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71.
S A Al-Awadi A S Teebi D S Krishna Murthy G Othman T S Sundareshan 《Annales de génétique》1986,29(2):119-121
A 35-year-old male was investigated for primary infertility. Clinical examination showed an intelligent man with normal facial appearance and moustache and small firm testes. Testicular histopathology revealed marked atrophy of the testes with no spermatogenesis and absence of germ cells. Hormonal profile showed elevated levels of FSH,LH and low levels of testosterone. Chromosome analysis from whole blood culture showed cells with 46,XX/46,XY/47,XXY/48,XXXY/48,XXYY mosaicism. The predominant cell line was 47,XXY (87.86%). 46,XY/47,XXY mosaicism is not uncommon. However, mosaicism of multiple sex chromosome aneuploidy is rarely observed. This is the first report of mosaicism in Klinefelter's syndrome variant with five cell lines. 相似文献
72.
This report describes an Arab family in which the parents are first cousins and with 5 siblings having multiple pterygium syndrome. The last pregnancy which produced an affected sib was prenatally diagnosed by ultrasonography. Intrafamilial variability of clinical features is discussed. The report stresses the importance of the differentiation between various genetic entities with multiple pterygium. 相似文献
73.
Dejan Maglic Karin Schlegelmilch Antonella FM Dost Riccardo Panero Raffaele A Calogero Fernando D Camargo 《The EMBO journal》2018,37(17)
The mammalian Hippo signaling pathway, through its effectors YAP and TAZ, coerces epithelial progenitor cell expansion for appropriate tissue development or regeneration upon damage. Its ability to drive rapid tissue growth explains why many oncogenic events frequently exploit this pathway to promote cancer phenotypes. Indeed, several tumor types including basal cell carcinoma (BCC) show genetic aberrations in the Hippo (or YAP/TAZ) regulators. Here, we uncover that while YAP is dispensable for homeostatic epidermal regeneration, it is required for BCC development. Our clonal analyses further demonstrate that the few emerging Yap‐null dysplasia have lower fitness and thus are diminished as they progress to invasive BCC. Mechanistically, YAP depletion in BCC tumors leads to effective impairment of the JNK‐JUN signaling, a well‐established tumor‐driving cascade. Importantly, in this context, YAP does not influence canonical Wnt or Hedgehog signaling. Overall, we reveal Hippo signaling as an independent promoter of BCC pathogenesis and thereby a viable target for drug‐resistant BCC. 相似文献
74.
Direct conversion of peracylated N1-(β-d-glucopyranosyl)-2-thiouracil derivatives into the corresponding anhydrothionucleosides has been studied under various conditions including: gas-phase pyrolysis, heating without a solvent, and by heating in a solvent of high boiling point (DPE) in the presence of a base (DABCO) and reaction in a microwave reactor. Heating at 210-220 °C was found to give the best yield of a single isomer. The structures of the new anhydrothionucleosides were confirmed by NMR techniques. 相似文献
75.
Sameera Al-Awadi M. Afzal S. Oommen 《The Journal of steroid biochemistry and molecular biology》2001,78(5):493-498
When Bacillus stearothermophilus, a thermophilic bacterium isolated from the Kuwaiti desert, was incubated with exogenous progesterone for 24 h, three monohydroxylated metabolites were produced. 20-Hydroxyprogesterone was the major metabolite produced in 60.8 relative percentage yield. The other two monohydroxylated metabolites were identified as 6β-hydroxyprogesterone and the rare 6-hydroxyprogesterone in 21.0 and 13.6 relative percentage yields, respectively. A new metabolite 9,10-seco-4-pregnene-3,9,20-trione was isolated in 3.7 relative percentage yield. All metabolites were purified by preparative TLC and HPLC followed by their identification using 1H, 13C NMR and other spectroscopic data. 相似文献
76.
R H Waldman P A Wigley FM Small 《Journal of immunology (Baltimore, Md. : 1950)》1970,105(6):1477-1483
77.
Two genes are known to be involved in spinal muscular atrophy (SMA), namely, SMN (survival motor neuron) and NAIP (neuronal
apoptosis inhibitory protein). Deletion analysis of these genes has been reported for many ethnic groups. We have extended
this analysis to include 15 Arabic patients (11 unrelated cases of type I, which represent practically all of the patients
diagnosed within the last 2 years in Kuwait, and 4 type-II cases from a single kinship). Also, 41 healthy relatives (parents
and sibs) and 44 control individuals of Arabic origin were analyzed. The homozygous deletions of exons 7 and 8 of the SMN
gene were found in all SMA patients studied. Exon 5 of NAIP was homozygously absent in all type-I patients, but was retained
in type-II cases. Among members of SMA families, one mother was found to be homozygously deleted for NAIP. All of the control
individuals had both normal SMN and NAIP. Our results are in agreement with the general consensus that the incidence of NAIP
deletion is higher in the more severe SMA cases. Furthermore, they suggest that SMA type-I chromosomes, with the dual deletion
of the SMN and NAIP genes, are more common in Arabs than in patients of other ethnic origin.
Received: 23 April 1996 / Revised: 17 June 1996 相似文献