Isoangustone A, A Novel Licorice Compound, Inhibits Cell Proliferation by Targeting PI3K, MKK4, and MKK7 in Human Melanoma

Licorice root is known to possess various bioactivities, including anti-inflammatory and anticancer effects. Glycyrrhizin, a triterpene compound, is the most abundant constituent of dried licorice root. However, high intake or long-term consumption of glycyrrhizin causes several side effects, such a...

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Veröffentlicht in:Cancer prevention research (Philadelphia, Pa.) Pa.), 2013-12, Vol.6 (12), p.1293-1303
Hauptverfasser: NU RY SONG, EUNJUNG LEE, ZIGANG DONG, BYUN, Sanguine, KIM, Jong-Eun, MOTTAMAL, Madhusoodanan, JUNG HAN YOON PARK, SOON SUNG LIM, BODE, Ann M, HYONG JOO LEE, KI WON LEE
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container_issue 12
container_start_page 1293
container_title Cancer prevention research (Philadelphia, Pa.)
container_volume 6
creator NU RY SONG
EUNJUNG LEE
ZIGANG DONG
BYUN, Sanguine
KIM, Jong-Eun
MOTTAMAL, Madhusoodanan
JUNG HAN YOON PARK
SOON SUNG LIM
BODE, Ann M
HYONG JOO LEE
KI WON LEE
description Licorice root is known to possess various bioactivities, including anti-inflammatory and anticancer effects. Glycyrrhizin, a triterpene compound, is the most abundant constituent of dried licorice root. However, high intake or long-term consumption of glycyrrhizin causes several side effects, such as hypertension, hypertensive encephalopathy, and hypokalemia. Therefore, finding additional active compounds other than glycyrrhizin in licorice that exhibit anticancer effects is worthwhile. We found that isoangustone A (IAA), a novel flavonoid from licorice root, suppressed proliferation of human melanoma cells. IAA significantly blocked cell-cycle progression at the G1-phase and inhibited the expression of G1-phase regulatory proteins, including cyclins D1 and E in the SK-MEL-28 human melanoma cell line. IAA suppressed the phosphorylation of Akt, GSK-3β, and JNK1/2. IAA also bound to phosphoinositide 3-kinase (PI3K), MKK4, and MKK7, strongly inhibiting their kinase activities in an ATP-competitive manner. Moreover, in a xenograft mouse model, IAA significantly decreased tumor growth, volume, and weight of SK-MEL-28 xenografts. Collectively, these results suggest that PI3K, MKK4, and MKK7 are the primary molecular targets of IAA in the suppression of cell proliferation. This insight into the biologic actions of IAA provides a molecular basis for the potential development of a new chemotherapeutic agent.
doi_str_mv 10.1158/1940-6207.capr-13-0134
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Glycyrrhizin, a triterpene compound, is the most abundant constituent of dried licorice root. However, high intake or long-term consumption of glycyrrhizin causes several side effects, such as hypertension, hypertensive encephalopathy, and hypokalemia. Therefore, finding additional active compounds other than glycyrrhizin in licorice that exhibit anticancer effects is worthwhile. We found that isoangustone A (IAA), a novel flavonoid from licorice root, suppressed proliferation of human melanoma cells. IAA significantly blocked cell-cycle progression at the G1-phase and inhibited the expression of G1-phase regulatory proteins, including cyclins D1 and E in the SK-MEL-28 human melanoma cell line. IAA suppressed the phosphorylation of Akt, GSK-3β, and JNK1/2. IAA also bound to phosphoinositide 3-kinase (PI3K), MKK4, and MKK7, strongly inhibiting their kinase activities in an ATP-competitive manner. 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Hygiene</subject><subject>Public health. Hygiene-occupational medicine</subject><subject>Tumor Cells, Cultured</subject><subject>Tumors of the skin and soft tissue. 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Moreover, in a xenograft mouse model, IAA significantly decreased tumor growth, volume, and weight of SK-MEL-28 xenografts. Collectively, these results suggest that PI3K, MKK4, and MKK7 are the primary molecular targets of IAA in the suppression of cell proliferation. This insight into the biologic actions of IAA provides a molecular basis for the potential development of a new chemotherapeutic agent.</abstract><cop>Philadelphia, PA</cop><pub>American Association for Cancer Research</pub><pmid>24104352</pmid><doi>10.1158/1940-6207.capr-13-0134</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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source MEDLINE; American Association for Cancer Research; EZB-FREE-00999 freely available EZB journals
subjects Animals
Anti-Inflammatory Agents - pharmacology
Apoptosis - drug effects
Biological and medical sciences
Blotting, Western
Cell Adhesion - drug effects
Cell Cycle - drug effects
Cell Proliferation - drug effects
Dermatology
Flow Cytometry
Glycyrrhiza - chemistry
Glycyrrhizic Acid - pharmacology
Humans
Immunoprecipitation
Isoflavones - pharmacology
Male
MAP Kinase Kinase 4 - antagonists & inhibitors
MAP Kinase Kinase 4 - metabolism
MAP Kinase Kinase 7 - antagonists & inhibitors
MAP Kinase Kinase 7 - metabolism
Medical sciences
Melanoma - drug therapy
Melanoma - metabolism
Melanoma - pathology
Mice
Mice, Inbred BALB C
Mice, Nude
Miscellaneous
Models, Molecular
Phosphatidylinositol 3-Kinases - antagonists & inhibitors
Phosphatidylinositol 3-Kinases - metabolism
Phosphorylation - drug effects
Prevention and actions
Public health. Hygiene
Public health. Hygiene-occupational medicine
Tumor Cells, Cultured
Tumors of the skin and soft tissue. Premalignant lesions
Xenograft Model Antitumor Assays
title Isoangustone A, A Novel Licorice Compound, Inhibits Cell Proliferation by Targeting PI3K, MKK4, and MKK7 in Human Melanoma
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