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Singh G, Savage NM, Bollag RJ, Booker D. Pathology Job Search and Interview: Perspectives on the United States Experience. Arch Pathol Lab Med 2023; 147:1340-1343. [PMID: 36602893 DOI: 10.5858/arpa.2022-0247-ep] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2022] [Indexed: 01/06/2023]
Abstract
CONTEXT.— Pathology training is focused on the attainment of clinical, diagnostic, and administrative skills. Preparation for employment search and the interview process are often neglected. Given that a near majority of pathology trainees in the United States are graduates of foreign medical schools, training in the job search and interview process according to local customs, norms, and expectations has greater salience for individuals new to the United States. OBJECTIVE.— To offer perspectives on 2 components of the job search process: (1) finding a suitable job opening in academic and private practice settings and (2) preparing for an interview. We have provided a set of common interview questions and suggested preparatory methodology. The differences in the process and expectations in academic settings and private practice operations are highlighted. Engaging in the job search process early and networking are emphasized. We have also suggested approaches for pathology teachers and mentors in guiding trainees in a job search and preparation for an interview. DATA SOURCES.— The information and opinions expressed in this communication are based on the personal experiences of 4 senior pathologists in academic and private practice settings. CONCLUSIONS.— Start networking early. Leverage contacts with teachers, attending pathologists, senior residents, and people at national meetings to locate appropriate job opportunities. Seek assistance from attending pathologists in preparing a curriculum vitae and cover letter. Prepare for the questions that may come up in an interview. A dress rehearsal for an interview is strongly recommended.
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Affiliation(s)
- Gurmukh Singh
- From the Department of Pathology, Medical College of Georgia at Augusta University, Augusta (Singh, Savage, Bollag)
| | - Natasha M Savage
- From the Department of Pathology, Medical College of Georgia at Augusta University, Augusta (Singh, Savage, Bollag)
| | - Roni J Bollag
- From the Department of Pathology, Medical College of Georgia at Augusta University, Augusta (Singh, Savage, Bollag)
| | - David Booker
- Department of Pathology, Union General Hospital Laboratory, Chatuge Regional Hospital Laboratory, Stephens County Hospital Laboratory, Blairsville, Georgia (Booker)
- BasePath LLC, Blairsville, Georgia (Booker)
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Vergara-Lluri M, Kovach AE, Nakashima MO, Bradley KT, Mahe E, Tsao L, Savage NM, Salansky SA, Long T, Perkins SL, Hsi ED, Pozdnyakova O, Bhargava P. Significant Variability in the Identification and Reporting of Band Neutrophils by Participants Enrolled in the College of American Pathologists Proficiency Testing Program: Time for a Change. Arch Pathol Lab Med 2023:495408. [PMID: 37638547 DOI: 10.5858/arpa.2023-0015-cp] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2023] [Indexed: 08/29/2023]
Abstract
CONTEXT.— Increased band neutrophils in blood smear differential counts ("bandemia") are entrenched in medicine as a flag for sepsis. However, laboratory hematology experts have long advocated for discontinuation of reporting bands separately from segmented neutrophils because of poor sensitivity and specificity, poor interobserver agreement, and availability of alternative biomarkers for sepsis. OBJECTIVE.— To describe band neutrophil reporting practices and reproducibility of band classification among laboratories participating in the College of American Pathologists (CAP) proficiency testing (PT) program. DESIGN.— A survey questionnaire was distributed to hematology PT participants. A subsequent morphologic challenge included 12 preselected cell identifications of segmented neutrophils, bands, and metamyelocytes, and a 100-cell manual differential count of a digitally scanned blood smear. RESULTS.— Among laboratories that reported manual differentials, most respondents reported bands (4554 of 5268; 86.4%). Only 3222 of 4412 respondents (73.0%) provided band reference ranges. Though participants classified "easy" band neutrophils well (78.0%-98.3%), categorization of cell identifications for "moderate" and "difficult" bands was poor (3.1%-39.0% of laboratories), with classification instead as segmented neutrophils. This pattern was seen regardless of laboratory demographic characteristics. Marked variability in band counts was observed on the 100-cell differential count for both CAP PT participants and CAP Hematology and Clinical Microscopy Committee (HCMC) members (coefficients of variation, 55.8% and 32.9%, respectively). Variability was significantly improved when segmented and band neutrophils were grouped together (coefficients of variation, 6.2% and 5.0%, respectively). CONCLUSIONS.— Most CAP PT-participating laboratories report band counts, many without reference ranges. The survey confirms significant interlaboratory variability of band enumeration when bands are separately identified from segmented neutrophils. This study reaffirms the CAP Hematology and Clinical Microscopy Committee's strong recommendation to group segmented and band neutrophils together in manual differential counts.
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Affiliation(s)
- Maria Vergara-Lluri
- From the Department of Pathology and Laboratory Medicine, Los Angeles General Medical Center, Keck School of Medicine of University of Southern California, Los Angeles (Vergara-Lluri)
| | - Alexandra E Kovach
- The Department of Pathology and Laboratory Medicine, Children's Hospital of Los Angeles, Los Angeles, California (Kovach)
- The Keck School of Medicine of University of Southern California, Los Angeles (Kovach)
| | - Megan O Nakashima
- The Department of Laboratory Medicine, Cleveland Clinic, Cleveland, Ohio (Nakashima)
| | - Kyle T Bradley
- The Department of Pathology and Laboratory Medicine, Emory University Hospital, Atlanta, Georgia (Bradley)
| | - Etienne Mahe
- The Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada (Mahe)
| | - Lawrence Tsao
- The Department of Pathology, CareMount Medical, Mt Kisco, New York (Tsao)
| | - Natasha M Savage
- The Department of Pathology, Medical College of Georgia, Augusta (Savage)
| | - Stephanie A Salansky
- Proficiency Testing (Salansky), College of American Pathologists, Northfield, Illinois
| | - Thomas Long
- The Department of Biostatistics (Long), College of American Pathologists, Northfield, Illinois
| | - Sherrie L Perkins
- The Department of Pathology, University of Utah, Salt Lake City (Perkins)
| | - Eric D Hsi
- The Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, North Carolina (Hsi)
| | - Olga Pozdnyakova
- The Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts (Pozdnyakova)
| | - Parul Bhargava
- The Department of Laboratory Medicine, University of California, San Francisco (Bhargava)
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Sahajpal NS, Mondal AK, Vashisht A, Singh H, Pang AWC, Saul D, Nivin O, Hilton B, DuPont BR, Kota V, Savage NM, Hastie AR, Chaubey A, Kolhe R. Optical Genome Mapping: Integrating Structural Variations for Precise Homologous Recombination Deficiency Score Calculation. Genes (Basel) 2023; 14:1683. [PMID: 37761823 PMCID: PMC10530691 DOI: 10.3390/genes14091683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/11/2023] [Accepted: 08/21/2023] [Indexed: 09/29/2023] Open
Abstract
Homologous recombination deficiency (HRD) is characterized by the inability of a cell to repair the double-stranded breaks using the homologous recombination repair (HRR) pathway. The deficiency of the HRR pathway results in defective DNA repair, leading to genomic instability and tumorigenesis. The presence of HRD has been found to make tumors sensitive to ICL-inducing platinum-based therapies and poly(adenosine diphosphate [ADP]-ribose) polymerase (PARP) inhibitors (PARPi). However, there are no standardized methods to measure and report HRD phenotypes. Herein, we compare optical genome mapping (OGM), chromosomal microarray (CMA), and a 523-gene NGS panel for HRD score calculations. This retrospective study included the analysis of 196 samples, of which 10 were gliomas, 176 were hematological malignancy samples, and 10 were controls. The 10 gliomas were evaluated with both CMA and OGM, and 30 hematological malignancy samples were evaluated with both the NGS panel and OGM. To verify the scores in a larger cohort, 135 cases were evaluated with the NGS panel and 71 cases with OGM. The HRD scores were calculated using a combination of three HRD signatures that included loss of heterozygosity (LOH), telomeric allelic imbalance (TAI), and large-scale transitions (LST). In the ten glioma cases analyzed with OGM and CMA using the same DNA (to remove any tumor percentage bias), the HRD scores (mean ± SEM) were 13.2 (±4.2) with OGM compared to 3.7 (±1.4) with CMA. In the 30 hematological malignancy cases analyzed with OGM and the 523-gene NGS panel, the HRD scores were 7.6 (±2.2) with OGM compared to 2.6 (±0.8) with the 523-gene NGS panel. OGM detected 70.8% and 66.8% of additional variants that are considered HRD signatures in gliomas and hematological malignancies, respectively. The higher sensitivity of OGM to capture HRD signature variants might enable a more accurate and precise correlation with response to PARPi and platinum-based drugs. This study reveals HRD signatures that are cryptic to current standard of care (SOC) methods used for assessing the HRD phenotype and presents OGM as an attractive alternative with higher resolution and sensitivity to accurately assess the HRD phenotype.
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Affiliation(s)
| | - Ashis K. Mondal
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (A.K.M.); (A.V.); (H.S.); (O.N.); (N.M.S.)
| | - Ashutosh Vashisht
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (A.K.M.); (A.V.); (H.S.); (O.N.); (N.M.S.)
| | - Harmanpreet Singh
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (A.K.M.); (A.V.); (H.S.); (O.N.); (N.M.S.)
| | - Andy Wing Chun Pang
- Bionano Genomics, San Diego, CA 92121, USA; (A.W.C.P.); (D.S.); (A.R.H.); (A.C.)
| | - Daniel Saul
- Bionano Genomics, San Diego, CA 92121, USA; (A.W.C.P.); (D.S.); (A.R.H.); (A.C.)
| | - Omar Nivin
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (A.K.M.); (A.V.); (H.S.); (O.N.); (N.M.S.)
| | - Benjamin Hilton
- Greenwood Genetic Center, Greenwood, SC 29646, USA; (N.S.S.); (B.H.); (B.R.D.)
| | - Barbara R. DuPont
- Greenwood Genetic Center, Greenwood, SC 29646, USA; (N.S.S.); (B.H.); (B.R.D.)
| | - Vamsi Kota
- Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
| | - Natasha M. Savage
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (A.K.M.); (A.V.); (H.S.); (O.N.); (N.M.S.)
| | - Alex R. Hastie
- Bionano Genomics, San Diego, CA 92121, USA; (A.W.C.P.); (D.S.); (A.R.H.); (A.C.)
| | - Alka Chaubey
- Bionano Genomics, San Diego, CA 92121, USA; (A.W.C.P.); (D.S.); (A.R.H.); (A.C.)
| | - Ravindra Kolhe
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (A.K.M.); (A.V.); (H.S.); (O.N.); (N.M.S.)
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Sahajpal NS, Mondal AK, Singh H, Vashisht A, Ananth S, Saul D, Hastie AR, Hilton B, DuPont BR, Savage NM, Kota V, Chaubey A, Cortes JE, Kolhe R. Clinical Utility of Optical Genome Mapping and 523-Gene Next Generation Sequencing Panel for Comprehensive Evaluation of Myeloid Cancers. Cancers (Basel) 2023; 15:3214. [PMID: 37370824 DOI: 10.3390/cancers15123214] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 05/22/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023] Open
Abstract
The standard-of-care (SOC) for genomic testing of myeloid cancers primarily relies on karyotyping/fluorescent in situ hybridization (FISH) (cytogenetic analysis) and targeted gene panels (usually ≤54 genes) that harbor hotspot pathogenic variants (molecular genetic analysis). Despite this combinatorial approach, ~50% of myeloid cancer genomes remain cytogenetically normal, and the limited sequencing variant profiles obtained from targeted panels are unable to resolve the molecular etiology of many myeloid tumors. In this study, we evaluated the performance and clinical utility of combinatorial use of optical genome mapping (OGM) and a 523-gene next-generation sequencing (NGS) panel for comprehensive genomic profiling of 30 myeloid tumors and compared it to SOC cytogenetic methods (karyotyping and FISH) and a 54-gene NGS panel. OGM and the 523-gene NGS panel had an analytical concordance of 100% with karyotyping, FISH, and the 54-gene panel, respectively. Importantly, the IPSS-R cytogenetic risk group changed from very good/good to very poor in 22% of MDS (2/9) cases based on comprehensive profiling (karyotyping, FISH, and 54-gene panel vs. OGM and 523-gene panel), while additionally identifying six compound heterozygous events of potential clinical relevance in six cases (6/30, 20%). This cost-effective approach of using OGM and a 523-gene NGS panel for comprehensive genomic profiling of myeloid cancers demonstrated increased yield of actionable targets that can potentially result in improved clinical outcomes.
