2016, Number 4
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Ann Hepatol 2016; 15 (4)
Elevated circulating levels of IL-21 and IL-22 define a cytokine signature profile in type 2 autoimmune hepatitis patients
Thomas-Dupont P, Remes-Troche JM, Izaguirre-Hernández IY, Sánchez-Vargas LA, Maldonado-Rentería MJ, Hernández-Flores KG, Torre A, Bravo-Sarmiento E, Vivanco-Cid H
Language: English
References: 35
Page: 550-558
PDF size: 593.62 Kb.
ABSTRACT
Background and aims. Autoimmune hepatitis (AIH) is a chronic inflammatory condition of the liver in which the immunological
mechanisms involved in tissue destruction and/or repair are still unclear. Different pro-inflammatory cytokines have been shown to
play a determinant role in AIH pathogenesis. Here, we aim to compare the circulating levels of pro- and anti-inflammatory cytokines
such as IL-6, TNF-α, IL-17A/F, IL-21, IL-22, IL-23, and IL-10 in patients with type 2 AIH compared to patients with type 1 AIH and
healthy controls (HC). Fourty-six Mexican patients with AIH were recruited in our study. Patients were classified as type 1 or 2 AIH
based on immune serological markers. Fourty-four serum samples from healthy individuals were included as controls. Serum cytokine
levels were determined by ELISA technique.
Results. Compared to healthy controls, serum levels of IL-17F, IL-21, IL-23,
IL-10, IL-6, and TNF-α, but not IL-17A and IL-22, were significantly increased in AIH patients. When patients were grouped by aminotransferase
activity, a biomarker of active disease, a positive correlation between serum IL-17F and alanine transaminase
(rs: 0.4739; P = 0.0009) and aspartate transaminase (rs: 0.4984; P = 0.0004) levels was found. A cytokine signature profile associated
with type 2 AIH was characterized by high serum IL-21 (type 1 AIH: 0.66 pg/mL; type 2 AIH: 331.1 pg/mL; P = 0.0042) and
IL-22 (type 1 AIH: 0.1 pg/mL; type 2 AIH: 55.26 pg/mL; P = 0.0028) levels.
Conclusions. We show for the first time, differential
regulation of certain pro-inflammatory cytokines associated with disease progression and AIH type in Mexican patients.
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