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Updated: Aug 4, 2026

Comparative in vivo Study of gp96 Adjuvanticity in the Frog Xenopus laevis
Published on: September 16, 2010
Frog skin glands, both mucous and granular, exclusively receive adrenergic innervation. Nerve terminal distribution differs ultrastructurally between these gland types, impacting their function.
Area of Science:
- Comparative anatomy
- Neurobiology
- Amphibian physiology
Background:
- Innervation patterns in amphibian skin glands are not fully elucidated.
- Understanding gland innervation is crucial for comprehending physiological regulation.
Purpose of the Study:
- To comparatively analyze the innervation of mucous and granular glands in frog skin.
- To determine the neurotransmitter type and ultrastructural distribution of nerve terminals in these glands.
Main Methods:
- Falck-Hillarp fluorescence technique for catecholamines.
- Cholinesterase staining for nerve identification.
- Transmission electron microscopy for ultrastructural analysis.
Main Results:
- Both mucous and granular glands exhibit exclusively adrenergic innervation.
- Mucous gland nerve terminals are located outside the gland parenchyma, near the basement membrane.
- Granular gland nerve terminals are found between smooth muscle cells and in direct contact with secretory epithelium, within the basement membrane.
Conclusions:
- Adrenergic nerves regulate both mucous and granular glands in frog skin.
- Differential distribution of nerve terminals suggests distinct functional roles and regulatory mechanisms for each gland type.
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