Knowledge on the role of early nutritional stimuli as triggers of meta terjemahan - Knowledge on the role of early nutritional stimuli as triggers of meta Bahasa Indonesia Bagaimana mengatakan

Knowledge on the role of early nutr

Knowledge on the role of early nutritional stimuli as triggers of metabolic pathways in fish is extremely scarce. The objective of the present study was to assess the long-term effects of glucose injection in the yolk (early stimulus) on carbohydrate metabolism and gene regulation in zebrafish juveniles challenged with a high-carbohydrate low-protein (HC) diet. Eggs were microinjected at 1 d post-fertilisation (dpf) with either glucose (2 M) or saline solutions. Up to 25 dpf, fish were fed a low-carbohydrate high-protein (LC) control diet, which was followed by a challenge with the HC diet. Survival and growth of 35 dpf juveniles were not affected by injection or the HC diet. Glucose stimulus induced some long-term metabolic changes in the juveniles, as shown by the altered expression of genes involved in glucose metabolism. On glycolysis, the expression levels of hexokinase 1 (HK1) and phosphofructokinase-6 (6PFK) were up-regulated in the visc- eral and muscle tissues, respectively, of juveniles exposed to the glucose stimulus, indicating a possible improvement in glucose oxidation. On gluconeogenesis, the inhibition of the expression levels of PEPCK in fish injected with glucose suggested lower production of hepatic glucose. Unexpectedly, fructose-1,6-bisphosphatase (FBP) expression was induced and 6PFK expression reduced by glucose stimulus, leaving the possibility of a specific regulation of the FBP – 6PFK metabolic cycle. Glucose metabolism in juveniles was estimated using
a [14C]glucose tracer; fish previously exposed to the stimulus showed lower retention of [14C]glucose in visceral tissue (but not in
muscle tissue) and, accordingly, higher glucose catabolism, in comparison with the saline group. Globally, our data suggest that glucose stimulus at embryo stage has the potential to alter particular steps of glucose metabolism in zebrafish juveniles.
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Pengetahuan tentang peran rangsangan gizi awal sebagai pemicu jalur metabolik ikan sangat langka. Tujuan dari penelitian ini adalah untuk menilai efek jangka panjang dari injeksi glukosa dalam kuning telur (awal stimulus) pada karbohidrat metabolisme dan gene peraturan dalam zebrafish remaja ditantang dengan Diet tinggi karbohidrat rendah protein (HC) diet. Telur yang microinjected di 1 d pasca pembuahan (dpf) dengan glukosa (2 M) atau salin solusi. Sampai dengan 25 dpf, ikan diberi makan karbohidrat diet protein tinggi (LC) kontrol, yang diikuti oleh tantangan dengan HC diet. Kelangsungan hidup dan pertumbuhan 35 dpf remaja tidak terpengaruh oleh suntikan atau HC diet. Glukosa stimulus disebabkan beberapa perubahan metabolik jangka panjang dalam remaja, seperti yang ditunjukkan oleh berubah ekspresi gen yang terlibat dalam metabolisme glukosa. Pada glikolisis, tingkat ekspresi hexokinase 1 (HK1) dan phosphofructokinase-6 (6PFK) adalah up-diatur dalam visc-memeriksa dan jaringan otot, masing-masing, remaja terkena rangsangan glukosa, menunjukkan perbaikan yang mungkin tajam pada oksidasi. Pada glukoneogenesis, penghambatan tingkat ekspresi PEPCK ikan disuntik dengan glukosa menyarankan menurunkan produksi glukosa hepatik. Tiba-tiba, fruktosa-1,6-bisphosphatase (FBP) ekspresi diinduksi dan 6PFK ekspresi dikurangi dengan rangsangan glukosa, meninggalkan kemungkinan peraturan spesifik FBP – 6PFK metabolik siklus. Metabolisme glukosa dalam remaja diperkirakan menggunakantracer glukosa [14C]; ikan sebelumnya terkena stimulus menunjukkan retensi rendah [14C] glukosa dalam mendalam jaringan (tetapi tidak dalamjaringan otot) dan, dengan demikian, katabolisme glukosa lebih tinggi, dibandingkan dengan kelompok saline. Secara global, data kami menunjukkan bahwa glukosa stimulus pada tahap embrio memiliki potensi untuk mengubah langkah-langkah tertentu dari metabolisme glukosa dalam zebrafish remaja.
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