Biomaterial Database

Resistance to apoptosis of harringtonine-resistant HL60 cells induced by tetrandrine. 1996

Q Y He, and H Q Zhang, and D B Pang, and X S Chi, and S B Xue

Department of Biology, Beijing Normal University, China.

OBJECTIVE To study the mechanism of resistance to apoptosis in the harringtonine (Har)-resistant HL60 cells with tetrandrine (Tet). METHODS Growth inhibition, flow cytometry, DNA agarose gel electrophoresis, protein phosphorylation, and RNA dot hybridization. RESULTS The resistant cells had no cross resistance to Tet. Tet induced the sensitive but not the Har-resistant HL60 cells to apoptosis. The high phosphorylation of protein < 30 kDa occurred when the resistant cells were treated with Tet. Tet and Har increased the expression of c-myc mRNA in the sensitive HL60 cells. The expression of c-myc mRNA in the resistant cells was obviously decreased and almost not changed in treatment with Tet and Har. CONCLUSIONS Tet induced the sensitive but not the Har-resistant HL60 cells to apoptosis, and the resistance to apoptosis induced by Tet was associated with the high protein phosphorylation and reduction of the expression of c-myc mRNA.

UI	MeSH Term	Description	Entries
D006248	Harringtonines	Tetracyclic spiro-BENZAZEPINES isolated from the seeds of CEPHALOTAXUS. They are esters of the alkaloid cephalotaxine and may be effective as antineoplastic agents.	Cephalotaxine Alkaloids,Cephalotaxus Alkaloids,Alkaloids, Cephalotaxine,Alkaloids, Cephalotaxus
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000470	Alkaloids	Organic nitrogenous bases. Many alkaloids of medical importance occur in the animal and vegetable kingdoms, and some have been synthesized. (Grant & Hackh's Chemical Dictionary, 5th ed)	Alkaloid,Plant Alkaloid,Plant Alkaloids,Alkaloid, Plant,Alkaloids, Plant
D000972	Antineoplastic Agents, Phytogenic	Agents obtained from higher plants that have demonstrable cytostatic or antineoplastic activity.	Antineoplastics, Botanical,Antineoplastics, Phytogenic,Agents, Phytogenic Antineoplastic,Botanical Antineoplastics,Phytogenic Antineoplastic Agents,Phytogenic Antineoplastics
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
D016259	Genes, myc	Family of retrovirus-associated DNA sequences (myc) originally isolated from an avian myelocytomatosis virus. The proto-oncogene myc (c-myc) codes for a nuclear protein which is involved in nucleic acid metabolism and in mediating the cellular response to growth factors. Truncation of the first exon, which appears to regulate c-myc expression, is crucial for tumorigenicity. The human c-myc gene is located at 8q24 on the long arm of chromosome 8.	L-myc Genes,N-myc Genes,c-myc Genes,myc Genes,v-myc Genes,L-myc Proto-Oncogenes,N-myc Proto-Oncogenes,c-myc Proto-Oncogenes,myc Oncogene,v-myc Oncogenes,Gene, L-myc,Gene, N-myc,Gene, c-myc,Gene, myc,Gene, v-myc,Genes, L-myc,Genes, N-myc,Genes, c-myc,Genes, v-myc,L myc Genes,L myc Proto Oncogenes,L-myc Gene,L-myc Proto-Oncogene,N myc Genes,N myc Proto Oncogenes,N-myc Gene,N-myc Proto-Oncogene,Oncogene, myc,Oncogene, v-myc,Oncogenes, myc,Oncogenes, v-myc,Proto-Oncogene, L-myc,Proto-Oncogene, N-myc,Proto-Oncogene, c-myc,Proto-Oncogenes, L-myc,Proto-Oncogenes, N-myc,Proto-Oncogenes, c-myc,c myc Genes,c myc Proto Oncogenes,c-myc Gene,c-myc Proto-Oncogene,myc Gene,myc Oncogenes,v myc Genes,v myc Oncogenes,v-myc Gene,v-myc Oncogene
D016271	Proto-Oncogene Proteins c-myc	Basic helix-loop-helix transcription factors encoded by the c-myc genes. They are normally involved in nucleic acid metabolism and in mediating the cellular response to growth factors. Elevated and deregulated (constitutive) expression of c-myc proteins can cause tumorigenesis.	L-myc Proteins,N-myc Proteins,c-myc Proteins,myc Proto-Oncogene Proteins,p62(c-myc),Proto-Oncogene Products c-myc,Proto-Oncogene Proteins myc,myc Proto-Oncogene Product p62,p62 c-myc,L myc Proteins,N myc Proteins,Proteins myc, Proto-Oncogene,Proto Oncogene Products c myc,Proto Oncogene Proteins c myc,Proto Oncogene Proteins myc,Proto-Oncogene Proteins, myc,c myc Proteins,myc Proto Oncogene Product p62,myc Proto Oncogene Proteins,myc, Proto-Oncogene Proteins,p62 c myc
D017209	Apoptosis	A regulated cell death mechanism characterized by distinctive morphologic changes in the nucleus and cytoplasm, including the endonucleolytic cleavage of genomic DNA, at regularly spaced, internucleosomal sites, i.e., DNA FRAGMENTATION. It is genetically programmed and serves as a balance to mitosis in regulating the size of animal tissues and in mediating pathologic processes associated with tumor growth.	Apoptosis, Extrinsic Pathway,Apoptosis, Intrinsic Pathway,Caspase-Dependent Apoptosis,Classic Apoptosis,Classical Apoptosis,Programmed Cell Death,Programmed Cell Death, Type I,Apoptoses, Extrinsic Pathway,Apoptoses, Intrinsic Pathway,Apoptosis, Caspase-Dependent,Apoptosis, Classic,Apoptosis, Classical,Caspase Dependent Apoptosis,Cell Death, Programmed,Classic Apoptoses,Extrinsic Pathway Apoptoses,Extrinsic Pathway Apoptosis,Intrinsic Pathway Apoptoses,Intrinsic Pathway Apoptosis
D044182	Benzylisoquinolines	ISOQUINOLINES with a benzyl substituent.	Benzyl-Isoquinoline,Benzylisoquinoline,Bis-Benzyl-Isoquinoline,Bis-Benzylisoquinoline,Bisbenzylisoquinoline,Bisbenzylisoquinolines,Benzyl-Isoquinolines,Bis-Benzyl-Isoquinolines,Bis-Benzylisoquinolines,Benzyl Isoquinoline,Benzyl Isoquinolines,Bis Benzyl Isoquinoline,Bis Benzyl Isoquinolines,Bis Benzylisoquinoline,Bis Benzylisoquinolines
D018922	HL-60 Cells	A promyelocytic cell line derived from a patient with ACUTE PROMYELOCYTIC LEUKEMIA. HL-60 cells lack specific markers for LYMPHOID CELLS but express surface receptors for FC FRAGMENTS and COMPLEMENT SYSTEM PROTEINS. They also exhibit phagocytic activity and responsiveness to chemotactic stimuli. (From Hay et al., American Type Culture Collection, 7th ed, pp127-8)	HL60 Cells,Cell, HL60,Cells, HL60,HL 60 Cells,HL-60 Cell,HL60 Cell