Quantifying Spatiotemporal Parameters of Cellular Exocytosis in Micropatterned Cells

Hugo Lachuer; Pallavi Mathur; Kevin Bleakley; Kristine Schauer

doi:10.3791/60801

JoVE Journal
Biology

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JoVE Journal Biology

Quantifying Spatiotemporal Parameters of Cellular Exocytosis in Micropatterned Cells

마이크로 패턴 세포에서 세포 외세포증의 주당 측량 파라미터를 정량화

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10:21 min

September 16, 2020

DOI: 10.3791/60801-v

Hugo Lachuer^1,2,3, Pallavi Mathur^1,2,3, Kevin Bleakley⁴, Kristine Schauer^1,2,3

¹Unité Mixte de Recherche 144 CNRS, Molecular Mechanisms of Intracellular Transport group,Institut Curie, 75005 Paris, France, ²PSL Research University, Paris, France, ³Sorbonne Université, Paris, France, ⁴INRIA, Université Paris-Sud, PSL

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Overview

This study investigates lysosomal exocytosis in retinal pigment epithelial cells using TOF microscopy on micropatterned surfaces. The approach allows for spatial quantification of secretion events, thereby enhancing our understanding of macromolecule release in immune regulation and cancer.

Key Study Components

Research Area

Cell Biology
Cancer Biology
Microscopy Techniques

Background

Lysosomal exocytosis plays a critical role in secretory functions.
Deregulated secretion may affect cancer progression.
A micropatterning approach normalizes cell morphology for improved analysis.

Methods Used

Live imaging by TOF microscopy
Retinal pigment epithelial cells
Microfabrication of coverslips for micropatterning

Main Results

Spatial quantification of exocytosis events was achieved.
Normalizing cell division enhanced the accuracy of secretory event detection.
Data analysis allowed for detailed tracking of exocytosis spatial distribution.

Conclusions

This study provides insights into the spatial dynamics of lysosomal secretion.
The findings are relevant for understanding cellular processes in cancer and immune responses.

Frequently Asked Questions

What is lysosomal exocytosis?

Lysosomal exocytosis is the process by which lysosomes release their contents into the extracellular space, which is crucial for various cellular functions and responses.

How does micropatterning help in this study?

Micropatterning helps standardize cell morphology, allowing more consistent and spatially resolved measurements of secretion events.

What role do retinal pigment epithelial cells play?

These cells are important for visual function and serve as a model system for studying lysosomal exocytosis and its implications in diseases like cancer.

What technologies are utilized in this study?

The study employs TOF microscopy for live imaging and advanced spatial statistical tools for data analysis.

Why is the quantification of secretion important?

Quantification enables better understanding of cellular dynamics in health and disease contexts, particularly in cancer research.

What are the applications of this research?

The outcomes can inform therapeutic strategies for cancer by elucidating deregulated secretion pathways.

How does this study contribute to the field of cell biology?

It provides a novel method for analyzing cellular secretion processes, enhancing our understanding of fundamental biological functions.

미세 패턴 세포에 리소소피 외세포증의 라이브 이미징이 이 과정의 공간 적정화를 허용한다. 마이크로 패턴을 이용한 형태 학 정상화는 세포 프로세스의 공간 분포에 대한 일반적인 규칙을 발견하는 뛰어난 도구입니다.

이 프로토콜은 TOF 현미경검사법에 의한 라이브 이미징을 사용하여 세포 분비를 조사하는 방법을 보여 주며 군집 이벤트 또는 높은 활성 영역을 검출하는 도구를 제공합니다. 이 프로토콜을 사용하여, 우리는 세포 분열을 정상화하고 따라서 분비 이벤트의 특별한 범위를 용이하게 마이크로 패턴 표면에 세포 배양을 생성 할 수 있습니다. 세포는 면역 조절에서 중요한 역할을 하는 다양한 거대 분자를 분비합니다.

암에서, 규제 된 분비 침략을 촉진 하는 단백질 분해 효소의 방출에 영향을 미칩니다. 분비의 정량화는 우리가 암및 항원 프리젠 테이션이 있는 그밖 동적 프로세스에 있는 저하된 분비를 더 잘 이해할 수 있게 해줄 것입니다. 우리의 화상 진찰 및 분석 프로토콜은 간단하더라도, 마이크로 패턴의 조각에 잘 퍼지는 단 하나 세포의 생성을 요구합니다.

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