Cortisol, peptides and catecholamines in cerebrospinal fluid, pituitary effluent and peripheral blood of ponies.

This research seeks to establish the normal concentrations of cortisol, peptides, and catecholamines, in the cerebrospinal fluid and the bloodstream of horses, to provide a reference for equine species.

Introduction

• The study is centered around the investigation of the release of pituitary hormones in horses. The researchers identify cannulation of the pituitary effluent as an efficient process.
• The researchers aim to investigate the pituitary contribution towards endogenous opioid secretion in horses, an area that lacks prior research.
• The study also examines regular hormone concentrations in Cerebrospinal fluid (CSF). CSF is a key component as it directly reflects the Central Nervous System’s release of hormones.
• The researchers will additionally measure catecholamines in the CSF, an endeavour that has proven elusive in past studies due to the difficulty in detecting noradrenaline, adrenaline, or dopamine in horse samples.

Where the Research Fits

• Prior research studies have illustrated that the ACTH and AVP concentrations in plasma collected from the intercavemous sinus in the pituitary outflow were several times more than those measured in peripheral plasma.
• There are limited data describing normal horse hormone concentrations in CSF, particularly concerning the detection of catecholamines in conscious horses.
• Previous detections of dopamine in CSF were made when horses were under anaesthesia, thereby skewing the results due to altered physiological statuses. The current study seeks to fill this gap by analyzing CSF catecholamine concentration in conscious horses.

Purpose of the Study

• The primary aim of this study is to establish normal concentrations of cortisol, peptides, and catecholamines in both CSF and the bloodstream (peripheral and pituitary effluent plasma) in horses. These findings will serve as important reference values for the equine species.

Significance of the Study

• These reference values will provide a baseline for future research studies and medical evaluations of equine hormone and neurotransmitter levels.
• The study will contribute to a better understanding of the physiological and endocrine processes of horses, assisting in the development of better diagnostic techniques and treatments for equine disorders related to these systems.