Nutritional status of Papua New Guinea Highlanders.

Okuda, Toyoko; Kajiwara, Naemi; Date, Chigusa; Sugimoto, Kyoko; Rikimaru, Toru; Fujita, Yoshiaki; Koishi, Hideo

doi:10.3177/jnsv.27.319

Cited by 15 publications

(12 citation statements)

References 14 publications

(15 reference statements)

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“…Many investigators have reported that sweet-potato eaters of Papua New Guinea subsist on a low protein intake, but that they are not malnourished, and also have suggested the possibility that they undergo metabolic adaptation to a low protein intake (6)(7)(8)(9)(10)(11)(12). Based on the finding that urea can be utilized during protein deficiency, we postulated that an adaptation to a low protein intake by Papua New Guinea highlanders may be in the form of utilization of the nitrogen of endogenous urea.…”

Section: Discussionmentioning

confidence: 99%

Utilization of urea nitrogen in Papua New Guinea highlanders.

Rikimaru

Fujita

Okuda

et al. 1985

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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SummaryThe utilization of urea nitrogen was examined in 10 healthy adult men from a village near Lufa, in the Eastern Highlands Province of Papua New Guinea. The staple diet of these men was sweet potatoes .[15N]urea was used as tracer for urea released into their intestinal tracts and the utilization of the urea-N was estimated from the trend of 15N. The men were orally given [15N]urea at the beginning of the study and then their daily protein intake, serum protein levels, 15N excretion in the feces and urine, 15N retention in the whole body and 15N incorporation into serum protein were examined.

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Section: Discussionmentioning

confidence: 99%

Utilization of urea nitrogen in Papua New Guinea highlanders.

Rikimaru

Fujita

Okuda

et al. 1985

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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“…Studies were done in the village of Kalugaluvi near Lufa in the Eastern Highlands of PNG. Details of the PNG highlanders' village and their life style were reported elsewhere (8). The subjects were 9 healthy men .…”

Section: Methodsmentioning

confidence: 99%

Effects of low protein intake on protein metabolism of Papua New Guinea highlanders studied with (15N)glycine.

Okuda

Fujita

et al. 1988

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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“…Studies were carried out in 1980 at the village of Beha near Lufa in the Eastern Highlands Province of PNG and on Osaka in Japan. Details of the PNG highlanders' village and their way of living were reported elsewhere (KOISHI et al, 1979;OKUDA et al, 1981).…”

Section: Methodsmentioning

confidence: 99%

“…On the dietary survey carried out in 1978, the highlanders' daily protein intake was 0.6 g/kg body weight, which was about half of the Japanese recommended allowance (1980) (OKUDA et al, 1981). Sweet potatoes contributed 47.6°c of the total protein consumed.…”

mentioning

confidence: 98%

“…In order to clarify the above problem, we have carried out a dietary survey, biochemical tests on the blood, examination of physical characteristics (OKUDA et al, 1981) and a study of protein metabolism in the male highlanders of PNG (FUJITA et al, 1986). On the dietary survey carried out in 1978, the highlanders' daily protein intake was 0.6 g/kg body weight, which was about half of the Japanese recommended allowance (1980) (OKUDA et al, 1981).…”

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confidence: 99%

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Effect of dietary protein levels on urea utilization in Papua New Guinea highlanders.

et al. 1986

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Ability to utilize urea nitrogen for body protein synthesis was examined with Papua New Guinea (PNG) highlanders and Japanese (JPN). Eight male PNG highlanders and 8 male JPN were fed on a low protein diet containing 0.55 g protein/kg or an adequate protein diet containing l.34 g protein/kg for 1 or 2 weeks. The fate of 15N was measured after oral administration of 15N-labelled urea. There was no difference in 15N incorporation into serum protein between PNG highlanders and JPN receiving low protein diets. On the other hand, on the adequate protein diet, 15N incorporation in PNG highlanders was similar to that on the low protein diet, in contrast to that in JPN which was hardly detected in the adequate protein diet. When PNG highlanders take more protein than protein in their usual diet, they effectively incorporate ingested protein into their body protein and urea nitrogen is utilized for synthesis of body protein.

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Nutritional status of Papua New Guinea Highlanders.

Cited by 15 publications

References 14 publications

Utilization of urea nitrogen in Papua New Guinea highlanders.

Utilization of urea nitrogen in Papua New Guinea highlanders.

Effects of low protein intake on protein metabolism of Papua New Guinea highlanders studied with (15N)glycine.

Effect of dietary protein levels on urea utilization in Papua New Guinea highlanders.

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