Influence of ethanol on thermoregulation: mapping quantitative trait loci

Area of Science:

• Pharmacogenetics
• Physiology
• Genetics

Background:

• Ethanol significantly impacts thermoregulation, but its genetic underpinnings are not fully understood.
• Recombinant inbred mouse strains offer a powerful tool for dissecting the genetic basis of complex physiological responses.

Purpose of the Study:

• To investigate the genetic basis of ethanol's effects on thermoregulation using genetically distinct mouse strains.
• To identify quantitative trait loci (QTLs) associated with ethanol-induced changes in core body temperature and thermoregulatory disruption.

Main Methods:

• Utilized recombinant inbred mouse strains (C57BL/6J x DBA/2J) to assess responses to ethanol administration (1.5-3.5 g/kg).
• Monitored core body temperature (Tc) and its fluctuations under cyclic ambient temperature conditions.
• Evaluated changes in Tc and tail temperature at a constant ambient temperature (26°C).
• Associated physiological responses with genetic markers to map QTLs.

Main Results:

• Ethanol administration induced significant changes in core body temperature regulation and thermoregulatory disruption across different mouse strains.
• Quantitative trait loci (QTLs) associated with ethanol's effects on thermoregulation were identified, indicating specific chromosomal locations for relevant genes.
• This study provides the first report of QTLs influencing both the regulation and disruption of physiological systems by ethanol.

Conclusions:

• Genetic factors significantly influence how ethanol affects body temperature regulation and thermoregulatory control.
• The identified QTLs provide a foundation for future research into the specific genes and molecular mechanisms underlying ethanol's thermoregulatory effects.
• This research contributes novel insights into the complex interplay between genetics, ethanol, and physiological regulation.