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Multiple Myeloma, Version 5.2026, NCCN Clinical Practice Guidelines In Oncology
Kumar, Shaji K., Adekola, Kehinde , Anderson, Larry , Costello, C. L., D’Angelo, Christopher R. , Elsedawy, Noura, Godara, Amandeep , Godby, Kelly, Hillengass, J, Holmberg, Leona, Htut, Myo , Huff, Carol Ann , Hultcrantz, Malin , Kang, Yubin , Larson, Sarah, Lee, Hans Chulhee, Liedtke, Michaela , Martin, Thomas, Omel, James, Robinson, Timothy J., Rosenberg, Aaron, Sherbenou, Daniel, Suvannasankha, Attaya, Valent, Jason , Varshavsky‐Yanovsky, Asya, Ye, J Christine, Kovach, Emily, Kumar, Rashmi , Kumar, Shaji , Callander, Natalie S. , Baljević, Muhamed , Baz, Rachid , Campagnaro, Erica , Costello, Caitlin , Derman, Benjamin A. , Devarakonda, Srinivas , Hillengass, Jens, Holmberg, Leona , Kang, Yubin , Larson, Sarah, Lee, Hans C. , Rosenberg, Aaron , Sarosiek, Shayna , Schroeder, Mark A. , Sherbenou, Daniel W , Suvannasankha, Attaya , Valent, Jason Neil , Vogl, Dan T. , Kovách, E

Journal of the National Comprehensive Cancer Network | January 8, 2026 | Volume: 24 | Issue: 1 | Pages: No page available

10.6004/jnccn.2026.0001 | PMID 41671464 Get It

The treatment landscape for multiple myeloma (MM) is evolving rapidly and includes several new options. The management must be tailored to the individual. The NCCN Guidelines for MM provide a framework to base decisions regarding diagnosis, workup, treatment, and follow-up of both newly diagnosed and previously treated relapsed/refractory MM. This manuscript outlines the recommendations from NCCN Guidelines for MM specific to newly diagnosed MM (NDMM).
Spectrum, prevalence, and clinical correlates of PPM1D mutations in patients with clonal hematopoiesis and clonal cytopenias
Badar, Talha , Marando, Ludovica , Latorre-Crespo, Eric, Oliva, Francyess Denis, Lin, Chenyu , McCormick, Benjamin J. , Kettani, Mobachir El , Shah, Kashish, Kusne, Yael , Jamy, Omer , Diebold, Kendall , Coltoff, Alexander , Finke, Christy M. , Foran, James M. , Kharfan‐Dabaja, Mohamed A. , Fan, Yao‐Shan, Jiang, Liuyan , He, Rong , Thomas, M. , Patel, Anand , Viswanatha, D., Shah, Maleeha, Mangaonkar, Abhishek A. , Kirschner, Kristina , Al‐Kali, Aref , Gangat, Naseema, Litzow, Mark R. , Patnaik, Mrinal M. , Latorre‐Crespo, Eric , Latorre, Eric , Lin, Chenyu , El Kettani, Mobachir , Kusne, Yael N , Jamy, Omer , Kharfan-Dabaja, Mohamed A , He, Rong , Patel, Anand , Viswanatha, David, Shah, Mithun V , Saliba, Antoine N , Kirschner, Kristina , Al-Kali, Aref , Gangat, Naseema , Litzow, Mark R. , Patnaik, Mrinal , Badar, Talha , Lasho, Terra L. , Thomas, Miles, Saliba, Antoine N. , Gangat, Naseema

