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At least 649 records · Page 36Linked to original sources
PubMed2006

Spectral karyotyping of human, mouse, rat and ape chromosomes--applications for genetic diagnostics and research.

Spectral karyotyping (SKY) is a widely used methodology to identify genetic aberrations. Multicolor fluorescence in situ hybridization using chromosome painting probes in individual colors for all metaphase chromosomes at once is combined with a unique spectral measurement and analysis system to automatically classify normal and aberrant chromosomes. Based on countless studies and investigations in many laboratories worldwide, numerous new chromosome translocations and other aberrations have been identified in clinical and tumor cytogenetics. Thus, gene identification studies have been facilitated resulting in the dissection of tumor development and progression. For example, different translocation partners of the TEL/ETV6 transcription factor that is specially required for hematopoiesis within the bone marrow were identified. Also, the correct classification of complex karyotypes of solid tumors supports the prognostication of cancer patients. Important accomplishments for patients with genetic diseases, leukemias and lymphomas, mesenchymal tumors and solid cancers are summarized and exemplified. Furthermore, studies of disease mechanisms such as centromeric DNA breakage, DNA double strand break repair, telomere shortening and radiation-induced neoplastic transformation have been accompanied by SKY analyses. Besides the hybridization of human chromosomes, mouse karyotyping has also contributed to the comprehensive characterization of mouse models of human disease and for gene therapy studies.

Animals↗
PubMed1978

Correlations between tooth dimensions of man and apes.

Computation of simple, multiple and canonical correlation coefficents between the mesiodistal and buccolingual crown diameters showed a high degree of association between the overall crown dimensions of man and chimpanzee. Information regarding the partitioning of genetic and environmental influences on crown form must therefore await further data regarding the degree of correlation between detailed intra-crown dimensions. Nevertheless, the data from this study suggested that dentitions should be regarded as whole biological entities rather than a series of discrete teeth.

Analysis of Variance↗
PubMed1977

New data and a discussion of infant killing in old world monkeys and apes.

Information on infant killing by males in reviewed and extended by personal communications and observations. Most cases of infant killing reported occurred during periods when a new alpha male was establishing himself and during arranged encounters of strangers or unfamiliar individuals in captivity. There seem to be no specific releasing stimuli for infant killing, but rather the lack of familiarity between male and females, their nonacceptance of him in the whole set of roles tied to the alpha status, and his special motivational condition as new alpha lead him to a state, in which attacks on infants may result. Infant killing is considered to have a selection advantage by increasing one's own reproduction success while reducing the one of other males.

Aggression↗
PubMed1987

Evolution of immunoglobulin allotypes and phylogeny of apes.

Serum samples from 72 Pan troglodytes, 5 Pan paniscus, 22 Gorilla gorilla, 23 Pongo pygmaeus abelii, 5 Pongo pygmaeus pygmaeus, 2 hybrids P.p. abelii X P.p. pygmaeus and 13 Hylobates lar were tested for Gm(1, 2, 3, 5, 6, 10, 11, 13, 14, 15, 16, 17, 21, 24, 28), Km(1) and Bm(1, 2, 3, 4, 5, 6, 7, 8) immunoglobulin allotypes by the classical hemagglutination inhibition method. The distribution of the various alleles and phenotypes makes it possible to distinguish each species or subspecies. Common chimpanzees have the richest polymorphism. Pygmy chimpanzees share common phenotypes with gorillas. Bornean and Sumatran orangutans have their own patterns of polymorphism, as do gibbons. Our principal component plot and dendrogram are compatible with the traditional classification of Hominoidea [e.g. Simpson, Bull. Am. Mus. nat. Hist. 85: 1-350, 1945] in 3 families: Hominidae, Pongidae and Hylobatidae.

Animals↗
PubMed1995

A comparison of radiographic and anatomical evidence of tooth development in infant apes.

This study assesses dental development in a sample of 8 known-age infant orangutans and chimpanzees in order to examine discrepancies between radiographic analyses of tooth development and the actual developing teeth. All crania were radiographed and any developing teeth then extracted for comparison. The height of deciduous teeth was measured both on the radiographs and on the extracted teeth to assess the accuracy of radiographic tooth measurements. A comparison between the radiographic and actual measurements of the deciduous teeth reveals substantial discrepancies. For permanent teeth, the degree of radiographic underestimation of tooth development was found to vary depending on the tooth being studied, its stage of development (early stages are particularly problematic) and the radiographic techniques used. Examination of the dissected teeth also revealed earlier times of onset of calcification for I2(2), C1(1), P3-4(3-4) and M2 than reported in previous studies. For the canine and M2(2), upper and lower homologues appear to begin development at different times, but there is no apparent difference in onset times between other upper and lower homologues.

Aging↗