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1.贵州中医药大学,贵阳 550025
2.黑龙江中医药大学 第二临床医学院,哈尔滨 150006
3.西南医科大学 药学院,四川 泸州 646099
4.贵州中医药大学 第一附属医院,贵阳 550001
Received:07 August 2025,
Revised:2025-09-22,
Accepted:24 September 2025,
Online First:27 April 2026,
移动端阅览
WANG Fangfang, HU Qiqi, LIANG Dayi, et al. Mechanisms of Sargentodoxae Caulis in Alleviating Neuropathic Pain via Regulation of BDNF/TrkB/CaMKⅡ/CREB Signaling Pathway[J/OL]. Chinese Journal of Experimental Traditional Medical Formulae, 2026, 1-9.
WANG Fangfang, HU Qiqi, LIANG Dayi, et al. Mechanisms of Sargentodoxae Caulis in Alleviating Neuropathic Pain via Regulation of BDNF/TrkB/CaMKⅡ/CREB Signaling Pathway[J/OL]. Chinese Journal of Experimental Traditional Medical Formulae, 2026, 1-9. DOI: 10.13422/j.cnki.syfjx.20251939.
目的
2
基于网络药理学、分子对接结合动物实验,探究大血藤缓解神经病理性疼痛(NP)的作用机制。
方法
2
采用超高效液相色谱-四极杆-轨道阱高分辨质谱(UHPLC-Q-Orbitrap HRMS)技术鉴定大血藤的化学成分。通过网络药理学预测大血藤干预NP的核心靶点及相关通路。将48只SD大鼠随机分为假手术组,模型组,大血藤低、中、高剂量组(1.35、2.7、5.4 g·kg
-1
),普瑞巴林组(30 mg·kg
-1
)。制备NP慢性压迫性损伤(CCI)模型,分别于术前,术后3、5 d和药物干预后3、7、11、14 d测定各组大鼠机械缩足反射阈值(MWT)、热缩足反射阈值(TWL)。免疫荧光(IF)检测神经元兴奋性标志物细胞原癌基因fos(c-Fos)及中枢敏化所必需的神经激肽1受体(NK-1R)的表达。蛋白免疫印迹法(Western blot)检测脊髓组织中脑源性神经营养因子(BDNF)、原肌球蛋白受体激酶B(TrkB)、磷脂酶C
γ
(PLC
γ
)、钙/钙调蛋白依赖性蛋白激酶Ⅱ
α
(CaMKⅡ
α
)、cAMP反应元件结合蛋白(CREB)蛋白表达及磷酸化水平。IF检测脊髓组织磷酸化(p)-TrkB、p-PLC
γ
、p-CaMKⅡ
α
、p-CREB表达。
结果
2
大血藤含有138个化合物,经网络药理学研究发现其干预NP潜在作用靶点共409个,包括神经酪氨酸激酶受体2(NTRK2)、前列腺素过氧化物合酶2(PTGS2)、雷帕霉素靶蛋白(mTOR)、蛋白激酶1(Akt1)、丝裂原活化蛋白激酶1(MAPK1)等74核心靶点。分子对接结果显示,NTRK2(编码TrkB蛋白的基因)与红景天苷、青藤碱、葛根素、槲皮素、柚皮素、姜黄素等结合能力良好。动物行为学结果显示,与假手术组比较,模型组大鼠MWT、TWL均显著降低(
P
<
0.01)。IF结果显示,与假手术组比较,模型组脊髓组织中c-Fos与NK-1R表达显著增加(
P
<
0.01);与模型组比较,大血藤高剂量组脊髓组织中c-Fos与NK-1R表达显著降低(
P
<
0.01)。Western blot及IF荧光结果显示,与假手术组比较,模型组脊髓组织中BDNF、TrkB、p-TrkB、PLC
γ
、p-PLC
γ
、CaMKⅡ
α
、p-CaMKⅡ
α
、CREB、p-CREB
表达显著升高(
P
<
0.01);与模型组比较,大血藤高剂量组脊髓组织中以上蛋白表达显著降低(
P
<
0.01)。
结论
2
大血藤通过下调BDNF/TrkB/CaMKⅡ/CREB信号通路抑制神经元兴奋性及中枢敏化缓解神经病理性疼痛。
Objective
2
To explore the mechanisms of Sargentodoxae Caulis in relieving neuropathic pain (NP) based on network pharmacology, molecular docking, and animal experiments.
Methods
2
Ultra-performance liquid chromatography-quadrupole orbitrap high-resolution mass spectrometry (UHPLC-Q-Orbitrap HRMS) was used to identify the chemical constituents of Sargentodoxae Caulis. Network pharmacology was applied to predict the core targets and related pathways of Sargentodoxae Caulis in the intervention of NP. Forty-eight Sprague-Dawley (SD) rats were randomly divided into a sham operation group, a model group, low-, medium-, and high-dose Sargentodoxae Caulis groups (1.35, 2.7, and 5.4 g·kg
-1
), and a pregabalin group (30 mg·kg
-1
). A NP model was established using chronic constriction injury (CCI). The mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) were measured before surgery, on days 3 and 5 after surgery, and on days 3, 7, 11, and 14 after drug intervention. Immunofluorescence (IF) was used to detect the expression of neuronal excitability marker c-Fos and the neurokinin-1 receptor (NK-1R), which is essential for central sensitization. Western blot (WB) was used to detect the protein expression and phosphorylation levels of brain-derived neurotrophic factor (BDNF), tropomyosin receptor kinase B (TrkB), phospholipase C-
γ
(PLC
γ
), calcium/calmodulin-dependent protein kinase Ⅱ
α
(CaMKⅡ
α
), and cAMP-response element-binding protein (CREB) in spinal cord tissue. IF was further used to detect the expression of phosphorylated TrkB (p-TrkB), p-PLC
γ
, p-CaMKⅡ
α
, and p-CREB in spinal
cord tissue.
Results
2
A total of 138 compounds were identified in Sargentodoxae Caulis. Network pharmacology analysis revealed 409 potential targets for NP intervention, including 74 core targets such as neurotrophic tyrosine kinase receptor type 2 (NTRK2), prostaglandin-endoperoxide synthase 2 (PTGS2), mammalian target of rapamycin (mTOR), serine/threonine kinase 1 (Akt1), and mitogen-activated protein kinase 1 (MAPK1). Molecular docking results showed that NTRK2 (encoding TrkB) exhibited good binding affinity with salidroside, sinomenine, puerarin, quercetin, naringenin, and curcumin. Behavioral results showed that, compared with the sham group, MWT and TWL were significantly decreased in the model group (
P
<
0.01). IF results showed that c-Fos and NK-1R expression in spinal cord tissue was significantly increased in the model group compared with the sham group (
P
<
0.01), while these expression levels were significantly decreased in the high-dose Sargentodoxae Caulis group compared with the model group (
P
<
0.01). WB and IF results showed that, compared with the sham group, the expression levels of BDNF, TrkB, p-TrkB, PLC
γ
, p-PLC
γ
, CaMKⅡ
α
, p-CaMKⅡ
α
, CREB, and p-CREB were significantly increased in the model group (
P
<
0.01). Compared with the model group, these protein expression levels were significantly decreased in the high-dose Sargentodoxae Caulis group (
P
<
0.01).
Conclusion
2
Sargentodoxae Caulis alleviates NP by downregulating the BDNF/TrkB/CaMKⅡ/CREB signaling pathway, thereby inhibiting neuronal excitability and central sensitization.
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