Blood Advances | January 7, 2026 | Volume: 10 | Issue: 5 | Pages: 1746-1755

10.1182/bloodadvances.2025018031 | PMID 41499760 Get It

Abstract TP53 and PPM1D are key regulators of DNA damage response and repair, and somatic mutations in these genes often co-occur in hematopoietic cells, expanding under genotoxic stress. Unlike TP53 mutations, where mechanisms of progression are defined, pathways underlying clonal fitness and transformation in PPM1D mutant cells remain unclear. In collaboration with 5 academic institutions, we analyzed the clinical and molecular landscape of 337 patients with clonal hematopoiesis (CH) and clonal cytopenia of undetermined significance (CCUS) across 4 genotypes: PPM1Dmt/TP53wt (n = 170 [50%]), PPM1Dmt/TP53mt (n = 25 [7%]), TP53mt/PPM1Dwt (n = 17 [5%]), and TP53wt/PPM1Dwt (n = 125 [38%]). All PPM1D variants were truncating, located in exon 6 of the gene, with a median variant allele frequency (VAF) of 6% (range, 0.3%-64%). The PPM1Dmt/TP53mt genotype was most frequently encountered in therapy-related CH/CCUS (t-CH/t-CCUS; 80%, 66.5%, 76.5%, and 19%; P ≤ .001) and had a shorter time interval to detection from last genotoxic exposure (6.2, 5.9, 11.25, and 24.5 months; P ≤ .001) compared with PPM1Dmt/TP53wt, TP53mt/PPM1Dwt, and TP53wt/PPM1Dwt genotypes, respectively. Acknowledging the short follow-up duration, rates of malignant transformation were lower in the PPM1Dmt/TP53wt (2%) and PPM1Dmt/TP53mt (4%) groups compared with PPM1Dwt/TP53wt (12%) and PPM1Dwt/TP53mt (17%) groups (P ≤ .001), respectively. In summary, PPM1D mutations are frequently observed in t-CH/t-CCUS, with low median VAFs, and are associated with low rates of progression, even when comutated with TP53.
Treatment of Multiple Myeloma: ASCO–Ontario Health (Cancer Care Ontario) Living Guideline
Hicks, Lisa K., Messersmith, Hans , Hadidi, Samer S.A. Al, Banerjee, Rahul, Kumar, Shaji , Wildes, Tanya M. , Bal, Susan, Bhella, Sita , Chmielewski, Cynthia, Costello, C. L., Dabney, Raetasha, Hartley-Brown, Monique, Langerak, Alan, Martin, Thomas, Mian, Hira, Riva, Eloisa, Seth, Rahul, Subramanian, Latha, Hicks, Lisa K. , Banerjee, Rahul , Mian, Hira , Hicks, Lisa K. , Messersmith, Hans , Al Hadidi, Samer , Banerjee, Rahul , Derman, Benjamin A , Kumar, Shaji K , Wildes, Tanya , Bal, Susan , Hartley-Brown, Monique , Lipe, Brea , McCurdy, Arleigh , Mian, Hira , Riva, Eloisa , Derman, Benjamin A. , Bal, Susan , Chmielewski, Cynthia, Costello, Caitlin , Martin, Thomas, McCurdy, Arleigh , Mıkhael, Joseph

Journal of Clinical Oncology | January 6, 2026 | Volume: 44 | Issue: 10 | Pages: 914-941

