodamine 123(979.43±196.81 1680.06±147.04;=-4.940,=0.008) in MDR1 over-expressed RA FLS were significantly higher than those of negative virus control RA-FLS,and the survival rate of MDR1 over-expressed RA FLS was significantly increased at each concentration of MTX(<0.05).Conclusion The high expression of MDR1 can affect the efflux ability to MTX by up-regulating the expression of P-gp,thus enhancing the drug resistance to MTX in RA FLS.
