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Significance of Transthyretin in Protein Metabolism
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Yves Ingenbleek
Veröffentlicht/Copyright:
1. Juni 2005
Abstract
Total body nitrogen (TBN) is mainly sequestered within the metabolically active lean body mass, in close relationship with total body potassium (TBK). TBN and TBK of growing children manifest superimposed accretion rates, display a sexual difference at the onset of adolescence and during adulthood, thereafter decreasing in elderly subjects. Plasma transthyretin (TTR) follows a comparable profile from birth to death in healthy individuals. Uncomplicated proteinenergy malnutrition primarily affects the activity of nitrogen metabolic pool, reducing protein syntheses to levels compatible with survival. This adaptive response is well identified by declining TTR concentrations. In various stressful conditions, in vivo responses are characterized by upregulation in injured regions and with muscle proteolysis exceeding protein synthesis, resulting in a net body negative nitrogen balance. Again, this evolutionary pattern mirrors that of plasma TTR. Attenuation of stress and/or introduction of nutritional rehabilitation allows restoration to normal of both TBN and TTR values that follow parallel slopes. Despite distinct etiopathogenic mechanisms, TTR concentrations appear to reflect the loss or gain of TBN in body pools and they predict later outcome in malnutrition and in conditions of acute and/or chronic inflammation.
:
Published Online: 2005-06-01
Published in Print: 2002-12-10
Copyright © 2002 by Walter de Gruyter GmbH & Co. KG
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Artikel in diesem Heft
- Author Index
- Subject Index
- Contents
- Historical Aspects and Perspectives in Transthyretin Research
- Transthyretin from Discovery to Now
- The Evolution of Transthyretin Synthesis in Vertebrate Liver, in Primitive Eukaryotes and in Bacteria
- The Evolution of Transthyretin Synthesis in the Choroid Plexus
- Hepatic Synthesis, Maturation and Complex Formation between Retinol-Binding Protein and Transthyretin
- Synthesis and Structural Analysis of the N-Terminal Domain of the Thyroid Hormone-Binding Protein Transthyretin
- Three-Dimensional Structure of the Transthyretin-Retinol-Binding Protein Complex
- Mechanisms of Molecular Recognition: Crystal Structure Analysis of Human and Rat Transthyretin Inhibitor Complexes
- Transthyretin in Fish: State of the Art
- The Effects of Endocrine-Disrupting Chemicals on Thyroid Hormone Binding to Xenopus laevis Transthyretin and Thyroid Hormone Receptor
- Clinical Picture and Outcome of Transthyretin-Related Familial Amyloid Polyneuropathy (FAP) in Japanese Patients
- Laboratory Assessment of Transthyretin Amyloidosis
- Amyloid: Morphology and Toxicity
- Historical Overview of Analytical Methods for the Measurement of Transthyretin
- Nutritional Regulation of Visceral Markers in Rat Liver and Cultured Hepatoma Cells
- Significance of Transthyretin in Protein Metabolism
- Transthyretin as a Thyroid Hormone Carrier: Function Revisited
- The Molar Ratio of Retinol-Binding Protein to Transthyretin in the Assessment of Vitamin A Status in Adults. Proposal of a Cut-off Point
- Observations with Regard to the National Kidney Foundation K/DOQI Clinical Practice Guidelines Concerning Serum Transthyretin in Chronic Renal Failure
- Metabolism and Clinical Interest of Serum Transthyretin (Prealbumin) in Dialysis Patients
- Protein Status in Pancreatitis – Transthyretin Is a Sensitive Biomarker of Malnutrition in Acute and Chronic Pancreatitis
- Assessment of Nutritional Status in Organ Transplant: Is Transthyretin a Reliable Indicator?
- Body Composition and Nutritional Parameters in HIV and AIDS Patients
- C-Reactive Protein to Transthyretin Ratio for the Early Diagnosis and Follow-up of Postoperative Infection
- The Prognostic Value of Nutritional and Inflammatory Indices in Critically Ill Patients with Acute Respiratory Failure
- Transthyretin: Its Response to Malnutrition and Stress Injury. Clinical Usefulness and Economic Implications
- Transthyretin Measurement as a Screening Tool for Protein Calorie Malnutrition in Emergency Hospital Admissions
- Outcomes of Continuous Process Improvement of a Nutritional Care Program Incorporating TTR Measurement
- The Role of Visceral Protein Markers in Protein Calorie Malnutrition
- Acknowledgement
- Meetings
Artikel in diesem Heft
- Author Index
- Subject Index
- Contents
- Historical Aspects and Perspectives in Transthyretin Research
- Transthyretin from Discovery to Now
- The Evolution of Transthyretin Synthesis in Vertebrate Liver, in Primitive Eukaryotes and in Bacteria
- The Evolution of Transthyretin Synthesis in the Choroid Plexus
- Hepatic Synthesis, Maturation and Complex Formation between Retinol-Binding Protein and Transthyretin
- Synthesis and Structural Analysis of the N-Terminal Domain of the Thyroid Hormone-Binding Protein Transthyretin
- Three-Dimensional Structure of the Transthyretin-Retinol-Binding Protein Complex
- Mechanisms of Molecular Recognition: Crystal Structure Analysis of Human and Rat Transthyretin Inhibitor Complexes
- Transthyretin in Fish: State of the Art
- The Effects of Endocrine-Disrupting Chemicals on Thyroid Hormone Binding to Xenopus laevis Transthyretin and Thyroid Hormone Receptor
- Clinical Picture and Outcome of Transthyretin-Related Familial Amyloid Polyneuropathy (FAP) in Japanese Patients
- Laboratory Assessment of Transthyretin Amyloidosis
- Amyloid: Morphology and Toxicity
- Historical Overview of Analytical Methods for the Measurement of Transthyretin
- Nutritional Regulation of Visceral Markers in Rat Liver and Cultured Hepatoma Cells
- Significance of Transthyretin in Protein Metabolism
- Transthyretin as a Thyroid Hormone Carrier: Function Revisited
- The Molar Ratio of Retinol-Binding Protein to Transthyretin in the Assessment of Vitamin A Status in Adults. Proposal of a Cut-off Point
- Observations with Regard to the National Kidney Foundation K/DOQI Clinical Practice Guidelines Concerning Serum Transthyretin in Chronic Renal Failure
- Metabolism and Clinical Interest of Serum Transthyretin (Prealbumin) in Dialysis Patients
- Protein Status in Pancreatitis – Transthyretin Is a Sensitive Biomarker of Malnutrition in Acute and Chronic Pancreatitis
- Assessment of Nutritional Status in Organ Transplant: Is Transthyretin a Reliable Indicator?
- Body Composition and Nutritional Parameters in HIV and AIDS Patients
- C-Reactive Protein to Transthyretin Ratio for the Early Diagnosis and Follow-up of Postoperative Infection
- The Prognostic Value of Nutritional and Inflammatory Indices in Critically Ill Patients with Acute Respiratory Failure
- Transthyretin: Its Response to Malnutrition and Stress Injury. Clinical Usefulness and Economic Implications
- Transthyretin Measurement as a Screening Tool for Protein Calorie Malnutrition in Emergency Hospital Admissions
- Outcomes of Continuous Process Improvement of a Nutritional Care Program Incorporating TTR Measurement
- The Role of Visceral Protein Markers in Protein Calorie Malnutrition
- Acknowledgement
- Meetings
