Genetic strain differences in platelet aggregation of laboratory mice

Area of Science:

• * Hematology and Thrombosis Research
• * Mouse Genetics and Physiology

Background:

• * Investigating novel genes and proteins in platelet activation requires understanding baseline physiological functions.
• * Breeding knockout mice necessitates careful selection of parental or backcross strains with specific genetic characteristics.
• * Strain-specific platelet characteristics are vital for accurate interpretation of knockout mouse studies.

Purpose of the Study:

• * To compare platelet aggregation responses across 13 distinct laboratory mouse strains and one diabetic strain.
• * To identify mouse strains with significantly different platelet aggregation capabilities.
• * To highlight the importance of considering strain-specific platelet characteristics in genetic research.

Main Methods:

• * Platelet aggregation was measured in response to adenosine diphosphate (ADP) and collagen.
• * Evaluated both platelet-rich plasma (PRP) aggregation and whole blood aggregation.
• * Determined the platelet aggregation threshold index (PATI) for ADP-induced aggregation.

Main Results:

• * Significant strain-dependent variations in ADP- and collagen-induced platelet aggregation were observed.
• * AKR/J and NZW/N strains showed the highest aggregation responses, while DBA/2 and DBA/1 strains exhibited the lowest.
• * A five-fold difference in PATI for ADP-induced aggregation was noted between AKR/J and DBA/2 strains.

Conclusions:

• * Considerable strain differences in platelet aggregation exist among common laboratory mouse strains.
• * These variations must be accounted for when backcrossing knockout mouse strains for physiological research.
• * Strain selection is critical for the successful and accurate investigation of platelet function and genetics.