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605 citation(s) found for "Ibrahim, M".

KMT2Ar, but not other high-risk genetics, adversely impacts outcomes in adult patients with relapsed/refractory (R/R) Philadelphia chromosome negative B-cell acute lymphoblastic leukemia (B-ALL) treated with brexucabtagene autoleucel (Brexu-cel)
Leonard, Jessica, Ladha, Abdullah, Faramand, Rawan, Roloff, Gregory, Valtis, Yannis, Tan, Virginia, Miller, Katharine, Zhang, Amy, Grunwald, Michael, Kota, Vamsi, Boccucci, Jacob, Ulrickson, Matthew, Al-Darobi, Ali, Hill, LaQuisa, Muhsen, Ibrahim, Sasine, Joshua, Advani, Anjali, Sandhu, Karamjeet, Reshef, Ran, Luskin, Marlise, Chen, Evan, Lin, Chenyu, Cassaday, Ryan, Kopmar, Noam, Solh, Melhem, Lee, Catherine, Bobillo, Silvina Odstrcil, Tsai, Stephanie, O'Connor, Timothy, Hilal, Talal, Park, Jae, Vasu, Sumithira, Bezerra, Evandro, O'Dwyer, Kristen, Moore, Jozal, Wang, Eunice, McCauley, Ross, Majhail, Navneet, Ramakrishnan, Aravind, Mountjoy, Luke, Malik, Shahbaz, Battiwalla, Minoo, Shaughnessy, Paul, Mathews, John, Srinagesh, Hrishikesh, Sutherland, Katherine, Jamy, Omer, Mohty, Razan, Kumaran, Muthu, Hoeg, Rasmus, Oliai, Caspian, Lill, Georgia, Stock, Wendy, Schwartz, Marc, Othman, Tamer, Koura, Divya, Dykes, Kaitlyn, Logan, Aaron, Daunov, Michael, Byrd, Ken, Yalniz, Fevzi, Bachanova, Veronika, Tracy, Sean, Grover, Punita, Connor, Matthew, Yaghmour, George, Gatell, Vivian Irizarry, Jackson, Clayton, Oluwole, Olalekan, Dholaria, Bhagirathbhai, Frey, Noelle, Muffly, Lori, Shah, Bijal, Aldoss, Ibrahim, Muffly, Lori , Muffly, Lori , Leonard, Jessica, Ladha, Abdullah, Faramand, Rawan, Roloff, Gregory, Valtis, Yannis, Tan, Virginia, Miller, Katharine, Zhang, Amy, Grunwald, Michael, Kota, Vamsi, Boccucci, Jacob, Ulrickson, Matthew, Al-Darobi, Ali, Hill, LaQuisa, Muhsen, Ibrahim, Sasine, Joshua, Advani, Anjali, Sandhu, Karamjeet, Reshef, Ran, Luskin, Marlise, Chen, Evan, Lin, Chenyu, Cassaday, Ryan, Kopmar, Noam, Solh, Melhem, Lee, Catherine, Bobillo, Silvina Odstrcil, Tsai, Stephanie, O'Connor, Timothy, Hilal, Talal, Park, Jae, Vasu, Sumithira, Bezerra, Evandro, O'Dwyer, Kristen, Moore, Jozal, Wang, Eunice, McCauley, Ross, Majhail, Navneet, Ramakrishnan, Aravind, Mountjoy, Luke, Malik, Shahbaz, Battiwalla, Minoo, Shaughnessy, Paul, Mathews, John, Srinagesh, Hrishikesh, Sutherland, Katherine, Jamy, Omer, Mohty, Razan , Kumaran, Muthu, Hoeg, Rasmus, Oliai, Caspian, Lill, Georgia, Stock, Wendy, Schwartz, Marc, Othman, Tamer, Koura, Divya, Dykes, Kaitlyn, Logan, Aaron, Daunov, Michael, Byrd, Ken, Yalniz, Fevzi, Bachanova, Veronika, Tracy, Sean, Grover, Punita, Connor, Matthew, Yaghmour, George, Gatell, Vivian Irizarry, Jackson, Clayton, Oluwole, Olalekan, Dholaria, Bhagirathbhai, Frey, Noelle, Shah, Bijal, Aldoss, Ibrahim

