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Fang R, Vallius T, Zhang A, Cura DV, Alicandri F, Fischer G, Draper E, Xu S, Pelletier R, Katsyv I, Sorger PK, Murphy GF, Lian CG. PRAME expression in melanoma is negatively regulated by TET2-mediated DNA hydroxymethylation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.26.605293. [PMID: 39091741 PMCID: PMC11291125 DOI: 10.1101/2024.07.26.605293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Preferentially Expressed Antigen in Melanoma (PRAME) and Ten-Eleven Translocation (TET) dioxygenase-mediated 5-hydroxymethylcytosine (5hmC) are emerging melanoma biomarkers. We observed an inverse correlation between PRAME expression and 5hmC levels in benign nevi, melanoma in situ, primary invasive melanoma, and metastatic melanomas via immunohistochemistry and multiplex immunofluorescence: nevi exhibited high 5hmC and low PRAME, whereas melanomas showed the opposite pattern. Single-cell multiplex imaging of melanoma precursors revealed that diminished 5hmC coincides with PRAME upregulation in premalignant cells. Analysis of TCGA and GTEx databases confirmed a negative relationship between TET2 and PRAME mRNA expression in melanoma. Additionally, 5hmC levels were reduced at the PRAME 5' promoter in melanoma compared to nevi, suggesting a role for 5hmC in PRAME transcription. Restoring 5hmC levels via TET2 overexpression notably reduced PRAME expression in melanoma cell lines. These findings establish a function of TET2-mediated DNA hydroxymethylation in regulating PRAME expression and demonstrate epigenetic reprogramming as pivotal in melanoma tumorigenesis. Teaser Melanoma biomarker PRAME expression is negatively regulated epigenetically by TET2-mediated DNA hydroxymethylation.
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Wan Y, Shen J, Hong Y, Liu J, Shi T, Cai J. Mapping knowledge landscapes and emerging trends of the biomarkers in melanoma: a bibliometric analysis from 2004 to 2022. Front Oncol 2023; 13:1181164. [PMID: 37427124 PMCID: PMC10327294 DOI: 10.3389/fonc.2023.1181164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 06/07/2023] [Indexed: 07/11/2023] Open
Abstract
Background Melanoma is a skin tumor with a high mortality rate, and early diagnosis and effective treatment are the key to reduce its mortality rate. Therefore, more and more attention has been paid for biomarker identification for early diagnosis, prognosis prediction and prognosis evaluation of melanoma. However, there is still a lack of a report that comprehensively and objectively evaluates the research status of melanoma biomarkers. Therefore, this study aims to intuitively analyze the research status and trend of melanoma biomarkers through the methods of bibliometrics and knowledge graph. Objective This study uses bibliometrics to analyze research in biomarkers in melanoma, summarize the field's history and current status of research, and predict future research directions. Method Articles and Reviews related to melanoma biomarkers were retrieved by using Web of Science core collection subject search. Bibliometric analysis was performed in Excel 365, CiteSpace, VOSviewer and Bibliometrix (R-Tool of R-Studio). Result A total of 5584 documents from 2004 to 2022 were included in the bibliometric analysis. The results show that the number of publications and the frequency of citations in this field are increasing year by year, and the frequency of citations has increased rapidly after 2018. The United States is the most productive and influential country in this field, with the largest number of publications and institutions with high citation frequency. Caroline Robert, F. Stephen Hodi, Suzanne L. Topalian and others are authoritative authors in this field, and The New England Journal of Medicine, Journal of Clinical Oncology and Clinical Cancer Research are the most authoritative journals in this field. Biomarkers related to the diagnosis, treatment and prognosis of melanoma are hot topics and cutting-edge hotspots in this field. Conclusion For the first time, this study used the bibliometric method to visualize the research in the field of melanoma biomarkers, revealing the trends and frontiers of melanoma biomarkers research, which provides a useful reference for scholars to find key research issues and partners.
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Affiliation(s)
- Yantong Wan
- Guangdong Provincial Key Laboratory of Proteomics, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Junyi Shen
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Yinghao Hong
- Guangdong Provincial Key Laboratory of Proteomics, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Jinghua Liu
- Guangdong Provincial Key Laboratory of Proteomics, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Tieliu Shi
- The Center for Bioinformatics and Computational Biology, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, China
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University & Capital Medical University, Beijing, China
| | - Junwei Cai
- Guangdong Provincial Key Laboratory of Proteomics, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
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Ricci C, Dika E, Lambertini M, Ambrosi F, Chiarucci F, Chillotti S, Fiorentino M, Fabbri E, Tassone D, Veronesi G, Tartari F, Corti B. The EORTC protocol for sentinel lymph node biopsy (SLNB) reveals a high number of nodal nevi and a strong association with nevus-associated melanoma. Pathol Res Pract 2022; 233:153805. [PMID: 35361504 DOI: 10.1016/j.prp.2022.153805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/04/2022] [Accepted: 02/09/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND The diagnosis of nodal nevi (NN) is challenging as they mimic melanoma metastases (MM), with a detection rate mostly ranging between 1% and 11% in sentinel lymph node biopsy (SLNB). Herein, we assessed the incidence of NN and the association with the clinical-pathological features of primary melanoma, adopting the updated European Organisation for Research and Treatment of Cancer (EORTC) protocol for SLNB. METHODS All cases of paired melanoma and SLNB were retrospectively evaluated (April 2019-May 2020). Appropriate statistical tests were adopted, with significant variables included in the logistic regression model. RESULTS 81 patients and a total of 186 lymph nodes (LNs) were included. Eleven patients had only NN and 4 had both NN and MM (18.5%); 29 LNs (15.6%) showed at least one NN and 12 (6.5%) showed more than one NN (a total amount of 43 NN was detected). All NN and none MM stained for p16. NN were associated with age < 60 years (p: 0.042), no ulceration (p: 0.025) and nevus-associated melanoma (NAM) (p: 0.018), with this latter being the only predictor at the logistic regression model (p: 0.022). CONCLUSIONS The updated EORTC protocol shows a high number of NN and highlights a strong association with NAM.
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Affiliation(s)
- Costantino Ricci
- Pathology Unit, Maggiore Hospital, AUSL Bologna, Bologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
| | - Emi Dika
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
| | - Martina Lambertini
- Dermatology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | | | - Federico Chiarucci
- Pathology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | - Stefano Chillotti
- Pathology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | - Michelangelo Fiorentino
- Pathology Unit, Maggiore Hospital, AUSL Bologna, Bologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy; Dermatology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy; Pathology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy.
| | - Erich Fabbri
- Department of Facial Surgery, Plastic Surgery Unit, Bellaria Hospital, Bologna, Italy
| | - Daniela Tassone
- Plastic Surgery Department, Sant'Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Giulia Veronesi
- Dermatology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | - Federico Tartari
- Dermatology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | - Barbara Corti
- Pathology Unit, IRCCS Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
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Müller CSL, Müller SG, Vogt T, Pföhler C. Current concepts of ectopic nodal inclusions with special emphasis on nodal nevi. J Dtsch Dermatol Ges 2021; 19:1145-1157. [PMID: 34390159 DOI: 10.1111/ddg.14521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/18/2021] [Indexed: 11/29/2022]
Abstract
Nodal inclusions of ectopic tissue within lymph nodes are seen comparatively often in dermatopathology and general pathology. Glandular and nonglandular epithelium, as well as melanocytic nevi can be observed within lymph nodes and represent mostly incidental findings without any relevance. The main challenge in reporting these morphologic features is to differentiate such benign inclusions from metastatic settlements of distinct organ tumors. As sentinel node biopsy and lymph node dissection have become standard procedure in clinical oncology and have an immense clinical impact, the correct evaluation of these nodal inclusions is indispensable to avoid undertreatment or overtreatment of patients. In addition, the genesis of these inclusions has not yet been satisfactorily clarified. Two concepts have been laid out: the theory of benign metastases and the migration arrest theory. However, neither theory has so far been able to answer the following questions: Why do we find more nodal nevi in patients with melanoma who had a sentinel node biopsy than in patients without melanoma, and why do we not find nodal nevi in deep visceral lymph nodes? We present a comprehensive review of the current knowledge on nodal inclusions, proposing a concept for the pathogenesis of nodal nevi, to answer these questions.