10.1200/jco-25-02587 | PMID 41494138 Get It

This guideline has been updated. This ASCO Living Guideline is reviewed on an eight-week cycle. Please see the online dynamic version for the latest updates. ASCO Guidelines provide recommendations with comprehensive review and analyses of the relevant literature for each recommendation, following the guideline development process as outlined in the ASCO Guidelines Methodology Manual . ASCO Guidelines follow the ASCO Conflict of Interest Policy for Clinical Practice Guidelines . Clinical Practice Guidelines and other guidance (“Guidance”) provided by ASCO is not a comprehensive or definitive guide to treatment options. It is intended for voluntary use by clinicians and should be used in conjunction with independent professional judgment. Guidance may not be applicable to all patients, interventions, diseases or stages of diseases. Guidance is based on review and analysis of relevant literature, and is not intended as a statement of the standard of care. ASCO does not endorse third-party drugs, devices, services, or therapies and assumes no responsibility for any harm arising from or related to the use of this information. See complete disclaimer in Appendix 1 and Appendix 2 (online only) for more . PURPOSE To provide updated guidance regarding the therapy for multiple myeloma. METHODS ASCO and Ontario Health (Cancer Care Ontario) convened a joint Expert Panel and conducted an updated systematic review of the literature. RESULTS The updated review identified a total of 161 relevant randomized trials. UPDATED RECOMMENDATIONS Daratumumab therapy may be offered to patients with high-risk smoldering myeloma. Quadruplet therapy with daratumumab or isatuximab, combined with bortezomib, lenalidomide, and dexamethasone, should be offered as initial therapy for transplant eligible patients. They should also be offered at least lenalidomide maintenance, with or without daratumumab, carfilzomib, and/or dexamethasone. Quadruplet therapy with daratumumab or isatuximab, combined with bortezomib, lenalidomide, and dexamethasone, should be offered as therapy for suitable transplant-ineligible patients. Patients with relapsed or refractory multiple myeloma should be offered triplet therapy or T-cell redirecting therapies according to a set of recommended principles. Additional information is available at www.asco.org/hematologic-malignancies-guidelines .
Rationale and design of a randomized, sham-controlled, clinical trial for evaluation of the Edwards APTURE transcatheter shunt system (ALT-FLOW II)
Kereiakes, Dean J, Tedford, Ryan J, Lindenfeld, JoAnn, Gray, William A. , Zahr, Firas, Lurz, Phillip, Hibbert, B., Baron, Suzanne J., Jorde, Ulrich P, Teerlink, John R, Kahwash, Rami , Lilly, S. Mary, Böhm, M, Windecker, S, Butler, Javed, Harrington, Robert A, Tedford, Ryan J. , Hibbert, Benjamin , Jorde, Ulrich P. , Kereiakes, Dean J , Tedford, Ryan J , Zahr, Firas , Hibbert, Benjamin , Teerlink, John R , Kahwash, Rami , Böhm, Michael , Windecker, Stephan , Butler, Javed , Kereiakes, Dean J. , Lindenfeld, JoAnn , Zahr, Firas , Cavalcante, João L. , Lilly, Scott M, Windecker, Stephan , Butler, Javed , Harrington, Robert A.

European Journal of Heart Failure | January 6, 2026 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.1093/ejhf/xuaf016 | PMID 41771068 Get It

Abstract Aims Heart failure (HF) with preserved (HFpEF) and mildly reduced (HFmrEF) ejection fraction are prevalent, yet frequently underdiagnosed syndromes associated with high morbidity and mortality, impaired quality of life, and escalating healthcare expenditures. Although guideline-directed medications like SGLT2 inhibitors have been shown to reduce the risk of hospitalization and cardiovascular death, their use remains limited and substantial residual risk persists. This trial aims to evaluate the safety and performance of a novel left-atrium-to-coronary-sinus shunt (Edwards APTURE transcatheter shunt system) in HFpEF and HFmrEF patients. Methods ALT-FLOW II is a prospective multi-centre, randomized, sham-controlled, double-blinded (patient and assessor) trial. Approximately 100 symptomatic HF patients aged ≥18 years with left ventricular ejection fraction >40% and exercise pulmonary capillary wedge pressure (PCWP) ≥25 mm Hg with a PCWP to right atrial pressure gradient ≥8 mm Hg will be randomized 1:1 to the APTURE shunt vs sham control. Key exclusion criteria include severe HF, significant valvular disease, and more than mild right ventricular dysfunction. The primary endpoints are the safety of the APTURE device at 30 days and change in workload-corrected PCWP normalized to bodyweight at 6 months. Secondary endpoints include changes in patient-reported outcomes, and hemodynamic and echocardiographic parameters through 5 years. The trial will also explore the impact of the device on short-term cardiac remodelling and intra-cardiac flow patterns using multi-modality imaging. Conclusions The ALT-FLOW II trial will evaluate the safety and performance of the APTURE system in symptomatic HFpEF and HFmrEF patients with elevated left atrial pressure.
Mucus plugs in chronic obstructive pulmonary disease are heterogeneous in size and shape and occur in relatively large airways
Farooqui, Omar, Elicker, Brett M. , Henry, Travis, Hahn, Lewis D. , Kallianos, Kimberly , Han, MeiLan K, Barr, R Graham, Smith, Benjamin M, Comellas, Alejandro P, Bon, Jessica , Hansel, Nadia, Wells, J Michael, Paine, R, Barjaktarevic, I., Schroeder, Joyce , Woodruff, Prescott G, Huang, B J, FAHY, JOHN V., Wells, J. Michael , Comellas, Alejandro P. , Smith, Benjamin M. , Schroeder, Joyce D , Comellas, Alejandro P , Wells, J Michael , Henry, Travis S, Han, MeiLan King , Barr, R. Graham, Smith, Benjamin M., Hansel, Nadia, Barjaktarević, Igor , Woodruff, Prescott G.

