Clinical Pharmacology & Therapeutics, Feb 16, 2011
The International Conference on Harmonisation (ICH) is an unparalleled undertaking, which has bro... more The International Conference on Harmonisation (ICH) is an unparalleled undertaking, which has brought together drug regulatory authorities and pharmaceutical trade associations from Europe, Japan, and the United States, to discuss the scientific and technical aspects of medical product registration. Launched in 1990, the value and benefits of ICH to regulators are being realized. ICH has harmonized submission requirements and created a harmonized submission format that is relieving both companies and regulatory authorities of the burdens of assembling and reviewing separate submissions for each region. As more countries embrace ICH guidelines, we anticipate additional benefits, including the promotion of good review practices and, ultimately, a common regulatory language that will facilitate further interactions among global drug regulatory authorities.
In 2005, the World Health Organization (WHO) proposed that provided an active pharmaceutical ingr... more In 2005, the World Health Organization (WHO) proposed that provided an active pharmaceutical ingredient could meet certain criteria, bioequivalence could be evaluated with a set of laboratory tests, obviating the need for expensive and time-consuming pharmacokinetic studies in humans. The aim of this work was to determine whether this so-called "biowaiver" procedure can be applied to antituberculosis products. Antituberculosis products from the WHO Prequalification Programme, including three ethambutol, two isoniazid and one pyrazinamide product, were investigated. In vitro dissolution data for these products were generated according to the biowaiver method stipulated in the WHO Guidance, and the bioequivalence decision based on these data was compared with that based on the corresponding in vivo pharmacokinetic data. In no case was a "false positive" bioequivalence decision reached using the biowaiver procedure, that is, all products deemed bioequivalent according to the biowaiver methods also proved to be bioequivalent in the corresponding pharmacokinetic study. These findings open the way to a simplified method of ensuring bioequivalence of antituberculosis drug products, thereby improving access to high quality antituberculosis medicines for a greater number of patients.
Atipamezole is a new specific alpha 2-adrenoceptor antagonist. In this study, first, the presence... more Atipamezole is a new specific alpha 2-adrenoceptor antagonist. In this study, first, the presence of specific 3H-atipamezole binding sites in the sagittal and coronal sections of mouse brain was established using autoradiography. In vitro experiments with mouse cerebral cortex membranes indicated that d-medetomidine, a new alpha 2-adrenoceptor agonist structurally related to atipamezole, displaces labelled atipamezole more potently than noradrenaline. The saturation isotherm with d-medetomidine demonstrated high affinity binding with the apparent number of binding sites KD 1.36 nM and 760 fmol/mg, respectively. In the next series of experiments male mice were sacrificed immediately after copulation and cerebral cortex 3H-atipamezole and 3H-flumazenil binding was studied. Oxymetazoline and prazosin are known to label preferably alpha 2A and alpha 2B subtypes of alpha 2-adrenoceptors. Therefore, parallelly with noradrenaline both these compounds were used to determine non-specific binding of 3H-atipamezole. When noradrenaline or oxymetazoline were used as displacing agents copulation caused a significant increase of 3H-atipamezole binding sites. No significant changes were observed when prazosin was used. 3H-Flumazenil binding remained unchanged by copulation. The up-regulation of 3H-atipamezole binding sites indicates that not only alpha 2-adrenoceptors in the periphery but also in the CNS may participate in the regulation of sexual behavior. Moreover, in regulation of sexual behavior central alpha 2-adrenoceptors may be more important than benzodiazepine receptors.
Основные лекарства удовлетворяют приоритетные потребности населения в области здравоохранения. По... more Основные лекарства удовлетворяют приоритетные потребности населения в области здравоохранения. Политика, основанная на концепции основных лекарств, имеет решающее значение в улучшении здоровья и достижении устойчивого развития. Цель устойчивого развития 3.8 конкретно упоминает важность «доступности безопасных, эффективных, качественных и доступных по цене основных лекарств и вакцин для всех» в качестве центрального компонента всеобщего охвата медицинской помощью (ВОМП), а цель устойчивого развития 3.b подчёркивает необходимость разработки лекарств для устранения постоянно возникающих пробелов в отношении лечения. Признание важности основных лекарств - не новость. В 1985 г. на конференции в Найроби по рациональному использованию лекарств представители правительств и другие заинтересованные стороны предложили всеобъемлющий комплекс мер по разработке политики в области основных лекарств. Через 30 лет была созвана «Комиссия журнала Ланцет (Lancet) по основным лекарствам» (далее Комиссия) для изучения следующих вопросов: Какого прогресса удалось достичь? Какие проблемы ещё остаются для решения? Какие уроки были извлечены для информирования будущих подходов? И как можно использовать политику в области основных лекарств для продвижения ВОМП и внесения вклада в повестку глобального устойчивого развития? В настоящем докладе рассмотрены эти вопросы с намерением репозиционировать политику в области основных лекарств в повестке глобального развития. Комиссия определила пять областей, имеющих решающее значение для политики в области основных лекарств: оплата корзины основных лекарств, обеспечение ценовой доступности основных лекарств, гарантия их качества и безопасности, мероприятия, способствующие их качественному использованию, и разработка недостающих (отсутствующих) основных лекарств. Комиссия позиционировала политику в области основных лекарств в контексте текущих глобальных дебатов о балансировании политики в области торговли и интеллектуальной собственности с правами человека, об обеспечении безопасности здравоохранения, укреплении систем здравоохранения, ориентированных на людей, и улучшении доступности основных технологий. Во всех областях политики особое внимание было уделено совершенствованию принципов равенства и справедливости в доступе, укреплению соответствующих институтов и созданию подотчётности. В каждой из определённых областей Комиссия сформулировала рекомендации к действию, подтвердив тем самым позицию политики в области основных лекарств в качестве центрального компонента глобального здоровья и здравоохранения и повестки развития.
