The ARLG has published a new supplement in Clinical Infectious Diseases (CID) that features ARLG’s scientific accomplishments and future directions (Volume 77, Supplement 4, 15 October, 2023). As part of the Infectious Disease Society of America’s (IDSA) family of journals, the focus of CID is presenting novel research, reviews, and perspectives about all aspects of infectious disease with an emphasis on clinical practice-changing studies. CID Supplement 4 entitled “The Antibacterial Resistance Leadership Group (ARLG): Innovation and Evolution” includes eight individual articles authored by a host of ARLG members on topics ranging from the operational structure and goals of each ARLG Center, the progress made in gram-positive and gram-negative bacterial infection research, diagnostics, innovations, and mentoring.
Antibacterial Resistance, Research, and Funding in 2024
In “Antibacterial Resistance, Research, and Funding in 2024,” Amanda Jezek and Carlos del Rio outline the origins of ARLG, created in 2013 and funded by the National Institute of Allergy and Infectious Diseases (NIAID). Many advances in modern medicine, like cancer chemotherapy, organ transplantation, complex surgeries, and biologics, are compromised by antibacterial resistance (AR). The current pipeline of antibacterial therapeutics is less than 50 deep, with a smaller number targeting priority gram-negative bacteria.1 Jezek and del Rio discuss the critical stakeholders in the fight against AR and the development of novel antibiotics.
The Antibacterial Resistance Leadership Group: Scientific Advancements and Future Directions
“The Antibacterial Resistance Leadership Group: Scientific Advancements and Future Directions” summarizes ARLG’s perspective on important contributions by the ARLG and key areas for future innovation. The ARLG agenda highlights the need to focus on 3 fields of research — gram-positive infections, gram-negative infections, and diagnostics. The ARLG developed a new approach to clinical trial design called DOOR (desirability of outcome ranking) that uses “an ordinal measure of global outcome to assess both benefits and harms.”2 ARLG has collaborated with the Food and Drug Administration (FDA) in applying DOOR to the analysis of AR interventional trials.
This article summarizes some of ARLG’s pivotal studies, illustrating the expanse and depth of work conducted so far. ARLG emphasizes the importance of collaborations with international industry partners, governmental agencies, and academic institutions, as well as the need to mentor and build the next generation of AR investigators.
Under the Hood: The Scientific Leadership, Clinical Operations, Statistical and Data Management, and Laboratory Centers of the Antibacterial Resistance Leadership Group
The ARLG’s scientific agenda is supported by 4 core centers — the Scientific Leadership Center, Clinical Operations Center, Statistical and Data Management Center, and Laboratory Center. “Under the Hood: The Scientific Leadership, Clinical Operations, Statistical and Data Management, and Laboratory Centers of the Antibacterial Resistance Leadership Group” identifies the functions and activities of each center and how they facilitate the goals of ARLG. “The mission of the Antibacterial Resistance Leadership Group (ARLG) is to prioritize, design, and execute clinical research that will affect the prevention, diagnosis, and treatment of infections caused by antibiotic-resistant bacteria.”3
The role of the Scientific Leadership Center (SLC) is to create, develop, and prioritize the ARLG scientific agenda, which is dynamically changing as findings emerge. The SLC has reviewed more than 50 study proposals during the 2nd grant cycle (ARLG 2.0) of which 24 have been approved and implemented. These 24 studies add to the 44 approved during the initial grant cycle (ARLG 1.0).
The Clinical Operations Center (COC), hosted at Duke Clinical Research Institute (DCRI), is responsible for management aspects of the ARLG, including early trial development and study design, as well as identification and retention of experienced clinical trial sites. The Statistical and Data Management Center (SDMC) contributes expert biostatistical and data management support to the ARLG to further its mission of 1) ensuring studies are designed, conducted, analyzed, and reported with optimal scientific integrity, 2) enhancing scientific value and efficiency through “development and implementation of innovative practical research methods and tools”3, and 3) mentoring the scientific community on research fundamentals.
The ARLG Laboratory Center (LC) offers expertise on laboratory and diagnostic aspects of AR research, promoting partnerships with diagnostic companies and providing pathways for novel testing. It also maintains a specimen and bacterial isolate biorepository that provides access to members of the research and diagnostic community. With ARLG 2.0, the collective Centers of the ARLG will concentrate its efforts on pivotal interventional and strategy trials.
