scholarly journals Frequent germline mutations of HAVCR2 in sporadic subcutaneous panniculitis-like T-cell lymphoma

2019 ◽  
Vol 3 (4) ◽  
pp. 588-595 ◽  
Author(s):  
Chantana Polprasert ◽  
Yasuhide Takeuchi ◽  
Nobuyuki Kakiuchi ◽  
Kenichi Yoshida ◽  
Thamathorn Assanasen ◽  
...  
Keyword(s):  
T Cell ◽  
Somatic Mutations ◽  
Cell Lymphoma ◽  
Germline Mutations ◽  
T Cell Lymphoma ◽  
Compound Heterozygous ◽  
Missense Mutations ◽  
Whole Exome ◽  
History Of ◽  
Underlying Diseases

Abstract Subcutaneous panniculitis-like T-cell lymphoma (SPTCL) is a rare subtype of peripheral T-cell lymphoma affecting younger patients and associated with hemophagocytic lymphohistiocytosis. To clarify the molecular pathogenesis of SPTCL, we analyzed paired tumor and germline DNAs from 13 patients by whole-exome sequencing. All cases were Asians and were phenotypically sporadic with no family history of SPTCL. Consistent with a recent report, germline mutations in HAVCR2, encoding T-cell immunoglobulin mucin 3 (TIM3), were identified in 11 of 13 (85%) cases. All mutated cases were primary SPTCL, whereas the 2 cases without mutation were secondary SPTCL associated with underlying diseases, including viral infection and autoimmune disease. Ten patients harbored homozygous p.Y82C mutations, and 1 showed compound heterozygous mutations (p.Y82C and p.T101I). Both missense mutations altered highly conserved residues located in the extracellular immunoglobulin variable–like domain. According to the Genome Aggregation Database of >138 500 general individuals, both mutations were documented with minor allele frequencies < 0.007, indicating remarkable enrichment of these HAVCR2 alleles in SPTCL. SPTCL cells also harbored somatic mutations (6.2 per patient) that are frequently identified in genes associated with epigenetic regulation and signal transduction. In conclusion, individuals harboring biallelic HAVCR2 (TIM3) germline mutations were highly susceptible to sporadic SPTCL, which was also associated with clonal somatic mutations.

Whole Exome Sequencing of Type 1 and Type 2 Enteropathy-Associated T Cell Lymphoma Reveals Genetic Basis of Eatl Oncogenesis

Blood ◽  
2015 ◽  
Vol 126 (23) ◽  
pp. 575-575
Author(s):  
Sarah Lynn Ondrejka ◽  
Andrea B. Moffitt ◽  
Eric Tse ◽  
Eric D. Hsi ◽  
John R. Goodlad ◽  
...  
Keyword(s):  
Gene Expression ◽  
T Cell ◽  
Somatic Mutations ◽  
Cell Lymphoma ◽  
Expression Patterns ◽  
T Cell Lymphoma ◽  
Sequencing Data ◽  
Whole Exome

