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1.
Chinese Journal of Oncology ; (12): 147-154, 2022.
Article in Chinese | WPRIM | ID: wpr-935194

ABSTRACT

Objective: To screen the different expressed genes between osteosarcoma and normal osteoblasts, and find the key genes for the occurrence and development of osteosarcoma. Methods: The gene expression dataset GSE33382 of normal osteoblasts and osteosarcoma was obtained from Gene Expression Omnibus (GEO) database. The different expressed genes between normal osteoblasts and osteosarcoma were screened by limma package of R language, and the different expressed genes were analyzed by Kyoto encyclopedia of genes and genomes (KEGG) pathway enrichment analysis. The protein interaction network was constructed by the String database, and the network modules in the interaction network were screened by the molecular complex detection (MCODE) plug-in of Cytoscape software. The different expressed genes contained in the first three main modules screened by MCODE were analyzed by gene ontology (GO) using the BiNGO module of Cytoscape software. The MCC algorithm was used to screen the top 10 key genes in the protein interaction network. The gene expression and survival dataset GSE39055 of osteosarcoma was obtained from GEO database, and the survival analysis was performed by Kaplan-Meier method. The data of 48 patients with osteosarcoma treated in the First Affiliated Hospital of Fujian Medical University from January 2005 to December 2015 were selected for verification. The expression of STC2 protein in osteosarcoma was detected by immunohistochemical method, and the survival analysis was carried out combined with the clinical data of the patients. Results: A total of 874 different expressed genes were identified from GSE33382 dataset, including 402 down-regulated genes and 472 up-regulated genes. KEGG enrichment analysis showed that different expressed genes were mainly related to p53 signal pathway, glutathione metabolism, extracellular matrix receptor interaction, cell adhesion molecules, folate tolerance, and cell senescence. The top 10 key genes in the interaction network were GAS6, IL6, RCN1, MXRA8, STC2, EVA1A, PNPLA2, CYR61, SPARCL1 and FSTL3. STC2 was related to the survival rate of patients with osteosarcoma (P<0.05). The results showed that the expression of STC2 protein was related to tumor size and Enneking stage in 48 cases of osteosarcoma. The median survival time of 25 cases with STC2 high expression was 21.4 months, and that of 23 cases with STC2 low expression was 65.4 months. The survival rate of patients with high expression of STC2 was lower than that of patients with low expression of STC2 (P<0.05). Conclusions: Bioinformatics analysis can effectively screen the different expressed genes between osteosarcoma and normal osteoblasts. STC2 is one of the important predictors for the prognosis of osteosarcoma.


Subject(s)
Bone Neoplasms/pathology , Computational Biology/methods , Follistatin-Related Proteins/genetics , Gene Expression Profiling/methods , Gene Expression Regulation, Neoplastic , Humans , Osteosarcoma/pathology
2.
Braz. j. med. biol. res ; 54(2): e9161, 2021. graf
Article in English | LILACS | ID: biblio-1153511

ABSTRACT

Patients with osteosarcoma (OS) usually have poor overall survival because of frequent metastasis. Long non-coding RNAs (lncRNAs) have been reported to be associated with tumorigenesis and metastasis. In this study, we investigated the expression and roles of lncRNA human histocompatibility leukocyte antigen (HLA) complex P5 (HCP5) in OS, aiming to provide a novel molecular mechanism for OS. HCP5 was up-regulated both in OS tissues and cell lines and high expression of HCP5 was associated to low survival in OS patients. Down-regulation of HCP5 inhibited cell proliferation, migration, and invasion, suggesting its carcinogenic role in OS. miR-101 was targeted by HCP5 and its expression was decreased in OS. The inhibitor of miR-101 reversed the impact of HCP5 down-regulation on cell proliferation, apoptosis, and metastasis in OS. Ephrin receptor 7 (EPHA7) was proved to be a target of miR-101 and had ability to recover the effects of miR-101 inhibitor in OS. In conclusion, lncRNA HCP5 knockdown suppressed cell proliferation, migration, and invasion, and induced apoptosis through depleting the expression of EPHA7 by binding to miR-101, providing a potential therapeutic strategy of HCP5 in OS.


Subject(s)
Humans , Bone Neoplasms/genetics , Bone Neoplasms/pathology , Osteosarcoma/genetics , Osteosarcoma/pathology , MicroRNAs/metabolism , RNA, Long Noncoding/genetics , Down-Regulation , Gene Expression Regulation, Neoplastic , Cell Movement , Receptor, EphA7/metabolism , Cell Line, Tumor , Cell Proliferation , Neoplasm Invasiveness
3.
Säo Paulo med. j ; 137(5): 423-429, Sept.-Oct. 2019. tab, graf
Article in English | LILACS | ID: biblio-1059103

