Abstract
Background
Chimeric antigen receptor (CAR)-T cell therapy has been used to treat pediatric refractory or relapsed mature B-cell non-Hodgkin lymphoma (r/r MB-NHL) with significantly improved outcomes, but a proportion of patients display no response or experience relapse after treatment. To investigate whether tumor-intrinsic somatic genetic alterations have an impact on CAR-T cell treatment, the genetic features and treatment outcomes of 89 children with MB-NHL were analyzed.
Methods
89 pediatric patients treated at multiple clinical centers of the China Net Childhood Lymphoma (CNCL) were included in this study. Targeted next-generation sequencing for a panel of lymphoma-related genes was performed on tumor samples. Survival rates and relapse by genetic features and clinical factors were analyzed. Survival curves were calculated using a log-rank (Mantel-Cox) test. The Wilcox sum-rank test and Fisher’s exact test were applied to test for group differences.
Results
A total of 89 driver genes with somatic mutations were identified. The most frequently mutated genes were TP53 (66%), ID3 (55%), and ARID1A (31%). The incidence of ARID1A mutation and co-mutation of TP53 and ARID1A was high in patients with r/r MB-NHL (P = 0.006; P = 0.018, respectively). CAR-T cell treatment significantly improved survival in r/r MB-NHL patients (P = 0.00081), but patients with ARID1A or ARID1A and TP53 co-mutation had poor survival compared to those without such mutations.
Conclusion
These results indicate that children with MB-NHL harboring ARID1A or TP53 and ARID1A co-mutation are insensitive to initial conventional chemotherapy and subsequent CAR-T cell treatment. Examination of ARID1A and TP53 mutation status at baseline might have prognostic value, and risk-adapted or more effective therapies should be considered for patients with these high-risk genetic alterations.
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Introduction
Mature B-cell non-Hodgkin lymphoma (MB-NHL) accounts for 50–60% of non-Hodgkin lymphomas (NHLs) in children and adolescents [1,2,3] and is highly aggressive, with unique epidemiology and pathological features [1]. Despite its high intensity, short-course multichemotherapy has significantly improved the cure rate of patients [4, 5]; nevertheless, some children experience induction failure, refractoriness or recurrence (r/r), and the prognosis of r/r MB-NHL is generally poor, with a cure rate of less than 30% [6,7,8].
Chimeric antigen receptor (CAR)-T cell therapy is an emerging therapy that has been used to treat patients with r/r lymphoma, with significant improvement in clinical outcomes and an overall response rate of 52–82% [9,10,11]. In our previous study, the 18-month progression-free survival (EFS) rate with sequential CAR-T cell therapy was estimated to be 78% for r/r BL [12]. Although high remission rates after CAR-T cell therapy can be achieved in patients with r/r MB-NHL, some patients still experience relapse [11, 13,14,15]. In recent years, much attention has been given to clinical research on factors related to CAR-T cell therapy failure. Some studies have shown that intrinsic genetic changes may affect the treatment and prognosis of patients with lymphoma [16, 17]. However, to date, the effect of the preexisting genetic landscape of MB-NHL on CAR-T cell therapy has remained unclear, and despite recent studies in DLBCL [18], few studies have been based on children.
Therefore, we selected a cohort of 89 Chinese pediatric MB-NHL patients to analyze the relationship between mutation status and genetic characteristics and CAR-T cell therapy. We sought to understand the intrinsic molecular characteristics of r/r MB-NHL patients who are not sensitive to CAR-T cell therapy in an attempt to identify molecular predictors associated with this treatment. Identifying patients at high risk of relapse who may not benefit from immunochemotherapy and/or CAR-T cell therapy can provide a clinical basis for improving clinical management and treatment strategies for these lymphoma patients.
