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1.
J Pers Med ; 14(4)2024 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-38673030

RESUMO

BACKGROUND: The ability of the survival nomogram developed in the EACH study and albumin-bilirubin (ALBI) grade to predict the survival of advanced hepatocellular carcinoma (HCC) patients receiving oxaliplatin plus 5-fluorouracil/leucovorin (FOLFOX4) remains unvalidated. Here, we comprehensively evaluated these prognostic tools. METHODS: The survival nomogram and ALBI grade of each patient were assessed, and the area under the receiver operating curve (AUROC) and Harrell's C-index for the risk classification model were calculated. RESULTS: Overall, 76 HCC patients who received FOLFOX4 between August 2017 and June 2023 were included. The survival nomogram classified patients into low-, intermediate-, and high-risk groups, with a median overall survival (OS) of 9.82, 10.64, and 3.70 months, respectively (p = 0.23). The AUROC was 0.621 and Harrell's C-index was 0.589. However, the ALBI grade categorized all patients into grade 1, 2, and 3, with a median OS of 9.82, 6.83, and 1.58 months, respectively (p = 0.00024). The AUROC was 0.663 and Harrell's C-index was 0.663. CONCLUSION: The ALBI grade can be a potential prognostic tool. However, the survival nomogram does not provide clear discrimination. Therefore, FOLFOX4 should be an option for patients with ALBI grade 1 who cannot receive immunotherapy or targeted therapy. Additional prospective studies with a larger cohort are warranted to validate the survival nomogram and ALBI grade as prognostic tools.

2.
J Clin Med ; 13(6)2024 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-38541960

RESUMO

Background: Although cisplatin plus 5-fluorouracil (5-FU) is the standard first-line treatment for advanced-stage esophageal squamous cell carcinoma (ESCC), carboplatin was substituted for cisplatin in cisplatin-ineligible patients. The efficacy of carboplatin plus 5-FU for advanced-stage ESCC remains unreported. Methods: This retrospective study analyzed first-line treatment-carboplatin plus 5-FU, cisplatin plus 5-FU, or best supportive care (BSC)-in advanced-stage ESCC patients at a tertiary hospital in Thailand (2012-2022). Survival was assessed using the Kaplan-Meier method, compared via the log-rank test, and adjusted through propensity score matching. Significance was set at p < 0.05. Results: Of 256 patients, 39.9% received carboplatin plus 5-FU, 27.7% cisplatin plus 5-FU, and 32.4% BSC. Carboplatin was significantly associated with older age, poorer performance status, more comorbidities, chronic kidney disease, and lower creatinine clearance. Median overall survival (OS) for carboplatin plus 5-FU, cisplatin plus 5-FU, and BSC was 8.05 (HR 0.31 [0.23, 0.43] vs. BSC, p < 0.001; HR 1.06 [0.78, 1.44] vs. cisplatin plus 5-FU, p = 0.7), 8.43, and 3.64 months, respectively. No significant OS difference was observed between carboplatin and cisplatin treatments after propensity score matching. Median progression-free survival (PFS) and objective response rates (ORR) showed no significant difference between carboplatin and cisplatin treatments. Conclusions: Despite less favorable baseline characteristics of patients receiving carboplatin plus 5-FU, this combination exhibited comparable OS, PFS, and ORR to cisplatin plus 5-FU in real-world scenarios. Furthermore, it significantly improved OS over BSC. Consequently, carboplatin plus 5-FU should be considered as an alternative regimen, particularly for advanced-stage ESCC patients who are ineligible for cisplatin.

3.
BMC Cancer ; 24(1): 281, 2024 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-38429725

RESUMO

BACKGROUND: No widely used prognostic tool exists to demonstrate the benefit of oxaliplatin plus 5-fluorouracil/leucovorin (FOLFOX4) in patients with advanced hepatocellular carcinoma (HCC). We aimed to establish a prognostic score and demonstrate the real-world efficacy of FOLFOX4 chemotherapy in Thai patients. METHODS: Between August 2017 and December 2021, we identified 58 FOLFOX4-treated patients with HCC. Overall survival (OS), progression-free survival (PFS), and objective response rate (ORR) were assessed. The prognostic score was constructed by stepwise Cox proportional hazards regression analysis to select variables for the best model with the lowest Akaike information criterion from all potential variables. RESULTS: Forty-four patients (76%) received FOLFOX4 as first-line therapy. The ORR in the entire cohort was 8.6%, and the disease control rate was 29.3%. The PFS and OS were 3.7 and 4.8 months, respectively. Four clinically relevant variables were included in the new prognostic score to predict 6-month OS: L, the presence of lung metastasis; A, alcoholic cirrhosis; B, elevated total bilirubin level; and S, sorafenib-naïve status. Using the LABS score, patients were classified into low-, intermediate-, and high-risk groups, demonstrating OS values of 9.3, 4.2, and 2.1 months, respectively (p < 0.0001). The C-index and area under the receiver-operating characteristic curve of the score were 0.71 and 0.73, respectively. CONCLUSIONS: The proposed LABS score could discriminate patients who would derive benefit from FOLFOX4 chemotherapy. FOLFOX4 chemotherapy is an option for patients who cannot receive immunotherapy and targeted therapy, particularly those with a low-risk score. However, further validation of this model via larger cohorts is warranted.


