Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1432-198X
    Keywords: Key words Turner syndrome ; Renal malformation ; Ultrasonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We evaluated the frequency of renal malformations in relation to nonmosaic 45,X (group A, 45 patients, 54.9%) and mosaic/structural abnormalities of X (group B, 37 patients, 45.1%) in 82 Turkish patients with Turner syndrome (TS). Ultrasonography of the kidneys and collecting system was performed in all patients. Of the 82 patients, 31 had different renal malformations (37.8%). Horse-shoe kidney was observed in 9 (29.0%) of the 31 patients, and 17 patients (54.8%) had various collecting system malformations, while 5 (16.2%) had malrotation and other positional abnormalities. The prevalence of renal malformations was significantly higher in group A (51.1%) than group B (21.6%) (2:7.94, P〈0.05). Although 8 of the 9 patients with horse-shoe kidney had the 45,X karyotype, collecting system malformations were observed more frequently in group B. Recurrent urinary tract infections (UTIs) were detected during follow-up in 7 patients, and hypertension developed in 3 patients. In patients who had a normal baseline nephrological evaluation, no problem suggesting renal disease developed during follow-up. We conclude that all forms of TS should have routine nephrological screening on diagnosis, since structural malformations of the kidney occur more frequently in nonmosaic 45,X TS, while collecting system malformations are mostly seen in mosaic/structural X forms. Those included in the group for nephrological follow-up had an increased risk for hypertension and/or UTI.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The journal of membrane biology 142 (1994), S. 209-216 
    ISSN: 1432-1424
    Keywords: Patch clamp ; GABAA receptor ; Fura-2 ; Intracellular Ca2+ ; Rat cerebellum ; A23187
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The patch clamp technique was used to study the effects of intracellular free calcium ([Ca2+] i ) on GABAA-evoked whole-cell and single channel currents of cultured cerebellar granule cells. Changes in [Ca2+] i were obtained by adding to the extracellular solution the calcium ionophore A23187 (2 μm). The relationship between [Ca2+] i and [Ca2+] O in the presence or absence of A23187 was assessed using fluorimetric measurements from Fura-2 loaded cells. In 2 mm [Ca2+] o and A23187, [Ca2+] i was about 1.5 μm, whereas in the absence of A23187 it was about 250 nm. In whole-cell experiments (symmetrical chloride concentrations) at −50 mV, GABA (0.5 μm) evoked inward currents that did not desensitize. Bath application of A23187 significantly reduced the steady-state amplitude of GABA currents by 37 ± 6%. Single channel currents activated by GABA (0.5 μm) were also recorded in the outside-out configuration of the patch clamp technique. Kinetic analysis of single channel events revealed that A23187 significantly increased the long closed time constant (τ c3) without affecting the open time constants (τ o1 and τ o2) or the short and medium closed time constants (τ c1 and τ c2). Moreover, application of A23187 induced a significant reduction of burst duration (τ b ). We conclude that a rise in [Ca2+] i by A23187 may decrease the binding affinity of GABA for the GABAA receptor. We thank Prof. D. Colquhoun for critical reading of the manuscript and Drs. F. Vittur and M. Fragonas for allowing us the use of the spectrofluorimeter.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...