Long-term Monitoring of Oxygen Consumption Rates in Highly Differentiated and Polarized Retinal Pigment Epithelial Cultures

Qitao Zhang; Daisy Y. Shu; Richard A. Bryan; John Y. S. Han; Gillian A. Gulette; Kin Lo; Leo A. Kim; Jason M. L. Miller

doi:10.3791/67038

JoVE Journal
Biology

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JoVE Journal Biology

Long-term Monitoring of Oxygen Consumption Rates in Highly Differentiated and Polarized Retinal Pigment Epithelial Cultures

高分化型および分極した網膜色素上皮培養における酸素消費速度の長期モニタリング

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08:09 min

August 16, 2024

DOI: 10.3791/67038-v

Qitao Zhang*¹, Daisy Y. Shu*², Richard A. Bryan³, John Y. S. Han¹, Gillian A. Gulette¹, Kin Lo³, Leo A. Kim⁴, Jason M. L. Miller^1,5

¹Kellogg Eye Center,University of Michigan, Ann Arbor, ²School of Optometry and Vision Science,University of New South Wales, ³Lucid Scientific, ⁴Schepens Eye Research Institute of Mass. Eye and Ear, Department of Ophthalmology,Harvard Medical School, ⁵Cellular and Molecular Biology Program,University of Michigan, Ann Arbor

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Overview

This study addresses the degeneration of retinal pigment epithelium (RPE), a key factor in vision loss, by introducing a novel device for measuring oxygen consumption rates (OCR) in RPE cultures. The Resipher device enables long-term monitoring of OCR under ideal culture conditions, allowing for extensive bioenergetic profiling.

Key Study Components

Research Area

Retinal pigment epithelium (RPE) health and function
Mitochondrial function assessment
Oxygen consumption rates (OCR)

Background

Degeneration of RPE contributes to vision loss.
Mitochondrial dysfunction is associated with RPE degeneration.
Previous OCR measurement methods were limited by non-ideal culture conditions and short monitoring time.

Methods Used

Introduction of the Resipher device for long-term OCR measurement in RPE cultures
Well-differentiated retinal pigment epithelium cell cultures
Continuous monitoring under standard cell culture conditions

Main Results

Resipher allows for measurement of OCR over weeks.
Preserves cell health while enabling detailed bioenergetic profiling.
Facilitates experimental manipulation under ideal conditions.

Conclusions

The study demonstrates an advanced method for assessing mitochondrial function in vitro.
This innovative technique is significant for RPE research and potential therapeutic interventions in vision loss.

Frequently Asked Questions

What is Retinal Pigment Epithelium (RPE)?

RPE is a layer of cells that nourishes retinal visual cells and is crucial for maintaining vision.

Why is measuring oxygen consumption rates important?

Oxygen consumption rates provide insights into mitochondrial function and overall cell metabolism.

What is the advantage of using the Resipher device?

Resipher supports long-term OCR measurements under optimal conditions, unlike previous short-term methods.

How does mitochondrial dysfunction affect vision?

Mitochondrial dysfunction can lead to RPE degeneration, ultimately causing vision loss.

Can the Resipher device be used for other cell types?

While primarily designed for RPE, it may be adaptable for other cell cultures with similar requirements.

What conditions are ideal for RPE culture?

Ideal conditions include proper nutrient supply and oxygen levels, similar to those found in vivo.

What future research can this technique enable?

This technique can facilitate studies on nutrient usage and stress response in RPE cells.

私たちは、網膜色素上皮(RPE)培養における酸素消費率(OCR)を測定するための新しいデバイスを紹介します。このデバイスは、プレートが標準細胞培養インキュベーター内にある間に、標準培地で標準細胞培養プレートで成長したRPEで一度に数週間OCRを測定できます。

RPE、または網膜色素上皮の変性は、視力喪失の多くの原因の根底にあります。多くの場合、ミトコンドリアの機能不全がこのRPE変性の原因となっています。ミトコンドリアの機能は、酸素消費率、つまりOCRを見ることで測定できます。

ここでは、RPEでOCRを測定するための新しい方法を紹介します。複数の研究室の研究のおかげで、RPEはその健康と機能を維持するためにミトコンドリア活性を必要とするという確立された基盤を築いています。現在、研究は、RPEが優先的に使用する栄養素と、ストレス下でそれが変化するかどうかに重点が置かれています。

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