کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9030712 | 1130940 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of sodium metabisulfite on potassium currents in acutely isolated CA1 pyramidal neurons of rat hippocampus
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کلمات کلیدی
HEPESACSEGTA4-APTTXtetraethylammonium chlorideethylene glycol-bis (2-aminoethylether)-N,N,N′,N′-tetraacetic acid4-aminopyridine - 4-آمینوپیریدینN-2-hydroxyethylpiperazine-N′-2-ethanesulfonic acid - N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acidtetrodotoxin - تترو دوتوکسین Transient outward potassium current - جریان پتاسیم بیرون گذراCNS - دستگاه عصبی مرکزیcentral nervous system - سیستم عصبی مرکزیTEA - چای
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش تغذیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effects of sodium metabisulfite (SMB), a food preservative mostly used in food and drug industries, on voltage-dependent potassium currents in acutely isolated hippocampal CA1 pyramidal neurons of rat were studied using the whole-cell patch-clamp techniques. SMB increased transient outward potassium current (IA) and delayed rectifier potassium current (IK) in a concentration-dependent manner. 10 μM SMB shifted the steady-state activation curve of IK to more negative potentials, and the steady-state inactivation curves of IA and IK to more positive potentials. Time to peak of IA was not affected, but the decay of IA was delayed by SMB. However, the activation and inactivation time constants of IK were both decreased by SMB. These results suggested that SMB differently affected IA and IK, and it would decrease the excitability of hippocampal neuron by increasing potassium currents.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food and Chemical Toxicology - Volume 43, Issue 2, February 2005, Pages 225-232
Journal: Food and Chemical Toxicology - Volume 43, Issue 2, February 2005, Pages 225-232
نویسندگان
Ziqiang Meng, Aifang Nie,