Abstract Introduction Enteropathy-associated T cell lymphoma (EATL) is an intestinal tumor of the intraepithelial T lymphocytes, with a median survival time of less than 1 year. It is a rare disease in general and has two main subtypes described. Type 1 EATL is a complication in patients with celiac disease, a chronic gluten-sensitive enteropathy. Type 2 EATL, characterized by smaller monomorphic lymphocytes, typically occurs sporadically in patients without celiac disease. Very little is known about the genetic mutations and gene expression signatures that define this disease, or the extent to which the two types of EATL are genetically distinct. It has been suggested that the two types of EATLs should be reclassified as separate diseases in future WHO categories. Methods In this study, we performed whole exome sequencing to 100-fold depth of 41 EATL tumors including 23 type 1 cases and 18 type 2 cases. Both alpha-beta (65%) and gamma-delta (35%) T cell receptor rearrangements were seen among these cases. Paired normal DNA was sequenced in most (N=30) cases. We defined somatic mutations, copy number alterations, and HLA genotypes in these cases from sequencing data. Additionally, we generated RNA sequencing data on the same EATL tumors. Corresponding clinical and outcome data was collected on the same cohort. Results We found that both type 1 and type 2 EATLs had overlapping patterns of mutations and similar overall survival. The most commonly mutated genes were chromatin modifier genes (34%) including ATRX and ARID1B. We also identified recurrent somatic mutations in signal transduction genes, including JAK1 and BCL9L. TP53 mutations were also recurrent (12%). Copy number amplifications in 9q, 1q, and 8q occurred most frequently and were present in both subtypes. We further compared the mutational profiles to peripheral T cell lymphoma, angioimmunoblastic T cell lymphoma, cutaneous T cell lymphoma, natural killer/T cell lymphoma, diffuse large B cell lymphoma, and Burkitt lymphoma. These comparisons identify EATL as a genetically distinct disease with a very different pattern of mutations. RNAseq identified the gene expression patterns that are unique to EATL and also identified gene expression signatures that distinguish the two types of EATL. The DQ2 or DQ8 HLA genotype is present in the majority of type 1 cases (73%) while occurring infrequently in type 2 cases (27%). Conclusions Our study defines the genetic landscape of enteropathy associated T cell lymphoma and highlights the genetic and clinical overlap between the two types. While the two types have differences in mutations and gene expression patterns, they have more in common with each other compared to other lymphoma types. Our data may inform future decisions regarding the potential separation of the two EATL types as distinct entities. Disclosures No relevant conflicts of interest to declare.

scholarly journals Whole exome sequencing identifies recessive germline mutations in FAM160A1 in familial NK/T cell lymphoma

2018 ◽  
Vol 8 (11) ◽  
Author(s):  
Jason Yongsheng Chan ◽  
Alvin Yu Jin Ng ◽  
Chee Leong Cheng ◽  
Maarja-Liisa Nairismägi ◽  
Byrappa Venkatesh ◽  
...  
Keyword(s):  
T Cell ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Cell Lymphoma ◽  
Germline Mutations ◽  
T Cell Lymphoma ◽  
Whole Exome ◽  
Nk T Cell

scholarly journals Enteropathy associated T-cell lymphoma

2007 ◽  
Vol 135 (1-2) ◽  
pp. 80-84
Author(s):  
Milena Bakrac ◽  
Branka Bonaci-Nikolic ◽  
Natasa Colovic ◽  
Sanja Simic-Ogrizovic ◽  
Miodrag Krstic ◽  
...  
Keyword(s):  
T Cell ◽  
Cell Lymphoma ◽  
Previous History ◽  
Lymph Node Biopsy ◽  
Intestinal Wall ◽  
T Cell Lymphoma ◽  
The Third ◽  
History Of ◽  
Small Intestinal ◽  
Mesenterial Lymph Node

Enteropathy associated T-cell lymphoma (EATCL) is a high grade, pleomorphic peripheral T-cell lymphoma with usually cytotoxic phenotype. This is a case report of three patients with EATCL. The first patient was 50 year-old woman with four year history of gluten sensitive enteropathy (GSE). Diagnosis of lymphoma was confirmed after the resection of the jejunum (small intestine obstruction). Pathohistological (PAS, Reticulin, Giemsa) and immunohistochemical (anti-LCA, anti-CD20, anti- CD45RO, anti-CD3) methods revealed the diagnosis of EATCL: CD45RO+, CD3+. After the third cycle of chemotherapy, the disease progressed with massive lung infiltration. Patient died due to complications of bone marrow aplasia. The second patient was 23 year-old woman with long earlier history of GSE. She presented with the acute renal failure. According to established diagnosis of tubulointerstitial nephritis, she was treated with pulse doses of steroid therapy. After temporary improvement, she had dissemination of the disease. On MRI, small intestinal wall was thickened, and abdominal lymph nodes were enlarged with extraluminal compression of common bile duct. Laparotomy with mesenterial lymph node biopsy and consecutive pathohistological and immunohistochemical analyses revealed the diagnosis of EATCL. The patient received chemotherapy, but she died with signs of pulmonary embolization. The third patient was 53 year-old woman without previous history of GSE. Diagnosis of EATCL was revealed after the resection of jejunum because of small intestinal obstruction. She received two cycles of chemotherapy, but she died with signs of disease progression. IgA antiendomysial antibodies were detected in the serum of all patients. The overall survival of patients was 7 months. The possibility of lymphoma rising in patients with clinical progression of GSE despite gluten free diet must be kept in mind.