Priorities and Progress in Gram-positive Bacterial Infection Research by the Antibacterial Resistance Leadership Group: A Narrative Review
A central area of interest for ARLG is infections caused by gram-positive bacteria. In “Priorities and Progress in Gram-positive Bacterial Infection Research by the Antibacterial Resistance Leadership Group: A Narrative Review,” three priorities for ARLG related to gram-positive bacteria are outlined — 1) investigating strategies or therapies, 2) comparing the effectiveness of novel single agents or combinations of agents for infections caused by methicillin-resistant Staphylococcus aureus (MRSA) or vancomycin-resistant enterococci, and 3) optimizing administration of antibacterial agents. This article describes ARLG accomplishments thus far and the ways it plans to build upon that foundation to perform further innovative studies.
Priorities and Progress in Gram-negative Bacterial Infection Research by the Antibacterial Resistance Leadership Group
Another fundamental area of research for ARLG is the treatment and prevention of antibacterial-resistant gram-negative bacterial infections, specifically Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii. These four bacteria represent 4 of the top 6 pathogens responsible for global deaths related to AR.4
“Priorities and Progress in Gram-negative Bacterial Infection Research by the Antibacterial Resistance Leadership Group” provides ARLG’s top four gram-negative bacteria research priorities — 1) define global epidemiology of multidrug-resistant (MDR) gram-negative bacterial infections to “optimize the design and execution of interventional trials,”5 2) look at novel strategies to prevent MDR gram-negative infections in patients who are immunocompromised, 3) identify strategies to optimize delivery of antibiotics for gram-negative infections, and 4) find and evaluate novel antibacterial agents or treatment strategies for MDR gram-negative bacterial infections.
The ARLG has conducted a series of observational, natural history, pharmacokinetic, and clinical studies to inform and investigate these four priorities, in order to improve patient outcomes. This article summarizes studies conducted thus far, progress made, and ARLG’s plans for future directions.
Priorities and Progress in Diagnostic Research by the Antibacterial Resistance Leadership Group
“Priorities and Progress in Diagnostic Research by the Antibacterial Resistance Leadership Group” by Hanson et al. addresses the importance of advancing diagnostic techniques, in particular the need for rapid tests capable of detecting pathogens directly from clinical specimens. This article summarizes the current portfolio of ARLG’s new or recently completed diagnostic studies addressing needs related to bacteremia, respiratory tract infections, and sexually transmitted diseases. It also describes novel approaches to diagnostics initiated by the ARLG, including adaptable design platforms to evaluate “multiple tests in parallel, assessments of the patient-level impact of rapid organism identification with antibacterial resistance (AR) detection, and evaluation of novel pathogen- and host-based diagnostics for which a perfect gold standard for comparison does not exist.”6 ARLG is focused on the development of innovative diagnostic tests or testing strategies that have the potential to combat AR and are affordable and practical in clinical settings.
The Future Ain’t What It Used to Be…Out With the Old…In With the Better: Antibacterial Resistance Leadership Group Innovations
Innovations in treatments for AR infections are not limited to drugs alone. “The Future Ain’t What It Used to Be…Out With the Old…In With the Better: Antibacterial Resistance Leadership Group Innovations” highlights advances from the ARLG in areas ranging from accurate diagnosis to the use of bacteriophages to treat bacterial infections. Using “phages,” viruses that infect and replicate in bacteria cells, to treat bacterial infections dates back many years. Phage therapy has not been applied for several decades in the West though due to underlying skepticism and the prevalence of antibiotic drugs.7 ARLG is conducting one of the first randomized, placebo-controlled, double-blind studies of intravenous phage therapy called PHAGE that is for patients with cystic fibrosis and Pseudomonas aeruginosa airway colonization.8 Another ARLG study, “Sequential, Multiple-Assignment, Randomized Trials for Comparing Personalized Antibiotic Strategies (SMART COMPASS)” compares multiple therapy options in a pragmatic design that mirrors clinical practice.9
The ARLG Innovations Working Group (WG), a NIH and FDA collaboration with patient representatives, is working to develop publicly available tools to support AR researchers. One goal of the Innovations WG has been to create a set of standardized and validated DOOR outcomes for use in registrational trials for four common ID indications: complicated urinary tract infection (cUTI), complicated intra-abdominal infection (cIAI), hospital- acquired/ventilator-associated bacterial pneumonia (HABP/ VABP), and acute bacterial skin and skin structure infection (ABSSSI). In addition to the Innovations WG, ARLG’s health-related quality of life (HRQoL) task force focuses on assessing the HRQoL of patients with infections, establishing whether measures are “fit-for-purpose” in bacterial infections and incorporating HRQoL into registrational trials. These groups are just some examples of the innovative approaches the ARLG is implementing to address the challenges posed by AR research.