Patients and methods
Patients
A total of 89 patients treated at multiple clinical centers of the China Net Childhood Lymphoma (CNCL) from February 2019 to September 2021 were included in this retrospective study. Targeted next-generation sequencing (t-NGS) with a panel of lymphoma-related genes was performed on tumor samples (diagnostic [19] and staging criteria [20] are described in supplementary materials 1.1). All patients received at least first-line chemotherapy and were evaluated and followed up after treatment [21]. There were 41 patients with initial remission and 48 patients with r/r. Among the r/r patients 40 (details of the inclusion and exclusion (I/E) criteria are shown in supplementary materials 1.2) received CAR-T cell infusion between February 2019 and September 2021 and were evaluated for responses and adverse effects (see Supplementary material 1.3, 1.4 and 1.5). The cohort included 9 patients who received CD19 CAR-T cell therapy (ClinicalTrials #: ChiCTR-1,800,014,457), 1 patient who received CD20 CAR-T cell therapy (ClinicalTrials #: ChiCTR-1,800,014,457), 22 patients who received sequential CD19-22 CAR-T cell therapy (ClinicalTrials #: ChiCTR-1,800,014,457), and 8 patients who received CD19&22 or CD20&22 CAR-T cell therapy (ClinicalTrials #: ChiCTR-2,100,045,864). The lentiviral vector was prepared by Shanghai Yake Biotechnology Co., Ltd. This study was approved by the institutional review board of Beijing GoBroad Boren Hospital, in accordance with the Declaration of Helsinki (Approval numbers: 20,210,312-KS-001Y and 20,180,114-PJ-001). Patients (or their guardians) were required to provide written consent.
Definitions
Initial remission refers to achieving complete response (CR) after first-line chemotherapy. Relapsed or refractory (r/r) was defined as disease that was refractory (never obtaining a CR) or relapsed after first-line chemotherapy and had a partial response (PR) or no response (NR) as the best response to at least 2 cycles of salvage chemotherapy. Poor prognostic outcome was defined as meeting at least one of the following criteria: deceased, unresponsive to treatment and/or disease relapse.
Targeted next-generation sequencing and mutational analysis
t-NGS was used to detect the mutation status of 262 driver genes related to lymphoma to identify somatic mutations, including single-nucleotide variants (SNVs) and short insertions and deletions (InDels) in the patients. First, DNA was extracted from tumor tissue samples. The genomic DNA was fragmented to approximately 200 bp by enzyme digestion, and then end repair, adaptor ligation and PCR (polymerase chain reaction) were carried out to complete prelibrary construction. A complete set of probes provided by Agilent was used to capture the sequences of 262 genes (all coding exons), and the target fragments were enriched to generate the library. A NextSeq550 sequencer (Illumina) was used for 2*150 bp sequencing analysis. The human genome hg19 was used as a reference for sequence alignment and base identification. Mutation information was annotated by the information screening function based on public databases (dbSNP, 1000 Genomes, and ESP6500). The variant allele frequency (VAF) was calculated by the number of mutants reads over the number of total reads (Supplementary 1.6).
Statistical methods
Statistical analyses were carried out with SPSS statistics v.25 and R software v3.6.2. Actuarial survival analysis was estimated by the Kaplan–Meier method, and survival curves were generated using a log-rank (Mantel‒Cox) test. The Wilcox sum-rank test and Fisher’s exact test were applied to test for group differences. p values of 0.05 or below were considered statistically significant.
Overall survival (OS) was calculated from the date of the last CAR-T cell infusion to the date of last follow-up or death, and disease-free survival (DFS) was defined only for patients who achieved CR and was calculated from the date of CR after the last CAR-T cell treatment to the date of relapse or death regardless of cause. Follow-up visits for MB-NHL cases are scheduled every 3 to 6 months for the first 2 years and once every 6 months after 5 years. All patients were followed up until 30 September 2021.
Results
Clinical characteristics
The clinical data of the 89 patients are summarized in Table 1. The median age was 8 years old (range 0–18 years old). Of the patients, 63 had BL, accounting for most cases (73.8%), 11 (12.4%) had HGBL, 10 (11.2%) had DLBCL, and 5 had other types. This cohort predominantly consisted of males (73, 82.0%), approximately 5 times the number of females (16, 18.0%), and the sex composition was consistent with that of another study [22]. The major clinicopathological stages of the patients were stage III (43, 48.3%) and stage IV (42, 47.2%). Twenty-eight patients who achieved complete recovery or partial remission (CR) and achieved remission lasting more than 6 months after initial treatment were defined as the initial remission group (IR). Thirteen patients had CR after initial treatment, but remission lasted less than 6 months; these patients are still under follow-up. Forty-eight cases were r/r MB-NHL (r/r MB-NHL) (the groups are shown in Supplementary Table S1).
The median follow-up was 11.4 months (95% CI: 9.9–13.5 months). The one-year OS of r/r MB-NHL was 43.5% (95% CI, 29.4–64.3).
