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SUBSTANŢA P ÎN PATOLOGIA DEPRESIVĂ ŞI ANXIOASĂ –<br />

PERSPECTIVE TERAPEUTICE<br />

C. Friedmann<br />

Clinica <strong>de</strong> Psihiatrie, Universitatea „Ovidius” Constanţa<br />

Rezumat<br />

Studiile preclinice au sugerat potenţialul terapeutic al antagoniştilor neurokininici<br />

într-o multitudine <strong>de</strong> condiţii psihiatrice: sindroame algice, schiz<strong>of</strong>renie, sindroame<br />

migrenoi<strong>de</strong>, tulburări anxioase şi <strong>de</strong>presive, etc. Dintre acestea antagoniştii<br />

receptorilor neurokininelor tip 1 (NK1) sunt cei mai atractivi agonişti terapeutici<br />

pentru că ei reprezintă o expresie predominantă în creierul uman.<br />

Produsul MK-869, un antagonist selectiv NK1 ce blochează acţiunea „SP” a<br />

<strong>de</strong>monstrat o eficienţă semnificativă faţă <strong>de</strong> placebo şi mai puţine efecte secundare<br />

<strong>de</strong> ordin sexual <strong>de</strong>cât paroxetina în lotul <strong>de</strong> pacienţi ambulatori cu tulburare<br />

<strong>de</strong>presivă majoră.<br />

„Substanţa P” care este metabolizată <strong>de</strong> enzima <strong>de</strong> conversie a angiotensinei poate<br />

modula şi influenţa evoluţia terapeutică a tulburărilor afective aflate în tratament,<br />

<strong>de</strong>chizând noi perspective <strong>de</strong> interacţionare cu substratul altor boli psihice şi<br />

psihosomatice.<br />

Prezenţa „alelelor D” la subiecţii cu tulburare <strong>de</strong>presivă majoră poate îmbunătăţi<br />

prognosticul evolutiv, dovedind calităţile unui „marker” <strong>de</strong> prognostic al bolii şi <strong>de</strong><br />

calitate al răspunsului terapeutic la tratamentul cu antagonişti <strong>de</strong> receptori NK1.<br />

Cuvinte cheie: substanţa P, receptorii NK1, antagoniştii NK1, gena ACE, alele D.<br />

SUBSTANCE P IN DEPRESSIVE AND ANXIOUS PATHOLOGY –<br />

THERAPEUTICAL PERSPECTIVES<br />

Abstract<br />

Preclinical studies have suggested therapeutic potential <strong>of</strong> neurokinin antagonists in<br />

certain psychiatric disor<strong>de</strong>rs: pain, schizophrenia, anxiety and <strong>de</strong>pression, etc.<br />

Among these, antagonists <strong>of</strong> tachykinin NK1 receptors are the most attractive agents<br />

because they represent a predominant expression in the human brain.<br />

MK-869 compound a selective NK1 receptor antagonist that blocks the action <strong>of</strong><br />

“SP” showed significant efficacy versus placebo and fewer sexual si<strong>de</strong> effects than<br />

paroxetine in outpatients with major <strong>de</strong>pression.<br />

Substance P which is <strong>de</strong>gra<strong>de</strong>d by the angiotensin-converting enzyme (ACE) may<br />

modulate and influence the therapeutic outcome <strong>of</strong> affective disor<strong>de</strong>rs, opening<br />

unexpected new vistas <strong>of</strong> interactions with the substratum <strong>of</strong> other medical<br />

conditions.<br />

A “D-allele” presence in the major <strong>de</strong>pression subjects may lower the <strong>de</strong>pression<br />

scores and improve its outcome, showing marker qualities in the benefit <strong>of</strong> a better<br />

response to NK1 receptor antagonist anti<strong>de</strong>pressant therapy.<br />

Key words: substance P, NK1 receptors, NK1 antagonist, ACE gene, D-allele.<br />

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