A new open-access study published in the journal Cell Division reports that Qishen Shuangbai formula (QSF), a traditional Chinese medicine composed of eight herbs, suppresses the progression of this disease in laboratory models, and identifies a specific molecular mechanism behind the effect: the formula promotes expression of a receptor protein called ADRA2A, which in turn dampens a growth-promoting signaling pathway known as PI3K/AKT.
The research, published online on 11 September 2026 as a peer-reviewed accepted article, was carried out by Tian Meng, Jieying Zheng, Ning Xiao, Ying Liu, Yuanyuan Zhong, Yifan Cheng, Hongfeng Chen, Meina Ye and colleagues. The team set out to elucidate how QSF inhibits triple-negative breast cancer progression, motivated by earlier observations that traditional Chinese medicine has shown encouraging outcomes against this hard-to-treat cancer subtype.
In the laboratory portion of the study, the researchers worked with two established triple-negative breast cancer cell lines, MDA-MB-231 and BT549. When these cells were treated with QSF at different concentrations, the formula inhibited proliferation, migration, and invasion while enhancing apoptosis—the programmed cell death process that cancer cells often evade. Critically, these effects were concentration-dependent, meaning stronger responses were observed at higher doses of the formula.
To probe the mechanism, the team turned to bioinformatics analysis, which pointed them toward the alpha-2A adrenergic receptor, abbreviated ADRA2A.
The researchers then tested whether ADRA2A was truly required for the formula’s antitumor activity. When they downregulated ADRA2A using lentiviral techniques, the antitumor effect of QSF was weakened in the cancer cells. Conversely, when ADRA2A was knocked down and the cells were treated with LY294002, a well-established chemical inhibitor of PI3K/AKT signaling, the cells showed reduced proliferation, migration, and invasion along with increased apoptosis. This result supports the idea that the pathway acts downstream of ADRA2A and that blocking it can compensate for the loss of the receptor’s expression.
The findings were not limited to cell culture. The team established a xenograft tumor model in nude mice by subcutaneously injecting MDA-MB-231 cells—some infected with lentiviral constructs and some not—and then administered QSF by gavage, a form of oral feeding, to evaluate tumor growth. In these animals, QSF suppressed tumor growth, enhanced apoptosis in tumor tissue, and reduced expression of Ki67, a standard marker of cell proliferation used widely in cancer research.
Taken together, the authors conclude that the inhibition of triple-negative breast cancer progression by QSF is related to the ADRA2A-mediated PI3K/AKT signaling pathway.
Several important caveats apply to these results. The evidence comes from preclinical work—cell lines and a mouse xenograft model—not from clinical trials in patients, so the findings cannot yet be translated into treatment recommendations. The study used specific cell lines and a defined dosing regimen, and the article was shared early as a peer-reviewed accepted version that remains subject to further editorial edits before the final Version of Record appears. Nonetheless, by linking an eight-herb traditional formula to a defined receptor-pathway axis, the study offers a mechanistic starting point for future investigation of QSF and its active components against one of the most challenging breast cancers.
Subject of Research: Mechanism by which the traditional Chinese medicine formula Qishen Shuangbai suppresses triple-negative breast cancer via ADRA2A-mediated PI3K/AKT signaling
Article Title: Qishen Shuangbai formula suppresses triple-negative breast cancer progression through promoting ADRA2A expression
Article References: Meng, T., Zheng, J., Xiao, N., Liu, Y., Zhong, Y., Cheng, Y., Chen, H., & Ye, M. (2026). Qishen Shuangbai formula suppresses triple-negative breast cancer progression through promoting ADRA2A expression. Cell Division. https://doi.org/10.1186/s13008-026-00194-0
Image Credits: AI Generated
DOI: 10.1186/s13008-026-00194-0
Keywords: triple-negative breast cancer, Qishen Shuangbai formula, traditional Chinese medicine, ADRA2A, PI3K/AKT signaling, apoptosis, xenograft model, MDA-MB-231, BT549, LY294002, Ki67, Cell Division
News Source: Nathaniel Bowman. (October 28, 2026). Traditional Chinese Medicine Formula Slows Triple-Negative Breast Cancer Growth by Boosting ADRA2A. Scienmag.
