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399 citation(s) found for "O'Connor, C".

Perturbation-Based Training on Compliant Surfaces to Improve Balance in Children With Cerebral Palsy: A Feasibility Study
Phillips, Connor , Phan, Vu , Jo, Kwanghee, Save, Omik , Russell, Joshua, Zeien, Kayla B., Eikenberry, Megan , Kinney, Carolyn L. , Lee, Hyunglae , Kinney, Carolyn , Russell, Joshua B.

IEEE Transactions on Medical Robotics and Bionics | April 12, 2023 | Volume: 5 | Issue: 2 | Pages: 242-252

10.1109/tmrb.2023.3265711 Get It

A five arm natural history study of nasal vestibulitis
Cathcart-Rake, Elizabeth , Zahrieh, David , Smith, Deanne, Young, Susan E. , McCue, Shaylene , Thomé, Stephan D. , Register, Terra, Piens, Jill, Friday, Bret B., Loprinzi, Charles L. , Cathcart-Rake, Elizabeth J , Young, Susan, O'Connor, Amanda, Loprinzi, Charles , Young, Susan, O'Connor, Amanda, Lacouture, Mario E.

Cancer Medicine | April 5, 2023 | Volume: 12 | Issue: 8 | Pages: 9650-9654

10.1002/cam4.5887 | PMID 37017603 Get It

AbstractIntroductionNasal symptoms are frequently reported by patients undergoing chemotherapy.MethodsEligible patients planning to receive paclitaxel, docetaxel, nab‐paclitaxel, bevacizumab without a concomitant taxane, or “other” (non‐taxane, non‐bevacizumab) chemotherapy regimens were invited to participate in this prospective study. Patients reported nasal symptoms prior to each dose of chemotherapy.ResultsThe percentage of patients (95% CI) who reported nasal symptoms was the same for patients who received bevacizumab or nab‐paclitaxel, 82.6% (61.2%, 95.1%). There were no significant differences among the proportions of patients experiencing nasal symptoms within the paclitaxel, nab‐paclitaxel, and bevacizumab cohorts. Patients in the nab‐paclitaxel cohort were more likely to experience symptoms than those in the non‐taxane non‐bevacizumab cohort or docetaxel cohort (p = 0.001, p = 0.001). Patients in the bevacizumab cohort were more likely to experience nasal symptoms than those in the non‐taxane non‐bevacizumab cohort (p = 0.03).ConclusionNasal vestibulitis symptoms are common in patients receiving chemotherapy, especially those receiving paclitaxel, docetaxel, and bevacizumab. Further investigations into treatments of this symptom complex are warranted.
Unpublished clinical trials of common rheumatic diseases
Pedersen, Connor , Tai, Shannon , Valley, Erin, Henry, Kathryn , Duarte‐García, Alí , Singla, Shikha , Putman, Michael , Duarte-García, Alí

Rheumatology | March 27, 2023 | Volume: 62 | Issue: 12 | Pages: 3811-3818

10.1093/rheumatology/kead141 | PMID 36971599 Get It

Abstract Objectives Randomized controlled trials (RCTs) provide high-quality evidence for treatment efficacy, but many RCTs remain unpublished. The objective of this study was to describe the proportion of unpublished RCTs in five rheumatic diseases and to identify factors associated with publication. Methods Registered RCTs for five rheumatic diseases (SLE, vasculitis, spondyloarthritis, SS and PsA) with over 30 months since study completion were identified using ClinicalTrials.gov. Index publications were identified by NCT ID numbers and structured text searches of publication databases. The results of unpublished studies were identified in abstracts and press releases; reasons for non-publication were assessed by surveying corresponding authors. Results Out of 203 studies that met eligibility criteria, 17.2% remained unpublished, representing data from 4281 trial participants. Higher proportions of published trials were phase 3 RCTs (57.1% vs 28.6% unpublished, P < 0.05) or had a positive primary outcome measure (64.9% vs 25.7% unpublished, P < 0.001). In a multivariable Cox proportional hazards model, a positive outcome was independently associated with publication (hazard ratio 1.55; 95% CI: 1.09, 2.22). Corresponding authors of 10 unpublished trials cited ongoing preparation of the manuscript (50.0%), sponsor/funder issues (40.0%) and unimportant/negative result (20.0%) as reasons for lack of publication. Conclusions Nearly one in five RCTs in rheumatology remain unpublished 2 years after trial completion, and publication is associated with positive primary outcome measures. Efforts to encourage universal publication of rheumatology RCTs and reanalysis of previously unpublished trials should be undertaken.
Autograft Demonstrates Superior Outcomes for Revision Anterior Cruciate Ligament Reconstruction When Compared With Allograft: A Systematic Review
Belk, John W. , Smith, John-Rudolph H. , McCarty, Eric C. , Kraeutler, Matthew J. , Smith, John R. , McCarty, Eric C , Smith, John-Rudolph , Littlefield, Connor P. , McCulloch, Patrick C. , Frank, Rachel M

