Utero-placental calcium and magnesium ion channels: A systematic review of obstetric implications of their alterations.
Dysregulation of calcium and magnesium ion channels is linked to various adverse pregnancy outcomes, but more research is needed to understand the clinical implications fully.
Where it sits
this study against the rest of the evuzamitide corpusSummary and findings
This systematic review synthesized data on the role of calcium and magnesium ion channels in uterine and placental functions, analyzing forty-nine studies. The review highlighted the dysregulation of these channels and their association with adverse pregnancy outcomes. Specific ion channels such as L-type and T-type voltage-gated Ca2+ channels were identified as key mediators.
Abstract
Despite the established roles of calcium (Ca2+) and magnesium (Mg2+) in placental function and uterine contractility, limited information exists on how dysregulation of major ion channels contributes to poor pregnancy outcomes. We synthesized data on the consequences of Ca2+ and Mg2+ channelopathies in uterine and placental functions. Using PubMed, Wiley Online, AJOL, and Web of Science databases for article search, a systematic review of forty-nine papers published between 2000 and March 2026 was carried out and reported in accordance with the PRISMA 2020 guideline. Based on the PICO framework, eligible studies involving human, animal, and in vitro designs were chosen and subjected to narrative analysis. L-type and T-type voltage-gated Ca2+ channels, together with transient receptor potential channels, emerged as principal mediators of placental Ca2+ transport and myometrial contractility. Mechanosensitive Piezo1 channels mediate stretch-activated Ca2+ influx, while store-operated Ca2+ entry pathways involving STIM1-Orai1 sustain intracellular Ca2+ homeostasis. Potassium-Ca2+ coupling channels modulated membrane hyperpolarization and anti-labor effects, and intracellular regulators such as PMCA and RYR1 fine-tuned Ca2+ homeostasis. The Mg2+ transporters are essential for preserving Mg2+ homeostasis and regulating Ca2+-dependent excitability. Dysregulation of these ion channel systems was consistently linked to abnormal uterine contractility, preterm birth, preeclampsia, fetal growth restriction, and adverse pregnancy outcomes. Both Ca2+ and Mg2+ ion channelopathies represent both a potential therapeutic target and a mechanistic factor underlying key obstetric complications.
Background
This paper addresses the clinical implications of calcium and magnesium ion channel dysregulation in pregnancy. Prior research has established the importance of these ions in placental function and uterine contractility. Understanding how alterations in ion channels contribute to poor pregnancy outcomes is crucial for developing potential interventions.
Methods
A systematic review was conducted using PubMed, Wiley Online, AJOL, and Web of Science databases. Forty-nine studies published from 2000 to March 2026 were included based on the PICO framework. The review involved human, animal, and in vitro studies and was reported according to the PRISMA 2020 guidelines.
Results
The review found consistent links between dysregulation of Ca<sup>2+</sup> and Mg<sup>2+</sup> ion channels and various adverse pregnancy outcomes. Specific channels such as L-type and T-type voltage-gated Ca<sup>2+</sup> channels were highlighted as key mediators. However, no specific numeric findings or statistical analyses were reported in the abstract.
Interpretation
The findings suggest that ion channel dysregulation may play a significant role in obstetric complications, aligning with prior literature on the importance of calcium and magnesium in pregnancy. However, the lack of quantitative data limits the ability to draw strong clinical implications. The review's reliance on narrative analysis and the potential for biases in the included studies should be considered when interpreting the results.
Key findings
- Dysregulation of Ca2+ and Mg2+ ion channels linked to abnormal uterine contractility, preterm birth, preeclampsia, fetal growth restriction, and adverse pregnancy outcomes.
- Forty-nine papers published between 2000 and March 2026 were reviewed.
- L-type and T-type voltage-gated Ca2+ channels identified as principal mediators of placental Ca2+ transport.
- Mechanosensitive Piezo1 channels mediate stretch-activated Ca2+ influx.
- Store-operated Ca2+ entry pathways involving STIM1-Orai1 sustain intracellular Ca2+ homeostasis.
Limitations
- Narrative analysis without quantitative data.
- Potential biases in included studies.
- No specific effect sizes reported.
- Not all studies may have controlled for confounding factors.