The Next Generation: Mentoring and Diversity in the Antibacterial Resistance Leadership Group
Lastly, “The Next Generation: Mentoring and Diversity in the Antibacterial Resistance Leadership Group” describes the resources ARLG is devoting to preparing the next generation of AR researchers, including providing mentorship by established investigators, supporting mentor-mentee research projects, and developing skills of new researchers in core competencies. Awards in the ARLG Mentorship program include the Dr. John G Bartlett ARLG Fellowship Award, the Early-Stage Investigator (ESI) Award, the Early Faculty Seedling Award, and the Early-Stage Investigator Program Promoting Diversity in Antibacterial Resistance Research (EVERYONE) award.
The ARLG Diversity, Equity, and Inclusion (DEI) Working Group helps with access, monitoring, and evaluation of ARLG’s success in its DEI efforts, ensures sharing of educational opportunities, develops and maintains an inclusive environment, and promotes investigator career advancement within infectious disease and AR. ARLG actively supports the goal of growing diversity amongst clinical investigators.
The Mentoring Program has included 11 Bartlett ARLG fellows, granted 10 ESI awards, and supported 8 trialists in training over the course of both ARLG 1.0 and 2.0. Thus far, in ARLG 2.0, the Program has given one Early Faculty Seedling award and plans to fund at least two EVERYONE awards. The Mentoring Committee includes 16 members from a variety of backgrounds and uses an award process modeled after NIH review sections. Across the Program, mentees learn about research methodology, study design principles, and analyses.
Concluding Thoughts
“The Antibacterial Resistance Leadership Group (ARLG): Innovation and Evolution” supplement in Clinical Infectious Diseases comprehensively reviews accomplishments by the ARLG, clearly communicates it structure, goals, and priorities, and gives us a glimpse of upcoming directions. The mission of ARLG is to “prioritize, design, and execute clinical research that will affect the prevention, diagnosis, and treatment of infections caused by antibiotic-resistant bacteria.”3 To carry out this mission, ARLG invests resources in the innovative research conducted by its clinical, scientific, and statistical experts and devotes funding and experience to supporting a robust Mentoring Program. In the future, the Scientific Leadership Center plans to focus on even larger, pivotal interventional and strategy trials. Moving onward and forward, the ARLG hopes to leverage new technologies, create innovative strategies, and foster solutions in the important fight against AR.
References
- WHO. 2021 antibacterial agents in clinical and preclinical development: an overview and analysis. World Health Organization. Accessed 30 June 2023, https://www.who.int/publications/i/item/9789240047655
- Chambers HF, Cross HR, Souli M, et al. The Antibacterial Resistance Leadership Group: Scientific Advancements and Future Directions. Clinical Infectious Diseases. 2023;77(Supplement_4):S279-S287. doi:10.1093/cid/ciad475
- Cross HR, Greenwood-Quaintance KE, Souli M, et al. Under the Hood: The Scientific Leadership, Clinical Operations, Statistical and Data Management, and Laboratory Centers of the Antibacterial Resistance Leadership Group. Clinical Infectious Diseases. 2023;77(Supplement_4):S288-S294. doi:10.1093/cid/ciad529
- Global burden of bacterial antimicrobial resistance in 2019: a systematic analysis. Lancet. Feb 12 2022;399(10325):629-655. doi:10.1016/s0140-6736(21)02724-0
- Satlin MJ, van Duin D, Tamma PD, et al. Priorities and Progress in Gram-negative Bacterial Infection Research by the Antibacterial Resistance Leadership Group. Clinical Infectious Diseases. 2023;77(Supplement_4):S305-S313. doi:10.1093/cid/ciad547
- Hanson KE, Banerjee R, Doernberg SB, et al. Priorities and Progress in Diagnostic Research by the Antibacterial Resistance Leadership Group. Clinical Infectious Diseases. 2023;77(Supplement_4):S314-S320. doi:10.1093/cid/ciad541
- Barron M. Phase Therapy: Past, Present and Future. American Society for Microbiology. Accessed 06 November 2023, https://asm.org/Articles/2022/August/Phage-Therapy-Past,-Present-and-Future
- Tamma PD, Souli M, Billard M, et al. Safety and microbiological activity of phage therapy in persons with cystic fibrosis colonized with Pseudomonas aeruginosa: study protocol for a phase 1b/2, multicenter, randomized, double-blind, placebo-controlled trial. Trials. Dec 28 2022;23(1):1057. doi:10.1186/s13063-022-07047-5
- Evans SR, Follmann D, Liu Y, et al. Sequential, Multiple-Assignment, Randomized Trials for COMparing Personalized Antibiotic StrategieS (SMART-COMPASS). Clin Infect Dis. May 17 2019;68(11):1961-1967. doi:10.1093/cid/ciy912