痛性糖尿病周围神经病变的低能量激光治疗：参数、机制与个体化策略

Photobiomodulation Therapy for Painful Diabetic Peripheral Neuropathy: Parameters, Mechanisms, and Individualized Strategies

摘要: 痛性糖尿病周围神经病变(PDPN)镇痛药物疗效有限且副作用突出。光生物调节疗法(PBM)无创多靶点，但疗效个体差异显著，根源是治疗参数繁杂无统一规范。本文梳理波长、能量密度、脉冲模式、治疗频次等参数作用机制，分析其对线粒体、氧化应激、神经炎症、离子通道及神经修复的调控作用，建立基于疼痛表型、神经损伤程度与合并症的个体化选参体系。现有证据表明800~1000 nm近红外光适配深部神经损伤，600~700 nm红光改善浅表微循环；能量密度有效窗口1~10 J/cm²，低频脉冲镇痛与安全性优于连续波。目前参数交互作用、糖尿病组织光学改变等问题尚不明确，高质量临床研究不足。本文汇总现有理论，为PDPN个体化精准光疗提供依据并提出后续研究方向。

Abstract: Analgesic drugs for painful diabetic peripheral neuropathy (PDPN) offer limited efficacy and prominent side effects. Photobiomodulation (PBM) therapy is a non-invasive, multi-targeted approach; however, its efficacy exhibits significant individual variability, primarily due to the complexity of treatment parameters and a lack of unified protocols. This article reviews the mechanisms of action of key parameters—including wavelength, energy density, pulse mode, and treatment frequency, and analyzes their regulatory effects on mitochondria, oxidative stress, neuroinflammation, ion channels, and nerve repair. Furthermore, it establishes an individualized parameter selection system based on pain phenotypes, the degree of nerve injury, and comorbidities. Current evidence suggests that 800~1000 nm near-infrared light is optimal for deep nerve injuries, whereas 600~700 nm red light improves superficial microcirculation. The effective window for energy density is 1~10 J/cm², with low-frequency pulsed light demonstrating superior analgesic effects and safety compared to continuous wave modes. At present, issues such as the interaction between parameters and the optical changes in diabetic tissues remain largely unclear, alongside a deficit of high-quality clinical studies. This article synthesizes existing theories to provide a foundation for personalized, precision phototherapy for PDPN and outlines directions for future research.