sphingotec’s biomarker penKid® predicts septic acute kidney injury at time of admission to emergency department
- Sphingotec reports study data demonstrating that its proprietary renal function biomarker penKid® (Proenkephalin) predicts acute kidney injury (AKI), multi-organ failure and mortality in sepsis patients presenting to the emergency department (ED).
- High penKid® plasma levels identified all ED patients with hidden AKI and AKI at admission and reflected worsening of kidney function.
- penKid® point-of-care (POC) implementation in EDs could eliminate current limitations of AKI prediction in septic patients allowing physicians to adjust treatment and therapy monitoring of patients with suspected AKI.
- An automated CE-marked IVD penKid® assay running on sphingotec’s POC platform Nexus IB10 will be launched in Q1 2020.
Hennigsdorf/Berlin, Germany, December 20, 2019 - Diagnostics company SphingoTec GmbH ("sphingotec", Hennigsdorf Germany) today reported on the publication of novel study results of its proprietary kidney function biomarker penKid® in BMC Emergency Medicine1. The data from a prospective study enrolling 588 septic patients demonstrate that penKid® accurately predicted acute kidney injury (AKI), multiorgan failure (MOF) and mortality in unselected sepsis patients at presentation to the emergency department (ED). Furthermore, increasing penKid® blood levels indicated worsening kidney function.
While organ dysfunction is a hallmark of sepsis, the renal system is being particularly susceptible. One in two patients with septic shock develop AKI and are at increased risk of both severe morbidity and higher mortality. In the current study, the admission levels of penKid® and serum creatinine (SCr) were corelated with patient outcomes. SCr is the current diagnostic standard and is used to calculate the estimated glomerular filtration rate (eGFR), a surrogate parameter quantifying kidney function. In the study, elevated penKid® blood levels at admission predicted all septic patients who developed AKI. Furthermore, high penKid® levels independently from eGFR, identified patients with subclinical AKI at ED admission, who could not be identified by SCr values. penKid® also predicted multiorgan failure and 28-day mortality.
Previously published clinical data from patients with sepsis admitted to intensive care units (ICUs) have provided evidence, that elevated blood levels of penKid® at admission predict AKI, worsening kidney function, organ failure and mortality independently from inflammation and other co-morbidities2. The new results demonstrate that penKid® can also identify AKI patients in a routine ED setting, in which therapy decision making is currently delayed due to the fact that eGFR assessment requires serial measurements2 and creatinine metabolism is affected by inflammation, fluid overload and the use of nephrotoxic agents3-4. Based on the study results, penKid® is a reliable marker for the detection and monitoring of subclinical AKI.
“These study results demonstrate for the first time that penKid® provides physicians at the emergency department with urgently needed information, which is complementary to the current diagnostic toolbox and enables the detection of AKI, particularly in patients with hidden AKI risk,” said Dr. Andreas Bergmann, founder and CEO of sphingotec. “To support timely treatment decisions that are likely to improve outcomes in critical care patient, we will launch in Q1-2020 a fully automated CE-IVD-marked point-of-care penKid® assay on the established Nexus IB10 platform.”
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1. Rosenqvist, M. (2019): Proenkephalin A 119–159 (penKid) – a novel biomarker for acute kidney injury in sepsis: an observational study, BMC Emerg Med. doi: 10.1186/s12873-019-0283-9
2. Caironi P, et al. (2018): Circulating Proenkephalin, acute kidney injury, and its improvement in patients with severe Sepsis or shock. Clin Chem. doi: 10.1373/clinchem.2018.288068
3. Moledina DG, et al. (2018): Phenotyping of acute kidney injury: beyond serum Creatinine. Semin Nephrol. doi: 10.1016/j.semnephrol.2017.09.002.
4. Ronco C. (2016): Acute kidney injury: from clinical to molecular diagnosis. Critical Care. Doi: 10.1186/s13054-016-1373-7.
About sphingotec
SphingoTec GmbH ("sphingotec"; Hennigsdorf near Berlin, Germany) develops and markets innovative in vitro diagnostic (IVD) tests for novel and proprietary biomarkers for the diagnosis, prediction and monitoring of acute medical conditions, such as sepsis, acute heart failure, circulatory shock, and acute kidney injury in order to support patient management and provide guidance for treatment strategies. sphingotec's proprietary biomarker portfolio includes bioactive adrenomedullin (bio-ADM®), a unique biomarker for real-time assessment of endothelial function in conditions like sepsis or congestive heart failure, Proenkephalin (penKid®), a unique biomarker for real-time assessment of kidney function, and Dipeptidyl Peptidase 3 (DPP3), a unique biomarker for cardio-renal pathway disruptions leading to acute organ dysfunction. In addition, sphingotec develops a portfolio of novel biomarkers, which predict the risks of developing obesity, breast cancer and cardiovascular diseases. IVD tests for sphingotec’s proprietary biomarkers are made available as sphingotest® microtiterplate tests as well as point-of-care tests on the Nexus IB10 immunoassay platform by sphingotec’s subsidiary Nexus Dx Inc. (San Diego, CA, USA) alongside a broad menu of IB10 tests for established biomarkers for acute and critical care.
