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Biomedical subjects

E Golding

Publications and source records attributed to E Golding.

4 recordsLinked to original sources

Continuous venovenous rewarming: results from a juvenile animal model.

OBJECTIVE: To compare a standard and an experimental method of rewarming in 5-wk-old goats with induced moderate hypothermia. DESIGN: Hypothermia was induced in ten juvenile Nubian goats. Five goats were randomly assigned to be rewarmed using standard techniques, and five were assigned to the experimental rewarming technique of a modified continuous venovenous hemofiltration circuit. SETTING: Animal research facility, Greenville Hospital System/Clemson University Biomedical Cooperative, Clemson, S.C. SUBJECTS: Ten 5-wk-old goats. INTERVENTIONS: Hypothermia to a body temperature of 29.4 degrees C was induced in the goats. Each of the control group of five goats was rewarmed using standard methods. Each of the experimental group of five goats was rewarmed using a modified continuous venovenous hemofiltration circuit. MEASUREMENTS AND MAIN RESULTS: At 2 hrs, the median temperature increase in the experimental group was 6.5 degrees C, compared with an increase of only 1.5 degrees C in the control group (p=.02). The mean increase in core body temperature over time (from baseline to 150 mins) was also significantly greater in the experimental group (p=.006). CONCLUSIONS: The use of a modified continuous venovenous hemofiltration circuit for rewarming in a juvenile goat model after induction of moderate hypothermia is more effective than are standard methods.

Age Factors↗

Similar incidence of K-ras mutations in lung carcinomas of FVB/N mice and FVB/N mice carrying a mutant p53 transgene.

Mutated p53 genes are capable of complementing activated ras genes in the transformation of primary rat embryo fibroblasts in vitro. Mutations in both genes have also been found in several human cancers, including lung carcinomas. We generated transgenic mice containing a p53 construct with a missense mutation in exon 5 (ala135val) to study the role of p53 mutations in lung tumorigenesis, and to facilitate identification of other genetic events that might complement p53 mutations in mouse lung carcinogenesis. The p53 transgenic lines exhibited a higher frequency of lethal lung tumors than the parental FVB/N strain. We examined the spontaneously-arising lung carcinomas from mice expressing the mutated p53 transgene for K-ras mutations using single-stranded conformation polymorphism (SSCP) and/or direct sequencing approaches. Fifteen of 29 (52%) carcinomas contained mutations in the K-ras oncogene. Six of 15 of the K-ras mutations were in codon 61 and 9/15 were in codon 12. Subsequent analysis of spontaneous lung carcinomas from mice of the FVB/N parental strain showed that 9/12 (75%) carcinomas examined contained K-ras mutations. Two of these were in codon 12, one in codon 13, and 6 were in codon 61. These results demonstrate that the frequency of ras mutations does not differ between the p53 FVB/N transgenic mice and their parental FVB/N strain but suggest that a high frequency of mutations K-ras can be correlated with lung tumorigenesis in both groups of mice.

Animals↗

The effect of unilateral brain lesion on reasoning.

The results of the Four Card Problem and those of Perceptual Tests were compared in order to tease out the relevance of a "perceptual classification" deficit on reasoning. The prediction that right hemisphere brain lesions would facilitate insight into the problem was upheld. In addition all patients who had a specific perceptual classification deficit solved the problem.

Adult↗