骨科药物筛选确定盐酸雷洛昔芬为一种用于脊髓损伤治疗的新型铁死亡抑制剂。

Screening of orthopedic medicines identifies raloxifene hydrochloride as a novel ferroptosis inhibitor for spinal cord injury therapy.

作者信息

Su Shenkai, Wu Xuanzhang, Zhu Yuxuan, Yang Shu, Lu Keyu, Zhang Xiaolei, Zhang Di, Wang Xiangyang

机构信息

Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China; Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, Zhejiang Province, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China.

Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China; Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, Zhejiang Province, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China.

出版信息

Int Immunopharmacol. 2024 Dec 25;143(Pt 3):113542. doi: 10.1016/j.intimp.2024.113542. Epub 2024 Nov 6.

Abstract

Spinal cord injury (SCI) is a severe condition that can lead to irreversible central nervous system damage. Spinal cord injury patients frequently present with coexisting orthopedic conditions, and many of them also have underlying bone and joint diseases. Recent studies have identified ferroptosis as a significant contributor that exacerbates the progression of spinal cord injury. This study conducted a screening in common orthopedic medications, which includes anti-osteoporosis agents and calcium supplements, in order to identify potential ferroptosis inhibitors and investigate their therapeutic effects on spinal cord injury. Among the 8 drugs screened, raloxifene hydrochloride was found to significantly inhibit ferroptosis induced by RSL3 in neural cells. Subsequent studies confirmed its inhibitory effect on ferroptosis both in vitro and in vivo. It was also demonstrated that Nrf2 inhibitor Brusatol could reverse the anti-ferroptotic effect of Raloxifene hydrochloride in neural cells in vitro as well as its therapeutic effect on SCI in vivo, suggesting its inhibitory effect on ferroptosis is through Nrf2. This study identifies a novel ferroptosis inhibitor among orthopedic medicines and also confirms the therapeutic effect of Raloxifene hydrochloride on SCI. The results of the current study may provide reference for the clinical administration of SCI.

摘要

脊髓损伤(SCI)是一种严重的病症,可导致不可逆的中枢神经系统损伤。脊髓损伤患者常伴有骨科疾病,其中许多人还患有潜在的骨与关节疾病。最近的研究已确定铁死亡是加剧脊髓损伤进展的一个重要因素。本研究对包括抗骨质疏松药物和钙补充剂在内的常见骨科药物进行了筛选,以确定潜在的铁死亡抑制剂,并研究它们对脊髓损伤的治疗效果。在筛选的8种药物中,发现盐酸雷洛昔芬能显著抑制RSL3诱导的神经细胞铁死亡。随后的研究证实了其在体外和体内对铁死亡的抑制作用。还证明Nrf2抑制剂布罗索尤单抗可在体外逆转盐酸雷洛昔芬对神经细胞铁死亡的抗作用以及其在体内对脊髓损伤的治疗作用,表明其对铁死亡的抑制作用是通过Nrf2实现的。本研究在骨科药物中鉴定出一种新型铁死亡抑制剂,并证实了盐酸雷洛昔芬对脊髓损伤的治疗效果。本研究结果可为脊髓损伤的临床用药提供参考。

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