Assuntos
Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Prognóstico , Estudos Retrospectivos , Neoplasias Hepáticas/patologia , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Fluoruracila , Leucovorina , Resultado do Tratamento
4.
Int J Urol ; 31(2): 144-153, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37846171

RESUMO

OBJECTIVE: This study investigated disease-free survival and oncological outcomes in penile cancer patients treated surgically at a high-volume center and identified the prognostic factors for disease-free survival. METHODS: A retrospective analysis was conducted on primary penile cancer patients diagnosed and treated at Songklanagarind Hospital, Thailand, between January 2001 and December 2021. Disease-free survival (DFS) was assessed using Kaplan-Meier survival curves, and Cox proportional hazard models were used for multivariate analysis. RESULTS: The study included 188 patients with primary penile cancer. The majority (98.4%) were uncircumcised. Tumor staging revealed 40.6% with T1 tumors, 72.9% with well-differentiated tumors, and 23.5% diagnosed at stage IIIA. The recurrence rate was 19.1%, with a mean time to recurrence of 25.9 months. Disease-free survival rates at 1, 3, and 5 years were 81.1%, 70.9%, and 70.9%, respectively. Median overall survival was 16.43 months, with survival rates at 1, 3, and 5 years at 67.7%, 42.7%, and 35.4%, respectively. Cox proportional hazard models showed significant associations between disease-free survival and a higher T stage, a high level of CRP (>15 mg/L), delayed onset of symptoms, primary lesion location, groin node metastasis, lymphovascular invasion, and pelvic lymph node metastases. However, multivariate analysis revealed that a higher primary tumor stage (T) was the only independent prognostic factor for disease-free survival. CONCLUSION: This study presents one of the largest cohorts investigating disease-free survival outcomes in penile cancer treatment at a single institution over a prolonged period. A higher pathologic T stage is a significant prognostic factor for disease-free survival. Further large-scale prospective studies are needed for validation.


Assuntos
Neoplasias Penianas , Masculino , Humanos , Intervalo Livre de Doença , Estudos Retrospectivos , Neoplasias Penianas/cirurgia , Neoplasias Penianas/patologia , Taxa de Sobrevida , Estadiamento de Neoplasias , Hospitais , Prognóstico
5.
J Int Med Res ; 51(8): 3000605231193583, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37592923

RESUMO

OBJECTIVE: Combination fluoropyrimidine-based chemotherapy is the standard first-line treatment for metastatic colorectal cancer (CRC). We performed a propensity score (PS)-based analysis to report our real-world experience with long-term follow-up of this regimen for metastatic CRC. METHODS: In this retrospective study, 170 patients with newly diagnosed metastatic CRC treated with first-line combination chemotherapy between January 2003 and March 2021 were identified. Cox proportional hazards regression analysis and PS-based approaches with the logistic regression model were adopted, and the results were compared. RESULTS: The hazard ratio for overall survival (OS) in the oxaliplatin- and irinotecan-based groups was 0.79 (95% confidence interval = 0.56-1.11), and the median OS times in these groups were 16.8 and 13.0 months, respectively. The median time to progression (TTP) for these regimens were 9.0 and 8.9 months, respectively. The objective response rates for the oxaliplatin- and irinotecan-based groups were 42.7% and 34.6%, respectively. OS and TTP did not differ between these regimens in all PS matching models. CONCLUSIONS: First-line treatment using fluoropyrimidine-based chemotherapy regimens in combination with oxaliplatin or irinotecan in patients with metastatic CRC provided comparable efficacy and tolerable toxicity profiles in a real-world setting with long-term follow-up.


