Hasil Pencarian  ::  Simpan CSV :: Kembali

"Mitokondria merupakan organel yang memetabolisme besi secara ekstensif, sehingga menjadi target kerusakan yang diinduksi besi pada kondisi hemosiderosis. Produksi reactive oxygen species (ROS) yang tinggi di mitokondria dapat lebih meningkat saat ada besi bebas yang kemudian memicu reaksi Fenton. Produksi ROS yang tinggi dapat menyebabkan stres oksidatif, sehingga regulasi konsentrasi besi harus diatur dengan ketat. Phaleria macrocarpa diketahui mengandung senyawa aktif mangiferin yang telah terbukti memiliki aktivitas kelasi besi, namun belum diketahui apakah dapat bekerja di mitokondria. Penelitian ini bertujuan untuk mengetahui efektivitas ekstrak etanol buah Phaleria macrocarpa dalam melindungi mitokondria hati dari kerusakan akibat besi dan kaitannya dengan transporter influks dan efluks besi di hati tikus model hemosiderosis. Penelitian ini menggunakan organ hati tersimpan dari tikus Sprague-Dawleyjantan sebanyak 30 ekor yang dibagi secara acak ke dalam 6 kelompok, yaitu normal (N) dan kelompok hemosiderosis tanpa terapi (Fe), diterapi deferiprone 462,5 mg/kgBB (Fe+DFP), mangiferin 50 mg/kgBB (Fe+M), serta ekstrak etanol buah Phaleria macrocarpa dosis 100 mg/kgBB (Fe+PM100) dan 200 mg/kgBB (Fe+PM200). Dilakukan analisis kadar MnSOD, copy number mtDNA, dan analisis ekspresi mRNA DMT1, ZIP14, MFRN1, MFRN2, ABCB7, dan ABCB8 yang dilaporkan berperan dalam transpor besi ke dalam sel dan mitokondria. Hasil penelitian menunjukkan bahwa ekstrak Phaleria macrocarpa memengaruhi ekspresi gen transporter besi namun tidak dapat memperbaiki penanda kerusakan mitokondria pada organ hati hemosiderosis.......Mitochondria are organelles that metabolize iron extensively, making them targets for iron-induced damage. The high production of reactive oxygen species (ROS) in mitochondria can be further increased when there is free iron which then triggers the Fenton reaction. High ROS production can cause oxidative stress, so iron concentration regulation must be strictly regulated. Phaleria macrocarpa is known to contain the active compound mangiferin which has been shown to have iron chelation activity, but it is not yet known whether it can work in mitochondria. This study aims to determine the effectiveness of the ethanol extract of Phaleria macrocarpa fruit in protecting liver mitochondria from iron-induced damage and its relation to iron influx and efflux transporters in the liver of hemosiderosis rat models. This study used stored liver organs from 30 male Sprague-Dawley rats which were randomly divided into 6 groups, namely normal (N) and hemosiderosis groups without therapy (Fe), treated with deferiprone 462.5 mg/kgBW (Fe+DFP), mangiferin 50 mg/kgBW (Fe+M), and Phaleria macrocarpa fruit ethanolic extract at a dose of 100 mg/kgBW (Fe+PM100) and 200 mg/kgBW (Fe+PM200). Analysis of MnSOD levels, mtDNA copy number, and analysis of relative mRNA expression of DMT1, ZIP14, MFRN1, MFRN2, ABCB7, and ABCB8 were performed which were reported to play a role in iron transport into cells and mitochondria. The results showed that Phaleria macrocarpa extract has the potential to modulate the expression of iron transporter genes but was not able to ameliorate the mitochondrial damage marker in hemosiderosis liver."

"Latar Belakang: Phaleria macrocarpa (PM) mengandung mangiferin yang memiliki kemampuan sebagai kelator besi dengan membentuk kompleks. Kompleks dapat menekan akumulasi besi pada pasien talasemia yang rutin transfusi. Kondisi besi berlebih dapat mempengaruhi terjadinya cedera organ ginjal. Penelitian bertujuan untuk mengetahui efektivitas ekstrak etanol buah PM sebagai agen kelator besi diamati pada organ ginjal tikus model besi berlebih. Metode: 30 tikus Sprague-Dawley dibagi acak 6 kelompok: normal (N), besi berlebih (KN), besi berlebih diobati Deferiprone dosis 462,5 mg/kgBB (D), besi berlebih diobati mangiferin dosis 50mg /kgBB (M), besi berlebih diobati ekstrak PM dosis 100mg/kgBB (PM100), besi berlebih diobati ekstrak PM dosis 200mg/kgBB (PM200). Injeksi besi diberikan 2kali/minggu selama 3 minggu dilanjutkan 8 minggu bersama pengobatan. Kadar besi ginjal diukur menggunakan AAS. Kadar urea dan kreatinin plasma serta TNF-α ginjal diukur menggunakan kit. Hasil: Mangiferin dari ekstrak terdeteksi pada ginjal tikus model besi berlebih diukur dengan HPLC. Mangiferin dan PM tidak dapat menurunkan kadar besi di organ ginjal dan kadar ureum plasma signifikan. Pengaruh mangiferin dan PM pada kadar kreatinin plasma tidak linier. Mangiferin dan PM dapat menurunkan kadar TNF-α ginjal signifikan dengan KN dan D.Kesimpulan: Mangiferin dan PM memiliki potensi kelator besi dan menurunkan respon inflamasi pada kondisi besi berlebih.......Background: Mangiferin, active compound in Phaleria macrocarpa (PM), has been shown as an iron chelating agent by forming complexes. The complex can reduce iron accumulation in thalassemia patients receive transfusions. Renal organ failure can be impacted by the high iron. This study aims to determine the effectiveness of ethanolic extract of PM fruit as iron chelating agent observed in the kidney of iron overload rat. Methods: 30 Sprague-Dawley divided randomly six groups: normal (N), iron-overload (KN), iron-overload treated Deferiprone dosage 462,5 mg/kgBW (D), iron-overload treated mangiferin dosage 50mg/kgBW (M), iron-overload treated PM extract dosage 100mg/kgBW (PM100) and iron-overload treated with PM extract dosage 200mg/kgBW (PM200). Iron injection was administered twice/week for 3 weeks, continued 8 weeks with treatment. Kidney iron levels of rats measured using AAS. Plasma urea and creatinine levels as well as renal TNF-α measured using kit.Results: Mangiferin from extract was detected in the kidney of rat iron overload models which measured using HPLC. Mangiferin and PM cannot significantly reduce plasma urea and kidney iron levels. Effect of mangiferin and PM on plasma creatinine levels not linearly. Mangiferin and PM can reduce renal TNF-α levels significantly. Conclusion: Mangiferin and PM have ability as iron chelator and reduce inflammatory response caused iron overload."