Tacrine and its 7-methoxy derivate; time-change concentration in plasma and brain tissue and basic toxicological profile in rats

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F19%3A50015742" target="_blank" >RIV/62690094:18470/19:50015742 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.tandfonline.com/doi/abs/10.1080/01480545.2019.1566350?journalCode=idct20" target="_blank" >https://www.tandfonline.com/doi/abs/10.1080/01480545.2019.1566350?journalCode=idct20</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/01480545.2019.1566350" target="_blank" >10.1080/01480545.2019.1566350</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tacrine and its 7-methoxy derivate; time-change concentration in plasma and brain tissue and basic toxicological profile in rats

Popis výsledku v původním jazyce

The search for tacrine derivatives, as potential Alzheimer &apos; s disease treatment, is still being at the forefront of scientific efforts. 7-MEOTA was found to be a potent, centrally active acetylcholinesterase inhibitor free of the serious side effects observed for tacrine. Unfortunately, a relevant argumentation about pharmacokinetics and potential toxicity is incomplete; information about tacrine derivatives absorption and especially CNS penetration are still rare as well as detailed toxicological profile in vivo. Although the structural changes between these compounds are not so distinctive, differences in plasma profile and CNS targeting were found. The maximum plasma concentration were attained at 18(th) min (tacrine; 38.20 +/- 3.91 ng/ml and 7-MEOTA; 88.22 +/- 15.19 ng/ml) after i.m. application in rats. Although the brain profiles seem to be similar; tacrine achieved 19.34 +/- 0.71 ng/ml in 27 min and 7-MEOTA 15.80 +/- 1.13 ng/ml in 22 min; the tacrine Kp (AUC(brain)/AUC(plasma)) fit 1.20 and was significantly higher than 7-MEOTA Kp 0.10. Administration of tacrine and 7-MEOTA showed only mild elevation of some biochemical markers following single p.o. application in 24 hours and 7 days. Also histopathology revealed only mild-to-moderate changes following repeated p.o. administration for 14 days. It seems that small change in tacrine molecule leads to lower ability to penetrate through the biological barriers. The explanation that lower p.o. acute toxicity of 7-MEOTA depends only on differences in metabolic pathways may be now revised to newly described differences in pharmacokinetic and toxicological profiles.

Název v anglickém jazyce

Tacrine and its 7-methoxy derivate; time-change concentration in plasma and brain tissue and basic toxicological profile in rats

Popis výsledku anglicky

The search for tacrine derivatives, as potential Alzheimer &apos; s disease treatment, is still being at the forefront of scientific efforts. 7-MEOTA was found to be a potent, centrally active acetylcholinesterase inhibitor free of the serious side effects observed for tacrine. Unfortunately, a relevant argumentation about pharmacokinetics and potential toxicity is incomplete; information about tacrine derivatives absorption and especially CNS penetration are still rare as well as detailed toxicological profile in vivo. Although the structural changes between these compounds are not so distinctive, differences in plasma profile and CNS targeting were found. The maximum plasma concentration were attained at 18(th) min (tacrine; 38.20 +/- 3.91 ng/ml and 7-MEOTA; 88.22 +/- 15.19 ng/ml) after i.m. application in rats. Although the brain profiles seem to be similar; tacrine achieved 19.34 +/- 0.71 ng/ml in 27 min and 7-MEOTA 15.80 +/- 1.13 ng/ml in 22 min; the tacrine Kp (AUC(brain)/AUC(plasma)) fit 1.20 and was significantly higher than 7-MEOTA Kp 0.10. Administration of tacrine and 7-MEOTA showed only mild elevation of some biochemical markers following single p.o. application in 24 hours and 7 days. Also histopathology revealed only mild-to-moderate changes following repeated p.o. administration for 14 days. It seems that small change in tacrine molecule leads to lower ability to penetrate through the biological barriers. The explanation that lower p.o. acute toxicity of 7-MEOTA depends only on differences in metabolic pathways may be now revised to newly described differences in pharmacokinetic and toxicological profiles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30108 - Toxicology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

DRUG AND CHEMICAL TOXICOLOGY

ISSN

0148-0545

e-ISSN

—

Svazek periodika

Neuveden

Číslo periodika v rámci svazku

JUN

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000473962700001

EID výsledku v databázi Scopus

2-s2.0-85068527306