American Journal of Respiratory and Critical Care Medicine | January 5, 2026 | Volume: 212 | Issue: 2 | Pages: 268-276

10.1093/ajrccm/aamaf138 | PMID 41738094 Get It

Abstract Rationale Mucus plugs occur in chronic obstructive pulmonary disease (COPD), but little is known about their size and airway location or whether these mucus plug features change as emphysema worsens. Methods Computed tomographic lung scans from 31 participants with COPD from the SubPopulations and InteRmediate Outcomes In COPD Study (SPIROMICS) cohort were analyzed to quantify mucus plug size and airway location and extent of emphysema. Radiologist annotations of mucus plugs were incorporated in an image processing pipeline to generate size and location information. Emphysema was quantified as the percentage of voxels less than -950 Hounsfield units. Measurements and Main Results The length distribution of 563 annotated mucus plugs varied from 2 to 50 mm. The distribution was multimodal, and an 11-mm length defined short (“stubby,” ≤11 mm) and long (“stringy,” >11 mm) plug phenotypes, with stubby plugs being most common (64%). Mucus plugs localized predominantly to airway generations 6 to 9, and their prevalence was highest in lower lobes. On a lobar basis, the mucus plug number decreased as emphysema percentage increased, whereas average mucus plug volume tended to increase. Conclusion COPD is characterized by mucus plugs of varying size and shape, and emphysematous lung regions may be differentially susceptible to formation of these plugs. The location of mucus plugs in segmental and subsegmental airways in COPD makes them amenable to treatment with inhaled medications or bronchoscopy.
Genomic mechanisms of resistance to venetoclax in multiple myeloma with t(11;14)( CCND1 ; IGH )
Wiedmeier-Nutor, Julia Erin, Jelinek, Tomas, Shivaram, Suganti, Tang, Hongwei , Owens, Rebecca W, Tereza, Ševčíková, Fonseca, Rodrigo , Zhao, Logan, Zhu, Yuan Xiao, Matulis, Shannon M. , Mitsiades, C., Hajek, R, Chesi, M., Bergsagel, P. Leif, Esteban, Braggio, Kumar, Shaji , Wiedmeier, Julia E. , Wiedmeier-Nutor, J Erin, Fonseca, Rodrigo , Durante, Michael , Diamond, Benjamin T , Zhu, Yuan X , Landgren, C Ola , Chesi, Marta , Bergsagel, P. Leif , Braggio, Esteban , Boise, Lawrence H , Fonseca, Rafael , Kumar, Shaji K , Maura, Francesco , Wiedmeier-Nutor, Julia E , Kaddoura, Marcella , Gupta, Vikas A. , Ziccheddu, Bachisio , Shivaram, Suganti, Sevcikova, Tereza, Durante, Michael , Diamond, Benjamin , Shi, Chang-Xin , Mitsiades, Constantine S. , Landgren, Ola , Usmani, Saad Z. , Hájek, Roman , Chesi, Marta , Bergsagel, P. Leif , Braggio, Esteban , Boise, Lawrence , Fonseca, Rafaël , Maura, Francesco , Baughn, Linda B.

