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Cell Specific Gene Expression

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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...

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The Cochlea

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Initiating Differentiation in Immortalized Multipotent Otic Progenitor Cells

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Spatiotemporal differences in otoconial gene expression.

Yinfang Xu^1,2, Yan Zhang¹, Yunxia Wang Lundberg¹

¹Vestibular Genetics Laboratory, Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, Nebraska, 68131, USA.

Genesis (New York, N.Y. : 2000)

|October 30, 2016

Summary

This summary is machine-generated.

Otoconia gene expression is tightly regulated during inner ear development. Aging may lead to unregulated gene expression and potential ectopic otoconia debris formation in the ampulla.

Keywords:

RNA-Seq aging development otoconial genes spatial temporal

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Area of Science:

Inner ear biology
Biomineralization
Developmental biology

Background:

Otoconia, biocrystals in the inner ear, are crucial for balance.
Abnormalities can lead to vertigo and imbalance.
Understanding otoconia formation requires examining gene expression patterns.

Purpose of the Study:

To investigate the spatial and temporal expression of otoconial genes in the mouse inner ear.
To understand the molecular mechanisms of otoconia formation and maintenance.
To identify changes in gene expression during development, maturity, and aging.

Main Methods:

Whole transcriptome sequencing (RNA-Seq)
Quantitative reverse transcription PCR (RT-PCR)
Analysis of gene expression in C57Bl/6J mice at different life stages.

Main Results:

Otoconial gene expression is highest in the utricle and saccule before postnatal stages.
Some gene expression is restricted to the embryonic utricle and saccule.
Expression drastically decreases postnatally, with some genes showing increased expression in the aging ampulla.

Conclusions:

Otoconial gene expression is tightly regulated spatially and temporally during development.
Gene expression can become dysregulated in aging, potentially leading to ectopic debris formation.
This study provides insights into the molecular basis of otoconial homeostasis and age-related changes.