Natural product-derived therapy for prostate cancer bone metastasis: Kukoamine A (KuA), a spermine alkaloid derived from Cortex lycii radicis and Lycium chinense among others, inhibits the expression of Monoamine oxidase A (MAOA), inhibits Shh-IL6-RANKL signaling network, suppresses tumor-stromal interactions, reduces prostate cancer metastasis and prolongs survival via up regulation of its target gene, 11/April/2017, 12.01 am

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Introduction: What they say:

A study from the Uro-Oncology Research Program, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA shows that “MAOA-Dependent Activation of Shh-IL6-RANKL Signaling Network Promotes Prostate Cancer Metastasis by Engaging Tumor-Stromal Cell Interactions. This study was published in the 13 March 2017 issue of the journal “Cancer Cell” [One of the best journals in Cancer Biology with an I.F of 23.523] by Profs.Jason Boyang Wu, Leland W.K. Chung, and others.


What we say:

On the foundation of this interesting finding, Dr L Boominathan PhD, Director-cum-chief Scientist of GBMD, reports that: Natural product-derived therapy for prostate cancer bone metastasisKukoamine A (KuA), a spermine alkaloid derived from Cortex lycii radicis and Lycium chinense among others, inhibits the expression of Monoamine oxidase A (MAOA), inhibits Shh-IL6-RANKL signaling network, suppresses tumor-stromal interactions, reduces prostate cancer metastasis and prolongs survival via up regulation of its target gene

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From Significance of the study to Public health relevance:

Given that: (i) prostate cancer is one of the most common form of disease in men; and about 1 in 8 will get it in their lifetime; (ii) each year nearly 14 million people are diagnosed with cancer globally; (iii) each year 176,000 cases of prostate cancer are identified in the US, and about 16% of them will die, while in the UK each year 47,000 cases are identified, and about one fourth of them will die; (iv) about 70% of Prostate cancers are deficient in tumor suppressor gene PTEN, the second most mutated gene in human cancer, the first being tumor suppressor Tp53; (v) cancer deaths globally are expected to be doubled in the next decade; (vi) metastasis is the principal reason for most of the cancer deaths; (vii) cancer treatment causes the highest economic loss compared to all the known causes of death worldwide, there is an urgent need to find: (i) a way to activate patients’ immune system against tumors (Cancer immunotherapy); (ii) anticancer drugs that target cancer stem cells that aid in tumor relapse and resistance; (iii) anti-cancer drugs that target cell adhesion molecules that aid in metastatic spread; (iv) a cheaper alternative to the existing expensive anticancer drugs; (v) a side-effect-free natural product-based drug; (vi) increase the therapeutic index of anti-cancer drugs; and (vii) a way to effectively treat and prevent metastatic progression and relapse of advanced/drug-resistant cancers.


What we infer from what they say:

Prof. Wu’s research team has recently shown that: (1) Monoamine oxidase A (MAOA) activates the paracrine Shh-IL6-RANKL signaling; (2) MAOA promotes Prostate cancer bone and visceral metastases; (3) MAOA promotes tumor-stromal cell interactions; and (4) inhibition of MAOA, using antidepressant drug clorgyline, dismantles Shh-IL6-RANKL signaling network and reduces metastasis.


From research findings to therapeutic opportunity :

This study suggests a natural product-derived therapy for prostate cancer metastasis. Kukoamine A (KuA) has been shown to function as an anticancer agent. However, the detailed mechanistic insights is yet to emerge.

Kukoamine A (KuA), by increasing the expression of its target genes, it may decrease the expression of MAOA (fig. 1). Thereby, it may: (i) inhibit paracrine Shh signaling in tumor-stromal interactions; (ii) inhibit secretion of Receptor activator of nuclear factor kappa-B ligand (RANKL) and Interleukin-6 (IL6) by bone-forming cells; (iii) inhibit skeletal colonization and osteoclastogenesis; (iv) dismantle Shh-IL6-RANKL signaling network; (v) inhibit tumor growth in the tumor microenvironment; (vi) reduce bone metastasis; and (vii) promote survival.

Kukoamine A (KuA) inhibits MAOA expression

Figure 1. Mechanistic insights into how Kukoamine A (KuA) suppresses the expression of MAOA to stall prostate cancer bone metastasis.

Thus, pharmacological formulations encompassingKukoamine A (KuA) or its analogues either alone or in combination with other known anticancer drugs” may be used to inhibit prostate cancer bone metastasis.


Details of the Research findings:

Idea Proposed/Formulated (with experimental evidence) by: Dr L Boominathan Ph.D.

Amount: $300#

Undisclosed mechanistic information: How does Kukoamine A (KuA) decrease the expression of MAOA to promote metastatic prostate cancer regression?

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References:

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Citation: Boominathan, L., Natural product-derived therapy for prostate cancer bone metastasis: Kukoamine A (KuA), a spermine alkaloid derived from Cortex lycii radicis and Lycium chinense among others, inhibits the expression of Monoamine oxidase A (MAOA), inhibits Shh-IL6-RANKL signaling network, suppresses tumor-stromal interactions, reduces prostate cancer metastasis and prolongs survival via up regulation of its target gene, 11/April/2017, 12.01 am, Genome-2-Bio-Medicine Discovery center (GBMD), http://genomediscovery.org

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