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Updated: Sep 23, 2026
Neural Stem Cell Transplantation in Experimental Contusive Model of Spinal Cord Injury
Published on: December 17, 2014
PARP inhibition improves the effectiveness of neural stem cell transplantation in experimental brain trauma
Zsombor Lacza1, Eszter M Horváth, Katalin Komjáti
1Department of Physioloty/Pharmacology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. zlacza@mac.com
Abstract:
Neural stem cell transplantation is a promising new treatment of ischemic or traumatic brain injury. We have now investigated the involvement of the peroxynitrite - poly(ADP-ribose) polymerase (ONOO- - PARP) activation cascade in brain trauma and neural stem cell transplantation. The forelimb motor cortex of adult male rats was exposed to cold lesion (-60 degrees C) and motor function was monitored. Neural stem cells isolated from E14 rat embryos were labeled with brome deoxyuridine (BrDU) and injected into the injured cortex 6 days after the lesion. After another 6 days, the survival and differentiation of the grafted cells were investigated with immunohistochemistry. Increased production of ONOO- revealed by tyrosine nitration was seen in the lesion 2 days after transplantation. Animals treated with the ONOO- decomposition catalyst FP15 or the PARP inhibitor PJ34 had a significantly improved motor score, when compared to vehicle-treated controls. The neurological score further improved following stem cell grafting in the PJ34 treated, but not in the control animals. Six days after transplantation, differentiated BrDU positive cells were found in the cortical penumbra. The majority of these differentiated cells expressed an astrocyte marker and some of the cells expressed oligodendrocyte or neuronal markers. The number of surviving transplanted cells was significantly higher in the PJ34 treated group. Inhibition of the ONOO- - PARP activation cascade significantly improves the effectiveness of neural stem cell transplantation and promotes rapid functional recovery.
Insights
Neural stem cell transplantation aids brain injury recovery. Inhibiting the peroxynitrite-poly(ADP-ribose) polymerase cascade significantly boosts treatment effectiveness and functional recovery in brain trauma models.
Area of Science:
- Neuroscience
- Regenerative Medicine
- Biochemistry
Background:
- Neural stem cell transplantation shows promise for treating brain injuries.
- The peroxynitrite-poly(ADP-ribose) polymerase (ONOO- - PARP) cascade's role in brain trauma and stem cell therapy is not fully understood.
Purpose of the Study:
- To investigate the involvement of the ONOO- - PARP cascade in brain trauma.
- To evaluate the impact of inhibiting this cascade on neural stem cell transplantation efficacy and functional recovery.
Main Methods:
- Adult male rats received cold lesions to the forelimb motor cortex.
- Neural stem cells were transplanted 6 days post-lesion.
- Animals were treated with an ONOO- decomposition catalyst (FP15) or a PARP inhibitor (PJ34).
- Motor function, neurological scores, and cell survival/differentiation were assessed via immunohistochemistry.
Main Results:
- Increased ONOO- production was observed in the injured cortex.
- Treatment with FP15 or PJ34 significantly improved motor scores compared to controls.
- Stem cell grafting further enhanced neurological scores in PJ34-treated animals.
- Transplanted cells differentiated into astrocytes, oligodendrocytes, and neurons.
- PJ34 treatment significantly increased the survival of transplanted cells.
Conclusions:
- Inhibition of the ONOO- - PARP cascade enhances neural stem cell transplantation effectiveness.
- Targeting this cascade promotes functional recovery after brain injury.
- This strategy offers a promising approach for improving outcomes in brain trauma treatment.
