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The high incidence of breast cancer cases in the world requires the use of applicative methods. The 7,12-dimethylbenz(a)anthracene (DMBA) induced breast cancer animal model is a widely used chemical-induced animal models for research on breast cancer. However, the molecular mechanism related to DMBA induction remains unclear. Good understanding on DMBA-induced animal models is crucial for studies related to future breast cancer treatments as animal models will provide a deeper understanding of anticancer medication, specifically those aimed for treating breast cancer. The aim of this study was to develop an DMBA-induced animal model for breast cancer. This study used female Wistar rats injected subcutaneously with DMBA as a carcinogen-induced agent (20 mg/kg) to induce tumor. Rat tumors were then evaluated and breast appearance was observed weekly, starting from day 28th after DMBA injection. Breast cancer tissue was then sampled and stored at -80°C until it was used for western blot and histological study. This study indicated that DMBA induced cancer in female Wistar rat’s breasts, and cytoplastic cells and lung metastatic was identified macroscopically and histopathologically. The metabolic sign was observed in the lung and breast sections. Interestingly, the DMBA induction in this study does not only induce organ cancers but also induces estrogen receptors and stimulates signaling of estrogen receptors α (ERα), ERβ, and Akt.

A myokine is one of the proteins that are produced and released by myocytes in response to muscular contractions when doing physical exercise. One protein that is thought to function as myokine is FGF23.The purpose of this study was to determine the effect of acute physical exercise with moderate intensity on the expression of FGF23 gene in Wistar rat heart. This was an animal experimental study using 24 male Wistar rats that were divided into 4 groups:treatment groups that performed 30 minute acutephysical exercise with moderate intensity (20 m/min) for 3 days, 6 days, and 15 days and a control group without physical exercise. The study was conducted in the Animal Laboratory and Central Laboratory of Universitas Padjadjaran during the period of February to July 2019. Data observed were the FGF23 gene expressions in Wistar rats heart. Data were analyzed using Kruskal-Wallis and Mann-Whitney tests. The results from the Kruskal-Wallis test showed that acute physical exercise with moderate intensity did not increase the FGF23 gene expression in Wistar rat heart (p>0.05), and the average of relative ratios of FGF23/GAPDH gene expression were as follows: control (0.970±0,03), 3 days (0.992±0.03), 6 days (1.014±0.05), and 15 days (1.056±0.02). GAPDH was used in this study as a housekeeping gene since its expression is very constant. This study proves that FGF23 is more likely to take a role in the cardiac remodeling process, especially those associated with cardiac hypertrophy after chronic exercise with no effect observed after acute physical exercise with moderate intensity in Wistar rat heart. Pengaruh Latihan Fisik Akut Intensitas Sedang terhadap Ekspresi Gen FGF23 pada Jantung Tikus Galur Wistar Miokin diproduksi dan dilepaskan oleh miosit sebagai respons terhadap latihan fisik. Salah satu protein yang diduga berfungsi sebagai miokin adalah FGF23. Penelitian ini bertujuan mengetahui pengaruh latihan fisik akut intensitas sedang terhadap ekspresi gen FGF23 pada jantung tikus galur Wistar. Penelitian ini menggunakan desain eksperimental dengan tikus galur Wistar jantan yang berjumlah 24 tikus. Tikus dibagi menjadi 4 kelompok untuk diberi perlakuan latihan fisik intensitas sedang (20 meter/menit) dengan durasi 30 menit, selama 3 hari, 6 hari, dan 15 hari serta kelompok tanpa latihan fisik. Penelitian ini dilakukan di Lab Hewan dan Lab Sentral Universitas Padjadjaran pada bulan Februari hingga Juli 2019. Ekspresi gen FGF23 pada jantung tikus galur Wistar dilihat dengan PCR. Analisis data menggunakan uji Kruskal-Wallis dan Mann-Whitney. Uji statistik tidak mendapatkan peningkatan ekspresi gen FGF23 setelah dilakukan latihan fisik akut intensitas sedang selama 3 hari, 6 hari dan 15 hari (p>0,05) dan didapatkan rasio relatif ekspresi gen FGF23/GAPDH otot jantung pada : kontrol (0,970±0,03), hari 3 (0,992±0,03), hari 6 (1,014±0,05), hari 15 (1,056±0,02). GAPDH digunakan dalam studi ini sebagai gen ‘housekeping’ karena ekspresinya yang sangat konstan. Studi ini membuktikan bahwa FGF23 mungkin lebih berperan dalam proses remodeling jantung, terutama yang berhubungan dengan hipertrofi jantung setelah latihan fisik kronik. Simpulan, tidak terdapat pengaruh latihan fisik akut intensitas sedang terhadap ekspresi gen FGF23 pada jantung tikus galur Wistar.

