Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands

Elham Dianati; Isabelle Plante

doi:10.3791/55772

Analyse des interactions protéine-protéine et co-localisation entre les composants de Gap, Tight ...

JoVE Journal
Developmental Biology

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JoVE Journal Developmental Biology

Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands

Analyse des interactions protéine-protéine et co-localisation entre les composants de Gap, Tight et Adherens Junctions dans les glandes mammaires murines

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11:31 min

May 30, 2017

DOI: 10.3791/55772-v

Elham Dianati^1,2, Isabelle Plante¹

¹INRS, Institut Armand-Frappier, ²Biomed, UQAM

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Overview

This study focuses on intercellular junctions in mammary glands and their role in development and disease. It details a protocol for investigating protein-protein interactions and co-localization in murine mammary tissues.

Key Study Components

Area of Science

Neuroscience
Cell Biology
Developmental Biology

Background

Intercellular junctions are crucial for mammary gland function.
Understanding PPIs can shed light on normal development and breast cancer.
Co-immunoprecipitation is a key technique for studying these interactions.
The study provides a cost-effective method for in vivo analysis.

Purpose of Study

To determine co-localization of junction proteins in mammary cells.
To assess physical interactions between these proteins.
To explore the implications for mammary gland biology and disease.

Methods Used

Co-immunoprecipitation for assessing protein interactions.
Co-immunofluorescent staining for visualizing protein localization.
Use of murine mammary gland tissues for experimental analysis.
Microscopic examination of stained sections.

Main Results

Identification of key intercellular junction proteins.
Evidence of co-localization at various developmental stages.
Insights into the dynamics of protein interactions.
Potential links to breast cancer pathology.

Conclusions

Intercellular junctions play vital roles in mammary gland biology.
Co-immunoprecipitation is effective for studying PPIs in vivo.
Findings may inform future research on breast cancer mechanisms.

Frequently Asked Questions

What are intercellular junctions?

Intercellular junctions are structures that facilitate communication and adhesion between cells, crucial for tissue integrity.

Why study protein-protein interactions?

Studying PPIs helps understand cellular functions and the mechanisms underlying diseases like breast cancer.

What is co-immunoprecipitation?

Co-immunoprecipitation is a technique used to isolate and study protein complexes from cell lysates.

How does co-immunofluorescent staining work?

This method uses fluorescently labeled antibodies to visualize specific proteins in cells under a microscope.

What are the advantages of this study's methods?

The methods are cost-effective and provide significant insights into protein interactions in vivo.

What implications do the findings have?

The findings may enhance understanding of mammary gland development and its relation to breast cancer.

Les jonctions inter-cellulaires sont indispensables pour les fonctions et le développement de la glande mammaire. Ce manuscrit fournit un protocole détaillé pour l'étude des interactions protéines-protéines (IPP) et la co-localisation à l'aide de glandes mammaires murines. Ces techniques permettent d'étudier la dynamique de l'association physique entre les jonctions intercellulaires à différents stades de développement.

L’objectif global de cette méthode est de déterminer si deux ou plusieurs protéines de jonction intercellulaire colocalisent au sein des cellules et d’évaluer davantage leur interaction physique via la co-immunoprécipitation. Cette méthode peut aider à répondre à des questions clés sur la biologie du domaine de la glande mammaire, y compris le rôle joué par les jonctions dans le développement normal et des maladies telles que le cancer du sein. Le principal avantage de cette technique est qu’elle peut fournir des informations significatives sur l’interaction protéine-protéine in vivo à un coût relativement faible.

Pour effectuer une coloration par fluorescence co-immuno, récupérez les lames microscopiques appropriées du congélateur. Fixez immédiatement les sections en les immergeant dans du formaldéhyde à quatre pour cent pendant 15 minutes à température ambiante. Ensuite, plongez les lames dans une solution saline tamponnée au phosphate à température ambiante.

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