1
|
Li W, Mo J, Yang Z, Zhao Z, Mei S. Risk factors associated with high-dose methotrexate induced toxicities. Expert Opin Drug Metab Toxicol 2024; 20:263-274. [PMID: 38501267 DOI: 10.1080/17425255.2024.2332366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024]
Abstract
INTRODUCTION High-dose methotrexate (HDMTX) therapy poses challenges in various neoplasms due to individualized pharmacokinetics and associated adverse effects. Our purpose is to identify early risk factors associated with HDMTX-induced toxicities, paving the way for personalized treatment. AREAS COVERED A systematic review of PubMed and Cochrane databases was conducted for articles from inception to July 2023. Eligible studies included reviews, clinical trials, and real-world analyses. Irrelevant studies were excluded, and manual searches and citation reviews were performed. Factors such as MTX exposure, drug interactions, demographics, serum albumin, urine pH, serum calcium, and genetic polymorphisms affecting MTX transport (e.g. SLCO1B1), intracellular folate metabolism (MTHFR), cell development (ARID5B), metabolic pathways (UGT1A1, PNPLA3), as well as epigenetics were identified. EXPERT OPINION This comprehensive review aids researchers and clinicians in early identification of HDMTX toxicity risk factors. By understanding the multifaceted risk factors associated with hematologic malignancies, personalized treatment approaches can be tailored to optimize therapeutic outcomes.
Collapse
Affiliation(s)
- Wenshu Li
- Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing, P. R. China
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| | - Jiayi Mo
- Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing, P. R. China
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| | - Zhilin Yang
- Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing, P. R. China
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| | - Zhigang Zhao
- Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing, P. R. China
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| | - Shenghui Mei
- Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing, P. R. China
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| |
Collapse
|
2
|
Shendy K, Abdelkawy K, Ali AA, Belal F, Abdelhakiem M, Magdy G, Anber N, Elbarbry F. The effects of genetic polymorphism on toxicity and pharmacokinetics of methotrexate in Egyptian adult patients with leukaemia or lymphoma. Xenobiotica 2024; 54:95-105. [PMID: 38381003 DOI: 10.1080/00498254.2024.2320778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 02/15/2024] [Indexed: 02/22/2024]
Abstract
Polymorphisms in genes coding folate-metabolising enzymes might alter the pharmacokinetics and sensitivity for methotrexate "MTX".The aim of the study aimed to investigate the influence of MTHFR C677T, DHFR19 Ins/del, GGH -401 C > T, and MTR A2756G polymorphisms on MTX toxicity and pharmacokinetics in Egyptian patients with Acute lymphoblastic leukaemia (ALL) or Non-Hodgkin lymphoma (NHL).Fifty adult Egyptian patients with ALL and NHL, treated with high dose MTX, were prospectively enrolled in the study. Clinical and biochemical data was collected objectively from medical records after each cycle of MTX. Plasma concentrations of MTX were measured after 72 h of initiation of infusion. Genotyping was done with a PCR-ARMS and PCR-RFLP assays.The MTHFR C677T T variants significantly increased the risk of leukopoenia, whereas the genotype MTHFR 677 C > T TT significantly associated with lymphocytopenia, thrombocytopenia, and anaemia. The genotype GGH-401 TT was significantly correlated with anaemia. Plasma MTX level was significantly higher in patients with MTR A2756G G variants.MTHFR polymorphism played the main role in MTX toxicities. The pharmacokinetics of MTX was affected by MTR polymorphism. GGH mutation was mainly concerned with anaemia. Pharmacogenetic testing are recommended to optimise MTX therapy.
