Research Roundup: Broad-spectrum antibiotic partnership, New broad-spectrum influenza vaccine, New novel mRNA malaria vaccine

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign up now to receive our weekly R&D News Roundup email. Scientists have discovered that a naturally occurring strain of bacteria could help reduce the transmission of malaria by stopping the development of parasites in a mosquito’s gut. The bacteria, TC1, was found by chance when GSK scientists noticed that one of their mosquito colonies had stopped becoming infected with malaria parasites and later identified TC1 as the cause. Researchers have since observed that the bacteria works by secreting a small molecule, called harmane, which inhibits the parasite’s growth and that can be ingested by mosquitoes if mixed with sugar or absorbed by contact, opening the possibility for it to be used as an abatement tool. A recent study found that the bacteria can reduce a mosquito’s parasitic load by up to 73 percent, and trials in Burkina Faso are ongoing to assess the intervention’s effectiveness and safety in real-world settings.An international team of researchers has identified a genetic variant among some people of African ancestry that is associated with them having naturally lower viral loads of HIV—thereby slowing their illness progression and lowering the risk of them transmitting the virus. According to the researchers, this is the first new genetic variant related to HIV infection discovered within the last nearly 30 years. Between 4 to 13 percent of people of African origin are thought to carry this variant, which was discovered through an analysis of the DNA of almost 4,000 people of African ancestry infected with HIV-1. The scientists now intend to continue studies to more fully understand how exactly this variant impacts HIV replication.Health experts are warning that dengue poses a danger to pregnant women, as new research has found that the disease can cause serious health complications for both mothers and their unborn babies. A recent study from the University of Surrey found that mild infection can make a pregnant individual 77 percent more likely to give birth before 32 weeks and can more than double the risk of the child being born with extremely low birth weight, which can affect brain development. This work builds on prior research that found pregnant women are three to four times more likely to die after becoming infected and 450 times more likely if their infection progresses into dengue hemorrhagic fever. There are currently no specific treatments for dengue, and existing vaccines are not recommended for pregnant women.

Congressional negotiations are moving fast and furious as policymakers seek to reach an agreement to reauthorize must-pass legislation, known as the Pandemic and All-Hazards Preparedness Act (PAHPA), governing how the United States prepares for health threats. The latest 2019 reauthorization of the original 2006 law will expire on September 30, leaving legislators with a rapidly closing window to determine how national preparedness infrastructure should be reformed in the wake of the COVID-19 pandemic.Though this legislation has far-reaching implications for America’s entire preparedness architecture, most notably for global health research advocates, it authorizes the work of the Biomedical Advanced Research and Development Authority (BARDA), an agency charged with advancing the research and development (R&D) of medical countermeasures (MCMs) against health threats. BARDA was created via PAHPA in response to the 2001 anthrax attacks in the United States and in recognition of the need for the government to play a role in spurring R&D of tools for chemical, biological, radiological, and nuclear threats for which there is no commercial market. While historically, the agency has focused foremost on man-made bioterror threats, in the past decade, it has increasingly played a role in advancing vaccines, drugs, diagnostics, and other tools against naturally occurring global threats like Ebola, Zika, antimicrobial resistance (AMR), and COVID-19—for the latter, as one of the leaders of the US government’s Operation Warp Speed.While the COVID-19 pandemic underscored the unique value of BARDA’s R&D capabilities, it also brought the United States to a point of intense partisanship on issues of pandemic preparation and public health. These splits have plunged PAHPA—which has historically enjoyed an uncontroversial and bipartisan policymaking process—into a tense 2023 reauthorization cycle.Below we look at where negotiations stand in each chamber and where things could go from here.A bipartisan SenateOn the Senate side, the deliberations for a mostly clean reauthorization have gone relatively smoothly in the Health, Education, Labor, and Pensions (HELP) Committee. While an initial discussion draft released on July 3 reflected areas of disagreement between Chairman Bernie Sanders (I-VT)—who wanted to see the bill tackle drug pricing and supply chain challenges—and Ranking Member Bill Cassidy (R-LA) —who proposed changes to the priority review voucher (PRV) for MCMs—by the July 20 markup, the senators had worked out a bipartisan deal in the form of a managers amendment.The bill, which last week was approved to be reported out of committee, includes a comprise that would require drugmakers to alert the government of disruptions in the supply of drugs and pharmaceutical ingredients and a new government-directed study on policy solutions to delink drug prices from R&D costs in exchange for a straight five-year extension of the MCM PRV program. Importantly for global health research advocates, the bill also includes more expansive and explicit language directing BARDA to conduct R&D for known and as-yet-unknown pathogens with pandemic potential, as well as an amendment introduced by Sen. Hickenlooper (D-CO) to authorize the creation of a new US Food and Drug Administration (FDA) team tasked with reviewing MCMs for emerging