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Affiliation(s)
- Cornelia Sigrid Lissi Müller
- Medical supply center for Histology, Cytology, and Molecular diagnostics Trier GmbH, Wissenschaftspark Trier, TRIER, Germany
| | - Stephan G Müller
- Department of General-, Visceral-, Vascular- and Pediatric Surgery, Saarland University Medical Center, Homburg/Saar, Germany
| | - Thomas Vogt
- Department of Dermatology, Allergology, and Venerology, Saarland University Medical Center, Homburg/Saar, Germany
| | - Claudia Pföhler
- Department of Dermatology, Allergology, and Venerology, Saarland University Medical Center, Homburg/Saar, Germany
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5
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Müller CSL, Müller SG, Vogt T, Pföhler C. Aktuelle Konzepte zu ektopen Lymphknoten‐Einschlüssen unter besonderer Berücksichtigung nodaler Nävi. J Dtsch Dermatol Ges 2021; 19:1145-1158. [PMID: 34390137 DOI: 10.1111/ddg.14521_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/18/2021] [Indexed: 11/28/2022]
Affiliation(s)
| | - Stephan G Müller
- Klinik für allgemeine Chirurgie, Viszeral-, Gefäß- und Kinderchirurgie, Universitätsklinikum des Saarlandes, Homburg/Saar
| | - Thomas Vogt
- Klinik für Dermatologie, Allergologie und Venerologie, Universitätsklinikum des Saarlandes, Homburg/Saar
| | - Claudia Pföhler
- Klinik für Dermatologie, Allergologie und Venerologie, Universitätsklinikum des Saarlandes, Homburg/Saar
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Three Types of Nodal Melanocytic Nevi in Sentinel Lymph Nodes of Patients With Melanoma: Pitfalls, Immunohistochemistry, and a Review of the Literature. Am J Dermatopathol 2021; 42:739-744. [PMID: 32271206 DOI: 10.1097/dad.0000000000001645] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The presence or absence of metastasis in sentinel lymph nodes often drives melanoma staging, prognosis, and treatment. However, distinguishing between metastatic melanoma cells and clusters of benign melanocytic nevus cells is not always straightforward. When morphologic hematoxylin and eosin interpretation alone is not sufficient, additional hematoxylin and eosin sections and immunohistochemical (IHC) studies may be beneficial. This review and small cases series of 3 diagnostically challenging melanocytic sentinel lymph node cases highlights the IHC approach to evaluate intraparenchymal nodal melanocytic nevi, coexistent metastatic melanoma with adjacent melanocytic nevi cells, and nodal blue nevi. In challenging cases, cytological morphology of the melanocytes, location within the lymph node, and IHC studies may assist in diagnosis. If these tools yield conflicting results, expert opinion is recommended.
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7
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Abstract
Histone posttranslational modifications (PTMs) have been shown to be dysregulated in multiple cancers including melanoma, and as they are abundant and easily detectable, they make ideal biomarkers. The aim of this study was to identify histone PTMs that could be potential biomarkers for melanoma diagnosis. Previously, we utilized mass spectrometry to identify histone PTMs that were dysregulated in matched melanoma cell lines and found two modifications, H3 lysine 27 trimethylation (histone H3K27me3) and H4 lysine 20 monomethylation (histone H4K20me), that were differentially expressed in the more aggressive compared to the less aggressive cell line. In this study, we performed immunohistochemistry on tissue microarrays containing 100 patient tissue spots; 18 benign nevi, 62 primary, and 20 metastatic melanoma tissues. We stained for histone H3K27me3 and histone H4K20me to ascertain whether these histone PTMs could be used to distinguish different stages of melanoma. Loss of histone H4K20me was observed in 66% of malignant patient tissues compared to 14% of benign nevi. A majority (79%) of benign nevi had low histone H3K27me3 staining, while 72% of malignant patient tissues showed either a complete loss or had strong histone H3K27me3 staining. When we analyzed the staining for both marks together, we found that we could identify 71% of the benign nevi and 89% of malignant melanomas. Histone H3K27me3 or histone H4K20me display differential expression patterns that can be used to distinguish benign nevi from melanoma; however, when considered together the diagnostic utility of these PTMs increased significantly. The work presented supports the use of combination immunohistochemistry of histone PTMs to increase accuracy and confidence in the diagnosis of melanoma.
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8
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See SHC, Finkelman BS, Yeldandi AV. The diagnostic utility of PRAME and p16 in distinguishing nodal nevi from nodal metastatic melanoma. Pathol Res Pract 2020; 216:153105. [PMID: 32825968 DOI: 10.1016/j.prp.2020.153105] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 01/12/2023]
Abstract
The status of the sentinel lymph node is the strongest predictor of recurrence in patients with malignant melanoma, making accurate distinction between nodal metastases and nodal nevi of paramount importance. We explored the utility of p16 and PRAME in differentiating nodal nevi from metastatic melanoma by immunohistochemistry. We searched our institutional database for cases of nodal nevi and nodal metastatic melanoma. p16 and PRAME expression were assessed with immunolabeling quantified by extent of nuclear positivity (0-25 %, >25 %-50 %, >50 %-75 % and >75 %). Sensitivities and specificities were calculated, and discrimination assessed using the area under the receiver operating characteristic curve (AUC). Forty-nine cases out of 51 nevi and 56/56 melanoma cases had lesional tissue present for p16, while 44/51 nevi and 54/56 melanoma cases had lesional tissue present for PRAME. 43 nodal nevi (88 %) had >50 % nuclear staining for p16, while none had >50 % staining for PRAME. More than half (55 %) of melanoma cases had complete loss of nuclear staining for p16, while majority (94 %) had >50 % nuclear staining for PRAME. Using a cut-off value of 50 %, higher PRAME expression had a sensitivity and specificity of 94 % and 100 %, respectively, while lower p16 expression had a sensitivity and specificity of 66 % and 88 %, respectively, for detecting metastatic melanoma. PRAME showed significantly better discrimination (AUC = 0.97, 95 % CI 0.94-1.00) than p16 (AUC = 0.77, 95 % CI 0.68-0.86) for differentiating nodal nevi from nodal melanoma (P < 0.001). Our findings suggest that PRAME is more accurate than p16 in discriminating between the two entities, with excellent sensitivity and specificity.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antigens, Neoplasm/metabolism
- Biomarkers, Tumor/analysis
- Cyclin-Dependent Kinase Inhibitor p16/metabolism
- Diagnosis, Differential
- Female
- Humans
- Lymphatic Metastasis/pathology
- Male
- Melanoma/diagnosis
- Melanoma/metabolism
- Melanoma/pathology
- Middle Aged
- Neoplasm Recurrence, Local/diagnosis
- Neoplasm Recurrence, Local/metabolism
- Neoplasm Recurrence, Local/pathology
- Neoplasms, Second Primary/diagnosis
- Neoplasms, Second Primary/pathology
- Nevus, Pigmented/diagnosis
- Nevus, Pigmented/pathology
- Sentinel Lymph Node Biopsy/methods
- Skin Neoplasms/diagnosis
- Skin Neoplasms/metabolism
- Skin Neoplasms/pathology
- Melanoma, Cutaneous Malignant
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Affiliation(s)
- Sharlene Helene C See
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - Brian S Finkelman
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Anjana V Yeldandi
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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9
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Immunohistochemistry for PRAME in the Distinction of Nodal Nevi From Metastatic Melanoma. Am J Surg Pathol 2020; 44:503-508. [PMID: 31633488 DOI: 10.1097/pas.0000000000001393] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The distinction of metastatic melanoma from melanocytic nevi in lymph nodes can on occasion be difficult. As diffuse immunohistochemical (IHC) PRAME (PReferentially expressed Antigen in MElanoma) expression is detected in the majority of primary and metastatic melanomas, but rarely in nevi, we reasoned that PRAME could be a useful adjunct marker for the diagnosis of melanocytes in lymph nodes. In this study, we examined 45 nodal melanocytic deposits comprising 30 nodal nevi and 15 melanoma metastases. The latter were diagnostically not straightforward because they either coexisted with nodal nevi or were present in perinodal fibrous tissue. All nodal nevi (30/30) were negative for PRAME, whereas all melanoma metastases (15/15) were diffusely positive for PRAME IHC. We additionally report the novel use of a PRAME/Melan A dual-label immunostain. Our results show that PRAME IHC may be useful in the assessment of diagnostically challenging nodal melanocytic deposits, such as intraparenchymal nodal nevi, metastases confined to the capsular fibrous tissue, or in the setting of small metastases coexisting with a nodal nevus in the same lymph node.