The American Journal of Sports Medicine | March 3, 2023 | Volume: 52 | Issue: 3 | Pages: 859-867

10.1177/03635465231152232 | PMID 36867049 Get It

Background: Multiple studies have compared outcomes among patients undergoing revision anterior cruciate ligament reconstruction (ACLR) with autograft versus allograft, but these data are inconsistently reported and long-term outcomes depending on graft type are yet to be determined. Purpose: To perform a systematic review of clinical outcomes after revision ACLR (rACLR) with autograft versus allograft. Study Design: Systematic review; Level of evidence, 4. Methods: A systematic review of the literature was performed by searching PubMed, the Cochrane Library, and Embase to identify studies that compared the outcomes of patients undergoing rACLR with autograft versus allograft. The search phrase used was autograft allograft revision anterior cruciate ligament reconstruction. Graft rerupture rates, return-to-sports rates, anteroposterior laxity, and patient-reported outcome scores (subjective International Knee Documentation Committee, Tegner, Lysholm, and Knee injury and Osteoarthritis Outcome Score) were evaluated. Results: Eleven studies met inclusion criteria, including 3011 patients undergoing rACLR with autograft (mean age, 28.9 years) and 1238 patients undergoing rACLR with allograft (mean age, 28.0 years). Mean follow-up was 57.3 months. The most common autograft and allograft types were bone–patellar tendon–bone grafts. Overall, 6.2% of patients undergoing rACLR experienced graft retear, including 4.7% in the autograft group and 10.2% in the allograft group ( P < .0001). Among studies that reported return-to-sports rates, 66.2% of patients with an autograft returned to sports as opposed to 45.3% of patients with an allograft ( P = .01). Two studies found significantly greater postoperative knee laxity in the allograft group as compared with the autograft group ( P < .05). Among all patient-reported outcomes, 1 study found 1 significant difference between groups: patients with an autograft had a significantly higher postoperative Lysholm score when compared with patients with an allograft. Conclusion: Patients undergoing revision ACLR with an autograft can be expected to experience lower rates of graft retear, higher rates of return to sports, and less postoperative anteroposterior knee laxity when compared with patients undergoing revision ACLR with an allograft.
Comorbid extra‐intestinal central sensitization conditions worsen irritable bowel syndrome in primary care patients
Wang, Xiao Jing , Ebbert, Jon O. , Loftus, Connor G., Rosedahl, Jordan K., Wang, Xiao Jing , Philpot, Lindsey M.

Neurogastroenterology & Motility | February 20, 2023 | Volume: 35 | Issue: 4 | Pages: No page available

