Sökning: "dysgenesis"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet dysgenesis.

  1. 1. Transcriptional regulation of thyroid development possible interplay of endoderm- and mesoderm-derived morphogenetic signals

    Författare :Jessica Westerlund; Göteborgs universitet; []
    Nyckelord :thyroid; congenital hypothyroidism; dysgenesis; Tbx1; Shh; Isl1; Foxa2; C-cells;

    Sammanfattning : Congenital hypothyroidism (CH) affects 1 in 3000 children and is the major cause of treatable mental retardation. Most cases are due to malformations of the gland, collectively named thyroid dysgenesis. The disease results from defective thyroid organogenesis during embryonic life. LÄS MER

  3. 2. Growth and Behaviour : Epigenetic and Genetic Factors Involved in Hybrid Dysgenesis

    Författare :Wei Shi; Reinald Fundele; Diethard Tautz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Interspecies hybridization; hybrid dysgenesis effect; speciation; genomic imprinting; epigenetics; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi;

    Sammanfattning : In mammals, the most frequently observed hybrid dysgenesis effects are growth disturbances and male sterility. Profound defects in placental development have been described and our work on hybrids in genus Mus has demonstrated putative hybrid dysgenesis effects that lead to defects in lipid homeostasis and maternal behavior. LÄS MER

  4. 3. Molecular regulation of thyroid development. New mechanisms of normal and defective morphogenesis

    Författare :Henrik Fagman; Göteborgs universitet; []
    Nyckelord :thyroid; congenital hypothyroidism; thyroid dysgenesis; cadherins; pharyngeal arch arteries; Shh; Tbx1;

    Sammanfattning : Congenital hypothyroidism (CH) is untreated a major cause of mental retardation. The majority of cases are due to malformations of the gland (dysgenesis). Little is known of molecular mechanisms regulating thyroid morphogenesis. LÄS MER

  5. 4. New Functions for Old Genes in the Mouse Placenta

    Författare :Umashankar Singh; Reinald Fundele; Anne C Ferguson-Smith; Uppsala universitet; []
    Nyckelord :Developmental biology; hybrid dysgenesis effects; placental hyperplasia; functional screening; giant cell; glycogen cell; Utvecklingsbiologi;

    Sammanfattning : Different species are separated by pre-zygotic reproductive barriers which impede gene flow between them. Rarely, when pre-zygotic barriers break down, interspecific hybrids are produced that display abnormal phenotypes, collectively called hybrid dysgenesis effects. LÄS MER

  7. 5. The impact of genetic, environmental and life-style factors on male reproductive function

    Författare :Jonas Richthoff; Malmö Reproduktionsmedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; male reproductive function; testicular cancer; smoking; Medicin människa och djur ; Medicine human and vertebrates ; cryptorchidism; sperm concentration;

    Sammanfattning : Recent studies have indicated a decline in sperm number in the western world during the past 50 years, sperm concentration changing from 113 to 66 millions per mL. Furthermore, significant geographical differences in male reproductive function have been observed. LÄS MER