Biomaterial Database

[Vincristine-resistant human KB cell line and mechanism of multidrug resistance]. 1994

X H Zhang, and F Y Zhang, and X J Ji, and Z Y Li

Institute of Materia, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing.

A multidrug-resistant (mdr) clone of human cancer KB cells was isolated by stepwise selection on exposure to increasing doses of vincristine. The final clone, KBv200, obtained after ethylmethane sulfonate (EMS) mutagenesis showed 175-fold higher resistance to vincristine than did KB cells. The cells were also cross-resistant to taxol, colchicine and adriamycin. Cellular accumulation of vincristine in KBv200 was decreased to less than one-fifth of that in KB. To determine the presence of mdr 1 mRNA in KBv200 and KB, total cellular RNAs from each cell line were analyzed by means of slot blot hybridization. The result showed that the mdr 1 gene had been highly expressed in KBv200. In addition, verapamil, a calcium channel blockers, was shown to increase VCR accumulation in KBv200 and reverse the vincristine resistance. All these results demonstrate that the mechanism of KBv200 cell resistance to multiple drugs resulted from increased expression of mdr 1 gene and brought about over production of P-glycoprotein and increased the efflux of drugs.

UI	MeSH Term	Description	Entries
D007624	KB Cells	This line KB is now known to be a subline of the ubiquitous KERATIN-forming tumor cell line HeLa. It was originally thought to be derived from an epidermal carcinoma of the mouth, but was subsequently found, based on isoenzyme analysis, HeLa marker chromosomes, and DNA fingerprinting, to have been established via contamination by HELA CELLS. The cells are positive for keratin by immunoperoxidase staining. KB cells have been reported to contain human papillomavirus18 (HPV-18) sequences.	HeLa-KB Cells,Cell, HeLa-KB,Cell, KB,Cells, HeLa-KB,Cells, KB,HeLa KB Cells,HeLa-KB Cell,KB Cell
D009363	Neoplasm Proteins	Proteins whose abnormal expression (gain or loss) are associated with the development, growth, or progression of NEOPLASMS. Some neoplasm proteins are tumor antigens (ANTIGENS, NEOPLASM), i.e. they induce an immune reaction to their tumor. Many neoplasm proteins have been characterized and are used as tumor markers (BIOMARKERS, TUMOR) when they are detectable in cells and body fluids as monitors for the presence or growth of tumors. Abnormal expression of ONCOGENE PROTEINS is involved in neoplastic transformation, whereas the loss of expression of TUMOR SUPPRESSOR PROTEINS is involved with the loss of growth control and progression of the neoplasm.	Proteins, Neoplasm
D004351	Drug Resistance	Diminished or failed response of an organism, disease or tissue to the intended effectiveness of a chemical or drug. It should be differentiated from DRUG TOLERANCE which is the progressive diminution of the susceptibility of a human or animal to the effects of a drug, as a result of continued administration.	Resistance, Drug
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012333	RNA, Messenger	RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.	Messenger RNA,Messenger RNA, Polyadenylated,Poly(A) Tail,Poly(A)+ RNA,Poly(A)+ mRNA,RNA, Messenger, Polyadenylated,RNA, Polyadenylated,mRNA,mRNA, Non-Polyadenylated,mRNA, Polyadenylated,Non-Polyadenylated mRNA,Poly(A) RNA,Polyadenylated mRNA,Non Polyadenylated mRNA,Polyadenylated Messenger RNA,Polyadenylated RNA,RNA, Polyadenylated Messenger,mRNA, Non Polyadenylated
D014700	Verapamil	A calcium channel blocker that is a class IV anti-arrhythmia agent.	Iproveratril,Calan,Cordilox,Dexverapamil,Falicard,Finoptin,Isoptin,Isoptine,Izoptin,Lekoptin,Verapamil Hydrochloride,Hydrochloride, Verapamil
D014750	Vincristine	An antitumor alkaloid isolated from VINCA ROSEA. (Merck, 11th ed.)	Leurocristine,Citomid,Farmistin,Oncovin,Oncovine,Onkocristin,Vincasar,Vincasar PFS,Vincristin Bristol,Vincristin medac,Vincristine Sulfate,Vincrisul,Vintec,cellcristin,PFS, Vincasar,Sulfate, Vincristine
D015870	Gene Expression	The phenotypic manifestation of a gene or genes by the processes of GENETIC TRANSCRIPTION and GENETIC TRANSLATION.	Expression, Gene,Expressions, Gene,Gene Expressions
D018432	Drug Resistance, Multiple	Simultaneous resistance to several structurally and functionally distinct drugs.	Drug Resistance, Extensively,Extensively Drug Resistance,Extensively-Drug Resistance,Multidrug Resistance,Multi-Drug Resistance,Extensively Drug Resistances,Extensively-Drug Resistances,Multiple Drug Resistance,Resistance, Extensively Drug,Resistance, Extensively-Drug,Resistance, Multiple Drug
D020168	ATP Binding Cassette Transporter, Subfamily B, Member 1	A 170-kDa transmembrane glycoprotein from the superfamily of ATP-BINDING CASSETTE TRANSPORTERS. It serves as an ATP-dependent efflux pump for a variety of chemicals, including many ANTINEOPLASTIC AGENTS. Overexpression of this glycoprotein is associated with multidrug resistance (see DRUG RESISTANCE, MULTIPLE).	ATP-Dependent Translocase ABCB1,MDR1 Protein,MDR1B Protein,Multidrug Resistance Protein 1,P-Glycoprotein,P-Glycoprotein 1,ABCB1 Protein,ATP Binding Cassette Transporter, Sub-Family B, Member 1,ATP-Binding Cassette, Sub-Family B, Member 1,CD243 Antigen,PGY-1 Protein,1, P-Glycoprotein,ABCB1, ATP-Dependent Translocase,ATP Dependent Translocase ABCB1,Antigen, CD243,P Glycoprotein,P Glycoprotein 1,PGY 1 Protein,Protein, MDR1B,Translocase ABCB1, ATP-Dependent