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C J Northcott

Publications and source records attributed to C J Northcott.

3 recordsLinked to original sources

Panic disorder in pregnancy.

BACKGROUND: Some reports have suggested that panic disorder may go into remission during pregnancy. The universality of this finding, however, is questionable. In this retrospective survey, we examined the influence of pregnancy on the course of panic disorder in 46 women who developed panic disorder either before, during, or between pregnancies. METHOD: A questionnaire inquired about the clinical course of panic disorder before, during, and after each pregnancy. Additional questions were asked about symptom change following breastfeeding and about caffeine use during pregnancy. The questionnaire was mailed to 138 women with a DSM-III-R diagnosis of panic disorder who had been assessed in our Anxiety Disorders Clinic. RESULTS: Response rate to the questionnaire was 70%. Forty-six women reported a total of 67 pregnancies occurring after the development of panic disorder. Of these pregnancies, 43% were associated with improvement in panic symptoms, 33% with worsening, and 23% with no change. Furthermore, women were unlikely to experience the same outcome (i.e., worsening, improvement, or no change) in subsequent pregnancies. In contrast, the majority (63%) of pregnancies were associated with exacerbation of symptoms in the postpartum period. No association with weaning or caffeine use was detected. CONCLUSION: Our findings suggest that pregnancy may have a highly variable influence on the course of panic disorder. In contrast, postpartum worsening of panic may be a more consistent phenomenon. Implications for pregnancy counseling and management are discussed.

Adult↗

The need for consistent nomenclature and assessment of growth phases in diauxic cultures of Saccharomyces cerevisiae.

The need for consistent nomenclature and accurate assessment of late growth phases in diauxic yeast cultures is highlighted by the substantial variation of stress tolerance in Saccharomyces cerevisiae after the exhaustion of the initial fermentable carbon source. At present, a wide variety of assessment methods and confused terminology exists in the literature, leading to difficulties in the interpretation and comparison of published results. A method based on the depletion of ethanol accumulated during the respiro-fermentative growth phase is suggested as suitable for assessing subsequent growth phases and reporting results. Consistent application of nomenclature for growth phases is recommended to assist the interpretation of published experimental results. It is suggested that the phases of growth in diauxic batch culture should be referred to using the terms (1) initial lag phase, (2) respiro-fermentative phase, (3) diauxic lag phase, (4) respiratory phase, (5) stationary phase, and (6) death phase.

Fermentation↗

Construction of Saccharomyces cerevisiae strains that accumulate relatively low concentrations of trehalose, and their application in testing the contribution of the disaccharide to stress tolerance.

Genetically related diploid strains of Saccharomyces cerevisiae that accumulate varied amounts of trehalose during starvation for nitrogen have been constructed. Strains that produced greater than 5% trehalose (dry cell weight) were more tolerant of thermal, or freeze-thaw stresses than strains that produced less than 4% trehalose. Thus trehalose appears to play a role in stress tolerance of yeast. The significance of these results is that, for the first time, a series of related, unmutated strains have been used to test the effect of trehalose on thermotolerance. Previous studies employed either heat shock treatment, or mutated strains to provide trehalose variations, and as such the contribution of the disaccharide to stress tolerance could not necessarily be separated from other factors such as heat shock proteins.

Hot Temperature↗