PMID- 35171398 OWN - NLM STAT- MEDLINE DCOM- 20220525 LR - 20220525 IS - 1861-0293 (Electronic) IS - 1340-3443 (Linking) VI - 76 IP - 3 DP - 2022 Jun TI - Saikosaponin B1 and Saikosaponin D inhibit tumor growth in medulloblastoma allograft mice via inhibiting the Hedgehog signaling pathway. PG - 584-593 LID - 10.1007/s11418-022-01603-8 [doi] AB - Medulloblastoma (MB), accounting for nearly 10% of all childhood brain tumors, are implicated with aberrant activation of the Hedgehog (Hh) signaling pathway. Saikosaponin B1 (SSB1) and Saikosaponin D (SSD), two bioactive constituents of Radix Bupleuri, are reported to have many biological activities including anticancer activities. In our work, we evaluated the inhibition of SSB1 and SSD on MB tumor growth in allograft mice and explored the underlying mechanisms. The associated biological activity was investigated in Shh Light II cells, an Hh-responsive fibroblast cell line, using the Dual-Glo((R)) Luciferase Assay System. First, SSB1 (IC(50), 241.8 nM) and SSD (IC(50), 168.7 nM) inhibited GLI-luciferase activity in Shh Light II cells stimulated with ShhN CM, as well as Gli1 and Ptch1 mRNA expression. In addition, both compounds suppressed the Hh signaling activity provoked by smoothened agonist (SAG) or excessive Smoothened (SMO) expression. Meanwhile, SSB1 and SSD did not inhibit glioma-associated oncogene homolog (GLI) luciferase activity activated by abnormal expression of downstream molecules, suppressor of fuse (SUFU) knockdown or GLI2 overexpression. Consequently, SSB1 (30 mg/kg, ip) and SSD (10 mg/kg, ip) displayed excellent in vivo inhibitory activity in MB allografts, and the tumor growth inhibition ratios were approximately 50% and 70%, respectively. Our findings, thus, identify SSB1 and SSD significantly inhibit tumor growth in MB models by inhibiting the Hedgehog pathway through targeting SMO. CI - (c) 2022. The Author(s) under exclusive licence to The Japanese Society of Pharmacognosy. FAU - Luo, Jia AU - Luo J AD - Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, 201203, People's Republic of China. FAU - Wang, Juan AU - Wang J AD - Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, 201203, People's Republic of China. FAU - Yang, Jun AU - Yang J AD - Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, 201203, People's Republic of China. FAU - Huang, Wenjing AU - Huang W AD - Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, 201203, People's Republic of China. FAU - Liu, Junqiu AU - Liu J AD - Laboratory of Medicinal Plant Biotechnology, College of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, 310053, Zhejiang, People's Republic of China. FAU - Tan, Wenfu AU - Tan W AD - Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, 201203, People's Republic of China. wftan@fudan.edu.cn. FAU - Xin, Hong AU - Xin H AD - Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, 201203, People's Republic of China. xinhong@fudan.edu.cn. LA - eng GR - 81573655/National Natural Science Foundation of China/ PT - Journal Article DEP - 20220216 PL - Japan TA - J Nat Med JT - Journal of natural medicines JID - 101518405 RN - 0 (Hedgehog Proteins) RN - 0 (Saponins) RN - 0 (Zinc Finger Protein GLI1) RN - 6SMK8R7TGJ (Oleanolic Acid) RN - UR635J3F00 (saikosaponin D) SB - IM MH - Allografts/metabolism/pathology MH - Animals MH - *Cerebellar Neoplasms/genetics/metabolism/pathology MH - Hedgehog Proteins/genetics/metabolism MH - *Medulloblastoma/drug therapy/genetics/metabolism MH - Mice MH - Oleanolic Acid/analogs & derivatives MH - Saponins MH - Signal Transduction MH - Zinc Finger Protein GLI1/genetics/metabolism OTO - NOTNLM OT - Hedgehog signaling pathway OT - Medulloblastoma OT - Saikosaponin B1 OT - Saikosaponin D OT - Smoothened EDAT- 2022/02/17 06:00 MHDA- 2022/05/26 06:00 CRDT- 2022/02/16 12:17 PHST- 2021/10/21 00:00 [received] PHST- 2022/01/11 00:00 [accepted] PHST- 2022/02/17 06:00 [pubmed] PHST- 2022/05/26 06:00 [medline] PHST- 2022/02/16 12:17 [entrez] AID - 10.1007/s11418-022-01603-8 [pii] AID - 10.1007/s11418-022-01603-8 [doi] PST - ppublish SO - J Nat Med. 2022 Jun;76(3):584-593. doi: 10.1007/s11418-022-01603-8. Epub 2022 Feb 16.