A substantial number of survivors of childhood acute lymphoblastic leukemia suffer from treatment-related late adverse effects including neurocognitive impairment. While multiple studies have ...described neurocognitive outcomes in childhood acute lymphoblastic leukemia (ALL) survivors, relatively few have investigated their association with individual genetic constitution.
To further address this issue, genetic variants located in 99 genes relevant to the effects of anticancer drugs and in 360 genes implicated in nervous system function and predicted to affect protein function, were pooled from whole exome sequencing data of childhood ALL survivors (PETALE cohort) and analyzed for an association with neurocognitive complications, as well as with anxiety and depression. Variants that sustained correction for multiple testing were genotyped in entire cohort (n = 236) and analyzed with same outcomes.
Common variants in MTR, PPARA, ABCC3, CALML5, CACNB2 and PCDHB10 genes were associated with deficits in neurocognitive tests performance, whereas a variant in SLCO1B1 and EPHA5 genes was associated with anxiety and depression. Majority of associations were modulated by intensity of treatment. Associated variants were further analyzed in an independent SJLIFE cohort of 545 ALL survivors. Two variants, rs1805087 in methionine synthase, MTR and rs58225473 in voltage-dependent calcium channel protein encoding gene, CACNB2 are of particular interest, since associations of borderline significance were found in replication cohort and remain significant in combined discovery and replication groups (OR = 1.5, 95% CI, 1-2.3; p = 0.04 and; OR = 3.7, 95% CI, 1.25-11; p = 0.01, respectively). Variant rs4149056 in SLCO1B1 gene also deserves further attention since previously shown to affect methotrexate clearance and short-term toxicity in ALL patients.
Current findings can help understanding of the influence of genetic component on long-term neurocognitive impairment. Further studies are needed to confirm whether identified variants may be useful in identifying survivors at increased risk of these complications.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
The progress of treatments of childhood acute lymphoblastic leukemia (ALL) has made it possible to reach a survival rate superior to 80%. However, the treatments lead to several long-term adverse ...effects, including cardiac toxicity. Although studies have reported associations between genetic variants and cardiorespiratory fitness, none has been performed on childhood ALL survivors.
We performed whole-exome sequencing in 239 childhood ALL survivors from the PETALE cohort. Germline variants (both common and rare) in selected set of genes (N = 238) were analyzed for an association with cardiorespiratory fitness.
Our results showed that the common variant in the TTN gene was significantly associated with a low cardiorespiratory fitness level (p = 0.0005) and that the LEPR, IGFBPI and ENO3 genes were significantly associated with a low cardiorespiratory fitness level in female survivors (p ≤ 0.002). Also, we detected an association between the low cardiorespiratory fitness level in participants that were stratified to the "high risk" prognostic group and functionally predicted rare variants in the SLC22A16 gene (p = 0.001). Positive associations between cardiorespiratory fitness level and trainability genes were mainly observed in females.
For the first time, we observed that low cardiorespiratory fitness in childhood ALL survivors can be associated with variants in genes related to subjects' trainability. These findings could allow better childhood ALL patient follow-up tailored to their genetic profile and cardiorespiratory fitness, which could help reduce at least some of the burden of long-term adverse effects of treatments.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
The most frequent complication of allogeneic hematopoietic stem cell transplantation is acute Graft versus Host Disease (aGVHD). Proliferation and differentiation of donor T cells initiate ...inflammatory response affecting the skin, liver, and gastrointestinal tract. Besides recipient-donor HLA disparities, disease type, and the conditioning regimen, variability in the non-HLA genotype have an impact on aGVHD onset, and genetic variability of key cytokines and chemokines was associated with increased risk of aGVHD. To get further insight into the recipient genetic component of aGVHD grades 2-4 in pediatric patients, we performed an exome-wide association study in a discovery cohort (n = 87). Nine loci sustained correction for multiple testing and were analyzed in a validation group (n = 168). Significant associations were replicated for ERC1 rs1046473, PLEK rs3816281, NOP9 rs2332320 and SPRED1 rs11634702 variants through the interaction with non-genetic factors. The ERC1 variant was significant among patients that received the transplant from HLA-matched related individuals (p = 0.03), bone marrow stem cells recipients (p = 0.007), and serotherapy-negative patients (p = 0.004). NOP9, PLEK, and SPRED1 effects were modulated by stem cell source, and serotherapy (p < 0.05). Furthermore, ERC1 and PLEK SNPs correlated with aGVHD 3-4 independently of non-genetic covariates (p = 0.02 and p = 0.003). This study provides additional insight into the genetic component of moderate to severe aGVHD.
