Exploring hemostatic and thrombolytic potential of heynein - A cysteine protease from Ervatamia heyneana latex

Priyanka, U. and Maheshwari, M. and Sharanappa, P. and Nafeesa, Zohara and Vivek, H. K. and Priya, B. S. and Nanjunda Swamy, S. (2017) Exploring hemostatic and thrombolytic potential of heynein - A cysteine protease from Ervatamia heyneana latex. Journal of Ethnopharmacology, 199. 316 - 322. ISSN 1872-7573

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Official URL: https://doi.org/10.1016/j.jep.2016.12.047


Ethnopharmacological relevance The latex of Ervatamia heyneana (Wall.) T. Cooke plant has been used for wound healing and various skin diseases by Indian tribes and folklore. Aim of the study To validate the scientific basis of heynein – a key protease of Ervatamia heyneana, in hemostasis and wound healing process. Materials and methods The latex from E. heyneana was processed and subjected to two step purification. The purified heynein was assayed for proteolytic activity using casein as substrate and also attested by zymography. The inhibition studies confirmed the nature of heynein. Pure fibrinogen was used for fibrinogenolytic activity and citrated plasma was used for coagulant and fibrinolytic activities. The edema inducing action and hemorrhagic activity of heynein were assessed on mice model. Results The purified heynein exhibited proteolytic activity, which was confirmed by caseinolytic assay and zymography. The inhibition studies confirmed heynein to be a cysteine protease. Heynein showed complete hydrolysis of all the three subunits of human fibrinogen (Aα, Bβ, γ). It exhibited strong pro-coagulant activity by reducing plasma clotting time from 248 to 39s at 40µg concentration. Heynein cleaved α polymer subunit in fibrin clot and did not induce edema and hemorrhage in mice models. The non-hemorrhagic nature was supported with histopathological studies of skin samples. Conclusion Heynein displays strong pro-coagulant action associated with fibrin(ogen)olytic activity. This provides basis for the observed pharmacological action of Ervatamia heyneana and thereby justifies its use in folk medicine.

Item Type: Article
Uncontrolled Keywords: (Wall.) T. Cooke, Heynein (cysteine protease), Fibrino(geno)lytic, Pro–coagulant, Hemostasis
Subjects: C Chemical Science > Chemistry
Divisions: Department of > Chemistry
PG Centre Hassan > Bioscience
Depositing User: C Swapna Library Assistant
Date Deposited: 25 Jun 2019 05:47
Last Modified: 28 Jun 2019 06:16
URI: http://eprints.uni-mysore.ac.in/id/eprint/3793

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