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Affiliation(s)
| | - Ashis K Mondal
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Harmanpreet Singh
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Ashutosh Vashisht
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Sudha Ananth
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Daniel Saul
- Bionano Genomics Inc., San Diego, CA 92121, USA
| | | | | | | | - Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Vamsi Kota
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | | | - Jorge E Cortes
- Department of Medicine, Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Ravindra Kolhe
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
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Klement JD, Redd PS, Lu C, Merting AD, Poschel DB, Yang D, Savage NM, Zhou G, Munn DH, Fallon PG, Liu K. Tumor PD-L1 engages myeloid PD-1 to suppress type I interferon to impair cytotoxic T lymphocyte recruitment. Cancer Cell 2023; 41:620-636.e9. [PMID: 36917954 PMCID: PMC10150625 DOI: 10.1016/j.ccell.2023.02.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 10/05/2022] [Accepted: 02/07/2023] [Indexed: 03/14/2023]
Abstract
The cellular and molecular mechanisms underlying tumor cell PD-L1 (tPD-L1) function in tumor immune evasion are incompletely understood. We report here that tPD-L1 does not suppress cytotoxic T lymphocyte (CTL) activity in co-cultures of tumor cells and tumor-specific CTLs and exhibits no effect on primary tumor growth. However, deleting tPD-L1 decreases lung metastasis in a CTL-dependent manner in tumor-bearing mice. Depletion of myeloid cells or knocking out PD-1 in myeloid cells (mPD-1) impairs tPD-L1 promotion of tumor lung metastasis in mice. Single-cell RNA sequencing (scRNA-seq) reveals that tPD-L1 engages mPD-1 to activate SHP2 to antagonize the type I interferon (IFN-I) and STAT1 pathway to repress Cxcl9 and impair CTL recruitment to lung metastases. Human cancer patient response to PD-1 blockade immunotherapy correlates with IFN-I response in myeloid cells. Our findings determine that tPD-L1 engages mPD-1 to activate SHP2 to suppress the IFN-I-STAT1-CXCL9 pathway to impair CTL tumor recruitment in lung metastasis.
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Affiliation(s)
- John D Klement
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Priscilla S Redd
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Chunwan Lu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Alyssa D Merting
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Dakota B Poschel
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Dafeng Yang
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta, GA 30912, USA
| | - Gang Zhou
- Georgia Cancer Center, Augusta, GA 30912, USA
| | | | - Padraic G Fallon
- Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin, Dublin, Ireland
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA.
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Poschel DB, Kehinde-Ige M, Klement JD, Yang D, Merting AD, Savage NM, Shi H, Liu K. IRF8 Regulates Intrinsic Ferroptosis through Repressing p53 Expression to Maintain Tumor Cell Sensitivity to Cytotoxic T Lymphocytes. Cells 2023; 12:310. [PMID: 36672246 PMCID: PMC9856547 DOI: 10.3390/cells12020310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/07/2023] [Accepted: 01/10/2023] [Indexed: 01/18/2023] Open
Abstract
Ferroptosis has emerged as a cytotoxic T lymphocyte (CTL)-induced tumor cell death pathway. The regulation of tumor cell sensitivity to ferroptosis is incompletely understood. Here, we report that interferon regulatory factor 8 (IRF8) functions as a regulator of tumor cell intrinsic ferroptosis. Genome-wide gene expression profiling identified the ferroptosis pathway as an IRF8-regulated pathway in tumor cells. IRF8.KO tumor cells acquire resistance to intrinsic ferroptosis induction and IRF8-deficient tumor cells also exhibit decreased ferroptosis in response to tumor-specific CTLs. Irf8 deletion increased p53 expression in tumor cells and knocking out p53 in IRF8.KO tumor cells restored tumor cell sensitivity to intrinsic ferroptosis induction. Furthermore, IRF8.KO tumor cells grew significantly faster than WT tumor cells in immune-competent mice. To restore IRF8 expression in tumor cells, we designed and synthesized codon usage-optimized IRF8-encoding DNA to generate IRF8-encoding plasmid NTC9385R-mIRF8. Restoring IRF8 expression via a lipid nanoparticle-encapsulated NTC9385R-mIRF8 plasmid therapy suppressed established tumor growth in vivo. In human cancer patients, nivolumab responders have a significantly higher IRF8 expression level in their tumor cells as compared to the non-responders. Our data determine that IRF8 represses p53 expression to maintain tumor cell sensitivity to intrinsic ferroptosis.
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Affiliation(s)
- Dakota B. Poschel
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA
- Georgia Cancer Center, Augusta, GA 30912, USA
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Mercy Kehinde-Ige
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA
- Georgia Cancer Center, Augusta, GA 30912, USA
| | - John D. Klement
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA
- Georgia Cancer Center, Augusta, GA 30912, USA
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Dafeng Yang
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA
- Georgia Cancer Center, Augusta, GA 30912, USA
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Alyssa D. Merting
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA
- Georgia Cancer Center, Augusta, GA 30912, USA
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Natasha M. Savage
- Department of Pathology, Medical College of Georgia, Augusta, GA 30912, USA
| | - Huidong Shi
- Georgia Cancer Center, Augusta, GA 30912, USA
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA
- Georgia Cancer Center, Augusta, GA 30912, USA
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
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Sahajpal NS, Mondal AK, Tvrdik T, Hauenstein J, Shi H, Deeb KK, Saxe D, Hastie AR, Chaubey A, Savage NM, Kota V, Kolhe R. Clinical Validation and Diagnostic Utility of Optical Genome Mapping for Enhanced Cytogenomic Analysis of Hematological Neoplasms. J Mol Diagn 2022; 24:1279-1291. [PMID: 36265723 DOI: 10.1016/j.jmoldx.2022.09.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/29/2022] [Accepted: 09/12/2022] [Indexed: 11/07/2022] Open
Abstract
The current standard-of-care cytogenetic techniques for the analysis of hematological malignancies include karyotyping, fluorescence in situ hybridization, and chromosomal microarray, which are labor intensive and time and cost prohibitive, and they often do not reveal the genetic complexity of the tumor, demonstrating the need for alternative technology for better characterization of these tumors. Herein, we report the results from our clinical validation study and demonstrate the utility of optical genome mapping (OGM), evaluated using 92 sample runs (including replicates) that included 69 well-characterized unique samples (59 hematological neoplasms and 10 controls). The technical performance (quality control metrics) resulted in 100% first-pass rate, with analytical performance (concordance) showing a sensitivity of 98.7%, a specificity of 100%, and an accuracy of 99.2%. OGM demonstrated robust technical, analytical performance, and interrun, intrarun, and interinstrument reproducibility. The limit of detection was determined to be at 5% allele fraction for aneuploidy, translocation, interstitial deletion, and duplication. OGM identified several additional structural variations, revealing the genomic architecture in these neoplasms that provides an opportunity for better tumor classification, prognostication, risk stratification, and therapy selection. Overall, OGM has outperformed the standard-of-care tests in this study and demonstrated its potential as a first-tier cytogenomic test for hematologic malignancies.
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Affiliation(s)
- Nikhil S Sahajpal
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Ashis K Mondal
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Tatiana Tvrdik
- Department of Pathology, Emory University, Atlanta, Georgia
| | | | - Huidong Shi
- Georgia Cancer Center, Augusta University, Augusta, Georgia
| | - Kristin K Deeb
- Department of Pathology, Emory University, Atlanta, Georgia
| | - Debra Saxe
- Department of Pathology, Emory University, Atlanta, Georgia
| | | | | | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Vamsi Kota
- Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Ravindra Kolhe
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia.
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8
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Bin Satter K, Ramsey Z, Tran PMH, Hopkins D, Bearden G, Richardson KP, Terris MK, Savage NM, Kavuri SK, Purohit S. Development of a Single Molecule Counting Assay to Differentiate Chromophobe Renal Cancer and Oncocytoma in Clinics. Cancers (Basel) 2022; 14:cancers14133242. [PMID: 35805014 PMCID: PMC9265083 DOI: 10.3390/cancers14133242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/28/2022] [Accepted: 06/28/2022] [Indexed: 02/01/2023] Open
Abstract
Malignant chromophobe renal cancer (chRCC) and benign oncocytoma (RO) are two renal tumor types difficult to differentiate using histology and immunohistochemistry-based methods because of their similarity in appearance. We previously developed a transcriptomics-based classification pipeline with “Chromophobe-Oncocytoma Gene Signature” (COGS) on a single-molecule counting platform. Renal cancer patients (n = 32, chRCC = 17, RO = 15) were recruited from Augusta University Medical Center (AUMC). Formalin-fixed paraffin-embedded (FFPE) blocks from their excised tumors were collected. We created a custom single-molecule counting code set for COGS to assay RNA from FFPE blocks. Utilizing hematoxylin-eosin stain, pathologists were able to correctly classify these tumor types (91.8%). Our unsupervised learning with UMAP (Uniform manifold approximation and projection, accuracy = 0.97) and hierarchical clustering (accuracy = 1.0) identified two clusters congruent with their histology. We next developed and compared four supervised models (random forest, support vector machine, generalized linear model with L2 regularization, and supervised UMAP). Supervised UMAP has shown to classify all the cases correctly (sensitivity = 1, specificity = 1, accuracy = 1) followed by random forest models (sensitivity = 0.84, specificity = 1, accuracy = 1). This pipeline can be used as a clinical tool by pathologists to differentiate chRCC from RO.
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Affiliation(s)
- Khaled Bin Satter
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, 1120, 15th St., Augusta, GA 30912, USA; (K.B.S.); (P.M.H.T.); (D.H.); (G.B.); (K.P.R.)
| | - Zach Ramsey
- Department of Pathology, Medical College of Georgia, Augusta University, 1120 15th St., Augusta, GA 30912, USA; (Z.R.); (N.M.S.); (S.K.K.)
| | - Paul M. H. Tran
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, 1120, 15th St., Augusta, GA 30912, USA; (K.B.S.); (P.M.H.T.); (D.H.); (G.B.); (K.P.R.)
| | - Diane Hopkins
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, 1120, 15th St., Augusta, GA 30912, USA; (K.B.S.); (P.M.H.T.); (D.H.); (G.B.); (K.P.R.)
| | - Gregory Bearden
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, 1120, 15th St., Augusta, GA 30912, USA; (K.B.S.); (P.M.H.T.); (D.H.); (G.B.); (K.P.R.)
| | - Katherine P. Richardson
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, 1120, 15th St., Augusta, GA 30912, USA; (K.B.S.); (P.M.H.T.); (D.H.); (G.B.); (K.P.R.)
| | - Martha K. Terris
- Department of Urology, Medical College of Georgia, Augusta University, 1120 15th St., Augusta, GA 30912, USA;
| | - Natasha M. Savage
- Department of Pathology, Medical College of Georgia, Augusta University, 1120 15th St., Augusta, GA 30912, USA; (Z.R.); (N.M.S.); (S.K.K.)
| | - Sravan K. Kavuri
- Department of Pathology, Medical College of Georgia, Augusta University, 1120 15th St., Augusta, GA 30912, USA; (Z.R.); (N.M.S.); (S.K.K.)
| | - Sharad Purohit
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, 1120, 15th St., Augusta, GA 30912, USA; (K.B.S.); (P.M.H.T.); (D.H.); (G.B.); (K.P.R.)