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10
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Xu Y, Mu Y, Wang L, Zhang X. Detailed Analysis of Molecular Mechanisms in Primary and Metastatic Melanoma. J Comput Biol 2020; 27:9-19. [PMID: 31424282 DOI: 10.1089/cmb.2019.0197] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Yangchun Xu
- Department of Dermatology and Second Hospital of Jilin University, Changchun, China
| | - Yan Mu
- Department of Dermatology and Second Hospital of Jilin University, Changchun, China
| | - Ling Wang
- Department of Gynecology, Second Hospital of Jilin University, Changchun, China
| | - Xuan Zhang
- Second Hospital of Jilin University, Changchun, China
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11
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Davis LE, Shalin SC, Tackett AJ. Current state of melanoma diagnosis and treatment. Cancer Biol Ther 2019; 20:1366-1379. [PMID: 31366280 PMCID: PMC6804807 DOI: 10.1080/15384047.2019.1640032] [Citation(s) in RCA: 431] [Impact Index Per Article: 86.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 05/23/2019] [Accepted: 06/23/2019] [Indexed: 12/13/2022] Open
Abstract
Melanoma is the deadliest form of skin cancer. In the early stages, melanoma can be treated successfully with surgery alone and survival rates are high, but after metastasis survival rates drop significantly. Therefore, early and correct diagnosis is key for ensuring patients have the best possible prognosis. Melanoma misdiagnosis accounts for more pathology and dermatology malpractice claims than any cancer other than breast cancer, as an early misdiagnosis can significantly reduce a patient's chances of survival. As far as treatment for metastatic melanoma goes, there have been several new drugs developed over the last 10 years that have greatly improved the prognosis of patients with metastatic melanoma, however, a majority of patients do not show a lasting response to these treatments. Thus, new biomarkers and drug targets are needed to improve the accuracy of melanoma diagnosis and treatment. This article will discuss the major advancements of melanoma diagnosis and treatment from antiquity to the present day.
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Affiliation(s)
- Lauren E. Davis
- University of Arkansas for Medical Sciences, Department of Biochemistry and Molecular Biology, Little Rock, AR, USA
| | - Sara C. Shalin
- University of Arkansas for Medical Sciences, Department of Pathology, Little Rock, AR, USA
| | - Alan J. Tackett
- University of Arkansas for Medical Sciences, Department of Biochemistry and Molecular Biology, Little Rock, AR, USA
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12
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Abstract
CONTEXT.— The steady rise in the incidence of cutaneous malignant melanoma and its inherently difficult-to-interpret histopathology continues to fuel an increasing demand for diagnostically and prognostically insightful adjunctive molecular tests among both clinicians and dermatopathologists. A number of DNA, RNA, and epigenetically based assays have now been developed and are at various stages of experimental and/or clinical use. OBJECTIVE.— To examine the evidence for the utility and limitations of these leading candidates for the diagnosis and risk stratification of melanoma and related melanocytic neoplasms. DATA SOURCES.— The available English medical literature was reviewed in the preparation of this manuscript. CONCLUSIONS.— Comparative genomic hybridization, fluorescence in situ hybridization, RNA-based gene expression profiling, and immunohistochemical assays for novel genetic and epigenetic markers will help bring diagnostic and prognostic accuracy to the assessment of melanocytic neoplasms.
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Affiliation(s)
- Jonathan J Lee
- From the Department of Dermatology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania (Dr Lee); and the Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts (Drs Lee and Lian)
| | - Christine G Lian
- From the Department of Dermatology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania (Dr Lee); and the Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts (Drs Lee and Lian)
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13
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Small and Isolated Immunohistochemistry-positive Cells in Melanoma Sentinel Lymph Nodes Are Associated With Disease-specific and Recurrence-free Survival Comparable to that of Sentinel Lymph Nodes Negative for Melanoma. Am J Surg Pathol 2019; 43:755-765. [DOI: 10.1097/pas.0000000000001229] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Siref AB, Huynh CAT, Balzer BL, Frishberg DP, Essner R, Shon W. Diagnostic utility of dual 5-hydroxymethylcytosine/Melan-A immunohistochemistry in differentiating nodal nevus from metastatic melanoma: An effective first-line test for the workup of sentinel lymph node specimen. J Cutan Pathol 2019; 46:261-266. [PMID: 30632191 DOI: 10.1111/cup.13412] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 12/13/2018] [Accepted: 12/23/2018] [Indexed: 12/24/2022]
Abstract
BACKGROUND Distinguishing benign nodal nevus from metastatic melanoma can be diagnostically challenging, with important clinical consequences. Recently, the loss of epigenetic marker, 5-hydroxymethylcytosine (5-hmC) expression by immunohistochemistry has been found in melanomas and atypical melanocytic neoplasms. METHODS About 41 metastatic melanomas and 20 nodal nevi were retrieved. Nuclear 5-hmC (brown) and cytoplasmic Melan-A Red (red) double immunohistochemical staining was performed. RESULTS Total or partial loss of nuclear expression of 5-hmC was noted in 40/41 metastatic melanomas; these tumor cells were strongly positive for Melan-A Red, except in one case of desmoplastic melanoma. All cases of nodal nevus showed uniformly retained nuclear expression of 5-hmC accompanied by strong Melan-A Red cytoplasmic staining. In two cases containing both nodal nevus and metastatic melanoma, all tumor cells were positive for Melan-A Red, but a nuclear expression of 5-hmC was selectively absent only in the melanoma tumor cells. CONCLUSION Dual 5-hmC/Melan-A Red immunohistochemistry is highly specific in distinguishing nodal nevus from metastatic melanoma. Our protocol for brown and red chromogens used in this study provides excellent color contrast and is easy to interpret. Furthermore, this dual staining method allows the preservation of limited tumor tissue, which could be used for potential molecular studies.
