The Candida albicans inositol biosynthetic gene and its regulation have been studied. The gene, CalNO1, was cloned on a multicopy vector by complementation of a Saccharomyces cerevisae mutant strain. Southern blot analysis established that the cloned DNA was C. albicans genomic DNA in origin; neither rearrangements nor pseudogenes were evident. Blot hybridization analysis using RNA isolated from C. albicans revealed that a single RNA species (1.8 kilobases) was homologous to the cloned DNA fragment. The steady-state levels of these transcripts were shown to be regulated in response to inositol in the growth media. In addition, the steady-state levels of the RNA encoded by the cloned C. albicans DNA present in S. cerevisiae on a plasmid (YRpCalNO1) were regulated in response to exogenously provided inositol. The cloned C. albicans DNA fragment was shown to restore inositol-1-phosphate synthase activity to a S. cerevisiae mutant strain defective in this enzyme. This activity was also shown to be regulated in response to the presence of inositol in the growth media.

Blotting, Northern↗

PubMedDate not supplied

[Time relationships of radiation-induced chromosome aberrations in humans].

Explore the source record for details and available documents.

Adult↗

PubMedDate not supplied

Chromosome changes in lymphocytes after occupational exposure to pentachlorophenol (PCP).

Chromosome analyses were carried out on peripheral lymphocytes from 22 male workers employed at a pentachlorophenol (PCP) producing factory. As compared with a group of 22 matched controls a small, but significant, increase in the frequency of dicentrics and acentrics was observed. There was no significant increase of sister-chromatid exchange (SCEs) in smoking PCP workers, as compared with smoking controls. Within the control group, smokers had a higher incidence of SCEs than non-smokers.

Air Pollutants↗

PubMedDate not supplied

Fecapentaene causes sister-chromatid exchanges in human lymphocytes.

Fecapentaenes are potent mutagenic compounds found in human feces that are considered as potential colon carcinogens. It is demonstrated that a synthetic racemic all-trans fecapentaene-12 (fec-12) causes a strong dose-dependent increase in the frequency of sister-chromatid exchanges (SCE) in human lymphocytes exposed at different stages of the cell cycle. The SCE-inducing capacity is consistent with published results on the DNA-damaging activity of fec-12 such as formation of DNA single-strand breaks and interstrand cross-links.

Cell Cycle↗

PubMedDate not supplied

Chromosome changes with time in lymphocytes after occupational exposure to toluene.

Chromosome analyses were carried out in peripheral lymphocytes of 27 workers exposed to toluene in a rotogravure plant. At the time of blood sampling all of them had not been exposed to toluene for at least 4 months up to 5 years. Up to 2 years after cessation of exposure to toluene a higher incidence of chromatid-type aberrations could be observed than in controls. After longer post-exposure periods the aberration yields can no longer be distinguished from background level. No differences were revealed in SCE frequencies of smoking or non-smoking workers post toluene exposure compared with the corresponding controls.

Chromosome Aberrations↗

PubMedDate not supplied

[Niikawa-Kuroki syndrome (the so-called Kabuki make up syndrome)].

The first case of Niikawa-Kuroki-syndrome (so called Kabuki-make up-syndrome) in Europe and the second one out of Japan has been reported. It concerns a male child with retardation of growth, mental and motoric development. The syndrome can be diagnosed through the typical dysmorphia of the face, epicanthus, arched eyebrows, broad and depressed nasal tip, large malformed ears and stubby fingers. Anomalies of the dermatoglyphic patterns of the fingers observed in the Japanese patients could not be confirmed in our case. There was a normal chromosomal pattern. No further cases in the family could be found. The etiology of this new syndrome is not yet elucidated.

Abnormalities, Multiple↗