Collapse
Affiliation(s)
- Khloud Shendy
- Clinical Pharmacy Department, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Khaled Abdelkawy
- Clinical Pharmacy Department, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Ahmed Amin Ali
- Clinical Pharmacy Department, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry Department, Mansoura University, Mansoura, Egypt
| | | | - Galal Magdy
- Pharmaceutical Analytical Chemistry Department, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Nahla Anber
- Department of Medicine, Mansoura University Hospital, Mansoura, Egypt
| | | |
Collapse
|
3
|
Folyl polyglutamate synthethase (FPGS) gene polymorphisms may influence methotrexate adverse events in South Indian Tamil Rheumatoid Arthritis patients. THE PHARMACOGENOMICS JOURNAL 2019; 20:342-349. [DOI: 10.1038/s41397-019-0097-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 09/16/2019] [Accepted: 10/01/2019] [Indexed: 11/08/2022]
|
4
|
Gervasini G, Mota-Zamorano S. Clinical Implications of Methotrexate Pharmacogenetics in Childhood Acute Lymphoblastic Leukaemia. Curr Drug Metab 2019; 20:313-330. [DOI: 10.2174/1389200220666190130161758] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/11/2019] [Accepted: 01/19/2019] [Indexed: 12/14/2022]
Abstract
Background:In the past two decades, a great body of research has been published regarding the effects of genetic polymorphisms on methotrexate (MTX)-induced toxicity and efficacy. Of particular interest is the role of this compound in childhood acute lymphoblastic leukaemia (ALL), where it is a pivotal drug in the different treatment protocols, both at low and high doses. MTX acts on a variety of target enzymes in the folates cycle, as well as being transported out and into of the cell by several transmembrane proteins.Methods:We undertook a structured search of bibliographic databases for peer-reviewed research literature using a focused review question.Results:This review has intended to summarize the current knowledge concerning the clinical impact of polymorphisms in enzymes and transporters involved in MTX disposition and mechanism of action on paediatric patients with ALL.Conclusion:In this work, we describe why, in spite of the significant research efforts, pharmacogenetics findings in this setting have not yet found their way into routine clinical practice.
Collapse
Affiliation(s)
- Guillermo Gervasini
- Department of Medical & Surgical Therapeutics, Medical School, University of Extremadura, Av. Elvas s/n 06006, Badajoz, Spain
| | - Sonia Mota-Zamorano
- Department of Medical & Surgical Therapeutics, Medical School, University of Extremadura, Av. Elvas s/n 06006, Badajoz, Spain
| |
Collapse
|
5
|
Genetic markers in methotrexate treatments. THE PHARMACOGENOMICS JOURNAL 2018; 18:689-703. [DOI: 10.1038/s41397-018-0047-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 07/06/2018] [Accepted: 08/10/2018] [Indexed: 12/20/2022]
|
6
|
Kodidela S, Pradhan SC, Dubashi B, Basu D. Interethnic Differences in Single and Haplotype Structures of Folylpolyglutamate Synthase and Gamma-glutamyl Hydrolase Variants and Their Influence on Disease Susceptibility to Acute Lymphoblastic Leukemia in the Indian Population: An Exploratory Study. Indian J Med Paediatr Oncol 2018. [DOI: 10.4103/ijmpo.ijmpo_32_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
AbstractAim: We aim to establish the genotype and haplotype frequencies of folylpolyglutamate synthase (FPGS rs10106 and rs1544105) and gamma-glutamyl hydrolase (GGH rs3758149 and rs11545078) variants in the South Indian population (SI) and to study the association of these variants with susceptibility to acute lymphoblastic leukemia (ALL). We also aim to compare the genotype and haplotype frequencies of studied variants with those of superpopulations from the 1000 Genomes Project collected in phase-3 and other published studies in the literature. Materials and Methods: A total of 220 unrelated healthy volunteers and 151 patients with ALL of both sexes were recruited for the study. Extracted DNA was subjected to genotyping by allelic discrimination using quantitative real-time-polymerase chain reaction. Genotype details of the studied variants in other ethnicities were obtained from 1000 genomes project Phase 3 data. Haploview software was used to construct haplotypes. Results:: In our study, the frequencies of FPGS rs1006'G' and rs1544105'A' alleles were found to be 37% and 37.2%, respectively, and the frequencies of GGH rs3758149'T' and GGH rs11545078'T' alleles were found to be 29.8% and 16.7%, respectively. Among the studied variants, FPGS rs1544105'AA' genotype carriers were found to be susceptible to the risk of ALL (odds ratio: 2.16; 95% confidence interval [CI]: 1.15–4.07; P = 0.02). Haplotype structures of FPGS and GGH variants in SI population were significantly different from other ethnicities (P < 0.05), except the South Asian superpopulation. Conclusion: FPGS rs1544105'AA' genotype was found to influence the risk for ALL. Intra and interethnic differences exist in the distribution of studied variants. Therefore, the impact of each variant on the susceptibility and outcome of diseases may differ between populations.