10.1111/nmo.14546 | PMID 36807964 Get It

AbstractBackgroundIrritable bowel syndrome (IBS) is characterized as a central sensitization syndrome (CSS), a group of conditions including fibromyalgia, chronic fatigue, and restless leg syndrome (RLS) among others with frequent comorbidities of anxiety, depression, and chemical sensitivity. The prevalence of comorbid conditions and their impact on IBS symptom severity and quality of life in rural community populations has not been described.MethodsWe administered a cross‐sectional survey to patients with a documented CSS diagnosis in rural primary care practices to evaluate the relationship between CSS diagnoses, quality of life, symptom severity, and interactions with healthcare providers utilizing validated questionnaires. Subgroup analysis was performed on the IBS cohort. Mayo Clinic IRB approved the study.Key ResultsSeven hundred seventy‐five individuals out of 5000 completed the survey (15.5% response rate) with 264 (34%) reporting IBS. Only 3% (n = 8) of IBS patients reported IBS alone without comorbid CSS condition. Most respondents reported overlapping migraine (196, 74%), depression (183, 69%), anxiety (171, 64%), and fibromyalgia (139, 52%). IBS patients with more than two comorbid CS condition showed significantly higher symptom severity with linear increase. Quality of life was lower in IBS with comorbid conditions, particularly in patients with IBS and RLS (mean EQ5‐D 0.36 vs. 0.8 in IBS only, p < 0.01). Quality of life declined as number of comorbid conditions increased.Conclusions & InferencesPatients with IBS often have multiple CS disorders which increases symptom severity and lowers quality of life. Understanding the impact of multiple CSS diagnoses and treating these as a global condition may improve patient experience.
Investigation of Shared Genetic Risk Factors Between Parkinson's Disease and Cancers
Sugier, Pierre‐Emmanuel , Lucotte, Elise A. , Domenighetti, Cloé , Law, Matthew H. , Iles, Mark M. , Brown, Kevin M. , McKay, James , Hung, Rayjean J., Karimi, Mojgan, Bacq‐Daian, Delphine, Boland, Anne , Kesminiene, Ausrele , Vathaire, Florent de , Guénel, Pascal , Sreelatha, Ashwin Ashok Kumar , Grover, Sandeep , May, Patrick , Radivojkov‐Blagojevic, Milena , Lichtner, Peter , Singleton, Andrew , Hernandez, Dena G., Edsall, Connor , Mellick, George D. , Zimprich, Alexander , Pirker, Walter , Kõks, Sulev, Lesage, Suzanne , Chartier‐Harlin, Marie‐Christine , Brockmann, Kathrin , Deutschländer, Angela , Hadjigeorgiou, G., Simitsi, Athina Maria, Petrucci, Simona , Straniero, Letizia , Brighina, Laura , Ferrarese, Carlo , Annesi, Grazia , Quattrone, Andrea , Nakayama, Akiyoshi , Kim, Yun Joong , Kolber, Pierre, Warrenburg, Bart P.C. van de , Bloem, Bastiaan R. , Aasly, Jan , Toft, Mathias , Ferreira, Joaquim J. , Bardien, Soraya , Tolosa, Eduardo , Ezquerra, Mario , Pástor, Pau , Wirdefeldt, Karin , Ran, Caroline , Puschmann, Andreas , Ygland, Emil , Morrison, Karen , Krainc, Dimitri , Burbulla, Lena F. , Krüger, Rejko , Gasser, Thomas , Sharma, Manu , Hung, Rayjean J. , Schulte, Claudia , Grover, Sandeep , May, Patrick , Bobbili, Dheeraj R , Zimprich, Alexander , Lang, Anthony E , Corvol, Jean-Christophe , Mutez, Eugénie , Brockman, Kathrin , Deutschländer, Angela B , Hadjigeorgiou, Georges M., Stefanis, Leonidas , Valente, Enza Maria , Chung, Sun Ju , Toft, Mathias , Ferreira, Joaquim J , Bardien, Soraya , Tolosa, Eduardo , Ezquerra, Mario , Tan, Manuela , Sharma, Manu , Elbaz, Alexis , Hung, Rayjean J , Puschmann, Andreas , Guénel, Pascal , Law, Matthew H , Iles, Mark M , Pastor, Pau , Koks, Sulev , Domenighetti, Cloé , Amos, Christopher I. , Olaso, Robert , Deleuze, Jean‐François , Lesueur, Fabienne , Ostroumova, Evgenia , Schulte, Claudia , Bobbili, Dheeraj Reddy , Rogaeva, Ekaterina A. , Lang, Anthony E. , Taba, Pille , Brice, Alexis , Corvol, Jean‐Christophe , Mutez, Eugénie , Dardiotis, Efthimios , Simitsi, Athina‐Maria , Valente, Enza Maria , Zecchinelli, Anna , Pezzoli, Gianni , Gagliardi, Monica , Matsuo, Hirotaka , Hattori, Nobutaka , Nishioka, Kenya , Pihlstrøm, Lasse , Guedes, Leonor Correia , Carr, Jonathan , Díez-Fairén, Mónica , Pedersen, Nancy L. , Belin, Andrea Carmine , Clarke, Carl E , Farrer, Matthew J. , Truong, Thérèse , Elbaz, Alexis

