BACKGROUND: Traumatic brain injury (TBI) is a major contributor to trauma-related deaths and disability worldwide. Management of TBI is currently limited to supportive care. We have previously shown that global knockout...BACKGROUND: Traumatic brain injury (TBI) is a major contributor to trauma-related deaths and disability worldwide. Management of TBI is currently limited to supportive care. We have previously shown that global knockout of PAD2 confers neuroprotection, but its therapeutic potential was unclear. This study was designed to test the hypothesis that selective inhibition of PAD2 following TBI would improve neurological outcomes. METHODS: Male mice (c57bl6/j, 11-14 wk) were subjected to controlled cortical impact-induced TBI, and 5 to 10 minutes later, randomly given either PAD2 inhibitor ("loading dose" 60 mg/kg AFM41a dissolved in dimethyl sulfoxide (DMSO) or vehicle (DMSO), (n=6/group). One day post-TBI, frozen brain sections were Nissl-stained to determine lesion size. In a separate experiment, the long-term impact of AFM41a treatment on motor, sensory, and cognitive recovery after TBI was evaluated. In addition to the loading dose, animals received a "maintenance dose" of 30 mg/kg of AFM41a or vehicle on postinjury days (PIDs) 2 to 5. Neurologic Severity Scores (NSS on PIDs 1-8) and visuospatial learning via Morris water maze test (MWM on PIDs 21-30) were assessed. RESULTS: Mice treated with AFM41a had significantly smaller lesion sizes compared with the control group (p<0.05). Treatment with AFM41a also increased the rate of sensory and motor recovery, as evidenced by reduced NSS on PIDs 1 to 5 (p<0.05), and improved visuospatial learning and memory as shown by MWM (p<0.05). CONCLUSIONS: PAD 2 is a promising therapeutic target in TBI, and its inhibition with AFM41a, a first-in-class PAD2-selective inhibitor, confers early neuroprotection as well as sustained cognitive benefits.
Castillo JA, Uppuluri J, Le M
… +13 more, Tran T, Pivetti C, Huang KW, Vatoofy S, Ratcliff A, Dangan A, Bannerman S, Lee M, Shahin M, Loll E, Clark K, Wang A, Russo R
J Trauma Acute Care Surg
· 2026 Jun · PMID 42378652
·
Publisher ↗
Biffl SE, Biffl WL, Ignacio RC
… +12 more, Castelo MR, Burch A, Gorra A, Schoonover B, Cohen P, Rivera N, Hightower T, Wattsman TA, Wilkes W, Fox N, Goldsmith A, Askegard J
J Trauma Acute Care Surg
· 2026 Jun · PMID 42371732
·
Publisher ↗
J Trauma Acute Care Surg
· 2026 Jun · PMID 42371409
·
Publisher ↗
The foundational principles in trauma care align with the operational strategies of Special Forces. Here we present a novel perspective on trauma care drawn from the book "Spec Ops-Case Studies in Special Operations Warf...The foundational principles in trauma care align with the operational strategies of Special Forces. Here we present a novel perspective on trauma care drawn from the book "Spec Ops-Case Studies in Special Operations Warfare: Theory and Practice" (1995) by Admiral (Ret'd) William H. McRaven. The book introduces the concept of Relative Superiority (RS), defined as a point in time when a smaller, well-trained, and well-prepared force gains a decisive advantage over a larger adversary. Achieving and maintaining RS requires precise timing and coordinated action. As time progresses, the opportunity to gain or retain this advantage diminishes. In trauma care, RS can be compared with the critical window for achieving hemorrhage control, timely resuscitation, and rapid transition to damage control surgery. Delays in these interventions decrease survival probability. If hemorrhage control is achieved but not sustained, re-establishing it becomes increasingly difficult and often fatal. This framework is illustrated through two trauma case studies. In Case Study I, timely interventions result in sustained control and survival. In Case Study II, delays led to only temporary control, which is subsequently lost, contributing to patient death. Within the RS framework, rapid surgical access can shift the advantage by attenuating hemorrhage and mitigating shock; however, speed alone does not guarantee survival. Achieving and maintaining RS requires sustained hemostasis, access to resources, and delivery of high-quality care. Applying the RS framework to trauma care offers a structured approach to evaluating the timing and effectiveness of interventions during critical phases of care. Its integration into Morbidity and Mortality discussions may help identify missed opportunities, guide performance improvement, and inform system-level changes. This conceptual model may support trauma teams in understanding how small gains at key moments influence overall outcomes in high-acuity clinical scenarios.
