scholarly journals Large-scale nuclear remodeling and transcriptional deregulation occur on both derivative chromosomes after Mantle Cell Lymphoma chromosomal translocation

2019 ◽  
Author(s):  
Fatimata Bintou Sall ◽  
Andrei Pichugin ◽  
Olga Iarovaia ◽  
Ana Barat ◽  
Tatyana Tsfasman ◽  
...  

ABSTRACTRecurrent chromosomal translocations are found in many blood and solid cancers. Balanced translocations, frequent in lymphoid malignancies, lead to the formation of two aberrant derivative (der) chromosomes. This event often leads to overexpression of an oncogene. In many cases, the expression of an oncogene is not enough to produce a malignant phenotype; however, most part of the studies focus on the events involving the chromosome where the oncogene is located, but rarely the other der chromosome where other oncogenic alterations may potentially arise. Mantle cell lymphoma (MCL), an aggressive B-cell non-Hodgkin lymphoma, is a perfect example of this. In 85% of the cases, it is characterized by the translocation t(11;14), which leads to the overexpression of cyclin D1 (CCND1) gene which results juxtaposed to the immunoglobulin heavy chain (IGH) gene on the der14 chromosome. This feature alone is not sufficient to induce oncogenesis. Here we focused on the der11 chromosome. We demonstrated that expression of 88 genes located in a 15mb region close to the translocation breakpoint on the der11 was deregulated both in the GRANTA-519 MCL cell line and in B-cells from MCL patients. We found that a large segment of der11containing deregulated genes was relocated from its normal position in the nuclear periphery towards the center of the nucleus in close proximity to the nucleolus where the abundant nucleolar protein nucleolin binds a subset of genes located close to the breakpoint and activates their expression. This finding allowed to identify new potential oncogenes involved in MCL and the mechanisms of their upregulation.

Author(s):  
Shahrukh Qureshi ◽  
Ravina Khandelwal ◽  
Maddala Madhavi ◽  
Naveesha Khurana ◽  
Neha Gupta ◽  
...  

Background: Mantle cell lymphoma (MCL) is a type of non-Hodgkin lymphoma characterized by the mutation and overexpression of the cyclin D1 protein by the reciprocal chromosomal translocation t(11;14)(q13:q32). Aim: The Present study aims to identify a potential inhibition of MMP9, Proteasome, BTK, and TAK1 and also determine the most suitable and effective protein target for the MCL. Methodology: 9 known inhibitors for MMP9, 24 for proteasome, 15 for BTK and 14 for TAK1 were screened. SB-3CT (PubChem ID: 9883002), Oprozomib (PubChem ID: 25067547), Zanubrutinib (PubChem ID: 135565884) and TAK1 inhibitor (PubChem ID: 66760355) were recognized as drugs with high binding capacity with their respective protein receptors. 41, 72, 102 and 3 virtual screened compounds were obtained after the similarity search with compound (PubChem ID:102173753), PubChem compound SCHEMBL15569297 (PubChem ID:72374403), PubChem compound SCHEMBL17075298 (PubChem ID:136970120) and compound CID: 71814473 with best virtual screened compounds. Results : MMP9 inhibitors shows the commendable affinity and good interaction profile of compound holding PubChem ID:102173753 over the most effective established inhibitor SB3CT. The pharmacophore study of the best virtual screened compound reveals the high efficacy of compound based on various interactions. The better affinity of the virtual screened compound with the target MMP9 protein was deduced using toxicity and integration profile studies. Conclusion: On the basis of ADMET profile, compound (PubChem ID: 102173753) could be a potent drug for MCL treatment. Similar to the established SB-3CT, the compound was also found to be non-toxic with LD50 values for both the compounds lying in the same range.


Blood ◽  
2020 ◽  
Vol 136 (5) ◽  
pp. 572-584 ◽  
Author(s):  
Prasath Pararajalingam ◽  
Krysta M. Coyle ◽  
Sarah E. Arthur ◽  
Nicole Thomas ◽  
Miguel Alcaide ◽  
...  

Abstract Mantle cell lymphoma (MCL) is an uncommon B-cell non-Hodgkin lymphoma (NHL) that is incurable with standard therapies. The genetic drivers of this cancer have not been firmly established, and the features that contribute to differences in clinical course remain limited. To extend our understanding of the biological pathways involved in this malignancy, we performed a large-scale genomic analysis of MCL using data from 51 exomes and 34 genomes alongside previously published exome cohorts. To confirm our findings, we resequenced the genes identified in the exome cohort in 191 MCL tumors, each having clinical follow-up data. We confirmed the prognostic association of TP53 and NOTCH1 mutations. Our sequencing revealed novel recurrent noncoding mutations surrounding a single exon of the HNRNPH1gene. In RNA-seq data from 103 of these cases, MCL tumors with these mutations had a distinct imbalance of HNRNPH1 isoforms. This altered splicing of HNRNPH1 was associated with inferior outcomes in MCL and showed a significant increase in protein expression by immunohistochemistry. We describe a functional role for these recurrent noncoding mutations in disrupting an autoregulatory feedback mechanism, thereby deregulating HNRNPH1 protein expression. Taken together, these data strongly imply a role for aberrant regulation of messenger RNA processing in MCL pathobiology.