Anthracycline-induced cardiotoxicity (AIC) is a serious and common side effect of anthracycline therapy. Identification of genes and genetic variants associated with AIC risk has clinical potential ...as a cardiotoxicity predictive tool and to allow the development of personalized therapies. In this review, we provide an overview of the function of known AIC genes identified by association studies and categorize them based on their mechanistic implication in AIC. We also discuss the importance of functional validation of AIC-associated variants in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) to advance the implementation of genetic predictive biomarkers. Finally, we review how patient-specific hiPSC-CMs can be used to identify novel patient-relevant functional targets and for the discovery of cardioprotectant drugs to prevent AIC. Implementation of functional validation and use of hiPSC-CMs for drug discovery will identify the next generation of highly effective and personalized cardioprotectants and accelerate the inclusion of approved AIC biomarkers into clinical practice.
Cardiovascular diseases are the main cause of treatment-related morbidity and mortality in childhood cancer patients. Anthracyclines, one of the most common chemotherapeutic agents in treatment ...regimens, are implicated in chemotherapy-induced cardiotoxicity.
This review describes the pharmacogenomic markers related to anthracycline-induced cardiotoxicity affecting childhood cancer patients. We also included a brief overview of the applicability of reported findings to the well-established PETALE cohort of childhood acute lymphoblastic leukemia survivors of the Sainte-Justine University Health Center (Canada).
The wide variation in interindividual susceptibility to anthracycline-induced cardiotoxicity, along with a multitude of genetic variants detected through association studies, suggests that genetic contributions could be essential for the design of new individualized preventive approaches.
An increased risk of neurocognitive deficits, anxiety, and depression has been reported in childhood cancer survivors.
We analyzed associations of neurocognitive deficits, as well as anxiety and ...depression, with common and rare genetic variants derived from whole-exome sequencing data of acute lymphoblastic leukemia (ALL) survivors from the PETALE cohort. In addition, significant associations were assessed using stratified and multivariable analyses. Next, top-ranking common associations were analyzed in an independent SJLIFE replication cohort of ALL survivors.
Significant associations were identified in the entire discovery cohort (N = 229) between the AK8 gene and changes in neurocognitive function, whereas PTPRZ1, MUC16, TNRC6C-AS1 were associated with anxiety. Following stratification according to sex, the ZNF382 gene was linked to a neurocognitive deficit in males, whereas APOL2 and C6orf165 were associated with anxiety and EXO5 with depression. Following stratification according to prognostic risk groups, the modulatory effect of rare variants on depression was additionally found in the CYP2W1 and PCMTD1 genes. In the replication SJLIFE cohort (N = 688), the male-specific association in the ZNF382 gene was not significant; however, a P value<0.05 was observed when the entire SJLIFE cohort was analyzed. ZNF382 was significant in males in the combined cohorts as shown by meta-analyses as well as the depression-associated gene EXO5.
Further research is needed to confirm whether the current findings, along with other known risk factors, may be valuable in identifying patients at increased risk of these long-term complications.
Our results suggest that specific genes may be related to increased neuropsychological consequences.
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Background: Cancer-therapy-induced cardiomyopathy (CCM) is the leading noncancer cause of mortality among long-term survivors of childhood cancer, the prevalence of which increases with age. ...Early identification of survivors at risk provides opportunities for targeted prevention strategies. Here, we developed and validated a clinically applicable CCM prediction model based on survivor characteristics, treatment exposures and inherited genetic variation among long-term survivors of childhood cancer. Methods: Long-term survivors from SJLIFE (training cohort; n = 3,350; median age 34 years, range 8-72 years) and CCSS (validation cohort; n = 7,008; median age 36 years, range 11-64 years) were assessed by the five different general population polygenic risk scores (multiPRS) for dilated cardiomyopathy, hypertrophic cardiomyopathy, heart failure, ejection fraction and left ventricular end systolic volume. Multivariable logistic regression was used to predict 15-year risk of the CCM (defined as CTCAE grade ≥3 cardiomyopathy requiring heart failure medications or heart transplantation or leading to death). Model performance was assessed by the area under the receiver operating characteristic curve (AUC). Results: CCM was clinically identified in 150 (4.5%) SJLIFE and self-reported in 156 (2.1%) CCSS survivors, respectively. AUC of clinical models with attained age, sex, age at primary cancer diagnosis, cumulative anthracycline dose, mean heart radiation dose (heart RT), and genetic ancestry was 0.81 (95% CI, 0.78-0.85) in SJLIFE and 0.78 (95% CI, 0.74-0.81) in CCSS. Inclusion of cardiovascular risk factors (hypertension, dyslipidemia, and diabetes) significantly increased AUC to 0.83 (95% CI, 0.80-0.87; P= 0.011; SJLIFE) and 0.84 (95% CI, 0.80-0.87; P< 0.001; CCSS). The addition of the multiPRS further provided significant but modest increases in AUC in SJLIFE (0.84; 95% CI, 0.81-0.87; P= 0.022) and CCSS (0.85; 95% CI, 0.81-0.88; P= 0.031). In low-risk survivors (exposed to < 100 mg/m
2
anthracyclines and < 15 Gray heart RT), we observed a possibly larger magnitude AUC increase after adding multiPRS, 0.73 (95% CI, 0.65-0.82) to 0.76 (95% CI, 0.68-0.83; P= 0.11) in SJLIFE and 0.77 (95% CI, 0.65-0.90) to 0.82 (95% CI, 0.69-0.94; P= 0.073) in CCSS. Conclusions: Inherited polygenic factors contributed significantly to improve CCM prediction over available clinical risk factors and may be of benefit to low-risk survivors for whom routine cardiac surveillance is not currently recommended.
