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[Radioautographic study of acid glycoprotein synthesis by tracheal and bronchial glands during ontogeny]
Insights
Acid glycoprotein synthesis in feline respiratory glands changes throughout development. Sulfate incorporation increases before birth, then declines in kittens and old cats, indicating altered synthesis with age.
Area of Science:
- Respiratory physiology
- Glycoprotein synthesis
- Developmental biology
Background:
- Acid glycoproteins are crucial components of respiratory mucus.
- Understanding their synthesis is key to respiratory health.
- Ontogenesis of respiratory gland function requires detailed study.
Purpose of the Study:
- To investigate the radioautographic synthesis of acid glycoproteins in feline respiratory glands during ontogenesis.
- To analyze the quantitative and qualitative changes in glycoprotein synthesis across different life stages.
Main Methods:
- Utilized radioautography with sodium sulfate (35S-sulfate) to trace glycoprotein synthesis.
- Studied synthesis in the tracheal and bronchial glands of cats at various developmental stages.
Main Results:
- 35S-sulfate incorporation increased in fetal glands nearing delivery.
- Postnatal and young kitten stages showed decreased incorporation.
- Tracheal and bronchial glands actively synthesized glycoproteins in young and adult cats.
- Synthesis rates were reduced in old cats.
Conclusions:
- Acid glycoprotein synthesis in feline respiratory glands undergoes significant quantitative and qualitative changes during ontogenesis.
- Age-related alterations in synthesis impact respiratory gland function.
Abstract:
The synthesis of acid glycoproteins in the glands of the respiratory pathway has been studied radioautographically by means of sodium sulfate in the cat ontogenesis. 35S-sulfate incorporation into the fetal gland has been stated to increase by the time of delivery. After birth and in young kittens, 35S-sulfate incorporation into the gland decreases. Acid glycoproteins are intensively synthesized by the tracheal and bronchial gland in young and adult animals. In old animals this process is lowered. The synthesis of acid glycoproteins by the tracheal and bronchial glands in ontogenesis changes both quantitatively and qualitatively.