Movement Disorders | February 14, 2023 | Volume: 38 | Issue: 4 | Pages: 604-615

10.1002/mds.29337 | PMID 36788297 Get It

Abstract Background Epidemiological studies that examined the association between Parkinson's disease (PD) and cancers led to inconsistent results, but they face a number of methodological difficulties. Objective We used results from genome‐wide association studies (GWASs) to study the genetic correlation between PD and different cancers to identify common genetic risk factors. Methods We used individual data for participants of European ancestry from the Courage‐PD (Comprehensive Unbiased Risk Factor Assessment for Genetics and Environment in Parkinson's Disease; PD, N = 16,519) and EPITHYR (differentiated thyroid cancer, N = 3527) consortia and summary statistics of GWASs from iPDGC (International Parkinson Disease Genomics Consortium; PD, N = 482,730), Melanoma Meta‐Analysis Consortium (MMAC), Breast Cancer Association Consortium (breast cancer), the Prostate Cancer Association Group to Investigate Cancer Associated Alterations in the Genome (prostate cancer), International Lung Cancer Consortium (lung cancer), and Ovarian Cancer Association Consortium (ovarian cancer) (N comprised between 36,017 and 228,951 for cancer GWASs). We estimated the genetic correlation between PD and cancers using linkage disequilibrium score regression. We studied the association between PD and polymorphisms associated with cancers, and vice versa, using cross‐phenotypes polygenic risk score (PRS) analyses. Results We confirmed a previously reported positive genetic correlation of PD with melanoma (G corr = 0.16 [0.04; 0.28]) and reported an additional significant positive correlation of PD with prostate cancer (G corr = 0.11 [0.03; 0.19]). There was a significant inverse association between the PRS for ovarian cancer and PD (odds ratio [OR] = 0.89 [0.84; 0.94]). Conversely, the PRS of PD was positively associated with breast cancer (OR = 1.08 [1.06; 1.10]) and inversely associated with ovarian cancer (OR = 0.95 [0.91; 0.99]). The association between PD and ovarian cancer was mostly driven by rs183211 located in an intron of the NSF gene (17q21.31). Conclusions We show evidence in favor of a contribution of pleiotropic genes to the association between PD and specific cancers. © 2023 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
Equity360: Gender, Race, and Ethnicity—All Orthopaedic Surgeon Burnout Is Not Created Equal
Lajam, Claudette M. , O’Connor, Mary I.

Clinical Orthopaedics & Related Research | February 3, 2023 | Volume: 481 | Issue: 3 | Pages: 451-454

10.1097/corr.0000000000002574 | PMID 36735584 Get It

P550 Characterisation of hospitalised patients with ulcerative colitis treated with tofacitinib in the OCTAVE clinical programme for up to 7.8 years
Taxonera, Carlos , Ha, Christina , Fortes, M del Pilar, Gardiner, Sean , Mundayat, Rajiv , Taxonera, C , Fortes, María del Pilar , Ghosh, Subrata , Connor, Susan Jane

Journal of Crohn's and Colitis | January 30, 2023 | Volume: 17 | Issue: Supplement_1 | Pages: i678-i680

