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[Adenosine deaminase]

N Kurata1

  • 1Asiro National Health Insurance Clinic.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|May 1, 1995
PubMed
Summary
This summary is machine-generated.

Adenosine deaminase (ADA) levels and its isozymes, ADA1 and ADA2, differ in human tissues and serum. Elevated ADA levels indicate various diseases, with specific isozymes linked to distinct conditions.

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Area of Science:

  • Biochemistry
  • Immunology
  • Clinical Chemistry

Background:

  • Adenosine deaminase (ADA) is an enzyme crucial for purine metabolism, primarily found in lymphoid tissues.
  • Two main isozymes, ADA1 and ADA2, exist, with ADA1 predominant in tissues and ADA2 in serum.

Purpose of the Study:

  • To investigate the distribution of ADA isozymes in human tissues and serum.
  • To correlate serum ADA levels and isozyme concentrations with various disease states.

Main Methods:

  • Analysis of adenosine deaminase activity and isozyme composition in human tissue extracts and serum samples.
  • Comparison of ADA levels in healthy individuals versus patients with hepatic, hematological, and infectious diseases.

Main Results:

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  • ADA1 was the predominant isozyme in human tissue extracts.
  • ADA2 was the main component of serum ADA.
  • Elevated total ADA activity was observed in patients with hepatic diseases, hematological malignancies, and infectious diseases.
  • Serum ADA1 levels were high in acute leukemias and acute liver injury.
  • Serum ADA2 levels were elevated in adult T-cell leukemia, multiple myeloma, infectious mononucleosis, rubella, AIDS, chronic hepatic diseases, and tuberculosis.

Conclusions:

  • Serum ADA isozyme patterns can serve as potential biomarkers for specific diseases.
  • ADA1 elevation may suggest tissue injury, while ADA2 elevation might indicate T-cell stimulation.