Hypertension is a condition of persistently high blood pressure. It is currently a big health issue as its prevalence is high in Indonesia and its complications are numerous and deadly. Salt intake is one of the modifiable factors of hypertension. According to a study by Indonesian Ministry of Health, salt consumption in Indonesia is almost two times greater than the recommended salt diet from WHO. Sodium reabsorption in kidney plays a role in regulating blood pressure. Epithelial sodium channel (ENaC) is one of the structures that function in sodium reabsorption in kidney tubules. This study was conducted at the Central Laboratory and Animal Laboratory of the Faculty of Medicine Universitas Padjadjaran from June to Desember 2018. The aim of this study was to analyze the effect of high sodium diet on the expression of ENaC gene in kidney tubules of rats. Twelve Rattus norvegicus wistar rats were divided into two groups of control and treatment. Treatment group was given daily 2 mL NaCl solution treatment using gavage for 8 weeks. The expression of ENaC α, β, and γ was obtained by running tissue samples from kidney cortex and medulla in polymerase chain reaction and electrophoresis. The result showed that there was an insignificant decrease in ENaC α, β, and γ gene expressions in both kidney cortex and medulla of the treatment group when compared to control groupThis study concludes that ENaC gene expression is not significantly affected by high sodium diet. Pengaruh Diet Tinggi Natrium terhadap Perubahan Ekspresi Gen Epithelial Sodium Channel (ENaC) pada Tubulus Ginjal Tikus Hipertensi merupakan kondisi tekanan darah tinggi dalam waktu lama. Prevalensi dan komplikasi hipertensi menyebabkan hipertensi menjadi isu kesehatan yang cukup besar. Jumlah asupan garam merupakan faktor hipertensi yang dapat dimodifikasi. Berdasar studi Kementrian Kesehatan Indonesia, konsumsi garam di Indonesia rerata dua kali lipat lebih banyak daripada rekomendasi WHO. Reabsorpsi natrium pada ginjal berperan penting pada regulasi tekanan darah. Fungsi ini diperankan oleh epithelial sodium channel (ENaC) yang berfungsi untuk reabsorpsi natrium. Penelitian ini dilakukan di Laboratorium Sentral dan Laboratorium Hewan Fakultas Kedokteran pada Juni–Desember 2018. Tujuan penelitian ini menganalisis efek diet tinggi natrium pada ekspresi gen dari ENaC di tubulus ginjal pada tikus. Duabelas ekor tikus Rattus norvegicus dibagi menjadi dua kelompok, yaitu kontrol dan perlakuan. Kelompok perlakuan diberikan 2 mL larutan NaCl setiap hari selama 8 minggu. Larutan diberikan melalui paksa (gavage). Ekspresi gen ENaC α, β, γ dari korteks dan medula ginjal diamplifikasi dengan PCR dan dideteksi dengan elektroforesis. Pita protein dari gel elektroforesis dinilai intensitasnya dengan software ImageJ. Hasil dari elektroforesis menunjukkan penurunan ekspresi gen ENaC α, β, γ di korteks dan medulla pada kelompok perlakuan dibanding dengan kontrol. Studi ini menyimpulkan ekspresi gen ENaC pada korteks dan medulla ginjal tidak signifikan dipengaruhi oleh diet tinggi natrium.

Aerobic physical activity is known to induce skeletal muscle adaptation. Some genes, including MyoD, are known to have a major role in the process of muscle adaptation. Several studies has stated that the expression of MyoD increases during the aerobic activity process; however, the studies were carried out in a single bout. Studies on the effects of acute phase exercise (