- Department of Obstetrics and Gynecology, Medical College of Georgia, Augusta University, 1120 15th St., Augusta, GA 30912, USA
- Department of Undergraduate Health Professionals, College of Allied Health Sciences, Augusta University, 1120 15th St., Augusta, GA 30912, USA
- Correspondence:
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9
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Merting AD, Poschel DB, Lu C, Klement JD, Yang D, Li H, Shi H, Chapdelaine E, Montgomery M, Redman MT, Savage NM, Nayak-Kapoor A, Liu K. Restoring FAS Expression via Lipid-Encapsulated FAS DNA Nanoparticle Delivery Is Sufficient to Suppress Colon Tumor Growth In Vivo. Cancers (Basel) 2022; 14:cancers14020361. [PMID: 35053524 PMCID: PMC8773494 DOI: 10.3390/cancers14020361] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/21/2021] [Accepted: 12/29/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary A key feature of human colorectal tumor is loss of FAS expression. FAS is the death receptor for FASL of activated T cells. Loss of FAS expression therefore may promote tumor cell immune escape. We aimed at determining whether restoring FAS expression is sufficient to suppress colorectal tumor growth. Mouse and human FAS cDNA was synthesized and encapsulated into cationic lipid nanoparticle DOTAP-Cholesterol to formulate DOTAP-Chol-mFAS and DOTAP-Chol-hFAS, respectively. Restoring FAS expression in metastatic mouse colon-tumor cells enabled FASL-induced elimination of FAS+ tumor cells in vitro and suppressed colon-tumor growth and progression in tumor-bearing mice in vivo. Restoring FAS expression induced FAS receptor auto-oligomerization and tumor cell auto-apoptosis in metastatic human colon-tumor cells in vitro. DOTAP-Chol-hFAS therapy is also sufficient to suppress metastatic human colon tumor xenograft growth in athymic mice. Tumor-selective delivery of FAS DNA nanoparticle is potentially an effective therapy for human colorectal cancer. Abstract A hallmark of human colorectal cancer is lost expression of FAS, the death receptor for FASL of cytotoxic T lymphocytes (CTLs). However, it is unknown whether restoring FAS expression alone is sufficient to suppress csolorectal-cancer development. The FAS promoter is hypermethylated and inversely correlated with FAS mRNA level in human colorectal carcinomas. Analysis of single-cell RNA-Seq datasets revealed that FAS is highly expressed in epithelial cells and immune cells but down-regulated in colon-tumor cells in human colorectal-cancer patients. Codon usage-optimized mouse and human FAS cDNA was designed, synthesized, and encapsulated into cationic lipid to formulate nanoparticle DOTAP-Chol-mFAS and DOTAP-Chol-hFAS, respectively. Overexpression of codon usage-optimized FAS in metastatic mouse colon-tumor cells enabled FASL-induced elimination of FAS+ tumor cells in vitro, suppressed colon tumor growth, and increased the survival of tumor-bearing mice in vivo. Overexpression of codon-optimized FAS-induced FAS receptor auto-oligomerization and tumor cell auto-apoptosis in metastatic human colon-tumor cells. DOTAP-Chol-hFAS therapy is also sufficient to suppress metastatic human colon tumor xenograft growth in athymic mice. DOTAP-Chol-mFAS therapy exhibited no significant liver toxicity. Our data determined that tumor-selective delivery of FAS DNA nanoparticles is sufficient for suppression of human colon tumor growth in vivo.
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Affiliation(s)
- Alyssa D. Merting
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; (A.D.M.); (D.B.P.); (C.L.); (J.D.K.); (D.Y.); (H.L.)
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Dakota B. Poschel
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; (A.D.M.); (D.B.P.); (C.L.); (J.D.K.); (D.Y.); (H.L.)
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Chunwan Lu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; (A.D.M.); (D.B.P.); (C.L.); (J.D.K.); (D.Y.); (H.L.)
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - John D. Klement
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; (A.D.M.); (D.B.P.); (C.L.); (J.D.K.); (D.Y.); (H.L.)
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Dafeng Yang
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; (A.D.M.); (D.B.P.); (C.L.); (J.D.K.); (D.Y.); (H.L.)
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Honglin Li
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; (A.D.M.); (D.B.P.); (C.L.); (J.D.K.); (D.Y.); (H.L.)
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
| | - Huidong Shi
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
| | | | | | | | - Natasha M. Savage
- Department of Pathology, Medical College of Georgia, Augusta, GA 30912, USA;
| | - Asha Nayak-Kapoor
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; (A.D.M.); (D.B.P.); (C.L.); (J.D.K.); (D.Y.); (H.L.)
- Georgia Cancer Center, Medical College of Georgia, Augusta, GA 30912, USA; (H.S.); (A.N.-K.)
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
- Correspondence: ; Tel.: +1-706-721-9483
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10
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Jin Y, Savage NM, Bollag RJ, Xu H, Singh G. Light Chain Multiple Myeloma: High Serum Free Light Chain Concentrations Portend Renal Damage and Poorer Survival. J Appl Lab Med 2021; 6:1592-1600. [PMID: 34468749 DOI: 10.1093/jalm/jfab090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/25/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND Monoclonal immunoglobulins provide an indication of the tumor burden in patients with plasma cell neoplasms. Higher concentrations of serum free light chains in light chain predominant multiple myeloma have been shown to correlate with a poorer outcome. We examined the correlations of serum free light chain concentrations in light chain myelomas with survival, estimated glomerular filtration rate (eGFR) and other clinical and pathological parameters. METHODS Records of patients with light chain multiple myelomas were reviewed. Highest concentration of serum free light chains for each patient were plotted to ascertain an inflection/change point. Survival, eGFR, and other clinical and pathological parameters were compared between the low and high light chain concentration groups. RESULTS Plotting serum free light chain concentrations revealed an inflection point at a concentration of 455 mg/L apportioning patients in to 2 subgroups: 39 patients with low light chain concentrations and 26 patients with high concentrations. The high concentration group had more unfavorable pathology in bone marrow examination in terms of higher neoplastic plasma cell burden and high-risk cytogenetics. The survival rate and eGFR in the high concentration group were significantly worse than in the low concentration group. CONCLUSIONS As noted for light chain predominant multiple myeloma, high serum free light chain concentration in light chain multiple myelomas are associated with higher renal disease burden and shorter survival. Monitoring of serum free light chain concentrations and customizing treatments to address this parameter are warranted.
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Affiliation(s)
- Yulan Jin
- Department of Pathology, Augusta University
| | | | - Roni J Bollag
- Department of Pathology, Medical College of Georgia at Augusta University
| | - Hongyan Xu
- Department of Biostatistics and Data Sciences, Augusta University
| | - Gurmukh Singh
- Department of Clinical Pathology, Truman Medical Center
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11
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Wilhite D, Arfa A, Cotter T, Savage NM, Bollag RJ, Singh G. Multiple myeloma: Detection of free monoclonal light chains by modified immunofixation electrophoresis with antisera against free light chains. Pract Lab Med 2021; 27:e00256. [PMID: 34703870 PMCID: PMC8521168 DOI: 10.1016/j.plabm.2021.e00256] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/13/2021] [Accepted: 10/05/2021] [Indexed: 01/01/2023] Open
Abstract
Introduction Neoplastic monoclonal gammopathies are frequently associated with production of excess free monoclonal light chains. A sensitive method for detecting free monoclonal light chains in serum could provide a marker for residual/minimal residual disease and as an adjunct to serum protein electrophoresis to serve as a screening method for monoclonal gammopathies. Methods Conventional serum immunofixation electrophoresis was modified by applying undiluted serum samples, and staining for serum free light chains with antisera specific to free light chains. Washing/blotting of gels was enhanced to remove residual proteins that did not bind to the antibodies including intact monoclonal immunoglobulins. Results from this modified immunofixation electrophoresis were compared with results from commercially available MASS-FIX/MALDI assay. Results Monoclonal free kappa light chains could be detected to a concentration of about 1.78 mg/L and monoclonal free lambda light chains to a concentration of about 1.15 mg/L without the need for special equipment. Comparison of these thresholds with parallel results from a commercially available MASS-FIX/MALDI assay revealed the modified electrophoretic method to be more sensitive in the context of free monoclonal light chains. Conclusions Modified serum immunofixation electrophoresis has been shown to detect low levels of monoclonal free light chains at a sensitivity suitable for the method to be used in detecting minimal residual disease, and potentially in a screening assay for monoclonal gammopathies. The disparity in the results with commercially available MASS-FIX/MALDI assay is postulated to be due to limited repertoire of reactivity of nanobodies of camelid origin.
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Affiliation(s)
- Dorian Wilhite
- Department of Pathology, Medical College of Georgia at Augusta University, 1120 15th Street, BI 2008A, Augusta, GA, 30912, USA
| | - Ahmed Arfa
- Department of Pathology, Medical College of Georgia at Augusta University, 1120 15th Street, BI 2008A, Augusta, GA, 30912, USA
| | - Thomas Cotter
- Department of Pathology, Medical College of Georgia at Augusta University, 1120 15th Street, BI 2008A, Augusta, GA, 30912, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University, 1120 15th Street, BI 2008A, Augusta, GA, 30912, USA
| | - Roni J Bollag
- Department of Pathology, Medical College of Georgia at Augusta University, 1120 15th Street, BI 2008A, Augusta, GA, 30912, USA
| | - Gurmukh Singh
- Department of Pathology, Medical College of Georgia at Augusta University, 1120 15th Street, BI 2008A, Augusta, GA, 30912, USA
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12
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Zarak MS, Sliker T, Javadi T, Ullah A, Heneidi SG, Biddinger P, Savage NM, Homlar K, Clarence J, White J. Unusual Presentation of Lipofibromatosis-Like Neural Tumor in an Adult: A Case Report. Saudi J Med Med Sci 2021; 9:267-270. [PMID: 34667475 PMCID: PMC8473993 DOI: 10.4103/sjmms.sjmms_63_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 07/07/2021] [Accepted: 07/28/2021] [Indexed: 11/04/2022]
Abstract
Lipofibromatosis-like neural tumor (LPF-NT) is a rare variant of lipofibromatosis. Standard lipofibromatosis tumors show a predilection for the distal extremities of male children or young adults and are typically painless, slow-growing, subcutaneous or deep soft tissue masses. We present a case of a 50-year-old male with a slowly expanding, right foot mass. Physical examination revealed a painful, non-tender firm mass on the right medial foot. Magnetic imaging studies revealed a poorly defined soft tissue mass extending through subcutaneous tissue up to the dermis. Histologic examination revealed a spindle cell neoplasm. Immunohistochemistry showed co-expression of S100 protein, CD34 and TRK. In addition, the lesion was found to be positive for the LMNA-NTRK1 fusion by next-generation sequencing. These findings were supportive of a diagnosis of LPF-NT. At 3-month post-excision, the patient had no pain and repeat imaging indicated no evidence of tumor. The authors recommended including LPF-NT in the differential diagnosis of masses or lesions that are fibro-fatty tumors.
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Affiliation(s)
- Muhammad Samsoor Zarak
- Department of Public Health, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA
| | - Taylor Sliker
- Department of Pathology, Medical College of Georgia, Augusta, Georgia, USA
| | - Tiffany Javadi
- College of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Asad Ullah
- Department of Pathology, Medical College of Georgia, Augusta, Georgia, USA
| | - Saleh G Heneidi
- Department of Pathology, Medical College of Georgia, Augusta, Georgia, USA
| | - Paul Biddinger
- Department of Pathology, Medical College of Georgia, Augusta, Georgia, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta, Georgia, USA
| | - Kelly Homlar
- Department of Orthopedics, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Joe Clarence
- Department of Radiology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Joseph White
- Department of Pathology, Medical College of Georgia, Augusta, Georgia, USA
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13
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Sivakolundu KP, Vijaya Prakash A, Savage NM, Kota VK, Zarkua K. A Rare Case of Epidural Myeloma Presenting as Recurrent Subdural Bleeding. Cureus 2021; 13:e17794. [PMID: 34660004 PMCID: PMC8496494 DOI: 10.7759/cureus.17794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2021] [Indexed: 11/09/2022] Open
Abstract
Multiple myeloma (MM) is an incurable clonal B-cell malignancy that usually presents with neoplastic monoclonal plasma cells in either bone or soft tissues. Central nervous system involvement of the myeloma (CNS-MM), such as dural myeloma or intraparenchymal infiltration, or diffuse leptomeningeal involvement, is uncommon. Dural involvement of myeloma without parenchymal or leptomeningeal disease is even rarer, with only seven cases reported previously. We present a case of epidural myeloma in a 50-year-old man with known kappa light chain MM, presenting with multiple episodes of subdural hemorrhage and progressive neurological deficits. He initially presented with severe back pain, hypercalcemia, and acute kidney injury (AKI). Further evaluation showed lytic bone lesions and elevated kappa light chains, and bone marrow biopsy showed 32% of clonal plasma cells. He was initially treated with bortezomib, lenalidomide, and dexamethasone combination, followed by pomalidomide and daratumumab. Eventually, he developed two episodes of subdural hemorrhage and left-sided seventh cranial nerve palsy, which was treated conservatively and monitored by computed tomography (CT) of the head. However, he gradually developed multiple cranial nerve palsies, weakness, and urinary incontinence. Cerebrospinal fluid (CSF) analysis showed elevated protein without any aberrant immunophenotype. Magnetic resonance imaging (MRI) of the brain showed diffuse smooth dural enhancement with extensive calvarial and skull base marrow replacement; MRI of the spine showed diffuse epidural enhancement in thoracic and lumbar regions, findings consistent with epidural myeloma. The patient received three doses of cranial irradiation but, unfortunately, could not tolerate further treatment and opted for hospice care. Intracranial hemorrhage is common in MM patients, and it is important to consider CNS involvement in patients presenting with recurrent subdural hemorrhage and to perform imaging (preferably MRI) earlier in the disease course. Due to its rarity, the treatment of CNS-MM is very heterogeneous. Thus, case reporting is important to accumulate data on this rare presentation.