Blood | December 4, 2025 | Volume: 146 | Issue: Supplement 1 | Pages: 3365-3365

10.1182/blood-2025-3365 Get It

Abstract Introduction: Brexu-cel is a highly effective treatment for R/R B-ALL, with complete responses achieved in 71% of patients (pts) treated in the pivotal ZUMA-3 trial. Patients with B-ALL with high-risk (HR) genetics are known to have inferior outcomes with chemotherapy, but little is known about the influence of HR ALL genetics on responses to chimeric antigen receptor (CAR)-T in adults. In this study, we assessed the impact of HR ALL genetics on outcomes in a large cohort of adult patients treated with brexu-cel for R/R Philadelphia chromosome (Ph)-negative B-ALL. Methods: Patient characteristics and outcomes were obtained from the Real-World Outcomes Collaborative of CAR-T in Adult ALL (ROCCA) database which includes data from 40 U.S. centers. NCCN guidelines (NCCN Guidelines in Oncology, ALL v2.2025) were used to define HR B-ALL genetics; lack of HR genetics was defined as standard-risk (SR). The primary outcome was event-free survival (EFS), defined as lack of response, disease progression, or death from any cause. Secondary outcomes were overall survival (OS), relapse free survival (RFS) and response rates including complete response (CR), CR incomplete count recovery (CRi), measurable residual disease negative CR (MRD-) by flow or NGS and progressive disease (PD). Multivariable models were adjusted for age, pre-infusion blast percentage, prior allo-HCT, and post CAR-T allo-HCT (modeled as a time-varying covariate). Results: The cohort included 286 pts: 169 with HR and 117 with SR B-ALL. The HR cohort included TP53m (n=24, 14%), KMT2Ar (n=16, 9%), CRLF2r (n=65, 39%) and other HR genetics such as JAK2 and other Ph-like, IKZF1, complex cytogenetics (n=64, 38%). Relative to SR pts, HR pts were more commonly Hispanic (50% vs 28%). HR and SR pts had similar disease burden pre-apheresis (>5% blasts: 58% vs 53%), prior blinatumomab (60% vs 58%), prior inotuzumab (42% vs 46%), and prior allo HCT (27% vs 37%). The presence of CNS disease (11% HR vs 12% SR) and extramedullary disease (EMD, 22% HR vs 29% SR) at apheresis was also similar. CR/CRi was achieved in 90.5% of evaluable HR pts (n=147) and 90.2% of evaluable SR pts (n=102); MRD- rates were also similar between HR and SR pts at 78.9% and 78.2% respectively. In unadjusted analyses, EFS did not significantly differ between HR pts (median 9.6 mos; 1-yr: 46%, 95% CI 38%-54%) and SR pts (median 11.6 mos; 1-yr: 48%, 95% CI 38%- 58%). Median RFS (HR: 12.2 mos, SR: 13.3 mos) and median OS (HR: 22.4 mos, SR: 21.0 mos) were also similar. Multivariable models demonstrated no significant associations between HR B-ALL and EFS (HR 1.09, 95% CI 0.73-1.63), RFS (HR 1.13, 95% CI 0.71-1.80), or OS (HR 0.96, 95% CI 0.62- 1.48) relative to SR ALL. 28% of HR patients and 21% of SR patients underwent consolidative allo-HCT. Among the HR subgroup, CR/CRi rate was lowest in KMT2Ar (71%) relative to TP53m (95%), CRLF2r (95%), and other HR genetics (89%). The median EFS was lowest in KMT2Ar (4.1 mos), followed by TP53m (6.9 mos), CRLF2r (11.6 mos), and other HR (11.1 mos). Median OS was also lowest in KMT2Ar (6.8 mos) vs 22.4 mos in TP53m and not reached in CRLF2r or other HR. PD was highest in KMT2Ar pts (29%), as compared to 11% HR other, 10% SR, and 5% TP53 and CRLF2r. The rate of relapse among those that achieved CR across the groups was similar and ranged between 28% -40%. Rates of CD19 negative relapse were similar between all subgroups (13%-15%), however 21% of KMT2A pts underwent myeloid transformation as compared 0% for TP53 and CRLF2 pts, and 2% among other HR and SR pts. 25% of KMT2Ar patients underwent consolidative allo-HCT as compared to 32% CRLF2 pts, 29% TP53 pts, 25% other HR pts and 21% SR pts. Multivariable models evaluating the different genomic subgroups demonstrated that relative to SR B-ALL, only KMT2Ar was associated with inferior OS (HR 3.17, 95% CI 1.53-6.58, p=0020). No associations were seen between HR subgroups and EFS. Conclusion: To our knowledge, this analysis represents the largest examination of adult B-ALL recipients of CAR-T assessed by genomic risk group. We found that response rates and survival outcomes following brexu-cel were similar among HR and SR B-ALL pts, including pts with TP53m and CRLF2r. However, pts with KMT2Ar had lower response rates and dismal EFS and OS, with higher rates of PD and myeloid transformation at relapse, suggesting that alternative strategies are necessary to improve outcomes for patients with R/R KMT2Ar B-ALL.
Complex Aorto-Spinal Fistula With Multifocal Abscesses in an Immunosuppressed Elderly Man Following Endovascular Aortic Repair
Henderson, Adam, Hayek, Mario El , McKinney, M, Clair, Jesse W St, Adám, H , Adam, Henderson , Ibrahim, Mohamed G, El Hayek, Mario, McKinney, Margaret E, St Clair Iv, Jesse W, Ibrahim, Mohamed Gamal