The mutation landscape of MB-NHL in children
The mutational profiles of 89 MB-NHL patients are presented in Supplemental Figure S1. We detected 324 somatic driver mutations involving 89 genes that have been reported in lymphomas with an impact on treatment decisions, diagnosis, or prognosis. On average, each patient carried 5 mutations, ranging between 1 and 13. Among patients with each mutation, 73 harbored at least three variants (82.0%), and 4 of them carried ≥ 10 mutations; one patient carried 13 mutations, the highest number detected.
The most commonly mutated genes were TP53 (in 59 of 89 patients; 66%), followed by ID3 (in 49 patients; 55%), ARID1A (in 28 patients; 31%), CCND3 (in 26 patients; 29%), DDX3X (in 23 patients; 26%), and GNA13 (in 14 patients; 16%) (Supplementary Fig. S1). The mutated genes are mainly related to the TP53 signaling pathway, chromatin remodeling, the cell cycle, epigenetics and the NF-κβ signaling pathway.
Differences between IR MB-NHL and r/r MB-NHL patients
By comparing the clinical characteristics of the patients with IR MB-NHL (n = 28) and those with r/r MB-NHL (n = 48), it was found that the age of the latter was significantly higher than that of the former (IR MB-NHL: median = 6.5 years, IQR: 4.25-10 years; r/r MB-NHL: median = 9 years, IQR: 7-13.75, P = 0.00043) (Fig. 1b and Supplementary Table S2). There are few studies on the correlation between age and prognosis in pediatric lymphoma, but our results are supported by evidence showing that pediatric NHL patients have a significantly better prognosis than adult patients with the same histological subtype [23]. There were no significant differences in clinicopathological stage, sex or CNS between the two groups (not shown).
In 28 IR MB-NHL patients, the most commonly mutated genes were TP53 (54%, 15/28), ID3 (50%, 14/28), CCND3 (36%, 10/28), DDX3X (25%, 7/28), MYC (25%, 7/28), and GNA13 (18%, 5/28). In 48 r/r patients, the most commonly mutated gene was TP53 (75%, 36/48), followed by ID3 (56%, 27/48), ARID1A (35%, 17/48), CCND3 (25%, 12/48), DDX3X (25%, 12/48), and GNA13 (17%, 8/48). Compared with MB-NHL, TP53 (75% vs. 54%) and ARID1A (35% vs. 7%) showed a higher incidence of mutation than IR MB-NHL (Fig. 1a and c), with the incidence of ARID1A mutation reaching a significant difference (P = 0.006, Fig. 1d). The results suggest that ARID1A mutations are enriched in resistant disease.
Focusing on the mutation patterns of TP53 and ARID1A, point mutations in the DNA-binding domain (DBD) were the main type for TP53. The TP53 R248 W/V/Q (4 vs. 2) mutation was more common in IR MB-NHL, but the TP53 R273H/C (8 vs. 3) mutation was more common in r/r MB-NHL patients. Patients with r/r MB-NHL showed a higher prevalence of frameshift and truncating mutations than IR MB-NHL, and these mutation patterns were the major pathogenic mutations found for ARID1A, leading to a loss of its function (Fig. 2c and d).
Further analysis of the VAF showed a significantly higher percentage of VAF for ARID1A and TP53 mutations in patients with r/r MB-NHLs than in patients with IR MB-NHL (TP53 VAF: IR MB-NHL: median = 20.33%, IQR: 0-47.4%, r/r MB-NHL: median = 53.1%, IQR: 0-83.8%, P = 0.0075; ARID1A VAF: IR MB-NHL: median = 0%, IQR: 0–0%, r/r MB-NHL: median = 0%, IQR: 0-43.4%, P = 0.0025).
Effects of mutations on the outcome of CAR-T cell therapy
Among the r/r MB-NHL patients, 40 were treated with CAR-T cell therapy. Twenty-two patients (55%) achieved CR and 12 patients (30%) achieved PR, with an Overall response rate (ORR) of 85% (34/40), according to the outcome assessment at the end of each CAR-T cell treatment.
