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[Connections between the submaxillary glands and pancreas]
Zhurnal Evoliutsionnoi Biokhimii I Fiziologii
|July 1, 1980
Summary
Researchers studied how mice synthesize insulin-like protein in submaxillary glands and pancreatic insulin. Glucose significantly boosts the incorporation of 3H-leucine into both proteins, indicating increased synthesis.
Area of Science:
- Biochemistry
- Molecular Biology
- Endocrinology
Background:
- Insulin and insulin-like proteins play crucial roles in metabolic regulation.
- Submaxillary glands are known to produce various proteins, but their role in insulin-like protein synthesis is less understood.
- Understanding the regulation of protein synthesis in response to metabolic cues like glucose is vital.
Purpose of the Study:
- To investigate the in vitro synthesis of insulin-like protein in mouse submaxillary glands.
- To examine the effect of glucose on the incorporation of labeled leucine into pancreatic insulin and submaxillary gland insulin-like protein.
Main Methods:
- In vitro incubation of mouse submaxillary glands and pancreatic tissue.
- Use of 3H-leucine as a tracer to measure protein synthesis rates.
- Quantification of isotope incorporation into specific proteins under varying glucose concentrations.
Main Results:
- Demonstrated de novo synthesis of insulin-like protein within the submaxillary glands via 3H-leucine incorporation.
- Observed a significant, dose-dependent increase in 3H-leucine incorporation into pancreatic insulin (4-fold) and submaxillary insulin-like protein (5-fold) with elevated glucose levels.
Conclusions:
- Submaxillary glands are capable of synthesizing insulin-like protein.
- Glucose acts as a potent stimulator for the synthesis of both pancreatic insulin and insulin-like protein in submaxillary glands.