American Journal of Case Reports | December 4, 2025 | Volume: 27 | Issue: No issue available | Pages: No page available

10.12659/ajcr.949903 | PMID 41520165 Get It

Surgical management of small bowel adenocarcinoma in Crohn disease: a multicenter retrospective analysis
Violante, Tommaso , Ferrari, Davide, Rottoli, Matteo , Novelli, Marco, Aboelmaaty, Sara , Gomaa, Ibrahim A. , Sassun, Richard, Sileo, Annaclara , Shawki, Sherief S., Wignakumar, Anjelli , Dourado, Justin, Syed, Ajia, Wexner, Steven, Calini, Giacomo, Castagna, Giovanni , Isopi, Claudio , Holubar, Stefan, Alipouriani, Ali , Unal, Ece , Mathis, Kellie L. , Calini, Giacomo , Violante, Tommaso , Novelli, Marco , Sassun, Richard , Aboelmaaty, Sara A, Gomaa, Ibrahim , Sassun, Richard , Sileo, Annaclara , Holubar, Stefan D , Alipouriani, Ali , Mathis, Kellie L , Calini, G , Ferrari, Davide , Larson, David W. , Shawki, Sherief , Dourado, Justin , Wexner, Steven, Greco, Nicola Maria , Holubar, Stefan D.

