Artepillin C (ARC) in Brazilian green propolis selectively blocks oncogenic PAK1 signaling and suppresses the growth of NF tumors in mice.
There are mainly three types of propolis whose major anticancer ingredients are entirely different: (1) CAPE (caffeic acid phenethyl ester)-based propolis in Europe, Far East and New Zealand, (2) artepillin C (ARC)-based Brazilian green propolis and (3) Brazilian red propolis. It was shown previously that NF (neurofibromatosis)-associated tumors require the kinase PAK1 for their growth, and CAPE-based propolis extracts such as Bio 30 suppress completely the growth of NF tumors in vivo by blocking PAK1 signaling. Also it was demonstrated that ARC suppresses angiogenesis, suggesting the possibility that ARC also blocks oncogenic PAK1 signaling. Here it is shown for the first time that both ARC and green propolis extract (GPE) indeed block the PAK1 signaling selectively, without affecting another kinase known as AKT. Furthermore, it was confirmed that ARC as well as GPE suppress almost completely the growth of human NF tumor xenografts in mice, as does Bio 30. These results suggest that both CAPE-based and ARC-based propolis extracts are natural anti-PAK1 remedies and could be among the first effective NF therapeutics available on the market. Since more than 70% of human cancers such as breast and prostate cancers require the kinase PAK1 for their growth, it is quite possible that GPE could be potentially useful for the treatment of these cancers, as is Bio 30.
Messerli
Shanta M
SM
Marine Biological Laboratory, Woods Hole, USA.
Ahn
Mok-Ryeon
MR
Kunimasa
Kazuhiro
K
Yanagihara
Miyako
M
Tatefuji
Tomoki
T
Hashimoto
Ken
K
Mautner
Victor
V
Uto
Yoshihiro
Y
Hori
Hitoshi
H
Kumazawa
Shigenori
S
Kaji
Kazuhiko
K
Ohta
Toshiro
T
Maruta
Hiroshi
H
D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology*; D002109:Caffeic Acids / Q000494:pharmacology; D045744:Cell Line, Tumor; D005260:Female; D051379:Mice; D008819:Mice, Nude; D009374:Neoplasms, Experimental / Q000188:drug therapy*; D017253:Neurofibromatoses / Q000188:drug therapy; D010626:Phenylethyl Alcohol / Q000031:analogs & derivatives / Q000494:pharmacology; D010666:Phenylpropionates / Q000494:pharmacology*; D011429:Propolis / Q000494:pharmacology*; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism; D015398:Signal Transduction; D023041:Xenograft Model Antitumor Assays; D054462:p21-Activated Kinases / Q000378:metabolism*
D000970:Antineoplastic Agents; D002109:Caffeic Acids; D010666:Phenylpropionates; C102259:artepillin C; D011429:Propolis; C515903:PAK1 protein, human; D051057:Proto-Oncogene Proteins c-akt; D054462:p21-Activated Kinases; C055494:caffeic acid phenethyl ester; D010626:Phenylethyl Alcohol