Features of peripheral CD8+CD57+ lymphocytes in patients with autoimmune hemolytic anemia

Maria Celeste Fatone, Fabio Pavone, Gianfranco Lauletta, Sabino Russi

Research output: Contribution to journalArticlepeer-review

Abstract

Autoimmune hemolytic anemia (AIHA) is an acquired condition characterized by the presence of autoantibodies recognizing erythrocyte-related antigens. Several components of the immune system are involved in disease pathogenesis. Among them, as for other autoimmune disorders, a role for specific CD8+CD57+ regulatory cells subset could be hypothesized. We evaluated this lymphocyte subset by flow cytometry in 18 AIHA patients randomly selected in a retrospective population of 29 cases. Secondary forms were observed in 65.5% of cases, whereas frequencies of warm, cold, mixed, and atypical forms were similar. Cold agglutinins and cryoglobulins tested positive in 44.8% and 10.3% of cases, respectively. These patients exhibited a higher frequency of peripheral vascular symptoms (odds ratio = 8.2, p =.04) and complement consumption (odds ratio = 7.2, p =.02). Frequency of CD8+CD57+ cells resulted significantly higher in AIHA patients than in control group (17.0 ± 15.8% vs 8.2 ± 5.0%, p =.04). Regardless of therapeutic schedule, patients with partial or no response to therapy (8/18) showed higher frequencies of CD8+CD57+ cells as compared with controls (23.6 ± 21.3% vs 8.9 ± 4.9%, p =.01), whereas 10/18 complete responders (CR) showed lower levels of CD8+CD57+ cells (11.7 ± 6.9%, p =.11). CR and controls showed similar values (p =.24). This study suggests that monitoring this lymphocyte subset before and after treatment administration might have a prognostic value. Moreover, CD8+CD57+ cells may represent a possible therapeutic target to restore the normal balance between lymphocyte populations.

Original languageEnglish
Pages (from-to)166-174
Number of pages9
JournalAutoimmunity
Volume51
Issue number4
DOIs
Publication statusPublished - May 19 2018

Keywords

  • autoimmune disease
  • Autoimmune hemolytic anemia
  • CD8CD57 cells
  • flow cytometry
  • immune senescence

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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