Larry I Benowitz1, Phillip G Popovich. 1. Laboratory for Neuroscience Research in Neurosurgery and F.M. Kirby Neurobiology Center, Children's Hospital, and Department of Surgery, Harvard Medical School, Boston, Massachusetts 02115, USA. larry.benowitz@childrens.harvard.edu
Abstract
PURPOSE OF REVIEW: The inflammatory response that accompanies neural injury involves multiple cell types and effector molecules with both positive and negative effects. Inflammation is essential for normal regeneration in the peripheral nervous system, and here we review evidence that augmenting inflammation can enhance regeneration in areas of the central nervous system in which it normally does not occur. RECENT FINDINGS: Within the spinal cord, inflammation enables transplanted sensory neurons to regenerate lengthy axons and enhances the ability of a trophic factor to promote corticospinal tract sprouting. Induction of inflammation in the eye supports survival of retinal ganglion cells and enables them to regenerate injured axons through the optic nerve. These effects are linked to an atypical trophic factor, oncomodulin, along with other, better known molecules. Induction of inflammation within dorsal root ganglia, when combined with other treatments, enables peripheral sensory neurons to regenerate axons into the spinal cord. However, inflammation also has negative effects that impede recovery. SUMMARY: In light of the importance of inflammation for neural repair, it is important to identify the specific cell types and molecules responsible for the positive and negative effects of inflammation and to develop treatments that tip the balance to favor repair.
PURPOSE OF REVIEW: The inflammatory response that accompanies neural injury involves multiple cell types and effector molecules with both positive and negative effects. Inflammation is essential for normal regeneration in the peripheral nervous system, and here we review evidence that augmenting inflammation can enhance regeneration in areas of the central nervous system in which it normally does not occur. RECENT FINDINGS: Within the spinal cord, inflammation enables transplanted sensory neurons to regenerate lengthy axons and enhances the ability of a trophic factor to promote corticospinal tract sprouting. Induction of inflammation in the eye supports survival of retinal ganglion cells and enables them to regenerate injured axons through the optic nerve. These effects are linked to an atypical trophic factor, oncomodulin, along with other, better known molecules. Induction of inflammation within dorsal root ganglia, when combined with other treatments, enables peripheral sensory neurons to regenerate axons into the spinal cord. However, inflammation also has negative effects that impede recovery. SUMMARY: In light of the importance of inflammation for neural repair, it is important to identify the specific cell types and molecules responsible for the positive and negative effects of inflammation and to develop treatments that tip the balance to favor repair.
Authors: Takao Omura; Kumiko Omura; Andrea Tedeschi; Priscilla Riva; Michio W Painter; Leticia Rojas; Joshua Martin; Véronique Lisi; Eric A Huebner; Alban Latremoliere; Yuqin Yin; Lee B Barrett; Bhagat Singh; Stella Lee; Tom Crisman; Fuying Gao; Songlin Li; Kush Kapur; Daniel H Geschwind; Kenneth S Kosik; Giovanni Coppola; Zhigang He; S Thomas Carmichael; Larry I Benowitz; Michael Costigan; Clifford J Woolf Journal: Neuron Date: 2015-05-21 Impact factor: 17.173
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