HtrA1 Geni ve İşlevleri

Yıl 2015, Cilt: 12 Sayı: 1, 165 - 172, 15.04.2015

Feridun Akkafa

Öz

HtrA (High temprature requirement A) gen ailesi gelişme ile ilgili olup, yüksek seviyedeki ifadeleri
organizmanın canlılığının ve gelişmesinin muhafaza edilmesinde önemli bir role sahiptir. HtrA1 geni; bu gen
ailesine ait olup, serin proteaz işlevi olan HtrA1 proteinini kodlar. HtrA serin proteazlar, kemoterapotik
hücre toksisitesini sağlaması yönünden, günümüzde kanser tedavisinde potansiyel hedef olarak
düşünülmektedir. Çeşitli kanserlerde HtrA1 ekspresyon seviyesinin azaldığı ve yüksek seviyede
ekspresyonunun ise in vitro ve in vivo tümör büyümesini engellediği bugüne kadar yapılan birçok çalışma ile
ortaya konmuştur. Ayrıca HtrA1'in çeşitli hastalıklar için yeni bir tedavi hedefi olabileceği de ileri
sürülmektedir. Özellikle katı tümörlerin tedavisinde antitümör ajan olarak yaygın bir şekilde kullanılan
cisplatin ve paclitaxel ile HtrA1 ekspresyon seviyesinin arttığı gözlenmiştir. Günümüze kadar HtrA gen
ailesinin kanserle ilişkisi hakkında yapılmış olan bütün çalışmalarda, HtrA1 geninin tümör baskılayıcı bir
gen olabileceği yönünde fikirler ileri sürülmüştür. Bu çalışmada; HtrA1 geninin biyolojik süreçlerdeki
işlevleri, çeşitli hastalıklarla ilişkileri, özellikle kanser gelişimi ve tedavisindeki rolleri ele alındı. 

Anahtar Kelimeler

Serin proteaz, kanser, tedavi

HtrA1 Gene and Functions

Öz

HtrAgene family (High temperature requirement A) is related to development and its high expression levels
have an important role in protection of organism's liveliness and development. The gene of HtrA1 which
belongs to the family of HtrA gene codes the HtrA1 protein having serine protease function. HtrA serine
proteases have been considered as potential goal in treatment of cancer in that it provides chemotherapeutic
cell toxicity. It has been revealed by many studies that HtrA1 expression level decreases in some cancer types
and overexpression of HtrA1 inhibits growth of in vitro and in vivo tumor. Also, it has been claimed that
HtrA1 could be a new treatment for several diseases. Especially, the expression of HtrA1 increases with the
use of cisplatin and paclitaxel used commonly as antitumor agent in the treatment of solid tumours. The
results obtained in other HtrA gen family and cancer related studies till this time, it is asserted through the
opinions of researchers that that HtrA1 could be a tumor supressor gene. In this study, functions in
biologycal processes of HtrA1 gene, relationships with various diseases, particularly their role in cancer
development and treatment were discussed.

Anahtar Kelimeler

Serine protease, cancer, therapy

Kaynakça

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