The difference in r/r MB-NHL survival probability between patients treated with and without CAR-T cells was compared (patients with no survival data were excluded). It is worth noting that the median survival in patients treated with CAR-T cell therapy was more than one year (mOS = 12.6 months, 95% CI: 3.85-NA months), with a one-year survival rate of 52.6% and a two-year survival rate of more than 47.3% (Fig. 3). In comparison, patients who did not receive CAR-T cell treatment had poor prognosis, with a median survival of less than one month (P = 0.00081). The results showed that CAR-T cell treatment significantly improved the outcome of r/r MB-NHL.
These patients were divided based on the evaluation of the last CAR-T cell treatment into those who responded (CAR-T response patients (CR or PR), 25) and those who did not respond (CAR-T nonresponse patients (NR or PD), 15) to CAR-T cell therapy.
To further explore molecular markers associated with CAR-T cell treatment, we compared differences in gene mutation profiles between the patients who did and did not respond to CAR-T cell treatment. The results showed that the incidence of ARID1A mutation (65% vs. 24%) and the VAF of the gene mutation were significantly higher in patients who did not respond to CAR-T cell therapy than in patients who did respond (P = 0.042, Fig. 4d; P = 0.027, Fig. 4e, respectively).
Regarding the outcomes of patients treated with CAR-T cell therapy, survival analysis showed that compared with ARID1A wild-type patients, patients with ARID1A mutations had a poor response to CAR-T therapy and worse DFS (log-rank P = 0.0078, Figure S2b) and OS, with a median survival of 3.85 months (95% CI: 0.79-NA month; ARID1A-wt, mOS = not reached, log-rank P = 0.0095, Fig. 4c). These results show that ARID1A status may have an impact on CAR-T therapy.
It was also found that patients who did not respond to CAR-T cell therapy tended to have a higher incidence of TP53 mutations (93% vs. 54%) than those who did respond (P = 0.059, Fig. 4a) as well as a significantly higher VAF of TP53 (P = 0.0013, Fig. 4b). Survival analysis also showed that patients with TP53 mutations had a shorter median survival of 4.08 months (95% CI: 2.37-NA month) than those without TP53 mutations (TP53-wt, mOS = not reached, log-rank P = 0.11, Fig. 4f), which may indicate a trend of poor outcomes, but there was no significant difference in median OS (log-rank P = 0.11, Fig. 4f)) or DFS (log-rank P = 0.92, Figure S2a) between patients with TP53 mutations and patients without TP53 mutations.
Efficacy of TP53 and ARID1A co-mutation in CAR-T cell treatment
The above results show that the incidence of co-mutation of TP53 and ARID1A in patients with r/r MB-NHL was significantly higher than that in patients with initial remission (TP53-mut&ARID1A-mut: n = 16, TP53-mut&ARID1A-wt: n = 20, TP53-wt&ARID1A-mut: n = 1, TP53-wt&ARID1A-wt: n = 11, P = 0.018, Fig. 5a). Therefore, we sought to further understand whether TP53 and ARID1A co-mutations have an impact on CAR-T cell therapy. We found that patients (n = 14) with co-mutations of TP53 and ARID1A had a lower response rate to CAR-T cell treatment than the other groups. Only 5 of 14 patients showed a response,the overall response rate was only 36% (Fig. 5b).
Kaplan-Meier survival curves of the effects of ARID1A and TP53 status on OS and DFS showed significantly shorter OS and DFS in patients harboring ARID1A and TP53 co-mutations. (ARID1A-mut/TP53-mut: mOS = 2.37 months, 95% CI: 0.625 - NA months; TP53-wt/ARID1A-wt: mOS = not reached, log-rank p = 0.014, Fig. 5c) (ARID1A-mut/TP53-mut: mDFS = 4.06 months, 95% CI: 0.53-NA months; TP53-wt/ARID1A-wt: mDFS = not reached, log-rank p = 0.0039, Figure. S2c).
Therefore, although CAR-T cell treatment significantly improved survival in r/r MB-NHL patients, patients with ARID1A and TP53 co-mutation had poor outcome after treatment when compared to those without such mutations.
Discussion
The outcome of r/r MB-NHL in children is very poor [6, 8, 24, 25]. Although most patients improve after treatment with CAR-T cells, some patients still experience relapse and rapid progression [26]. We explored a critical clinical question: are there molecular markers that predict the outcome of CAR-T cell therapy in r/r MB-NHL pediatric patients? We analyzed the molecular variation characteristics of MB-NHL in 89 children. To the best of our knowledge, this is the first study to find that ARID1A mutations are associated with poor outcome after CAR-T cell therapy in children with r/r MB-NHL. At the same time, a significant finding was that co-mutation of ARID1A and TP53 in Chinese children with r/r MB-NHL is associated with insensitivity to chemotherapy and CAR-T cell treatment.