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Affiliation(s)
- Keerthana P Sivakolundu
- Department of General Medicine, Government Kilpauk Medical College, Chennai, IND.,Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
| | - Aviraag Vijaya Prakash
- Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, USA
| | - Vamsi K Kota
- Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
| | - Kristina Zarkua
- Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
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14
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Vijaya Prakash A, Sivakolundu KP, Savage NM, Kota VK, Shoukier M. Sudden Blast Crisis After Excellent Initial Response in Chronic Myeloid Leukemia. Cureus 2021; 13:e18368. [PMID: 34729261 PMCID: PMC8555935 DOI: 10.7759/cureus.18368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2021] [Indexed: 11/25/2022] Open
Abstract
Sudden blast crisis is an uncommon phenomenon in chronic myeloid leukemia (CML) patients who are being treated with tyrosine kinase inhibitors (TKIs). Despite well-defined guidelines to treat and monitor the disease, it is difficult to predict the occurrence of a sudden blast crisis. Research directed towards improving guidelines in choosing the appropriate TKIs and better monitoring protocols could help prevent such unfortunate outcomes. We present a case of a 46-year-old man diagnosed with CML who responded well to imatinib as evidenced by a downtrend in quantitative BCR-ABL mutation to less than 1. He quickly transformed into a blast crisis phase after five months of therapy with imatinib regardless of achieving an excellent initial optimal response. In conclusion, it is possible to transform into a blast phase despite achieving an initial optimal response. Therefore, attention should be focused on the selection of proper tyrosine kinase inhibitors and careful monitoring to allow the early detection of sudden blast crisis.
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Affiliation(s)
- Aviraag Vijaya Prakash
- Department of General Medicine, Employees State Insurance Corporation Medical College, Bangalore, IND
- Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, USA
| | - Keerthana P Sivakolundu
- Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, USA
| | - Vamsi K Kota
- Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
| | - Mahran Shoukier
- Department of Hematology and Oncology, Georgia Cancer Center at Augusta University, Augusta, USA
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15
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Singh G, Savage NM, Jillella AP, Bollag RJ. Light Chain-Predominant Multiple Myeloma Subgroup: Impaired Renal Function Correlates with Decreased Survival. Lab Med 2021; 53:145-148. [PMID: 34388245 DOI: 10.1093/labmed/lmab054] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Patients with light chain-predominant multiple myeloma have been shown to exhibit shorter survival. Retrospective comparison of clinical and laboratory data was undertaken to ascertain the likely cause(s) of this observation. METHODS Records of patients with multiple myeloma seen at 1 institution revealed 316 patients with conventional and 71 patients with light chain-predominant multiple myelomas with secretion of intact immunoglobulins. Laboratory and clinical findings in the 2 groups were compared. RESULTS Patients with light chain-predominant multiple myeloma had a significantly higher death rate, a higher rate of chronic dialysis, a lower estimated glomerular filtration rate and serum albumin, a significantly higher urine protein concentration, and a significantly higher prevalence of hypertension and blood transfusion requirements. Other clinical and laboratory parameters surveyed were not significantly different between the 2 groups. CONCLUSION The shorter survival of patients with light chain-predominant multiple myeloma is clearly associated with renal damage caused by excess free immunoglobulin light chains. Renal damage may be ameliorated by early aggressive treatment with chemotherapy, plasmapheresis, and dialysis; a multi-institutional prospective controlled trial would be needed to test this hypothesis.
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Affiliation(s)
- Gurmukh Singh
- Division of Clinical Pathology, Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia, US
| | - Natasha M Savage
- Division of Clinical Pathology, Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia, US
| | - Anand P Jillella
- Division of Hematology/Oncology, Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, US
| | - Roni J Bollag
- Division of Clinical Pathology, Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia, US
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16
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Ullah A, Omar N, Savage NM, Bollag RJ, Singh G. Immune subtraction for improved resolution in serum protein immunofixation electrophoresis and antibody isotype determination in a patient with autoantibody. Pract Lab Med 2021; 26:e00240. [PMID: 34124325 PMCID: PMC8173025 DOI: 10.1016/j.plabm.2021.e00240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 04/18/2021] [Accepted: 05/26/2021] [Indexed: 11/21/2022] Open
Abstract
Heavy chain isotypes of low level monoclonal immunoglobulins are sometimes obscured in serum immunofixation electrophoresis (SIFE) by a heavy background of polyclonal immunoglobulins. However, accurate determination of the heavy chain isotype is essential for a complete diagnosis, as isotype determination of autoantibodies may have relevance in determining therapeutic procedures. Immune subtraction (IS) was employed in a patient with neuropathy and GD1a autoantibody. IS allowed identification of the cognate heavy chain related to a lambda light chain restriction noted on initial SIFE as well as isotype determination of the autoantibody. Antisera specific to individual heavy and light chains were used for depletion of specific immunoglobulin types. Depletion of kappa light chain associated immunoglobulins allowed unequivocal determination of the isotype of lambda light chain-associated low level monoclonal band to be IgG Lambda. Selective depletion of kappa, lambda, gamma and mu heavy chain immunoglobulins was employed to determine IgG Kappa isotype of the auto-antibody.
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Affiliation(s)
- Asad Ullah
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA, 30912, USA
| | - Nivin Omar
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA, 30912, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA, 30912, USA
| | - Roni J Bollag
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA, 30912, USA
| | - Gurmukh Singh
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA, 30912, USA
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17
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Singh G, Bollag R, Kolhe R, McMullen A, Savage NM. Engaging Pathology Residents in Scholarly Activities. J Appl Lab Med 2021; 6:567-569. [PMID: 33674882 DOI: 10.1093/jalm/jfaa094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 05/11/2020] [Indexed: 11/14/2022]
Affiliation(s)
- Gurmukh Singh
- Medical College of Georgia at Augusta University, GA
| | - Roni Bollag
- Medical College of Georgia at Augusta University, GA
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18
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Singh G, Bollag RJ, Savage NM. Engaging Pathology Residents in Clinical Chemistry: The Essential Ingredient Is a Committed Teacher. J Appl Lab Med 2020; 6:522-531. [PMID: 33674880 DOI: 10.1093/jalm/jfaa140] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 07/28/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Pathology residents are thought to show a lack of interest in clinical chemistry, therefore potentially graduating from training programs unprepared to function as laboratory directors and clinical consultants. METHODS A structured program of tutorials based primarily on Henry's textbook, supplemented by recent review articles; a question bank of about 600 questions to emphasize key concepts; requirement for performing and presenting quality improvement projects; participation in on-site CAP inspections; review of reference laboratory test requests; and involving residents in scholarly activity have resulted in sustained, transferable, and significant improvements in engagement, knowledge, competence, and examination scores. RESULTS The primary parameter for measuring change in resident competence and engagement were improvements in resident in-service examination (RISE) scores, publications in peer-reviewed journals, and receipt of awards. The revised program produced significant improvement in RISE scores in clinical chemistry, over and above the improvements in the general residency program. The residents were authors on 12 publications in peer-reviewed PubMed listed journals in the 5-year period since revision in the clinical chemistry curriculum compared to no publications in clinical chemistry in the 5-year period before the new curriculum. Over the past 2 years, 6 of the 11 publications by graduating residents were in clinical chemistry, and 6 of 7 awards for research were garnered by residents engaged in clinical chemistry investigations. All of the residents passed their clinical pathology boards on first attempt since the change compared to 2 failures in the prior 5-year period. CONCLUSIONS The structured program described here is important as a template that could be adopted by any pathology training program. The question bank developed by this program is a valuable and transferable aid. However, success of such a program is dependent on the commitment of a knowledgeable, dedicated, and passionate teacher.
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Affiliation(s)
- Gurmukh Singh
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA
| | - Roni J Bollag
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, GA
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19
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Savage NM, Bollag R, Singh G. Inclusion and Diversity in Pathology Residency Training. J Appl Lab Med 2020; 6:304-306. [PMID: 33156913 DOI: 10.1093/jalm/jfaa170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 08/31/2020] [Indexed: 11/13/2022]
Affiliation(s)
- Natasha M Savage
- Departments of Pathology.,Hematology and Hematopathology.,Pathology Residency Training Program
| | - Roni Bollag
- Departments of Pathology.,Department of Pathology, Transfusion Medicine Fellowship
| | - Gurmukh Singh
- Departments of Pathology.,Department of Clinical Pathology, Medical College of Georgia at Augusta University, Augusta, GA
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20
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Sahajpal NS, Mondal AK, Ananth S, Njau A, Ahluwalia P, Jones K, Ahluwalia M, Okechukwu N, Savage NM, Kota V, Rojiani AM, Kolhe R. Clinical performance and utility of a comprehensive next-generation sequencing DNA panel for the simultaneous analysis of variants, TMB and MSI for myeloid neoplasms. PLoS One 2020; 15:e0240976. [PMID: 33075099 PMCID: PMC7571681 DOI: 10.1371/journal.pone.0240976] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 10/06/2020] [Indexed: 01/10/2023] Open
Abstract
The extensively employed limited-gene coverage NGS panels lead to clinically inadequate molecular profiling of myeloid neoplasms. The aim of the present investigation was to assess performance and clinical utility of a comprehensive DNA panel for myeloid neoplasms. Sixty-one previously well characterized samples were sequenced using TSO500 library preparation kit on NextSeq550 platform. Variants with a VAF ≥ 5% and a total read depth of >50X were filtered for analysis. The following results were recorded-for clinical samples: clinical sensitivity (97%), specificity (100%), precision (100%) and accuracy (99%) whereas reference control results were 100% for analytical sensitivity, specificity, precision and accuracy, with high intra- and inter-run reproducibility. The panel identified 880 variants across 292 genes, of which, 749 variants were in genes not covered in the 54 gene panel. The investigation revealed 14 variants in ten genes, and at least one was present in 96.2% patient samples that were pathogenic/ likely pathogenic in myeloid neoplasms. Also, 15 variants in five genes were found to be pathogenic/ likely pathogenic in other tumor types. Further, the TMB and MSI scores ranged from 0–7 and 0–9, respectively. The high analytical performance and clinical utility of this comprehensive NGS panel makes it practical and clinically relevant for adoption in clinical laboratories for routine molecular profiling of myeloid neoplasms.
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Affiliation(s)
- Nikhil Shri Sahajpal
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Ashis K. Mondal
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Sudha Ananth
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Allan Njau
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
- Department of Pathology, Aga Khan University Hospital, Nairobi, Kenya
| | - Pankaj Ahluwalia
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Kimya Jones
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Meenakshi Ahluwalia
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Nwogbo Okechukwu
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Natasha M. Savage
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Vamsi Kota
- Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Amyn M. Rojiani
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
| | - Ravindra Kolhe
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, United States of America
- * E-mail:
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21
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Lu C, Yang D, Klement JD, Oh K, Savage NM, Waller JL, Colby AH, Grinstaff MW, Oberlies NH, Pearce C, Xie Z, Kulp S, Coss C, Phelps MA, Albers T, Lebedyeva IO, Liu K. Abstract A32: The SUV39H1-H3K9me3 pathway represses cytotoxic T lymphocyte effector expression to confer colon carcinoma immune escape. Cancer Immunol Res 2020. [DOI: 10.1158/2326-6074.tumimm18-a32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Despite the presence of cytotoxic T lymphocytes (CTLs) in the tumor microenvironment, the majority of immunogenic human colon cancers do not respond to immune checkpoint inhibitor immunotherapy and microsatellite instable (MSI) tumors are not naturally eliminated. The molecular mechanism underlying the inactivity of tumor-infiltrating CTLs is unknown. We report here that CTLs are present in both MSI and microsatellite stable (MSS) colon tumors. The expression of the H3K9me3-specific histone methyltransferase SUV39H1 is significantly elevated in human colon carcinoma as compared to normal colon tissues. Using a mouse colon carcinoma model, we further determined that tumor-infiltrating CTLs in the colon tumor microenvironment express high levels of SUV39H1. To target SUV39H1 in the tumor microenvironment, a virtual chemical library was screened based on the SET domain structure of human SUV39H1 protein. Functional enzymatic activity assays identified a small molecule that inhibits SUV39H1 enzymatic activity. Based on the structure of this small molecule, we modified it and chemically synthesized a novel small molecule, termed F5446, which has an EC50 of 0.496 μM for SUV39H1 enzymatic activity. H3K9me3 is enriched in the promoters of GZMB, PRF1, FASLG and IFNG in quiescent T cells. F5446 inhibits H3K9me3, thereby upregulating expression of these effectors in tumor-infiltrating CTLs and suppressing colon carcinoma growth in a CD8+ CTL-dependent manner in vivo. Our data indicate that SUV39H1 represses CTL effector expression and, in doing so, confers colon cancer immune escape.
