کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9416525 | 1292973 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Detection of β-endorphin in the cerebrospinal fluid after intrastriatal microinjection into the rat brain
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کلمات کلیدی
bSTSIRMECFintracerebroventriculari.c.v.MOR1Volume transmission - انتقال حجمNeurotransmitters, Modulators, Transporters, and Receptors - انتقال دهنده های عصبی، مدولاتورها، حمل کننده ها و گیرنده هاImmunoreactivity - ایمنی فعالradioimmunoassay - رادیوایمونواسیMass spectrometry - طیف سنجی جرمیextracellular fluid - مایع خارج سلولیCSF - مایع مغزی نخاعیCerebrospinal fluid - مایع مغزی نخاعیMigration - مهاجرتDiffusion - واپخش یا انتشار Peptides: anatomy and physiology - پپتیدها: آناتومی و فیزیولوژیGlobus pallidus - گوی رنگ پریده، گلوبوس پالیدوس
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have investigated to what extent microinjected β-endorphin could migrate from the rat brain parenchyma into the CSF compartment. Exogenous rat β-endorphin (0.1 nmol) was microinjected into the left striatum 1 mm from the lateral ventricle in anesthetized male rats. CSF samples were collected at different time points up to 2 h post-injection from a catheter affixed to the atlanto-occipital membrane of the cisterna magna. Radioimmunoassay and mass spectrometry were performed on the CSF samples, and brain sections were immunostained for β-endorphin and μ-opioid receptors. The β-endorphin injected rats showed a marked increase in β-endorphin immunoreactive (IR) material in the CSF, with a peak at 30-45 min post-injection, and this β-endorphin-IR material existed mainly as the intact β-endorphin peptide. The immunohistochemistry results revealed the appearance of distinct β-endorphin-IR cell bodies in the globus pallidus and the bed nucleus of stria terminalis supracapsular part, regions distant from the injection site, at 2 h post-injection of exogenous β-endorphin. The β-endorphin-IR in several of the globus pallidus cell bodies colocalized with the μ-opioid receptor-IR at the cell surface. These findings show that upon delivery of synthetic β-endorphin, there is a significant intracerebral spread of the injected peptide, reaching regions far from the site of injection via diffusion in the extracellular space and flow in the cerebrospinal fluid. This may be of relevance when interpreting studies based on intracerebral injections of peptides, and advances our knowledge regarding the migration of compounds within the brain.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1041, Issue 2, 18 April 2005, Pages 167-180
Journal: Brain Research - Volume 1041, Issue 2, 18 April 2005, Pages 167-180
نویسندگان
Malin Höistad, Jenny Samskog, Kirsten X. Jacobsen, Annika Olsson, Hans-Arne Hansson, Ernst Brodin, Kjell Fuxe,