ABSTRACT

ABSTRACT BACKGROUND: Osteosarcoma is the most prevalent malignant bone tumor in children and adolescents. Lung metastases are associated with poor prognosis. OBJECTIVE: The aim here was to explore the prevalence of and risk and prognostic factors for lung metastases in high-grade osteosarcoma patients. DESIGN AND SETTING: Retrospective cohort study based on the Surveillance, Epidemiology and End Results (SEER) database in the United States. METHODS: Data on 1,408 high-grade osteosarcoma patients registered in the SEER database between 2010 and 2015 were extracted. From these, all patients with high-grade osteosarcoma and initial lung metastasis were selected for analysis on risk and prognostic factors for lung metastases. Overall survival was estimated. RESULTS: There were 238 patients (16.90%) with lung metastases at diagnosis. Axial location, tumor size > 10 cm (odds ratio, OR 3.19; 95% confidence interval, CI: 1.58-6.45), higher N stage (OR 4.84; 95% CI: 1.94-12.13) and presence of bone metastases (OR 8.73; 95% CI: 4.37-17.48) or brain metastases (OR 25.63; 95% CI: 1.55-422.86) were significantly associated with lung metastases. Younger age and surgical treatment (hazard ratio, HR 0.46; 95% CI: 0.30-0.71) favored survival. Median survival was prolonged through primary tumor surgery. CONCLUSIONS: The factors revealed here may guide lung metastasis screening and prophylactic treatment for osteosarcoma patients. A primary tumor in an axial location, greater primary tumor size, higher lymph node stage and presence of bone or brain metastases were significantly correlated with lung metastases. The elderly group (≥ 60 years) showed significant correlation with poor overall survival. For improved survival among high-grade osteosarcoma patients with lung metastases, aggressive surgery on the primary tumor site should be encouraged.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Young Adult , Osteosarcoma/pathology , Lung Neoplasms/secondary , Prognosis , Osteosarcoma/surgery , Osteosarcoma/diagnosis , Osteosarcoma/mortality , Survival Analysis , China/epidemiology , Prevalence , Risk Factors , Cohort Studies , Lung Neoplasms/surgery , Lung Neoplasms/diagnosis , Lung Neoplasms/mortality
4.
Rev. Col. Bras. Cir ; 46(2): e2094, 2019. tab, graf
Article in Portuguese | LILACS | ID: biblio-1003087

ABSTRACT

RESUMO Objetivo: determinar a expressão de neurotrofinas e seus receptores tirosina quinases em pacientes com osteossarcoma (OS) e sua correlação com desfechos clínicos. Métodos: biópsias de tumores primários de pacientes com OS tratados em uma única instituição, consecutivamente, entre 2002 e 2015, foram analisados através de imuno-histoquímica para expressão de receptores de tirosina quinase A e B (TrKA e TrKB), fator de crescimento neural (NGF) e fator neurotrófico derivado do cérebro (BDNF). De forma independente, dois patologistas classificaram os marcadores de imuno-histoquímica como negativos (negativos e focais fracos) ou positivos (moderado focal/difuso ou forte focal/difuso). Resultados: foram analisados dados de 19 pacientes (10 do sexo feminino e 9 do masculino) com mediana de idade de 12 anos (5 a 17,3 anos). Dos tumores, 83,3% estavam localizados em membros inferiores e 63,2% dos pacientes eram metastáticos ao diagnóstico. A sobrevida global em cinco anos foi de 55,3%. BDNF foi positivo em 16 pacientes (84%) e NGF em 14 pacientes (73%). TrKA e TrKB apresentaram coloração positiva em quatro (21,1%) e oito (42,1%) pacientes, respectivamente. A análise de sobrevida não demonstrou diferença significativa entre receptores TrK e neurotrofinas. Conclusão: amostras de OS primário expressam neurotrofinas e receptores TrK através de imuno-histoquímica. Estudos futuros podem auxiliar na identificação do papel das mesmas na patogênese do OS e determinar se há possível correlação prognóstica.


ABSTRACT Objective: to determine the expression of neurotrophins and their tyrosine-kinase receptors in patients with osteosarcoma (OS) and their correlation with clinical outcomes. Methods: we applied immunohistochemistry to biopsy specimens of patients consecutively treated for primary OS at a single institution between 2002 and 2015, analyzing them for expression receptors of tyrosine kinase A and B (TrKA and TrKB), neural growth factor (NGF) and brain derived neurotrophic factor (BDNF). Independently, two pathologists classified the immunohistochemical markers as negative (negative or weak focal) or positive (moderate focal/diffuse or strong focal/diffuse). Results: we analyzed data from 19 patients (10 females and 9 males), with median age of 12 years (5 to 17.3). Tumors' location were 83.3% in the lower limbs, and 63.2% of patients had metastases at diagnosis. Five-year overall survival was 55.3%. BDNF was positive in 16 patients (84%) and NGF in 14 (73%). TrKA and TrKB presented positive staining in four (21,1%) and eight (42,1%) patients, respectively. Survival analysis showed no significant difference between TrK receptors and neurotrophins. Conclusion: primary OS samples express neurotrophins and TrK receptors by immunohistochemistry. Future studies should explore their role in OS pathogenesis and determine their prognostic significance in larger cohorts.