Sustained, Durable Responses with Alemtuzumab in Refractory Angioimmunoblastic T-Cell Lymphoma.

Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 2730-2730
Author(s):  
Jennifer E. Amengual ◽  
Bruce G. Raphael
Keyword(s):  
T Cell ◽  
Cell Lymphoma ◽  
Receptor Gene ◽  
Response Duration ◽  
T Cell Lymphoma ◽  
Surface Glycoprotein ◽  
Sustained Remission ◽  
Cell Surface Glycoprotein ◽  
Angioimmunoblastic T Cell Lymphoma ◽  
History Of

Abstract 2730 Poster Board II-706 Angioimmunoblastic T-cell lymphoma (AITL) is a rare subtype representing 2% of Non-Hodgkin's Lymphoma characterized by lymphadenopathy, hepatosplenomegaly, anemia, hypergammaglobulinemia and immune dysfunction. Prognosis is poor with a median survival of less than 36 months. There is no standard treatment for AITL. Most patients initially respond to treatment, but relapse within short time intervals. Alemtuzumab is a humanized monoclonal antibody that binds to CD52 antigen, a cell surface glycoprotein with high expression on T-cells. We report three patients with refractory AITL, with confirmed T-cell receptor gene rearrangements, who achieved sustained, durable responses with alemtuzumab. The table below lists the treatment regimens, duration of remissions and complications for all 3 cases. Infectious and autoimmune complications were effectively treated in all.PatientPrevious Treatment (Response duration, months)Alemtuzumab (Response duration)InfectionsAutoimmune manifestationsACHOP (10) Cytoxan-P (1) Gemzar-P (1)24 monthsCMVBCHOPE (10) ICE (0) Gemcitabine-P followed by Cyclosporine maintenance (1)>24 monthsAspergillusAgranulocytosis Autoimmune hemolytic anemiaCCHOP (1)>14 monthsCMV Legionella Patient A was a 73 year-old female who presented with lymphadenopathy and biopsy proven AITL. Her longest remission was 10 months following CHOP. She was started on alemtuzumab 30 mg 3 times per week for 4 weeks in June 2007 after relapsing. Her only complication from treatment was CMV infection. She remained in remission until June 2009 when she relapsed in her liver and colon. She was treated with alemtuzumab and prednisone for 2 weeks, but developed neutropenic fever, CMV and died July 2009. Patient B is a 73 year-old male with a history of ITP who presented in July 2005 with fevers, lymphadenopathy and anemia, and biopsy proven AITL. His longest remission was 10 months with CHOPE. In June 2007, the patient was treated with alemtuzumab for 7 weeks after relapsing. Treatment complications included Aspergillus pneumonia, agranulocytosis and autoimmune hemolytic anemia. He achieved a complete response as evidenced by PET/CT scan. He remains in remission 2 years later. Patient C is a 62 year-old woman with a history of MGUS who presented in 2007 with rapidly growing lymphadenopathy and a biopsy that revealed AITL. She never achieved a sustained remission with chemotherapy. June 2008, the patient was treated with alemtuzumab for 6 weeks, complicated by CMV and Legionella pneumonia. She remains in remission now over 14 months. Here we have shown remarkable success with short courses of alemtuzumab. Three patients remained disease free for an average of 21 months; two remissions are on-going. This report demonstrates sustained responses for patients with AITL, suggesting that alemtuzumab is a valid and rational treatment choice in heavily pretreated patients. We propose using anti-CD52 therapy as consolidation after primary response to conventional chemotherapy in patients with AITL. Disclosures: Off Label Use: Alemtuzumab is not licensed for use in Angioimmunoblastic T-cell Lymphoma.

