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Related Concept Videos

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Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
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Biochemical Measurement of Neonatal Hypoxia
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Modified forearm ischemic test in hypouricemic patients.

Ivan Sebesta1, Daisuke Miyamoto2, Blanka Stiburkova3

  • 1Department of Pediatrics and Adolescent Medicine, Institute of Medical Biochemistry and Laboratory Diagnostics, Charles University First Faculty of Medicine, Prague, Czech Republic.

Nucleosides, Nucleotides & Nucleic Acids
|April 22, 2020
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Summary

Renal hypouricemia can cause exercise-induced acute kidney injury. This study investigated low uric acid

Keywords:
Forearm ischemic testhereditary renal hypouricemiahereditary xanthinuriahypouricemiahypoxanthinelactate

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Area of Science:

  • Biochemistry
  • Exercise Physiology
  • Nephrology

Background:

  • Renal hypouricemia is linked to exercise-induced acute kidney injury (EIAKI) with unclear mechanisms.
  • Understanding hypouricemia's impact on energy metabolism is crucial for elucidating EIAKI pathogenesis.

Purpose of the Study:

  • To analyze the effects of low uric acid levels on energy metabolism during exercise.
  • To investigate the pathological conditions associated with hypouricemia.

Main Methods:

  • A modified semi-ischemic forearm exercise test was conducted on a healthy volunteer and patients with hypouricemia or xanthinuria.
  • Venous blood samples were collected pre-exercise and at multiple time points post-exercise.
  • Plasma lactate and hypoxanthine concentrations were measured to assess metabolic changes.

Main Results:

  • Plasma lactate levels increased significantly post-exercise, indicating metabolic stress.
  • Plasma hypoxanthine concentrations rose markedly after forearm ischemia, suggesting altered purine metabolism.
  • The exercise protocol effectively induced metabolic changes related to hypoxia and recovery.

Conclusions:

  • The modified forearm exercise test is a safe and effective method for studying metabolic responses to exercise in hypouricemic individuals.
  • This study provides insights into the metabolic alterations occurring in hypouricemia, potentially contributing to understanding EIAKI.
  • Further research is needed to fully elucidate the role of hypouricemia in EIAKI pathogenesis.