Opossum Mammary Maturation as It Relates to Immune Cell Infiltration and Nutritional Gene Transcription
| Autor: | B D Fehrenkamp, R D Miller |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
biology Offspring Ontogeny Mammary gland 0402 animal and dairy science 04 agricultural and veterinary sciences Plant Science biology.organism_classification 040201 dairy & animal science Monodelphis domestica Andrology 03 medical and health sciences medicine.anatomical_structure Opossum Lactation medicine biology.protein Animal Science and Zoology Whey Acidic Protein Ecology Evolution Behavior and Systematics 030304 developmental biology Marsupial Research Article |
| Zdroj: | Integrative Organismal Biology (Oxford, England) |
| ISSN: | 2517-4843 |
| Popis: | Synopsis The mammary gland has evolved to accommodate the developmental needs of offspring in species-specific ways. This is particularly true for marsupials. Marsupial milk content changes dramatically throughout lactation in ways appearing timed with neonatal ontogeny and behavior. Here we investigate morphological restructuring within the mammaries throughout lactation in the gray short-tailed opossum, Monodelphis domestica. Substantial remodeling of the mammaries occurs throughout the first half of active lactation. It is not until the latter half of lactation that opossum mammaries appear histologically similar to active eutherian mammaries. Noteworthy was the presence of eosinophils in early developing mammary tissue, which correlated with elevated abundance of transcripts encoding the chemokine IL-16. The presence and abundance of whey protein transcripts within the opossum mammaries were also quantified. Whey acidic protein (WAP) transcript abundance peaked in the latter half of lactation and remained elevated through weaning. Minimal transcripts for the marsupial-specific Early and Late Lactation Proteins (ELP/LLP) were detected during active lactation. Elevated abundance of LLP transcripts was only detected prior to parturition. Overall, the results support the role of eosinophils in mammary restructuring appearing early in mammalian evolution, and describe key similarities and differences in nutritional protein transcript abundance among marsupial species. |
| Databáze: | OpenAIRE |
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