scholarly journals Combining TrkA Immunohistochemical-Score with Clinicopathologic Parameters in Neuroblastoma: An Influential Prognostic Nomogram

2021 ◽  
Author(s):  
Juanqing Yue ◽  
Lei Cai ◽  
Ruifen Wang ◽  
Meng Qiao ◽  
Kezhou Wang ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Prognostic Factor ◽  
Fluorescence In Situ Hybridization ◽  
Gene Fusion ◽  
Independent Prognostic Factor ◽  
Clinical Samples ◽  
Qrt Pcr ◽  
Clinicopathologic Parameters ◽  
Low Expression

Abstract BackgroundNeuroblastoma (NB) is one of the most common solid tumors in children with varied clinical outcomes. Although there are some several risk stratification systems currently, their clinical applications are limited due to the testing conditions of different laboratory and the heavy financial burden on patients. TrkA is coded by NTRK1 , belonging to tropomyosin receptor kinase family. We have observed that TrkA was differentially expressed in paraffin tissue sections of NB. The aim of this study was to determine the immunohistochemical-score of TrkA as an independent prognostic factor for NB and establish a useful prognostic model for postoperative patients.MethodsWe systematically summarized the relationship between immunochemistry (IHC) score of TrkA and clinicopathological parameters in 86 NB cases. Fluorescence in situ hybridization (FISH) and qRT-PCR were used to detect NTRK1 gene fusion. Furthermore, GSE96631, GSE16476, GSE49710 and GSE73537 datasets, originated from Gene Expression Omnibus (GEO), were analyzed to figure out the NTRK1 related molecular characteristics by bioinformatics methods. And combined TrkA immunohistochemical-score with clinicopathologic parameters to construct a prognostic nomogram of overall survival (OS) for NB.ResultIn clinical samples and GEO database analyses, patients in the NTRK1 / TrkA low expression group showed significantly poorer outcome than patients in high group. Multivariate cox regression analysis demonstrated NTRK1 / TrkA as an independent prognostic factor for NB survival. Neither Fluorescence in situ hybridization nor qRT-PCR detected evidence for NTRK1 gene fusion in clinical samples, indicating that differential expression in NTRK1 / TrkA are caused by epigenetic changes. Bioinformatics analyses revealed that MYC target related pathway may play a critical role in low expression of TrkA, leading to unfavorable prognoses of NB.ConclusionThe results of this study suggest that the IHC score of TrkA may be used as an independent predictor of postoperative OS of patients with NB. By combining the IHC score of TrkA and clinicopathological features, the proposed nomogram provides a feasible predictive tool for postoperative patients with NB. Simultaneously, this study also reveals that Trk inhibitors are not supposed to be taken in NB patients.

scholarly journals A New Subtype of Pre-B Acute Lymphoblastic Leukemia With t(5; 12)(q31q33; p12), Molecularly and Cytogenetically Distinct From t(5; 12) in Chronic Myelomonocytic Leukemia

Blood ◽  
1997 ◽  
Vol 89 (5) ◽  
pp. 1716-1722 ◽  
Author(s):  
Iwona Wlodarska ◽  
Anna Aventı́n ◽  
Júlia Inglés-Esteve ◽  
Daniela Falzetti ◽  
Arnold Criel ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Acute Lymphoblastic Leukemia ◽  
Fluorescence In Situ Hybridization ◽  
Cell Lines ◽  
Chromosomal Abnormality ◽  
Gene Fusion ◽  
Lymphoblastic Leukemia ◽  
Chronic Myelomonocytic Leukemia ◽  
Myelomonocytic Leukemia

Abstract Translocation t(5; 12)(q33; p13), resulting in an ETV6/PDGFRB gene fusion, is a recurrent chromosomal abnormality associated with chronic myelomonocytic leukemia (CMML). An analogous translocation was also found in four cell lines with features of pre-B acute lymphoblastic leukemia (ALL). Using fluorescence in situ hybridization (FISH) we show here that in three of these cell lines identical complex rearrangements occurred. However, the regions involved on 5q and 12p are different from the breakpoints in CMML, and the translocation is accompanied by seemingly identical cryptic deletions of both 5q and 12p chromosome sequences in all analyzed pre-B ALL cell lines. The similar cytogenetic, FISH, and immunophenotyping findings in the three cell lines suggest that the t(5; 12)(q31q33; p12) defines a new entity of pre-B ALL.

