Memory T-Cells Contribute to Calcium Release from Bones during Lactation in Mice
| Autor: | Di Wu, Anna Cline-Smith, Brady Chrisler, Brittani Lubeck, Ajit Perla, Sumona Banerjee, Ida Fan, Rajeev Aurora |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Nutrients, Vol 16, Iss 19, p 3289 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2072-6643 19057342 |
| DOI: | 10.3390/nu16193289 |
| Popis: | Objective: Milk production during lactation places a high demand for calcium that is fulfilled both from maternal bone resorption and diet. While it is known that mammary gland-derived PTHrP drives bone resorption during lactation, the impact of postpartum estrogen loss on bone has been unclear. Methods: We used a case-control study design to test the effect of estrogen loss in lactating mice. Results: In the present study, we show for the first time that estrogen loss during lactation activates memory T-cells (TM) to produce TNFα and IL-17A to aid in bone resorption and calcium release. Our studies reveal a new mechanism for the release of calcium from bone postpartum. The findings provide several new insights. First, the immune system plays a critical role in milk production postpartum. Second, evolutionarily, the pathway serves the physiological purpose of increasing bone resorption to release calcium for breastmilk production postpartum but becomes maladaptive postmenopause, leading to osteoporosis. Finally, these results highlight the crosstalk between the brain–bone–breast–endocrine axis and the immune system during lactation. |
| Databáze: | Directory of Open Access Journals |
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