کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9429420 1615205 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Angiotensin-converting enzyme (ACE) interacts with dopaminergic mechanisms in the brain to modulate prepulse inhibition in mice
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Angiotensin-converting enzyme (ACE) interacts with dopaminergic mechanisms in the brain to modulate prepulse inhibition in mice
چکیده انگلیسی
A renin-angiotensin system, separate to that in the periphery, has been found in the brain. Angiotensin-converting enzyme (ACE) is crucial in the synthesis of angiotensin II, breakdown of bradykinin and the hydrolysis of several other neuropeptides such as enkephalin, substance P, dynorphin and neurotensin. Changes in the levels of ACE have been found in brains of schizophrenia patients, suggesting an involvement of ACE in the illness which awaits further investigation. Prepulse inhibition (PPI) has been suggested to be an operational measure of sensorimotor gating and is disrupted in patients with schizophrenia. We found that ACE knockout mice have increased startle responses but no differences in baseline PPI compared to wildtype controls. Treatment with the dopamine receptor agonist, apomorphine, or the dopamine-releasing drug, amphetamine, produced significant disruption of PPI in control mice but not in ACE knockout mice. Pretreatment with the ACE inhibitor, captopril, which itself did not affect PPI, caused a reduction in the effect of apomorphine on PPI, similar to that seen in the ACE knockout mice. These data suggest an important role of ACE substrates in modulating dopaminergic mechanisms involved in PPI. Further studies are needed to ascertain if angiotensin or other neuropeptides are involved in these interactions and to investigate the neurochemical mechanism behind these effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 380, Issues 1–2, 20–27 May 2005, Pages 6-11
نویسندگان
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