Efficacy of Fluorescence In Situ Hybridization for Detecting PML/RARA Gene Fusion in Treated and Untreated Acute Promyelocytic Leukemia

1994 ◽  
Vol 69 (11) ◽  
pp. 1047-1053 ◽  
Author(s):  
CHRIS R. SCHAD ◽  
CURTIS A. HANSON ◽  
ELISABETH PAIETTA ◽  
JAMES CASPER ◽  
SYED M. JALAL ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Fluorescence In Situ Hybridization ◽  
Acute Promyelocytic Leukemia ◽  
Gene Fusion ◽  
Promyelocytic Leukemia

scholarly journals Combined Immunofluorescence (IFA) and Fluorescence In Situ Hybridization (FISH) Assays for Diagnosing Babesiosis in Patients from the USA, Europe and Australia

Diagnostics ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 761
Author(s):  
Jyotsna S. Shah ◽  
Eddie Caoili ◽  
Marie Fe Patton ◽  
Snehal Tamhankar ◽  
Mu Mu Myint ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Fluorescence In Situ Hybridization ◽  
Health Concern ◽  
Babesia Microti ◽  
Clinical Samples ◽  
Serum Antibodies ◽  
Blood Smears ◽  
The Usa ◽  
Human Babesiosis

Apicomplexan parasites of the genus Babesia cause babesiosis in humans and animals worldwide. Human babesiosis is a predominantly zoonotic disease transmitted by hard ticks that is of increasing health concern in the USA and many other countries. Microscopic examination of stained blood smears, detection of serum antibodies by immunoassays and identification of parasite nucleic acid in blood by qPCR and fluorescence in situ hybridization (FISH) are some methods available for diagnosing babesiosis. This study investigated the use of a Babesia genus-specific FISH test for detecting Babesia parasites in blood smears and immunofluorescence assay (IFA) for detecting serum antibodies to Babesia duncani and Babesia microti, two common species that cause human babesiosis in the USA. The findings with clinical samples originating from USA, Australia, Europe and elsewhere demonstrate that the parallel use of Babesia genus-specific FISH and IFA tests for B. duncani and B. microti provides more useful diagnostic information in babesiosis and that B. duncani infections are more widespread globally than presently recognized.

scholarly journals ETV6-RUNX1Rearrangement in Tunisian Pediatric B-Lineage Acute Lymphoblastic Leukemia

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
Abir Gmidène ◽  
Hatem Elghezal ◽  
Hlima Sennana ◽  
Yosra Ben Youssef ◽  
Balkiss Meddeb ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Acute Lymphoblastic Leukemia ◽  
Fluorescence In Situ Hybridization ◽  
Gene Fusion ◽  
Fusion Gene ◽  
Lymphoblastic Leukemia ◽  
Genetic Changes ◽  
Multiple Copies ◽  
B Lineage

In this study, Forty-one out of fifty-seven Tunisian children with B-lineage acute lymphoblastic leukemia (B-ALL), and without cytogenetically detectable recurrent abnormalities at the time of the diagnosis, were evaluated by fluorescence in situ hybridization (FISH) for the t(12;21). This translocation leadsETV6-RUNX1(previouslyTEL-AML1) fusion gene. 16 patients (28%) hadETV6-RUNX1rearrangement. In addition to this rearrangement, two cases showed a loss of the normalETV6allele, and three others showed an extra signal of theRUNX1gene. Seven patients withoutETV6-RUNX1rearrangement showed extra signals of theRUNX1gene. One out of the 7 patients was also associated with a t(3;12) identified by FISH. This is the first Tunisian study in which we report the incidence of t(12;21) among childhood B-lineage ALL and in which we have found multiple copies ofRUNX1. Finally, our findings confirm that additional or secondary genetic changes are commonly encountered in pediatric B-lineage ALL withETV6-RUNX1gene fusion which is envisaged to play a pivotal role in disease progression.

