Title:Serum Irisin is Associated with Bone Mineral Density in Postmenopausal
T2dm Patients Complicated with Osteoporosis and in Mice with Diabetic
Osteoporosis
Volume: 24
Issue: 4
Author(s): Xiuxiu Hou, Baorui Xing*, Guochen Zhang, Hao Wu, Nana Feng, Yunmei Li and Guangpu Han
Affiliation:
- Department of Hip Trauma Orthopedics, Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western
Medicine, Cangzhou, 061000, Hebei, China
Keywords:
T2DM, osteoporosis, irisin, mice, patients, BMD, streptozotocin.
Abstract:
Background: Osteoporosis is a systemic bone disease with low bone mass, destruction of
bone microstructure, and increased bone fragility. Gender and metabolic status are well-known risk
factors for osteoporosis. Irisin is a newly discovered myokine that is secreted by skeletal muscle and
adipose tissue. Serum Irisin was reported to be decreased in type 2 diabetes mellitus (T2DM) and/or
osteoporosis patients, and it is correlated with bone mineral density (BMD) of neck bone, but its role in
postmenopausal T2DM with osteoporosis remains largely unknown.
Methods: Postmenopausal T2DM patients with or without osteoporosis were recruited, and 50 agematched
healthy postmenopausal women were employed as healthy control. C57BL/6J mice were intraperitoneally
injected with 65 mg/kg Streptozotocin (STZ) daily for consecutive 5 days to induce
diabetes, and 1 mg/kg recombinant Irisin protein was injected into diabetic mice through the tail vein
once a week for 4 months.
Results: Compared to that of healthy control, serum Irisin levels and BMD in L1–L4 lumbar spine,
femoral neck, total hip, and Wards were decreased in postmenopausal T2DM patients and further decreased
in T2DM patients with osteoporosis. Moreover, serum Irisin levels were also correlated with
BMD in the above body parts in T2DM patients. Furthermore, recombinant Irisin protein improved
diabetic osteoporosis and inflammation in STZ-induced diabetic mice with osteoporosis.
Conclusion: Serum Irisin levels in postmenopausal T2DM patients with osteoporosis were significantly
decreased, which may be related to the decreased BMD and the occurrence of osteoporosis in postmenopausal
T2DM patients. The combined measurement of serum Irisin levels and BMD in patients
with T2DM in the early stage has a certain effect on the diagnosis and treatment of osteoporosis.