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Bone Neoplasms/pathology , Osteosarcoma/pathology , Brain-Derived Neurotrophic Factor/analysis , Receptor, trkA/analysis , Receptor, trkB/analysis , Nerve Growth Factors/analysis , Reference Values , Bone Neoplasms/mortality , Immunohistochemistry , Biomarkers, Tumor , Osteosarcoma/mortality , Risk Factors , Statistics, Nonparametric , Kaplan-Meier Estimate
5.
Clinics ; 74: e701, 2019. tab, graf
Article in English | LILACS | ID: biblio-1001831

ABSTRACT

OBJECTIVES: Osteosarcoma of the jaw (OSAJ) is fundamentally different in clinical practice from its peripheral counterparts. Studies are difficult to conduct due to low incidence rates. The primary aim of this study was to provide for the first time a comprehensive retrospective analysis of the treatment concepts and outcome data of OSAJ patients treated at the University Hospital Vienna and to compare these with two recently published studies on OSAJ. The clinical study was accompanied by a biomarker study investigating the prognostic relevance of melanoma-associated antigen-A (MAGE-A) in OSAJ specimens. METHOD: Eighteen patients were included, and their outcomes were compared to published data. Immunohistochemistry was performed with mouse monoclonal antibodies against MAGE-A. Survival rates were estimated by the Kaplan-Meyer method. The log-rank test was used to analyze potential prognostic parameters. Fisher's exact test was performed to define the significant differences between the survival rates of the current study and the DOESAK registry. RESULTS: Disease-specific survival was 93.8% after five and 56.3% after ten years. The development of metastases (p=0.033) or relapse (p=0.037) was associated with worsened outcomes in our group as well as in the comparative group. Despite the different treatment concepts of the study groups, survival rates were comparable. MAGE-A failed to show prognostic relevance for OSAJ patients. CONCLUSIONS: Uncertainties about the optimal treatment strategies of OSAJ patients will currently remain. Thus, prospective studies of OSAJ are needed but are only feasible in a multicenter study setting, conducted over a prolonged time period.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Aged, 80 and over , Bone Neoplasms/therapy , Osteosarcoma/therapy , Prognosis , Austria/epidemiology , Bone Neoplasms/mortality , Bone Neoplasms/pathology , Immunohistochemistry , Biomarkers/analysis , Osteosarcoma/mortality , Osteosarcoma/pathology , Survival Rate , Retrospective Studies , Antibodies, Monoclonal/analysis , Antigens, Neoplasm/analysis
6.
Rev. Col. Bras. Cir ; 45(3): e1129, 2018. tab
Article in Portuguese | LILACS | ID: biblio-956556

ABSTRACT

RESUMO Objetivo: determinar, em pacientes pediátricos portadores de neoplasias malignas, as características de nódulos pulmonares identificados à tomografia computadorizada, capazes de diferenciar nódulos benignos de metástases. Métodos: estudo retrospectivo de pacientes submetidos a ressecções pulmonares de nódulos diagnosticados como metástases em um período de sete anos. Achados de tomografia e da cirurgia, assim como resultados dos exames anatomopatológicos foram comparados. Resultados: nove pacientes, submetidos a 11 intervenções cirúrgicas, foram estudados. Entre as variáveis estudadas, apenas o tamanho do nódulo, maior do que 12,5mm provou ser estatisticamente significante para predizer malignidade. Conclusão: esse estudo sugere que, entre as características tomográficas de nódulos pulmonares de crianças portadoras de neoplasias malignas, apenas o tamanho da lesão foi preditor de malignidade.


ABSTRACT Objective: to determine, in pediatric patients with malignant neoplasms, the characteristics of pulmonary nodules identified on computed tomography, as well as the possibility of differentiating benign lesions from metastases. Methods: we conducted a retrospective study of patients submitted to pulmonary resections of nodules diagnosed as metastases in a period of seven years. We compared computed tomography and surgery findings, as well as results of anatomopathological examinations. Results: we studied nine patients submitted to 11 surgical interventions. Among the studied variables, only nodule size greater than 12.5mm proved to be statistically significant to predict malignancy. Conclusion: among the tomographic characteristics of pulmonary nodules in children with malignant neoplasms, only the size of the lesion was a predictor of malignancy.