2019 ◽  
Vol 7 ◽  
pp. 232470961985864
Author(s):  
Elvira Umyarova ◽  
Sreedhar Adapa ◽  
Srikanth Naramala ◽  
Vijay Gayam ◽  
Narothama Reddy Aeddula ◽  
...  

Mantle cell lymphoma (MCL) is a rare form of non-Hodgkin lymphoma characterized by clonal proliferation of follicular mantle zone B lymphocytes. It is caused by abnormal chromosomal translocation t(11;14) resulting in aberrant expression of cyclin D1. This leads to activation of anti-apoptotic pathways and abnormal proliferation of MCL cells. Patients can present with an indolent course or a fulminant disease with short overall survival. The disease frequently involves extranodal organs, but rarely manifests with neurological symptoms. We report a rare case of aberrant CD5-negative MCL presenting with aseptic meningitis.


2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Engin Kelkitli ◽  
Hilmi Atay ◽  
Levent Yıldız ◽  
Ahmet Bektaş ◽  
Mehmet Turgut

Mantle cell lymphoma (MCL) is a mature B-cell non-Hodgkin lymphoma. After the (11;14) translocation was identified as its constant finding in 1992, MCL was recognized as a separate subgroup of non-Hodgkin lymphoma (NHL). In MCL, extranodal involvement may be observed in the bone marrow, the spleen, the liver, and the gastrointestinal system (GIS). Cases of MCL that present with a massive and solitary rectal mass are rare in the literature. In this case report, our aim was to present an MCL patient with a rarely observed solitary rectal involvement mimicking rectal carcinoma and to discuss treatment options for this patient.


2018 ◽  
Vol 184 (2) ◽  
pp. 215-222 ◽  
Author(s):  
David J. Andorsky ◽  
Kathryn S. Kolibaba ◽  
Sarit Assouline ◽  
Andres Forero‐Torres ◽  
Vicky Jones ◽  
...  

2020 ◽  
Vol 13 (2) ◽  
pp. 774-782
Author(s):  
Drew A. Fajardo ◽  
Joel France ◽  
Bogna I. Targonska ◽  
H. Bobby Kahlon ◽  
Max J. Coppes

Mantle cell lymphoma (MCL) is a relatively rare B-cell non-Hodgkin lymphoma, typically presenting with extensive lymphadenopathy, bone marrow involvement, and splenomegaly. Extranodal sites can also be involved. We discuss a 73-year-old man whose MCL presented with a 6-month history of a subdermal mass of the right upper thigh and no systemic symptoms.


Blood ◽  
2011 ◽  
Vol 117 (10) ◽  
pp. 2807-2812 ◽  
Author(s):  
Jonathan W. Friedberg ◽  
Julie M. Vose ◽  
Jennifer L. Kelly ◽  
Faith Young ◽  
Steven H. Bernstein ◽  
...  

AbstractGiven the significant activity and tolerability of bendamustine, rituximab, and bortezomib in patients with relapsed indolent and mantle cell non-Hodgkin lymphoma, and laboratory studies suggesting synergistic activity, we conducted a multicenter phase 2 study of the bendamustine/bortezomib/rituximab combination. Patients with relapsed or refractory indolent and mantle cell lymphoma with adequate organ function were treated with bendamustine 90 mg/m2 days 1 and 4; rituximab 375 mg/m2 day 1, and bortezomib 1.3 mg/m2 days 1, 4, 8, 11. Six 28-day cycles were planned. Thirty patients (7 with mantle cell lymphoma) were enrolled and treated. Eight patients experienced serious adverse events, including one event of grade 5 sepsis. Common nonhematologic adverse events were generally grade 1 or grade 2 and included nausea (50%), neuropathy (47%), fatigue (47%), constipation (40%), and fever (40%). Of 29 patients evaluable for efficacy, 24 (83%) achieved an objective response (including 15 with complete response). With median follow-up of 24 months, 2-year progression-free survival is 47% (95% confidence interval, 25%-69%). On the basis of these promising results, the US cooperative groups have initiated randomized trials to evaluate this regimen in follicular and mantle cell lymphoma. This trial was registered at www.clinicaltrials.gov as #NCT00547534.


2010 ◽  
Vol 101 (9) ◽  
pp. 2054-2058 ◽  
Author(s):  
Michinori Ogura ◽  
Toshiki Uchida ◽  
Masafumi Taniwaki ◽  
Kiyoshi Ando ◽  
Takashi Watanabe ◽  
...  

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