10.1093/ecco-jcc/jjac190.0680 Get It

Abstract Background Tofacitinib is an oral, small molecule Janus kinase inhibitor for the treatment of ulcerative colitis (UC). Efficacy and safety of tofacitinib were demonstrated in the OCTAVE clinical programme.1,2 Here, we present an analysis of the number and causes of UC-related hospitalisations during the OCTAVE clinical programme. Methods This descriptive analysis comprised patients (pts) hospitalised for UC who received placebo or tofacitinib 10 mg twice daily (BID) in OCTAVE Induction 1&2 (NCT01465763; NCT01458951)1, and pts who received placebo, or tofacitinib 5 or 10 mg BID in OCTAVE Sustain (NCT01458574)1, or ≥1 dose of tofacitinib in OCTAVE Open (NCT01470612)2; it includes data from pts with ≤7.8 years of tofacitinib exposure. We examined the demographic and clinical characteristics, proportions, causes and other aspects of UC-related hospitalisations in pts treated with placebo or tofacitinib in the OCTAVE clinical programme. Results Overall, 1139 pts with UC were included in this analysis. Demographic and disease characteristics of pts with UC-related hospitalisations were generally similar across treatment groups in each study; most pts were &lt;40 years old, had pancolitis, a mean total Mayo score &gt;8, prior treatment with oral corticosteroids and immunosuppressants (Table 1). Ninety-five pts had UC-related hospitalisations; of whom 92 had one UC-related hospitalisation and 3 pts were hospitalised twice (Table 2). In OCTAVE Induction 1&2, OCTAVE Sustain and OCTAVE Open, 2.1%, 1.0% and 6.6% of pts, respectively, had UC-related hospitalisations with tofacitinib 10 mg BID vs 1.0% and 2.9% of pts receiving tofacitinib 5 mg BID in OCTAVE Sustain and OCTAVE Open, and 3.4% and 4.0% of pts receiving placebo in OCTAVE Induction 1&2 and OCTAVE Sustain, respectively. UC-related hospitalisations did not lead to temporary treatment discontinuations in most pts (Table 2). The most frequent cause of UC-related hospitalisations in tofacitinib- and placebo-treated pts was non-surgical UC-related events (ie, UC flares; Table 2). Conclusion UC-related hospitalisations were infrequent in the OCTAVE clinical programme, and rates were generally lower than those reported in a real-world assessment of pts with UC treated with biological therapies.3 Most hospitalised pts were aged &lt;40 years with severe disease and prior corticosteroid and immunosuppressant exposure. The most common cause of hospitalisation was non-surgical UC-related events. References: 1. Sandborn WJ et al. N Engl J Med 2017;376:1723-1736. 2. Sandborn WJ et al. Aliment Pharmacol Ther 2022;55:464-478. 3. Bressler B et al. J Crohn’s Colitis 2021;15:1694-1706.
Genome-wide analysis of aberrant position and sequence of plasma DNA fragment ends in patients with cancer
Budhraja, Karan K. , McDonald, Bradon R. , Stephens, Michelle D. , Contente‐Cuomo, Tania , Markus, Havell , Farooq, Maria , Favaro, Patricia Filippsen, Connor, Sydney , Byron, Sara A. , Egan, Jan B. , McDaniel, Timothy K., Sekulić, Aleksandar , Tran, Nhan L. , Prados, Michael D. , Pockaj, Barbara A. , LoRusso, Patricia , Bryce, Alan H. , Trent, Jeffrey M. , Favaro, Patricia F , Ernst, Brenda , Prados, Michael D , Borad, Mitesh J , Berens, Michael E , Pockaj, Barbara A , Bryce, Alan H , Trent, Jeffrey M , Murtaza, Muhammed , Tran, Nhan L , Ernst, Brenda , Borad, Mitesh J. , Berens, Michael E. , Murtaza, Muhammed

Science Translational Medicine | January 11, 2023 | Volume: 15 | Issue: 678 | Pages: No page available

