Biomaterial Database

Selective loss of the expression of OKT-4 or Leu-3A defined antigen by 12-0-tetradecanoylphorbol-13-acetate (TPA) in human lymphoid cells. 1984

E Tatsumi, and C Piontek, and T Sugimoto, and K Minato, and J Minowada

In ten human malignant T-cell lines (HPB-ALL, HPB-MLT, CCRF-CEM, RPMI-8402, MOLT-4, JM, P12/Ichikawa, TALL-1, SKW-3, HUT-102), the expression of the antigen defined by OKT-4 or Leu-3A monoclonal antibody was remarkably decreased after a short incubation (1 hr) with 12-0-tetradecanoylphorbol-13-acetate (TPA) (1.6 nM). This phenomenon was also observed in all types of cells tested, including two lymphoblastoid cell lines with B-cell properties (RPMI-6410 and RPMI-8392), thymus cells from three children, peripheral blood lymphocytes from four normal individuals, and fresh neoplastic T cells from a case of T-cell acute lymphoblastic leukemia (ALL) and a case of T-cell lymphoma. The presence of puromycin (10 microM), cycloheximide (35 microM), or retinoic acid (1.0 microM) had no effect on the TPA-induced loss of OKT-4 defined antigen. Incubation at 4 degrees C or with lidocaine (4 mM) partially prevented this effect of TPA, and the presence of sodium azide (150 mM) did so totally. Recovery of antigen expression occurred 24 hours after cessation of TPA treatment. Comparative study using several phorbols other than TPA showed that this effect accorded with the tumor promotor activity of the compounds, but the phenomenon appears to be at the membrane level, not necessarily as a result of TPA-induced cellular differentiation.

UI	MeSH Term	Description	Entries
D008221	Lymphoid Tissue	Specialized tissues that are components of the lymphatic system. They provide fixed locations within the body where a variety of LYMPHOCYTES can form, mature and multiply. The lymphoid tissues are connected by a network of LYMPHATIC VESSELS.	Lymphatic Tissue,Lymphatic Tissues,Lymphoid Tissues,Tissue, Lymphatic,Tissue, Lymphoid,Tissues, Lymphatic,Tissues, Lymphoid
D010704	Phorbols	The parent alcohol of the tumor promoting compounds from CROTON OIL (Croton tiglium).	Tigliane,Tiglianes
D002417	Cattle	Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.	Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000911	Antibodies, Monoclonal	Antibodies produced by a single clone of cells.	Monoclonal Antibodies,Monoclonal Antibody,Antibody, Monoclonal
D000951	Antigens, Neoplasm	Proteins, glycoprotein, or lipoprotein moieties on surfaces of tumor cells that are usually identified by monoclonal antibodies. Many of these are of either embryonic or viral origin.	Neoplasm Antigens,Tumor Antigen,Tumor Antigens,Antigen, Tumor,Antigens, Tumor
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures
D013755	Tetradecanoylphorbol Acetate	A phorbol ester found in CROTON OIL with very effective tumor promoting activity. It stimulates the synthesis of both DNA and RNA.	Phorbol Myristate Acetate,12-Myristoyl-13-acetylphorbol,12-O-Tetradecanoyl Phorbol 13-Acetate,Tetradecanoylphorbol Acetate, 4a alpha-Isomer,12 Myristoyl 13 acetylphorbol,12 O Tetradecanoyl Phorbol 13 Acetate,13-Acetate, 12-O-Tetradecanoyl Phorbol,Acetate, Phorbol Myristate,Acetate, Tetradecanoylphorbol,Myristate Acetate, Phorbol,Phorbol 13-Acetate, 12-O-Tetradecanoyl,Tetradecanoylphorbol Acetate, 4a alpha Isomer