Inflammatory Bowel Diseases | December 3, 2025 | Volume: 32 | Issue: 5 | Pages: 914-921

10.1093/ibd/izaf312 | PMID 41456110 Get It

Abstract Background Patients with Crohn disease (CD) face an elevated risk of developing small bowel adenocarcinoma (SBA), a malignancy characterized by late-stage diagnosis and poor prognosis. In this study we aimed to characterize surgical management and oncologic outcomes for CD-associated SBA. Methods A retrospective review was conducted across 3 tertiary IBD centers, analyzing 99 patients with CD who underwent surgery for SBA between 1992 and 2025. Data included patient demographics, CD history, surgical details, and oncologic outcomes. Results The median time from CD diagnosis to SBA was 25 years. The SBA diagnosis was incidental in 74.8% of cases, discovered during surgery for other complications. Tumors were predominantly located in the ileum (80.8%) and showed aggressive features: 56.6% were poorly differentiated (grade 3), and 85.9% were pathologically advanced (T3/T4 on TNM staging). Nodal involvement was present in 45.5% of patients, and 18.2% had distant metastases at diagnosis. A complete (R0) resection was achieved in 90.9% of surgeries, with a 30-day morbidity rate of 26.3%. After a median follow-up of 36 months, the distant recurrence rate was 28.3%, and overall mortality was 27.3% (18.2% cancer related). Conclusion In patients with long-standing CD, SBA is typically an incidental diagnosis made at an advanced stage. While high rates of complete surgical resection are possible, the prognosis remains guarded due to aggressive tumor biology and high recurrence rates. These findings highlight a critical need for improved risk stratification to guide surveillance and for the development of evidence-based adjuvant treatment strategies.
Abstract 266: Efficacy and safety of mechanical thrombectomy in cervical artery dissection‐related stroke: A systematic review and meta‐analysis
Hamouda, A. M., Ramadan, Dalia Ibrahim , Kendall, Nicholas , Sayed, N., Atieh, Fatima , Kadirvel, Ramanathan , Kallmes, David F. , Derhab, Mohamed , Hamouda, A. M., Ramadan, D., Jazayeri, Seyed Behnam , Ghozy, Sherief

Stroke: Vascular and Interventional Neurology | December 2, 2025 | Volume: 5 | Issue: S1 | Pages: No page available

10.1161/svi270000_266 Get It

Introduction Mechanical thrombectomy (MT) is a well‐established treatment for acute ischemic stroke (AIS) due to large vessel occlusion (LVO). However, its role in cervical artery dissection‐related (CeAD) LVO remains debated due to anatomical complexities and procedural challenges. This systematic review and meta‐analysis aims to evaluate the safety, efficacy, and clinical outcomes of MT in patients with AIS due to CeAD‐related LVO, compared with other AIS etiologies. Methods PubMed, Embase, and Scopus were systematically searched from inception through March 2025. Comparative observational studies evaluating the use of MT in adult patients with AIS due to LVO were included, specifically those comparing outcomes in those with CeAD versus non‐CeAD etiologies. Most studies were retrospective and multicentric. Eligible interventions included stent retriever thrombectomy, direct aspiration (ADAPT), or combined approaches. Results Nine studies with a total of 4889 patients were included, comprising 446 CeAD‐related and 4443 non‐CeAD LVO cases. MT for CeAD‐related AIS showed no statistically significant difference in successful recanalization compared with non‐CeAD cases (OR:0.81, CI: [0.63,1.04], p=0.10). However, CeAD patients had significantly higher rates of 90‐day functional independence (mRS 0‐2) (OR:2.17, CI: [1.55, 3.05], p < 0.0001) and lower 90‐day mortality (OR:0.34, CI: [0.22, 0.53], p < 0.0001). Rates of distal embolization (OR:1.60, CI: [0.69, 3.70], p = 0.27), symptomatic ICH (OR:0.84, CI: [0.51, 1.38], p=0.49), or iatrogenic dissection (OR:1.58, CI: [0.59, 4.22], p=0.36) did not differ significantly. Conclusions Mechanical thrombectomy in CeAD‐related LVO is safe and associated with clinical outcomes comparable to patients with non‐CeAD acute ischemic causes. They demonstrated a similar patient safety profile, such as functional outcomes and mortality.
Age-Adjusted Mortality Trends in Acute Tubulointerstitial Nephritis by Gender, Race, and Census Region in the United States: A CDC-WONDER Study, 1999-2020
Khan, Muhammad Ali , Abujlambo, Abdallah I.m., Abujlambo, Abdallah Ibrahim , Hamdar, Hiba , Jawdeh, Bassam G. Abu