Citation Format: Chunwan Lu, Dafeng Yang, John D. Klement, II Kyu Oh, Natasha M. Savage, Jennifer L. Waller, Aaron H. Colby, Mark W. Grinstaff, Nicholas H. Oberlies, Cedric Pearce, Zhiliang Xie, Samuel Kulp, Christopher Coss, Mitch A. Phelps, Thomas Albers, Iryna O. Lebedyeva, Kebin Liu. The SUV39H1-H3K9me3 pathway represses cytotoxic T lymphocyte effector expression to confer colon carcinoma immune escape [abstract]. In: Proceedings of the AACR Special Conference on Tumor Immunology and Immunotherapy; 2018 Nov 27-30; Miami Beach, FL. Philadelphia (PA): AACR; Cancer Immunol Res 2020;8(4 Suppl):Abstract nr A32.
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Affiliation(s)
- Chunwan Lu
- 1Medical College of Georgia, Augusta, GA,
| | | | | | - Kyu Oh
- 1Medical College of Georgia, Augusta, GA,
| | | | | | | | | | | | | | | | | | | | | | | | | | - Kebin Liu
- 1Medical College of Georgia, Augusta, GA,
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22
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Singh G, Savage NM, Gunsolus B, Foss KA. Requiem for the STAT Test: Automation and Point of Care Testing. Lab Med 2020; 51:e27-e31. [PMID: 31747455 DOI: 10.1093/labmed/lmz080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE Quick turnaround of laboratory test results is needed for medical and administrative reasons. Historically, laboratory tests have been requested as routine or STAT. With a few exceptions, a total turnaround time of 90 minutes has been the usually acceptable turnaround time for STAT tests. METHODS We implemented front-end automation and autoverification and eliminated batch testing for routine tests. We instituted on-site intraoperative testing for selected analytes and employed point of care (POC) testing judiciously. The pneumatic tube system for specimen transport was expanded. RESULTS The in-laboratory turnaround time was reduced to 45 minutes for more than 90% of tests that could reasonably be ordered STAT. With rare exceptions, the laboratory no longer differentiates between routine and STAT testing. Having a single queue for all tests has improved the efficiency of the laboratory. CONCLUSION It has been recognized in manufacturing that batch processing and having multiple queues for products are inefficient. The same principles were applied to laboratory testing, which resulted in improvement in operational efficiency and elimination of STAT tests. We propose that the target for in-laboratory turnaround time for STAT tests, if not all tests, be 45 minutes or less for more than 90% of specimens.
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Affiliation(s)
- Gurmukh Singh
- Professor of Pathology, Shepeard Chair in Clinical Pathology, Vice Chair of Pathology, Augusta, Georgia
| | - Natasha M Savage
- Associate Professor of Pathology, Director of Hematology and Hematopathology, Augusta, Georgia
| | - Brandy Gunsolus
- Pathology Utilization Manager, Clinical Pathology, Augusta, Georgia
| | - Kellie A Foss
- Administrative Director for Pathology Services, Medical College of Georgia at Augusta University, Department of Pathology, Augusta, Georgia
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23
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Thompson TZ, Kunak RL, Savage NM, Agarwal S, Chazelle J, Singh G. Intraoperative Monitoring of Heparin: Comparison of Activated Coagulation Time and Whole Blood Heparin Measurements by Different Point-of-Care Devices with Heparin Concentration by Laboratory-Performed Plasma Anti-Xa Assay. Lab Med 2020; 50:348-356. [PMID: 31053856 DOI: 10.1093/labmed/lmz014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Cardiac surgical interventions, extracorporeal membrane oxygenation, transcutaneous coronary-artery angioplasty, and stenting are carried out while patients are being treated with the anticoagulation drug heparin. Monitoring the level and reversal of heparinization during and at the conclusion of medical and surgical procedures is a critical issue in patient care. METHODS We performed parallel testing of the ACCRIVA Hemochron Signature Elite ACT+ and Hemochron Response analyzer, iSTAT platform, and 2 Hepcon Hemostasis Management System (HMS) Plus analyzers for monitoring intraoperative heparin treatment. Laboratory anti-Xa assay was used as the criterion standard for heparin measurement. RESULTS Poor correlation between the 2 Hemochron analyzers was identified at 0.78. Correlation between the analyzers on the i-STAT platform was 0.97. Regression analysis revealed that i-STAT values were generally lower, by 43 seconds, than Hemochron values. The correlation between Hepcon and i-STAT activated clotting time (ACT) results was 0.94. The i-STAT ACT results were generally 23 seconds lower than the Hepcon ACT values. Correlation coefficients on comparing Hepcon ACT and i-STAT ACT using laboratory anti-Xa assay were 0.83 and 0.87, respectively. The correlation between Hepcon heparin concentration and anti-Xa results was 0.85. CONCLUSIONS ACT monitoring with iSTAT offers good correlation between instruments and with the Hepcon ACT. Hepcon occupies a specific niche in cardiac operating departments because of its ability to provide additional information regarding heparin concentration; however, lack of suitable proficiency testing may impair its use. The iSTAT is a more reliable platform for broader, hospital-wide application.
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Affiliation(s)
- Thomas Z Thompson
- Department of Pathology, Medical College of Georgia at Augusta University
| | - Rebecca L Kunak
- Department of Pathology, Medical College of Georgia at Augusta University
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University
| | - Shvetank Agarwal
- Department of Anesthesiology and Perioperative Medicine, Medical College of Georgia at Augusta University
| | - Jennifer Chazelle
- Department of Pathology, Medical College of Georgia at Augusta University
| | - Gurmukh Singh
- Department of Pathology, Medical College of Georgia at Augusta University
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24
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Kunak RL, Rojiani A, Savage NM. Educational Case: Acute Promyelocytic Leukemia With PML-RARA. Acad Pathol 2019; 6:2374289519875647. [PMID: 31555723 PMCID: PMC6753509 DOI: 10.1177/2374289519875647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/19/2019] [Accepted: 08/10/2019] [Indexed: 11/21/2022] Open
Abstract
The following fictional case is intended as a learning tool within the Pathology
Competencies for Medical Education (PCME), a set of national standards for teaching
pathology. These are divided into three basic competencies: Disease Mechanisms and
Processes, Organ System Pathology, and Diagnostic Medicine and Therapeutic Pathology.
For additional information, and a full list of learning objectives for all three
competencies, see http://journals.sagepub.com/doi/10.1177/2374289517715040.
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Affiliation(s)
- Rebecca L Kunak
- Department of Pathology, Medical College of Georgia, Augusta University Medical Center, Augusta, GA, USA
| | - Amyn Rojiani
- Department of Pathology, Medical College of Georgia, Augusta University Medical Center, Augusta, GA, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta University Medical Center, Augusta, GA, USA
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25
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Abstract
Skull base pseudotumors, or tumefactive fibroinflammatory lesions (TFIL), are tumors characterized by local destruction with benign histopathology. Treatment includes surgery and steroids with varying degrees of symptom relief. A 45-year-old female presented with right otorrhea and middle ear effusion, which progressed to CN V3 pain/numbness, trismus, headache, and autophony. MRI showed a diffuse infiltrating mass in the right infratemporal region involving the trigeminal ganglion. Biopsy revealed benign fibromuscular and adipose tissue with lymphoplasmacytic infiltrate, giving a diagnosis of TFIL. Resection would be very difficult given tumor location. Initial treatment included an extended course of steroids without response, and interval disease progression. Two courses of rituximab 375 mg/m2 weekly × 4 given 3 months apart were then completed with excellent tolerance. With sixteen months following induction, the patient reports minimal symptoms with radiographic findings confirming continued disease regression. Rituximab is a potential treatment option for patients with TFIL without response to steroids.
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Affiliation(s)
- Jessica L Bishop
- Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Locke J. Bryan
- Department of Medicine, Division of Hematology/Oncology, Georgia Cancer Center at Augusta University, Augusta, GA, USA
- Address correspondence to:Dr. Locke J. Bryan, Department of Medicine, Division of Hematology/Oncology, Georgia Cancer Center at Augusta University, 1120 15th Street, Augusta, GA 30912, USA. E-mail:
| | - Natasha M. Savage
- Department of Pathology, Division of Hematopathology/Hematology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - J. Kenneth Byrd
- Department of Otolaryngology, Head and Neck Surgery, Medical College of Georgia at Augusta University, Augusta, GA, USA
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26
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Lu C, Yang D, Klement JD, Oh IK, Savage NM, Waller JL, Colby AH, Grinstaff MW, Oberlies NH, Pearce CJ, Xie Z, Kulp SK, Coss CC, Phelps MA, Albers T, Lebedyeva IO, Liu K. SUV39H1 Represses the Expression of Cytotoxic T-Lymphocyte Effector Genes to Promote Colon Tumor Immune Evasion. Cancer Immunol Res 2019; 7:414-427. [PMID: 30610059 DOI: 10.1158/2326-6066.cir-18-0126] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 08/07/2018] [Accepted: 12/18/2018] [Indexed: 01/23/2023]
Abstract
Despite the presence of CTLs in the tumor microenvironment, the majority of immunogenic human colon cancer does not respond to immune checkpoint inhibitor immunotherapy, and microsatellite instable (MSI) tumors are not naturally eliminated. The molecular mechanism underlying the inactivity of tumor-infiltrating CTLs is unknown. We report here that CTLs were present in both MSI and microsatellite stable colon tumors. The expression of the H3K9me3-specific histone methyltransferase SUV39H1 was significantly elevated in human colon carcinoma compared with normal colon tissues. Using a mouse colon carcinoma model, we further determined that tumor-infiltrating CTLs in the colon tumor microenvironment have high expression of SUV39H1. To target SUV39H1 in the tumor microenvironment, a virtual chemical library was screened on the basis of the SET (suppressor of variegation 3-9, enhancer of zeste and trithorax) domain structure of the human SUV39H1 protein. Functional enzymatic activity assays identified a small molecule that inhibits SUV39H1 enzymatic activity. On the basis of the structure of this small molecule, we modified it and chemically synthesized a small molecule, termed F5446, which has an EC50 of 0.496 μmol/L for SUV39H1 enzymatic activity. H3K9me3 was enriched in the promoters of GZMB, PRF1, FASLG, and IFNG in quiescent T cells. F5446 inhibited H3K9me3, thereby upregulating expression of these effectors in tumor-infiltrating CTLs and suppressing colon carcinoma growth in a CD8+ CTL-dependent manner in vivo Our data indicate that SUV39H1 represses CTL effector gene expression and, in doing so, confers colon cancer immune escape.
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MESH Headings
- Animals
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Cell Line, Tumor
- Colonic Neoplasms/drug therapy
- Colonic Neoplasms/immunology
- Colonic Neoplasms/metabolism
- Disease Models, Animal
- Enzyme Inhibitors/pharmacology
- Enzyme Inhibitors/therapeutic use
- Female
- Gene Expression Regulation, Neoplastic/drug effects
- Gene Expression Regulation, Neoplastic/immunology
- Histones/metabolism
- Humans
- Lymphocytes, Tumor-Infiltrating/drug effects
- Lymphocytes, Tumor-Infiltrating/immunology
- Lymphocytes, Tumor-Infiltrating/metabolism
- Methyltransferases/antagonists & inhibitors
- Methyltransferases/immunology
- Methyltransferases/metabolism
- Mice
- Repressor Proteins/antagonists & inhibitors
- Repressor Proteins/immunology
- Repressor Proteins/metabolism
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- Tumor Escape
- Tumor Microenvironment/drug effects
- Tumor Microenvironment/immunology
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Affiliation(s)
- Chunwan Lu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia.
- Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia
- Charlie Norwood VA Medical Center, Augusta, Georgia
| | - Dafeng Yang
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia
- Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia
- Charlie Norwood VA Medical Center, Augusta, Georgia
| | - John D Klement
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia
- Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia
- Charlie Norwood VA Medical Center, Augusta, Georgia
| | - Il Kyu Oh
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta, Georgia
| | - Jennifer L Waller
- Department of Population Health Sciences, Medical College of Georgia, Augusta, Georgia
| | - Aaron H Colby
- Ionic Pharmaceuticals, Brookline, Massachusetts
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts
| | - Mark W Grinstaff
- Ionic Pharmaceuticals, Brookline, Massachusetts
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina
| | | | - Zhiliang Xie
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, Ohio
| | - Samuel K Kulp
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, Ohio
| | - Christopher C Coss
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, Ohio
| | - Mitch A Phelps
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, Ohio
| | - Thomas Albers
- Department of Chemistry and Physics, Augusta University, Augusta, Georgia
| | - Iryna O Lebedyeva
- Department of Chemistry and Physics, Augusta University, Augusta, Georgia
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia.
- Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia
- Charlie Norwood VA Medical Center, Augusta, Georgia
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27
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Ibrahim ML, Klement JD, Lu C, Redd PS, Xiao W, Yang D, Browning DD, Savage NM, Buckhaults PJ, Morse HC, Liu K. Myeloid-Derived Suppressor Cells Produce IL-10 to Elicit DNMT3b-Dependent IRF8 Silencing to Promote Colitis-Associated Colon Tumorigenesis. Cell Rep 2018; 25:3036-3046.e6. [PMID: 30540937 PMCID: PMC6319669 DOI: 10.1016/j.celrep.2018.11.050] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 10/06/2018] [Accepted: 11/12/2018] [Indexed: 12/13/2022] Open
Abstract
IL-10 functions as a suppressor of colitis and colitis-associated colon cancer, but it is also a risk locus associated with ulcerative colitis. The mechanism underlying the contrasting roles of IL-10 in inflammation and colon cancer is unknown. We report here that inflammation induces the accumulation of CD11b+Gr1+ myeloid-derived suppressor cells (MDSCs) that express high levels of IL-10 in colon tissue. IL-10 induces the activation of STAT3 that directly binds to the Dnmt1 and Dnmt3b promoters to activate their expression, resulting in DNA hypermethylation at the Irf8 promoter to silence IRF8 expression in colon epithelial cells. Mice with Irf8 deleted in colonic epithelial cells exhibit significantly higher inflammation-induced tumor incidence. Human colorectal carcinomas have significantly higher DNMT1 and DNMT3b and lower IRF8 expression, and they exhibit significantly higher IRF8 promoter DNA methylation than normal colon. Our data identify the MDSC-IL-10-STAT3-DNMT3b-IRF8 pathway as a link between chronic inflammation and colon cancer initiation.
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Affiliation(s)
- Mohammed L Ibrahim
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
| | - John D Klement
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Chunwan Lu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Priscilla S Redd
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Wei Xiao
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
| | - Dafeng Yang
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Darren D Browning
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta, GA 30912, USA
| | - Phillip J Buckhaults
- Department of Drug Discovery and Biomedical Sciences, the University of South Carolina, Columbia, SC 29208, USA
| | - Herbert C Morse
- Virology and Cellular Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA.
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28
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Larsen RL, Savage NM. How I investigate Eosinophilia. Int J Lab Hematol 2018; 41:153-161. [DOI: 10.1111/ijlh.12955] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 10/31/2018] [Accepted: 11/03/2018] [Indexed: 01/18/2023]
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29
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Xiao W, Ibrahim ML, Redd PS, Klement JD, Lu C, Yang D, Savage NM, Liu K. Loss of Fas Expression and Function Is Coupled with Colon Cancer Resistance to Immune Checkpoint Inhibitor Immunotherapy. Mol Cancer Res 2018; 17:420-430. [PMID: 30429213 DOI: 10.1158/1541-7786.mcr-18-0455] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 08/09/2018] [Accepted: 11/07/2018] [Indexed: 12/28/2022]
Abstract
Despite the remarkable efficacy of immune checkpoint inhibitor (ICI) immunotherapy in various types of human cancers, colon cancer, except for the approximately 4% microsatellite-instable (MSI) colon cancer, does not respond to ICI immunotherapy. ICI acts through activating CTLs that use the Fas-FasL pathway as one of the two effector mechanisms to suppress tumor. Cancer stem cells are often associated with resistance to therapy including immunotherapy, but the functions of Fas in colon cancer apoptosis and colon cancer stem cells are currently conflicting and highly debated. We report here that decreased Fas expression is coupled with a subset of CD133+CD24lo colon cancer cells in vitro and in vivo. Consistent of the lower Fas expression level, this subset of CD133+CD24loFaslo colon cancer cells exhibits decreased sensitivity to FasL-induced apoptosis. Furthermore, FasL selectively enriches CD133+CD24loFaslo colon cancer cells. CD133+CD24loFaslo colon cancer cells exhibit increased lung colonization potential in experimental metastatic mouse models and decreased sensitivity to tumor-specific CTL adoptive transfer and ICI immunotherapies. Interestingly, FasL challenge selectively enriched this subset of colon cancer cells in microsatellite-stable (MSS) but not in the MSI human colon cancer cell lines. Consistent with the downregulation of Fas expression in CD133+CD24lo cells, lower Fas expression level is significantly correlated with decreased survival in patients with human colon cancer. IMPLICATIONS: Our data determine that CD133+CD24loFaslo colon cancer cells are capable to evade Fas-FasL cytotoxicity of tumor-reactive CTLs and targeting this subset of colon cancer cells is potentially an effective approach to suppress colon cancer immune evasion.
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Affiliation(s)
- Wei Xiao
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia
| | - Mohammed L Ibrahim
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia.,Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia
| | - Priscilla S Redd
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia.,Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia.,Charlie Norwood VA Medical Center, Augusta, Georgia
| | - John D Klement
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia.,Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia.,Charlie Norwood VA Medical Center, Augusta, Georgia
| | - Chunwan Lu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia.,Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia.,Charlie Norwood VA Medical Center, Augusta, Georgia
| | - Dafeng Yang
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia.,Charlie Norwood VA Medical Center, Augusta, Georgia
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta, Georgia
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, Georgia. .,Georgia Cancer Center, Medical College of Georgia, Augusta, Georgia.,Charlie Norwood VA Medical Center, Augusta, Georgia
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30
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Hu T, Chong Y, Lu S, Qin H, Ren M, Savage NM, Chang CS, Cowell JK. Loss of the BCR-FGFR1 GEF Domain Suppresses RHOA Activation and Enhances B-Lymphomagenesis in Mice. Cancer Res 2018; 79:114-124. [PMID: 30413411 DOI: 10.1158/0008-5472.can-18-1889] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/10/2018] [Accepted: 11/06/2018] [Indexed: 02/04/2023]
Abstract
Transformation of hematopoietic stem cells by the BCR-FGFR1 fusion kinase found in a variant of stem cell leukemia/lymphoma (SCLL) syndrome leads to development of B-lymphomas in syngeneic mice and humans. In this study, we show that the relatively rapid onset of this leukemia is potentially related to oncogenic domains within the BCR component. BCR recruited a guanidine nucleotide exchange factor (GEF) domain to the fusion kinase to facilitate activation of small GTPases such as the Ras homology gene family, member A (RHOA). Deletion of this GEF domain increased leukemogenesis, enhanced cell survival and proliferation, and promoted stem cell expansion and lymph node metastasis. This suggests that, in an SCLL context, the presence of the endogenous GEF motif leads to reduced leukemogenesis. Indeed, loss of the GEF domain suppressed activation of RHOA and PTEN, leading to increased activation of AKT. Loss of the GEF domain enhanced cell proliferation and invasion potential, which was also observed in cells in which RHOA is knocked down, supported by the observation that overexpression of RHOA leads to reduced viability and invasion. In vivo depletion of RHOA in SCLL cells significantly increased disease progression and shortened latency. Collectively, these data show that the BCR GEF domain affects phenotypes associated with progression of SCLL through suppression of RHOA signaling. SIGNIFICANCE: RHOA activation is a critical event in the progression of BCR-FGFR1-driven leukemogenesis in stem cell leukemia and lymphoma syndrome and is regulated by the BCR GEF domain.
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Affiliation(s)
| | | | - Sumin Lu
- Georgia Cancer Center, Augusta, Georgia
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31
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Chaffin JM, Savage NM, Sharma S, Bryan LJ, Raffeld M, Jaffe ES. Persistent indolent pancolonic marginal zone lymphoma of MALT-type with plasmacytic differentiation - A rare post-transplant lymphoma? Hum Pathol (N Y) 2017; 10:74-78. [PMID: 32064225 PMCID: PMC7019211 DOI: 10.1016/j.ehpc.2017.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) is associated with chronic inflammatory disorders. We present an indolent pancolonic MALT lymphoma occurring in a 39-year-old female with history of autoimmune hepatitis requiring liver transplant in 1997 and ulcerative colitis diagnosed in 2004. Random biopsies from a grossly unremarkable surveillance colonoscopy in 2015 revealed a dense monomorphic plasmacytoid infiltrate causing expansion of lamina propria without significant crypt infiltration or destruction. These cells were positive for CD79a and CD138 and showed lambda restriction; however, CD20, CD43, CD56, HHV8, and EBER were negative. A similar pancolonic infiltrate was identified in all prior colorectal biopsies from 2010 and 2012 upon retrospective review. Subsequent computed tomography of the abdomen revealed no bowel wall thickening nor enlarged lymph nodes. Bone marrow revealed involvement consistent with stage IV disease. Biopsies from 2010 and 2015 demonstrated clonal immunoglobulin gene rearrangement. MYD88 mutation was not detected. The overall features were indicative of MALT lymphoma. Although low-grade B-cell lymphomas are not considered part of the post-transplant lymphoproliferative disorder spectrum, such cases have been reported, and are typically EBV-negative. Patient underwent treatment with pentostatin for her MALT lymphoma reaching a sustained remission despite additional immunosuppression for resurgent hepatic dysfunction. To our knowledge, this is the first reported case of EBV-negative pancolonic MALT lymphoma with plasmacytic differentiation post liver transplant presenting in an indolent, asymptomatic fashion with persistence for greater than five years successfully managed without compromising the patient's liver transplant.
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Affiliation(s)
- Joanna M. Chaffin
- Department of Pathology, Medical College of Georgia, Augusta University, 1120, 15th Street, Augusta, GA 30912, United States
| | - Natasha M. Savage
- Department of Pathology, Medical College of Georgia, Augusta University, 1120, 15th Street, Augusta, GA 30912, United States
| | - Suash Sharma
- Department of Pathology, Medical College of Georgia, Augusta University, 1120, 15th Street, Augusta, GA 30912, United States
| | - Locke J. Bryan
- Department of Hematology/Oncology, Medical College of Georgia, Augusta University, 1120, 15th Street, Augusta, GA, 30912, United States
| | - Mark Raffeld
- Center for Cancer Research, National Cancer Institute, Bethesda, MD, United States
| | - Elaine S. Jaffe
- Center for Cancer Research, National Cancer Institute, Bethesda, MD, United States
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32
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Mangaonkar A, Mondal AK, Fulzule S, Pundkar C, Park EJ, Jillella A, Kota V, Xu H, Savage NM, Shi H, Munn D, Kolhe R. A novel immunohistochemical score to predict early mortality in acute myeloid leukemia patients based on indoleamine 2,3 dioxygenase expression. Sci Rep 2017; 7:12892. [PMID: 29038460 PMCID: PMC5643528 DOI: 10.1038/s41598-017-12940-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/20/2017] [Indexed: 12/16/2022] Open
Abstract
Indoleamine 2,3 dioxygenase-1 (IDO-1) is an enzyme in the kynurenine pathway which augments tumor-induced immune tolerance. Previous studies in childhood acute myeloid leukemia (AML) have shown a negative correlation of IDO-1 mRNA expression with outcomes. The aim of our study was to develop a practical and objective immunohistochemical technique to quantify IDO-1 expression on diagnostic bone marrow biopsies of AML patients in order to facilitate its use in routine clinical practice. IDO-1 mRNA was extracted from diagnostic bone marrow specimens from 29 AML patients. IDO-1 protein expression was assessed in 40 cases via immunohistochemistry and quantified by a novel ‘composite IDO-1 score’. In a univariate analysis, higher age (p = 0.0018), male gender (p = 0.019), high risk cytogenetics (p = 0.002), higher IDO-1 mRNA (p = 0.005), higher composite IDO-1 score (p < 0.0001) and not undergoing allogeneic stem cell transplant (SCT, p = 0.0005) predicted poor overall survival. In a multivariate model that included the aforementioned variables, higher composite IDO-1 score (p = 0.007) and not undergoing allogeneic SCT (p = 0.007) was found to significantly predict poor outcomes. Further, patients who failed induction had higher composite IDO-1 score (p = 0.01). In conclusion, ‘composite IDO-1 score’ is a prognostic tool that can help identify a certain subset of AML patients with ‘early mortality’. This unique subset of patients can potentially benefit from specific IDO-1 inhibitor therapy, currently in clinical trials.