Peripheral benzodiazepine binding sites on intact lymphocytes using electron microscopic autoradi... more Peripheral benzodiazepine binding sites on intact lymphocytes using electron microscopic autoradiography
Page 1. The patterns of use of antidepressants in Estonia in 1996 TOOMAS MARANDI, VEIKO VASAR, LE... more Page 1. The patterns of use of antidepressants in Estonia in 1996 TOOMAS MARANDI, VEIKO VASAR, LEMBIT RA8GO Marandi T, Vasar V, Rägo L. The patterns of use of antidepressants in Estonia in 1996. Nord J Psychiatry 1998;52:465–473. Oslo. ISSN 0803-9488. ...
Naunyn-schmiedebergs Archives of Pharmacology, Jul 1, 1986
Mice treated with (+/-)baclofen (2 mg/kg i.p.) displayed profound differences to the motor depres... more Mice treated with (+/-)baclofen (2 mg/kg i.p.) displayed profound differences to the motor depressant action of this drug. Mice were divided into three groups termed as responders (20%), moderate responders (65%) and nonresponders (15%). No differences were detected in the spontaneous motor activity between the selected groups. When the animal population in the home cages was kept unchanged the different responses to baclofen were reproducible three weeks after selection. A borderline dose of diazepam (1.5 mg/kg) decreased highly significantly motor activity in baclofen responders but failed to do this in nonresponders group. Ex vivo studies with 3H-flunitrazepam (labelling in vivo and binding carried out in vitro) demonstrated that 3H-flunitrazepam binding in mouse forebrain was significantly smaller in baclofen responders than in nonresponders. Further, the apparent number of 3H-flunitrazepam binding sites in vitro was significantly decreased in the forebrain of baclofen responders. It is concluded that some actions of baclofen depend on the functional state of benzodiazepine recognition sites.
Clinical Pharmacology & Therapeutics, Feb 16, 2011
The International Conference on Harmonisation (ICH) is an unparalleled undertaking, which has bro... more The International Conference on Harmonisation (ICH) is an unparalleled undertaking, which has brought together drug regulatory authorities and pharmaceutical trade associations from Europe, Japan, and the United States, to discuss the scientific and technical aspects of medical product registration. Launched in 1990, the value and benefits of ICH to regulators are being realized. ICH has harmonized submission requirements and created a harmonized submission format that is relieving both companies and regulatory authorities of the burdens of assembling and reviewing separate submissions for each region. As more countries embrace ICH guidelines, we anticipate additional benefits, including the promotion of good review practices and, ultimately, a common regulatory language that will facilitate further interactions among global drug regulatory authorities.
In 2005, the World Health Organization (WHO) proposed that provided an active pharmaceutical ingr... more In 2005, the World Health Organization (WHO) proposed that provided an active pharmaceutical ingredient could meet certain criteria, bioequivalence could be evaluated with a set of laboratory tests, obviating the need for expensive and time-consuming pharmacokinetic studies in humans. The aim of this work was to determine whether this so-called "biowaiver" procedure can be applied to antituberculosis products. Antituberculosis products from the WHO Prequalification Programme, including three ethambutol, two isoniazid and one pyrazinamide product, were investigated. In vitro dissolution data for these products were generated according to the biowaiver method stipulated in the WHO Guidance, and the bioequivalence decision based on these data was compared with that based on the corresponding in vivo pharmacokinetic data. In no case was a "false positive" bioequivalence decision reached using the biowaiver procedure, that is, all products deemed bioequivalent according to the biowaiver methods also proved to be bioequivalent in the corresponding pharmacokinetic study. These findings open the way to a simplified method of ensuring bioequivalence of antituberculosis drug products, thereby improving access to high quality antituberculosis medicines for a greater number of patients.