Collapse
Affiliation(s)
- Sunitha Kodidela
- Department of Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Suresh Chandra Pradhan
- Department of Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Biswajit Dubashi
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Debdatta Basu
- Department of Pathology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| |
Collapse
|
7
|
Meng HY, Luo ZH, Hu B, Jin WL, Yan CK, Li ZB, Xue YY, Liu Y, Luo YE, Xu LQ, Yang H. SNPs affecting the clinical outcomes of regularly used immunosuppressants. Pharmacogenomics 2018. [PMID: 29517418 DOI: 10.2217/pgs-2017-0182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Recent studies have suggested that genomic diversity may play a key role in different clinical outcomes, and the importance of SNPs is becoming increasingly clear. In this article, we summarize the bioactivity of SNPs that may affect the sensitivity to or possibility of drug reactions that occur among the signaling pathways of regularly used immunosuppressants, such as glucocorticoids, azathioprine, tacrolimus, mycophenolate mofetil, cyclophosphamide and methotrexate. The development of bioinformatics, including machine learning models, has enabled prediction of the proper immunosuppressant dosage with minimal adverse drug reactions for patients after organ transplantation or for those with autoimmune diseases. This article provides a theoretical basis for the personalized use of immunosuppressants in the future.
Collapse
Affiliation(s)
- Huan-Yu Meng
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Zhao-Hui Luo
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Bo Hu
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Wan-Lin Jin
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Cheng-Kai Yan
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Zhi-Bin Li
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Yuan-Yuan Xue
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Yu Liu
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Yi-En Luo
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Li-Qun Xu
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| | - Huan Yang
- Department of Neurology, Xiangya Hospital of Central South University, Changsha, PR China
| |
Collapse
|
8
|
Dihydrofolate Reductase Genetic Polymorphisms Affect Methotrexate Dose Requirements in Pediatric Patients With Acute Lymphoblastic Leukemia on Maintenance Therapy. J Pediatr Hematol Oncol 2017; 39:589-595. [PMID: 28719513 DOI: 10.1097/mph.0000000000000908] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We have aimed to determine the effect of polymorphisms in regulatory regions of the DHFR gene in relation to methotrexate (MTX) dose adjustments and drug-induced toxicity in children on maintenance therapy for acute lymphoblastic leukemia (ALL). In total, 41 children diagnosed with ALL were screened for 3 tag-single nucleotide polymorphisms in the DHFR promoter (C-1610G, C-680G/T, A-317G) and an intronic 19-bp insertion/deletion. Genotypes were analyzed in relation to dose requirements and toxicity. The percentage of MTX dose administered (with respect to protocol-recommended values) was affected by DHFR polymorphisms. Carriers of the -680AA genotype displayed a median percentage of 44.08 (interquartile range=34.69), compared with 77.98 (interquartile range=33.90) for CC and CA carriers (P=0.01). The number of counts within white blood cell therapeutic range (2.0 to 3.0×10/L) was higher for -680AA carriers than for CC/CA carriers (P=0.003). With regard to toxicity, carriers of the -680AA genotype displayed more treatment interruptions than CC/CG carriers (P=0.03), as well as more episodes of severe neutropenia (P=0.04) and higher number of blood counts with elevated levels (>400 mg/dL) of lactate dehidrogenase (P=0.04). Overall, our findings suggest that the identification of DHFR polymorphisms in the promoter region of the gene may be helpful in tailoring MTX doses for ALL pediatric patients on maintenance therapy.
