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Bionovo Describes a New Class of Therapeutic Compounds
Date:11/29/2007

- Highly selective estrogen receptor beta agonists have promise for safer

therapies in women's health -

EMERYVILLE, Calif., Nov. 29 /PRNewswire-FirstCall/ -- Bionovo, Inc. (Nasdaq: BNVI) announced today the publication of a groundbreaking paper in the journal Molecular and Cellular Endocrinology covering the isolation, identification and description of a pure chemical compound, liquiritigenin, which represents a new class of therapeutic compounds showing promise for the safe treatment of menopausal symptoms. Liquiritigenin is an active ingredient in Bionovo's drug candidate, MF101, which just successfully completed a Phase 2 study, and is now being prepared for pivotal Phase 3 testing.

The paper, entitled "Liquiritigenin is a plant-derived highly selective estrogen receptor beta agonist" provides details of the selective transcriptional activation of liquiritigenin to the estrogen receptor beta, highlights the advantages of an estrogen receptor beta targeted drug and discusses the isolation and structural identification of the pure chemical compound from Bionovo's MF101.

In brief, the currently available estrogen therapies used to treat menopausal symptoms are non-selective to both of the two known estrogen receptors, alpha and beta. Because of this non-selectivity, all estrogens marketed to treat menopausal symptoms have the potential to cause elevated risks for breast and uterine cancers due to the proliferative effects on breast and uterine tissues mediated through the estrogen receptor alpha. Selective activation of the estrogen receptor beta, however, does not lead to proliferation of MCF-7 breast cancer cell lines or an increase for uterine cancer in mouse xenograph mod
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SOURCE Bionovo, Inc.
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