Daily ReportOct 17, 2026
Sepsis, October 17 edition
We read 37 papers and selected 3.
Summary
Today's most impactful sepsis-related studies span mechanistic discovery, national practice benchmarking, and post-sepsis recovery care. A mechanistic study identified a FOXA1–LCN2–TRIM9 regulatory axis linked to ferroptosis and lung injury, while a nationwide Chinese survey quantified substantial heterogeneity in acute kidney injury monitoring across intensive care units. An expert-panel study also provided implementable priorities for supporting recovery after sepsis.
Research Themes
- Mechanisms of sepsis-induced organ injury
- Standardization of critical care monitoring
- Post-sepsis recovery and survivorship care
Selected Articles
1. FOXA1-driven transcription and TRIM9-mediated ubiquitination of LCN2 modulate ferroptosis in experimental sepsis-induced acute lung injury.
Integrative transcriptomic analysis identified LCN2 as a ferroptosis-related gene increased in sepsis. In LPS-treated human pulmonary microvascular endothelial cells, LCN2 silencing reduced inflammatory responses, apoptosis, ferroptosis, and proliferation inhibition. Mechanistically, FOXA1 activated LCN2 transcription, whereas TRIM9 promoted K48-linked polyubiquitination and degradation of LCN2; LCN2 knockdown also reduced lung injury in cecal ligation and puncture rats.
Impact: This study proposes a previously unintegrated FOXA1–LCN2–TRIM9 regulatory axis connecting transcriptional control, protein turnover, ferroptosis, and sepsis-induced lung injury. It provides a mechanistically testable framework for developing targeted therapies, although translation beyond experimental models remains necessary.
Clinical Implications: LCN2, FOXA1, and TRIM9 may serve as candidate biomarkers or therapeutic targets for sepsis-associated acute lung injury. No immediate change in clinical practice is justified because efficacy, toxicity, and target specificity have not been established in humans.
Key Findings
- LCN2 was upregulated in sepsis patients and in LPS-treated human pulmonary microvascular endothelial cells.
- LCN2 silencing attenuated inflammatory responses, apoptosis, and ferroptosis-related changes in vitro and reduced lung injury in cecal ligation and puncture rats.
- FOXA1 activated LCN2 transcription, while TRIM9 promoted K48-linked polyubiquitination and degradation of LCN2.
Methodological Strengths
- The study integrated public transcriptomics with molecular experiments in human endothelial cells and an in vivo polymicrobial sepsis model.
- It investigated both transcriptional activation and post-translational degradation, providing convergent mechanistic evidence.
Limitations
- The evidence is primarily preclinical and does not establish efficacy or safety in human patients.
- The abstract does not report comprehensive dose-response, pharmacokinetic, or cell-type-specific validation of targeting the FOXA1–LCN2–TRIM9 axis.
Future Directions: Future studies should validate the axis in independent human sepsis cohorts, determine whether circulating or tissue LCN2 reflects disease severity, and test selective pharmacologic modulation in clinically relevant polymicrobial models. Combination strategies that address ferroptosis and inflammation should also be evaluated.
BACKGROUND: Sepsis-induced acute lung injury (ALI) remains a devastating complication of sepsis, marked by uncontrolled pulmonary inflammation, alveolar-capillary barrier disruption, and high mortality. Ferroptosis, an iron-dependent form of regulated cell death driven by lipid peroxidation, is implicated in sepsis-related organ dysfunction. Moreover, a ferroptosis-related gene, Lipocalin 2 (LCN2), has been reported as a potential biomarker for sepsis-induced organ damage. However, the role and mechanism of LCN2 in sepsis-triggered ALI are still unclear. METHODS: Transcriptomic data from GSE32707 were integrated for differential expression and WGCNA analysis. One overlapping gene was identified using key modules from WGCNA and ferroptosis-related genes from GeneCards database. LCN2 mRNA level was determined using real-time quantitative polymerase chain reaction (RT-qPCR).
2. National variation in acute kidney injury diagnosis and monitoring across adult intensive care units in china: a nationwide cross-sectional survey.
This nationwide survey included 1,896 adult intensive care units across all 31 provincial-level administrative regions of mainland China. Although 97.9% reported diagnosing acute kidney injury, only 63.2% explicitly implemented staging and 75.9% used both urine output and serum creatinine. Hourly urine-output monitoring increased during sepsis and acute kidney injury, but dynamic monitoring was used by only 14.8% of units, with staffing and workload identified as major barriers.
Impact: The study provides an unusually broad system-level benchmark for acute kidney injury recognition and monitoring in critical care. Its findings identify actionable implementation gaps, particularly in staging, dynamic urine-output monitoring, and staffing, which are directly relevant to sepsis-associated acute kidney injury care.
Clinical Implications: ICUs should consider standardized acute kidney injury staging, combined urine-output and serum-creatinine assessment, risk-responsive escalation during sepsis, and closed-loop response pathways. Implementation must account for nursing workload, staffing, and local resources.
