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1.
Acta Med Indones ; 56(1): 102-106, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38561890

RESUMO

Ocular melanoma stands as the predominant primary intraocular malignancy, albeit infrequently exhibiting ipsilateral inflammatory manifestations. In this article, we present an exceptional case involving a middle-aged male who presented with unilateral ocular choroidal melanoma alongside bilateral retinal vasculitis. The patient initially received temporary steroid treatment, followed by brachytherapy, which contributed to the resolution of vasculitis symptoms. The study aims to document the atypical occurrence of bilateral retinal vasculitis, which could potentially masquerade as melanoma, emphasizing the need for heightened vigilance and further investigations when encountering choroidal masses in its presence. Future research endeavors are warranted to better understand the incidence of such occurrences in this context.


Assuntos
Neoplasias da Coroide , Melanoma , Vasculite Retiniana , Neoplasias Uveais , Pessoa de Meia-Idade , Humanos , Masculino , Melanoma/complicações , Melanoma/diagnóstico , Melanoma/patologia , Neoplasias da Coroide/diagnóstico , Neoplasias da Coroide/radioterapia , Neoplasias da Coroide/patologia , Neoplasias Uveais/diagnóstico
2.
Zebrafish ; 21(2): 137-143, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38621208

RESUMO

This study outlines a 2-week laboratory module for an authentic cell biology undergraduate research experience that uses zebrafish (Danio rerio), a popular model organism for research. Previous research has indicated that course-based undergraduate research experiences such as this one increase student confidence, active learning, and retention. During this research experience, students investigate variations in pigmentation in the caudal fins of wild type (WT) and transgenic fish [Tg(mitfa:GNAQQ209L)]. The transgenic fish express a hyperactive Gα protein, GNAQQ209L, under the melanocyte-specific mitfa promoter, offering insights into uveal melanoma, a common eye cancer. Students specifically analyze the black pigmented cells, melanophores, within the caudal fin. We determined that the transgenic zebrafish have increased pigmentation in their caudal fins, but smaller melanophores. These results suggest there are more melanophores in the Tg(mitfa:GNAQQ209L) fish compared to the WT. Future undergraduate research could investigate these cellular differences. This research experience imparts microscopy and image analysis skills and instills the ability to grapple with large datasets, statistical tests, and data interpretation in alignment with biology education principles. Post-laboratory surveys reveal students attain confidence in the above skills and in handling animals, along with a deeper appreciation for model organism research and its relevance to cancer cell biology.


Assuntos
Melanoma , Pigmentação , Neoplasias Uveais , Peixe-Zebra , Humanos , Animais , Peixe-Zebra/genética , Animais Geneticamente Modificados , Estudantes , Tamanho Celular
3.
J Exp Med ; 221(6)2024 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-38563818

RESUMO

Uveal melanoma (UM) is the most common cancer of the eye. The loss of chromosome 3 (M3) is associated with a high risk of metastases. M3 tumors are more infiltrated by T-lymphocytes than low-risk disomic-3 (D3) tumors, contrasting with other tumor types in which T cell infiltration correlates with better prognosis. Whether these T cells represent an antitumor response and how these T cells would be primed in the eye are both unknown. Herein, we characterized the T cells infiltrating primary UMs. CD8+ and Treg cells were more abundant in M3 than in D3 tumors. CD39+PD-1+CD8+ T cells were enriched in M3 tumors, suggesting specific responses to tumor antigen (Ag) as confirmed using HLA-A2:Melan-A tetramers. scRNAseq-VDJ analysis of T cells evidenced high numbers of proliferating CD39+PD1+CD8+ clonal expansions, suggesting in situ antitumor Ag responses. TCRseq and tumor-Ag tetramer staining characterized the recirculation pattern of the antitumor responses in M3 and D3 tumors. Thus, tumor-Ag responses occur in localized UMs, raising the question of the priming mechanisms in the absence of known lymphatic drainage.


Assuntos
Melanoma , Neoplasias Uveais , Humanos , Melanoma/terapia , Linfócitos T CD8-Positivos , Drenagem
4.
Mol Vis ; 30: 160-166, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38601020

RESUMO

Purpose: Uveal melanoma (UM) is a deadly cancer with limited therapeutic options. At advanced stages, UM cells metastasize almost exclusively into the liver, where targeting metastatic UM cells remain a clinical challenge. Transforming growth factor beta (TGF-ß) exhibits a functional duality in cancer, with one arm limiting tumor growth at an early stage and the second arm promoting metastasis at an advanced stage, notably by inducing an epithelial-to-mesenchymal transition. Thus, we hypothesized that targeting the TGF-ß pathway could be relevant in the treatment of metastatic UM. Methods: In this study, we first characterized the pseudoepithelial/mesenchymal phenotype of UM cell lines Mel270 and 92.1. We then treated the cell lines with TGF-ß to evaluate their responsiveness to the cytokine and to characterize the functional impact of TGF-ß on their cell viability. Results: The results demonstrated, first, that the UM cell lines exhibited a mesenchymal phenotype and responded to TGF-ß treatment in vitro and, second, that TGF-ß promoted a cytostatic effect on the UM cell lines. Conclusions: Our findings indicate that UM cells are sensitive to the two arms of TGF-ß signaling, which suggests that targeting the TGF-ß pathway could be challenging in UM and would require a precise selection of patients in which only the prometastatic arm of TGF-ß is activated.