About penKid®
Proenkephalin (penKid®) is a unique and proprietary biomarker for real-time assessment of kidney function. penKid® is a functional kidney marker that works in plasma, is independent from comorbidities and inflammation and provides timely information about the changing kidney function in critically ill patients. sphingotest® penKid® is a surrogate marker for the gold standard of glomerular filtration rate (GFR) and indicates two days earlier than the standard-of-care the development of acute kidney injury (AKI) in critically ill patients. These features enable physicians to predict, diagnose and closely monitor worsening and improving kidney function on intensive care units or emergency departments.
About Nexus Dx Inc. and the IB10 Platform
Nexus Dx Inc., a wholly-owned subsidiary of sphingotec, headquartered in San Diego, CA, USA, is a global provider of a near patient testing system and advanced diagnostic solution. The company is improving patient care by providing the medical community with rapid and reliable information at the point of care (POC), delivering patient information when and where it is needed most. The company has invested over $160m to develop and market the IB10 analyzer system which, without the need for sample preparation, automatically separates plasma from whole blood with subsequent reliable and quantitative detection of biomarkers in the plasma by means of antibodies. With a hands-on-time of less than 3 minutes the easy-to-use system provides in only 20 minutes test results for biomarkers that are crucial in the management of critical care patients. The portfolio of IB10 assays includes tests for established critical care parameters such as Procalcitonin, Troponin I, CK-MB, Myoglobin, NT-proBNP, and D-Dimer as well as tests for sphingotec’s proprietary biomarkers such as DPP3, an assay for Dipeptidyl Peptidase 3, a unique and proprietary biomarker for cardio-renal pathway disruptions leading to acute organ dysfunction. The IB10 assay for bioactive Adrenomedullin (bio-ADM®), a unique and proprietary biomarker for endothelial function and the assay for Proenkephalin (penKid®), a unique and proprietary biomarker for real-time assessment of kidney function, will be launched later in 2020.
• New ELISA sphingotest® penKid® enables widespread measurement of the kidney function biomarker Proenkephalin 119-159 (penKid) using standard laboratory equipment. • Only available test to match SphingoTec’s reference chemiluminescence assay, developed with patented high-sensitivity technology to provide consistent results across platforms. Hennigsdorf/Berlin, Germany, April 28 2026 - SphingoTec GmbH announces the launch of the ELISA sphingotest® penKid®, a new assay designed to make testing of its proprietary biomarker broadly accessible to research laboratories and pharmaceutical partners. Providing ease-of-use and precision, the test facilitates large-scale investigations of human kidney function in both acute and broader clinical research contexts. Responding to growing research interest The launch follows increasing demand from the scientific community to study penKid - a biomarker reflecting the current state of kidney function in critical care environments. While SphingoTec’s high-sensitivity sphingotest® penKid® assay serves as the reference method for clinical research and third-party IVD assays, the assay technology requiring dedicated equipment was not easily adoptable in research laboratories. The new ELISA sphingotest® penKid® now allows researchers worldwide to benefit from SphingoTec’s patented detection technology using standard photometers, extending penKid testing capability to a wider range of laboratories. Proven performance and data continuity The ELISA sphingotest® penKid® has been developed to achieve excellent correlation with SphingoTec’s reference chemiluminescence assay, ensuring consistent, high-quality results across different assay platforms. Both methods share the same underlying technology capable of detecting penKid concentrations in the picomolar range. Thanks to this technology transfer, researchers can rely on the same analytical precision and reliability that supported the clinical studies establishing penKid as a valuable kidney function biomarker. The assay’s robust design and German manufacturing ensure durable consistency and reproducibility. With this research-use ELISA, SphingoTec responds to the increasing availability of non-validated assays and encourages researchers to not compromise assay quality and performance to ensure trustworthy results - since data from non-validated tests may reflect assay limitations rather than the true performance of the penKid biomarker. Complementary approaches for clinical use and scientific exploration SphingoTec pursues its commercial strategy for the biomarker penKid through strategic out-licensing partnerships such as Boditech Med, which has developed an IVDR-certified assay for routine clinical use and rapid diagnostics. The newly launched ELISA sphingotest® penKid® represents a complementary initiative, specifically designed to support high-throughput clinical and translational research. Through this dual approach, SphingoTec reaffirms its