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Abstrak :
Human oral tongue cancer (SP-C1) is thought to be a high grade malignancy. Despite advances in surgery, radiotherapy, chemotherapy and combination therapy, prognosis and survival of patients with human tongue cancer have not significantly improved over the past several decades. Treatment options for recurrent or refractory tongue cancer are limited. Therefore, as a strategy for refractory cancer, anti-mitotic chemotherapy and its mechanisms are of considerable interest, including those using docetaxel hydrate for inducing maspin protein. In the current study, the mechanisms responsible for growth suppression and metastasis of SP-C1 by docetaxel hydrate through induction of maspin regulation were investigated. To evaluate in vitro cell proliferation and cell metastasis, MTT and out-growth assays were performed, respectively. Furthermore, the expression of maspin mediated by docetaxel hydrate was analysed by Western blotting. The results showed that treatment with 50 g/ml docetaxel hydrate significantly suppressed SP-C1 cell growth from day 1. Strong inhibition of metastasis of SP-C1 cells was also shown by treatment with 50 g/ml of docetaxel hydrate. Moreover, a significant induction of maspin regulation was detected in cells treated with 10 and 50 g/ml of docetaxel hydrate. However, the same protein level was demonstrated in -tubulin expression. These findings suggest that docetaxel hydrate may have potential for powerful anti-mitotic chemotherapy through induction of maspin regulation.

Abstrak :
Penelitian ini bertujuan untuk mengkaji efek ekstrak etanol daun tanaman keladi tikus (typhonium flagelliforme lodd.) pada invasi sel kanker lidah manusia (SP-C1). Jenis penelitian ini adalah penelitian eksperimental laboraotris murni terhadap sel kanker lidah manusia (SP-C1) yang diberi perlakuan dengan ekstrak etanol daun keladi tikus. Biakan sel SP-C1 diinkubasikan dengan ekstrak etanol daun tanaman keladi tikus dalam berbagai konsentrasi 90, 25, 50, 75, 100, 125 ug/ml) selama 24 jam, sebagai kontrol negatif digunakan biakan sel SP-C1 dalam Rosswell Park Memorial Institute 1640 (RPMI-1640). Alat ukur yang digunakan untuk mengetahui aktivitas invasi sel SP-C1 setelah diberi perlakuan ekstrak etanol daun tanaman keladi tikus menggunakan alat Boyden chamber. Berdasarkan hasil penelitian menunjukkan penurunan jumlah biakan sel SP-C1 secara signifikan terlihat pada perlakuan dengan ekstrak etanol daun keladi tkus konsentrasi 125 ug/ml dibandingkan kontrol maupun kelompok perlakuan. Disimpulkan bahwa ekstrak etanol daun keladi tikus mempunyai pengaruh signifikan dalam menghambat invasi sel SP-C1.