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Affiliation(s)
- Andrew B Siref
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Carissa A T Huynh
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Bonnie L Balzer
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - David P Frishberg
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Richard Essner
- Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Wonwoo Shon
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
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15
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Kim HJ, Seo JW, Roh MS, Lee JH, Song KH. Clinical features and prognosis of Asian patients with acral lentiginous melanoma who have nodal nevi in their sentinel lymph node biopsy specimen. J Am Acad Dermatol 2018; 79:706-713. [PMID: 29673774 DOI: 10.1016/j.jaad.2018.04.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/31/2018] [Accepted: 04/04/2018] [Indexed: 11/18/2022]
Abstract
BACKGROUND Nodal melanocytic nevi (NNs) encountered during sentinel lymph node biopsy (SLB) for malignant melanoma are usually difficult to distinguish from metastatic melanoma. However, NNs have not been well studied in acral lentiginous melanoma (ALM) in Asian populations. OBJECTIVE To investigate the clinical characteristics and significance of NNs in SLB specimens from patients with ALM. METHODS We retrospectively analyzed 84 patients with ALM who underwent SLB between June 2010 and July 2017. RESULTS Of the 84 patients with ALM, 9 (10.7%) had NNs in their SLB specimens. NNs were significantly more common in SLB specimens than in specimens not obtained by SLB. The presence of pre-existing melanocytic lesions was found to be associated with NNs (P < .001). The 5-year overall survival was significantly higher in patients with ALM with NNs than in patients with a positive SLB result (P = .047). Distant recurrence in patients with ALM with NNs was significantly lower than in patients a positive SLB result (P = .03). LIMITATIONS The small sample size, single-center study design, and retrospective nature of the study were the limitations. CONCLUSION In Asian populations, the prevalence of NNs in ALM is similar to that reported in Europe and the United States. The rates of distant recurrence and overall survival in patients with ALM who have NNs are similar to those of patients who do not have metastatic melanoma.
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Affiliation(s)
- Ho-Jin Kim
- Department of Dermatology, College of Medicine, Dong-A University, Busan, Republic of Korea
| | - Jeong-Wan Seo
- Department of Dermatology, College of Medicine, Dong-A University, Busan, Republic of Korea
| | - Mee-Sook Roh
- Department of Pathology, College of Medicine, Dong-A University, Busan, Republic of Korea
| | - Ji-Hyun Lee
- Department of Internal Medicine, College of Medicine, Dong-A University, Busan, Republic of Korea
| | - Ki-Hoon Song
- Department of Dermatology, College of Medicine, Dong-A University, Busan, Republic of Korea.
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16
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Saab J, Santos-Zabala ML, Loda M, Stack EC, Hollmann TJ. Fatty Acid Synthase and Acetyl-CoA Carboxylase Are Expressed in Nodal Metastatic Melanoma But Not in Benign Intracapsular Nodal Nevi. Am J Dermatopathol 2018; 40:259-264. [PMID: 28654463 PMCID: PMC6844149 DOI: 10.1097/dad.0000000000000939] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Melanoma is a potentially lethal form of skin cancer for which the current standard therapy is complete surgical removal of the primary tumor followed by sentinel lymph node biopsy when indicated. Histologic identification of metastatic melanoma in a sentinel node has significant prognostic and therapeutic implications, routinely guiding further surgical management with regional lymphadenectomy. While melanocytes in a lymph node can be identified by routine histopathologic and immunohistochemical examination, the distinction between nodal nevus cells and melanoma can be morphologically problematic. Previous studies have shown that malignant melanoma can over-express metabolic genes such as fatty acid synthase (FASN) and acetyl-CoA carboxylase (ACC). This immunohistochemical study aims to compare the utility of FASN and ACC in differentiating sentinel lymph nodes with metastatic melanomas from those with benign nodal nevi in patients with cutaneous melanoma. MATERIALS AND METHODS Using antibodies against FASN and ACC, 13 sentinel lymph nodes from 13 patients with metastatic melanoma and 14 lymph nodes harboring benign intracapsular nevi from 14 patients with cutaneous malignant melanoma were examined. A diagnosis of nodal melanoma was based on cytologic atypia and histologic comparison with the primary melanoma. All nodal nevi were intracapsular and not trabecular. Immunohistochemistry for Melan-A, S100, human melanoma black 45 (HMB45), FASN, and ACC were performed. The percentage of melanocytes staining with HMB45, FASN, and ACC was determined and graded in 25% increments; staining intensity was graded as weak, moderate, or strong. RESULTS All metastatic melanomas tested had at least 25% tumor cell staining for both FASN and ACC. Greater than 75% of the tumor cells stained with FAS in 7/13 cases and for ACC in 5/12 cases. Intensity of staining was variable; strong staining for FASN and ACC was observed in 69% and 50% of metastatic melanoma, respectively. HMB45 was negative in 40% of nodal melanoma cases all of which stained with FASN and ACC. Capsular nevi were uniformly negative for FASN, ACC, and HMB45 immunoreactivity. CONCLUSIONS All metastatic melanoma cases involving sentinel lymph nodes were positive for FASN and ACC while no staining was observed in intracapsular nevi. These findings suggest that FASN and ACC could be used as valuable ancillary stains in the distinction between nodal nevi and metastatic melanoma.
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Affiliation(s)
- Jad Saab
- Memorial Sloan Kettering Cancer Center, New York, NY
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17
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Abstract
Malignant melanoma is a highly aggressive neoplasia of melanocytic origin. In part because of the lack of effective treatment methods, the incidence and mortality rates of this disease continue to increase. Rapidly accumulating evidence suggests that dysregulation of epigenetic mechanisms, including DNA methylation/demethylation, chromatin modification, and remodeling, and diverse activities of noncoding RNAs, play a central role in the pathogenesis of melanoma. The epigenetic mark 5-hydroxymethylcytosine (5-hmC) has attracted interest since 2009, when it was shown that ten-eleven translocation proteins can enzymatically convert 5-methylcytosine into 5-hmC, a key intermediate of DNA demethylation. Factors that regulate DNA hydroxymethylation are frequently altered in cancer, leading to deregulation of 5-hmC levels. In this review, we will discuss the relationship between melanoma and DNA hydroxymethylation, the regulation of DNA hydroxymethylation, and defects in this pathway in melanoma.
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18
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Gong F, Guo Y, Niu Y, Jin J, Zhang X, Shi X, Zhang L, Li R, Chen L, Ma RZ. Epigenetic silencing of TET2 and TET3 induces an EMT-like process in melanoma. Oncotarget 2018; 8:315-328. [PMID: 27852070 PMCID: PMC5352122 DOI: 10.18632/oncotarget.13324] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 11/04/2016] [Indexed: 12/02/2022] Open
Abstract
Epithelial-Mesenchymal Transition (EMT) is a critical step in the progression of cancer. Malignant melanoma, a cancer developed from pigmented melanocytes, metastasizes through an EMT-like process. Ten-eleven translocation (TET) enzymes, catalyzing the conversion of 5-methylcytosine (5mC) to 5-hydroxylmethylcytosine (5-hmC), are down regulated in melanoma. However, their roles in the progression and the EMT-like process of melanoma are not fully understood. Here we report that DNA methylation induced silencing of TET2 and TET3 are responsible for the EMT-like process and the metastasis of melanoma. TET2 and TET3 are down regulated in the TGF-β1-induced EMT-like process, and the knocking down of TET2 or TET3 induced this EMT-like process. A DNA demethylating agent antagonized the TGF-β-induced suppression of TET2 and TET3. Furthermore, a ChIP analysis indicated that enhanced recruitment of DNMT3A (DNA Methyltransferase 3A) is the mechanism by which TGF-β induces the silencing of TET2 and TET3. Finally, the overexpression of the TET2 C-terminal sequence partially rescues the TGF-β1-induced EMT-like process in vitro and inhibits tumor growth and metastasis in vivo. Hence, our data suggest an epigenetic circuitry that mediates the EMT activated by TGF-β. As an effector, DNMT3A senses the TGF-β signal and silences TET2 and TET3 promoters to induce the EMT-like process and metastasis in melanoma.