commitment to fostering scientific collaboration and promoting the broader exploration of penKid across diverse research settings. “Developing the ELISA sphingotest® penKid® reflects our long-term commitment to improving critical care diagnostics,” said Deborah Bergmann, Managing Director and CEO of SphingoTec GmbH. “Beyond its currently validated clinical applications, we see strong potential for penKid to support research and improve diagnostics in other fields where kidney function is relevant. By encouraging scientists worldwide to incorporate penKid into their studies and clinical programs, we aim to accelerate innovation and advance best-fit diagnostic solutions that ultimately improve patient care.” About SphingoTec SphingoTec GmbH ("SphingoTec"; Hennigsdorf near Berlin, Germany) is a biomarker company focusing on the out-licensing of innovative critical care solutions for diagnosing, predicting, and monitoring acute medical conditions. SphingoTec develops its biomarkers to the commercial stage and partners with IVD companies to make them available on different IVD platforms. SphingoTec's proprietary biomarker portfolio includes Proenkephalin A 119-159 (penKid), a biomarker for the assessment of kidney function in critical diseases, and bioactive Adrenomedullin 1-52 (bio-ADM), a biomarker for the assessment of endothelial function in conditions like sepsis. Discover more on www.sphingotec.com Media Contact: Email: press@sphingotec.com Phone +49-3302-20565-0 SphingoTec GmbH Neuendorfstr. 15A 16761 Hennigsdorf, Germany
• PenKid surpasses serum creatinine on Day 1 post-transplant in detecting delayed graft function (DGF), with an AUROC of 0.87 versus 0.56 for creatinine. • PenKid differentiates slow graft function (SGF) from DGF up to 8 days earlier than current methods, supporting more timely clinical decisions. • PenKid levels remain unaffected by kidney replacement therapy (KRT), allowing for more accurate assessment of kidney function. • Independent validation in transplant cohort from Australia confirms performance and broad applicability. Hennigsdorf/Berlin, Germany, July 1, 2025 - Diagnostic company SphingoTec GmbH (“SphingoTec”) announces a landmark study (1) published in Transplant International, led by Heidelberg University Hospital in Germany in collaboration with researchers from Sydney, Australia, which identifies Proenkephalin A 119-159 (penKid) as a reliable biomarker for early and precise assessment of graft function trajectories following kidney transplantation. The research demonstrates that PenKid not only identifies patients at risk for DGF significantly earlier than traditional markers but also distinguishes between slow and delayed graft function with remarkable accuracy, offering clinicians a valuable new tool for patient management. The study prospectively evaluated 159 consecutive kidney transplant recipients at Heidelberg University Hospital and validated findings in an independent cohort from Sydney. PenKid consistently outperformed serum creatinine (SCr) in predicting graft function trajectories, particularly in the critical early post-transplant period. Notably, PenKid’s ability to remain unaffected by KRT—a treatment for severe kidney dysfunction—further sets it apart from SCr, which can be influenced by non-renal factors and KRT itself, thereby enhancing the reliability of graft function assessment. Multivariate analysis confirmed PenKid as the strongest independent predictor of both short-term graft function and 30-day outcomes, underscoring its clinical utility for early risk stratification. The biomarker’s superior granularity allows for nuanced classification of DGF severity, supporting more informed decisions regarding the initiation of dialysis or biopsy and offering potential for individualized patient care. With these findings, penKid steps forward as a practical addition to the transplant clinician’s toolkit, promising to sharpen decision-making for optimal outcomes. Its adoption could help transplant teams act with greater confidence and precision, ultimately strengthening the standard of care in kidney transplantation. ## References 1. Benning L et al. (2025) Proenkephalin A 119-159 in Kidney Transplantation: A Novel Biomarker for Superior Tracking of Graft Function Trajectories. Transpl. Int. 38:14366. doi: 10.3389/ti.2025.14366 About SphingoTec SphingoTec GmbH ("SphingoTec"; Hennigsdorf near Berlin, Germany) is a biomarker company focusing on the out-licensing of innovative critical care solutions for diagnosing, predicting, and monitoring acute medical conditions. SphingoTec develops its biomarkers to the commercial stage and partners with IVD companies to make them available on different IVD platforms. SphingoTec's proprietary biomarker portfolio includes Proenkephalin A 119-159 (penKid), a biomarker for the assessment of kidney function in critical diseases, commercially available on diagnostic platforms AFIAS and Nexus IB10 and bioactive Adrenomedullin 1-52 (bio-ADM), a biomarker for the assessment of endothelial function in conditions like sepsis. Discover more on www.sphingotec.com Contact : Ruxandra Lenz Marketing and Communication SphingoTec GmbH Phone +49-3302-20565-0 Email: press@sphingotec.com