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R44AI179564

Project Grant

Overview

Grant Description
XVIR-110 an ultra-long-acting INSTI for HIV pre-exposure prophylaxis in IND-enabling studies - project summary.

While there are now successful treatment regimens and prevention strategies for people living with HIV/AIDS, the HIV pandemic remains a public health crisis in the United States and worldwide, with nearly 40,000 new infections each year in the US alone.

To prevent the spread of HIV in vulnerable populations, the US Preventive Services Task Force has recommended HIV pre-exposure prophylaxis (PREP) for all adults and adolescents at risk of HIV acquisition.

Although current antiretroviral drug regimens are potent and well-tolerated, enabling the life-long suppression of HIV-1 infection and the prevention of HIV-1 infection in individuals at high risk, compliance rates are low.

Long-acting antiretroviral drugs (ARVs) have the potential to improve drug adherence, reduce viral transmission, prevent new infections, and limit the emergence of viral drug resistance and systemic toxicities.

However, the key challenge for using long-acting ARVs is to extend the dosing interval to reduce the pressure on the healthcare facilities, which are set up for every six-month clinic visits. This challenge likely reduces compliance, particularly in the PREP setting.

Poor compliance has been shown to increase infection rates and the possibility of developing drug resistance.

EXAVIR THERAPEUTICS, INC has created an "ULTRA" long-acting ARV by developing an ultra-long-acting, nanoformulated injectable prodrug to overcome this challenge.

Building upon our Phase I equivalent data, we proposed in this Direct-to-Phase II SBIR project to further develop our drug by 1) completing the chemistry, manufacturing, and controls development of the drug substance and drug product, 2) completing IND-enabling studies, and 3) obtaining FDA IND approval.

Upon completion, this Direct-to-Phase II SBIR project will enable the submission of an IND to the FDA for approval and preparation of our Phase I first-in-human clinical trial.

If successful, the impact of our novel "ULTRA" long-acting ARV on HIV-1 prevention and quality of life for individuals already infected with HIV-1 will be far-reaching in real-world settings.
Funding Goals
TO ASSIST PUBLIC AND PRIVATE NONPROFIT INSTITUTIONS AND INDIVIDUALS TO ESTABLISH, EXPAND AND IMPROVE BIOMEDICAL RESEARCH AND RESEARCH TRAINING IN INFECTIOUS DISEASES AND RELATED AREAS, TO CONDUCT DEVELOPMENTAL RESEARCH, TO PRODUCE AND TEST RESEARCH MATERIALS. TO ASSIST PUBLIC, PRIVATE AND COMMERCIAL INSTITUTIONS TO CONDUCT DEVELOPMENTAL RESEARCH, TO PRODUCE AND TEST RESEARCH MATERIALS, TO PROVIDE RESEARCH SERVICES AS REQUIRED BY THE AGENCY FOR PROGRAMS IN INFECTIOUS DISEASES, AND CONTROLLING DISEASE CAUSED BY INFECTIOUS OR PARASITIC AGENTS, ALLERGIC AND IMMUNOLOGIC DISEASES AND RELATED AREAS. PROJECTS RANGE FROM STUDIES OF MICROBIAL PHYSIOLOGY AND ANTIGENIC STRUCTURE TO COLLABORATIVE TRIALS OF EXPERIMENTAL DRUGS AND VACCINES, MECHANISMS OF RESISTANCE TO ANTIBIOTICS AS WELL AS RESEARCH DEALING WITH EPIDEMIOLOGICAL OBSERVATIONS IN HOSPITALIZED PATIENTS OR COMMUNITY POPULATIONS AND PROGRESS IN ALLERGIC AND IMMUNOLOGIC DISEASES. BECAUSE OF THIS DUAL FOCUS, THE PROGRAM ENCOMPASSES BOTH BASIC RESEARCH AND CLINICAL RESEARCH. SMALL BUSINESS INNOVATION RESEARCH (SBIR) PROGRAM EXPANDS AND IMPROVES PRIVATE SECTOR PARTICIPATION IN BIOMEDICAL RESEARCH. THE SBIR PROGRAM INTENDS TO INCREASE AND FACILITATE PRIVATE SECTOR COMMERCIALIZATION OF INNOVATIONS DERIVED FROM FEDERAL RESEARCH AND DEVELOPMENT, TO INCREASE SMALL BUSINESS PARTICIPATION IN FEDERAL RESEARCH AND DEVELOPMENT, AND TO FOSTER AND ENCOURAGE PARTICIPATION OF SOCIALLY AND ECONOMICALLY DISADVANTAGED SMALL BUSINESS CONCERNS AND WOMEN-OWNED SMALL BUSINESS CONCERNS IN TECHNOLOGICAL INNOVATION. THE SMALL BUSINESS TECHNOLOGY TRANSFER (STTR) PROGRAM STIMULATES AND FOSTERS SCIENTIFIC AND TECHNOLOGICAL INNOVATION THROUGH COOPERATIVE RESEARCH AND DEVELOPMENT CARRIED OUT BETWEEN SMALL BUSINESS CONCERNS AND RESEARCH INSTITUTIONS, TO FOSTER TECHNOLOGY TRANSFER BETWEEN SMALL BUSINESS CONCERNS AND RESEARCH INSTITUTIONS, TO INCREASE PRIVATE SECTOR COMMERCIALIZATION OF INNOVATIONS DERIVED FROM FEDERAL RESEARCH AND DEVELOPMENT, AND TO FOSTER AND ENCOURAGE PARTICIPATION OF SOCIALLY AND ECONOMICALLY DISADVANTAGED SMALL BUSINESS CONCERNS AND WOMEN-OWNED SMALL BUSINESS CONCERNS IN TECHNOLOGICAL INNOVATION. RESEARCH CAREER DEVELOPMENT AWARDS SUPPORT THE DEVELOPMENT OF SCIENTISTS DURING THE FORMATIVE STAGES OF THEIR CAREERS. INDIVIDUAL NATIONAL RESEARCH SERVICE AWARDS (NRSAS) ARE MADE DIRECTLY TO APPROVE APPLICANTS FOR RESEARCH TRAINING IN SPECIFIED BIOMEDICAL SHORTAGE AREAS. IN ADDITION, INSTITUTIONAL NATIONAL RESEARCH SERVICE AWARDS ARE MADE TO ENABLE INSTITUTIONS TO SELECT AND MAKE AWARDS TO INDIVIDUALS TO RECEIVE TRAINING UNDER THE AEGIS OF THEIR INSTITUTIONAL PROGRAM.
Place of Performance
San Francisco, California 941113823 United States
Geographic Scope
Single Zip Code
Analysis Notes
Amendment Since initial award the total obligations have increased 190% from $1,049,975 to $3,049,975.
Exavir Therapeutics was awarded Ultra-Long-Acting INSTI HIV Pre-Exposure Prophylaxis: IND-Enabling Studies Project Grant R44AI179564 worth $3,049,975 from the National Institute of Allergy and Infectious Diseases in August 2023 with work to be completed primarily in San Francisco California United States. The grant has a duration of 3 years and was awarded through assistance program 93.855 Allergy and Infectious Diseases Research. The Project Grant was awarded through grant opportunity PHS 2022-2 Omnibus Solicitation of the NIH, CDC and FDA for Small Business Innovation Research Grant Applications (Parent SBIR [R43/R44] Clinical Trial Not Allowed).