pathogens—as was requested by FDA in their fiscal year 2024 priority letter. It is worth noting that the compromise forged between Sens. Sanders and Cassidy included new authorities for FDA that have been the cause of derision across the chamber on the House side.A partisan HouseIn the House, leading up to the Energy and Commerce (E&C) Committee’s July 19 markups, tensions remained heightened as Democrats and Republicans were still unable to reach bipartisan consensus on the two PAHPA bills introduced by Representative Richard Hudson (R-NC): H.R. 4421, the Preparing for All Hazards and Pathogens Reauthorization Act, which covers BARDA and its parent agency the Administration for Strategic Preparedness and Response (ASPR), and H.R. 4420, the Preparedness and Response Reauthorization Act, which proposes changes to the US Centers for Disease Control and Prevention (CDC). Rep. Hudson reportedly decided to split the House version of PAHPA into two bills to disentangle the more politicized portions of the bill, housed in H.R. 4420, from the ones with more consensus, housed in H.R. 4421.Both bills were approved last week to go to the floor of the House.Since the House’s preliminary June hearing on PAHPA at which Rep. Anna Eshoo (D-CA) announced that she had pulled her name from the legislation, Rep. Hudson’s PAHPA bills have advanced through the chamber on a purely partisan basis. Other vocal representatives, like E&C Committee Ranking Member Frank Pallone, Jr. (D-NJ), hammered Republicans for not including FDA authorities to address drug shortages in the scope of PAHPA. Unsatisfied with the Republicans’ response to their demands, House Democrats on the committee released their own version of PAHPA immediately before the July 19 markups. The Democrats’ draft bill includes provisions to strengthen CDC, increase funding for programs like the Strategic National Stockpile (SNS), and give FDA new authorities to mitigate drug shortages.This tension culminated in almost exclusively party-line votes approving 15 health policy-related bills that, among other provisions, would hamper CDC’s powers and, according to experts, underfund CDC, BARDA, SNS, and ASPR. In one small glimmer of good news, the Republican-led H.R. 4421 PAHPA bill, like its Senate counterpart, also included more expansive language directing BARDA’s research on emerging infectious diseases (EIDs).What now?For the first time, the House E&C Committee has sent PAHPA to the House floor on a partisan basis in striking contrast to the Senate HELP Committee’s mostly bipartisan process. Notably, House E&C Committee Chair Cathy McMorris Rodgers (R-WA) alluded to considering the Senate’s “more tailored approach to more FDA authorities” as a workable compromise, but only time will tell as the bills advance to the next stage in the process. If the current House and Senate versions of the bill receive the requisite votes to pass in each chamber, they will then be sent to the Conference Committee, where the differences must be reconciled, and the resulting bill will be sent back to the House and Senate floors for final votes.But with the partisan nature of the PAHPA bills in the House, the slim majority Republicans hold, and the difficult procedural hurdles in the Senate that have been used to hold up anything COVID-related, it could prove challenging for policymakers to reconcile around a bill capable of being passed in both chambers. The only sure thing is that this reauthorization process is unpredictable and at the whim of the current political climate.What is GHTC’s take?Earlier this year, GHTC put out a set of policy recommendations for the House and Senate to consider as they reauthorized PAHPA. Even though the process is not over, there are indications that some of our coalition’s priorities are represented in the draft bills from both the House and the Senate. As discussed, both bills contain explicit language highlighting the need for “advanced development and manufacturing of MCMs for viral families which have significant potential to cause a pandemic” and call out “emerging infectious diseases.” It is welcome news to see the bills specifically highlight the need for R&D for both known and as-yet-known, or Disease X, infectious disease threats.Additionally, the Hickenlooper amendment is also supported by GHTC since it would bolster FDA “activities to advance scientific research related to the development of tools, standards, and approaches to assess the safety, efficacy, quality, and performance of countermeasures.” The inclusion of both EID callouts and FDA’s fiscal year 2024 priorities are notable wins in a year marked by proposed funding cuts to global health programs.Of course, there are still areas of much-needed attention not fully addressed by the bills. The lack of boldness of either chambers’ bills can be attributed to the difficult fiscal environment Congress finds itself in—exemplified by the far more contentious appropriations bills that many believe are sending the United States on the path to a potential government shutdown. GHTC’s recommendations for Congress to create a dedicated EID funding line and authorize more money for AMR research at BARDA are not included in the bills—nor is there discussion on advancing the low-resource settings utility of BARDA products, inclusion of the Pioneering Antimicrobial Subscriptions To End Up surging Resistance (PASTEUR) Act to incentivize AMR research, or provisions to give BARDA loan authorities.However, through our staff-level conversations on the Hill, the dial seems to be turning in a positive direction for these priorities. Especially in discussions on EID funding and AMR priorities (including PASTEUR), there is growing bipartisan agreement that these issues are important enough for standalone funding—just not in this specific PAHPA during this particularly difficult fiscal year. Whether or not PAHPA is the vehicle, we see tremendous strides in the Hill’s recognition of the issues central to GHTC and our future advocacy.