Subject(s)
Humans , Child, Preschool , Child , Unnecessary Procedures , Lung Neoplasms/surgery , Lung Neoplasms/secondary , Teratoma/pathology , Thoracoscopy/methods , Bone Neoplasms/pathology , Tomography, X-Ray Computed , Osteosarcoma/pathology , Retrospective Studies , Sensitivity and Specificity , Hepatoblastoma/pathology , Wilms Tumor/pathology , Kidney Neoplasms/pathology , Liver Neoplasms/pathology , Lung Neoplasms/diagnostic imaging
7.
Rev. méd. Chile ; 145(8): 1076-1082, ago. 2017. tab, graf
Article in Spanish | LILACS | ID: biblio-902588

ABSTRACT

Phyllodes tumors account for less than 1% of tumors of the mammary gland, have both epithelial and stromal components and are classified as benign, borderline and malignant. The malignant tumors are highly heterogeneous: they can differentiate to liposarcomas, fibrosarcomas, rhabdomyosarcomas, chondrosarcomas or osteosarcomas. The differentiation to osteosarcoma is extremely rare, constitutes 1.3% of cases and is very aggressive. The standard treatment of these tumors is surgical. The role of radiotherapy and chemotherapy is not clear. However, in patients in whom wide surgical margins are not achieved, adjuvant radiotherapy can be of help. We report a 63 years old female with a right breast osteosarcoma with an osteoclastic component, originating in a phyllodes tumor. The tumor was excised surgically and afterwards she was treated with 10 sessions of 50 Gy of radiotherapy in 25 fractions. She has remained free of disease for the last 10 months.


Subject(s)
Humans , Female , Middle Aged , Breast Neoplasms/pathology , Osteosarcoma/pathology , Phyllodes Tumor/pathology , Neoplasms, Multiple Primary/pathology , Biopsy , Breast Neoplasms/surgery , Breast Neoplasms/radiotherapy , Immunohistochemistry , Osteosarcoma/surgery , Osteosarcoma/radiotherapy , Treatment Outcome , Phyllodes Tumor/surgery , Phyllodes Tumor/radiotherapy , Neoplasms, Multiple Primary/surgery , Neoplasms, Multiple Primary/radiotherapy
8.
J. appl. oral sci ; 25(4): 455-461, July-Aug. 2017. graf
Article in English | LILACS, BBO | ID: biblio-893645

ABSTRACT

Abstract Lesions of non-endodontic origin may mimic periapical abscess. Osteosarcoma is a rare malignant lesion. Case report The present report describes a case of chondroblastic osteosarcoma in the periapical region of teeth #29, #30, and #31 of an 18-year-old male. Clinical history showed self-reported discomfort in the right posterior gingiva for over a month. Physical examination showed a small expansion and redness of the right mandibular buccal and lingual cortical plates, but no signs of pain or inflammation were observed. All the teeth responded positively to pulp sensibility. Periapical and panoramic radiographs showed slight periapical radiolucency in the roots of teeth #29 and #30, clear periodontal ligament space widening, and evident loss of lamina dura. Incisional biopsy was performed, and based on microscopic findings the diagnosis of chondroblastic osteosarcoma was confirmed. Conclusions Non-endodontic diseases associated with tooth root apex, such as chondroblastic osteosarcoma, should be included in differential diagnosis of jaw lesions that resemble periapical abscess.


Subject(s)
Humans , Male , Adolescent , Periapical Abscess/pathology , Mandibular Neoplasms/pathology , Osteosarcoma/pathology , Chondrocytes/pathology , Periapical Abscess/diagnostic imaging , Biopsy , Immunohistochemistry , Radiography, Panoramic , Mandibular Neoplasms/diagnostic imaging , Osteosarcoma/diagnostic imaging , Diagnosis, Differential , Cone-Beam Computed Tomography
9.
Bol. méd. Hosp. Infant. Méx ; 74(1): 60-64, ene.-feb. 2017. graf
Article in Spanish | LILACS | ID: biblio-888597

ABSTRACT

Resumen: Introducción: El osteosarcoma es uno de los tipos de cáncer más común en la etapa escolar y en la adolescencia, y es el más común de los tumores óseos malignos en este grupo de edad. Frecuentemente, el osteosarcoma es hallado en los huesos largos de las extremidades. Existen muy pocos casos descritos en menores de 5 años. Hasta donde se sabe, no hay ningún caso reportado en lactantes. La variedad telangiectásica es poco común y no existen casos reportados antes de la edad preescolar. Caso clínico: Se presenta el caso clínico de una paciente lactante de 10 meses de edad que presentó un tumor lítico en la novena costilla derecha, que posterior a la resección fue clasificado como osteosarcoma telangiectásico. Conclusiones: El osteosarcoma telangiectásico en la edad pediátrica es poco común. A la fecha, la paciente ha presentado buena respuesta al tratamiento, aunque se desconoce el pronóstico y la supervivencia de este padecimiento.


Abstract: Background: Osteosarcoma is one of the most common types of cancer in childhood and adolescence and it is the most common malignant bone tumor in this group of age. Osteosarcoma is frequently found in long bones of the extremities. There are very few cases described in children under 5 years of age, and according to this review, none in infants. The telangiectatic variant is uncommon, and there are no reported cases before preschool age. Case report: A 10-month-old female infant with a lithic tumor of the ninth right rib, which was classified after resection as a telangiectatic osteosarcoma, is presented. Conclusions: Telangiectatic osteosarcoma in the pediatric age is very uncommon. To date, the patient has presented good response to treatment, although the prognosis and survival of this condition is unknown.


