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[Pregnancy-induced changes in adrenergic receptors]
R Tschada1, A Hettenbach, F Melchert
1Urologische Klinik, Universität Heidelberg.
Zeitschrift Fur Geburtshilfe Und Perinatologie
|July 1, 1991
Summary
Pregnancy alters adrenergic receptors in blood cells, with beta-receptors increasing and alpha-receptors decreasing. These changes correlate with estradiol levels and urinary tract dilation, not progesterone.
Area of Science:
- Reproductive Endocrinology
- Cardiovascular Physiology
- Pharmacology
Background:
- Adrenergic receptors play a crucial role in regulating physiological processes.
- Pregnancy involves significant hormonal and physiological adaptations.
- Understanding receptor dynamics during pregnancy is vital for maternal health.
Purpose of the Study:
- To investigate changes in adrenergic receptor concentrations and function during pregnancy.
- To explore the relationship between adrenergic receptor alterations, hormones (estradiol, progesterone), and urinary tract status.
Main Methods:
- Radioligand binding assays and isoprenaline stimulation to measure beta-adrenergic receptors.
- Serum hormone level determination (estradiol, progesterone).
- Nephrosonography to assess the upper urinary tract.
Main Results:
- Beta-adrenergic receptor stimulation and concentration were significantly higher during pregnancy compared to postpartum.
- Alpha-adrenergic receptor concentrations were significantly lower during pregnancy.
- A correlation was observed between pronounced adrenergic receptor alterations, decreased estradiol levels, and increased kidney collecting system dilation.
Conclusions:
- Adrenergic receptor levels undergo significant, measurable alterations during pregnancy.
- The extent of these receptor fluctuations is linked to serum estradiol concentrations and the dilation of smooth muscle organs, such as the urinary tract.