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Affiliation(s)
| | - Ashis Kumar Mondal
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, USA
| | - Sadanand Fulzule
- Department of Orthopedics, Medical College of Georgia at Augusta University, Augusta, USA
| | - Chetan Pundkar
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, USA
| | - Eun Jeong Park
- Georgia Cancer Center, Medical College of Georgia at Augusta University, Augusta, USA
| | - Anand Jillella
- Georgia Cancer Center, Medical College of Georgia at Augusta University, Augusta, USA
| | - Vamsi Kota
- Department of Hematology and Medical Oncology, Emory University, Atlanta, USA
| | - Hongyan Xu
- Department of Population Health Sciences, Medical College of Georgia at Augusta University, Augusta, USA
| | - Natasha M Savage
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, USA
| | - Huidong Shi
- Georgia Cancer Center, Medical College of Georgia at Augusta University, Augusta, USA.,Department of Biochemistry and Molecular Biology, Medical College of Georgia at Augusta University, Augusta, USA
| | - David Munn
- Georgia Cancer Center, Medical College of Georgia at Augusta University, Augusta, USA.,Department of Pediatrics, Medical College of Georgia at Augusta University, Augusta, USA
| | - Ravindra Kolhe
- Department of Pathology, Medical College of Georgia at Augusta University, Augusta, USA.
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Klement JD, Paschall AV, Savage NM, Nayak-Kapoor A, Liu K. 5- Fluorouracil regulation of myeloid-derived suppressor cell differentiation in vitro and in vivo. The Journal of Immunology 2017. [DOI: 10.4049/jimmunol.198.supp.205.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
The chemotherapeutic agent 5-fluorouracil (5-FU) is the standard therapy for patients with advanced colorectal cancer (CRC). 5-FU not only targets tumor cells for apoptosis but also induces apoptosis in myeloid cells, leading to myelosuppression, which has long been thought as a side effect of 5-FU therapy. Myeloid-derived suppressive cells (MDSCs) are a heterogeneous population of immature myeloid cells that exhibit potent suppressive activity to inhibit T and NK cell function. Recent studies have found that 5-FU suppresses MDSCs in mouse models. However, we observed that MDSCs still massively accumulate in human CRC patients after multiple rounds of 5-FU therapy. We hypothesize that a subset of the heterogeneous MDSCs is resistant to 5-FU and that 5-FU therapy selectively eliminates the sensitive MDSCs, enriching the 5-FU-resistant MDSCs. To test this hypothesis, we made use of both in vitro BM-derived MDSC (BM-MDSC) and in vivo mouse tumor models. We observed that 5-FU therapy significantly decreases CD11b+Gr1+ MDSC accumulation in an orthotopic colon cancer mouse model. BM-MDSCs can be induced by cytokines, including GM-CSF, G-CSF, M-CSF and IL-6, either alone or in combination. Cytological analysis indicates that various cytokines induce BM-MDSC to differentially acquire the morphological appearance of myeloid cell subsets, including macrophage- and granulocyte-like cells. Interestingly, all of these BM-derived MDSCs display resistance to 5-FU-induced apoptosis in vitro following exposure to 5-FU at doses as high as 10 μg/mL. Our data indicates that some MDSC subsets display resistance to 5-FU, providing a rationale to explain the enrichment of MDSCs in human CRC patients following successive treatments with 5-FU.
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Affiliation(s)
| | | | | | | | - Kebin Liu
- 1Augusta University
- 2Charlie Norwood VA Medical Center
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34
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Lu C, Talukder A, Savage NM, Singh N, Liu K. JAK-STAT-mediated chronic inflammation impairs cytotoxic T lymphocyte activation to decrease anti-PD-1 immunotherapy efficacy in pancreatic cancer. Oncoimmunology 2017; 6:e1291106. [PMID: 28405527 DOI: 10.1080/2162402x.2017.1291106] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/27/2017] [Accepted: 01/31/2017] [Indexed: 12/14/2022] Open
Abstract
Human pancreatic cancer does not respond to immune check point blockade immunotherapy. One key feature of pancreatic cancer is the association between its progression and chronic inflammation. Emerging evidence supports a key role for the JAK-STAT pathway in pancreatic cancer inflammation. We aimed at testing the hypothesis that sustained JAK-STAT signaling suppresses cytotoxic T lymphocyte (CTL) activation to counteract anti-PD-1 immunotherapy-induced CTL activity in pancreatic cancer. We show that human pancreatic carcinomas express high level of PD-L1 and exhibit low level of CTL infiltration. JAK-STAT inhibitor Ruxolitinib selectively inhibits STAT1 and STAT3 activation and increases CTL infiltration to induce a Tc1/Th1 immune response in the tumor microenvironment in an orthotopic pancreatic cancer mouse model. Ruxilitinib-mediated tumor suppressive efficacy diminishes in T-cell-deficient mice. Pancreatic tumor grows significantly faster in IFNγ-deficient mice. However, neutralizing IFNγ does not alter tumor growth but diminishes Ruxolitinib-induced tumor suppression in vivo, indicating that lymphocytes and IFNγ are essential for Ruxolitinib-induced host antitumor immune response. Both type I and type II interferons upregulate PD-L1 expression through the JAK-STAT signaling pathway in mouse pancreatic tumor cells. Tumor cells respond to activated T cells by activating STAT3. The inhibition of STAT3 downregulates immune suppressive cytokines production by tumor cells, resulting in increased T cell activation and effector function. Consequently, Ruxolitinib significantly improves the efficacy of anti-PD-1 immunotherapy. Our data demonstrate that Ruxolitinib is effective in the inhibition of systemic inflammation in the tumor microenvironment and therefore upregulates CTL infiltration and activation to overcome pancreatic cancer resistance to anti-PD-1 immunotherapy.
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Affiliation(s)
- Chunwan Lu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA, USA; Georgia Cancer Center, Augusta, GA, USA; Charlie Norwood VA Medical Center, Augusta, GA, USA
| | - Asif Talukder
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA, USA; Department of Surgery, Pathology, Medical College of Georgia, Augusta, GA, USA
| | | | - Nagendra Singh
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA, USA; Georgia Cancer Center, Augusta, GA, USA
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA, USA; Georgia Cancer Center, Augusta, GA, USA; Charlie Norwood VA Medical Center, Augusta, GA, USA
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35
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Ren M, Qin H, Wu Q, Savage NM, George TI, Cowell JK. Development of ZMYM2-FGFR1 driven AML in human CD34+ cells in immunocompromised mice. Int J Cancer 2016; 139:836-40. [PMID: 27005999 DOI: 10.1002/ijc.30100] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 02/22/2016] [Accepted: 03/17/2016] [Indexed: 12/14/2022]
Abstract
Acute myelogenous leukemia (AML) has an overall poor survival rate and shows considerable molecular heterogeneity in its etiology. In the WHO classification there are >50 cytogenetic subgroups of AML, many showing highly specific chromosome translocations that lead to constitutive activation of individual kinases. In a rare stem cell leukemia/lymphoma syndrome, translocations involving 8p11 lead to constitutive activation of the fibroblast growth factor receptor 1 (FGFR1) kinase. This disorder shows myeloproliferative disease with almost invariable progresses to AML and conventional therapeutic strategies are largely unsuccessful. Because of the rare nature of this syndrome, models that faithfully recapitulate the human disease are needed to evaluate therapeutic strategies. The t(8;13)(p11;q12) chromosome translocation is most common rearrangement seen in this syndrome and creates a ZMYM2-FGFR1 chimeric kinase. To understand more about the molecular etiology of AML induced by this particular rearrangement, we have created a model human CD34+ cells transplanted into immunocompromized mice which develop myeloproliferative disease that progresses to AML with a long (>12 months) latency period. As in humans, these mice show hepatospenomegaly, hypercellular bone marrow and a CD45 + CD34 + CD13+ immunophenotype. Molecular studies demonstrate upregulation of genes such as KLF4 and FLT3 that promote stemness, and overexpression of MYC, which is associated with suppression of myeloid cell differentiation. This murine model, therefore, provides an opportunity to develop therapeutic strategies against the most common subtype within these FGFR1 driven neoplasms and study the molecular etiology in more depth.
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Affiliation(s)
- Mingqiang Ren
- Georgia Regents University Cancer Center, Augusta, GA
| | - Haiyan Qin
- Georgia Regents University Cancer Center, Augusta, GA
| | - Qing Wu
- Georgia Regents University Cancer Center, Augusta, GA
| | - Natasha M Savage
- Georgia Regents University Cancer Center, Augusta, GA.,GRU Department of Pathology, Augusta, GA
| | - Tracy I George
- Department of Pathology, University of New Mexico, Albuquerque, NM
| | - John K Cowell
- Georgia Regents University Cancer Center, Augusta, GA
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Shi M, Savage NM, Salman H, Morice WG. A case of lymphoproliferative disorder of NK-cells: aggressive immunophenotype but indolent behavior. Clin Case Rep 2015; 3:740-3. [PMID: 26401278 PMCID: PMC4574789 DOI: 10.1002/ccr3.333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 05/31/2015] [Accepted: 06/24/2015] [Indexed: 01/22/2023] Open
Abstract
Distinguishing chronic lymphoproliferative disorder of NK-cells from aggressive NK-cell leukemia is critical because they have distinct clinical course and management. Immunophenotyping plays a key role in distinguishing these two entities, however, it could not be used as sole criteria and clinical/laboratory findings are equally important.
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Affiliation(s)
- Min Shi
- Division of Hematopathology, Department of Laboratory Medicine and Pathology, Mayo Clinic200 First Street SW, Rochester, Minnesota, 55905
| | - Natasha M Savage
- Department of Pathology, Georgia Regents University1120 15th Street, Augusta, Georgia, 30912
| | - Huda Salman
- Division of Hematology/Oncology, Department of Medicine, Georgia Regents University1120 15th Street, Augusta, Georgia, 30912
| | - William G Morice
- Division of Hematopathology, Department of Laboratory Medicine and Pathology, Mayo Clinic200 First Street SW, Rochester, Minnesota, 55905
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37
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Rogers HJ, Vardiman JW, Anastasi J, Raca G, Savage NM, Cherry AM, Arber D, Moore E, Morrissette JJD, Bagg A, Liu YC, Mathew S, Orazi A, Lin P, Wang SA, Bueso-Ramos CE, Foucar K, Hasserjian RP, Tiu RV, Karafa M, Hsi ED. Complex or monosomal karyotype and not blast percentage is associated with poor survival in acute myeloid leukemia and myelodysplastic syndrome patients with inv(3)(q21q26.2)/t(3;3)(q21;q26.2): a Bone Marrow Pathology Group study. Haematologica 2014; 99:821-9. [PMID: 24463215 DOI: 10.3324/haematol.2013.096420] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Acute myeloid leukemia and myelodysplastic syndrome with inv(3)(q21q26.2)/t(3;3)(q21;q26.2) have a poor prognosis. Indeed, the inv(3)(q21q26.2)/t(3;3)(q21;q26.2) has been recognized as a poor risk karyotype in the revised International Prognostic Scoring System. However, inv(3)(q21q26.2)/t(3;3)(q21;q26.2) is not among the cytogenetic abnormalities pathognomonic for diagnosis of acute myeloid leukemia irrespective of blast percentage in the 2008 WHO classification. This multicenter study evaluated the clinico-pathological features of acute myeloid leukemia/myelodysplastic syndrome patients with inv(3)(q21q26.2)/t(3;3)(q21;q26.2) and applied the revised International Prognostic Scoring System to myelodysplastic syndrome patients with inv(3)(q21q26.2)/t(3;3)(q21;q26.2). A total of 103 inv(3)(q21q26.2)/t(3;3)(q21;q26.2) patients were reviewed and had a median bone marrow blast count of 4% in myelodysplastic syndrome (n=40) and 52% in acute myeloid leukemia (n=63) (P<0.001). Ninety-one percent of patients showed characteristic dysmegakaryopoiesis. There was no difference in overall survival between acute myeloid leukemia and myelodysplastic syndrome patients with inv(3)(q21q26.2)/t(3;3)(q21;q26.2) (12.9 vs. 7.9 months; P=0.16). Eighty-three percent of patients died (median follow up 7.9 months). Complex karyotype, monosomal karyotype and dysgranulopoiesis (but not blast percentage) were independent poor prognostic factors in the entire cohort on multivariable analysis. The revised International Prognostic Scoring System better reflected overall survival of inv(3)(q21q26.2)/t(3;3)(q21;q26.2) than the International Prognostic Scoring System but did not fully reflect the generally dismal prognosis. Our data support consideration of myelodysplastic syndrome with inv(3)(q21q26.2)/t(3;3)(q21;q26.2) as an acute myeloid leukemia with recurrent genetic abnormalities, irrespective of blast percentage.