Subject(s)
Female , Humans , Infant , Telangiectasis/diagnosis , Bone Neoplasms/diagnosis , Osteosarcoma/diagnosis , Prognosis , Ribs/pathology , Telangiectasis/pathology , Bone Neoplasms/surgery , Bone Neoplasms/pathology , Osteosarcoma/surgery , Osteosarcoma/pathology
10.
Biol. Res ; 50: 15, 2017. graf
Article in English | LILACS | ID: biblio-838968

ABSTRACT

BACKGROUND: Ubiquitin specific peptidase 39 (USP39), an essential factor in the assembly of the mature spliceosome complex, has an aberrant expression in several cancer. However, its function and the corresponding mechanism on human osteosarcoma has not been fully explored yet. METHODS: The mRNA and DNA copies of USP39 were increased in osteosarcoma cancer tissues compared with the one in human normal tissues according to datasets from the publicly available Oncomine database. A further western blot analysis also demonstrated an aberrant endogenous expression of USP39 in three different osteosarcoma cells. Then lentivirus-mediated short hairpin RNA (shRNA) was designed to silence USP39 in human osteosarcoma cell line U2OS, which is used to test the impact of USP39-silencing on cellular proliferation, colony formation, cell cycle distribution and apoptosis. RESULTS: Knockdown of USP39 expression in U2OS cell significantly decreased cell proliferation, impaired colony formation ability. A further analysis indicated suppression of USP39 arrested cell cycle progression at G2/M phase via p21 dependent way. In addition, the results of Annexin V/7-AAD staining suggested the knockdown of USP39 could promote U2OS cell apoptosis through PARP cleavage. CONCLUSIONS: These results uncover the critical role of USP39 in regulating cancer cell mitosis and indicate USP39 is critical for osteosarcoma tumorigenesis.


Subject(s)
Humans , Osteosarcoma/enzymology , Osteosarcoma/pathology , Apoptosis , Gene Knockdown Techniques/methods , Ubiquitin-Specific Proteases/metabolism , Tumor Stem Cell Assay , Gene Expression Regulation, Neoplastic , Lentivirus , Cell Line, Tumor , Cell Proliferation , Ubiquitin-Specific Proteases/genetics , Flow Cytometry , Genetic Vectors
11.
Medicina (B.Aires) ; 75(5): 303-306, Oct. 2015. graf, tab
Article in Spanish | LILACS | ID: biblio-841517

ABSTRACT

El objetivo de este estudio fue analizar una serie de pacientes con osteosarcoma parostal de bajo grado y los resultados de su tratamiento quirúrgico y reconstrucción con un trasplante óseo. Se realizó una búsqueda retrospectiva en nuestra base de datos oncológica entre 1980 y 2010 de todos los pacientes con diagnóstico de osteosarcoma parostal. Se incluyeron para el análisis únicamente los osteosarcomas parostales de bajo grado, tratados quirúrgicamente con cirugía de conservación de miembro y reconstruidos con trasplante óseo cadavérico fresco congelado. Se incluyeron 22 pacientes en el estudio. La edad media de la serie fue de 32 ± 11 años (10-59) y el seguimiento medio de 93 ± 69 meses (8-237). La supervivencia global de los pacientes analizados fue de 91% (IC95%: 79-100) a 10 años. Cuatro pacientes (18%) presentaron una recidiva local de la enfermedad, dos de éstas fueron clasificadas histológicamente como osteosarcoma parostal desdiferenciado. Dos pacientes desarrollaron enfermedad a distancia, siendo el pulmón el único sitio de localización. La tasa de supervivencia de las reconstrucciones de la cirugía de conservación de miembro a 10 años fue de 65% (IC95%: 44-86). La supervivencia a largo plazo de los pacientes con osteosarcoma parostal de bajo grado es superior al 90%. La resección quirúrgica con márgenes amplios debe ser el tratamiento de elección y la reconstrucción biológica es una alternativa válida.


The objective of the study was to analyze a group of patients with low grade parosteal osteosarcoma treated with limb salvage surgery and reconstructed with bone allograft. A retrospective review from our oncologic data base between 1980 and 2010 was done and all patients with diagnosis of low grade parosteal osteosarcoma, treated with limb salvage surgery and reconstructed with allograft were included. Twenty-two patients were included for the analysis. The mean age was 32 ± 11 years (10-59) y the mean follow-up 93 ± 69 months (8-237). Ten year overall survival of the series was 91% (95%CI: 79-100). Four patients developed local recurrence, 2 of them histological classified after the resection dedifferentiated parosteal osteosarcoma. Two patients developed distant recurrence, being the lung the only site of metastasis. Ten year limb salvage reconstruction survival was 65% (95%CI: 44-86). Long term survival rate in low grade parosteal osteosarcoma is over 90%. Surgical resection wide margin should be the elective treatment and biological limb salvage reconstruction is a good alternative.


