Biomaterial Database

p53 is a mediator for radiation-repressed human TR2 orphan receptor expression in MCF-7 cells, a new pathway from tumor suppressor to member of the steroid receptor superfamily. 1996

D L Lin, and C Chang

Department of Medicine and University of Wisconsin Comprehensive Cancer Center, University of Wisconsin, Madison, 53792, USA.

p53 may function as a checkpoint by arresting the G1 cell cycle in response to DNA damage induced by radiation or other stimuli. We have found that the expression of the TR2 orphan receptor (TR2), a member of the steroid receptor superfamily, was down-regulated by ionizing irradiation. Our data shown in the present study demonstrate that irradiation can repress TR2 at both the translational and transcriptional levels. Transient transfection assays further link p53 to this repression by proving that endogenously induced or exogenously transfected p53 can repress TR2 gene expression, and this repression can be reversed by the co-transfection of SV40 large T antigen. Together, our data demonstrate for the first time that radiation and p53 can repress TR2, possibly providing a new pathway to link ionizing irradiation and p53 to members of the steroid receptor superfamily.

UI	MeSH Term	Description	Entries
D009687	Nuclear Proteins	Proteins found in the nucleus of a cell. Do not confuse with NUCLEOPROTEINS which are proteins conjugated with nucleic acids, that are not necessarily present in the nucleus.	Nucleolar Protein,Nucleolar Proteins,Nuclear Protein,Protein, Nuclear,Protein, Nucleolar,Proteins, Nuclear,Proteins, Nucleolar
D011987	Receptors, Steroid	Proteins found usually in the cytoplasm or nucleus that specifically bind steroid hormones and trigger changes influencing the behavior of cells. The steroid receptor-steroid hormone complex regulates the transcription of specific genes.	Corticosteroid Receptors,Receptors, Corticosteroid,Steroid Receptors,Corticosteroid Receptor,Receptors, Steroids,Steroid Receptor,Receptor, Corticosteroid,Receptor, Steroid,Steroids Receptors
D011988	Receptors, Thyroid Hormone	Specific high affinity binding proteins for THYROID HORMONES in target cells. They are usually found in the nucleus and regulate DNA transcription. These receptors are activated by hormones that leads to transcription, cell differentiation, and growth suppression. Thyroid hormone receptors are encoded by two genes (GENES, ERBA): erbA-alpha and erbA-beta for alpha and beta thyroid hormone receptors, respectively.	Diiodotyrosine Receptors,Receptors, Diiodotyrosine,Receptors, Thyroxine,Receptors, Triiodothyronine,T3 Receptors,T4 Receptors,Thyroid Hormone Receptors,Thyroxine Receptors,Triiodothyronine Receptors,DIT Receptors,Diiodotyrosine Receptor,MIT Receptors,Monoiodotyrosine Receptors,Receptors, DIT,Receptors, MIT,Receptors, Monoiodotyrosine,Receptors, T3,Receptors, T4,T3 Receptor,T4 Receptor,Thyroid Hormone Receptor,Thyroxine Receptor
D011994	Recombinant Proteins	Proteins prepared by recombinant DNA technology.	Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D001943	Breast Neoplasms	Tumors or cancer of the human BREAST.	Breast Cancer,Breast Tumors,Cancer of Breast,Breast Carcinoma,Cancer of the Breast,Human Mammary Carcinoma,Malignant Neoplasm of Breast,Malignant Tumor of Breast,Mammary Cancer,Mammary Carcinoma, Human,Mammary Neoplasm, Human,Mammary Neoplasms, Human,Neoplasms, Breast,Tumors, Breast,Breast Carcinomas,Breast Malignant Neoplasm,Breast Malignant Neoplasms,Breast Malignant Tumor,Breast Malignant Tumors,Breast Neoplasm,Breast Tumor,Cancer, Breast,Cancer, Mammary,Cancers, Mammary,Carcinoma, Breast,Carcinoma, Human Mammary,Carcinomas, Breast,Carcinomas, Human Mammary,Human Mammary Carcinomas,Human Mammary Neoplasm,Human Mammary Neoplasms,Mammary Cancers,Mammary Carcinomas, Human,Neoplasm, Breast,Neoplasm, Human Mammary,Neoplasms, Human Mammary,Tumor, Breast
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000952	Antigens, Polyomavirus Transforming	Polyomavirus antigens which cause infection and cellular transformation. The large T antigen is necessary for the initiation of viral DNA synthesis, repression of transcription of the early region and is responsible in conjunction with the middle T antigen for the transformation of primary cells. Small T antigen is necessary for the completion of the productive infection cycle.	Polyomavirus Large T Antigens,Polyomavirus Middle T Antigens,Polyomavirus Small T Antigens,Polyomavirus T Proteins,Polyomavirus Transforming Antigens,Polyomavirus Tumor Antigens,SV40 T Antigens,SV40 T Proteins,Simian Sarcoma Virus Proteins,Polyomaviruses Large T Proteins,Polyomaviruses Middle T Proteins,Polyomaviruses Small T Proteins,Antigens, Polyomavirus Tumor,Antigens, SV40 T,Proteins, Polyomavirus T,Proteins, SV40 T,T Antigens, SV40,T Proteins, Polyomavirus,T Proteins, SV40,Transforming Antigens, Polyomavirus,Tumor Antigens, Polyomavirus
D013539	Simian virus 40	A species of POLYOMAVIRUS originally isolated from Rhesus monkey kidney tissue. It produces malignancy in human and newborn hamster kidney cell cultures.	SV40 Virus,Vacuolating Agent,Polyomavirus macacae,SV 40 Virus,SV 40 Viruses,SV40 Viruses,Vacuolating Agents