Assuntos
Neoplasias do Colo , Neoplasias Retais , Humanos , Irinotecano/uso terapêutico , Oxaliplatina/uso terapêutico , Pontuação de Propensão , Estudos Retrospectivos , Tailândia , Quimioterapia Combinada
6.
Sci Rep ; 12(1): 18439, 2022 11 02.
Artigo em Inglês | MEDLINE | ID: mdl-36323738

RESUMO

Changes in gene expression profiling of peripheral blood mononuclear cells (PBMC) appear to represent the host's response to the cancer cells via paracrine signaling. We speculated that protein expression on circulating T-lymphocytes represent T-lymphocyte trafficking before infiltration into the tumor microenvironment. The possibility of using protein expression on circulating T-lymphocytes as a biomarker to discriminate early-stage non-small cell lung cancer (NSCLC) was explored. Four independent PBMC gene expression microarray datasets (GSE12771, GSE13255, GSE20189 and GSE3934) were analyzed. We selected C5AR1, CLEC4A and NLRP3 based on their significant protein expression in tumor-infiltrating lymphocytes, but not in normal lymphoid tissue. A validation study using automated flow cytometry was conducted in 141 study participants including 76 treatment-naive early-stage non-small cell lung cancer patients (NSCLC), 12 individuals with non-malignant pulmonary diseases, and 53 healthy individuals. Median ratios of C5AR1, CLEC4A and NLRP3 specific antibody staining to CD3 positive cells in early-stage NSCLC patients compared to healthy controls were 0.014 [0-0.37] vs. 0.01 [0-0.07, p = 0.13], 0.03 [0-0.87] vs. 0.02 [0-0.13, p = 0.10] and 0.19 [0-0.60] vs. 0.09 [0.02-0.31, p < 0.0001], respectively. Median fluorescence intensity (MFI) of CD3+C5AR1+, CD3+CLEC4A+ and CD3+NLRP3+ expression in early-stage NSCLC patients compared to healthy volunteers was 185 [64.2-4801] vs. 107.5 [27-229, p < 0.0001], 91.2 [42.4-2355] vs. 71.25 [46.2-103, p = 0.0005], and 1585 [478-5224] vs. 758.5 [318-1976, p < 0.0001], respectively. NLRP3:CD3 ratio, CD3+C5AR1+, CD3+CLEC4A+ and CD3+NLRP3+ MFI were significantly higher in early-stage NSCLC than healthy volunteers with an area under the ROC curve of 0.69-0.76. The CD3+NLRP3+ MFI provided the most distinguishable expression at 71.5% sensitivity and 70% specificity. Furthermore, CD3+NLRP3+ MFI potentially discriminated between early-stage NSCLC from malignant-mimic inflammation and infection pulmonary disease. Further validation in various pulmonary inflammatory disease might be warranted. Our proof-of-principle findings strengthen the hypothesis that malignancies generate distinctive protein expression fingerprints on circulating T-lymphocytes.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Carcinoma de Pequenas Células do Pulmão , Humanos , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Lectinas Tipo C/genética , Lectinas Tipo C/metabolismo , Neoplasias Pulmonares/metabolismo , Linfócitos do Interstício Tumoral/patologia , Glicoproteínas de Membrana/metabolismo , Proteína 3 que Contém Domínio de Pirina da Família NLR/genética , Proteína 3 que Contém Domínio de Pirina da Família NLR/metabolismo , Receptores Imunológicos/metabolismo , Carcinoma de Pequenas Células do Pulmão/metabolismo , Microambiente Tumoral/genética
7.
Int J Palliat Nurs ; 28(9): 436-444, 2022 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-36151980