Journal of the American Society of Nephrology | December 1, 2025 | Volume: 36 | Issue: 10S | Pages: No page available

10.1681/asn.2025aeh7g84q Get It

Combining Pirfenidone With Mycophenolate Mofetil for Systemic Sclerosis–Related Interstitial Lung Disease (Scleroderma Lung Study III ): An Investigator‐Initiated, Multicenter, Randomized, Double‐Blind, Pl
Khanna, Dinesh , Spino, Cathie , Kleerup, Eric C., Harui, Airi, Ibrahim, Grace, Kim, Grace Hyun J. , Huang, Suiyuan, McLain, Richard, Tu, Yi‐Hsuan, Steen, Virginia , Weigt, S. Samuel , Lee, Joyce , Fischer, Aryeh , Scholand, Mary Beth , Gordon, Jessica , Dellaripa, Paul F. , Rosas, Iván O. , Hunninghake, Gary M. , Trojanowski, Marcin A. , Dematte, Jane E. , Hsu, Vivien , Domsic, Robyn T. , Raghu, Ganesh , Boente, R. , Roth, Michael D. , Investigators, the Scleroderma Lung Study III, Kim, Grace Hyun J , Nagaraja, Vivek , Silver, Richard M. , Gordon, Jessica K , Dellaripa, Paul F , Domsic, Robyn T , Mayes, Maureen D , Boente, Ryan D , Roth, Michael D , Khanna, Dinesh , Lee, Joyce S , Hunninghake, Gary M , Tashkin, Donald P. , Bernstein, Elana J. , Goldin, Jonathan , Nagaraja, Vivek , Simms, Robert W. , Mayes, Maureen D. , Investigators, the Scleroderma Lung Study III

ACR Open Rheumatology | November 26, 2025 | Volume: 7 | Issue: 12 | Pages: No page available

10.1002/acr2.70126 | PMID 41294296 Get It

Objective Mycophenolate mofetil (MMF) can stabilize or improve lung function in systemic sclerosis–related interstitial lung disease (SSc‐ILD). We hypothesized that combining MMF with pirfenidone (PFD) would produce a significantly more rapid and/or greater improvement in lung function. Methods A randomized (1:1), double‐blind, placebo (PLA)‐controlled phase 2 trial was conducted in SSc‐ILD in which patients received PFD or PLA (801 mg three times daily) along with MMF (1,500 mg twice daily) for 18 months. The primary outcome was change in percent predicted forced vital capacity (FVC‐%). Linear mixed‐effects models assessed treatment differences in a modified intention‐to‐treat population. Results Only fifty‐one of 150 intended subjects (34%) were randomized (MMF+PLA, n = 24; MMF+PFD, n = 27). The FVC‐% improved from baseline to 18 months by 2.24 ± 1.35 (least‐squares mean [LSM] ± SEM) in the MMF+PLA group and 2.09 ± 1.28 in the MMF+PFD group (LSM treatment difference −0.14; P = 0.93). Median time to achieve a ≥3% improvement in FVC‐% was numerically faster in the MMF+PFD versus MMF+PLA group (12.3 vs 17.8 months, respectively), but the difference was not significant ( P = 0.33). For secondary outcomes, only the change over 18 months in the Patient‐Reported Outcomes Measurement Information System 29‐item physical function score, favoring MMF+PFD, reached statistical significance ( P = 0.04). Although other related patient‐reported outcomes (PROs) numerically favored the MMF+PFD group, as did quantitative high‐resolution computed tomography measures of ILD, the differences between groups did not reach statistical significance. Early withdrawals from study medication and adverse events of special interest were numerically greater with MMF+PFD (n = 8 vs 2 and n = 20 vs 7, respectively). Conclusion In this underpowered study, there was no statistically significant treatment difference in overall change in FVC‐% between groups. MMF+PFD was not as well tolerated as MMF+PLA.
Polymorphic Ventricular Tachycardia After Cardioversion for AF with Tachycardia-induced Cardiomyopathy
Habib, Eiad , Abdelnabi, Mahmoud , Almakadma, Abdul Hakim , Eldeib, Abdulrhman, Sorajja, Dan , Nhat Pham, Hoang, Sardana, Mayank , Ibrahim, Ramzi , Smith, Sean Campbell , Pham, Hoang Nhat