Blood | January 2, 2026 | Volume: 147 | Issue: 14 | Pages: 1598-1610

10.1182/blood.2025029996 | PMID 41481388 Get It

Abstract Multiple myeloma (MM) with t(11;14)(CCND1;IGH) remains the only subset sensitive to the BCL2 inhibitor venetoclax. However, not all patients with t(11;14)(CCND1;IGH) respond to treatment, and some progress early after initial response. To investigate this, we examined 44 whole-genome and whole-exome sequencing data samples from 34 patients with t(11;14) MM treated with venetoclax. The presence of mutations in the RAS pathway was strongly associated with shortened progression-free survival (PFS) and was validated in an independent cohort of 21 patients with MM. The presence of 1q gain was also associated with shorter PFS in patients without RAS mutations. In 10 patients with paired prevenetoclax and postvenetoclax treatment samples, postvenetoclax progression was recurrently driven by the selection of genomic events in the BCL2/MCL1 and RAS pathways and of high-risk features (eg, loss of TP53 and CDKN2C). Overall, our study shows that comprehensive genomic profiling can identify most mechanisms underlying resistance to BCL2 inhibition in t(11;14)(CCND1;IGH) MM.
Tracking seizure cycles beats a prospective moving average: Commentary on "Rigorous evaluation of five e‐diary alone seizure forecasting tools"
Stirling, Rachel E. , Brinkmann, Benjamin H. , Freestone, Dean R. , Karoly, Philippa J, Karoly, Phillipa J , Brinkmann, Benjamin H , Freestone, Dean R , Stirling, Rachel E , Karoly, Philippa J.

Epilepsia | December 31, 2025 | Volume: 67 | Issue: 4 | Pages: 1582-1586

10.1002/epi.70084 | PMID 41474376 Get It

Abstract There is debate on the predictive value of multiday seizure cycles versus simple statistical baselines. Multidien seizure cyclicity is a prevalent, patient‐specific phenomenon with promise for epilepsy management. We challenge the assertion that cycle tracking is no better than a moving average, which is an inherently retrospective model that lags changes in seizure likelihood. This commentary compared a causal cyclic forecast to a prospectively applied moving average across a large seizure diary cohort ( n = 768) and two gold‐standard chronic EEG cohorts ( n = 24). For the EEG and diary cohorts, cycle tracking demonstrated significantly superior accuracy to the moving average for both hourly and daily forecasts ( p < 0.0001), using multiple performance metrics. These results confirm that event‐based cyclical models offer more accurate, simulated real‐world forecasts. Robust forecasting tools must prioritize the detection and modeling of seizure cycles to move beyond simple baseline performance and provide actionable clinical utility.
A Randomized, Double-Blind, Controlled, Parallel Group Study with Amustaline/Glutathione Pathogen Reduced Red Blood Cells in Regions at Potential Risk for Zika Virus Transfusion-Transmitted Infections (RedeS Study): -- Protocol for a Phase 3, Randomized, C
Ayala, Edgardo F. Cartagena, Colon, Lumen Vera, Aydinok, Y., Arboleda-Osorio, Bolivar , Bracey, Arthur , Fasano, Ross M. , Yee, Marianne, Zubair, Abba, Nizzi, Frank, Shah, Sanjay, Snyder, Edward L. , Treml, Angela , Zheng, Yan, Takemoto, Clifford M., Green, Jeffrey A., Jackson, Bryon , Gniadek, Thomas J. , Bentow, Stanley, Mufti, Nina, Aydınok, Yeşim , Fasano, Ross M. , Sarode, Ravi , Pitman, John P. , Liu, Kathy , Corash, Laurence M , Benjamin, Richard J

No container title available | December 31, 2025 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.21203/rs.3.rs-7801515/v1 Get It

