2011-21043. Direct Discovery of HLA Associated Influenza Epitopes Isolated From Human Cells for Vaccine and Therapeutic Evaluation and Development (U01)

AGENCY:

Food and Drug Administration, HHS.

ACTION:

Notice.

SUMMARY:

The Food and Drug Administration (FDA) is announcing the availability of grant funds for the support of a sole source cooperative agreement with the University of Oklahoma Health Sciences Center. The goal of the FDA, Center for Drug Evaluation and Research, Office of Chief Scientist, is to develop technology to molecularly characterize peptide epitopes that are processed and presented on soluble HLA (human leucocyte antigen) expressed by human cells. Initial studies will examine and characterize influenza peptides isolated from several different soluble Class I HLAs produced from influenza infected human lung cell lines. There is a growing interest in developing universal vaccines for influenza by targeting conserved internal proteins to stimulate cross-protective CTLs (cytolytic T lymphocyte) to provide long-lasting immunity. It is therefore critically important to identify which viral epitopes are generated by antigen processing in influenza infected lung cells, the target cells of cell mediated immune response to respiratory viruses. FDA seeks a collaboration to develop this technology for this purpose which can then be applied to identifying and characterizing other HLA-presented epitopes in viral infections, cancer, and immune toxicities.

DATES:

Important dates are as follows:

1. The application due date is September 1, 2011.

2. The anticipated start date is November 1, 2011.

3. The opening date is August 18, 2011.

4. The expiration date is November 2, 2011.

FOR FURTHER INFORMATION AND ADDITIONAL REQUIREMENTS CONTACT:

For Programmatic questions and concerns contact: Michael Norcross, Center for Drug Evaluation and Research, Food and Drug Administration, 9000 Rockville Pike, N29B, Rm. 4NN (HFD 122), Bethesda, MD 20892, Telephone: [phone]; E-mail: [e-mail].

For Financial and Administrative questions and concerns contact: Gladys M. Bohler, Food and Drug Administration, Office of Acquisitions and Grant Services, 5630 Fisher's Lane, Rm. 1078 (HFA 500), Rockville, MD 20857, Telephone: [phone], E-mail: [e-mail].

For more information on this funding opportunity announcement (FOA) and to obtain detailed requirements, please refer to the full FOA located at: http://www.fda.gov/​AboutFDA/​CentersOffices/​CDER/​ucm088761.htm.

SUPPLEMENTARY INFORMATION:

I. Funding Opportunity Description

Funding Opportunity Number: RFA-FD-12-001.

Catalog of Federal Domestic Assistance Number: 93.103.

A. Background

Knowledge on how viral and self proteins are processed and presented in HLA molecules is important to understand how the body defends itself from infection and how immune responses can lead to tissue toxicities. Developing technology to allow direct identification of epitopes bound by HLA molecules is critical to vaccine and therapeutic immune strategies. FDA is interested in collaborative research to develop and implement this technology which will be valuable in evaluation and review of vaccines and therapeutics. Initial studies will address identifying epitopes from influenza that are presented by different HLA alleles in infected lung cells.

Influenza virus infection affects a significant proportion of the population and is associated with serious morbidity and mortality. Although many epitopes can be predicted by computer programs and by screening peripheral blood cells with panels of viral peptides from influenza, the peptides that are presented on the infected target cells in the tissues and the infiltrating T cells that recognize the HLA-peptide complexes are the critical elements to control and recover from infection. The technology of directly identifying viral epitopes in HLA can elucidate viral targets for T cells and provide the foundation for new approaches for rapid development of effective vaccines. More effective vaccines to prevent and control influenza infections will have broad public health benefits by reducing morbidity and mortality of this infectious disease.

B. Research Objectives

For this purpose, a direct epitope elution approach is needed to allow milligram quantities of HLA-peptide complexes to be purified from influenza infected lung cells lines that express soluble HLA. Human lung cell lines engineered to secrete soluble HLA from three supertypes (A*01, A*03, and B*27) should be infected with at least two current influenza strains and HLA collected during infection. HLA will be purified and bound peptides eluted. Influenza peptides should be systematically identified by mass spectrometry analysis and sequencing. Synthetic viral peptides can then be tested for binding to recombinant HLA to verify binding specificity and affinity. Influenza epitopes identified in this initial phase of the project can be evaluated for immunogenicity and antigenicity in follow up studies.

This project will provide the regulatory science to facilitate development and evaluation of direct discovery of HLA presented epitopes. The direct epitope methodology will be applied to current influenza strains initially, but has the flexibility to address novel pandemic strains and other pathological agents.

Goal 1: Identify virus-encoded class I HLA peptides presented during influenza infection of human lung cells.

Goal 2: In vitro validation of class I HLA-presented influenza peptides.

Goal 3: Develop HLA-epitope direct-discovery technology for use in FDA laboratories.

C. Eligibility Information

The technology requires extensive infrastructure for growing cells, purifying HLA from culture supernatants, and for mass spectrometry analysis. Staff at the University of Oklahoma Health Sciences Center are leaders in this technology and have published the first reports on applying this method to influenza. Support of this project will allow the extension of the methodology to examine other HLA types. FDA believes this is a novel and valuable methodology that should be implemented at FDA. Funding this collaborative initiative will allow FDA to acquire the proteomic expertise, training, and tissue culture support to establish a laboratory in the field of immunoproteomics. The direct identification of viral epitopes is critically important to understanding immune responses to infection and vaccination, and there are currently no comparable methods besides the classic screening of vast arrays of overlapping viral peptides on blood lymphocytes. Peptide screening methods only identify possible target epitopes, but do not define which epitopes are expressed in lung tissue. The technology will be valuable for vaccine development and evaluation, and has the flexibility to allow rapid analysis of novel pandemic strains for immunogenic epitopes. The technology can be applied to other infectious diseases, cancer, and immunotoxicities.

II. Award Information/Funds Available

A. Award Amount

Only one grant award will be made in fiscal year (FY) 2012. The application budget is not limited, but it needs to reflect the actual needs of the proposed project. However, presently for FY 2012, the funds are available in the amount of $400,000 (total cost), and are subject to change based on the availability of funds.

B. Length of Support

The maximum period is 1 year with the option of 4 more years of budget support depending on the availability of funds.

III. Paper Application, Registration, and Submission Information

To submit a paper application in response to this FOA, applicants should first review the full announcement located at http://www.fda.gov/​AboutFDA/​CentersOffices/​CDER/​ucm088761.htm. Persons interested in applying for a grant may obtain an application at http://grants2.nih.gov/​grants/​funding/​phs398/​phs398.html. For all paper application submissions, the following steps are required:

• Step 1: Obtain a Dun and Bradstreet (DUNS) Number.
• Step 2: Register With Central Contractor Registration.
• Step 3: Register With Electronic Research Administration (eRA) Commons.

Steps 1 and 2, in detail, can be found at http://www07.grants.gov/​applicants/​organization_​registration.jsp. Step 3, in detail, can be found at https://commons.era.nih.gov/​commons/​registration/​registrationInstructions.jsp. After you have followed these steps, submit paper applications to: Gladys Bohler, Grants Management Specialist (see FOR FURTHER INFORMATION CONTACT section of this document).

Dated: August 9, 2011.

Leslie Kux,

Acting Assistant Commissioner for Policy.