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European Journal of General Medicine
Medical Investigations Society
ISSN: 1304-3897
Vol. 1, No. 4, 2004, pp. 15-21
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Bioline Code: gm04039
Full paper language: English
Document type: Research Article
Document available free of charge
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European Journal of General Medicine, Vol. 1, No. 4, 2004, pp. 15-21
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ORIGINAL ARTICLE - A STEREOLOGICAL STUDY ON AZUROPHILIC AND SPECIFIC GRANULES IN NEUTROPHILS OF PATIENTS WITH SCHIZOPHRENIA BEFORE AND DURING ANTIPSYCHOTIC TREATMENT
Ibrahim Mohammed Inuwa, Nona Viernes ,Ziad Zaidan
Abstract
Antipsychotic drugs, frequently used for treating schizophrenia, have many unpleasant
and sometimes life threatening side effects. Some of these side effects, such
as agranulocytosis cannot be explained satisfactorily on the basis of the drugs' pharmacological
actions. The first indication of this event is neutropenia which then progresses
to full blown agranulocytosis. This study was carried out to quantitatively
assess neutrophil maturity in patients on antipsychotic drugs using the appearance
of their granules on electronmicroscopy. Blood samples were collected from
schizophrenic patients (n = 20) before and six weeks after starting treatment
with two types of Antipsychotic drugs (Risperidone and Chlorpromazine) and
from healthy subjects (n = 21) having no history of antipsychotic drugs medication
and processed for transmission electron microscopy. Volume density of azurophilic
(electron-dense) granules in patients after treatment was found to be greater
than both before treatment and in control group. The volume weighted mean volume
of granules was significantly greater in cells of patients after treatment.
There were significantly more neutrophils with fewer than three lobes of nuclei
in patients after treatment than in controls or before treatment. These findings
suggest neutrophil cellular immaturity in the patients during 6 weeks of treatment
even though there was no haematological evidence of neutropenia. It is suggested
that immaturity of neutrophils manifests before any evidence of neutropenia.
Keywords
Schizophrenia, antipsychotics, neutrophils
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