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ARTIKEL ASLI
PEMAKAIAN RETINOID SISTEMIK DI BIDANG DERMATOLOGI
Yenny Raflis, Sri Lestari
Bagian Ilmu Kesehatan Kulit dan Kelamin FK Universitas Andalas/RS. dr. M. Djamil Padang
ABSTRAK

       Retinoid adalah suatu kelompok senyawa alami atau sintetik yang secara struktural dan fungsional analog dengan vitamin A. Terapi retinoid dapat diberikan secara topikal maupun sistemik. Pada jalur sistemik, di mukosa intestinal, retinoid diesterifikasi menjadi retinyl ester oleh enzim lechitin retinol acyl transferase (LRAT), kemudian diabsorpsi dan disimpan di hepar dalam bentuk retinol ester. Efek retinoid pada kulit manusia diperantarai oleh retinoic acid receptors(RARs) dan retinoid X receptors (RXRs). Dalam inti sel, terbentuk kompleks ikatan retinoid dengan protein reseptor RARs dan RXRs dalam bentuk dimer. Dimer kompleks retinoid dan reseptor selanjutnya mengaktivasi gen yang memiliki sekuen DNA pendek spesifik yang disebut dengan retinoid acid response elements (RAREs dan RXREs) dan kemudian mengalami transkripsi dan translasi gen. Pemakaian retinoid terutama bentuk sintetiknya berkembang sangat pesat untuk berbagai penyakit kulit antara lain psoriasis, iktiosis, akne, serta kanker kulit, namun perlu berhati-hati dalam pemakaiannya mengingat efek samping yang dapat ditimbulkan obat ini.(MDVI 2011; 38/3:25-30)

Kata kunci: Retinoid sistemik, retinoic acid receptors (RARs), retinoid X receptors (RXRs)

ABSTRACT

       Retinoids are a group of natural and synthetic compounds that are structurally and functionally analogous to vitamin A. Retinoid therapy can be administered topically or systemically. On systemic administration, in the intestinal mucosa, retinoids are esterified into retinyl esters by lecithin retinol acyl transferase (LRAT) enzyme, then absorbed and stored in the liver as retinol esters. Retinoid effects on human skin mediated by retinoic acid receptors (RARs) and retinoid X receptors (RXRs). In the nucleus, retinoid bound to RARs and RXRs as dimers. Dimers complex retinoid and receptor subsequently activates genes that have a specific short DNA sequences called retinoic acid response elements (RAREs and RXREs) and later underwent gene transcription and translation. Retinoids specially synthetic form have widely used for various skin diseases such as psoriasis, ichtyosis, acne, and skin cancer, but we must be careful when using it as a treatment, considering the side effects.(MDVI 2011; 38/3:134 - 140)

Key words: systemic retinoids, retinoic acid receptors (RARs), retinoid X receptors (RXRs)


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