Abstract:
:Background Systemic lupus erythematosus (SLE) is an autoimmune disease marked by the disruption of the immune homeostasis. Patients exhibit a wide range of clinical manifestations, and environmental and genetic factors are involved in SLE pathogenesis. Evidence suggests that abnormalities in the cellular and molecular events that coordinate apoptosis may favour the generation of autoantigens involved in autoimmunity. In this way, the apoptotic deregulation may be affected by polymorphic variants in apoptotic-related genes. Methods We analyzed FAS, FASL, BCL-2 and BAX polymorphisms in order to correlate to SLE susceptibility and clinical features. A total of 427 SLE patients from the Hospital de Clínicas de Porto Alegre and 543 controls from southern Brazil were evaluated. Results We observed higher frequencies of the FASL -844CC genotype and -844C allele, as well as of the FASL-844C/IVS2nt-124A haplotype in African-derived SLE patients when compared to controls ( P < 0.001). FASL -844C, which is related to high FasL expression, could contribute to increased apoptosis and to the breakdown of immunological tolerance, favouring autoantibody production and inflammation. On the other hand, the BAX -248GA genotype and the -248A allele , related to low protein expression, were observed as a protective factor against SLE in this same population. The rate of apoptosis and cell death was evaluated in peripheral lymphocytes, and SLE patients presented a higher percentage of dead lymphocytes (CD3+Annexin V+ 7-AAD+) compared to the control group. Conclusion Our data support a role for apoptosis in SLE susceptibility.
journal_name
Lupusjournal_title
Lupusauthors
Glesse N,Vianna P,Paim LMG,Matte MCC,Aguiar AKK,Palhano PL,Monticielo OA,Brenol CV,Xavier RM,Chies JABdoi
10.1177/0961203316678671subject
Has Abstractpub_date
2017-06-01 00:00:00pages
746-755issue
7eissn
0961-2033issn
1477-0962pii
0961203316678671journal_volume
26pub_type
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