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Young Adult , Osteosarcoma/surgery , Bone Transplantation/mortality , Limb Salvage/methods , Lung Neoplasms/secondary , Osteosarcoma/mortality , Osteosarcoma/pathology , Retrospective Studies , Follow-Up Studies , Treatment Outcome , Survivors , Rare Diseases/surgery , Rare Diseases/mortality , Rare Diseases/pathology , Kaplan-Meier Estimate , Neoplasm Grading
12.
Article in English | WPRIM | ID: wpr-22484

ABSTRACT

Malignant kidney neoplasms are the most frequently encountered solid kidney masses. Although renal cell carcinoma is the major renal malignancy, other solid malignant renal masses should be considered in the differential diagnosis of solid renal masses that do not contain a macroscopic fatty component. In this pictorial essay, we present the imaging findings of a primitive neuroectodermal tumor, primary liposarcoma of the kidney, primary neuroendocrine tumor, leiomyosarcoma, synovial sarcoma, malignant fibrous histiocytoma, sclerosing fibrosarcoma and renal metastasis of osteosarcoma.


Subject(s)
Bone Neoplasms/secondary , Carcinoma, Renal Cell/pathology , Diagnosis, Differential , Fibrosarcoma/diagnostic imaging , Histiocytoma/diagnostic imaging , Humans , Kidney Neoplasms/pathology , Leiomyosarcoma/pathology , Magnetic Resonance Imaging , Middle Aged , Neuroectodermal Tumors, Primitive/pathology , Osteosarcoma/pathology , Sarcoma , Sarcoma, Synovial/diagnostic imaging , Tomography, X-Ray Computed
13.
Indian J Biochem Biophys ; 2013 Dec; 50(6): 485-491
Article in English | IMSEAR | ID: sea-150261

ABSTRACT

Triptolide, a diterpene derived from Tripterygium wilfordii Hook f., a Chinese medicinal herb, has been reported to inhibit cell proliferation and induce apoptosis in various human cancer cells, but its anticancer effects on human osteosarcoma cells have not yet been elucidated. In this study, we investigated whether triptolide induces apoptosis in human osteosarcoma cells and the underlying molecular mechanisms. We firstly demonstrated that triptolide inhibited cell growth and induced apoptosis in U2OS cells. Western blot analysis showed that the levels of procaspase-8, -9, Bcl-2, Bid and mitochondrial cytochrome c were downregulated in triptolide-treated U2OS cells, whereas the levels of Fas, FasL, Bax, cytosolic cytochrome c, cleaved caspase-3 and cleaved PARP were upregulated. These results suggest that triptolide induces apoptosis in U2OS cells by activating both death receptor and mitochondrial apoptotic pathways.


Subject(s)
Antineoplastic Agents/pharmacology , Apoptosis/drug effects , Caspase 3/metabolism , Cell Line, Tumor , Cell Proliferation/drug effects , Diterpenes/pharmacology , Enzyme Activation/drug effects , Epoxy Compounds/pharmacology , G2 Phase Cell Cycle Checkpoints/drug effects , Humans , M Phase Cell Cycle Checkpoints/drug effects , Mitochondria/drug effects , Mitochondria/metabolism , Osteosarcoma/pathology , Phenanthrenes/pharmacology , Poly(ADP-ribose) Polymerases/metabolism , Proteolysis/drug effects
14.
Indian J Exp Biol ; 2013 Oct; 51(10): 789-796
Article in English | IMSEAR | ID: sea-149383

ABSTRACT

The aims of this study are the investigation of the effects of fibronectin and type IV collagen extracellular matrix proteins and the role of caspase-3 and -9 on cis-platin induced U2-OS apoptosis were studied. First the cytotoxic effects of cis-platin on cell system were investigated by colorimetric method and than morphological and ELISA analysis were used for determination of cell apoptosis when induced with cis-platin. In addition, after adhering the cells to fibronection or type IV collagen proteins, the apoptotic rate and the effects of caspase-3 and -9 were also investigated by ELISA in presence of specific inhibitors. U2-OS cells showed 20% cytotoxicity after treatment with 2.4 µM of cis-platin for 48 h. Morphological and the numerical data showed that cis-platin was able to induced apoptosis on cells as a dose-dependent manner. Caspase-3 and -9 inhibitors inhibited cis-platin-induced apoptosis in U2-OS cells, respectively. The binding of cells to 10 µg/mL of fibronectin but not type IV collagen enhanced the apoptosis about 2.5 fold that effects inhibited with caspase-3 inhibitor. The caspase-3 and -9 are involved in the apoptotic signals induced by cis-platin in U2-OS. The binding to fibronectin, but not type IV collagen enhanced the apoptotic response of U2-OS and fibronectin-dependent apoptosis was activated by caspase-3. These finding might be useful for patients to fight against osteosarcoma.


