Planarian Ovary Dissection for Ultrastructural Analysis and Antibody Staining

Fengli Guo; Melainia McClain; Xia Zhao; Kexi Yi; Tari Parmely; Jay Unruh; Brian Slaughter; Leonid Kruglyak; Longhua Guo; Alejandro S&#225;nchez Alvarado

doi:10.3791/62713

Disección de ovario planario para análisis ultraestructural y tinción de anticuerpos

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Planarian Ovary Dissection for Ultrastructural Analysis and Antibody Staining

Disección de ovario planario para análisis ultraestructural y tinción de anticuerpos

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04:08 min

September 10, 2021

DOI: 10.3791/62713-v

Fengli Guo¹, Melainia McClain¹, Xia Zhao¹, Kexi Yi¹, Tari Parmely¹, Jay Unruh¹, Brian Slaughter¹, Leonid Kruglyak^2,3, Longhua Guo^2,3, Alejandro Sánchez Alvarado^1,2

¹Stowers Institute for Medical Research, ²Howard Hughes Medical Institute, ³Department of Human Genetics,University of California Los Angeles

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Overview

This protocol details the dissection of ovaries in the freshwater planarian Schmidtea mediterranea, aimed at enabling cellular and subcellular analysis of oocyte biology. The method enhances imaging quality and depth through techniques such as transmission electron microscopy (TEM) and antibody immunostaining.

Key Study Components

Research Area

Cell biology
Oocyte analysis
Planarian biology

Background

The anatomy of sexual planarians is crucial for effective dissection.
Feeding planarians with organic liver paste promotes sexual maturity.
Ovaries are located based on epithelial pigmentation patterns.

Methods Used

Surgical dissection methods
Freshwater planarian Schmidtea mediterranea
Transmission electron microscopy (TEM) and immunofluorescence staining

Main Results

Efficient localization and dissection of ovaries from sexual planarians.
High-quality imaging of cellular structures and somatic cell types.
Method supports RNA interference experiments to study molecular regulations.

Conclusions

This study provides a novel technique for reproductive cell analysis in planarians.
It advances understanding of oocyte biology and supports future genetic studies.

Frequently Asked Questions

What organism is used in this study?

The study utilizes the freshwater planarian Schmidtea mediterranea.

What is the main goal of this protocol?

The main goal is to dissect ovaries for analysis of oocyte cell biology.

Why is anatomical knowledge important?

Understanding the anatomy aids in successfully locating and dissecting the ovaries.

What techniques are used for assessment?

The protocol employs transmission electron microscopy (TEM) and antibody immunostaining.

What benefits does this method offer?

It allows for high-quality imaging of oocyte cellular structures that were previously hard to access.

How does this research impact future studies?

It enables new avenues for genetic and molecular biology research involving oocytes.

What preparation is necessary before starting the experiment?

Feeding the planarians with organic liver paste helps achieve sexual maturity necessary for the experiment.

Este protocolo presenta los pasos tomados para diseccionar los ovarios en las planarias de agua dulce, Schmidtea mediterranea. Los ovarios disecados son compatibles para la inmunotinción de anticuerpos y el análisis ultraestructural con microscopía electrónica de transmisión para estudiar la biología celular de los ovocitos y las células somáticas, proporcionando una profundidad y calidad de imagen que antes eran inaccesibles.

El objetivo de este método es diseccionar los ovarios de la planaria Schmidtea mediterranea para el análisis celular y subcelular de la biología de los ovocitos con TEM o tinción de anticuerpos. Este protocolo utiliza un breve paso de fijación para facilitar la localización y disección de los ovarios planarios, lo que proporcionará una profundidad y calidad de imagen que antes eran inaccesibles. La mayor lucha para alguien que nunca antes ha realizado esta técnica será localizar los ovarios después de la fijación.

Será útil familiarizarse con la anatomía de las planarias sexuales antes del experimento. Prepárese para el experimento alimentando a las planarias sexuales con pasta de hígado orgánica dos veces por semana para lograr la madurez sexual. Trate los gusanos sexualmente maduros con N-acetil-L-cisteína al 5%, o NAC, en un plato a temperatura ambiente durante cinco minutos.

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