ARID1A is one of the most commonly mutated genes in cancers [27,28,29]. Expressing a subunit of the SWI/SNF chromatin remodeler, ARID1A impacts transcription initiation and elongation [30, 31], participates in control of the PI3K/AKT/mTOR pathway and is associated with EZH2 methyltransferase activity, steroid receptor modulation and regulation of p53 targets [32,33,34]. Studies have shown that ARID1A has a crucial role in regulating gene expression that drives oncogenesis or tumor suppression and that deletion of ARID1A promotes tumor progression. In this study, the incidence of ARID1A was higher in r/r MB-NHL patients than in IR patients (35% vs. 7%), indicating that ARID1A mutations are enriched in resistant disease and that these patients might be insensitive to initial chemotherapy. A study in ovarian cancer showed that ARID1A alterations may also mediate resistance to platinum chemotherapy and estrogen receptor degraders/modulators [35], which further supports our findings that ARID1A deficiency may render patients insensitive to initial chemotherapy and be associated with relapse. Moreover, consistent with other studies, most of the ARID1A mutations we detected are classified as loss-of-function mutations, which were dispersed throughout the coding sequence [36]. Most of them are truncating or frameshift mutations. These types may lead to disruption of protein functional domains or mediate mRNA degradation, thus disrupting ARID1A gene function [37, 38] and leading to tumor cell progression and patient recurrence.
CAR-T cell therapy is a good option for pediatric patients with r/r MB-NHL [9]; however, patients with ARID1A mutations have lower rates of response and survival after CAR-T cell therapy. CAR-T cell exhaustion is partly attributed to prolonged exposure to the immunosuppressive microenvironment, upregulation of inhibitory receptors, and persistent CAR stimulation by antigen [39, 40]. There is evidence that ARID1A can modulate the tumor immune microenvironment, which underlies its correlation with sensitivity to immunotherapy [40,41,42]. Julia A. Belk et al. demonstrated through gene editing that ARID1A improves T-cell persistence and that anti-ARID1A deficiency promotes mutability and potentiates therapeutic antitumor immunity, unleashing tumor immunity in vivo [43]; however, deletion of ARID1A gene function and decreased T-cell persistence may be barriers to immune checkpoint blockade and the effectiveness of CAR-T cell immunotherapy [44]. In addition, ARID1A mutation is associated with increased expression of PD-L1, which reduces the level of antitumor immune response and may promote immune escape of tumor cells [45, 46]. ARID1A is also reportedly closely related to DNA mismatch repair and microsatellite instability [41], which is a possible factor for poor immunotherapy effects caused by ARID1A mutation. These conclusions support our view that ARID1A mutations are associated with poorer clinical benefit in patients treated with CAR-T cells. Furthermore, ARID1A alterations may be a risk factor for insensitivity to chemotherapy or CAR-T cell therapy, and patients should be monitored and regularly followed up.
The negative prognostic impact of TP53 mutation and its association with drug resistance is well known in many malignancies [47], and some studies have shown that TP53 aberrations are valuable prognostic markers in CD19-CAR-T cell recipients [18]. Nonetheless, there have been few studies on children with B-NHL. In our study, children with TP53 mutations showed a trend of adverse outcomes after CAR-T cell therapy, but without reaching a significant level; hence, further research is needed. Multiple studies in solid tumors have demonstrated an inverse relationship between TP53 and ARID1A mutations and even found ARID1A and TP53 mutual exclusivity in ovarian clear cell and uterine endometrioid carcinomas [34, 48]. Remarkably, we found significant co-mutation of ARID1A and TP53 in r/r MB-NHL that was associated with CAR-T cell insensitivity. ARID1A has been shown to interact with ligand-bound nuclear hormone receptors and TP53 through its C-terminal domain and to stimulate the transcriptional activity of these transcription factors [34, 49]. A new study using genetic engineering has shown that ARID1A loss probably affects multiple aspects of TP53-regulated chromatin and promotes squamous differentiation and acquisition of invasive properties [50]. These may be the causes of the poor prognosis in patients with co-mutation of ARID1A and TP53, and their molecular mechanisms need to be further studied. In recent years, it has been shown that a high VAF load is associated with poor outcome in patients with hematologic tumors [51] and we also report similar findings.
