DKK-1 in psoriatic arthritis: Correlation with disease activity and enthesopathy.

BACKGROUND: Psoriatic arthritis (PsA) is a complex inflammatory disease with varied clinical characteristics. A pathognomonic characteristic of PsA is enthesitis. Entheseal inflammation ultimately leads to the production of new bone (enthesophytes). Dickkopf-related protein-1 (DKK-1) is a wingless (Wnt) inhibitor that inhibits osteoblast function. OBJECTIVES: Assessment of the serum level of DKK-1 and its association with disease activity and enthesopathy in PsA patients. METHODS: This observational case-control study included 50 PsA patients and 50 healthy volunteers matched for age and gender. All participants were subjected to full medical history, clinical assessment, PSA activity using Disease Activity Index for Psoriatic Arthritis (DAPSA) score, the severity and extent of psoriasis were determined by the Psoriasis Area and Severity Index (PASI). Ultrasonographic assessment of the entheses was done in accordance with the Madrid Sonographic Enthesitis Index (MASEI). Serum level of DKK-1 and correlation with disease activity and enthesopathy in PsA patients were assessed. RESULTS: There was no significant difference between patients and controls regarding age and sex. The mean value of SPARCC index, DAPSA score and PASI score were 6.74±4.58, 33.24±15.26, and 8.35±10.93, respectively. There was significant difference between patients and controls regarding the serum levels of DKK-1 and MASEI score (p<0.0001). There was a significant positive correlation between serum DKK-1 and MASEI (r: 0.43527, p: 0.00158), MASEI inflammatory (r: 0.37958, p: 0.00655), and MASEI damage (r: 0.38384, p: 0.00593). CONCLUSIONS: Serum DKK-1 levels were elevated in PsA patients and were found to be correlated with MASEI score for enthesopathy.

DKK-1 in psoriatic arthritis: Correlation with disease activity and enthesopathy / DKK-1 en artritis psoriásica: correlación con la actividad de la enfermedad y la entesopatía

Background: Psoriatic arthritis (PsA) is a complex inflammatory disease with varied clinical characteristics. A pathognomonic characteristic of PsA is enthesitis. Entheseal inflammation ultimately leads to the production of new bone (enthesophytes). Dickkopf-related protein-1 (DKK-1) is a wingless (Wnt) inhibitor that inhibits osteoblast function. Objectives: Assessment of the serum level of DKK-1 and its association with disease activity and enthesopathy in PsA patients. Methods: This observational case–control study included 50 PsA patients and 50 healthy volunteers matched for age and gender. All participants were subjected to full medical history, clinical assessment, PSA activity using Disease Activity Index for Psoriatic Arthritis (DAPSA) score, the severity and extent of psoriasis were determined by the Psoriasis Area and Severity Index (PASI). Ultrasonographic assessment of the entheses was done in accordance with the Madrid Sonographic Enthesitis Index (MASEI). Serum level of DKK-1 and correlation with disease activity and enthesopathy in PsA patients were assessed. Results: There was no significant difference between patients and controls regarding age and sex. The mean value of SPARCC index, DAPSA score and PASI score were 6.74±4.58, 33.24±15.26, and 8.35±10.93, respectively. There was significant difference between patients and controls regarding the serum levels of DKK-1 and MASEI score (p<0.0001). There was a significant positive correlation between serum DKK-1 and MASEI (r: 0.43527, p: 0.00158), MASEI inflammatory (r: 0.37958, p: 0.00655), and MASEI damage (r: 0.38384, p: 0.00593). Conclusions: Serum DKK-1 levels were elevated in PsA patients and were found to be correlated with MASEI score for enthesopathy.(AU)

Antecedentes: La artritis psoriásica (APs) es una enfermedad inflamatoria compleja con características clínicas variadas. Una característica patognomónica de la artritis psoriásica es la entesitis. La inflamación entesófila finalmente conduce a la producción de hueso nuevo (entesófitos). La proteína 1 relacionada con dickkopf (DKK-1) es un inhibidor sin alas (Wnt) que inhibe la función de los osteoblastos. Objetivos: Evaluación del nivel sérico de DKK-1 y su asociación con la actividad de la enfermedad y la entesopatía en pacientes con APs. Métodos: Este estudio observacional de casos y controles; incluyó a 50 pacientes con artritis psoriásica y 50 voluntarios sanos emparejados por edad y sexo. Todos los participantes fueron sometidos a historia clínica completa, evaluación clínica, actividad de APs utilizando la puntuación del Índice de Actividad de la Enfermedad para la Artritis Psoriásica (DAPSA), la gravedad y la extensión de la psoriasis fueron determinadas por el área de psoriasis y el índice de gravedad (PASI). La evaluación ultrasonográfica de las entesis se realizó de acuerdo con el índice de entesitis sonográfica de Madrid (MASEI). Se evaluó el nivel sérico de DKK-1 y la correlación con la actividad de la enfermedad y la entesopatía en pacientes con artritis psoriásica. Resultados: No hubo diferencias significativas entre los pacientes y los controles con respecto a la edad y el sexo. El valor medio del índice SPARCC, la puntuación DAPSA y la puntuación PASI fueron 6,74±4,58, 33,24±15,26 y 8,35±10,93 respectivamente. Hubo diferencia significativa entre pacientes y controles con respecto a los niveles séricos de DKK-1 y la puntuación MASEI (p <0,0001). Hubo correlación positiva significativa entre DKK-1 sérico y MASEI (r: 0,43527, p = 0,00158), y daño MASEI (r: 0.38384, p = 0,00593). Conclusiones: Los niveles séricos de DKK-1 se elevaron en pacientes con APs y se encontró que estaban correlacionados con la puntuación MASEI para la entesopatía.(AU)