Collapse
|
9
|
Kalantari A, Zaker F, Ansari S, Sharafi H, Mohammadian M. The effect of polymorphisms of gamma-glutamyl hydrolase (GGH) gene on methotrexate-induced toxicity in acute lymphoblastic leukemia. TOXIN REV 2015. [DOI: 10.3109/15569543.2015.1083033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
10
|
Chen Y, Shen Z. Gene polymorphisms in the folate metabolism and their association with MTX-related adverse events in the treatment of ALL. Tumour Biol 2015; 36:4913-21. [PMID: 26022160 DOI: 10.1007/s13277-015-3602-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Accepted: 05/20/2015] [Indexed: 01/22/2023] Open
Abstract
The antifolate drug methotrexate (MTX) is widely used in the treatment of various neoplastic diseases, including acute lymphoblastic leukemia (ALL). MTX significantly increases cure rates and improves patients' prognosis. Despite that it achieved remarkable clinical success, a large number of patients still suffer from treatment toxicities or side effects. Even to this date, chemotherapeutic regiments have not been personalized because of interindividual differences that affect MTX response, especially polymorphisms in key genes. The pharmacological pathway of MTX in cells is useful to identify gene polymorphisms that influence the process of treatment. The aim of this review was to discuss the gene polymorphisms of drug-metabolizing enzymes in the MTX pathway and their toxicities on ALL treatment.
Collapse
Affiliation(s)
- Yang Chen
- Centre of Clinical Laboratory, Anhui Provincial Hospital Affiliated of Anhui Medical University, Hefei, 230001, China
| | | |
Collapse
|
11
|
γ-Glutamyl hydrolase modulation significantly influences global and gene-specific DNA methylation and gene expression in human colon and breast cancer cells. GENES AND NUTRITION 2014; 10:444. [PMID: 25502219 DOI: 10.1007/s12263-014-0444-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/17/2014] [Indexed: 10/24/2022]
Abstract
γ-Glutamyl hydrolase (GGH) plays an important role in folate homeostasis by catalyzing hydrolysis of polyglutamylated folate into monoglutamates. Polyglutamylated folates are better substrates for several enzymes involved in the generation of S-adenosylmethionine, the primary methyl group donor, and hence, GGH modulation may affect DNA methylation. DNA methylation is an important epigenetic determinant in gene expression, in the maintenance of DNA integrity and stability, and in chromatin modifications, and aberrant or dysregulation of DNA methylation has been mechanistically linked to the development of human diseases including cancer. Using a recently developed in vitro model of GGH modulation in HCT116 colon and MDA-MB-435 breast cancer cells, we investigated whether GGH modulation would affect global and gene-specific DNA methylation and whether these alterations were associated with significant gene expression changes. In both cell lines, GGH overexpression decreased global DNA methylation and DNA methyltransferase (DNMT) activity, while GGH inhibition increased global DNA methylation and DNMT activity. Epigenomic and gene expression analyses revealed that GGH modulation influenced CpG promoter DNA methylation and gene expression involved in important biological pathways including cell cycle, cellular development, and cellular growth and proliferation. Some of the observed altered gene expression appeared to be regulated by changes in CpG promoter DNA methylation. Our data suggest that the GGH modulation-induced changes in total intracellular folate concentrations and content of long-chain folylpolyglutamates are associated with functionally significant DNA methylation alterations in several important biological pathways.
