Volume 16, Issue 4 pp. 708-721

Progranulin contributes to endogenous mechanisms of pain defense after nerve injury in mice

Hee-Young Lim

Hee-Young Lim

Pharmazentrum frankfurt, ZAFES, Clinical Pharmacology, Goethe-University, Frankfurt, Germany

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Boris Albuquerque

Boris Albuquerque

Pharmazentrum frankfurt, ZAFES, Clinical Pharmacology, Goethe-University, Frankfurt, Germany

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Annett Häussler

Annett Häussler

Pharmazentrum frankfurt, ZAFES, Clinical Pharmacology, Goethe-University, Frankfurt, Germany

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Thekla Myrczek

Thekla Myrczek

Pharmazentrum frankfurt, ZAFES, Clinical Pharmacology, Goethe-University, Frankfurt, Germany

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Aihao Ding

Aihao Ding

Department of Microbiology and Immunology, Weill Cornell Medical College, NY, USA

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Irmgard Tegeder

Corresponding Author

Irmgard Tegeder

Pharmazentrum frankfurt, ZAFES, Clinical Pharmacology, Goethe-University, Frankfurt, Germany

Irmgard TEGEDER, Pharmazentrum Frankfurt, Institut für Klinische Pharmakologie, Klinikum der Goethe-Universität Frankfurt, Theodor Stern Kai 7, Haus 74, 60590 Frankfurt am Main, Germany. Tel.: +49-69-6301-7621 Fax: +49-69-6301-7636 E-mail: [email protected]Search for more papers by this author
First published: 07 June 2011
Citations: 20

Abstract

Progranulin haploinsufficiency is associated with frontotemporal dementia in humans. Deficiency of progranulin led to exaggerated inflammation and premature aging in mice. The role of progranulin in adaptations to nerve injury and neuropathic pain are still unknown. Here we found that progranulin is up-regulated after injury of the sciatic nerve in the mouse ipsilateral dorsal root ganglia and spinal cord, most prominently in the microglia surrounding injured motor neurons. Progranulin knockdown by continuous intrathecal spinal delivery of small interfering RNA after sciatic nerve injury intensified neuropathic pain-like behaviour and delayed the recovery of motor functions. Compared to wild-type mice, progranulin-deficient mice developed more intense nociceptive hypersensitivity after nerve injury. The differences escalated with aging. Knockdown of progranulin reduced the survival of dissociated primary neurons and neurite outgrowth, whereas addition of recombinant progranulin rescued primary dorsal root ganglia neurons from cell death induced by nerve growth factor withdrawal. Thus, up-regulation of progranulin after neuronal injury may reduce neuropathic pain and help motor function recovery, at least in part, by promoting survival of injured neurons and supporting regrowth. A deficiency in this mechanism may increase the risk for injury-associated chronic pain.

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