Studies on protein nutrition of Papua New Guinea highlanders: Nitrogen balance and hematological studies.

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

doi:10.3177/jnsv.28.431

Cited by 12 publications

(6 citation statements)

References 11 publications

(3 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In any case, our results are similar to those of Fujita (Fujita et al, 1982), who studied the highlanders from Papua New Guinea at 1500 m above sea level. These people utilized proteins in a more efficient way than Japanese subjects.…”

Section: Figsupporting

confidence: 92%

Effect of High Altitude on Protein Metabolism in Bolivian Children

Miguel

Spielvogel²,

Berger³

et al. 2002

High Altitude Medicine & Biology

View full text Add to dashboard Cite

In Bolivia, malnutrition in children is a major health problem that may be caused by inadequate protein, energy, and micronutrient intake; exposure to bacterial and parasitic infections; and life in a multistress environment (high altitude, cold, cosmic radiation, low ambient humidity). However, no data on protein absorption and utilization at high altitude were available. Therefore, we evaluated the effect of altitude on protein metabolism in Bolivian children. We measured protein utilization using leucine labeled with a stable isotope ((13)C) in two groups of healthy prepubertal children matched for age. Group 1 (n = 10) was examined at high altitude (HA) in La Paz (3600 m), and group 2 (n = 10) at low altitude (LA) in Santa Cruz (420 m). The nutritional status did not differ between groups but, as was to be expected, the HA group had higher hemoglobin concentration than the LA group. The children consumed casein that was intrinsically labeled with L-(1-(13)C) leucine and expired (13)CO(2) was analyzed. Samples of expired air were measured by isotope ratio mass spectrometer in Clermont-Ferrand. It was found that cumulative leucine oxidation ((13)CO(2)) at 300 min after ingestion was 19.7 +/- 4.9% at HA and 25.2 +/- 3.2% at LA. These results showed that protein absorption and/or utilization is significantly affected by altitude.

show abstract

Section: Figsupporting

confidence: 92%

Effect of High Altitude on Protein Metabolism in Bolivian Children

Miguel

Spielvogel²,

Berger³

et al. 2002

High Altitude Medicine & Biology

View full text Add to dashboard Cite

show abstract

“…Energy intake ranged from 1,266 to 5,348kcal/day, with an average of 2,390kcal/day, or 40.4kcal/kg/day, which is somewhat lower than that of Japanese (20) and the Japanese recommended allowances (1980). The mean daily energy intake, however, (13), and the hematocrit, hemoglobin concentration and serum protein concentration were significantly higher than those for normal Japanese (13). These data showed that these people are extremely well adapted to their low protein intake.…”

Section: Nutrient Intakesmentioning

confidence: 71%

“…The results of the nitrogen balance study and biochemical tests on blood specimens have been described elsewhere (13).…”

Section: Methodsmentioning

confidence: 99%

Nutritional status of Papua New Guinea Highlanders.

Okuda

Kajiwara

Date

et al. 1981

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

Self Cite

View full text Add to dashboard Cite

“…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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Studies on protein nutrition of Papua New Guinea highlanders: Nitrogen balance and hematological studies.

Cited by 12 publications

References 11 publications

Effect of High Altitude on Protein Metabolism in Bolivian Children

Effect of High Altitude on Protein Metabolism in Bolivian Children

Nutritional status of Papua New Guinea Highlanders.

Utilization of urea nitrogen in Papua New Guinea highlanders.

Contact Info

Product

Resources

About