12088
Background: Treatment of childhood cancer using doxorubicin is associated with a well-established dose-related risk of cardiomyopathy, which can lead to heart failure and affects ~7-10% of ...exposed children and adolescents. Here, we identified a genetic variant associated with risk of doxorubicin-induced cardiomyopathy (diCM) in survivors of childhood cancer. Methods: A genome-wide association study using common variants (MAF≥5%; whole-genome sequencing data) was performed among 993 SJLIFE survivors of European ancestry (median age, 36.6 years; range, 8.7-62.2 years) treated with doxorubicin only (210 with diCM; defined as CTCAE grade ≥2 clinically assessed cardiomyopathy). Replication analyses were performed separately among 1,430 CCSS survivors of European ancestry (median age, 35.4 years; range, 15.8-60.7 years) and 159 SJLIFE survivors of African ancestry (median age, 32.6 years; range, 8.9-61.1 years) exposed to doxorubicin only. Analyses were adjusted for age at primary cancer diagnosis, sex, doxorubicin dose, age at last contact and top five principal components. Results: We identified a genome-wide significant association between a novel locus near HS3ST4 and diCM risk in SJLIFE survivors of European ancestry (rs112474856; OR = 2.78; P= 3.3×10
-8
). This association replicated in CCSS survivors of European ancestry (OR = 1.74, P= 0.036) but had an opposite effect among SJLIFE survivors of African ancestry (OR = 0.34, P= 0.028). SNP rs112474856 did not show significant association with diCM risk in two independent datasets including survivors of European ancestry in SJLIFE (OR = 1.20; P= 0.71) and CCSS (OR = 1.02; P= 0.98) who were not exposed to doxorubicin but were treated with daunorubicin or chest radiotherapy, suggesting doxorubicin specificity. No association was observed between rs112474856 and risks of cardiomyopathy (OR = 1.00; P= 0.88) or heart failure (OR = 1.00; P= 0.59) in 361,194 UK Biobank participants from the general population. HS3ST4 was significantly upregulated ( P= 4.7×10
-6
) in response to doxorubicin treatment in human induced pluripotent stem-cell-derived cardiomyocytes from patients with diCM. HS3ST4 encodes heparan sulfate, the latter was recently linked to immune activation, cardiac fibrosis, and heart failure. Conclusions: Leveraging the two largest cohorts of childhood cancer survivors in North America, we identified and replicated a novel locus for diCM which was associated with increased risk in survivors of European ancestry but decreased in their African counterpart.
Abstract
Purpose: Cancer survivors’ exposure to chemotherapeutic agents leads to multiple long-term side effects with a decrease in their cardiorespiratory fitness. The first aim was to determine ...whether cardiorespiratory fitness and physical activity levels were lower among survivors than healthy Canadians, while the second aim was to report associations between genetic variants and cardiorespiratory fitness in survivors.
Methods: Cardiorespiratory fitness (VO2peak) and moderate to vigorous physical activity (MVPA) were compared between childhood ALL survivors (N=221) and healthy Canadians (N=825). We performed whole-exome sequencing in survivors. Germline variants (both common and rare) in a selected set of trainability genes were analyzed for an association with cardiorespiratory fitness.
Results: Survivors’ VO2 peak was found to be 22% lower than healthy Canadians. The cardiorespiratory fitness level was different between survivors and healthy Canadians despite a clinically equivalent level of MVPA. Positive associations between the cardiorespiratory fitness level and trainability genes (TTN, LEPR, IGFBPI, and ENO3 genes) were reported, especially in female survivors with a low cardiorespiratory fitness level.
Conclusion: The cardiorespiratory fitness was significantly lower in survivors, which can be associated with variants in genes related to subjects’ trainability. At this time, it appears that more physical activity would be beneficial to survivors to achieve the same benefits as the healthy population. However, the optimal amount of physical activity needed to reach these benefits is not yet clear. The survivors’ responder or nonresponder status several years after the end of the treatments is unknown. This study has important implications for the field of exercise in oncology.
Citation Format: Maxime Caru, Kateryna Petrykey, Mariia Samoilenko, Simon Drouin, Valérie Lemay, Laurence Kern, Lucia Romo, Patrick Beaulieu, Pascal St-Onge, Laurence Bertout, Geneviéve Lefebvre, Gregor Andelfinger, Maja Krajinovic, Caroline Laverdière, Daniel Sinnett, Daniel Curnier. The need to improve exercise prescriptions to support care in pediatric oncology abstract. In: Proceedings of the AACR Special Conference on the Advances in Pediatric Cancer Research; 2019 Sep 17-20; Montreal, QC, Canada. Philadelphia (PA): AACR; Cancer Res 2020;80(14 Suppl):Abstract nr B62.
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