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Targeting PCSK9 axis for castration-resistant prostate cancer recurrence suppression

Award Number: R21CA263290
ORGANIZATION: NATIONAL CANCER INSTITUTE
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 03/01/2022
PERIOD OF PERFORMANCE END DATE: 02/28/2025

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Targeting PCSK9 axis for castration-resistant prostate cancer recurrence suppression - SUMMARY Metastatic castration-resistant prostate cancer (mCRPC) is the most recurrent and, fatal phenotype. mCRPC patients have poor recurrence-free and limited preventive options. The natural product pseurotin A (PS) dually suppressed PCSK9 secretion and interaction with LDLR. PS suppressed 94% of PC-3 PC recurrence in nude mice model. PS antimigratory activity significantly reduced when PCSK9 knocked-down. The small molecular size of PS is advantageous over the FDA-approved humanized PCSK9 mAbs acting intra- and extra-cellular unlike the later which can act extracellular only, reflecting better potency. Recently, PCSK9 proved critical driver for prostate and several other cancers. Project central hypothesis is targeting extra- and intracellular PCSK9 axis with the small molecule PCSK9 inhibitor pseurotin A can effectively prevent mCRPC recurrences and therefore PS can be developed as effective recurrence preventer in mCRPC survivors. Aim 1: Efficacy of PS to prevent mCRPC recurrence in nude mice and PCSK9 validation as a pathogenesis marker in human PC tissues microarray. Assessments will compare PS potency in wild and PCSK9- knockdown CWR-R1ca cells in adjuvant (post-primary tumor excision) mode and after neoadjuvant enzultamide- docetaxel regimen followed by primary tumor surgical excision in nude mice models. Biomax human tissue microarray will be used to validate PCSK9 relevance in human PC. Aim 2: Assess the PS safety and pharmacokinetics in Swiss albino mouse models. Expected outcomes: Proposed studies entail PS validation as a novel targeted intervention for mCRPC recurrences prevention. PCSK9 targeting is a novel therapeutic alternative for long-term prevention of metastatic castration-resistant prostate cancer recurrence in prostate cancer survivors.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2025 ( Subtotal = -$19,270 )
2025	2023	UNIVERSITY OF LOUISIANA AT MONROE	700 UNIVERSITY AVENUE	MONROE	LA	71209	OUACHITA	USA	Cancer Treatment Research	000	2	7/2/2025	NON-COMPETING CONTINUATION	-$19,270
														Subtotal = -$19,270

Issue Date FY: 2023 ( Subtotal = $161,499 )
2023	2023	UNIVERSITY OF LOUISIANA AT MONROE	700 UNIVERSITY AVE	MONROE	LA	71209	OUACHITA	USA	Cancer Treatment Research	000	2	2/23/2023	NON-COMPETING CONTINUATION	$161,499
														Subtotal = $161,499

Issue Date FY: 2022 ( Subtotal = $182,419 )
2022	2022	UNIVERSITY OF LOUISIANA AT MONROE	700 UNIVERSITY AVE	MONROE	LA	71209	OUACHITA	USA	Cancer Treatment Research	000	1	1/25/2022	NEW	$182,419
														Subtotal = $182,419

Grand Total All Awards = $324,648

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Targeting PCSK9 axis for castration-resistant prostate cancer recurrence suppression

Award Number: R21CA263290

ORGANIZATION: NATIONAL CANCER INSTITUTE

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

PERIOD OF PERFORMANCE START DATE: 03/01/2022

PERIOD OF PERFORMANCE END DATE: 02/28/2025

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