We have identified molecular abnormalities that may affect the outcome of CAR-T cell therapy in r/r MB-NHL patients, and there is an urgent need to find new solutions. In recent years, with the development of drugs and clinical research, target drugs related to TP53 or ARID1A have been studied in the clinic and laboratory, including combined epigenetic inhibitors to form combined lethal targeted therapies and immune checkpoint inhibitor treatment [52, 53]. CAR-T cell therapy combined with immunosuppressants or cytokine inhibitors has been shown to enhance antitumor efficacy in the treatment of hematologic tumors [54]. In addition, multitarget CAR-T cell combination therapy or radiotherapy combined with CAR-T cell therapy may be more effective than CAR-T cell therapy alone. Our study provides a new clinical basis for further work. In the future, we will continue to pay attention to the follow-up treatment and outcome of lymphoma patients.
This study has several limitations. First, sequencing of tumor samples was driven by clinical decision-making, potentially leading to selection bias. However, we note that population features and outcomes were similar between patients who underwent sequencing and those who did not. Finally, to our knowledge, although this is the first analysis evaluating the role of ARID1A in children with r/r MB-NHL treated with CAR-T cells, the sample size was limited. Validation using larger cohorts and prospective trials are warranted to guide CAR-T cell product selection.
Conclusion
In summary, our study analyzed the genetic features and treatment outcomes of 89 children with MB-NHL, and ARID1A mutations are common in pediatric MB-NHL. We demonstrated that children with MB-NHL harboring ARID1A or TP53 and ARID1A co-mutation were insensitive to initial conventional chemotherapy and subsequent CAR-T treatment and were associated with disease progression or relapse. Our data suggest that ARID1A and TP53 mutation status should be considered when prognostic factors are evaluated before CAR-T treatment, and this finding would help clinicians customize tailored treatments for their patients.
Data Availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- MB-NHL:
-
Mature B-cell non-Hodgkin lymphoma
- IR:
-
Initial remission
- r/r:
-
Refractory or relapsed
- CNCL:
-
China Net Childhood Lymphoma
- CAR-T cell:
-
Chimeric antigen receptor T cell
- EFS:
-
Progression-free survival
- OS:
-
Overall survival
- DFS:
-
Disease-free survival
- CR:
-
Complete response
- NR:
-
Partial response
- PR:
-
No response
- PD:
-
Progressive disease
- SNVs:
-
Single-nucleotide variants
- InDels:
-
Short insertions and deletions
- t-NGS:
-
Targeted next-generation sequencing
- PCR:
-
Polymerase chain reaction
- VAF:
-
Variant allele frequency
- BL:
-
Burkitt Lymphoma
- HGBL:
-
High-grade B cell Lymphoma
- DLBCL:
-
Diffuse Large B Cell Lymphoma
- CNS:
-
Central nervous system
- ORR:
-
Overall response rate (ORR)
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Acknowledgements
The authors thank all of the patients who participated in the study and their families, friends, and caregivers for their support, and the members of clinical centers of the China Net Childhood Lymphoma (CNCL) for their support in carrying out this work. The authors would also like to thank the members of the Molecular Diagnostics Laboratory of Beijing GoBroad Boren Hospital for the targeted deep sequencing and data analysis of the samples.
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QZ, YZ contributed to the conception, designed the study and revised the first draft; Y Li, Y Liu wrote the first draft of the manuscript, and contributed to data acquisition, analysis and interpretation; KY contributed to data analysis and interpretation; LJ, JY, SH, YL, BH, RL, WL and AL contributed to data acquisition. All authors have read and approved the final manuscript.
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This study was approved by the institutional review board of Beijing GoBroad Boren Hospital, in accordance with the Declaration of Helsinki (Approval number: 20210312-KS-001Y and 20180114-PJ-001).
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Li, Y., Liu, Y., Yang, K. et al. Impact of ARID1A and TP53 mutations in pediatric refractory or relapsed mature B-Cell lymphoma treated with CAR-T cell therapy. Cancer Cell Int 23, 281 (2023). https://doi.org/10.1186/s12935-023-03122-2
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DOI: https://doi.org/10.1186/s12935-023-03122-2