Key Findings
- Among 1,896 participating adult ICUs, 97.9% reported diagnosing acute kidney injury, but only 63.2% explicitly implemented staging.
- Use of both urine output and serum creatinine for diagnosis was reported by 75.9% of ICUs.
- Hourly urine-output monitoring increased to 74.1% in sepsis and 77.7% in sepsis-associated acute kidney injury, whereas dynamic monitoring was implemented by only 14.8% of ICUs.
Methodological Strengths
- The survey achieved broad geographic coverage across all 31 provincial-level administrative regions of mainland China and included 1,896 unique ICU units.
- Multivariable analyses, false-discovery-rate correction, and an exploratory monitoring implementation score strengthened the descriptive assessment.
Limitations
- The cross-sectional, self-reported design cannot establish whether reported monitoring practices were actually performed or whether they improved patient outcomes.
- Participation was voluntary and may be affected by selection or response bias, limiting generalizability beyond participating ICUs.
Future Directions: Prospective implementation studies should test standardized acute kidney injury pathways, electronic alerts, nurse-support models, and workload-adjusted monitoring protocols. Future research should link monitoring intensity to time-to-recognition, treatment delivery, renal recovery, and mortality in sepsis-associated acute kidney injury.
BACKGROUND: Acute kidney injury (AKI) is common in critically ill patients and strongly associated with adverse outcomes, yet national ICU-level evidence on AKI diagnosis and monitoring in China remains limited. METHODS: We conducted a nationwide anonymous cross-sectional web survey of adult ICUs in China from June 25 to September 26, 2025. The survey assessed AKI diagnosis and staging, UO and SCr monitoring across clinical scenarios, biomarker use, early warning systems, and changes in UO monitoring after AKI. We used multivariable logistic regression to identify factors associated with UO-monitoring practices, with FDR correction for multiple comparisons.
3. Best Practices for Optimizing Recovery from Sepsis; Results of an Expert Panel.
Using the RAND/UCLA appropriateness method, a multidisciplinary panel evaluated 18 practices intended to support recovery after sepsis. Ten practices were rated valid, including arranging follow-up before discharge, screening basic and instrumental activities of daily living and durable medical equipment needs, educating patients about sepsis and post-sepsis symptoms, and reviewing discharge medications. Five of these were judged highly important with moderate resource requirements.
Impact: This study translates multidisciplinary expert consensus into a prioritized, feasible framework for post-sepsis care, an area with substantial morbidity but limited trial evidence. It is particularly valuable for quality improvement and care-transition design, while appropriately distinguishing valid from uncertain practices.
Clinical Implications: Health systems should prioritize arranging follow-up before discharge, assessing functional limitations and equipment needs, educating patients and caregivers about sepsis and post-sepsis symptoms, and reviewing discharge medications. These practices can be incorporated into discharge bundles and transitional-care pathways, but their effects on readmission, function, and mortality require prospective evaluation.
Key Findings
- All 18 proposed care practices achieved agreement in final grading; 10 were rated valid and eight had uncertain validity.
- Five valid practices were rated highly important and moderately resource-intensive: pre-discharge follow-up scheduling, functional and equipment-needs screening, education about sepsis, education about post-sepsis symptoms, and medication counseling.
- The panel included 15 multidisciplinary experts and Veteran patient representatives, but lacked social work representation and was predominantly composed of Veterans Health Administration clinicians.
Methodological Strengths
- The RAND/UCLA appropriateness method is a structured and validated approach for prioritizing practices when direct outcome evidence is limited.
- The panel incorporated expertise from sepsis, critical care, hospital medicine, primary care, geriatrics, nursing, quality improvement, and patient representatives.
Limitations
- Expert ratings do not establish that the recommended practices improve patient-centered outcomes, readmission, functional recovery, or mortality.
- Panel composition may limit generalizability because social work was not represented and most clinicians were affiliated with the Veterans Health Administration.
Future Directions: Prospective pragmatic trials and implementation studies should test post-sepsis care bundles that include the five high-priority practices. Research should measure patient-reported outcomes, functional status, medication safety, caregiver burden, health-care utilization, equity, and cost-effectiveness across diverse health systems.
BACKGROUND: Over one million patients survive sepsis annually in the USA. After sepsis, patients often experience new morbidity, with high rates of readmission and post-acute mortality. However, there are limited data to inform best practices to support recovery from sepsis. METHODS: We convened an expert panel to rate the validity, importance, and resource intensity of 18 care practices aimed to support recovery from sepsis using the RAND/UCLA appropriateness method (a modified Delphi approach). The multidisciplinary panel consisted of 15 experts in sepsis, critical care, hospital medicine, primary care, geriatrics, nursing, and quality improvement, as well as Veteran patient representatives. RESULTS: Among the 18 care practices considered, all received agreement in final grading, 10 (56%) were rated as valid, and eight (44%) were rated as uncertain validity.