Abstract:Proses penuaan kulit terjadi karena kombinasi penurunan kapasitas proliferasi sel-sel kulit, berkurangnya sintesis matriks dermis, dan peningkatan ekspresi enzim yang mendegradasi matriks kolagen. Penelitian ini merupakan eksperimental laboratorik, menggunakan 24 ekor tikus jantan galur Sprague-Dawley sebagai objek penelitian. Pada kelompok perakuan, kulit dorsal kedua kelompok dicukur, kemudian diberikan paparan sinar UVB seminggu tiga kali selama 4 minggu dengan dosis total penyinaran 840 mJ/ cm 2. Kulit kel… Show more
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