scholarly journals Primary Cutaneous CD30-Positive Large T-Cell Lymphoma in an 80-Year-Old Man: A Case Report

2011 ◽  
Vol 2011 ◽  
pp. 1-3 ◽  
Author(s):  
Rehan Hussain ◽  
Amir Bajoghli
Keyword(s):  
T Cell ◽  
Cell Lymphoma ◽  
Large Cell ◽  
T Cell Lymphoma ◽  
Cutaneous T Cell Lymphoma ◽  
Left Forearm ◽  
Favorable Prognosis ◽  
History Of ◽  
Indolent Disease ◽  
Rule Out

Primary cutaneous CD30-positive large cell lymphoma (CD30+ PCLCL) is a rare subtype of cutaneous T-cell lymphoma (CTCL) that can present in a variety of ways. We report a patient with a three-month history of an enlarging, exophytic mass with two smaller satellite lesions on the left forearm. Biopsy of the skin stained positive for CD30, and, after thorough systemic evaluation, a diagnosis of CD30+ PCLCL was made. When PCLCL is suspected, it is important to perform immunohistological studies for CD30 types and conduct a thorough workup to rule out systemic LCL. These measures will reduce the use of unnecessarily aggressive chemotherapy regimens for CD30+ PCLCL, an indolent disease with a favorable prognosis.

Recurrent Missense Mutations in the STAT3 Gene in LGL Leukemia Provide Insights to Pathogenetic Mechanisms and Suggest Potential Diagnostic and Therapeutic Applications

Blood ◽  
2011 ◽  
Vol 118 (21) ◽  
pp. 936-936
Author(s):  
Hanna Koskela ◽  
Samuli Eldfors ◽  
Henrikki Almusa ◽  
Emma Andersson ◽  
Pekka Ellonen ◽  
...  
Keyword(s):  
T Cell ◽  
Exome Sequencing ◽  
Missense Mutation ◽  
Whole Exome Sequencing ◽  
Somatic Mutations ◽  
Index Patient ◽  
Missense Mutations ◽  
Whole Exome ◽  
Stat3 Mutations ◽  
Lgl Leukemia