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Affiliation(s)
- Fuxing Gong
- State Key Laboratory for Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.,Zhengzhou City Key Laboratory of Molecular Biology, Zhengzhou Normal University, Zhengzhou 450044, China.,University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Yu Guo
- State Key Laboratory for Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.,University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Yiqian Niu
- State Key Laboratory for Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.,University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Jiawei Jin
- State Key Laboratory for Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaojuan Zhang
- State Key Laboratory for Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaoqian Shi
- State Key Laboratory for Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.,University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Limeng Zhang
- Zhengzhou City Key Laboratory of Molecular Biology, Zhengzhou Normal University, Zhengzhou 450044, China
| | - Runting Li
- Zhengzhou City Key Laboratory of Molecular Biology, Zhengzhou Normal University, Zhengzhou 450044, China
| | - Longxin Chen
- Zhengzhou City Key Laboratory of Molecular Biology, Zhengzhou Normal University, Zhengzhou 450044, China
| | - Runlin Z Ma
- State Key Laboratory for Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.,Zhengzhou City Key Laboratory of Molecular Biology, Zhengzhou Normal University, Zhengzhou 450044, China.,University of the Chinese Academy of Sciences, Beijing 100101, China
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19
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Moran B, Silva R, Perry AS, Gallagher WM. Epigenetics of malignant melanoma. Semin Cancer Biol 2017; 51:80-88. [PMID: 29074395 DOI: 10.1016/j.semcancer.2017.10.006] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 10/12/2017] [Accepted: 10/20/2017] [Indexed: 01/18/2023]
Abstract
Patients with malignant melanoma generally have a good prognosis if the disease presents prior to metastasis. Due to progress with targeted and immunotherapies, the median survival of metastatic melanoma patients is now over 2 years. The disease is characterised by one of the highest somatic mutation rates observed amongst cancer types, with a specific mutational signature based on UV radiation damage evident. Highly prevalent mutations, such as the BRAFV600E, in the MAPK cascade indicate truncal involvement of this pathway in the earliest stage of melanoma. The molecular sub-classification of melanoma based on genetic alterations is now well established. This has paved the way for researchers in epigenetics to investigate specific pathways of known importance, and the involvement of the diverse range of epigenetic mechanisms. Herein, we review the literature to highlight that epigenetic alterations are integrally involved in this malignancy. We focus on the most current evidence around the epigenetic mechanisms: DNA methylation and demethylation including 5-hydroxy-methylcytosine; histone post-translational modifications including variant histones; chromatin remodelling complexes and in particular the polycomb-repressive complex PRC2 and its histone methyltransferase subunit EZH2; and non-coding RNAs. Each mechanism is described generally, studies involving melanoma are assessed and clinical relevance is highlighted where possible.
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Affiliation(s)
- Bruce Moran
- Cancer Biology and Therapeutics Laboratory, UCD School of Biomolecular and Biomedical Research, UCD Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland; OncoMark Limited, NovaUCD, Belfield Innovation Park, Dublin 4, Ireland
| | - Romina Silva
- Cancer Biology and Therapeutics Laboratory, UCD School of Biomolecular and Biomedical Research, UCD Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland; OncoMark Limited, NovaUCD, Belfield Innovation Park, Dublin 4, Ireland
| | - Antoinette S Perry
- Cancer Biology and Therapeutics Laboratory, UCD School of Biomolecular and Biomedical Research, UCD Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - William M Gallagher
- Cancer Biology and Therapeutics Laboratory, UCD School of Biomolecular and Biomedical Research, UCD Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland; OncoMark Limited, NovaUCD, Belfield Innovation Park, Dublin 4, Ireland.
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20
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Abstract
Melanoma is a malignant tumor of melanocytes and is considered to be the most aggressive cancer among all skin diseases. The pathogenesis of melanoma has not been well documented, which may restrict the research and development of biomarkers and therapies. To date, several genetic and epigenetic factors have been identified as contributing to the development and progression of melanoma. Besides the findings on genetic susceptibilities, the recent progress in epigenetic studies has revealed that loss of the DNA hydroxymethylation mark, 5-hydroxymethylcytosine (5-hmC), along with high levels of DNA methylation at promoter regions of several tumor suppressor genes in melanoma, may serve as biomarkers for melanoma. Moreover, 5-Aza-2′-deoxycytidine, an epigenetic modifier causing DNA demethylation, and ten-eleven translocation family dioxygenase (TET), which catalyzes the generation of 5-hmC, demonstrate therapeutic potential in melanoma treatment. In this review, we will summarize the latest progress in research on DNA methylation/hydroxymethylation in melanoma, and we will discuss and provide insight for epigenetic biomarkers and therapies for melanoma. Particularly, we will discuss the role of DNA hydroxymethylation in melanoma infiltrating immune cells, which may also serve as a potential target for melanoma treatment.
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21
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Micevic G, Theodosakis N, Bosenberg M. Aberrant DNA methylation in melanoma: biomarker and therapeutic opportunities. Clin Epigenetics 2017; 9:34. [PMID: 28396701 PMCID: PMC5381063 DOI: 10.1186/s13148-017-0332-8] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/24/2017] [Indexed: 12/18/2022] Open
Abstract
Aberrant DNA methylation is an epigenetic hallmark of melanoma, known to play important roles in melanoma formation and progression. Recent advances in genome-wide methylation methods have provided the means to identify differentially methylated genes, methylation signatures, and potential biomarkers. However, despite considerable effort and advances in cataloging methylation changes in melanoma, many questions remain unanswered. The aim of this review is to summarize recent developments, emerging trends, and important unresolved questions in the field of aberrant DNA methylation in melanoma. In addition to reviewing recent developments, we carefully synthesize the findings in an effort to provide a framework for understanding the current state and direction of the field. To facilitate clarity, we divided the review into DNA methylation changes in melanoma, biomarker opportunities, and therapeutic developments. We hope this review contributes to accelerating the utilization of the diagnostic, prognostic, and therapeutic potential of DNA methylation for the benefit of melanoma patients.