Atipamezole is a new specific alpha 2-adrenoceptor antagonist. In this study, first, the presence... more Atipamezole is a new specific alpha 2-adrenoceptor antagonist. In this study, first, the presence of specific 3H-atipamezole binding sites in the sagittal and coronal sections of mouse brain was established using autoradiography. In vitro experiments with mouse cerebral cortex membranes indicated that d-medetomidine, a new alpha 2-adrenoceptor agonist structurally related to atipamezole, displaces labelled atipamezole more potently than noradrenaline. The saturation isotherm with d-medetomidine demonstrated high affinity binding with the apparent number of binding sites KD 1.36 nM and 760 fmol/mg, respectively. In the next series of experiments male mice were sacrificed immediately after copulation and cerebral cortex 3H-atipamezole and 3H-flumazenil binding was studied. Oxymetazoline and prazosin are known to label preferably alpha 2A and alpha 2B subtypes of alpha 2-adrenoceptors. Therefore, parallelly with noradrenaline both these compounds were used to determine non-specific binding of 3H-atipamezole. When noradrenaline or oxymetazoline were used as displacing agents copulation caused a significant increase of 3H-atipamezole binding sites. No significant changes were observed when prazosin was used. 3H-Flumazenil binding remained unchanged by copulation. The up-regulation of 3H-atipamezole binding sites indicates that not only alpha 2-adrenoceptors in the periphery but also in the CNS may participate in the regulation of sexual behavior. Moreover, in regulation of sexual behavior central alpha 2-adrenoceptors may be more important than benzodiazepine receptors.
Основные лекарства удовлетворяют приоритетные потребности населения в области здравоохранения. По... more Основные лекарства удовлетворяют приоритетные потребности населения в области здравоохранения. Политика, основанная на концепции основных лекарств, имеет решающее значение в улучшении здоровья и достижении устойчивого развития. Цель устойчивого развития 3.8 конкретно упоминает важность «доступности безопасных, эффективных, качественных и доступных по цене основных лекарств и вакцин для всех» в качестве центрального компонента всеобщего охвата медицинской помощью (ВОМП), а цель устойчивого развития 3.b подчёркивает необходимость разработки лекарств для устранения постоянно возникающих пробелов в отношении лечения. Признание важности основных лекарств - не новость. В 1985 г. на конференции в Найроби по рациональному использованию лекарств представители правительств и другие заинтересованные стороны предложили всеобъемлющий комплекс мер по разработке политики в области основных лекарств. Через 30 лет была созвана «Комиссия журнала Ланцет (Lancet) по основным лекарствам» (далее Комиссия) для изучения следующих вопросов: Какого прогресса удалось достичь? Какие проблемы ещё остаются для решения? Какие уроки были извлечены для информирования будущих подходов? И как можно использовать политику в области основных лекарств для продвижения ВОМП и внесения вклада в повестку глобального устойчивого развития? В настоящем докладе рассмотрены эти вопросы с намерением репозиционировать политику в области основных лекарств в повестке глобального развития. Комиссия определила пять областей, имеющих решающее значение для политики в области основных лекарств: оплата корзины основных лекарств, обеспечение ценовой доступности основных лекарств, гарантия их качества и безопасности, мероприятия, способствующие их качественному использованию, и разработка недостающих (отсутствующих) основных лекарств. Комиссия позиционировала политику в области основных лекарств в контексте текущих глобальных дебатов о балансировании политики в области торговли и интеллектуальной собственности с правами человека, об обеспечении безопасности здравоохранения, укреплении систем здравоохранения, ориентированных на людей, и улучшении доступности основных технологий. Во всех областях политики особое внимание было уделено совершенствованию принципов равенства и справедливости в доступе, укреплению соответствующих институтов и созданию подотчётности. В каждой из определённых областей Комиссия сформулировала рекомендации к действию, подтвердив тем самым позицию политики в области основных лекарств в качестве центрального компонента глобального здоровья и здравоохранения и повестки развития.
Peripheral benzodiazepine binding sites on intact lymphocytes using electron microscopic autoradi... more Peripheral benzodiazepine binding sites on intact lymphocytes using electron microscopic autoradiography
Page 1. The patterns of use of antidepressants in Estonia in 1996 TOOMAS MARANDI, VEIKO VASAR, LE... more Page 1. The patterns of use of antidepressants in Estonia in 1996 TOOMAS MARANDI, VEIKO VASAR, LEMBIT RA8GO Marandi T, Vasar V, Rägo L. The patterns of use of antidepressants in Estonia in 1996. Nord J Psychiatry 1998;52:465–473. Oslo. ISSN 0803-9488. ...
Naunyn-schmiedebergs Archives of Pharmacology, Jul 1, 1986
Mice treated with (+/-)baclofen (2 mg/kg i.p.) displayed profound differences to the motor depres... more Mice treated with (+/-)baclofen (2 mg/kg i.p.) displayed profound differences to the motor depressant action of this drug. Mice were divided into three groups termed as responders (20%), moderate responders (65%) and nonresponders (15%). No differences were detected in the spontaneous motor activity between the selected groups. When the animal population in the home cages was kept unchanged the different responses to baclofen were reproducible three weeks after selection. A borderline dose of diazepam (1.5 mg/kg) decreased highly significantly motor activity in baclofen responders but failed to do this in nonresponders group. Ex vivo studies with 3H-flunitrazepam (labelling in vivo and binding carried out in vitro) demonstrated that 3H-flunitrazepam binding in mouse forebrain was significantly smaller in baclofen responders than in nonresponders. Further, the apparent number of 3H-flunitrazepam binding sites in vitro was significantly decreased in the forebrain of baclofen responders. It is concluded that some actions of baclofen depend on the functional state of benzodiazepine recognition sites.
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