PERBEDAAN EKSPRESI PROTEIN CYCLIN D1 ANTARA ADENOMA DAN ADENOKARSINOMA KOLOREKTAL, SERTA KORELASINYA DENGAN GRADING DAN STADIUM TUMOR
DOI:
https://doi.org/10.21776/ub.majalahkesehatan.2020.007.03.1Keywords:
adenokarsinoma, cyclin D1, grading, kolorektal, stadiumAbstract
Sebagian besar karsinoma kolorektal adalah adenokarsinoma, dan lebih dari 95% karsinoma kolorektal diawali oleh lesi prekursor yaitu adenoma. Risiko suatu adenoma berubah menjadi suatu karsinoma akan lebih tinggi pada adenoma dengan ukuran lebih dari 1 cm, tipe villous, dan disertai displasia high grade. Telah diketahui bahwa grading dan stadium merupakan faktor prognostik penting baik pada adenoma maupun adenokarsinoma. Perkembangan adenoma menjadi adenokarsinoma melibatkan peran banyak gen dan protein, salah satunya cyclin D1 yang berperan meningkatkan proliferasi sel, angiogenesis dan invasi sel. Penelitian ini bertujuan untuk mengetahui perbedaan ekspresi cyclin D1 antara adenoma dan adenokarsinoma kolorektal, serta hubungannya dengan grading dan stadium tumor. Lalu, ditentukan 30 sampel untuk masing-masing adenoma dan adenokarsinoma yang diambil dari Instalasi Patologi Anatomi RS. dr. Saiful Anwar Malang. Keseluruhan sampel dilakukan pulasan imunohistokimia dengan antibodi cyclin D1 kemudian dihitung persentase ekspresinya, dan dianalisis hubungan antara cyclin D1 tersebut dengan grading pada adenoma dan grading serta stadium pada adenokarsinoma. Hasil penelitian menunjukkan terdapat perbedaan ekspresi cyclin D1 yang bermakna antara kelompok adenoma dan adenokarsinoma dengan p < 0,01. Tidak terdapat hubungan yang bermakna antara ekspresi cyclin D1 dengan grading adenoma serta grading dan stadium adenokarsinoma (p > 0,05). Kesimpulan penelitian ini adalah ekspresi cyclin D1 dapat digunakan untuk membedakan antara adenoma dan adenokarsinoma, tetapi ekspresi tersebut tidak berhubungan dengan grading dan stadium tumor.
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