scholarly journals A New Subtype of Pre-B Acute Lymphoblastic Leukemia With t(5; 12)(q31q33; p12), Molecularly and Cytogenetically Distinct From t(5; 12) in Chronic Myelomonocytic Leukemia

Blood ◽  
1997 ◽  
Vol 89 (5) ◽  
pp. 1716-1722
Author(s):  
Iwona Wlodarska ◽  
Anna Aventı́n ◽  
Júlia Inglés-Esteve ◽  
Daniela Falzetti ◽  
Arnold Criel ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Acute Lymphoblastic Leukemia ◽  
Fluorescence In Situ Hybridization ◽  
Cell Lines ◽  
Chromosomal Abnormality ◽  
Gene Fusion ◽  
Lymphoblastic Leukemia ◽  
Chronic Myelomonocytic Leukemia ◽  
Myelomonocytic Leukemia

Translocation t(5; 12)(q33; p13), resulting in an ETV6/PDGFRB gene fusion, is a recurrent chromosomal abnormality associated with chronic myelomonocytic leukemia (CMML). An analogous translocation was also found in four cell lines with features of pre-B acute lymphoblastic leukemia (ALL). Using fluorescence in situ hybridization (FISH) we show here that in three of these cell lines identical complex rearrangements occurred. However, the regions involved on 5q and 12p are different from the breakpoints in CMML, and the translocation is accompanied by seemingly identical cryptic deletions of both 5q and 12p chromosome sequences in all analyzed pre-B ALL cell lines. The similar cytogenetic, FISH, and immunophenotyping findings in the three cell lines suggest that the t(5; 12)(q31q33; p12) defines a new entity of pre-B ALL.

scholarly journals Isolation and Identification of a New Strain of Nervous Necrosis Virus from the Big-belly Seahorse Hippocampus Abdominalis in China

2021 ◽  
Author(s):  
Xinxin Chen ◽  
Jianfei Qi ◽  
Libin He ◽  
Huiyu Luo ◽  
Jinbo Lin ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Fluorescence In Situ Hybridization ◽  
Economic Losses ◽  
Nervous Necrosis Virus ◽  
Necrosis Virus ◽  
Qrt Pcr ◽  
Tissue Homogenates ◽  
Hippocampus Abdominalis ◽  
The Brain

Abstract Background: Betanodaviruses , members of the Nodaviridae family, are the causative agents of viral nervous necrosis (VNN) in fish, resulting in great economic losses worldwide. Methods: In this study, we isolated a virus strain named seahorse nervous necrosis virus (SHNNV) from cultured big-belly seahorses Hippocampus abdominalis in Xiamen city, Fujian Province, China. Cell isolation, PCR detection, phylogenetic analysis, qRT-PCR, fluorescence in situ hybridization (FISH) and histology were used for virus identification and analysis of virus histopathology. Furthermore, an artificial infection experiment was conducted for virulence testing. Results: Brain and eye tissue homogenates of diseased big-belly seahorses were inoculated onto a grouper spleen (GS) cell monolayer at 28°C. Tissue homogenates induced obvious cytopathic effects in GS cells. PCR and sequencing analyses revealed that the virus belonged to Betanodavirus and shared high sequence identity with red-spotted grouper nervous necrosis virus (RGNNV) isolates. qRT-PCR and fluorescence in situ hybridization revealed that SHNNV mainly attacked the brain and eye. Histopathological examination revealed that the virus led to cytoplasmic vacuolation in the brain and retinal tissues. Infection experiments confirmed that SHNNV was highly infectious, causing massive death in big-belly seahorses. Conclusion: A novel seahorse betanodavirus from the big-belly seahorse in China was discovered. This finding will contribute to the development of efficient strategies for disease management in aquaculture.

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