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Affiliation(s)
- Goran Micevic
- Department of Dermatology, Yale University School of Medicine, New Haven, CT 06520 USA.,Department of Pathology, Yale University School of Medicine, New Haven, CT 06520 USA
| | - Nicholas Theodosakis
- Department of Dermatology, Yale University School of Medicine, New Haven, CT 06520 USA.,Department of Pathology, Yale University School of Medicine, New Haven, CT 06520 USA
| | - Marcus Bosenberg
- Department of Dermatology, Yale University School of Medicine, New Haven, CT 06520 USA.,Department of Pathology, Yale University School of Medicine, New Haven, CT 06520 USA
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22
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Lee JJ, Vilain RE, Granter SR, Hu NR, Bresler SC, Xu S, Frank AH, Mihm MC, Saw RP, Fletcher CD, Scolyer RA, Murphy GF, Lian CG. 5-Hydroxymethylcytosine is a nuclear biomarker to assess biological potential in histologically ambiguous heavily pigmented melanocytic neoplasms. J Cutan Pathol 2017; 44:249-255. [DOI: 10.1111/cup.12880] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 11/03/2016] [Accepted: 12/26/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Jonathan J. Lee
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Ricardo E. Vilain
- Melanoma Institute Australia; North Sydney Australia
- Sydney Medical School; The University of Sydney; Sydney NSW Australia
- Tissue Pathology and Diagnostic Oncology; Royal Prince Alfred Hospital; Sydney NSW Australia
| | - Scott R. Granter
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Nina R. Hu
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Scott C. Bresler
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Shuyun Xu
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Alexander H. Frank
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Martin C. Mihm
- Department of Dermatology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Robyn P.M. Saw
- Melanoma Institute Australia; North Sydney Australia
- Sydney Medical School; The University of Sydney; Sydney NSW Australia
- Discipline of Surgery; Royal Prince Alfred Hospital; Sydney NSW Australia
| | - Christopher D. Fletcher
- Department of Pathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Richard A. Scolyer
- Melanoma Institute Australia; North Sydney Australia
- Sydney Medical School; The University of Sydney; Sydney NSW Australia
- Tissue Pathology and Diagnostic Oncology; Royal Prince Alfred Hospital; Sydney NSW Australia
| | - George F. Murphy
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Christine G. Lian
- Program in Dermatopathology; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
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23
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Saldanha G, Joshi K, Lawes K, Bamford M, Moosa F, Teo KW, Pringle JH. 5-Hydroxymethylcytosine is an independent predictor of survival in malignant melanoma. Mod Pathol 2017; 30:60-68. [PMID: 27713424 PMCID: PMC6176904 DOI: 10.1038/modpathol.2016.159] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 07/30/2016] [Indexed: 12/23/2022]
Abstract
Outcomes for melanoma patients vary within cancer stage. Prognostic biomarkers are potential adjuncts to provide more precise prognostic information. Simple, low-cost biomarker assays, such as those based on immunohistochemistry, have strong translational potential. 5-hydroxymethylcytosine (5 hmC) shows prognostic potential in melanoma but prior studies were small. We, therefore, analysed 5 hmC in a retrospective cohort to provide external validation of its prognostic value. Two hundred primary melanomas were evaluated for 5 hmC expression using immunohistochemistry. The primary objective was to assess the effect on overall survival while controlling for important confounders. Univariable and multivariable analyses were performed. REMARK guidelines were followed. The 5 hmC immunohistochemistry scoring showed very strong inter-observer agreement (ICC 0.88) and expression was significantly related to age, site, Breslow thickness, ulceration, mitotic rate, and stage. Kaplan-Meier analysis showed 5 hmC was associated with metastasis-free, melanoma-specific, and overall survival, P<0.0001 for each. In univariable Cox proportional hazards models, 5 hmC hazard ratios were significant and remained so in a multivariable model. A two-step cox model was created using stage and 5 hmC, as stage is the gold standard for clinical practice. The addition of 5 hmC produced significant improvement in the model and 5 hmC and stage were independent significant predictors. This is the largest study of the prognostic value of 5 hmC immunohistochemistry in melanoma. The 5 hmC scoring was easily and reproducibly performed and it was an independent predictor of metastasis-free survival, melanoma-specific survival, and overall survival. This work supports further development of 5 hmC as a prognostic biomarker and suggests that it could add more precision to American Joint Committee on Cancer staging.
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Affiliation(s)
- Gerald Saldanha
- Department of Cancer Studies, University of Leicester, Leicester Royal Infirmary, Leicester, UK
- EMPATH Department of Cellular Pathology, University Hospitals of Leicester, Leicester Royal Infirmary, Leicester, UK
| | - Kushal Joshi
- Department of Cancer Studies, University of Leicester, Leicester Royal Infirmary, Leicester, UK
| | - Kathryn Lawes
- EMPATH Department of Cellular Pathology, University Hospitals of Leicester, Leicester Royal Infirmary, Leicester, UK
| | - Mark Bamford
- EMPATH Department of Cellular Pathology, University Hospitals of Leicester, Leicester Royal Infirmary, Leicester, UK
| | - Farhaan Moosa
- Department of Cancer Studies, University of Leicester, Leicester Royal Infirmary, Leicester, UK
| | - Kah Wee Teo
- Department of Cancer Studies, University of Leicester, Leicester Royal Infirmary, Leicester, UK
| | - J Howard Pringle
- Department of Cancer Studies, University of Leicester, Leicester Royal Infirmary, Leicester, UK
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24
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Clinical significance of BRAF V600E mutational status in capsular nevi of sentinel lymph nodes in patients with primary cutaneous melanoma. Hum Pathol 2017; 59:48-54. [DOI: 10.1016/j.humpath.2016.09.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 09/01/2016] [Accepted: 09/02/2016] [Indexed: 01/20/2023]
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25
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Davis J, Patil J, Aydin N, Mishra A, Misra S. Capsular nevus versus metastatic malignant melanoma - a diagnostic dilemma. Int J Surg Case Rep 2016; 29:20-24. [PMID: 27810606 PMCID: PMC5094157 DOI: 10.1016/j.ijscr.2016.10.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 10/14/2016] [Accepted: 10/15/2016] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION A positive finding of metastatic melanoma in a sentinel lymph node is an ominous sign and a strong predictor of overall survival. In contrast, current data trends have shown that patients with benign nevus cells in the sentinel nodes do not require additional therapy since their prognosis has been shown to be similar to that of patients with negative lymph nodes. Distinguishing between benign capsular nevi and metastatic melanoma often proves to be diagnostically problematic. CASE PRESENTATION In this case report we present two cases of melanoma in which sentinel lymph node biopsies proved to be difficult in distinguishing metastatic melanocytes from capsular nevus cells. In both cases, further workup was necessary for accurate diagnoses. DISCUSSION A lack of standardized distinctions of benign nevus cell from melanoma pose a diagnostic pitfall. Assigning a diagnosis of malignant melanoma might seem like the safer approach to avoid a false negative, but the resultant treatment, including the possibility of additional surgical complications, may cause anxiety, discomfort, and financial instability for the patient. Current methods of distinguishing the two based solely on histology may be insufficient due to similar pathologic patterns. CONCLUSION To avoid misdiagnosing a patient and performing unnecessary therapy, it would be beneficial to get a second opinion by additional histopathologists at a high volume center. Additionally, immunohistochemical staining should be carefully employed due to some overlap in commonly used markers. Using tissue morphology in conjunction with immunohistochemical staining may be the best way to make the most accurate diagnosis.
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Affiliation(s)
- Justin Davis
- Texas Tech Health Sciences Center, Amarillo, TX, United States
| | | | - Nail Aydin
- Texas Tech Health Sciences Center, Amarillo, TX, United States
| | | | - Subhasis Misra
- Texas Tech Health Sciences Center, Amarillo, TX, United States.
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26
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Magotra M, Sakhdari A, Lee PJ, Tomaszewicz K, Dresser K, Hutchinson LM, Woda BA, Chen BJ. Immunohistochemical loss of 5-hydroxymethylcytosine expression in acute myeloid leukaemia: relationship to somatic gene mutations affecting epigenetic pathways. Histopathology 2016; 69:1055-1065. [PMID: 27458708 DOI: 10.1111/his.13046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 07/22/2016] [Indexed: 12/17/2022]
Abstract
AIMS Genes affecting epigenetic pathways are frequently mutated in myeloid malignancies, including acute myeloid leukaemia (AML). The genes encoding TET2, IDH1 and IDH2 are among the most commonly mutated genes, and cause defective conversion of 5-methylcytosine into 5-hydroxymethylcytosine (5hmC), impairing demethylation of DNA, and presumably serving as driver mutations in leukaemogenesis. The aim of this study was to correlate 5hmC immunohistochemical loss with the mutation status of genes involved in epigenetic pathways in AML. METHODS AND RESULTS Immunohistochemical staining with an anti-5hmC antibody was performed on 41 decalcified, formalin-fixed paraffin-embedded (FFPE) bone marrow biopsies from patients with AML. Archived DNA was subjected to next-generation sequencing for analysis of a panel of genes, including TET2, IDH1, IDH2, WT1 and DNMT3A. TET2, IDH1, IDH2, WT1 and DNMT3A mutations were found in 46% (19/41) of the cases. Ten of 15 cases (67%) with TET2, IDH1, IDH2 or WT1 mutations showed deficient 5hmC staining, whereas nine of 26 cases (35%) without a mutation in these genes showed loss of 5hmC. It is of note that all four cases with TET2 mutations showed deficient 5hmC staining. CONCLUSIONS Overall, somatic mutations in TET2, IDH1, IDH2, WT1 and DNMT3A were common in our cohort of AML cases. Immunohistochemical staining for 5hmC was lost in the majority of cases harbouring mutations in these genes, reflecting the proposed relationship between dysfunctional epigenetic pathways and leukaemogenesis.
