Regional differences in serotonin content in the nucleus of the solitary tract of male rats after hypovolemia produced by polyethylene glycol

Table 1 Body weights, hematocrits, changes in volume, and plasma protein concentrations of male rats from the two experiments (tissue 5-HT content and 5-HT immunolabeling) 6 h after sc injection with 0.15 M NaCl vehicle (VEH) or polyethylene glycol (PEG)

	Weight (g)	Hematocrit (%)	Change in volume (%)	Plasma protein concentration (g/dL)
Tissue 5HT content
VEH	461.8 ± 49.4	45.2 ± 0.5		6.0 ± 0.2
PEG	493.7 ± 39.9	54.5 ± 1.8**	−13.19 ± 2.08	8.4 ± 0.2**
5-HT immunolabeling
VEH	544.4 ± 25.4	45.3 ± 0.7		5.9 ± 0.1
PEG	513.8 ± 20.6	52.3 ± 1.1*	−16.96 ± 3.23	7.6 ± 0.3**

Percent change in plasma volume was calculated as 100 × [(100-hematocrit _PEG) − (100-hematocrit_mean _VEH)]/(100-hematocrit_mean _VEH)
Within an experiment, ** significantly greater than VEH (p < 0.001), * significantly greater than VEH (p < 0.01)

ISSN: 1880-6562