N' alkylamine low molecular mass heparins (LMM-heparin-tyramine and LMM-heparin-tyramine-fitc) exhibit long lasting anticoagulant effects.

Abstract:

:The pharmacodynamic and pharmacokinetic properties of endpoint-attached N'alkylamine derivatives of low molecular mass heparin (LMMH), low molecular mass heparin (LMMH), low molecular mass heparin-tyramine (LMMH-tyr) and low molecular mass heparin-tyramine-fluorescein-5-isothiocyanate (LMMH-tyr-fitc) were investigated ex vivo. After intravenous bolus injection of LMMH, LMMH-tyr and LMMH-tyr-fitc (150 aXa U/kg) to Sprague-Dawley rats (n = 8), LMMH-tyr and LMMH-tyr-fitc displayed decreased clearances. The beta-half-life time of the antifactor Xa (aXa) of "endpoint-attached heparins" was significantly prolonged: LMMH-tyr (125 min), LMMH-tyr-fitc (141 min) compared to LMMH (69 min). The pharmacokinetics of LMMH-tyr-fitc were measured with reversed phase high performance liquid chromatography (RP-HPLC). It showed a decreased clearance and a prolonged half-life time (132 min). The selectively tagged LMMH-tyramine and LMMH-tyramine-fitc may be used to investigate the pharmacokinetics, plasma protein and cellular binding of low molecular mass heparins.

journal_name

Thromb Res

journal_title

Thrombosis research

authors

Malsch R,Piazolo L,Harenberg J,Heene DL

doi

10.1016/0049-3848(95)00172-n

subject

Has Abstract

pub_date

1995-11-01 00:00:00

pages

235-46

issue

3

eissn

0049-3848

issn

1879-2472

pii

0049-3848(95)00172-N

journal_volume

80

pub_type

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