Subject(s)
Antineoplastic Agents/pharmacology , Apoptosis/drug effects , Bone Neoplasms/pathology , Cell Line, Tumor , Cisplatin/pharmacology , Collagen Type IV/pharmacology , Dose-Response Relationship, Drug , Drug Evaluation, Preclinical , Fibronectins/pharmacology , Humans , Osteosarcoma/pathology
15.
Journal of the Royal Medical Services. 2013; 20 (3): 13-20
in English | IMEMR | ID: emr-142918

ABSTRACT

Radiology plays a crucial role in diagnosis, work-up and staging of osteosarcoma. The main aim of the study is to review, analyze and characterize the imaging findings of a large series of histologically proven osteosarcomas focusing on the nonconventional subtypes. We retrospectively reviewed the imaging findings of 250 cases with histologically proven primary osteosarcoma. The study was conducted at King Hussein Medical Center and King Hussein Cancer Center, Amman-Jordan during the period 2003-2012. Approval by the ethical committee and institutional review board was taken from both institutions before starting the study. Patient demographic data was recorded. Images from plain radiographs [n=238], angiograms [n=28], bone isotope scans [n=56], computed tomography scans [n=99], computed tomography angiograms [n=27] and magnetic resonance imaging [n=189] were evaluated for the origin site, location, tumor size, matrix pattern, extrinsic and intrinsic characteristics and the soft tissue component of the tumor. The sample included 162 males [65%] and 88 females [35%], with an age range of 12-48 years [mean age of 23.5 years]. Simple descriptive statistical methods [frequency, mean and percentage] were used to describe the study variables. The most common histological diagnoses were conventional [n=193], telangiectatic [n=14], small cell [n=3], low grade central [n=3], high grade surface [n=2], parosteal [n=4], and periosteal [n=5] and non specific [n= 26]. The most frequent origin site in the long bones is the metaphysis [80%] followed by diaphysis [9%], and less frequently the epiphysis [2%], 10% were found in the spine and flat bones. The commonest lesion location was distal femur [25%], proximal femur [18%], proximal humerus [17%], proximal tibia [15%], spine and flat bones [16%], other places [9%]. The tumor size ranged from 2-21cm. The majority of cases [78%] demonstrated osteoid matrix abnormal mineralization, 32 of them showed obvious and marked mineralization, three cases with marked mineralization were noted in the spine, one of them gave an ivory vertebra appearance. A purely lytic pattern was seen in 48%. Soft-tissue components were seen in 58% of cases. This study provides a good relation between the radiological imaging and histological subtypes of osteosarcoma in a relatively large series of osteosarcoma and highlights our experience at King Hussein Medical and Cancer Centers.


Subject(s)
Humans , Male , Female , Magnetic Resonance Imaging , Osteosarcoma/pathology , Review Literature as Topic , Bone Neoplasms/diagnostic imaging , Outcome Assessment, Health Care , Gadolinium DTPA
16.
Rev. venez. cir. ortop. traumatol ; 45(2): 45-50, 2013. ilus
Article in Spanish | LILACS, LIVECS | ID: biblio-1282919

ABSTRACT

El osteosarcoma es un tumor maligno compuesto de células fusiformes, que se caracteriza por la producción de tejido osteoide y hueso, su crecimiento es rápido con extensión locoregional y difusión metastásica a pulmón. Generalmente 20% de los pacientes presentan metástasis en el momento del diagnóstico. Se observa con frecuencia en los huesos largos de los adolescentes y adultos jóvenes con mayor afectación del sexo masculino. El tratamiento de los pacientes con osteosarcomas se basa en la resección amplia y completa o en una amputación del tumor primario, y en la administración de quimioterapia coadyuvante. Presentamos el caso de paciente masculino de 21 años, quien consultó por una tumoración en la rodilla izquierda de rápido crecimiento hasta alcanzar 80 cms de perímetro. La biopsia incisional reportó un condrosarcoma condroblástico. En vista de no tener respuesta al tratamiento coadyuvante, se decidió realizar una desarticulación coxofemoral. Cuando el osteosarcoma es resistente a la quimioterapia y su crecimiento continúa, se deben realizar procedimientos radicales para garantizar la sobrevida del paciente(AU)


Osteosarcoma is a malignant tumor composed of spindle cells, characterized by the production of osteoid tissue and bone is growing rapidly, with locoregional extension and metastatic spread to the lung. Generally 20% of patients have metastases at diagnosis. It most often occurs in the long bones of adolescents and young adults with greater male involvement. Treating osteosarcoma patients is based on wide and complete resection or amputation of the primary tumor and the administration of adjuvant chemotherapy. We present the case of male patient 21, who presented a tumor in his left knee rapidly growing up to 80 cm in circumference. Incisional biopsy chondroblastic reported chondrosarcoma. In view of having no adjuvant treatment response was decided to hip disarticulation. When osteosarcoma is resistant to chemotherapy and growth continues, radical procedures must be performed to ensure the survival of the patient(AU)


