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Toxicological studies with recombinant hirudin.

H P Klöcking¹, J Güttner, E Fink

¹Institute of Pharmacology and Toxicology, Medical Academy Erfurt, GDR.

Folia Haematologica (Leipzig, Germany : 1928)

|January 1, 1988

Summary

Recombinant hirudin (r-hirudin) showed no adverse effects in animals during a 4-week study. This anticoagulant did not impact growth, behavior, or vital organ function, demonstrating a favorable safety profile.

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Area of Science:

Pharmacology
Toxicology
Hematology

Background:

Hirudin is a potent anticoagulant.
Recombinant hirudin (r-hirudin) offers a potential therapeutic alternative.
Assessing the safety profile of novel anticoagulants is crucial.

Purpose of the Study:

To evaluate the safety and tolerability of recombinant hirudin (r-hirudin) in animal models.
To determine potential adverse effects of daily r-hirudin administration.

Main Methods:

Daily administration of 1 mg/kg r-hirudin for 4 weeks.
Monitoring of animal growth and general behavior.
Hematological analysis (thrombocytes, white blood cells, erythrocytic system).
Assessment of liver and kidney function.
Histopathological examination.
Determination of LD50 via intravenous application.

Main Results:

No significant impact on animal growth or behavior observed.
No treatment-related effects on liver, kidneys, or blood parameters (thrombocytes, leukocytes, erythrocytes).
Absence of hemorrhagic complications, antibody formation, or histopathological changes.
LD50 was determined to be greater than 50 mg/kg for intravenous administration.

Conclusions:

Recombinant hirudin (r-hirudin) demonstrates a favorable safety profile in preclinical studies.
Daily administration of r-hirudin at the tested dosage is well-tolerated.
Further investigation into r-hirudin as an anticoagulant is warranted.

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