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Serotonin storage in platelets: estimation of storage-packet size
Science (New York, N.Y.)
|February 8, 1974
Summary
Blood platelets store serotonin in storage bodies. Human platelets contain 5.23 x 10^5 serotonin molecules per body (198 nm diameter), while cat platelets hold 31.2 x 10^5 molecules (298 nm diameter).
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Platelets play a crucial role in hemostasis and thrombosis.
- Platelets are known to store and release various bioactive substances, including serotonin.
- Understanding the storage capacity of platelets for serotonin is essential for comprehending platelet function and related disorders.
Purpose of the Study:
- To quantify the number of serotonin molecules stored within platelet storage bodies.
- To determine the relationship between storage body size and serotonin content in different species.
- To provide quantitative data on serotonin storage in human and feline platelets.
Main Methods:
- Estimation of storage-body diameter and volume in blood platelets.
- Quantification of serotonin molecules per storage body using biochemical assays.
- Comparative analysis of serotonin storage in human versus feline platelets.
Main Results:
- Human platelet storage bodies (198 nm diameter) contain an average of 5.23 x 10^5 molecules of serotonin.
- Feline platelet storage bodies (298 nm diameter) contain an average of 31.2 x 10^5 molecules of serotonin.
- A positive correlation exists between storage body size and serotonin content.
Conclusions:
- Platelet storage bodies exhibit species-specific variations in size and serotonin-carrying capacity.
- These findings contribute to a deeper understanding of platelet pharmacology and serotonin transport mechanisms.
- The quantitative data can inform research on platelet-related diseases and therapeutic interventions.