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Disorders of Erythrocytes01:27

Disorders of Erythrocytes

Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
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Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
07:42

Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics

Published on: February 19, 2017

Hereditary red cell membrane disorders and laboratory diagnostic testing.

M-J King1, A Zanella

  • 1Membrane Biochemistry, NHS Blood and Transplant, Bristol, UK. may-jean.king@nhsbt.nhs.uk

International Journal of Laboratory Hematology
|March 14, 2013
PubMed
Summary

This overview details nonimmune hereditary hemolytic anemias, focusing on red blood cell membrane protein defects. Diagnostic challenges exist, with current tests for hereditary spherocytosis and related disorders showing limitations.

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Published on: January 2, 2013

Area of Science:

  • Hematology
  • Genetics
  • Biochemistry

Background:

  • Nonimmune hereditary hemolytic anemias stem from red blood cell membrane protein defects.
  • These disorders affect distinct layers of the red cell membrane, impacting cellular integrity.
  • Key conditions include hereditary spherocytosis (HS), hereditary elliptocytosis (HE), and hereditary stomatocytosis.

Purpose of the Study:

  • To provide an overview of hereditary hemolytic anemias caused by red cell membrane protein defects.
  • To discuss current diagnostic screening tests and their limitations for HS, HE, and hereditary stomatocytosis.
  • To highlight the need for improved diagnostic strategies for these inherited red blood cell disorders.

Main Methods:

  • Review of existing literature and diagnostic approaches for hereditary hemolytic anemias.
  • Analysis of current laboratory screening tests for HS, including osmotic fragility, AGLT, cryohemolysis, and EMA-binding tests.
  • Discussion of diagnostic methods for HE/HPP (morphology, gel electrophoresis) and hereditary stomatocytosis (clinical presentation, limited testing).

Main Results:

  • Current screening tests for HS are not exhaustive, necessitating combinations like AGLT and EMA tests in some centers.
  • Diagnosis of HE/HPP relies on morphology and specific protein analysis (4.1R, spectrin).
  • No specific screening test exists for hereditary stomatocytosis; diagnosis is suggested by compensated hemolytic anemia, macrocytosis, and pseudohyperkalemia.

Conclusions:

  • Diagnostic limitations persist for hereditary hemolytic anemias, particularly for hereditary stomatocytosis.
  • The eosin-5'-maleimide (EMA)-binding test and osmotic fragility test may aid in differentiating HS from hereditary stomatocytosis.
  • Further development of sensitive and specific diagnostic tools is crucial for accurate identification and management of these anemias.