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Intramembranous response to cAMP in fetal epidermis
Cell and Tissue Research
|January 1, 1985
Summary
Fetal epidermis may regulate water permeability. Studies show fetal skin responds to cyclic AMP (cAMP) similarly to osmoregulatory organs, suggesting a role in water balance.
Area of Science:
- Developmental biology
- Cell biology
- Physiology
Background:
- Prekeratinized fetal epidermis is hypothesized to play an osmoregulatory role.
- The function of fetal epidermis in water balance is not well understood.
Purpose of the Study:
- To investigate the structural response of fetal epidermis to cyclic AMP (cAMP).
- To compare the response to known osmoregulatory epithelia.
Main Methods:
- Stimulation of unkeratinized fetal epidermis with cAMP.
- Analysis of intramembranous particle aggregates in the apical plasma membrane.
- Observation of tubular vesicle fusion with the apical plasma membrane.
Main Results:
- cAMP stimulation induced intramembranous particle aggregates in the periderm's apical plasma membrane.
- Tubular vesicles fused with the apical membrane during cAMP stimulation.
- The observed response mirrors that of amphibian urinary bladder and mammalian collecting ducts.
Conclusions:
- Fetal epidermis exhibits structural changes in response to cAMP, similar to water-transporting epithelia.
- These findings suggest fetal epidermis may control and regulate its water permeability.