Andrographolide inhibits multiple myeloma cells by inhibiting the TLR4/NF-κB signaling pathway

Gao,Hui; Wang,Jianrong

doi:10.3892/mmr.2015.4703

Andrographolide inhibits multiple myeloma cells by inhibiting the TLR4/NF-κB signaling pathway

Authors:
- Hui Gao
- Jianrong Wang
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Affiliations: Department of Hematology, Dongying People's Hospital of Shandong, Dongying, Shandong 257091, P.R. China, Department of Obstetrics, Dongying People's Hospital of Shandong, Dongying, Shandong 257091, P.R. China
Published online on: December 22, 2015 https://doi.org/10.3892/mmr.2015.4703
Pages: 1827-1832

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Abstract

Andrographolide is an active component from the extract of Andrographis paniculata [(Burm.f) Nees], a medicinal plant from the Acanthaceae family. Pharmacological studies have revealed that andrographolide possesses anti-bacterial, anti-inflammatory, anti-viral, immune regulatory and hepatoprotective properties, and is efficacious in the treatment of cardiovascular diseases, while exhibiting low toxicity and low cost. The present study aimed to determine the inhibitory effects of andrographolide on the growth of multiple myeloma (MM) cells and its possible impact on the Toll-like receptor (TLR)4/nuclear factor (NF)‑κB signaling pathway. Cell proliferation was detected using an MTT assay, cellular apoptosis was measured using flow cytometry, and caspase‑9/3 activation were assessed using colorimetric assay kits. Furthermore, TLR4 and NF‑κB protein expression was determined by western blot analysis. The results revealed that andrographolide reduced the proliferation, while increasing cellular apoptosis and caspase‑9/3 activation of MM cells, in addition to downregulating the expression of TLR4 and NF‑κB protein. Of note, TLR4- or NF-κB-targeting small-interfering (si)RNA enhanced the andrographolide‑induced inhibition of cell proliferation and induction of apoptosis of MM cells. The results of the present study therefore suggested that andrographolide inhibited multiple myeloma cells via the TLR4/NF‑κB signaling pathway.

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