Clinical and experimental rheumatology · 2021
Amylin serum levels are upregulated in patients with systemic lupus erythematosus.
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Quevedo-Abeledo Juan Carlos, Hernández-Díaz Marta, Sánchez-Pérez Hiurma, Medina-Vega Lilian, González-Rivero Agustín F, Almeida-Santiago Cristina, de Armas-Rillo Laura, González-Gay Miguel Ángel, Ferraz-Amaro Iván
Аннотация
OBJECTIVES: Amylin is a pancreatic hormone that participates in glucose homeostasis. We aimed to investigate how serum amylin levels are expressed in patients with systemic lupus erythematosus (SLE) compared to matched controls, and their possible relationship to disease-related characteristics, such as activity or damage.
METHODS: 144 SLE patients and 96 non-diabetic sex- (female 96% vs. 91%, p=0.43) and age-matched controls (49±11 vs. 51±8 years, p=0.09) were included. Amylin, insulin and C-peptide serum levels, as well as insulin resistance indexes were assessed in both groups. Multivariable regression analysis was performed to compare amylin between groups and to explore its interrelations with SLE features. The analyses were adjusted for glucocorticoids intake and for insulin resistance classic risk factors.
RESULTS: Patients with SLE exhibited significant higher serum levels of amylin when compared to controls after multivariable analysis (beta coef. 1.56 [95%CI 1.01-2.11], p=0.000). Moreover, SLE patients not on prednisone (beat coef. 1.54 [95%CI 0.98-2.10] ng/ml, p=0.000) and those on prednisone (beta coef. 1.51 [95%CI 0.96-2.07] ng/ml, p=0.000) disclosed higher amylin serum levels compared to controls in the fully multivariable analysis. Hyperamylinaemia in SLE patients remained significant even adjusting for differences in the insulin resistance and beta cell production rates between patients and controls. The damage produced by the disease and its severity were independently and positively associated with amylin serum levels.
CONCLUSIOINS: Amylin is upregulated in SLE patients compared to controls, regardless of the insulin resistance that SLE may present. The damage produced by the disease and its severity independently explains this upregulation.
METHODS: 144 SLE patients and 96 non-diabetic sex- (female 96% vs. 91%, p=0.43) and age-matched controls (49±11 vs. 51±8 years, p=0.09) were included. Amylin, insulin and C-peptide serum levels, as well as insulin resistance indexes were assessed in both groups. Multivariable regression analysis was performed to compare amylin between groups and to explore its interrelations with SLE features. The analyses were adjusted for glucocorticoids intake and for insulin resistance classic risk factors.
RESULTS: Patients with SLE exhibited significant higher serum levels of amylin when compared to controls after multivariable analysis (beta coef. 1.56 [95%CI 1.01-2.11], p=0.000). Moreover, SLE patients not on prednisone (beat coef. 1.54 [95%CI 0.98-2.10] ng/ml, p=0.000) and those on prednisone (beta coef. 1.51 [95%CI 0.96-2.07] ng/ml, p=0.000) disclosed higher amylin serum levels compared to controls in the fully multivariable analysis. Hyperamylinaemia in SLE patients remained significant even adjusting for differences in the insulin resistance and beta cell production rates between patients and controls. The damage produced by the disease and its severity were independently and positively associated with amylin serum levels.
CONCLUSIOINS: Amylin is upregulated in SLE patients compared to controls, regardless of the insulin resistance that SLE may present. The damage produced by the disease and its severity independently explains this upregulation.