title: Changes in neurotrophic and inflammatory factors in the cerebrospinal fluid of patients with postherpetic neuralgia.
abstract: Inflammatory and neurotrophic factors are involved in postherpetic neuralgia (PHN), but the association of these factors in the cerebrospinal fluid (CSF) with the level of pain is poorly known. The present study aimed to examine the changes in neurotrophic and inflammatory factors in the CSF of patients with PHN and to study the correlation between these factors and the degree of pain. Fifty patients with PHN and 28 patients with hemifacial spasm (as controls) were recruited between May 2015 and March 2016. CSF levels of inflammatory and neurotrophic factors were measured by ELISA. Compared with controls, patients with PHN had lower CSF levels of brain-derived neurotrophic factor (BDNF), nerve growth factor (NGF), neurotrophin (NT)-3, NT-5, and P substance (all P<0.05), and higher CSF levels of interleukin (IL)-1β (P=0.050). Among patients with PHN, CSF BDNF levels were positively correlated to IL-8 (rs=0.229, P=0.04); glial cell line-derived neurotrophic factor (GDNF) levels to IL-8 (rs=0.326, P=0.004) levels; NGF levels to tumor necrosis factor (TNF)-α levels (rs=0.229, P=0.044); NT-3 levels to IL-1β (rs=0.228, P=0.045); and NT-5 levels to IL-8 (rs=0.388, P<0.001), and TNF-α (rs=0.445, P<0.001) levels. Inflammatory and neurotrophic factors were not correlated with the visual analog scale score and von Frey. Multivariable linear regression showed PHN was associated with NGF (P=0.038) and BDNF (P=0.029), independently from age and major medical history. In conclusion, patients with PHN showed low levels of BDNF, NGF, NT-3, and NT-5. Among patients with PHN, CSF levels of neurotrophic factors positively correlated with inflammatory factors.
authors.affiliation: Laboratory of Medical Cell Biology, College of Translational Medicine, China Medical University, Shenyang, China; Department of Anesthesiology, Pain Medicine &CCM Aviatioin, General Hospital of China Medical University, Beijing, China.
authors.forename: Wenxing
authors.initials: W
authors.lastname: Zhao
authors.affiliation: Department of Anesthesiology, Pain Medicine &CCM Aviatioin, General Hospital of China Medical University, Beijing, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Anesthesiology, Pain Medicine &CCM Aviatioin, General Hospital of China Medical University, Beijing, China.
authors.forename: Qiwu
authors.initials: Q
authors.lastname: Fang
authors.affiliation: Department of Anesthesiology, Pain Medicine &CCM Aviatioin, General Hospital of China Medical University, Beijing, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Anesthesiology, Pain Medicine &CCM Aviatioin, General Hospital of China Medical University, Beijing, China.
authors.forename: Xinyou
authors.initials: X
authors.lastname: Gao
authors.affiliation: Department of Anesthesiology, Pain Medicine &CCM Aviatioin, General Hospital of China Medical University, Beijing, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.affiliation: Laboratory of Medical Cell Biology, College of Translational Medicine, China Medical University, Shenyang, China. Electronic address: caoliu@mail.cmu.edu.cn.
authors.forename: Liu
authors.initials: L
authors.lastname: Cao
authors.affiliation: Department of Anesthesiology, Pain Medicine &CCM Aviatioin, General Hospital of China Medical University, Beijing, China. Electronic address: anjianxiong@yahoo.com.
authors.forename: Jianxiong
authors.initials: J
authors.lastname: An
mesh_terms: D000368:Aged; D019208:Brain-Derived Neurotrophic Factor / Q000134:cerebrospinal fluid; D005260:Female; D006801:Humans; D007249:Inflammation / Q000134:cerebrospinal fluid*; D053583:Interleukin-1beta / Q000134:cerebrospinal fluid; D016209:Interleukin-8 / Q000134:cerebrospinal fluid; D008297:Male; D008875:Middle Aged; D020932:Nerve Growth Factor / Q000134:cerebrospinal fluid; D051474:Neuralgia, Postherpetic / Q000134:cerebrospinal fluid*; D020933:Neurotrophin 3 / Q000134:cerebrospinal fluid
chemical_list: D019208:Brain-Derived Neurotrophic Factor; C508606:CXCL8 protein, human; D053583:Interleukin-1beta; D016209:Interleukin-8; C502240:NGF protein, human; D020933:Neurotrophin 3; C579455:BDNF protein, human; D020932:Nerve Growth Factor
keywords: Cerebrospinal fluid; Inflammatory factors; Neurotrophic factors; Postherpetic neuralgia