Abstract Background Red blood cell (RBC) transfusion may be lifesaving, however transfusion-transmitted infections (TTI) and transfusion-associated graft-versus-host disease (TA-GVHD) still pose a threat despite current donor selection and testing requirements. Amustaline (S-303)/glutathione (GSH) pathogen reduction (PR) is designed to inactivate infectious microbes and leukocytes in RBCs. The RedeS study evaluates the safety and efficacy of amustaline/GSH PR-RBCs compared to conventional RBCs in a broad spectrum of patients requiring acute and/or repeated RBC transfusion support. Methods RedeS is a Phase 3, prospective, multi-center, randomized, double-blind, active-controlled, parallel-design study, with a 6-month extension option to evaluate patients requiring repeated transfusions including red cell exchange (RCE).Eligible subjects will be stratified according to site, baseline bleeding status and participation in the extension period. The study arms include a transfusion period of 28-days for anemia with any bleeding or non-bleeding patients or a 28-day+6-month extension for non-bleeding patients with chronic anemia requiring repeated simple transfusions, or for patients with sickle cell disease (SCD) expected to receive three RCE procedures. The study will seek to enroll 600-800 subjects in the overall safety analysis, including ~140 repeatedly-transfused subjects in the 6-month extension including up to 30 subjects receiving three RCE procedures. The primary safety endpoints are the proportion of patients with any treatment-emergent adverse events (TEAEs) related to study RBC transfusion through 28 days after the last study transfusion, and the proportion of patients with treatment-emergent antibodies with confirmed specificity to PR-RBCs. The primary efficacy endpoint is the hemoglobin (Hb) increment in subjects who are non-bleeding at baseline, adjusted for the grams of Hb transfused and averaged over multiple transfusions. With 352 evaluable transfused non-bleeding subjects (176 per treatment group) from either arm, the study will have 80% power to demonstrate non-inferiority, defined as a Hb increment treatment difference of no more than 15% of the Control group mean, assuming a Control arm coefficient of variation of 50%. Discussion RedeS will characterize the safety of amustaline/GSH PR-RBCs and is designed to demonstrate the non-inferiority of PR-RBCs to conventional RBCs with respect to Hb increment, a common pragmatic clinical assessment of RBC transfusion effectiveness.
Achieving Alignment and Implant-Specific Goals in Anterior Lumbar Interbody Fusion, and Predictors of Postoperative Intradiscal Lordosis: The Role of Spinopelvic Parameters, Cage Lordosis, Intraoperative Consistency, Surgical Technique, and Treated Level
Hamouda, Abdelrahman, Pennington, Zach, Kumar, Rahul , Martini, Michael L. , Obiri-Yeboah, Derrick , Potes, Maria Astudillo, Kendall, Nicholas , Hafz, Omar , Clarke, Michelle J. , Krauss, William E. , Freedman, Brett A., Helgeson, Melvin D. , Sebastian, Arjun S. , Mikula, Anthony L., Fogelson, Jeremy L. , Elder, Benjamin D. , Pennington, Zach , Hamouda, Abdelrahman M. , Hamouda, Abdelrahman , Martini, Michael , Astudillo Potes, Maria , Helgeson, Melvin D , Sebastian, Arjun S , Mikula, Anthony L , Fogelson, Jeremy L , Elder, Benjamin D , Pennington, Zach , Clarke, Michelle J , Kumar, Rahul , Potes, Maria Astudillo , Hafz, Omar , Nassr, Ahmad , Freedman, Brett Arthur , Mikula, Anthony L.

Operative Neurosurgery | December 29, 2025 | Volume: 31 | Issue: 3 | Pages: 431-444

10.1227/ons.0000000000001868 | PMID 41460067 Get It

BACKGROUND AND OBJECTIVES: Anterior lumbar interbody fusion (ALIF) is a powerful procedure for sagittal correction and indirect decompression in the lumbar spine, though aggressive correction can cause stretch neuropraxia and implant subsidence. The aim of this study was to identify radiographic and clinical predictors of segmental correction, as well as to evaluate the degree to which segmental correction on supine intraoperative radiographs translates to postoperative upright alignment changes. METHODS: We identified patients treated with 1- or 2-level ALIF at a tertiary care center and extracted data on demographics, spinopelvic parameters, and surgical details. Patients treated with isolated ALIF and ALIF with supplementary posterior instrumentation were compared on pre- and postoperative intradiscal lordosis (IDL) and change in IDL. Multivariable linear regression was performed to identify independent predictors of postoperative IDL. RESULTS: We included 204 patients (median age 57 years, 55.4% male) treated at 258 levels, of whom 114 (55.9%) underwent supplementary posterior fixation and 150 (73.5%) underwent single-level implantation. Across all patients, postoperative IDL was significantly greater than preoperative segmental lordosis (25.4° vs 15.3°; P < .001). Standalone ALIF achieved less ΔIDL than circumferential fusion for L5/S1 procedures (7.4° vs 11.6°; P < .001), though ΔIDL for L3/4 and L4/5 was similar between the standalone and circumferential groups. Multivariable analysis showed postoperative IDL to be predicted by greater preoperative IDL (β = 0.26° per degree; [0.15, 0.36]; P < .001), L5/S1 [vs L4/5] implantation (β = 3.97°; [2.72, 5.21]; P < .001), use of supplementary posterior fixation (β = 1.80°; [0.70, 2.89]; P < .001), and greater implant lordosis (β = 0.62° per degree; [0.44, 0.79]; P < .001). CONCLUSION: Postoperative IDL after 1- or 2-level ALIF is best predicted by placement of larger interbody sizes, L5/S1 implantation, greater baseline IDL, and use of adjunct posterior fixation. Patients with higher preoperative lordosis experienced smaller postoperative increases in IDL, though this was likely influenced by a treatment bias.
Plasma Alzheimer's mass spectrometry biomarkers associated with cerebrospinal fluid dynamics
Bermudez, Camilo , Hofrenning, Ekaterina I. , Gunter, Jeffrey L. , Cogswell, Petrice M, Jones, David T., Lowe, Val J. , Elder, Benjamin D, Petersen, Ronald, Knopman, David S., Graff‐Radford, Neill R., Graff‐Radford, Jonathan, Cogswell, Petrice M. , Jones, David T. , Schwarz, Christopher G. , Elder, Benjamin D. , Petersen, Ronald, Vemuri, Prashanthi , Algeciras‐Schimnich, Alicia , Mielke, Michelle M. , Knopman, David S. , Graff‐Radford, Neill R. , Jack, Clifford R. , Graff‐Radford, Jonathan

