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Year : 2017  |  Volume : 130  |  Issue : 23  |  Page : 2829-2835

Safflower Extract and Aceglutamide Injection Promoting Recovery of Peripheral Innervations via Vascular Endothelial Growth Factor-B Signaling in Diabetic Mice

1 Department of Cardiology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China
2 Department of Medicine, The Hospital of 91208 Troops, PLA Navy, Qingdao, Shandong 266102, China

Correspondence Address:
Xia Li
Department of Cardiology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0366-6999.219143

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Background: Safflower extract and aceglutamide (SA) has been used clinically for the treatment of cerebrovascular diseases such as cerebral embolism, hemorrhage, and mental deterioration. This study aimed to investigate the effect and mechanism of SA injection in the recovery of peripheral innervations of diabetic mice. Methods: The C57BL/6 male mice were divided into four groups: normal control group (n = 44), diabetic group (n = 44), diabetic + SA group (diabetic mice treated with SA injection, n = 44), and diabetic + SA + vascular endothelial growth factor receptor (VEGFR)1-BL group (diabetic mice treated with SA injection and VEGFR 1 blocking antibody n = 24). The streptozotocin-induced diabetic mice model and injured peripheral nerve mice model were built. The mice with injured peripheral nerves were intraperitonealy administered with SA injection for successive 21 days. The corneal sensitivity, number of corneal nerve fibers, and contents of vascular endothelial growth factor (VEGF)-B and various neurotrophic factors such as nerve growth factor (NGF) and glial cell line-derived neurotrophic factor (GDNF) in corneal tissue of four groups were observed. Results: The diabetic group showed decreased number of corneal nerve fibers, compared with the control group (P = 0.002). And compared with the diabetic group, the diabetic + SA group showed a significant increase in the number of nerve fibers (P = 0.024) and the contents of VEGF-B, NGF, and GDNF in the cornea (all P < 0.05). However, when the diabetic mice were treated with the blocking antibodies specialized for VEGF-B receptor, the neutralization of VEGFR-1 completely abolished the increased expression of NGF and GDNF stimulated by SA injection. Conclusions: SA injection could reduce the nerve injury caused by diabetic peripheral neuropathy, and its protective effect might be associated with the promotion of the expressions of VEGF-B, NGF, and GDNF.

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