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Affiliation(s)
- Minoti Magotra
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
| | - Ali Sakhdari
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
| | - Paul J Lee
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
| | - Keith Tomaszewicz
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
| | - Karen Dresser
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
| | - Lloyd M Hutchinson
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
| | - Bruce A Woda
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
| | - Benjamin J Chen
- Department of Pathology, University of Massachusetts Memorial Medical Center and University of Massachusetts Medical School, Worcester, MA, USA
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27
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Gomes CBF, Zechin KG, Xu S, Stelini RF, Nishimoto IN, Zhan Q, Xu T, Qin G, Treister NS, Murphy GF, Lian CG. TET2 Negatively Regulates Nestin Expression in Human Melanoma. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 186:1427-34. [PMID: 27102770 PMCID: PMC4901139 DOI: 10.1016/j.ajpath.2016.01.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 01/09/2016] [Accepted: 01/27/2016] [Indexed: 01/31/2023]
Abstract
Although melanoma is an aggressive cancer, the understanding of the virulence-conferring pathways involved remains incomplete. We have demonstrated that loss of ten-eleven translocation methylcytosine dioxygenase (TET2)-mediated 5-hydroxymethylcytosine (5-hmC) is an epigenetic driver of melanoma growth and a biomarker of clinical virulence. We also have determined that the intermediate filament protein nestin correlates with tumorigenic and invasive melanoma growth. Here we examine the relationships between these two biomarkers. Immunohistochemistry staining of nestin and 5-hmC in 53 clinically annotated primary and metastatic patient melanomas revealed a significant negative correlation. Restoration of 5-hmC, as assessed in a human melanoma cell line by introducing full-length TET2 and TET2-mutated constructs, decreased nestin gene and protein expression in vitro. Genome-wide mapping using hydroxymethylated DNA immunoprecipitation sequencing disclosed significantly less 5-hmC binding in the 3' untranslated region of the nestin gene in melanoma compared to nevi, and 5-hmC binding in this region was significantly increased after TET2 overexpression in human melanoma cells in vitro. Our findings provide evidence suggesting that nestin regulation is negatively controlled epigenetically by TET2 via 5-hmC binding at the 3' untranslated region of the nestin gene, providing one potential pathway for understanding melanoma growth characteristics. Studies are now indicated to further define the interplay between 5-hmC, nestin expression, and melanoma virulence.
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Affiliation(s)
- Camilla B F Gomes
- Program in Oral Pathology, Department of Oral Diagnosis, School of Dentistry, University of Campinas, Piracicaba, Brazil; Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Karina G Zechin
- Program in Oral Pathology, Department of Oral Diagnosis, School of Dentistry, University of Campinas, Piracicaba, Brazil
| | - Shuyun Xu
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Rafael F Stelini
- Department of Pathology, Medical Sciences School, University of Campinas, Piracicaba, Brazil
| | - Ines N Nishimoto
- Department of Head and Surgery and Otorhinolaryngology, A.C. Camargo Cancer Center, São Paulo, Brazil
| | - Qian Zhan
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Ting Xu
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Gungwei Qin
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Nathaniel S Treister
- Division of Oral Medicine and Dentistry, Brigham and Women's Hospital, Harvard School of Dental Medicine, Boston, Massachusetts
| | - George F Murphy
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
| | - Christine G Lian
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
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28
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Abstract
Melanoma, one of the most virulent forms of human malignancy, is the primary cause of mortality from cancers arising from the skin. The prognosis of metastatic melanoma remains dismal despite targeted therapeutic regimens that exploit our growing understanding of cancer immunology and genetic mutations that drive oncogenic cell signaling pathways in cancer. Epigenetic mechanisms, including DNA methylation/demethylation, histone modifications and noncoding RNAs recently have been shown to play critical roles in melanoma pathogenesis. Current evidence indicates that imbalance of DNA methylation and demethylation, dysregulation of histone modification and chromatin remodeling, and altered translational control by noncoding RNAs contribute to melanoma tumorigenesis. Here, we summarize the most recent insights relating to epigenetic markers, focusing on diagnostic potential as well as novel therapeutic approaches for more effective treatment of advanced melanoma.
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Affiliation(s)
- Weimin Guo
- Program in Dermatopathology, Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA
| | - Ting Xu
- Program in Dermatopathology, Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA
| | - Jonathan J Lee
- Program in Dermatopathology, Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA
| | - George F Murphy
- Program in Dermatopathology, Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA
| | - Christine G Lian
- Program in Dermatopathology, Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA
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Lee JJ, Cook M, Mihm MC, Xu S, Zhan Q, Wang TJ, Murphy GF, Lian CG. Loss of the epigenetic mark, 5-Hydroxymethylcytosine, correlates with small cell/nevoid subpopulations and assists in microstaging of human melanoma. Oncotarget 2015; 6:37995-8004. [PMID: 26462027 PMCID: PMC4741979 DOI: 10.18632/oncotarget.6062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 09/24/2015] [Indexed: 01/19/2023] Open
Abstract
Melanomas in the vertical growth phase (VGP) not infrequently demonstrate cellular heterogeneity. One commonly encountered subpopulation displays small cell/nevoid morphology. Although its significance remains unknown, such subpopulations may pose diagnostic issues when faced with differentiating such changes from associated nevus or mistaking such regions for nevic maturation (pseudomaturation). That 'loss' of the epigenetic biomarker, 5-hydroxymethylcytosine (5-hmC), is a hallmark for melanoma and correlates with virulence prompted us to explore the diagnostic utility and biological implications of 5-hmC immunohistochemistry (IHC) in melanomas with small cell/nevoid subpopulations. Fifty-two cases were included in this study, including melanomas with small cell/nevoid subpopulations (MSCN) or melanomas with pre-existing nevus (MPEN). Semiquantitative and computer-validated immunohistochemical analyses revealed invariable, uniform loss of 5-hmC in the conventional melanoma component. By contrast, the nevic components in MPEN cases demonstrated strong nuclear immunopositivity. In MSCN cases, there was partial to complete loss of 5-hmC restricted to these nevoid areas. Based on recent data supporting tight correlation between 5-hmC loss and malignancy, our findings indicate a potential 'intermediate' biological nature for small cell/nevoid subpopulations. Because 5-hmC assisted in differentiating such regions from associated nevus, the use of 5-hmC as an adjunct to microstaging in difficult cases showing VGP heterogeneity should be further explored.
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Affiliation(s)
- Jonathan J. Lee
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Martin Cook
- Department of Histopathology, Royal Surrey County Hospital, Guildford, United Kingdom
- Cancer Research UK, Manchester Institute, Manchester, United Kingdom
| | - Martin C. Mihm
- Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Shuyun Xu
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Qian Zhan
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Thomas J. Wang
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - George F. Murphy
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Christine G. Lian
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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Rodić N, Zampella J, Sharma R, Burns KH, Taube JM. Diagnostic utility of 5-hydroxymethylcytosine immunohistochemistry in melanocytic proliferations. J Cutan Pathol 2015; 42:807-14. [PMID: 26239102 DOI: 10.1111/cup.12564] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 07/21/2015] [Accepted: 07/25/2015] [Indexed: 01/01/2023]
Abstract
Decreased hydroxymethylated cytosine (5-hydroxymethycytosine, 5-hmC) is reported to correlate with melanocyte dysplasia. The purpose of this study was to assess the diagnostic utility of this observation. 5-hmC immunohistochemistry was performed on tissue microarrays containing 171-melanocytic lesions from two different institutions. An immunohistochemical staining score representing the percentage and intensity of nuclear staining was assigned. The performance characteristics of 5-hmC immunohistochemistry for discriminating between a nevus and melanoma were determined. Additional cases of melanoma arising in a nevus (n = 8), nodal nevi (n = 5) and melanoma micrometastases to a lymph node (n = 6) were also assessed. Pronounced 5-hmC loss was observed in melanomas when compared with nevi (mean ± standard deviation = 6.71 ± 11.78 and 55.19 ± 23.66, respectively, p < 0.0001). While the mean immunohistochemical staining score values for melanocytic nevi and melanoma were distinct, there was considerable variability in immunohistochemical staining score within a single diagnostic category. The sensitivity and specificity of this assay for nevus vs. melanoma is 92.74 and 97.78%, respectively. Distinct biphasic staining patterns were observed in cases of melanoma arising in association with a nevus. Relative changes of 5-hmC expression within a single lesion may be more informative than absolute values when using 5-hmC as a diagnostic adjunct.