RESUMO

BACKGROUND: Pain is one of the most frequent symptoms in cancer patients and has a negative impact on their physical, emotional and functional status, as well as their quality of life (QOL). This study evaluated the effectiveness of a pain management programme on pain control and QOL among patients with metastatic cancer receiving systemic chemotherapy. The authors investigated whether a pain management programme contributes to a better pain control and improvement in QOL in the outpatient setting. METHODS: The authors conducted a randomised, single-blinded, controlled, single-centre study of metastatic cancer patients experiencing cancer pain and requiring opioid therapy. Patients were enrolled from the Medical Oncology Outpatient Clinic, Songklanagarind Hospital, Prince of Songkla University, Thailand. Participants were randomly assigned to two strategies: pain assessment and management based on the programme developed by the researchers ('pain management programme' arm), and pain management by individual medical oncologists per the routine procedure ('standard of care' arm). Demographics questionnaires, a pain intensity assessment using the Numeric Rating Scale (NRS) and the Functional Assessment of Cancer Therapy-General (FACT-G, version 4) were used to assess the QOL and cancer pain severity at baseline and at two follow-up visits. RESULTS: Between November 2016 and July 2017, 64 consecutive patients were randomly assigned to the two treatment groups. Most were male (79.7%), with a mean age of 55.1 (±13.8) years. The majority of patients (23; 35.9%) had squamous cell carcinoma of the head and neck, with other prevalent types being lung cancer (9.4%), esophageal cancer (9.4%) and colorectal cancer (9.4%). The most frequent metastatic sites were the lungs (28.1%), liver (26.6%), and bone (20.3%). FINDINGS: Compared with standard care, pain intensity was significantly lower among the patients receiving the pain management programme: 4.0 ±2.2 versus 5.1 ±1.8 (P = 0.033) and 3.3 ±1.7 versus 4.7 ±2.1 (P = 0.025) at visit 1 and 2, respectively. Likewise, QOL measures scored higher in the pain management programme group: 71.2 ±15.4 versus 58.6 ±14.5 (P = 0.002) and 71.8 ±15.5 versus 55.4 ±16.3 (P = 0.002) at visit 1 and 2, respectively. Furthermore, there was a statistically significant positive correlation between pain control and QOL improvement (P = 0.011). CONCLUSION: The investigated pain management programme significantly improved both pain control and QOL in metastatic cancer patients receiving systemic chemotherapy in the outpatient setting.


Assuntos
Dor do Câncer , Neoplasias Pulmonares , Analgésicos Opioides/uso terapêutico , Dor do Câncer/terapia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dor/etiologia , Manejo da Dor , Qualidade de Vida
8.
Case Rep Oncol ; 15(1): 191-198, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35431867

RESUMO

Testicular neuroendocrine tumor associated with teratoma is a rare disease. Very few cases have been reported in the literature, particularly cases involving visceral metastasis. Teratoma with somatic malignant transformation (SMT) is associated with a worse prognosis compared to teratoma without SMT. Previous data have suggested that chemotherapy regimens should be directed toward the transformed histology; however, those suggestions were based on patients with rhabdomyosarcoma, adenocarcinoma, and primitive neuroectodermal subtypes. To the best of our knowledge, only 2 cases with visceral metastasis have been reported, and a better outcome with the bleomycin/etoposide/cisplatin regimen, which responds strongly to germ cell tumors, has been reported in these cases. In contrast, 2 others with lymph node metastasis did not respond to these regimens. Here, we report a case of a patient with testicular neuroendocrine carcinoma associated with teratoma who achieved a good response to chemotherapy.

9.
Front Oncol ; 11: 572740, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33996532

RESUMO

INTRODUCTION: The mainstay systemic treatment for non-oncogenic addictive advanced stage non-small cell lung cancer is chemotherapy. Anti-angiogenic agents are additive compounds that enhance disease control and lead to improvement of overall survival benefit. Recently PD-(L)1 blockage, a checkpoint inhibitor, has been adopted as another line of treatment. A sequential strategy to enhance the efficacy of combination docetaxel and nintedanib after immunotherapy, correlated with genomic mutation, has been explored. METHOD: A retrospective cohort study of 56 patients from 8 centers in Thailand who received combination docetaxel and nintedanib via the Thai nintedanib Named Patient Use program was conducted. Demographic characteristics, treatment details, and treatment responses were retrieved from medical records. RESULTS: The majority of patients were male (62.5%) with adenocarcinoma subtype (88%). Thirty-five percent had sensitizing EGFR mutation. Combination docetaxel and nintedanib was given as second to fourth line of treatment. Median PFS of docetaxel/nintedanib was 5.6 months [95% CI 4.8-6.9]. Median OS of the entire cohort was 22.5 months [95% CI 20.2-31.1]. Among them, only four patients received this combination after immunotherapy which limited the validity of efficacy analysis. Median PFS of those four patients was 7.9 months [range 5.2-9.1] which was slightly higher than the remaining cohort (median PFS 4.5 months, 95% CI: 4.0-6.0, p-value 0.09). Among the adenocarcinoma subtype, a relapse-time of platinum-doublet chemotherapy of more than 6 months was solely indicated as a benefit of combination docetaxel/nintedanib treatment compared to the relapse-time of platinum-doublet chemotherapy of less than 6 months by multivariate HR of PFS 0.32 [95% CI: 0.14-0.68, p-value 0.003]. CONCLUSION: Combination docetaxel and nintedanib provided more benefit in relapse-time of platinum-doublet chemotherapy of more than 6 months in advanced stage adenocarcinoma lung cancer. Neither EGFR nor ALK alteration influenced the outcome of treatment.

