Myc
Myc (c-Myc) je regulatorni gen koji kodira transkripcioni faktor.
Mutirane verzije Myc gena su nađene u mnoštvu tipova kancera. One uzrokuju konstitutivnu (perzistentnu) ekspresiju gena. To dovodi do umanjenog izražavanja mnoštva gena, neki od kojih učestvuju u ćelijskoj proliferaciji, i time se formira kancer. Česta translokacija koja obuhvata Myc je t(8;14). Ona je kritična za razvoj u mnogim slučajevima Burkitovog limfoma. Nedavna istraživanja demonstriraju da privremena inhibicija Myc faktora selektivno ubija ćelije kancera pluća kod miševa, te je stoga ovaj protein potencijalni cilj za lekove protiv kancera.[1]
U humanom genomu, Myc je lociran na hromozomu 8 i smatra se da reguliše izražavanje 15% svih gena[2] putem vezivanja za sekvencu pojačivačke kutije (E-kutija) i regrutovanja histonske acetiltransferaze (HAT). To znači da osim njegove uloge klasičnog transkripcionog faktora, Myc takođe deluje kao globalni regulator hromatinske strukture putem regulacije histonske acetilacije u regionima bogatim genima, kao i na mestima udaljenim od poznatih gena.[3]
Reference
[уреди | уреди извор]- ^ Soucek L, Whitfield J, Martins CP, Finch AJ, Murphy DJ, Sodir NM, Karnezis AN, Swigart LB, Nasi S, Evan GI (2008). „Modelling Myc inhibition as a cancer therapy”. Nature. 455 (7213): 679—83. PMID 18716624. doi:10.1038/nature07260.
- ^ Gearhart J, Pashos EE, Prasad MK, Pluripotency Redeux -- advances in stem-cell research, N Engl J Med 357(15):1469 Free full text Архивирано на сајту Wayback Machine (19. октобар 2008)
- ^ Cotterman R, Jin VX, Krig SR, Lemen JM, Wey A, Farnham PJ, Knoepfler PS (2008). „N-Myc regulates a widespread euchromatic program in the human genome partially independent of its role as a classical transcription factor”. Cancer Res. 68 (23): 9654—62. PMC 2637654 . PMID 19047142. doi:10.1158/0008-5472.CAN-08-1961.
Literatura
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