SBIR Details

Research Type
SBIR Phase II
Title
XVIR-110 an ultra-long-acting INSTI for HIV pre-exposure prophylaxis in IND-enabling studies
Abstract
PROJECT SUMMARY While there are now successful treatment regimens and prevention strategies for people living with HIV/AIDS, the HIV pandemic remains a public health crisis in the United States and worldwide, with nearly 40,000 new infections each year in the US alone. To prevent the spread of HIV in vulnerable populations, the US Preventive Services Task Force has recommended HIV pre-exposure prophylaxis (PrEP) for all adults and adolescents at risk of HIV acquisition. Although current antiretroviral drug regimens are potent and well-tolerated, enabling the life-long suppression of HIV-1 infection and the prevention of HIV-1 infection in individuals at high risk, compliance rates are low. Long-acting antiretroviral drugs (ARVs) have the potential to improve drug adherence, reduce viral transmission, prevent new infections, and limit the emergence of viral drug resistance and systemic toxicities. However, the key challenge for using long-acting ARVs is to extend the dosing interval to reduce the pressure on the healthcare facilities, which are set up for every six-month clinic visits. This challenge likely reduces compliance, particularly in the PrEP setting. Poor compliance has been shown to increase infection rates and the possibility of developing drug resistance. Exavir Therapeutics, Inc has created an “ultra” long- acting ARV by developing an ultra-long-acting, nanoformulated injectable prodrug to overcome this challenge. Building upon our Phase I equivalent data, we proposed in this Direct-to-Phase II SBIR project to further develop our drug by 1) completing the Chemistry, Manufacturing, and Controls development of the drug substance and drug product, 2) completing IND-enabling studies, and 3) obtaining FDA IND approval. Upon completion, this Direct-to-Phase II SBIR project will enable the submission of an IND to the FDA for approval and preparation of our Phase I first-in-human clinical trial. If successful, the impact of our novel “ultra” long-acting ARV on HIV-1 prevention and quality of life for individuals already infected with HIV-1 will be far-reaching in real-world settings.
Topic Code
NIAID
Solicitation Number
PA22-176

Status
(Ongoing)

Last Modified 9/5/25

Period of Performance
8/17/23
Start Date
7/31/26
End Date
70.0% Complete

Funding Split
$3.0M
Federal Obligation
$0.0
Non-Federal Obligation
$3.0M
Total Obligated
100.0% Federal Funding
0.0% Non-Federal Funding

Activity Timeline

Interactive chart of timeline of amendments to R44AI179564

Transaction History

Modifications to R44AI179564

Additional Detail

Award ID FAIN
R44AI179564
SAI Number
R44AI179564-125650979
Award ID URI
SAI UNAVAILABLE
Awardee Classifications
Small Business
Awarding Office
75NM00 NIH National Institute of Allergy and Infectious Diseases
Funding Office
75NM00 NIH National Institute of Allergy and Infectious Diseases
Awardee UEI
EV9JGJL7VVF9
Awardee CAGE
9F4N0
Performance District
CA-11
Senators
Dianne Feinstein
Alejandro Padilla

Budget Funding

Federal Account Budget Subfunction Object Class Total Percentage
National Institute of Allergy and Infectious Diseases, National Institutes of Health, Health and Human Services (075-0885) Health research and training Grants, subsidies, and contributions (41.0) $1,049,975 100%
Modified: 9/5/25