Collapse
|
12
|
Wang SM, Sun LL, Zeng WX, Wu WS, Zhang GL. Influence of genetic polymorphisms of FPGS, GGH, and MTHFR on serum methotrexate levels in Chinese children with acute lymphoblastic leukemia. Cancer Chemother Pharmacol 2014; 74:283-9. [PMID: 24908438 DOI: 10.1007/s00280-014-2507-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 05/28/2014] [Indexed: 12/17/2022]
Abstract
PURPOSE To investigate the correlation between common genetic polymorphisms of folylpolyglutamate synthase (FPGS), gamma-glutamyl hydrolase (GGH), and methylenetetrahydrofolate reductase (MTHFR) and serum levels of methotrexate (MTX) in Chinese children with acute lymphoblastic leukemia (ALL). METHODS Ninety-one children with ALL who received high-dose MTX were recruited. The polymorphisms FPGS (rs1544105 G>A), GGH (rs3758149 C>T), and MTHFR (rs1801133 C>T) were genotyped through polymerase chain reaction-restriction fragment length polymorphism analysis. Serum MTX was measured by fluorescence polarization immunoassay. The association between targeted polymorphisms and MTX concentration-to-dose (C/D) ratios was assessed, and between targeted polymorphisms and the percent of MTX above the therapeutic threshold (40 µmol/L). RESULTS The minor allele frequencies of rs1544105 G (34.1%), rs3758149 T (19.2%), and rs1801133 C (48.4%) observed in our population were significantly lower than those reported for European populations (64.2, 30.8, and 69.0%, respectively). The association between the GGH rs3758149 polymorphism and MTX C/D was gender-specific; in girls, the MTX C/D at 24 h of GGH rs3758149 CC carriers (12.09 μmol/L per g/m(2)) was significantly lower than that of CT or TT carriers (16.80 μmol/L per g/m(2)). The percent of serum MTX above the therapeutic threshold in GGH rs3758149 CC carriers (18.3%) was significantly lower than that of CT and TT carriers (38.7%). The MTX C/D ratios at 24 h and the percent of MTX >40 µmol/L for the A-T-T (three variant alleles) haplotype were significantly higher than those for other haplotypes combined (P < 0.05). CONCLUSIONS These data indicate that FPGS rs1544105, GGH rs3758149, and MTHFR rs1801133 polymorphisms contribute to the variability of MTX pharmacokinetics, and their genotyping may be useful to reduce toxicities associated with MTX therapy.
Collapse
Affiliation(s)
- Shu-mei Wang
- Department of Pharmacy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | | | | | | | | |
Collapse
|
13
|
γ-Glutamyl hydrolase modulation and folate influence chemosensitivity of cancer cells to 5-fluorouracil and methotrexate. Br J Cancer 2013; 109:2175-88. [PMID: 24045662 PMCID: PMC3798974 DOI: 10.1038/bjc.2013.579] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 08/27/2013] [Accepted: 08/28/2013] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND γ-Glutamyl hydrolase (GGH) regulates intracellular folate and antifolates for optimal nucleotide biosynthesis and antifolate-induced cytotoxicity, respectively. The modulation of GGH may therefore affect chemosensitivity of cancer cells, and exogenous folate levels may further modify this effect. METHODS We generated a novel model of GGH modulation in human HCT116 and MDA-MB-435 cancer cells and investigated the effect of GGH modulation on chemosensitivity to 5-fluorouracil (5FU) and methotrexate (MTX) at different folate concentrations in vitro and in vivo. RESULTS Overexpression of GGH significantly decreased chemosensitivity of MDA-MB-435 cells to 5FU and MTX at all folate concentrations as expected. In contrast, in HCT116 cells this predicted effect was observed only at very high folate concentration, and as the folate concentration decreased this effect became null or paradoxically increased. This in vitro observation was confirmed in vivo. Inhibition of GGH significantly increased chemosensitivity of both cancer cells to 5FU at all folate concentrations. Unexpectedly, GGH inhibition significantly decreased chemosensitivity of both cancer cells to MTX at all folate concentrations. In both GGH modulation systems and cell lines, the magnitude of chemosensitivity effect incrementally increased as folate concentration increased. CONCLUSION Modulation of GGH affects chemosensitivity of cancer cells to 5FU and MTX, and exogenous folate levels can further modify the effects.
Collapse
|