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Oligodendrocyte Progenitor Cell Transplantation Reduces White Matter Injury in a Fetal Goat Model
Yan Yue1, Bixin Deng1, Yan Zeng1
1Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, China.
Insights
Human oligodendrocyte progenitor cells (hOPCs) successfully differentiated into mature oligodendrocytes in a fetal goat model, significantly reducing preterm white matter injury (PWMI) and showing therapeutic potential.
Area of Science:
- Neuroscience
- Regenerative Medicine
- Developmental Biology
Background:
- Preterm white matter injury (PWMI) is a leading cause of neurological disability in premature infants.
- Oligodendrocyte progenitor cells (OPCs) are the primary cells affected in PWMI.
- Current treatments for PWMI are limited, necessitating novel therapeutic strategies.
Purpose of the Study:
- To evaluate the differentiation potential of human OPCs (hOPCs) in a fetal goat model of PWMI.
- To assess the therapeutic efficacy of hOPC transplantation in mitigating PWMI.
- To investigate the impact of hOPCs on myelin repair and the inflammatory environment.
Main Methods:
- A fetal goat model of PWMI was established using hypoxic-ischemia (HI) induced by intermittent umbilical cord occlusion.
- Twenty million hOPCs were administered intranasally 12 hours post-HI insult.
- Brain tissues were analyzed for oligodendrocyte differentiation (MBP, MAG, NG2, A2B5), myelination (myelinated nerve fiber percentage, g-ratio), inflammation, and neurotrophic factors (ELISA).
Main Results:
- Transplanted hOPCs survived and differentiated into mature oligodendrocytes (expressing MBP and MAG) in the white matter of HI-insulted goats.
- hOPC administration significantly increased myelin basic protein (MBP) and myelin-associated glycoprotein (MAG) levels, indicating enhanced myelination.
- hOPC treatment reduced PWMI markers, did not exacerbate inflammation, and modulated inflammatory/neurotrophic factors (decreased TNF-α, increased GDNF and BDNF).
Conclusions:
- Exogenous hOPCs can differentiate into functional oligodendrocytes in the developing brain of fetal goats.
- hOPC transplantation effectively alleviates hypoxic-ischemic brain injury and promotes myelin repair in a preclinical model.
- hOPC transplantation represents a promising cell-based therapeutic strategy for treating preterm white matter injury.
Background:
Preterm white matter injury (PWMI) is the most common type of brain injury in preterm infants, in which, oligodendrocyte progenitor cells (OPCs) are predominantly damaged. In this study, human OPCs (hOPCs) were administered to a fetal goat model of PWMI to examine the differentiation potential and therapeutic effects of the cells on PWMI.
Methods:
Preterm goat fetuses were subjected to hypoxic-ischemia (HI) via intermittent umbilical cord occlusion (5 min × 5). Twenty million hOPCs were administered via a nasal catheter 12 h after an HI insult, and brain tissues were collected 14 or 21 days after the HI insult. Myelin basic protein (MBP) and myelin-associated glycoprotein (MAG) were detected by immunofluorescence and western blotting techniques. The percentage of myelinated nerve fibers and g-ratio were examined using transmission electron microscopy. Inflammatory cells were detected by immunohistochemistry. Inflammatory and neurotrophic factors were measured using enzyme-linked immunosorbent assay.
Results:
Our results showed that intermittent umbilical cord occlusion induced PWMI in fetal goats. Transplanted hOPCs can survive in periventricular and subcortical white matter. Further, transplanted hOPCs expressed markers of mature oligodendrocytes (MBP and MAG) and few cells expressed markers of preoligodendrocytes (NG2 and A2B5), suggesting that these cells can differentiate into mature oligodendrocytes in the brain. In addition, hOPCs administration increased MBP and MAG levels, percentage of myelinated nerve fibers, and thickness of the myelin sheath, indicating a reduction in PWMI. Furthermore, hOPCs did not increase the inflammatory response after HI. Interestingly, hOPC administration decreased tumor necrosis factor-alpha and increased glial-derived neurotrophic factor and brain-derived neurotrophic factor levels after HI, suggesting that additional mechanisms mediate the inflammatory microenvironment and neuroprotective effects.
Conclusions:
Exogenous hOPCs can differentiate into mature oligodendrocytes in fetal goats and alleviate HI-induced PWMI. Transplantation of hOPCs is a promising strategy for treating PWMI.
