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Amelioration of rhinovirus induced asthma exacerbations by serpin B1

Award Number: R41AI141068
ORGANIZATION: NATIONAL INSTITUTE OF ALLERGY & INFECTIOUS DISEASES
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 06/01/2018
PERIOD OF PERFORMANCE END DATE: 05/31/2019

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Amelioration of rhinovirus induced asthma exacerbations by serpin B1 - PROJECT SUMMARY Asthma exacerbations are a major cause of ER visits and hospitalizations with annual direct costs of approximately $50 billion /year in the USA. Viral infections, in particular rhinoviral (RV) infections, are a major precipitant of asthma exacerbations in allergic asthmatics. As there are over 100 RV serotypes and, for now, no RV vaccine, novel strategies to inhibit RV induced airway inflammation are needed to prevent asthma exacerbations associated with increased airway hyper-reactivity (AHR). State of the art research recently demonstrated that RV infection in allergic humans and mice can induce neutrophils to undergo NETosis – a newly recognized inflammatory process involving the expulsion of Neutrophil Extracellular Traps (NET's) comprising linearized double stranded (ds)DNA bearing cytotoxic histones and granule proteins such as myeloperoxidase and elastase. Furthermore, NET's can be sensed by the innate or adaptive immune system to boost type-2 immunity and enhance the severity of asthma exacerbations. Degradation of NETs by DNase or inhibition of elastase by alpha 1-antitrypsin (AAT) have both proven effective at preventing allergic asthma exacerbations in animal models but neither is a direct inhibitor of NETosis. Serpin B1 (sB1) is a protein both structurally and functionally related to AAT (both inhibit the neutrophil serine proteinases [NSP's] elastase, cathepsin G and proteinase 3 implicated in inflammation and airway hyper-reactivity [AHR]) that is abundantly produced inside monocytes and neutrophils but unlike AAT directly blocks NETosis and regulates the expansion of Th17 cytokine producing cells in vitro. However, Serplus Technology LLC has recently shown that human and mouse sB1's are subject to inactivation by reactive oxygen species (ROS) that convert the protein into an elastase substrate. To prevent this inactivation we have created an oxidation resistant sB1 (OxR sB1) that retains elastase inhibitory activity in the presence of ROS and hypothesize that it will be an effective in vivo inhibitor of both elastase and NETosis during inflammatory episodes and will block RV induced NETosis thus diminishing Th2-mediated T-cell responses to more effectively control allergic asthma exacerbations. We will test if OxR sB1 can prevent RV induced airway inflammation and AHR in house dust mite sensitized mice and, if successful, undertake further preclinical and clinical development such that it may improve control of RV induced asthma exacerbations in allergic asthmatics. The proposed research in phase I will focus on (Aim 1) the purification and biochemical characterization of oxidation resistant mouse sb1a and (Aim 2) providing proof-of-principle in an animal model of RV induced asthma. The outcome of these studies will guide the design of future efficacy studies in animals and humans.


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: 2020 ( Subtotal = -$1,689 )
2020	2018	SERPLUS TECHNOLOGY, LLC	111 INDUSTRIAL WAY STE 9	BELMONT	CA	94002	SAN MATEO	USA	Allergy and Infectious Diseases Research	000	1	11/4/2019	NEW	-$1,689
														Subtotal = -$1,689

Issue Date FY: 2018 ( Subtotal = $223,334 )
2018	2018	SERPLUS TECHNOLOGY, LLC	111 INDUSTRIAL WAY STE 9	BELMONT	CA	94002	SAN MATEO	USA	Allergy and Infectious Diseases Research	000	1	5/22/2018	NEW	$223,334
														Subtotal = $223,334

Grand Total All Awards = $221,645

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Amelioration of rhinovirus induced asthma exacerbations by serpin B1

Award Number: R41AI141068

ORGANIZATION: NATIONAL INSTITUTE OF ALLERGY & INFECTIOUS DISEASES

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

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

PERIOD OF PERFORMANCE START DATE: 06/01/2018

PERIOD OF PERFORMANCE END DATE: 05/31/2019

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