10.1126/scitranslmed.abm6863 | PMID 36630480 Get It

Genome-wide fragmentation patterns in cell-free DNA (cfDNA) in plasma are strongly influenced by cellular origin due to variation in chromatin accessibility across cell types. Such differences between healthy and cancer cells provide the opportunity for development of novel cancer diagnostics. Here, we investigated whether analysis of cfDNA fragment end positions and their surrounding DNA sequences reveals the presence of tumor-derived DNA in blood. We performed genome-wide analysis of cfDNA from 521 samples and analyzed sequencing data from an additional 2147 samples, including healthy individuals and patients with 11 different cancer types. We developed a metric based on genome-wide differences in fragment positioning, weighted by fragment length and GC content [information-weighted fraction of aberrant fragments (iwFAF)]. We observed that iwFAF strongly correlated with tumor fraction, was higher for DNA fragments carrying somatic mutations, and was higher within genomic regions affected by copy number amplifications. We also calculated sample-level means of nucleotide frequencies observed at genomic positions spanning fragment ends. Using a combination of iwFAF and nine nucleotide frequencies from three positions surrounding fragment ends, we developed a machine learning model to differentiate healthy individuals from patients with cancer. We observed an area under the receiver operative characteristic curve (AUC) of 0.91 for detection of cancer at any stage and an AUC of 0.87 for detection of stage I cancer. Our findings remained robust with as few as 1 million fragments analyzed per sample, demonstrating that analysis of fragment ends can become a cost-effective and accessible approach for cancer detection and monitoring.
Brain network decoupling with increased serum neurofilament and reduced cognitive function in Alzheimer’s disease
Wheelock, Muriah D. , Strain, Jeremy F. , Mansfield, Patricia K. , Tu, Jiaxin Cindy , Tanenbaum, Aaron , Preische, Oliver, Chhatwal, Jasmeer P. , Cash, David M. , Fagan, Anne M. , Fox, Nick C. , Graff‐Radford, Neill R. , Hassenstab, Jason , Jack, Clifford R. , Xiong, Chengjie , Perrin, Richard J. , Xiong, Chengjie , Morris, John C. , Ances, Beau M. , Eggebrecht, Adam T. , Gordon, Brian A. , Network, the Dominantly Inherited Alzheimer, Adams, Sarah , Araki, Aki, Barthélemy, Nicolas R. , Bechara, Jacob , Berman, Sarah , Bodge, Courtney, Brandon, Susan E. , Brooks, W. K. , Brosch, Jared R. , Buck, Jill , Buckles, Virginia, Cash, Lisa, Chen, Charlie, Chrem, Patricio, Chua, Jasmin, Chui, Helena, Cruchaga, Carlos , Day, Gregory S. , Cruz, Chrismary De La, Denner, Darcy, Diffenbacher, Anna, Dincer, Aylin , Donahue, Tamara, Egido, Noelia , Esposito, Bianca, Farlow, Marty, Feldman, Becca , Fitzpatrick, Colleen , Franklin, Erin , Friedrichsen, Nelly, Gardener, Samantha L. , Goate, Alison , Goldberg, Sarah B. , Gonzalez, Alyssa, Gräber‐Sultan, Susanne, Graham, Morgan, Gray, Julia, Gremminger, Emily, Groves, Alex, Haass, Christian , Häsler, Lisa M., Hellm, Cortaiga, Herries, Elizabeth, Hoechst-Swisher, Laura, Hornbeck, Russ C. , Igor, Yakushev, Ihara, Ryoko , Ikonomović, Snežana, Ishii, Kenji , Jerome, Gina, Käser, Stephan, Keefe, Sarah , Klunk, William E. , Koudelis, Deb, Kuder-Buletta, Elke, Laske, Christoph , Martinez, Rita, Mason, Neal Scott, Mawuenyega, Kwasi G., Mejia, Arlene, Morenas‐Rodríguez, Estrella , Mori, Hiroshi , Mountz, James M. , Mummery, Cath, Nadkami, Neelesh, Nagamatsu, Akemi, Neimeyer, Katie, Norton, Joanne, Nuscher, Brigitte , Obermüller, Ulricke, Patira, Riddhi , Ping, Lingyan, Ringman, John M. , Salloway, Stephen , Senda, Michio , Seyfried, Nick , Shady, Kristine, Sigurdson, Wendy, Smith, Lori, Snitz, Beth E. , Sohrabi, Hamid R. , Stephens, Sochenda, Taddei, Kevin , Thompson, Sarah , Vöglein, Jonathan , Wang, Peter, Weamer, Elise A., Xu, Jinbin , Cruchaga, Carlos , Fagan, Anne M , Fox, Nick C , Graff-Radford, Neill R , Hassenstab, Jason , Jack, Clifford R , Karch, Celeste M , Xiong, Chengjie , McDade, Eric M , Schofield, Peter R , Xiong, Chengjie , Morris, John C , Bateman, Randall J , Jucker, Mathias , Benzinger, Tammie L S , Ances, Beau M , Eggebrecht, Adam T , Gordon, Brian A , Cruchaga, Carlos , Day, Gregory S , Vöglein, Jonathan , Cash, David M , Goate, Alison M , Berman, Sarah , Karch, Celeste M. , McDade, Eric , Schofield, Peter R. , Bateman, Randall J. , Benzinger, Tammie L.S. , Network, the Dominantly Inherited Alzheimer, Allegri, Ricardo , Brandon, Susan, Brooks, William (Bill), Buck, Jill, Carter, Kathleen, Douglas, Jane, Duong, Duc M , Feldman, Becca, Fitzpatrick, Colleen, Flores, Shaney , Fujii, Hisako , Ghetti, Bernardino , Goldman, Jill , Grilo, Miguel, Hofmann, Anna, Holtzman, David M. , Ikeuchi, Takeshi , Johnson, Erik C. B. , Kasuga, Kensaku , Koeppe, Robert A. , Lee, Jae‐Hong , Levey, Allan I. , Li, Yan , López, Oscar L. , Marsh, Jacob, Martins, Ralph N. , Masters, Colin L. , McCullough, Austin , Niimi, Yoshiki , Noble, James M. , O’Connor, Antoinette , Ping, Lingyan, Renton, Alan , Sánchez‐Valle, Raquel , Shimada, Hiroyuki , Smith, Jennifer A. , Thompson, Sarah, Wang, Qing , Xu, Xiong

