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Life Sci. 2019 Jan 1;216:227-232. doi: 10.1016/j.lfs.2018.11.054. Epub 2018 Nov 27.

Reduced TIPE2 expression is inversely associated with proinflammatory cytokines and positively correlated with bone mineral density in patients with osteoporosis.

Author information

1
Department of Clinical Laboratory, Yantai Affiliated Hospital of Binzhou Medical University, Yantai 264100, PR China.
2
Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, 54 Gongqingtuan Xi Road, Zibo 255036, PR China.
3
Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, 54 Gongqingtuan Xi Road, Zibo 255036, PR China. Electronic address: zbszxyyky@163.com.
4
Center of Translational Medicine, Zibo Central Hospital Affiliated to Shandong University, 54 Gongqingtuan Xi Road, Zibo 255036, PR China. Electronic address: bzjzzpq@163.com.

Abstract

AIMS:

The tumor necrosis factor (TNF)-alpha-induced protein 8-like 2 (TIPE2) participates in multiple inflammatory diseases. However, its underlying mechanism in osteoporosis has not been elucidated. The aim of current study is to preliminarily clarify the function of TIPE2 in the pathogenesis of osteoporosis.

MAIN METHODS:

TIPE2 expression in patients with osteoporosis was measured by Western blot and qRT-PCR methods. Proinflammatory cytokines including TNF-α, IL-1 and IL-6 were assessed via enzyme-linked immunosorbent assay. Serum fasting PINP and β-CTX were measured by the chemiluminescence method. Simple logistic regression analysis was performed for the odds ratio (OR) for TIPE2.

KEY FINDINGS:

TIPE2 expression in patients with osteoporosis was dramatically decreased and negatively correlated with proinflammatory cytokines. Furthermore, TIPE2 level was negatively correlated with fasting β-CTX, but not PINP, indicating that TIPE2 participates in the pathogenesis of osteoporosis dominantly by supression of bone resorption. Interestingly, TIPE2 expression level was positively correlated with bone mineral density (BMD), and its expression level can predict the risk of bone fracture using the simple logistic regression assay.

SIGNIFICANCE:

Our findings clarify that TIPE2 alleviates the pathogenesis of osteoporosis by suppressing the inflammatory status and the ability of TIPE2 for predicts bone fracture further demonstrated that TIPE2 might serve as a novel diagnostic marker and a therapeutic target for osteoporosis.

KEYWORDS:

BMD; Osteoporosis; Proinflammatory cytokines; TIPE2

PMID:
30496728
DOI:
10.1016/j.lfs.2018.11.054
[Indexed for MEDLINE]

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