Biomaterial Database

Expression of growth hormone receptor in human liposarcomas and lipomas. 2000

L Temmim, and S Kölle, and H Baker, and F Sinowatz

Kuwait Cancer Control Centre, Kuwait.

Our immunohistochemical results clearly demonstrated the occurrence of growth hormone receptors (GH-R) in the tumour cells of lipomas and liposarcomas. In liposarcomas staining intensity in the cytoplasm of tumour cells varied between weak and distinct but could not be correlated to the histological grade of the malignant tumours. These findings were corroborated to some extent by the RT-PCR results. RT-PCR analysis of human lipomas and liposarcomas revealed the amplified cDNA fragment of GH-R in 8 out of 12 lipomas but only in 3 out of 10 liposarcomas. The reduced number of GH-R positive tumours found with PCR may be explained by the extraction method of RNA from paraffin sections. An interesting finding was the distinct immunoreactivity of the endothelium of blood vessels in liposarcomas, which was especially pronounced in the newly forming capillaries. This points to an important role of GH-R in tumour angiogenesis which could significantly contribute to tumour growth in liposarcomas and may open the possibility for therapeutic intervention using antiangiogenic substances.

UI	MeSH Term	Description	Entries
D007150	Immunohistochemistry	Histochemical localization of immunoreactive substances using labeled antibodies as reagents.	Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D008067	Lipoma	A benign tumor composed of fat cells (ADIPOCYTES). It can be surrounded by a thin layer of connective tissue (encapsulated), or diffuse without the capsule.	Fatty Tumor,Hibernoma,Lipoma, Pleomorphic,Atypical Lipoma,Lipomata,Lipomatosis, Multiple,Atypical Lipomas,Fatty Tumors,Hibernomas,Lipoma, Atypical,Lipomas,Lipomas, Atypical,Lipomas, Pleomorphic,Lipomatas,Lipomatoses, Multiple,Multiple Lipomatoses,Multiple Lipomatosis,Pleomorphic Lipoma,Pleomorphic Lipomas,Tumor, Fatty,Tumors, Fatty
D008080	Liposarcoma	A malignant tumor derived from primitive or embryonal lipoblastic cells. It may be composed of well-differentiated fat cells or may be dedifferentiated: myxoid (LIPOSARCOMA, MYXOID), round-celled, or pleomorphic, usually in association with a rich network of capillaries. Recurrences are common and dedifferentiated liposarcomas metastasize to the lungs or serosal surfaces. (From Dorland, 27th ed; Stedman, 25th ed)	Liposarcoma, Dedifferentiated,Liposarcoma, Pleomorphic,Atypical Lipomatous Tumor,Liposarcoma, Well Differentiated,Well Differentiated Liposarcoma,Atypical Lipomatous Tumors,Dedifferentiated Liposarcoma,Dedifferentiated Liposarcomas,Lipomatous Tumor, Atypical,Liposarcomas,Pleomorphic Liposarcoma,Pleomorphic Liposarcomas,Well Differentiated Liposarcomas
D011986	Receptors, Somatotropin	Cell surface proteins that bind GROWTH HORMONE with high affinity and trigger intracellular changes influencing the behavior of cells. Activation of growth hormone receptors regulates amino acid transport through cell membranes, RNA translation to protein, DNA transcription, and protein and amino acid catabolism in many cell types. Many of these effects are mediated indirectly through stimulation of the release of somatomedins.	Growth Hormone Receptors,Receptors, Growth Hormone,Somatomammotropin Receptors,Somatotropin Receptors,Growth Hormone Receptor,Receptor, Growth Hormone,Receptors, Somatomammotropin,Somatomammotropin Receptor,Somatotropin Receptor,Hormone Receptor, Growth,Hormone Receptors, Growth
D004730	Endothelium, Vascular	Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components.	Capillary Endothelium,Vascular Endothelium,Capillary Endotheliums,Endothelium, Capillary,Endotheliums, Capillary,Endotheliums, Vascular,Vascular Endotheliums
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D020133	Reverse Transcriptase Polymerase Chain Reaction	A variation of the PCR technique in which cDNA is made from RNA via reverse transcription. The resultant cDNA is then amplified using standard PCR protocols.	Polymerase Chain Reaction, Reverse Transcriptase,Reverse Transcriptase PCR,PCR, Reverse Transcriptase,Transcriptase PCR, Reverse