PMID- 29408929 OWN - NLM STAT- MEDLINE DCOM- 20180402 LR - 20220408 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 13 IP - 2 DP - 2018 TI - Cytokine-mediated inflammation mediates painful neuropathy from metabolic syndrome. PG - e0192333 LID - 10.1371/journal.pone.0192333 [doi] LID - e0192333 AB - Painful neuropathy (PN) is a prevalent condition in patients with metabolic syndrome (MetS). However, the pathogenic mechanisms of metabolic syndrome-associated painful neuropathy (MetSPN) remain unclear. In the current study, high-fat-fed mice (HF mice) were used to study MetSPN. HF mice developed MetS phenotypes, including increased body weight, elevated plasma cholesterol levels, and insulin resistance in comparison with control-fat-fed (CF) mice. Subsequently, HF mice developed mechanical allodynia and thermal hyperalgesia in hind paws after 8 wk of diet treatment. These pain behaviors coincided with increased densities of nociceptive epidermal nerve fibers and inflammatory cells such as Langerhans cells and macrophages in hind paw skin. To study the effect of MetS on profiles of cytokine expression in HF mice, we used a multiplex cytokine assay to study the protein expression of 12 pro-inflammatory and anti-inflammatory cytokines in dorsal root ganglion and serum samples. This method detected the elevated levels of proinflammatory cytokines, including tumor necrosis factor (TNF)-alpha, and interleukin (IL)-6, IL-1beta as well as reduced anti-inflammatory IL-10 in lumbar dorsal root ganglia (LDRG) of HF mice. Intraperitoneal administration of IL-10 reduced the upregulation of pro-inflammatory cytokines and alleviated pain behaviors in HF mice without affecting MetS phenotypes. Our findings suggested targeting HF-induced cytokine dysregulation could be an effective strategy for treating MetSPN. FAU - Zhang, Can AU - Zhang C AD - Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, United States of America. FAU - Ward, Joseph AU - Ward J AD - Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, United States of America. FAU - Dauch, Jacqueline R AU - Dauch JR AD - Department of Neurology, University of Michigan Medical Center, Ann Arbor, Michigan, United States of America. FAU - Tanzi, Rudolph E AU - Tanzi RE AD - Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, United States of America. FAU - Cheng, Hsinlin T AU - Cheng HT AUID- ORCID: 0000-0002-6309-7298 AD - Genetics and Aging Research Unit, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, United States of America. LA - eng GR - K08 NS061039/NS/NINDS NIH HHS/United States GR - 1K08NS061039/NH/NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20180206 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Cytokines) RN - 0 (Inflammation Mediators) RN - 0 (Insulin) RN - Neuropathy, Painful SB - IM MH - Animals MH - Cytokines/*physiology MH - Diet, High-Fat MH - Hypercholesterolemia/physiopathology MH - Inflammation Mediators/*physiology MH - Insulin/blood MH - Male MH - Metabolic Syndrome/*physiopathology MH - Mice MH - Mice, Inbred C57BL MH - Pain/*physiopathology MH - Peripheral Nervous System Diseases/*physiopathology MH - Real-Time Polymerase Chain Reaction MH - Weight Gain PMC - PMC5800683 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2018/02/07 06:00 MHDA- 2018/04/03 06:00 PMCR- 2018/02/06 CRDT- 2018/02/07 06:00 PHST- 2017/05/12 00:00 [received] PHST- 2017/12/29 00:00 [accepted] PHST- 2018/02/07 06:00 [entrez] PHST- 2018/02/07 06:00 [pubmed] PHST- 2018/04/03 06:00 [medline] PHST- 2018/02/06 00:00 [pmc-release] AID - PONE-D-17-18377 [pii] AID - 10.1371/journal.pone.0192333 [doi] PST - epublish SO - PLoS One. 2018 Feb 6;13(2):e0192333. doi: 10.1371/journal.pone.0192333. eCollection 2018.