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171.
Location of the first genetic locus, PKDr1, controlling autosomal dominant polycystic kidney disease in Han:SPRD cy/+ rat 总被引:1,自引:0,他引:1
Bihoreau MT; Ceccherini I; Browne J; Kranzlin B; Romeo G; Lathrop GM; James MR; Gretz N 《Human molecular genetics》1997,6(4):609-613
The Han:SPRD cy/+ strain develops a form of slowly progressive disease that
appears similar in many respects to that seen in the autosomal dominant
polycystic kidney disease (ADPKD) in humans. We have performed a total
genome scan in an experimental backcross population derived from affected
Han:SPRD cy/+ rat (PKD) and non-affected Wistar Ottawa Karlsburg rat (WOK)
using 117 microsatellite markers. The genetic dissection of PKD allowed us
to map on rat chromosome 5, a quantitative trait locus (QTL) controlling
PKD, kidney mass and plasma urea concentration. The homology region is
likely to reside on human chromosome 8. The gene responsible for PKD in
Han:SPRD cy/+ rat is neither PKD1, localised on human chromosome 16, nor
PKD2, localised on human chromosome 4. Therefore, we propose that this new
locus be denoted PKDr1. The detection of the PKDr1 locus and associated QTL
should accelerate research into the genetic causes of ADPKD.
相似文献
172.
Somatic mutations are frequent and increase with age in human kidney epithelial cells 总被引:6,自引:0,他引:6
Martin GM; Ogburn CE; Colgin LM; Gown AM; Edland SD; Monnat RJ Jr 《Human molecular genetics》1996,5(2):215-221
We have used a primary cloning assay to determine the frequency of 6-
thioguanine (TG)-resistant tubular epithelial cells in kidney tissue from
72 human donors ranging in age from 2 to 94 years. The frequency of
TG-resistant mutants ranged from approximately 5 x 10(-5) for donors in the
first decade of life to approximately 2.5 x 10(-4) for donors in the eighth
and later decades of life. Two different statistical analyses indicated
that this increase in mutant frequency is exponential with age. We also
observed a 2-fold higher TG-resistant mutant frequency in nephrectomy
kidneys containing a coincident renal carcinoma. DNA sequence analyses
revealed HPRT gene mutations in each of 14 TG-resistant mutants from seven
unrelated donors. Thirteen of these 14 mutants resulted from independent
mutational events. These results suggest that somatic mutations are common
in renal--and perhaps in other human--epithelia, and thus could play an
important role in the genesis of age-associated disease.
相似文献
173.
The optimal equilibration time for mouse embryos frozen by vitrification with trehalose 总被引:2,自引:2,他引:2
Ishida GM; Saito H; Ohta N; Takahashi T; Ito MM; Saito T; Nakahara K; Hiroi M 《Human reproduction (Oxford, England)》1997,12(6):1259-1262
To determine the best equilibration time in the cryoprotectant before rapid
cooling, 8-cell mouse embryos were exposed to a vitrification solution
containing ethylene glycol, Ficoll and trehalose in modified
phosphate-buffered saline at 5 degrees C for varying periods of time. They
were frozen using an ultra rapid freezing method, thawed in a 20 degrees C
water bath and cultured for 24 h with 5-bromo-2-deoxyuridine. Embryo
development and the number of sister chromatid exchanges, a sensitive
indicator of genetic damage, were observed. The results demonstrated that
embryo development after freezing and thawing was similar among the groups
exposed for periods of 5-40 min. However, the number of sister chromatid
exchanges was significantly smaller in the group exposed for 5 min,
indicating that this was the safest equilibration time in the vitrification
solution.
相似文献
174.
Leon Bax Ly-Mee Yu Noriaki Ikeda Harukazu Tsuruta Karel GM Moons 《BMC medical research methodology》2006,6(1):50-11
Background
Meta-analysis has become a well-known method for synthesis of quantitative data from previously conducted research in applied health sciences. So far, meta-analysis has been particularly useful in evaluating and comparing therapies and in assessing causes of disease. Consequently, the number of software packages that can perform meta-analysis has increased over the years. Unfortunately, it can take a substantial amount of time to get acquainted with some of these programs and most contain little or no interactive educational material. We set out to create and validate an easy-to-use and comprehensive meta-analysis package that would be simple enough programming-wise to remain available as a free download. We specifically aimed at students and researchers who are new to meta-analysis, with important parts of the development oriented towards creating internal interactive tutoring tools and designing features that would facilitate usage of the software as a companion to existing books on meta-analysis. 相似文献175.
176.
Quantitative immunoconfocal analysis of human myometrial gap junction connexin43 in relation to steroid hormone concentrations at term labour 总被引:1,自引:0,他引:1
Rezapour M; Kilarski WM; Severs NJ; Gourdie RG; Rothery S; Backstrom T; Roomans GM; Ulmsten U 《Human reproduction (Oxford, England)》1997,12(1):159-166
The aim of this study was to quantify gap junction expression in the human
myometrium in relation to progesterone and oestradiol concentrations, and
to establish whether oxytocin-resistant dystocia is due to an abnormality
in gap junction expression. Three groups of patients were investigated: (i)
before labour (at term), (ii) normal labour and (iii) oxytocin-resistant
dystocia (eight patients per group). For each patient, the concentrations
of oestradiol and progesterone in maternal blood and in myometrial tissue
were measured, and the number and area of immunostained connexin43 gap
junctions per unit volume of tissue determined by quantitative analysis of
digital images obtained by confocal microscopy. No significant difference
in connexin43 gap junction content was observed between the three patient
groups. When all groups were pooled, there was a significant positive
correlation (P < 0.05) between the quantity of immunolabelled gap
junctions and the oestradiol:progesterone ratio, but there was no
significant difference in this correlation between the groups. Gap junction
immunolabelling was not correlated with the progesterone or oestradiol
concentration in the maternal blood or the myometrium. These data suggest
that in human myometrium: (i) dystocia is not due to a reduced level of
immunodetectable connexin43 gap junctions, (ii) onset of labour is not
associated with a sudden increase in immunodetectable gap junction protein
and (iii) gap junctions can be expressed in the presence of high
progesterone concentrations.
相似文献
177.
178.
Lukoye Atwoli Abdullah H. Baqui Thomas Benfield Raffaella Bosurgi Fiona Godlee Stephen Hancocks Richard Horton Laurie Laybourn-Langton Carlos Augusto Monteiro Ian Norman Kirsten Patrick Nigel Praities Marcel GM Olde Rikkert Eric J Rubin Peush Sahni Richard Smith Nicholas J. Talley Sue Turale Damin Vzquez 《传染性疾病的发现RMTC(加拿大)》2021,47(11):442
179.
We report the case of an asthmatic man with HIV infection who was initially diagnosed with HIV treatment-associated lipodystrophy. Further investigations showed he had Cushing's syndrome secondary to 1600 μg of budesonide dry powder inhaler. Cushing's syndrome has not been reported previously on this normal dose of inhaled budesonide. 相似文献
180.