PMID- 19478209 OWN - NLM STAT- MEDLINE DCOM- 20090819 LR - 20161122 IS - 1524-4628 (Electronic) IS - 0039-2499 (Linking) VI - 40 IP - 8 DP - 2009 Aug TI - Dietary protein, but not carbohydrate, is a primary determinant of the onset of stroke in stroke-prone spontaneously hypertensive rats. PG - 2828-35 LID - 10.1161/STROKEAHA.109.555383 [doi] AB - BACKGROUND AND PURPOSE: Previously, an inverse association has been found between the dietary proportion of protein or fat and incidence of intracerebral hemorrhage. A positive association has been found with respect to carbohydrate intake. To examine what changes in macronutrient intake are causative, animal studies were conducted. METHODS: Stroke-prone spontaneously hypertensive rats (SHRSP) were fed diets with varying ratios of macronutrients ad libitum, and the onset of stroke was examined. RESULTS: When 10% of calories were from fat, rats fed a high-protein/low-carbohydrate diet (55% calories from protein) had a delayed onset of stroke, whereas rats fed a low-protein/high-carbohydrate diet (5% calories from protein) had an accelerated onset of stroke. When 30% of calories were from carbohydrate, a marked delay in the onset of stroke was observed when the diet was high in protein. When 85% of calories were from carbohydrate, rats fed 7.5% of calories as protein displayed an accelerated onset of stroke. When 20% of calories were from protein, increased fat content did not affect the onset of stroke. However, with a fat-free diet, when 20% of calories were from protein, the onset of stroke was delayed, whereas when 10% of calories were from protein, the onset of stroke was accelerated. CONCLUSIONS: The amount of protein, but not of carbohydrate and fat, is a primary determinant of the onset of stroke. However, when calories from protein are relatively low in the diet (10%), fat is necessary to delay the onset of stroke in SHRSP. FAU - Chiba, Tsuyoshi AU - Chiba T AD - Nutritional Science Program, National Institute of Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8636, Japan. FAU - Itoh, Tatsuki AU - Itoh T FAU - Tabuchi, Masaki AU - Tabuchi M FAU - Satou, Takao AU - Satou T FAU - Ezaki, Osamu AU - Ezaki O LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090528 PL - United States TA - Stroke JT - Stroke JID - 0235266 RN - 0 (Dietary Carbohydrates) RN - 0 (Dietary Fats) RN - 0 (Dietary Proteins) SB - IM MH - Animals MH - Body Weight/physiology MH - Dietary Carbohydrates/*administration & dosage MH - Dietary Fats/administration & dosage MH - Dietary Proteins/*administration & dosage/*adverse effects MH - Eating/physiology MH - Hypertension/*complications/physiopathology MH - Male MH - Rats MH - Rats, Inbred SHR MH - Stroke/*etiology/physiopathology EDAT- 2009/05/30 09:00 MHDA- 2009/08/20 09:00 CRDT- 2009/05/30 09:00 PHST- 2009/05/30 09:00 [entrez] PHST- 2009/05/30 09:00 [pubmed] PHST- 2009/08/20 09:00 [medline] AID - STROKEAHA.109.555383 [pii] AID - 10.1161/STROKEAHA.109.555383 [doi] PST - ppublish SO - Stroke. 2009 Aug;40(8):2828-35. doi: 10.1161/STROKEAHA.109.555383. Epub 2009 May 28.