J Trauma Acute Care Surg
· 2026 Jun · PMID 42360887
·
Publisher ↗
Future large-scale combat operations (LSCOs) against a near-peer adversary are projected to generate casualty volumes far exceeding those experienced during the Global War on Terror. Estimates range from 800 to 3,600 US...Future large-scale combat operations (LSCOs) against a near-peer adversary are projected to generate casualty volumes far exceeding those experienced during the Global War on Terror. Estimates range from 800 to 3,600 US casualties per day, potentially overwhelming a military medical system optimized for counterinsurgency warfare with rapid evacuation and limited daily losses. Hemorrhage remains the leading cause of preventable battlefield death, and blood is the cornerstone of combat casualty care. Although the military blood system advanced significantly during the Iraq and Afghanistan conflicts, it was not designed for sustained, high-volume attrition warfare. The Global War on Terror data provides critical insight. Of ∼53,000 wounded service members over two decades, roughly 20% received blood transfusions, leaving nearly 42,500 wounded who did not require transfusions. Extrapolated to a projected 72,000-casualty LSCO scenario, ∼57,500 individuals would constitute a "walking wounded" population-hemodynamically stable casualties who could represent a substantial, immediately available donor pool. We propose institutionalizing a structured "Walking Wounded Blood Bank," in which eligible, stable casualties donate blood before evacuation. In addition, integrating blood donation into routine redeployment processing could further augment supply during protracted conflict. In contrast, harvesting blood from the deceased is biologically unsound, ethically problematic, and mathematically negligible as a scalable solution. Preparation for LSCO requires confronting the arithmetic of mass casualties. Leveraging the walking wounded and redeploying forces as structured donor populations offers a pragmatic, ethical, and operationally feasible strategy to expand transfusion capacity before demand exceeds supply.
Hübner CT, Kalbas Y, Klingebiel FK
… +8 more, Ricklin J, Hinkelmann MA, Stoeck CT, Sawauchi K, Weisskopf M, Cinelli P, Pape HC, Pfeifer R
J Trauma Acute Care Surg
· 2026 Jun · PMID 42330360
·
Publisher ↗
BACKGROUND: After severe hemorrhage and polytrauma, late complications such as multi-organ failure (MOF) remain major contributors to morbidity and mortality. Especially after hemorrhagic shock the kidney is known to be...BACKGROUND: After severe hemorrhage and polytrauma, late complications such as multi-organ failure (MOF) remain major contributors to morbidity and mortality. Especially after hemorrhagic shock the kidney is known to be at high risk. As laboratory parameters, like creatinine, provide only delayed and indirect information about kidney function, our study evaluated whether iodine-based spectral computed tomography (SDCT) can quantify renal perfusion in a large-animal polytrauma model. METHODS: Thirty-two Landrace pigs (70±5 kg) were used, randomized into four groups (n=8). Tissue trauma group (TTFx) received a blunt chest injury and bilateral femur shaft fractures. In the shock (HS) group, hemorrhagic shock was induced by controlled blood withdrawal. The polytrauma (PT) group underwent tissue trauma and hemorrhagic shock. Eight uninjured pigs served as controls. Whole-body SDCT with iodine mapping was performed after trauma and after 24 hours. Serum creatinine was measured in parallel. Urine was sampled at baseline, after resuscitation, and after 24 hours. RESULTS: Significant differences in renal perfusion measured by iodine uptake were found during shock and after polytrauma: groups with hemorrhagic shock showed reduced renal perfusion compared with controls (P<0.001). Decreased iodine uptake correlated strongly with increased creatinine levels (ρ=-0.505, P=0.009). Hemorrhagic shock caused pronounced intrarenal functional impairment, reflected by elevated fractional sodium excretion (FENa 2.49% vs. 0.35%, P<0.001), reduced urine osmolality (P<0.001), and decreased urinary urea concentrations (P<0.001). Fractional calcium excretion (FECa), a novel parameter, was strongly increased in the shock group (6.18% vs. 0.19%, P<0.001). After 24-hour resuscitation, no significant differences between the groups were observed in either iodine uptake, creatinine levels, or urinary parameters. CONCLUSIONS: Spectral iodine imaging seems to reflect renal perfusion impairment after hemorrhagic shock. The observed correlations with creatinine and urinary parameters suggest that spectral CT may provide a rapid, imaging-based assessment of kidney dysfunction. The renal perfusion normalizes with resuscitation along with renal function parameters. (J Trauma Acute Care Surg. 2026;101: 121-128. c 2026 The Author (s). Published by Wolters Kluwer Health, Inc. on behalf of the American Association for the Surgery of Trauma.). LEVEL OF EVIDENCE: Not applicable.