Arrhythmia & Electrophysiology Review | November 24, 2025 | Volume: 14 | Issue: No issue available | Pages: No page available

10.15420/aer.2025.38 | PMID 41346408 Get It

Ventricular arrhythmias after electrical cardioversion for AF are rare. Most of these arrhythmias are related to QT prolongation, resulting from marked and sudden slowing of heart rates, treatment with Class III antiarrhythmic drugs or other QT-prolonging medications, and the ventricular repolarisation remodelling effect of electrical cardioversion. A case of polymorphic ventricular tachycardia post-cardioversion of rapid AF in a patient with tachycardia-induced cardiomyopathy and the use of amiodarone is reported.
Response to Letter Regarding “Sodium–Glucose Cotransporter‐2 Inhibitors and Stroke Risk in Patients With Atrial Fibrillation”
Mee, Xuan Ci , Ibrahim, Ramzi , Lim, Ghee Kheng, Abdelnabi, Mahmoud , Habib, Eiad , Lee, Justin Z. , Lester, Steven J., Scott, Luis R. , Sorajja, Dan , Ayoub, Chadi , Mee, Xuan Ci , Ibrahim, Ramzi , Ibrahim, Ramzi , Lim, Ghee Kheng, Pham, Hoang Nhat , Farina, Juan M. , Lee, Kwan , Arsanjani, Reza

Journal of Cardiovascular Electrophysiology | November 19, 2025 | Volume: 37 | Issue: 1 | Pages: 216-217

10.1111/jce.70189 | PMID 41255042 Get It

Reduction versus fusion in situ for isthmic spondylolisthesis: a systematic review and meta-analysis
Johnson, Sarah E. , Nguyen, Ryan, Papisetty, Karthik, Aljanaahi, Mahani, Pennington, Zach , Bydon, Mohamad , Katsos, Konstantinos, Pennington, Zach , Nguyen, Ryan, Michalopoulos, Giorgos D. , Nathani, Karim Rizwan , Ibrahim, Sufyan , Katsos, Konstantinos

Journal of Neurosurgery: Spine | November 17, 2025 | Volume: 44 | Issue: 1 | Pages: 62-71

