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Vasseur C, Domingues-Hamdi E, Pakdaman S, Galactéros F, Baudin-Creuza V. Alpha haemoglobin-stabilising protein concentration in the red blood cells of patients with sickle cell anaemia with and without hydroxycarbamide treatment. Br J Haematol 2021; 196:183-192. [PMID: 34378186 DOI: 10.1111/bjh.17728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 07/02/2021] [Accepted: 07/12/2021] [Indexed: 11/27/2022]
Abstract
Alpha haemoglobin-stabilising protein (AHSP) is a key chaperone synthesised in red blood cell (RBC) precursors. Many studies have reported AHSP as a potential biomarker of various diseases. AHSP gene expression has been studied in detail, but little is known about AHSP protein levels in RBCs. We investigated the AHSP concentration of RBC lysates from control subjects (n = 10) and patients with sickle cell anaemia (SCA) with (n = 10) and without (n = 12) hydroxycarbamide (HC) treatment, to evaluate the clinical relevance of AHSP in SCA. We developed a sandwich enzyme-linked immunosorbent assay method, with which we were able, for the first time, to determine the mean AHSP concentration in control RBC lysates (0·82 µg/ml). The AHSP concentration (2·23 µg/ml) was significantly higher in untreated patients with the SS genotype than in controls. The AHSP concentration decreased significantly on HC treatment (1·50 µg/ml) but remained significantly higher than that in controls. A strong positive correlation was observed between the AHSP concentration and the α-haemoglobin pool with the three groups of subjects pooled into a single group. Our present findings indicate that AHSP concentration can be considered a candidate biomarker for monitoring HC responses in patients with SCA and suggest a role for AHSP in various RBC diseases.
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Affiliation(s)
- Corinne Vasseur
- Inserm U955-IMRB Team Pirenne, Univ Paris Est Créteil, Créteil, France.,Laboratory of Excellence GR-Ex, Paris, France
| | - Elisa Domingues-Hamdi
- Inserm U955-IMRB Team Pirenne, Univ Paris Est Créteil, Créteil, France.,Laboratory of Excellence GR-Ex, Paris, France
| | - Sadaf Pakdaman
- Inserm U955-IMRB Team Pirenne, Univ Paris Est Créteil, Créteil, France.,Laboratory of Excellence GR-Ex, Paris, France.,Etablissement Français du Sang (EFS) Ile de France-Mondor, Créteil, France
| | - Frédéric Galactéros
- Inserm U955-IMRB Team Pirenne, Univ Paris Est Créteil, Créteil, France.,Laboratory of Excellence GR-Ex, Paris, France.,Unité des Maladies Génétiques du Globule Rouge, Hôpital Universitaire Henri Mondor (AP-HP), Créteil, France
| | - Véronique Baudin-Creuza
- Inserm U955-IMRB Team Pirenne, Univ Paris Est Créteil, Créteil, France.,Laboratory of Excellence GR-Ex, Paris, France
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