10.
Clin Mol Hepatol ; 25(4): 366-373, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31309773

RESUMO

BACKGROUND/AIMS: Hepatitis B virus reactivation (HBVr) following chemotherapy (CMT) is well-known among hematologic malignancies, and screening recommendations are established. However, HBVr data in solid organ malignancy (SOM) patients are limited. This study aims to determine hepatitis B surface antigen (HBsAg) screening rates, HBV prevalence, and the rate of significant hepatitis caused by HBVr in SOM patients undergoing CMT. METHODS: Based on the Oncology unit's registration database from 2009-2013, we retrospectively reviewed records of all SOM patients ≥18 years undergoing CMT at Songklanagarind Hospital who were followed until death or ≥6 months after CMT sessions. Exclusion criteria included patients without baseline liver function tests (LFTs) and who underwent CMT before the study period. We obtained and analyzed baseline clinical characteristics, HBsAg screening, and LFT data during follow-up. RESULTS: Of 3,231 cases in the database, 810 were eligible. The overall HBsAg screening rate in the 5-year period was 27.7%. Screening rates were low from 2009-2012 (7.8-21%) and increased in 2013 to 82.9%. The prevalence of HBV among screened patients was 7.1%. Of those, 75% underwent prophylactic antiviral therapy. During the 6-month follow-up period, there were three cases of significant hepatitis caused by HBVr (4.2% of all significant hepatitis cases); all were in the unscreened group. CONCLUSION: The prevalence of HBV in SOM patients undergoing CMT in our study was similar to the estimated prevalence in general Thai population, but the screening rate was quite low. Cases of HBVr causing significant hepatitis occurred in the unscreened group; therefore, HBV screening and treatment in SOM patients should be considered in HBV-endemic areas.


Assuntos
Vírus da Hepatite B/fisiologia , Hepatite B/patologia , Idoso , Antivirais/uso terapêutico , Feminino , Hepatite B/complicações , Hepatite B/tratamento farmacológico , Antígenos de Superfície da Hepatite B/sangue , Vírus da Hepatite B/isolamento & purificação , Humanos , Fígado/metabolismo , Fígado/patologia , Testes de Função Hepática , Masculino , Pessoa de Meia-Idade , Neoplasias/complicações , Neoplasias/patologia , Estudos Retrospectivos , Tailândia , Ativação Viral
11.
Int J Cancer ; 140(2): 400-410, 2017 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-27711972

RESUMO

The consistent appearance of specific chromosomal translocations in multiple myeloma has suggested that the positioning of chromosomes in the interphase nucleus might play a role in the occurrence of particular chromosomal rearrangements associated with malignant transformation. Using fluorescence in situ hybridization, we have determined the positions of selected chromosome pairs (18 and 19, 9 and 22, 4 and 14, 14 and 16, 11 and 14) in interphase nuclei of myeloma cells compared to normal lymphocytes of treatment-naïve patients. All chromosome pairs were arranged in a nonrandom pattern. Chromosomes commonly involved in myeloma-associated translocations (4 and 14, 14 and 16, 11 and 14) were found in close spatial proximity, and this is correlated with the occurrence of overlapping chromosome territories. The spatial distribution of chromosomes may increase the possibility of chromosomal translocations in multiple myeloma.


Assuntos
Cromossomos/genética , Linfócitos/patologia , Gamopatia Monoclonal de Significância Indeterminada/genética , Mieloma Múltiplo/genética , Mieloma Múltiplo/patologia , Paraproteinemias/genética , Idoso , Núcleo Celular/genética , Humanos , Hibridização in Situ Fluorescente/métodos , Pessoa de Meia-Idade , Gamopatia Monoclonal de Significância Indeterminada/patologia , Paraproteinemias/patologia , Projetos Piloto , Translocação Genética/genética
12.
Oncol Res Treat ; 39(11): 688-694, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27855414

