Unraveling the Role of Discrete Areas of the Rat Brain in the Regulation of Ovulation through Reversible Inactivation by Tetrodotoxin Microinjections
September 3rd, 2020
This protocol describes the construction of a low-cost microinjection system, its stereotaxic implantation into deep-brain structures and the procedure for timed microinjections of tetrodotoxin in awake and unrestrained rats. The goal is to reveal the participation of hypothalamic structures in the regulation of ovulation by inhibiting their neural activity.
This protocol allows researchers to explore the nuclei of the neuronal circuits that regulates ovulation in female mammals at specific times of their estrous cycle.This technique can be adapted to study any process on the regulation of the brain in any species.Also they can less art fabricator in the lab lowering the overall cost.Demonstrating this procedure will be Montserrat Bola
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Overview
This protocol describes the construction of a cost-effective microinjection system to study the hypothalamic regulation of ovulation in female mammals. Using timed microinjections of tetrodotoxin into awake and unrestrained rats, researchers can investigate the neural activity associated with ovulation. The method is adaptable for other species and processes concerning brain regulation.
Key Study Components
Area of Science
- Neurobiology
- Reproductive Biology
- Neuroscience Techniques
Background
- The hypothalamus plays a crucial role in regulating ovulation.
- Understanding neural circuits during the estrous cycle is important for reproductive research.
- Current methods can be costly, limiting their accessibility in research.
- Low-cost solutions are essential for broader application of such techniques.
Purpose of Study
- To construct a microinjection system that reduces costs.
- To explore the role of hypothalamic structures in ovulation regulation.
- To adapt the technique for various species and biological processes.
Methods Used
- Microinjection system construction and stereotaxic implantation.
- Investigating timed microinjections of tetrodotoxin in awake rats.
- The adaptability of the method for other species is emphasized.
- Steps include detailed procedures for implantation and injection timing.
Main Results
- This study demonstrates the feasibility of a low-cost microinjection setup for neural circuit studies.
- Exploring hypothalamic inhibition provides insights into ovulation regulation.
- Research findings indicate specific neural mechanisms involved in reproductive functions.
- The adaptability of the procedure allows broader applications in various biological studies.
Conclusions
- The study enables deeper understanding of hypothalamic involvement in ovulation.
- Implications contribute to reproductive neurobiology and practical lab applications.
- This method has potential for further research into neural mechanisms and associated disorders.
Frequently Asked Questions
Chapters in this video
0:04
Introduction
0:47
Construction of Bilateral Cannulas, Obturators, and Caps
2:49
Construction of Microinjectors
4:10
Animal Maintenance and Vaginal Smears
5:31
Microinjection of TTX or Vehicle Solutions into Freely Moving Rats
7:27
Tissue Processing
8:44
Results: Percentage of Ovulating Animals and Median of the Number of Ova Shed after Microinjection with Artificial Cerebrospinal Fluid (ACSF) or Tetrodotoxin (TTX)
10:08
Conclusion