Assuntos
Melanoma , Transdução de Sinais , Fator de Crescimento Transformador beta , Neoplasias Uveais , Humanos , Linhagem Celular Tumoral , Melanoma/tratamento farmacológico , Melanoma/genética , Melanoma/patologia , Fenótipo , Fator de Crescimento Transformador beta/genética , Fator de Crescimento Transformador beta1 , Neoplasias Uveais/tratamento farmacológico , Neoplasias Uveais/genética
5.
Cancer Control ; 31: 10732748241246898, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38605434

RESUMO

BACKGROUND: Percutaneous Hepatic Perfusion (PHP) is a liver directed regional therapy recently FDA approved for metastatic uveal melanoma to the liver involving percutaneous isolation of liver, saturation of the entire liver with high-dose chemotherapy and filtration extracorporeally though in line filters and veno-venous bypass. The procedure is associated with hemodynamic shifts requiring hemodynamic support and blood product resuscitation due to coagulopathy. OBJECTIVE: To assess the cardiac safety and subsequent clinically significant sequalae of this therapy. METHODS: Consecutive PHP procedures done at our center between 2010-2022 were assessed retrospectively. Cardiac risk factors, post procedural cardiac enzymes, electrocardiograms, and transthoracic echocardiograms along with 90-day cardiac outcomes were reviewed. All data were reviewed by cardio-oncologists at our institution. RESULTS: Of 37 patients reviewed, mean age was 63 years and 57% were women. 132 procedures were performed with an average of 3.57 procedures per patient. 68.6% of patients had elevated troponin during at least 1 procedure. No patients were found to have acute coronary syndrome, heart failure, unstable arrhythmias, or cardiac death. No patients had notable echocardiographic changes. 10.8% of patients with positive troponin had asymptomatic transient electrocardiographic changes not meeting criteria for myocardial infarction. One patient had non-sustained ventricular tachycardiac intra-operatively which did not recur subsequently. Three patients died from non-cardiac causes within 90-days. There was no oncology treatment interruption, even in those with troponin elevation. In multivariable analysis, a history of hyperlipidemia was a predictor of postoperative troponin elevation. (P = .042). CONCLUSION: Percutaneous Hepatic Perfusion is safe and associated with a transient, asymptomatic troponin elevation peri-operatively without major adverse cardiac events at 90 days. The observed troponin elevation is likely secondary to coronary demand-supply mismatch related to procedural hemodynamic shifts, hypotension, and anemia.


Percutaneous hepatic perfusion using melphalan in patients with uveal melanoma and liver metastases carries no significant cardiac adverse events.


Assuntos
Neoplasias Hepáticas , Melanoma , Melfalan , Neoplasias Uveais , Humanos , Feminino , Pessoa de Meia-Idade , Masculino , Antineoplásicos Alquilantes , Estudos Retrospectivos , Quimioterapia do Câncer por Perfusão Regional/métodos , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/secundário , Recidiva Local de Neoplasia/tratamento farmacológico , Perfusão
6.
Nat Commun ; 15(1): 2863, 2024 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-38627362

RESUMO

Immune checkpoint inhibition has shown success in treating metastatic cutaneous melanoma but has limited efficacy against metastatic uveal melanoma, a rare variant arising from the immune privileged eye. To better understand this resistance, we comprehensively profile 100 human uveal melanoma metastases using clinicogenomics, transcriptomics, and tumor infiltrating lymphocyte potency assessment. We find that over half of these metastases harbor tumor infiltrating lymphocytes with potent autologous tumor specificity, despite low mutational burden and resistance to prior immunotherapies. However, we observe strikingly low intratumoral T cell receptor clonality within the tumor microenvironment even after prior immunotherapies. To harness these quiescent tumor infiltrating lymphocytes, we develop a transcriptomic biomarker to enable in vivo identification and ex vivo liberation to counter their growth suppression. Finally, we demonstrate that adoptive transfer of these transcriptomically selected tumor infiltrating lymphocytes can promote tumor immunity in patients with metastatic uveal melanoma when other immunotherapies are incapable.