Alzheimer's & Dementia | December 24, 2025 | Volume: 21 | Issue: S2 | Pages: No page available

10.1002/alz70856_101248 Get It

Abstract Background Individuals with coexisting Alzheimer's disease (AD) and disorders of CSF dynamics such as normal‐pressure hydrocephalus (NPH) have lower CSF Aβ42 levels, which can confound interpretation of AD CSF‐biomarkers. However, little is known about how CSF dynamics influences plasma AD biomarkers. The objective of this study was to determine whether mass spectrometry‐based blood tests for AD are associated with disproportionately enlarged subarachnoid space hydrocephalus (DESH) on MRI. Method 509 Individuals from the Mayo Clinic Study of Aging, with MRI, 11C‐Pittsburgh compound B (Aβ) PET scans, and plasma phosphorylated‐tau protein 217, Aβ40 and Aβ42 were included. We performed an age‐adjusted logistic regression to determine whether abnormal values of p ‐Tau 217 (Abnormal if >1.55 pg/mL), %p‐tau217 defined as the ratio of phosphorylated Tau217 to non‐phosphorylated tau x 100% (Abnormal if >1.55%), Aβ42 (Abnormal if <41.5 pg/mL), and Aβ42/40 ratio (Abnormal if <0.094) were associated with the presence of DESH, as classified by a previously validated automated algorithm. Result Thirty‐two participants were classified as DESH‐positive. The median [IQR] age was 76.8 yrs [70.6, 82.9] for participants with DESH and 72.4 [59.3, 85.5] without DESH (Table 1). An abnormal plasma Aβ42 was associated with DESH (OR, 2.56 [1.19, 5.74], p = 0.018), but having an abnormal Aβ42/40 ratio (OR 2.01 [0.94, 4.56], p = 0.079) was not. There was no association between being DESH‐positive and an abnormal plasma p ‐tau217 (OR 1.30 [0.51, 3.09], p = 0.560) or with abnormal %plasma p ‐tau217 (OR 1.82 [0.74, 4.20], p = 0.17) (Figure 1). Subgroup analysis showed that only those participants who had an abnormal Aβ42 and positive amyloid PET (≥25 Centiloids) showed an association with DESH compared to biomarker‐ and PET‐negative participants (OR 3.10 [1.15, 8.43], p = 0.024 ) . Conclusion Understanding how CSF dynamics affect plasma biomarkers is critical for implementation. The relationship between lower Aβ42 and DESH is expected based on prior CSF studies, which can be addressed by using an amyloid ratio. p ‐tau217 shows robustness against DESH, making it a suitable biomarker in cases of abnormal cerebrospinal fluid dynamics although validation in a more severe CSF dynamics group is warranted.