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Affiliation(s)
- Nemanja Rodić
- Department of Pathology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA
| | - John Zampella
- Department of Dermatology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA
| | - Reema Sharma
- Department of Pathology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA
| | - Kathleen H Burns
- Department of Pathology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA.,Department of Oncology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA.,The High Throughput Biology Center, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA
| | - Janis M Taube
- Department of Pathology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA.,Department of Dermatology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA.,Department of Oncology, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA
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31
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Lee JJ, Sholl LM, Lindeman NI, Granter SR, Laga AC, Shivdasani P, Chin G, Luke JJ, Ott PA, Hodi FS, Mihm MC, Lin JY, Werchniak AE, Haynes HA, Bailey N, Liu R, Murphy GF, Lian CG. Targeted next-generation sequencing reveals high frequency of mutations in epigenetic regulators across treatment-naïve patient melanomas. Clin Epigenetics 2015; 7:59. [PMID: 26221190 PMCID: PMC4517542 DOI: 10.1186/s13148-015-0091-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 05/27/2015] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Recent developments in genomic sequencing have advanced our understanding of the mutations underlying human malignancy. Melanoma is a prototype of an aggressive, genetically heterogeneous cancer notorious for its biologic plasticity and predilection towards developing resistance to targeted therapies. Evidence is rapidly accumulating that dysregulated epigenetic mechanisms (DNA methylation/demethylation, histone modification, non-coding RNAs) may play a central role in the pathogenesis of melanoma. Therefore, we sought to characterize the frequency and nature of mutations in epigenetic regulators in clinical, treatment-naïve, patient melanoma specimens obtained from one academic institution. RESULTS Targeted next-generation sequencing for 275 known and investigative cancer genes (of which 41 genes, or 14.9 %, encoded an epigenetic regulator) of 38 treatment-naïve patient melanoma samples revealed that 22.3 % (165 of 740) of all non-silent mutations affected an epigenetic regulator. The most frequently mutated genes were BRAF, MECOM, NRAS, TP53, MLL2, and CDKN2A. Of the 40 most commonly mutated genes, 12 (30.0 %) encoded epigenetic regulators, including genes encoding enzymes involved in histone modification (MECOM, MLL2, SETD2), chromatin remodeling (ARID1B, ARID2), and DNA methylation and demethylation (TET2, IDH1). Among the 38 patient melanoma samples, 35 (92.1 %) harbored at least one mutation in an epigenetic regulator. The genes with the highest number of total UVB-signature mutations encoded epigenetic regulators, including MLL2 (100 %, 16 of 16) and MECOM (82.6 %, 19 of 23). Moreover, on average, epigenetic genes harbored a significantly greater number of UVB-signature mutations per gene than non-epigenetic genes (3.7 versus 2.4, respectively; p = 0.01). Bioinformatics analysis of The Cancer Genome Atlas (TCGA) melanoma mutation dataset also revealed a frequency of mutations in the 41 epigenetic genes comparable to that found within our cohort of patient melanoma samples. CONCLUSIONS Our study identified a high prevalence of somatic mutations in genes encoding epigenetic regulators, including those involved in DNA demethylation, histone modification, chromatin remodeling, and microRNA processing. Moreover, UVB-signature mutations were found more commonly among epigenetic genes than in non-epigenetic genes. Taken together, these findings further implicate epigenetic mechanisms, particularly those involving the chromatin-remodeling enzyme MECOM/EVI1 and histone-modifying enzyme MLL2, in the pathobiology of melanoma.
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Affiliation(s)
- Jonathan J. Lee
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Lynette M. Sholl
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Neal I. Lindeman
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Scott R. Granter
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Alvaro C. Laga
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Priyanka Shivdasani
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Gary Chin
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Jason J. Luke
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - Patrick A. Ott
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - F. Stephen Hodi
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - Martin C. Mihm
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - Jennifer Y. Lin
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - Andrew E. Werchniak
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - Harley A. Haynes
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - Nancy Bailey
- />Melanoma Center, Dana–Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Boston, MA 02215-5450 USA
| | - Robert Liu
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - George F. Murphy
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
| | - Christine G. Lian
- />Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, 221 Longwood Avenue, EBRC Suite 401, Boston, MA 02115 USA
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Compton LA, Murphy GF, Lian CG. Diagnostic Immunohistochemistry in Cutaneous Neoplasia: An Update. Dermatopathology (Basel) 2015; 2:15-42. [PMID: 27047932 PMCID: PMC4816435 DOI: 10.1159/000377698] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Immunohistochemistry (IHC) is an important adjunct in the diagnosis of neoplastic skin diseases. In addition to the many established IHC markers currently in use, new markers continue to emerge, although their general acceptance and routine application requires robust validation. Here, we summarize the most well-established and commonly used biomarkers along with an array of newer ones reported in the past several decades that either demonstrate or hold high clinical promise in the field of cutaneous pathology. We also highlight recent applications of novel IHC markers in melanoma diagnosis including genetic mutation status markers [e.g. BRAF (v-raf murine sarcoma viral oncogene homolog B) and NRAS (neuroblastoma RAS viral oncogene homolog)] and an epigenetic alteration marker (e.g. 5-hydroxymethylcytosine). We specifically focus on the role of IHC in the differential diagnosis of cutaneous lesions that fall under the following categories: melanoma, epidermal tumors with an intraepidermal epitheliomatous pattern, spindle cell lesions of the dermis, small round blue cell tumors of the dermis, and cutaneous adnexal tumors. While IHC is a valuable tool in diagnostic dermatopathology, marker selection and interpretation must be highly informed by clinical context and the histologic differential diagnosis. With rapid progress in our understanding of the genetic and epigenetic mechanisms of tumorigenesis, new IHC markers will continue to emerge in the field of diagnostic dermatopathology.
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Affiliation(s)
- Leigh A Compton
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass., USA
| | - George F Murphy
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass., USA
| | - Christine G Lian
- Program in Dermatopathology, Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass., USA
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Vasanthakumar A, Godley LA. 5-hydroxymethylcytosine in cancer: significance in diagnosis and therapy. Cancer Genet 2015; 208:167-77. [PMID: 25892122 DOI: 10.1016/j.cancergen.2015.02.009] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 02/19/2015] [Accepted: 02/20/2015] [Indexed: 12/22/2022]
Abstract
Emerging data have demonstrated that 5-methylcytosine (5-mC) and its oxidized products 5-hydroxymethylcytosine (5-hmC), 5-formylcytosine (5-fC), and 5-carboxylcytosine (5-CaC) play unique roles in several biological processes, including the control of gene expression and in the pathogenesis of cancer. In this review, we focus on 5-hmC and the disruption of its distribution in several cancers, including hematological malignancies and solid tumors. We present an outline of how 5-hmC is closely associated with metabolic pathways and may be the missing link connecting epigenetics with metabolism in the context of cancer cells. Finally, we discuss the diagnostic and prognostic importance of 5-mC and 5-hmC patterning, and how we may be able to establish new paradigms in cancer therapy based on these alterations.
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Affiliation(s)
- Aparna Vasanthakumar
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA
| | - Lucy A Godley
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA.
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