Brain | January 10, 2023 | Volume: 146 | Issue: 7 | Pages: 2928-2943

10.1093/brain/awac498 | PMID 36625756 Get It

Abstract Neurofilament light chain, a putative measure of neuronal damage, is measurable in blood and CSF and is predictive of cognitive function in individuals with Alzheimer’s disease. There has been limited prior work linking neurofilament light and functional connectivity, and no prior work has investigated neurofilament light associations with functional connectivity in autosomal dominant Alzheimer’s disease. Here, we assessed relationships between blood neurofilament light, cognition, and functional connectivity in a cross-sectional sample of 106 autosomal dominant Alzheimer’s disease mutation carriers and 76 non-carriers. We employed an innovative network-level enrichment analysis approach to assess connectome-wide associations with neurofilament light. Neurofilament light was positively correlated with deterioration of functional connectivity within the default mode network and negatively correlated with connectivity between default mode network and executive control networks, including the cingulo-opercular, salience, and dorsal attention networks. Further, reduced connectivity within the default mode network and between the default mode network and executive control networks was associated with reduced cognitive function. Hierarchical regression analysis revealed that neurofilament levels and functional connectivity within the default mode network and between the default mode network and the dorsal attention network explained significant variance in cognitive composite scores when controlling for age, sex, and education. A mediation analysis demonstrated that functional connectivity within the default mode network and between the default mode network and dorsal attention network partially mediated the relationship between blood neurofilament light levels and cognitive function. Our novel results indicate that blood estimates of neurofilament levels correspond to direct measurements of brain dysfunction, shedding new light on the underlying biological processes of Alzheimer’s disease. Further, we demonstrate how variation within key brain systems can partially mediate the negative effects of heightened total serum neurofilament levels, suggesting potential regions for targeted interventions. Finally, our results lend further evidence that low-cost and minimally invasive blood measurements of neurofilament may be a useful marker of brain functional connectivity and cognitive decline in Alzheimer’s disease.