10.3171/2025.4.spine241213 | PMID 41043182 Get It

OBJECTIVE Isthmic spondylolisthesis impacts up to 11.5% of the general population. For patients who have failed conservative therapy, decompression and fusion or decompression alone are options for surgical management. However, there remains debate as to whether reduction of mobile spondylolisthesis is integral to good patient outcomes. The present systematic review and meta-analysis aimed to address this by comparing clinical and radiological outcomes between patients treated with fusion in situ and those undergoing fusion with reduction of isthmic spondylolisthesis. METHODS The Scopus, EMBASE, Medline, and Cochrane databases were systematically queried on the basis of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to identify studies comparing treatment outcomes in patients with isthmic spondylolisthesis after in situ fusion or fusion with spondylolisthesis reduction. Endpoints of interest included Oswestry Disability Index (ODI) score, hospitalization duration, operative morbidity, and rates of surgical revision. Data from individual studies were aggregated using random-effects models to assess combined effects. RESULTS Of 277 identified studies, 7 studies were included with an aggregate 308 patients (143 underwent fusion in situ and 165 underwent reduction). Patients who underwent reduction for isthmic lumbar spondylolisthesis had significantly lower rates of pseudarthrosis at last follow-up (OR 0.22, p = 0.03). Estimated blood loss, operative time, hospitalization duration, change in ODI score, change in back pain (visual analog scale [VAS]), and reoperation rate did not differ significantly between groups. CONCLUSIONS For patients with isthmic spondylolisthesis, the present data suggest that fusion with reduction of spondylolisthesis may lower rates of pseudarthrosis as compared to in situ fusion. However, operative morbidity and improvement in patient-reported outcomes were similar between strategies.
Lack of epistatic interaction of SNCA with APOE in synucleinopathies
Saini, Prabhjyot, Estiar, Mehrdad A. , Krohn, Lynne , Mufti, Kheireddin , Ruskey, Jennifer A. , Asayesh, Farnaz , Laurent, Sandra B., Montplaisir, Jacques , Gagnon, Jean‐François , Désautels, Alex , Janes, Francesco , Bernardini, Andrea , Oertel, Wolfgang H. , Janzen, Annette , Figorilli, Michela , Puligheddu, Monica , Mollenhauer, Brit , Trenkwalder, Claudia , Sixel‐Döring, Friederike , Monaca, Christelle, Dijkstra, Femke , Viaene, Mineke , Abril, Beatriz, Anselmi, Victoria, Scholz, Sonja W. , Krohn, Lynne , Mufti, Kheireddin , Arnulf, Isabelle , Dauvilliers, Yves , Kemlink, David , Oertel, Wolfgang H , Kaivola, Karri , Janzen, Annette , Boeve, Brad , Rouleau, Guy Armand , Ibrahim, Abubaker , Stefani, Ambra , Hu, Michele T M , Scholz, Sonja W , Gan-Or, Ziv , Bernardini, Andrea , Janes, Francesco , Figorilli, Michela , Puligheddu, Monica , Yu, Eric , Rudakou, Uladzislau , Spiegelman, Dan , Arnulf, Isabelle , Dauvilliers, Yves , Gigli, Gian Luigi , Valente, Mariarosaria , Šonka, Karel , Plazzi, Giuseppe , Antelmi, Elena , Biscarini, Francesco , Cochen De Cock, Valérie , Heidbreder, Anna , Ferini-Strambi, Luigi , Boeve, Bradley F. , Postuma, Ronald B. , Ibrahim, Abubaker , Stefani, Ambra , Högl, Birgit , Gan‐Or, Ziv

Brain Communications | November 17, 2025 | Volume: 7 | Issue: 6 | Pages: No page available

10.1093/braincomms/fcaf455 | PMID 41341545 Get It

Abstract Two recent studies suggested that the APOE ε4 haplotype was associated with increased α-synuclein pathology in cell and mouse models. Genetic variants in the SNCA region have strong association with Parkinson’s disease (PD), dementia with Lewy bodies (DLB) and idiopathic REM sleep behaviour disorder (iRBD), while APOE is a genetic risk determinant for only DLB. To determine if genetic-level interactions between SNCA and APOE exists that can explain the protein-level association, we investigated the genotypic interaction of APOE and SNCA in cohorts of PD, DLB and iRBD. We analysed genome-wide association study (GWAS) data from 5229 PD patients and 5480 controls, 2610 DLB patients and 1920 controls, and 1055 iRBD patients and 3667 controls. We used logistic regression interaction models across all three cohorts independently between the (i) top GWAS signals of SNCA single nucleotide polymorphisms (SNPs) and APOE haplotypes and (ii) SNP×SNP and three-way SNP interaction across the entire coding region plus 200 kb flanking each gene. No significant interactions were found to be associated with any of the synucleinopathies after correction for multiple testing. Our results do not support a role for genetic interactions between APOE and SNCA across PD, DLB and iRBD. Since the tested genetic variants affect the expression and function of these proteins, it is likely that any interactions between them do not affect the risk of PD, DLB and iRBD.