Relationship between YKL-40 and pulmonary arterial hypertension in systemic sclerosis.

Abstract:

OBJECTIVES:Systemic sclerosis (SSc) is an intractable connective tissue disease that causes skin and organ fibrosis. Interstitial lung disease (ILD) and pulmonary arterial hypertension (PAH) affect its prognosis. YKL-40 protein impacts inflammation and tissue remodeling. Therefore, we evaluated the utility of YKL-40 blood levels in identifying patients with SSc complicated by PAH, as confirmed by immunohistochemistry (IHC) examination. METHODS:We retrospectively analyzed 78 patients with SSc and performed IHC on 7 normal and 7 SSc skin samples in the Japanese population. Age-adjusted YKL-40 serum levels were analyzed. RESULTS:YKL-40 age percentile was significantly elevated in SSc patients. There was no difference between patients with SSc with and without ILD and PAH. YKL-40 age percentile was greater in patients with PAH complication. YKL-40 immunostaining was negative in normal skin and prominent in the subcutaneous vascular wall of all SSc samples. Receiver operating characteristic (ROC) curve analysis indicated that YKL-40 age percentile correctly differentiated between patients with and without PAH with a sensitivity of 80% and a specificity of 94.1%. CONCLUSION:A higher YKL-40 level with PAH may be reflective of angiogenesis due to capillary injury in SSc. YKL-40 may offer a useful and easily applicable diagnostic biomarker of SSc complicated with PAH.

journal_name

Mod Rheumatol

journal_title

Modern rheumatology

authors

Furukawa T,Matsui K,Kitano M,Yokoyama Y,Sekiguchi M,Azuma N,Imai Y,Hirota S,Yamanishi K,Sano H

doi

10.1080/14397595.2018.1480256

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

476-483

issue

3

eissn

1439-7595

issn

1439-7609

journal_volume

29

pub_type

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