Abstract Abstract 936 BACKGROUND: T-cell large granular lymphocyte (LGL) leukemia is an uncommon lymphoproliferative disorder characterized in most cases by expansion of mature, clonal CD3+CD8+ cytotoxic T lymphocytes (CTLs). The pathogenesis of LGL-leukemia is unknown, and leukemic cells closely resemble normal terminally differentiated effector memory CTLs. While resistance to apoptotic pathways (Fas/Fas ligand, sphingolipid) and activation of survival signaling pathways (Ras) have been implicated in LGL leukemia, the underlying genetic defects have not yet been elucidated. We aimed to identify somatic mutations in LGL leukemia by whole exome sequencing of leukemic and matched healthy control cells. METHODS: Our index patient is a 70 year-old male with untreated CD8+ LGL leukemia diagnosed in 2009 with a clonal rearrangement in the T-cell receptor (TCR) delta and gamma gene. He has been asymptomatic with grade 2 neutropenia and an absolute lymphocyte count of 4–15 ×109/L. The patient had one large predominant T-cell clone: 94% of CD8+ cells consisted of a single Vβ16 clone, as assessed by flow cytometry. No clonal expansions were observed in the CD4+ fraction. DNA was extracted from FACS-sorted CD8+ (leukemic) and CD4+ (control) cells and sequenced by exome capture using an Agilent SureSelect All exon 50 MB capture kit and the Illumina GAII sequencing platform. Candidate somatic mutations were identified with a bioinformatics pipeline consisting of BWA for sequence alignment, Samtools for alignment filtering and Varscan for somatic mutation calling. Mutations were manually reviewed in IGV for alignment artifacts and validated by capillary sequencing. DNA samples from 8 additional untreated LGL-leukemia patients were used for further screening of confirmed somatic mutations by capillary sequencing. From six of these patients DNA was extracted from CD8 sorted cells and from two patients from whole blood. RESULTS: Whole exome sequencing of CD8+ leukemic DNA from the index patient identified a missense mutation in the STAT3 gene (D661V), which was subsequently confirmed by capillary sequencing. As STAT3 signaling has been associated with LGL leukemia pathogenesis previously, we next designed primers for the secondary screening of the six exomes of STAT3 SH2 region from the remaining patients. Another recurrent somatic missense mutation (STAT3 Y640F) was identified in two additional patients. Thus, three out of nine LGL patients (33%) showed evidence of mutations in the STAT3 SH2 region. Both missense mutations found (D661V and Y640F) were located in the area of the SH2 domain known to mediate STAT3 protein dimerization and activation. The Y640F mutation alters a conserved tyrosine residue leading to a hyperactivating STAT protein (Scarzello et al. Mol Biol Cell, 2007) and was recently found in a human inflammatory hepatocellular adenoma causing cytokine-independent tyrosine phosphorylation and activation as well as cytokine-dependent hyperactivation of STAT3 (Pitali et al., J Exp Med, 2011). The D661V mutation has not been described previously. CONCLUSIONS: Our data imply for the first time that STAT3 is a common mutational target in LGL leukemia, revealing insights to the molecular pathogenesis of this rare disease. Known structural and functional data on STAT biology imply that the mutations are leading to STAT3 hyperactivation and could also confer ligand-independent signaling. While confirmatory data from a larger series of patients are necessary, our results pinpoint STAT3 mutations and aberrations in the STAT3 pathway as key pathogenetic events in true clonal LGL leukemia. Detection of STAT3 mutations could therefore be applied in the diagnostic assessment, disease stratification and therapeutic monitoring of LGL patients. Disclosures: Koskela: Novartis: Honoraria. Kuittinen:Roche: Consultancy. Porkka:Novartis: Honoraria; Bristol-Myers Squibb: Honoraria. Mustjoki:Novartis: Honoraria; Bristol-Myers Squibb: Honoraria.

scholarly journals Matrix Metalloproteinase-2 Promoter Genotype as a Marker of Cutaneous T-Cell Lymphoma Early Stage

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Anna Vasku ◽  
Julie Bienertova Vasku ◽  
Miroslav Nečas ◽  
Vladimir Vasku
Keyword(s):  
T Cell ◽  
Skin Diseases ◽  
Cell Lymphoma ◽  
Early Stage ◽  
Clinical Diagnostics ◽  
T Cell Lymphoma ◽  
Matrix Metalloproteinase 2 ◽  
Potential Candidate ◽  
Cutaneous T Cell Lymphoma ◽  
History Of

The aim of the study was to investigate the DNA polymorphic genotype in MMP-2 promoter gene as a potential candidate region for the development of the cutaneous T-cell lymphoma (CTCL) and/or its progression. A total of 89 Czech patients with CTCL (including 23 patients with large plaque parapsoriasis) were compared to 198 controls of similar age and sex distribution, without personal or family history of chronic skin diseases and without personal history of malignancy. The three selected polymorphisms in the promoter of MMP-2 gene (−1575G/A,−1306C/T, and−790T/G) were determined using the PCR-based methodology with RFLP. In our cohort, the associatedGGCCTTMMP-2 promoter genotype was highly significantly more frequent in CTCL-Ia stage patients compared to patients with parapsoriasis, the tests having high sensitivity and specificity (78%, 83%, resp.). To conclude, use of associated MMP-2 promoter genotype as a DNA marker might make it possible to distinguish between the patients with parapsoriasis and those with CTCL stage Ia, which could substantially improve possibilities of clinical diagnostics, therapy design, and prognosis of this serious condition in the early stages.

Sign in / Sign up

Export Citation Format

Share Document