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Updated: Oct 9, 2026
Progenitor-derived Oligodendrocyte Culture System from Human Fetal Brain
Published on: December 20, 2012
Late oligodendrocyte progenitors coincide with the developmental window of vulnerability for human perinatal white
S A Back1, N L Luo, N S Borenstein
1Department of Pediatrics, Oregon Health Sciences University, Portland, Oregon 97201, USA. Backs@ohsu.edu
Insights
Periventricular leukomalacia (PVL) in premature infants disrupts oligodendrocyte development. The late oligodendrocyte progenitor stage, before myelination begins, is most vulnerable to hypoxic-ischemic injury, increasing cerebral palsy risk.
Area of Science:
- Neuroscience
- Developmental Biology
- Neonatal Neurology
Background:
- Periventricular leukomalacia (PVL) is a leading cause of brain injury in premature infants, resulting in cerebral palsy.
- PVL is characterized by chronic myelination disturbances, indicating disrupted oligodendrocyte (OL) lineage progression due to ischemic injury.
Purpose of the Study:
- To identify the specific oligodendrocyte lineage stages vulnerable to injury during the critical developmental window for PVL (23-32 weeks postconceptional age).
- To understand the relationship between OL development, myelination onset, and PVL risk in the periventricular white matter.
Main Methods:
- Analysis of 26 normal control human autopsy brains (18-41 weeks postconceptional age).
- Characterization of oligodendrocyte lineage stages using specific antibodies (anti-NG2, O4, O1, anti-MBP) in the parietal white matter.
- Quantification of OL progenitor and immature OL populations and assessment of myelination.
Main Results:
- Late oligodendrocyte progenitors (NG2+O4+) were the predominant stage throughout late gestation.
- Immature oligodendrocytes (O4+O1+) increased significantly between 28-41 weeks, coinciding with the onset of myelination (MBP+).
- The high-risk window for PVL (23-32 weeks) precedes significant myelination and is characterized by a high proportion of late OL progenitors.
Conclusions:
- The late oligodendrocyte progenitor is the primary target of hypoxic-ischemic injury during the vulnerable window for PVL.
- The decline in PVL incidence around 32 weeks correlates with the onset of myelination, suggesting myelination offers some protection.
- Understanding OL vulnerability is crucial for developing strategies to prevent PVL and subsequent cerebral palsy in premature infants.
Abstract:
Hypoxic-ischemic injury to the periventricular cerebral white matter [periventricular leukomalacia (PVL)] results in cerebral palsy and is the leading cause of brain injury in premature infants. The principal feature of PVL is a chronic disturbance of myelination and suggests that oligodendrocyte (OL) lineage progression is disrupted by ischemic injury. We determined the OL lineage stages at risk for injury during the developmental window of vulnerability for PVL (23-32 weeks, postconceptional age). In 26 normal control autopsy human brains, OL lineage progression was defined in parietal white matter, a region of predilection for PVL. Three successive OL stages, the late OL progenitor, the immature OL, and the mature OL, were characterized between 18 and 41 weeks with anti-NG2 proteoglycan, O4, O1, and anti-myelin basic protein (anti-MBP) antibodies. NG2+O4+ late OL progenitors were the predominant stage throughout the latter half of gestation. Between 18 and 27 weeks, O4+O1+ immature OLs were a minor population (9.9 +/- 2.1% of total OLs; n = 9). Between 28 and 41 weeks, an increase in immature OLs to 30.9 +/- 2.1% of total OLs (n = 9) was accompanied by a progressive increase in MBP+ myelin sheaths that were restricted to the periventricular white matter. The developmental window of high risk for PVL thus precedes the onset of myelination and identifies the late OL progenitor as the major potential target. Moreover, the decline in incidence of PVL at approximately 32 weeks coincides with the onset of myelination in the periventricular white matter and suggests that the risk for PVL is related to the presence of late OL progenitors in the periventricular white matter.
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