Fangchinoline derivatives inhibits PI3K signaling in vitro and in vivo in non-small cell lung cancer
Bibliographic record
Abstract
Abstract Background Cancer is a primary public health problem worldwide today. Tetrandrine (Tet) and fangchinoline (Fan) are extracted from the traditional Chinese medicine Stephania tetrandra S., which are two types of bis-benzyl isoquinoline alkaloids with anti-tumor activity. However, Tet and Fan are not suitable for clinical application due to their high effective doses. Results Through chemical modification, 19 novel Tet and Fan derivatives were firstly proposed and synthesized in this work, and they were assessed for the cytotoxicity against six tumor cell lines (H520, H460, HepG-2, HeLa, A549, and MCF-7) and human bronchial epithelial cells (BEAS-2b) by the CCK-8 assay. Compared to the parent Fan, ten derivatives demonstrated better cytotoxic effects, and 4b exhibited the strongest inhibitory activity against A549 cells growth (IC50 = 0.78 µM) and low toxicity against BEAS-2b cells (IC50 = 17.22 µM). Encouragingly, the IC50 value of compound 4b was 0.78 µM, demonstrating 3.53-fold, 10.22-fold and 12.13-fold more anticancer activity than HCPT, Tet and Fan, respectively. Subsequently, the anti-tumor mechanism of compound 4b was studied by hoechst 33258, flow cytometry, cell scratch, western blotting, and JC-1 staining. The results indicated compound 4b remarkably inhibited the cell migration by decreasing MMP-2 and MMP-9 expression and inhibited the proliferation of A549 cells by arresting the G2/M cell cycle. Meanwhile, compound 4b could also induce A549 cell apoptosis by promoting endogenous pathways of mitochondrial regulation. Subsequently, we simulated the drug stability of compound 4b in vivo, compound 4b showed a hydrolysis half-life of over 8 h in simulated gastric and intestinal fluids. In addition, in vivo experiments in nude mice presented that the growth of tumor tissues was markedly inhibited by the consumption of compound 4b in a dose-dependent manner, and the inhibition rate of the high-dose group (40 mg/kg) was greater than 50%. Regarding the anti-tumor mechanism of compound 4b, it was found that compound 4b could inhibit the mTOR/PI3K/AKT pathway in vivo. Furthermore, the binding mode of BCl-2 and Bax with compound 4b was investigated by performing a molecular docking study. Conclusions In summary, our present study unveiled the antitumor activities of 19 novel derivatives against the normal lung epithelial BESA-2b cells and six cancer cell lines in vitro. Furthermore, the following experiments illuminated that compound 4b could exert antitumor effects and induce apoptosis by regulating the PI3K/Akt/mTOR signaling pathway in vivo through triggering the mitochondria-mediated intrinsic pathways. This newly Fan derivative could exert antitumor effects in vivo and in vitro, which implied that compound 4b would be a prospective new anti-lung cancer drug for future development.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".