RESUMO

BACKGROUND: Cisplatin-based chemotherapy followed by surgical resection of the residual tumor remains the standard of care for patients with mediastinal germ cell tumors (MGCTs). To prevent pulmonary complications, a non-bleomycin-containing regimen is generally preferred. This study aims to review the clinical characteristics and outcomes of these patients. METHODS: A retrospective chart review was undertaken in patients treated for MGCTs between 2003 and 2013. RESULTS: A total of 40 patients were enrolled; 7 patients were diagnosed with seminoma, while 33 patients had non-seminoma. 92% of patients received chemotherapy as a first treatment modality: 87% bleomycin, etoposide and cisplatin; 13% etoposide and cisplatin, with an objective response rate of 61.3%. Among these, 44% achieved a complete serological response. 17 patients underwent surgical resection of the residual tumor. No patient suffered from pulmonary complications after surgery. The 5-year overall survival (OS) was 71.4 and 27.3% in seminoma and non-seminoma patients, respectively (p = 0.051). For those who received chemotherapy followed by surgical resection with no viable tumor or only mature teratoma detected, the 5-year OS was 72.7% compared with 20.7% in patients not treated with surgery (p = 0.02). CONCLUSION: Our study confirmed the importance of a multimodality approach with primary chemotherapy followed by surgical resection of the residual tumor. A bleomycin-containing regimen can be safely used in this setting.


Assuntos
Bleomicina/administração & dosagem , Neoplasias do Mediastino/tratamento farmacológico , Neoplasias do Mediastino/mortalidade , Recidiva Local de Neoplasia/mortalidade , Neoplasias Embrionárias de Células Germinativas/tratamento farmacológico , Neoplasias Embrionárias de Células Germinativas/mortalidade , Adolescente , Adulto , Antibióticos Antineoplásicos/administração & dosagem , Terapia Combinada/mortalidade , Feminino , Humanos , Estudos Longitudinais , Masculino , Neoplasias do Mediastino/diagnóstico , Recidiva Local de Neoplasia/prevenção & controle , Neoplasias Embrionárias de Células Germinativas/diagnóstico , Prevalência , Prognóstico , Estudos Retrospectivos , Fatores de Risco , Taxa de Sobrevida , Tailândia/epidemiologia , Resultado do Tratamento , Adulto Jovem
13.
J Cell Biochem ; 116(5): 704-10, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25501803

RESUMO

The mammalian nucleus has a distinct substructure that cannot be visualized directly by conventional microscopy. In this study, the organization of the DNA within the nucleus of multiple myeloma (MM) cells, their precursor cells (monoclonal gammopathy of undetermined significance; MGUS) and control lymphocytes of the representative patients is visualized and quantified by superresolution microscopy. Three-dimensional structured illumination microscopy (3D-SIM) increases the spatial resolution beyond the limits of conventional widefield fluorescence microscopy. 3D-SIM reveals new insights into the nuclear architecture of cancer as we show for the first time that it resolves organizational differences in intranuclear DNA organization of myeloma cells in MGUS and in MM patients. In addition, we report a significant increase in nuclear submicron DNA structure and structure of the DNA-free space in myeloma nuclei compared to normal lymphocyte nuclei. Our study provides previously unknown details of the nanoscopic DNA architecture of interphase nuclei of the normal lymphocytes, MGUS and MM cells. This study opens new avenues to understanding the disease progression from MGUS to MM.


Assuntos
Núcleo Celular/ultraestrutura , DNA/ultraestrutura , Gamopatia Monoclonal de Significância Indeterminada/patologia , Mieloma Múltiplo/patologia , Idoso , Idoso de 80 Anos ou mais , Linhagem Celular Tumoral , Humanos , Linfócitos/ultraestrutura , Microscopia , Pessoa de Meia-Idade , Gamopatia Monoclonal de Significância Indeterminada/genética , Mieloma Múltiplo/genética
14.
Transl Oncol ; 6(6): 749-56, 2013 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-24466378

RESUMO

Multiple myeloma (MM) is preceded by monoclonal gammopathy of undetermined significance (MGUS). Up to date, it is difficult to predict an individual's time to disease progression and the treatment response. To examine whether the nuclear telomeric architecture will unravel some of these questions, we carried out. Three-dimensional (3D) telomere analysis on samples from patients diagnosed with MGUS and MM, as well as from patients who went into relapse. Telomere signal intensity, number of telomere aggregates, nuclear volume, and the overall nuclear telomere distribution (a/c ratio) were analyzed. The telomeric profiles allowed for the differentiation of the disease stages. The telomeric profiles of myeloma cells obtained from blood and bone marrow aspirates were identical. Based on this study, we discuss the use of 3D telomere profiling as a potential future tool for risk stratification and personalized treatment decisions.

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