Subject(s)
Humans , Male , Adult , Osteosarcoma/surgery , Osteosarcoma/pathology , Drug Therapy , Tumor Necrosis Factors , Histology , Neoplasms
17.
Article in English | WPRIM | ID: wpr-202398

ABSTRACT

BACKGROUND: The relationship between surgical margin and local recurrence (LR) in osteosarcoma patients with poor responses to chemotherapy is unclear. Moreover, the incidences of LR according to three different resection planes (bone, soft tissue, and perineurovascular) are not commonly known. METHODS: We evaluated the incidence of LR in three areas. To assess whether there is a role of surgical margin on LR in patients resistant to preoperative chemotherapy, we designed a case (35 patients with LR) and control (70 patients without LR) study. Controls were matched for age, location, initial tumor volume, and tumor volume change during preoperative chemotherapy. RESULTS: LR occurred at the soft tissues in 18 cases (51.4%), at the perineurovascular tissues in 11 cases (31.4%), and at the bones in six cases (17.2%). The proportion of inadequate perineurovascular margin was higher in the case group than in the control group (p = 0.01). Within case-control group (105 patients), a correlation between each margin status and LR at corresponding area was found in the bone (p < 0.001) and perineurovascular area (p = 0.001). CONCLUSIONS: LR is most common in soft tissues. In patients showing similar unfavorable responses to chemotherapy, the losses of perineurovascular fat plane on preoperative magnetic resonance imaging may be a valuable finding in predicting LR.


Subject(s)
Adolescent , Bone Neoplasms/pathology , Case-Control Studies , Chi-Square Distribution , Female , Humans , Male , Neoplasm Recurrence, Local/pathology , Neoplasm, Residual/pathology , Osteosarcoma/pathology
19.
Article in English | IMSEAR | ID: sea-157420

ABSTRACT

Primary osteosarcoma of the breast is an extremely rare and aggressive tumor representing 12.5% of mammary sarcomas. It is associated with early recurrence and hematogenous rather than lymphatic spread, most commonly to the lungs. We report a case of 55 year old lady with gradually increasing painless lump measuring 7 × 6 cm in upper outer quadrant of left breast of 2 months duration. FNAC smears revealed pleomorphic spindle cells admixed with osteoid and chondroid material. A differential diagnosis of metaplastic carcinoma and malignant phyllodes tumor was offered. Histopathology of the modified radical mastectomy specimen showed predominantly osteosarcomatous areas. Epithelial component was not seen even after extensive sampling of the tumor. On immunohistochemistry, vimentin, S100 and CD68 were positive while AE1/AE3, CAM5.2, ER, PR, Her2-neu and desmin were negative confirming a diagnosis of osteosarcoma. Primary osteosarcoma of breast must be differentiated from metaplastic carcinoma and malignant phyllodes tumor because of different biological behaviour and treatment approach. Immunohistochemistry plays a pivotal role in the diagnosis of this tumor.


Subject(s)
Breast Neoplasms/diagnosis , Breast Neoplasms/pathology , Breast Neoplasms/therapy , Female , Humans , Immunohistochemistry/methods , Middle Aged , /diagnosis , Osteosarcoma/pathology , Osteosarcoma/therapy
20.
Indian J Pathol Microbiol ; 2012 Apr-Jun 55(2): 163-169
Article in English | IMSEAR | ID: sea-142214

ABSTRACT

Background : Fatty acid synthase (FASN) is overexpressed in a variety of human cancers, and may be involved in cancer metastasis. Hence, the strategies targeted on FASN may have therapeutic potential for treating cancer metastasis. Objectives : The aim of this study is to investigate the correlation of FASN expression with metastasis in human osteosarcoma. Materials and Methods : Human osteosarcoma cell lines U2-OS and osteosarcoma biopsy specimens were employed in this study. The expression of FASN protein in osteosarcoma specimens was detected by IHC (immunohistochemistry) and the relationship with metastasis was analyzed. We performed the cerulenin, an inhibitor of FASN, to inhibit FASN expression in U2-OS cells. Western blot and RT-PCR were performed to investigate the expression of FASN in U2-OS cells. Cells mobility was detected by wound healing and Transwell assays. Results : Results showed that the FASN expression level in the cases with pulmonary metastases was significantly higher than in those without metastasis. In vitro, the invasion and migration of U2-OS cells were suppressed by inhibiting FASN. Our findings suggested that FASN may be involved in osteosarcoma metastasis


Subject(s)
Adolescent , Antineoplastic Agents/pharmacology , Blotting, Western , Cell Movement/drug effects , Cell Proliferation/drug effects , Cells, Cultured , Cerulenin/pharmacology , Child , Child, Preschool , Enzyme Inhibitors/pharmacology , Fatty Acid Synthase, Type I/antagonists & inhibitors , Female , Gene Expression Profiling , Humans , Immunohistochemistry , Male , Osteosarcoma/pathology , Osteosarcoma/secondary , Real-Time Polymerase Chain Reaction
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