Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchyme Cells for Phosphoprotein Analysis

Madison A. Rogers; Brenna J. C. Dennison; Katherine A. Fantauzzo

doi:10.3791/63834

Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchy...

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Developmental Biology

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JoVE Journal Developmental Biology

Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchyme Cells for Phosphoprotein Analysis

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07:26 min

April 1, 2022

DOI: 10.3791/63834-v

Madison A. Rogers*¹, Brenna J. C. Dennison*¹, Katherine A. Fantauzzo¹

¹Department of Craniofacial Biology, School of Dental Medicine,University of Colorado Anschutz Medical Campus

Overview

This protocol outlines a method for isolating whole cell protein lysates from mouse embryo facial processes and cultured mouse embryonic palatal mesenchyme cells. It facilitates the assessment of phosphorylated protein levels, crucial for understanding craniofacial development.

Key Study Components

Area of Science

Neuroscience
Developmental Biology
Cell Biology

Background

Phosphoproteins play vital roles in cellular signaling during development.
Protein isolation often leads to dephosphorylation, complicating analysis.
This protocol addresses these challenges in a relevant biological context.
Mouse models are commonly used to study craniofacial development.

Purpose of Study

To isolate proteins while preserving their phosphorylated states.
To analyze the dynamics of phosphoproteins in craniofacial development.
To provide a reliable method for studying embryonic protein functions.

Methods Used

Dissection of mouse embryos to obtain facial processes.
Culture of mouse embryonic palatal mesenchyme cells.
Use of phosphatase inhibitors during protein lysis.
Western blotting to assess phosphorylated protein levels.

Main Results

Successful isolation of proteins with preserved phosphorylation.
Insights into the role of phosphoproteins in craniofacial development.
Demonstration of the effectiveness of the protocol in relevant contexts.
Potential applications in further developmental biology research.

Conclusions

The protocol provides a robust method for studying phosphoproteins.
It enhances understanding of molecular mechanisms in craniofacial development.
Future studies can build on this method to explore related biological questions.

Frequently Asked Questions

What is the significance of phosphoproteins in development?

Phosphoproteins are crucial for signaling pathways that regulate cellular processes during development.

How does this protocol prevent dephosphorylation?

The use of phosphatase inhibitors in lysis buffers helps maintain the integrity of phosphorylated proteins.

What tissues can be analyzed using this method?

This method can be used for mouse embryo facial processes and cultured palatal mesenchyme cells.

What is the role of western blotting in this protocol?

Western blotting is used to assess the levels of phosphorylated proteins after isolation.

Can this protocol be adapted for other tissues?

While designed for craniofacial tissues, adaptations may be possible for other relevant tissues.

The protocol presents a method for isolating whole cell protein lysates from dissected mouse embryo facial processes or cultured mouse embryonic palatal mesenchyme cells and performing subsequent western blotting to assess phosphorylated protein levels.

This protocol can be used to gain greater insight into the dynamics and roles of phosphoproteins active during mammalian craniofacial development. This protocol overcomes the common barrier of dephosphorylation during protein isolation from two physiologically relevant context, mouse facial processes and cultured mouse embryonic palatal mesenchyme cells. It is imperative to move quickly while keeping all reagents and materials on ice and to use phosphatase inhibitors in all lysis buffers to maintain the integrity of phosphorylated proteins.

To begin, lay the mouse body on a dissecting board with the ventral side facing up, and spray the mouse abdomen with 70%ethanol. Then open the abdominal cavity by pinching and lifting the skin anterior to the vaginal opening with straight Semken forceps. Next, cut the lifted skin in underlying layers with straight blade surgical scissors at a 45 degree angle on either side to generate a V-shape that extends to each lateral surface roughly halfway between the four limbs and hind limbs.

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