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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Harmine stimulates proliferation of human neural progenitors

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Dakic, Vanja ; Macier, Renata de Moraes ; Drummond, Hannah ; Nascimento, Juliana M. ; Trindade, Pablo ; Rehen, Stevens K.
Total Authors: 6
Document type: Journal article
Source: PeerJ; v. 4, DEC 6 2016.
Web of Science Citations: 14

Harmine is the beta-carboline alkaloid with the highest concentration in the psychotropic plant decoction Ayahuasca. In rodents, classical antidepressants reverse the symptoms of depression by stimulating neuronal proliferation. It has been shown that Ayahuasca presents antidepressant effects in patients with depressive disorder. In the present study, we investigated the effects of harmine in cell cultures containing human neural progenitor cells (hNPCs, 97% nestin-positive) derived from pluripotent stem cells. After 4 days of treatment, the pool of proliferating hNPCs increased by 71.5%. Harmine has been reported as a potent inhibitor of the dual specificity tyrosine-phosphorylation regulated kinase (DYRK1A), which regulates cell proliferation and brain development. We tested the effect of analogs of harmine, an inhibitor of DYRK1A (INDY), and an irreversible selective inhibitor of monoamine oxidase (MAO) but not DYRK1A (pargyline). INDY but not pargyline induced proliferation of hNPCs similarly to harmine, suggesting that inhibition of DYRK1A is a possible mechanism to explain harmine effects upon the proliferation of hNPCs. Our findings show that harmine enhances proliferation of hNPCs and suggest that inhibition of DYRK1A may explain its effects upon proliferation in vitro and antidepressant effects in vivo. (AU)

FAPESP's process: 14/21035-0 - Quantitative proteomics in neural cell lines and organoids derived from induced pluripotent stem cells from schizophrenia patients
Grantee:Juliana Minardi Nascimento
Support type: Scholarships in Brazil - Post-Doctorate