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Contributions of gluconeogenesis to glucose production in the fasted state

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Landau, B R, Wahren, J, Chandramouli, V, Schumann, W C, Ekberg, K, Kalhan, S C·1996·Journal of Clinical Investigation

Abstract

Healthy subjects ingested 2H2O and after 14, 22, and 42 h of fasting the enrichments of deuterium in the hydrogens bound to carbons 2, 5, and 6 of blood glucose and in body water were determined. The hydrogens bound to the carbons were isolated in formaldehyde which was converted to hexamethylenetetramine for assay. Enrichment of the deuterium bound to carbon 5 of glucose to that in water or to carbon 2 directly equals the fraction of glucose formed by gluconeogenesis. The contribution of gluconeogenesis to glucose production was 47 +/- 49% after 14 h, 67 +/- 41% after 22 h, and 93 +/- 2% after 42 h of fasting. Glycerol's conversion to glucose is included in estimates using the enrichment at carbon 5, but not carbon 6. Equilibrations with water of the hydrogens bound to carbon 3 of pyruvate that become those bound to carbon 6 of glucose and of the hydrogen at carbon 2 of glucose produced via glycogenolysis are estimated from the enrichments to be approximately 80% complete. Thus, rates of gluconeogenesis can be determined without corrections required in other tracer methodologies. After an overnight fast gluconeogenesis accounts for approximately 50% and after 42 h of fasting for almost all of glucose production in healthy subjects.

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  • In the postabsorptive state, ~70-75% of glucose uptake occurs in insulin-insensitive tissues, with only ~25% in insulin-sensitive tissues.

    “In the postabsorptive state, the majority (∼70–75%) of glucose uptake (∼2 mg/kg per min) occurs in insulin-insensitive tissues (brain, erythrocytes, and splanchnic tissues) ( 17 , 18 ), with only ∼25% of glucose uptake occurring in insulin-sensitive tissues.”

    From Skeletal Muscle Insulin Resistance Is the Primary Defect in Type 2 Diabetes (2009) · cites this paper as [17]

    The Discussion (page unavailable) reports percentages for gluconeogenesis as a contribution to glucose production, not for glucose uptake by insulin-sensitive or insulin-insensitive tissues. Searches for the 70–75%/25% tissue split and the named tissues found no passage addressing that claim in our copy. (LLM, conf=0.76)

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  • Similar approaches focusing on a handful of metabolites have already been used successfully in humans to measure gluconeogenesis and the urea cycle in vivo, and to compare metabolism between lung tumors and surrounding tissue.

    “Similar approaches focusing on a handful of metabolites have already been used successfully in humans to measure gluconeogenesis and the urea cycle in vivo, and to compare metabolism between lung tumors and surrounding tissue (Fan et al., 2009; Landau et al., 1996; Yudkoff et al., 2010).”

    From Cellular Metabolism and Disease: What Do Metabolic Outliers Teach Us? (2012) · cites this paper as Landau et al., 1996

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Authors
Landau, B. R., Wahren, J., Chandramouli, V, Schumann, W. C., Ekberg, K., & Kalhan, S. C.
Affiliations
  • Case Western Reserve University (US)
  • Karolinska University Hospital (SE)
Venue
Journal of Clinical Investigation
Published
1996-07-15
Volume
98
Issue
2
Pages
378-385
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2040750115
Cited by
487
References
56
Citations by year
2026: 9 · 2025: 11 · 2024: 8 · 2023: 10 · 2022: 12 · 2021: 20 · 2020: 18 · 2019: 14 · 2018: 8 · 2017: 14 · 2016: 15 · 2015: 21 · 2014: 17 · 2013: 16 · 2012: 28
FWCI
9.37
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Riksbankens Jubileumsfond
  • National Institutes of Health (11089, HD-11089)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-14507)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P-50-HD-11089, P50HD011089)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
gluconeogenesis, glucose production, fasting, deuterium tracer, blood glucose, glycerol, glycogenolysis, pyruvate, glucose-6-phosphate
MeSH terms
Adult, Blood Glucose, Chromatography, High Pressure Liquid, Deuterium, Fasting, Female, Gluconeogenesis, Glucose, Glycerol, Humans, Male, Radioisotope Dilution Technique, Time Factors, Xylose

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