No pain, No gain

Lack of exercise obstructs neurogenesis

Nate Watson, Xunming Ji, Takao Yasuhara, Isao Date, Yuji Kaneko, Naoki Tajiri, Cesar V. Borlongan

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Bedridden patients develop atrophied muscles, their daily activities greatly reduced, and some display a depressive mood. Patients who are able to receive physical rehabilitation sometimes show surprising clinical improvements, including reduced depression and attenuation of other stress-related behaviors. Regenerative medicine has advanced two major stem cell-based therapies for CNS disorders, namely, transplantation of exogenous stem cells and amplification of endogenous neurogenesis. The latter strategy embraces a natural way of reinnervating the damaged brain and correcting the neurological impairments. In this study, we discussed how immobilization-induced disuse atrophy, using the hindlimb suspension model, affects neurogenesis in rats. The overarching hypothesis is that immobilization suppresses neurogenesis by reducing the circulating growth or trophic factors, such as vascular endothelial growth factor or brain-derived neurotrophic factor. That immobilization alters neurogenesis and stem cell differentiation in the CNS requires characterization of the stem cell microenvironment by examining the trophic and growth factors, as well as stress-related proteins that have been implicated in exercise-induced neurogenesis. Although accumulating evidence has revealed the contribution of “increased” exercise on neurogenesis, the reverse paradigm involving “lack of exercise,” which mimics pathological states (e.g., stroke patients are often immobile), remains underexplored. This novel paradigm will enable us to examine the effects on neurogenesis by a nonpermissive stem cell microenvironment likely produced by lack of exercise. BrdU labeling of proliferative cells, biochemical assays of serum, cerebrospinal fluid and brain levels of trophic factors, growth factors, and stress-related proteins are proposed as indices of neurogenesis, while quantitative measurements of spontaneous movements will reveal psychomotor components of immobilization. Studies designed to reveal how in vivo stimulation, or lack thereof, alters the stem cell microenvironment are needed to begin to develop treatment strategies for enhancing neurogenesis in bedridden patients.

Original languageEnglish
Pages (from-to)591-597
Number of pages7
JournalCell Transplantation
Volume24
Issue number4
DOIs
Publication statusPublished - 2015

Fingerprint

Neurogenesis
Stem cells
Exercise
Stem Cell Niche
Immobilization
Brain
Heat-Shock Proteins
Cerebrospinal fluid
Proteins
Intercellular Signaling Peptides and Proteins
Stem Cells
Atrophic Muscular Disorders
Patient rehabilitation
Labeling
Hindlimb Suspension
Amplification
Muscle
Rats
Assays
Regenerative Medicine

Keywords

  • Immobilization
  • Neurogenesis
  • Neurological disorders
  • Physical exercise
  • Stem cells

ASJC Scopus subject areas

  • Cell Biology
  • Transplantation
  • Biomedical Engineering

Cite this

No pain, No gain : Lack of exercise obstructs neurogenesis. / Watson, Nate; Ji, Xunming; Yasuhara, Takao; Date, Isao; Kaneko, Yuji; Tajiri, Naoki; Borlongan, Cesar V.

In: Cell Transplantation, Vol. 24, No. 4, 2015, p. 591-597.

Research output: Contribution to journalArticle

Watson, N, Ji, X, Yasuhara, T, Date, I, Kaneko, Y, Tajiri, N & Borlongan, CV 2015, 'No pain, No gain: Lack of exercise obstructs neurogenesis', Cell Transplantation, vol. 24, no. 4, pp. 591-597. https://doi.org/10.3727/096368915X687723
Watson, Nate ; Ji, Xunming ; Yasuhara, Takao ; Date, Isao ; Kaneko, Yuji ; Tajiri, Naoki ; Borlongan, Cesar V. / No pain, No gain : Lack of exercise obstructs neurogenesis. In: Cell Transplantation. 2015 ; Vol. 24, No. 4. pp. 591-597.
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