난소 내 황체조직에서 발정주기별 H-Ras, RLIP76, Angiogenic Receptors mRNA와 Protein의 발현
Expression of H-ras, RLIP76 mRNA and Protein, and Angiogenic Receptors in Corpus Luteum Tissues during Estrous Cycles
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초록
황체는 발정주기에 따라 형성과 퇴행이 반복되는 일시적인내분비기관이다. 본 연구에서는 황체와 종양의 혈관신생과정이 기능적과 구조적 기전이 유사하다는 가정하에 실시하였다. 먼저, 우리는 혈관신생관련 수용체인 VEGFR2와 Tie 2 mRNA 와 단백질 발현을 검토하였다. 또한, RLIP76와 H-ras의 발현도측정하였다. 그 결과, 초기와 중기황체에서 VEGFR2와 Tie 2 mRNA와 단백질의 발현되었으나, 후기황체에서는 발현이 감소하였다. H-ras의 경우, mRMA와 단백질 모두 초기와 중기황체에서 발현되었으나, 후기황체에서는 발현되지 않았다. RLIP76 mRNA은 모든 황체주기에서 발현되었고, 단백질은 초기황체에서 강하게 발현되었다. 이상의 결과를 토대로, RLIP76 와 H-ras는 황체의 기능에 관여하고, 황체의 혈관신생과정 메커니즘에 중요한 역할을 할 것이다.
Abstract
Corpus luteum (CL) is a transient endocrinal tissue that undergoes repeated formation and regression during the estrous cycle. In this study, we hypothesized that the functional and structural mechanism of angiogenesis is similar between CL and tumor formation. First, we measured mRNA and protein expression of angiogenic receptors (vascular endothelial growth factor receptor-2, VEGFR2; Tie 2) in the early, middle, and late phase CL tissues during the estrous cycle. Ral-interacting protein of 76 kDa (RLIP76) and H-ras mRNA and protein were also expressed in the CL tissues. VEGFR2 and Tie 2 mRNA and protein were expressed in the early and middle phase CLs and decreased in the late phase. H-ras mRNA and protein were expressed in the early and middle phase CLs, but not in the late phase. RLIP76 mRNA was expressed in all phase CLs, and the protein expression was highest in early phase CLs. We suggest that RLIP76 and H-ras, an oncogenic gene, regulate the function of the CL during the estrous cycle, and the proteins will play an important role in the angiogenic mechanism of the CL.
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