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Johnson RC, Savage NM, Chiang T, Gotlib JR, Cherry AM, Arber DA, George TI. Hidden mastocytosis in acute myeloid leukemia with t(8;21)(q22;q22). Am J Clin Pathol 2013; 140:525-35. [PMID: 24045550 DOI: 10.1309/ajcp1q0ysxeahnkk] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
OBJECTIVES To assess the frequency of systemic mastocytosis (SM) in a large series of acute myeloid leukemia (AML) with t(8;21)(q22;q22). METHODS We retrospectively characterized 40 bone marrow aspirate smears and biopsy specimens from patients with AML with t(8;21) for the presence of SM. Cases were assessed for mast cell morphology and immunohistochemistry, as well as KIT exon 8 and 17 mutational assessment by reverse transcription polymerase chain reaction. RESULTS Four patients met criteria for SM, 1 met criteria for myelomastocytic leukemia, and 8 demonstrated the benign finding of mast cell hyperplasia. CONCLUSIONS We recommend examining all cases of AML with t(8;21) for the presence of SM via morphology, immunophenotyping, and KIT mutational analysis studies.
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Affiliation(s)
- Ryan C. Johnson
- Department of Pathology, Stanford University School of Medicine, Stanford, CA
| | - Natasha M. Savage
- Department of Pathology, Georgia Health Sciences University, Augusta, GA
| | - Tsoyu Chiang
- Department of Pathology, Stanford University School of Medicine, Stanford, CA
| | - Jason R. Gotlib
- Department of Medicine (Hematology), Stanford University School of Medicine, Stanford, CA
| | - Athena M. Cherry
- Department of Pathology, Stanford University School of Medicine, Stanford, CA
| | - Daniel A. Arber
- Department of Pathology, Stanford University School of Medicine, Stanford, CA
| | - Tracy I. George
- Department of Pathology, Stanford University School of Medicine, Stanford, CA
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Savage NM, Johnson RC, Gotlib J, George TI. Myeloid and lymphoid neoplasms with FGFR1 abnormalities: diagnostic and therapeutic challenges. Am J Hematol 2013; 88:427-30. [PMID: 22886804 DOI: 10.1002/ajh.23296] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 06/02/2012] [Accepted: 06/15/2012] [Indexed: 12/20/2022]
Affiliation(s)
- Natasha M. Savage
- Department of Pathology; Georgia Health Sciences University and Charlie Norwood VA Medical Center; Augusta; Georgia
| | - Ryan C. Johnson
- Department of Pathology; Stanford University School of Medicine; Stanford; California
| | - Jason Gotlib
- Division of Hematology; Department of Medicine; Stanford University School of Medicine; Stanford; California
| | - Tracy I. George
- Department of Pathology; Stanford University School of Medicine; Stanford; California
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Savage NM, Johnson RC, Natkunam Y. The spectrum of lymphoblastic, nodal and extranodal T-cell lymphomas: characteristic features and diagnostic dilemmas. Hum Pathol 2012; 44:451-71. [PMID: 22658223 DOI: 10.1016/j.humpath.2012.02.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 02/02/2012] [Accepted: 02/03/2012] [Indexed: 11/18/2022]
Abstract
T-cell lymphomas represent a heterogeneous group of neoplasms that encompass considerable clinical, morphologic, and immunophenotypic variation. The diagnosis of T-cell lymphoma is challenging because of its relative rarity, the lack of an immunophenotypic marker of clonality, and significant morphologic overlap with infectious/inflammatory processes and neoplasms, including Hodgkin and other non-Hodgkin lymphomas, and even mesenchymal or epithelial lesions. In the current World Health Organization classification of hematopoietic tumors, all except 1 subtype (ie, T-lymphoblastic lymphoma) are recognized as mature neoplasms derived from postthymic T cells. In addition to T-lymphoblastic lymphoma, this review will focus on nodal and extranodal T-cell lymphomas and exclude T-cell lymphomas presenting primarily in the skin. Extranodal natural-killer-cell/T-cell lymphoma, nasal type, will also be discussed because the derivation of this lymphoma from natural killer and natural killer-like T cells shows morphologic and immunophenotypic features that overlap with other T-cell lymphomas. In this review, we discuss the salient clinicopathologic, immunophenotypic, and genetic features, as well as our approaches to the diagnosis of lymphoblastic, nodal, and extranodal T-cell lymphomas.
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MESH Headings
- Clone Cells
- Cloning, Molecular
- Female
- Gene Rearrangement, T-Lymphocyte
- Humans
- Immunophenotyping
- Killer Cells, Natural/immunology
- Killer Cells, Natural/pathology
- Lymph Nodes/pathology
- Lymphoma, T-Cell, Peripheral/diagnosis
- Lymphoma, T-Cell, Peripheral/genetics
- Lymphoma, T-Cell, Peripheral/immunology
- Male
- Nose Neoplasms/diagnosis
- Nose Neoplasms/genetics
- Nose Neoplasms/immunology
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnosis
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/immunology
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/diagnosis
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/immunology
- Translocation, Genetic
- World Health Organization
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Affiliation(s)
- Natasha M Savage
- Department of Pathology, L235, Stanford University School of Medicine, Stanford, CA 94305-5324, USA.
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41
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Ustun C, Savage NM, Gotlib J, Bhalla K, Manaloor E, George TI. Systemic mastocytosis with associated clonal hematological non-mast-cell lineage disease: a case review. Am J Hematol 2012; 87:191-3. [PMID: 22081475 DOI: 10.1002/ajh.22208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 09/20/2011] [Accepted: 09/27/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Celalettin Ustun
- Division of Hematology Oncology and Transplantation, Department of Medicine, University of Minnesota, Twin Cities, MN, USA
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42
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Savage NM, Alleyne CH, Vender JR, Figueroa R, Zhang H, Samuel TA, Sharma S. Dural-based metastatic carcinomas mimicking primary CNS neoplasia: report of 7 cases emphasizing the role of timely surgery and accurate pathologic evaluation. Int J Clin Exp Pathol 2011; 4:530-540. [PMID: 21738825 PMCID: PMC3127075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Accepted: 06/15/2011] [Indexed: 05/31/2023]
Abstract
Clinical presentation with dural-based metastasis mimicking meningiomas is rare. We aimed to evaluate the role of frozen section in guiding surgery and histopathologic diagnosis in determining primary sites of dural-based metastatic carcinomas. Following the receipt of HAC approval, we retrospectively reviewed 7cases presenting with dural-based masses clinically suspected to be primary brain tumors (6 meningiomas and 1 superficial glioblastoma), but diagnosed to be metastatic carcinomas on subsequent resection. Pertinent clinical records and follow-up data were reviewed. Patient's age ranged from 59 to 80 years. Imaging showed extra-axial dural-based masses with contiguous but not primary brain involvement. On intra-operative frozen section (not performed in case 7), differential diagnoses included metastatic carcinoma in all cases, and surgery modified accordingly. Nesting, cribriform, and "picket-fence" like glands were among useful histologic diagnostic patterns. Immunoprofile supported histologic diagnosis in all cases. Subsequent clinical and radiologic evaluation confirmed coexistent sites of origin in all cases. The metastases were solitary in all cases; except multiple dural-based tumors in case 1, in which interestingly no systemic metastasis were identified. Dural-based metastatic carcinomas mimicking meningiomas may be solitary, of unknown primary, or without concomitant systemic spread on imaging. Frozen section evaluation is helpful in modifying surgery. Although high-grade, these are typically differentiated enough to allow accurate histopathologic diagnosis, and reasonable determination of primary tumor site, especially with a judicious panel of cytokeratins, transcription factors, hormone receptors and relatively organ-specific markers. Clinicians and pathologists need to be aware of the occurrence, spectrum, need for timely intervention, and accurate diagnosis of dural-based metastatic carcinomas.
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Affiliation(s)
- Natasha M Savage
- Pathology, Georgia Health Sciences University, Augusta, Georgia, USA.
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Savage NM, Crosby JH, Reid-Nicholson MD. The cytologic findings in choroid plexus carcinoma: Report of a case with differential diagnosis. Diagn Cytopathol 2010; 40:1-6. [DOI: 10.1002/dc.21478] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Accepted: 06/03/2010] [Indexed: 11/06/2022]
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Savage NM, Kota V, Manaloor EJ, Kulharya AS, Pierini V, Mecucci C, Ustun C. Acute leukemia with PICALM-MLLT10 fusion gene: diagnostic and treatment struggle. ACTA ACUST UNITED AC 2010; 202:129-32. [PMID: 20875875 DOI: 10.1016/j.cancergencyto.2010.07.126] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 07/06/2010] [Accepted: 07/11/2010] [Indexed: 02/01/2023]
Abstract
Patients with various hematologic malignancies, including acute lymphoblastic leukemia (ALL), acute myeloblastic leukemia (AML), diffuse histiocytic lymphoma, and granulocytic sarcoma, have sometimes been shown to carry the PICALM-MLLT10 fusion gene (alias CALM-AF10) by various cytogenetic methodologies. Cases with the PICALM-MLLT10 fusion gene can involve a diagnostic dilemma for the following reasons: (1) the fusion gene occurs very rarely, (2) the cases do not have a distinct myeloid or lymphoid morphology and cells often appear immature, (3) cases usually have a mixed T-cell and myeloid phenotype, and (4) cases often have a mixed clinical presentation (e.g., mediastinal mass in a patient with AML). A 27-year-old woman was diagnosed with AML with the PICALM-MLLT10 fusion gene. The patient was treated on an AML regimen and achieved a complete remission. Although the reported treatment of these patients varies greatly, outcome remains very poor in the vast majority. Furthermore, central nervous system involvement at diagnosis and relapse are reported in pediatric populations. Routine acute leukemia fluorescence in situ hybridization panels do not include a probe for the PICALM-MLLT10 fusion gene, and therefore diagnosis can be made only when karyotyping is available; that delay can result in initial misdiagnosis and mistreatment. The case report and literature review here (including discussion of the poor prognosis and of management, including CNS prophylaxis) are intended to raise awareness and to inform about PICALM-MLLT10 in acute leukemia.
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Affiliation(s)
- Natasha M Savage
- Department of Pathology, Medical College of Georgia, Augusta, GA 30912, USA.
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Savage NM, Shah H, Alleyne CH, Switzer JA, Lee JR, Steele J, Sharma S. Neurosarcoidosis with necrotising sarcoid granulomatosis mimicking meningiomatosis cerebri: case report and literature search. BMJ Case Rep 2009; 2009:bcr11.2008.1187. [PMID: 21686425 DOI: 10.1136/bcr.11.2008.1187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A 52-year-old woman presented with headaches, difficulty with word finding and left eye blindness. MRI showed enhancing frontal dural-based masses suggestive of meningiomatosis. Biopsy and debulking revealed necrotising granulomas, without discernible micro-organisms or neoplasia; a thorough clinical work-up was negative for infection and vasculitis. A CT scan showed mild bilateral hilar lymphadenopathy, a tiny pulmonary nodule and cirrhotic liver. Her subsequent alteration of mental status was attributed to hepatic encephalopathy based upon elevated aminotransferase and ammonia levels, biopsy evidence of hepatoportal sclerosis with rare granulomas and response to lactulose. A diagnosis of neurosarcoidosis of the necrotising sarcoid granulomatosis variant (NS-NSG) with atypical systemic involvement was made. This is the fifth case report of NS-NSG clinically mimicking a neoplasm and histologically mimicking a mycobacterial infection. NS-NSG can have an atypical clinical picture including intracranial masses; a thorough work-up to exclude infectious and other non-infectious aetiologies is a prerequisite to its diagnosis.
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Affiliation(s)
- Natasha M Savage
- Medical College of Georgia, Pathology, BAE 2571, 1120 15th Street, Augusta, Georgia, 30912, USA
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Abstract
A fetus with severe sacral agenesis and intrauterine growth retardation, ascertained at prenatal diagnosis, was found to be carrying an unbalanced form of a paternal balanced reciprocal translocation (7;19)(q36.1;q13.43), resulting in functional monosomy for 7q36.1-->qter. Necropsy confirmed that the fetus had isolated sacral agenesis type II. A critical region for autosomal dominant sacral agenesis has recently been mapped to the 7q36 region. This case provides further evidence for a sacral agenesis locus in this region and may help to refine the critical region further.
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Affiliation(s)
- N M Savage
- Wessex Regional Genetics Laboratory, Salisbury District Hospital, Wiltshire, UK
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