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Neurostereology protocol for unbiased quantification of neuronal injury and neurodegeneration.

Golub VM, Brewer J, Wu X, Kuruba R, Short J, Manchi M, Swonke M, Younus I, Reddy DS - Front Aging Neurosci (2015)

Bottom Line: Regional tissue volume was determined by using the Cavalieri estimator, as well as cell density and cell number were determined by using the optical disector and optical fractionator.The protocol has greater predictive power for absolute counts as it is based on 3D features rather than 2D images.The total neuron counts were consistent with literature values from sophisticated systems, which are more expensive than our stereology system.

View Article: PubMed Central - PubMed

Affiliation: Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, College of Medicine Bryan, TX, USA.

ABSTRACT
Neuronal injury and neurodegeneration are the hallmark pathologies in a variety of neurological conditions such as epilepsy, stroke, traumatic brain injury, Parkinson's disease and Alzheimer's disease. Quantification of absolute neuron and interneuron counts in various brain regions is essential to understand the impact of neurological insults or neurodegenerative disease progression in animal models. However, conventional qualitative scoring-based protocols are superficial and less reliable for use in studies of neuroprotection evaluations. Here, we describe an optimized stereology protocol for quantification of neuronal injury and neurodegeneration by unbiased counting of neurons and interneurons. Every 20th section in each series of 20 sections was processed for NeuN(+) total neuron and parvalbumin(+) interneuron immunostaining. The sections that contain the hippocampus were then delineated into five reliably predefined subregions. Each region was separately analyzed with a microscope driven by the stereology software. Regional tissue volume was determined by using the Cavalieri estimator, as well as cell density and cell number were determined by using the optical disector and optical fractionator. This protocol yielded an estimate of 1.5 million total neurons and 0.05 million PV(+) interneurons within the rat hippocampus. The protocol has greater predictive power for absolute counts as it is based on 3D features rather than 2D images. The total neuron counts were consistent with literature values from sophisticated systems, which are more expensive than our stereology system. This unbiased stereology protocol allows for sensitive, medium-throughput counting of total neurons in any brain region, and thus provides a quantitative tool for studies of neuronal injury and neurodegeneration in a variety of acute brain injury and chronic neurological models.

No MeSH data available.


Related in: MedlinePlus

Rat brain atlas illustration of quantitative neurostereology protocol in sections stained with Nissl (left panels) and NeuN staining (right panels). Brain structure (e.g., CA1, CA2, CA3, DG and DH in hippocampus) markings for stereology.
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Figure 6: Rat brain atlas illustration of quantitative neurostereology protocol in sections stained with Nissl (left panels) and NeuN staining (right panels). Brain structure (e.g., CA1, CA2, CA3, DG and DH in hippocampus) markings for stereology.

Mentions: Step process for stereology.


Neurostereology protocol for unbiased quantification of neuronal injury and neurodegeneration.

Golub VM, Brewer J, Wu X, Kuruba R, Short J, Manchi M, Swonke M, Younus I, Reddy DS - Front Aging Neurosci (2015)

Rat brain atlas illustration of quantitative neurostereology protocol in sections stained with Nissl (left panels) and NeuN staining (right panels). Brain structure (e.g., CA1, CA2, CA3, DG and DH in hippocampus) markings for stereology.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4628120&req=5

Figure 6: Rat brain atlas illustration of quantitative neurostereology protocol in sections stained with Nissl (left panels) and NeuN staining (right panels). Brain structure (e.g., CA1, CA2, CA3, DG and DH in hippocampus) markings for stereology.
Mentions: Step process for stereology.

Bottom Line: Regional tissue volume was determined by using the Cavalieri estimator, as well as cell density and cell number were determined by using the optical disector and optical fractionator.The protocol has greater predictive power for absolute counts as it is based on 3D features rather than 2D images.The total neuron counts were consistent with literature values from sophisticated systems, which are more expensive than our stereology system.

View Article: PubMed Central - PubMed

Affiliation: Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, College of Medicine Bryan, TX, USA.

ABSTRACT
Neuronal injury and neurodegeneration are the hallmark pathologies in a variety of neurological conditions such as epilepsy, stroke, traumatic brain injury, Parkinson's disease and Alzheimer's disease. Quantification of absolute neuron and interneuron counts in various brain regions is essential to understand the impact of neurological insults or neurodegenerative disease progression in animal models. However, conventional qualitative scoring-based protocols are superficial and less reliable for use in studies of neuroprotection evaluations. Here, we describe an optimized stereology protocol for quantification of neuronal injury and neurodegeneration by unbiased counting of neurons and interneurons. Every 20th section in each series of 20 sections was processed for NeuN(+) total neuron and parvalbumin(+) interneuron immunostaining. The sections that contain the hippocampus were then delineated into five reliably predefined subregions. Each region was separately analyzed with a microscope driven by the stereology software. Regional tissue volume was determined by using the Cavalieri estimator, as well as cell density and cell number were determined by using the optical disector and optical fractionator. This protocol yielded an estimate of 1.5 million total neurons and 0.05 million PV(+) interneurons within the rat hippocampus. The protocol has greater predictive power for absolute counts as it is based on 3D features rather than 2D images. The total neuron counts were consistent with literature values from sophisticated systems, which are more expensive than our stereology system. This unbiased stereology protocol allows for sensitive, medium-throughput counting of total neurons in any brain region, and thus provides a quantitative tool for studies of neuronal injury and neurodegeneration in a variety of acute brain injury and chronic neurological models.

No MeSH data available.


Related in: MedlinePlus