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Tytuł oryginału: IGF-I: from diagnostic to triple-helix gene therapy of solid tumors.
Autorzy: Trojan Ladislas A., Kopiński Piotr, Wei Ming X., Ly Adama, Głogowska Aleksandra, Czarny Jolanta, Shevelev Aleksander, Przewłocki Ryszard, Henin Dominique, Trojan Jerzy
Źródło: Acta Bioch. Pol. 2002: 49 (4) s.979-990, il., bibliogr. s. 985-990
Sygnatura GBL: 303,116

Hasła klasyfikacyjne GBL:
  • genetyka
  • onkologia

    Typ dokumentu:
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie
  • zwierzęta

    Streszczenie angielskie: Alterations in the expression of growth factors and their receptors are associated with the growth and development of human tumors. One such growth factor is IGF-I (insulin-like growth factor I), a 70-amino-acid polypeptide expressed in many fissues, including brain. IGF-I is also expressed at high levels in some nervous system-derived tumors, especially in glioblastoma. When using IGF-I as a diagnostic marker, 17 different tumors are considered as expressing the IGF-I gene. Malignant glioma, the most common human brain cancer, is usually fatal. Average survival is less than one year. Our strategy of gene therapy for the treatment of gliomas adn other solid tumors is based on: 1) diagnostic using IGF-I gene expression as a differential marker, and 2) application of "triple-helix anti-IGF-I" therapy. In the latter approach, tumor cells are transfected wtih a vector, which encodes an oligoribonucleotide - an RNA styrand containing oligopurine sequence which might be capaable of forming a triple helix with an oligopurine and/or oligopyrimidine sequence of the promotor of IGF-I gene (RNA-IGF-I DNA triple helix). Human tumor cells trensfected in vito become down-regulated in the production of IGF-I and present immunogenic (MHC-I adn B7 expression) and apoptotic characteristics. Similar results were obtained when IGF-I antisense strategy was applied. In both strategies the transfected cells reimplanted in vivo lose tumorigenicity and elicit tumor specific immunity which leads to elimination of establaished tumors.

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