Distribution of eosinophils and mast cells in the cervical tissue of non-gravid mares during dioestrus.

The research aims to understand the placement of two types of cells, eosinophils and mast cells, in the cervical tissue of non-pregnant horses during a particular part of their reproductive cycle, called dioestrus. It finds a difference in their distribution when compared to other animals like cows and rats.

Objectives of the Study

• The primary objective of the study was to establish an understanding of the local cellular immune system in the cervical tissue of non-pregnant mares during their dioestrus period, which is a phase in their reproductive cycle.
• To accomplish this, the researchers examined the distribution of eosinophilic granulocytes and mast cells, both significant players in the immune system, in the equine cervix.

Methodology of the Research

• Researchers studied the cervical tissue of 10 mares, staining the tissue samples with Sirius red and Toluidine blue to effectively observe and distinguish the eosinophils and mast cells.
• The cells were then looked for in different layers of the cervical tissue – the lamina propria mucosae (a layer of loose connective tissue), the tunica muscularis (the muscle layer), and the epithelium mucosae (the surface layer).

Results and Findings

• The researchers found both eosinophils and mast cells in the lamina propria mucosae.
• These cells were less frequently seen in the tunica muscularis, and couldn’t be found at all in the epithelium mucosae.
• Additionally, there was observed to be a decrease in cell density from the vaginal side of the cervix to the uterine side, a pattern which was statistically significant.

Conclusions and Significance

• From these results, the researchers concluded that eosinophils might play a part in the local cellular immune system of a non-pregnant mare’s cervix during dioestrus.
• This is notable because it contrasts with the cellular distribution seen in other studied animals, such as cows and rats, indicating a unique aspect of equine reproductive immunology.