Assuntos
Melanoma , Neoplasias Cutâneas , Neoplasias Uveais , Humanos , Melanoma/genética , Melanoma/terapia , Neoplasias Uveais/genética , Neoplasias Uveais/terapia , Linfócitos do Interstício Tumoral , Imunoterapia , Microambiente Tumoral/genética
7.
Invest Ophthalmol Vis Sci ; 65(4): 12, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38573618

RESUMO

Purpose: To explore the genetic background of choroidal and ciliary body melanoma among children and young adults, with special focus on BAP1 germline variants in this age group. Methods: Patients under the age of 25 and with confirmed choroidal or ciliary body melanoma were included in this retrospective, multicenter observational study. Nuclear BAP1 immunopositivity was used to evaluate the presence of functional BAP1 in the tumor. Next-generation sequencing using Ion Torrent platform was used to determine pathogenic variants of BAP1, EIF1AX, SF3B1, GNAQ and GNA11 and chromosome 3 status in the tumor or in DNA extracted from blood or saliva. Survival was analyzed using Kaplan-Meier estimates. Results: The mean age at diagnosis was 17 years (range 5.0-24.8). A germline BAP1 pathogenic variant was identified in an 18-year-old patient, and a somatic variant, based mainly on immunohistochemistry, in 13 (42%) of 31 available specimens. One tumor had a somatic SF3B1 pathogenic variant. Disomy 3 and the absence of a BAP1 pathogenic variant in the tumor predicted the longest metastasis-free survival. Males showed longer metastasis-free survival than females (P = 0.018). Conclusions: We did not find a stronger-than-average BAP1 germline predisposition for choroidal and ciliary body melanoma among children and young adults compared to adults. Males had a more favorable survival and disomy 3, and the absence of a BAP1 mutation in the tumor tissue predicted the most favorable metastasis-free survival. A BAP1 germline pathogenic variant was identified in one patient (1%), and a somatic variant based mainly on immunohistochemistry in 13 (42%).


Assuntos
Melanoma , Neoplasias Uveais , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Adulto Jovem , Corpo Ciliar , Melanoma/genética , Estudos Retrospectivos , Neoplasias Uveais/genética
8.
Sci Rep ; 14(1): 9146, 2024 04 21.
Artigo em Inglês | MEDLINE | ID: mdl-38644411

RESUMO

Uveal melanoma (UVM) is the most common primary tumor in adult human eyes. Costimulatory molecules (CMs) are important in maintaining T cell biological functions and regulating immune responses. To investigate the role of CMs in UVM and exploit prognostic signature by bioinformatics analysis. This study aimed to identify and validate a CMs associated signature and investigate its role in the progression and prognosis of UVM. The expression profile data of training cohort and validation cohort were downloaded from The Cancer Genome Atlas (TCGA) dataset and the Gene Expression Omnibus (GEO) dataset. 60 CM genes were identified, and 34 genes were associated with prognosis by univariate Cox regression. A prognostic signature was established with six CM genes. Further, high- and low-risk groups were divided by the median, and Kaplan-Meier (K-M) curves indicated that high-risk patients presented a poorer prognosis. We analyzed the correlation of gender, age, stage, and risk score on prognosis by univariate and multivariate regression analysis. We found that risk score was the only risk factor for prognosis. Through the integration of the tumor immune microenvironment (TIME), it was found that the high-risk group presented more immune cell infiltration and expression of immune checkpoints and obtained higher immune scores. Enrichment analysis of the biological functions of the two groups revealed that the differential parts were mainly related to cell-cell adhesion, regulation of T-cell activation, and cytokine-cytokine receptor interaction. No differences in tumor mutation burden (TMB) were found between the two groups. GNA11 and BAP1 have higher mutation frequencies in high-risk patients. Finally, based on the Genomics of Drug Sensitivity in Cancer 2 (GDSC2) dataset, drug sensitivity analysis found that high-risk patients may be potential beneficiaries of the treatment of crizotinib or temozolomide. Taken together, our CM-related prognostic signature is a reliable biomarker that may provide ideas for future treatments for the disease.


Assuntos
Biomarcadores Tumorais , Regulação Neoplásica da Expressão Gênica , Melanoma , Neoplasias Uveais , Humanos , Neoplasias Uveais/genética , Neoplasias Uveais/mortalidade , Neoplasias Uveais/imunologia , Melanoma/genética , Melanoma/mortalidade , Melanoma/imunologia , Melanoma/patologia , Prognóstico , Masculino , Feminino , Pessoa de Meia-Idade , Biomarcadores Tumorais/genética , Microambiente Tumoral/imunologia , Microambiente Tumoral/genética , Perfilação da Expressão Gênica , Ubiquitina Tiolesterase/genética , Proteínas Supressoras de Tumor/genética , Proteínas Supressoras de Tumor/metabolismo , Adulto , Idoso , Transcriptoma , Estimativa de Kaplan-Meier
9.
BMC Ophthalmol ; 24(1): 190, 2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38658861

RESUMO

BACKGROUND: Ciliary body tumor is extremely rare and treatment is challenging. The aim of this study is to present our experience in treating this rare entity, especially large tumors with more than 5 clock hours of involvement, and to evaluate the surgical outcomes and complications of local resection via partial lamellar sclerouvectomy in four cases of ciliary body tumors in China. METHODS: Four patients with ciliary body tumors underwent partial lamellar sclerouvectomy between October 2019 and April 2023 in Shanghai General Hospital, China. Tumor features, histopathologic findings, complications, visual acuity, and surgical outcomes were reviewed at a mean follow-up of 20.8 months. RESULTS: Four patients with a mean age of 31.8 years were included in this study. The histopathological diagnosis was adenoma of non-pigmented ciliary epithelium (ANPCE), schwannoma, and multiple ciliary body pigment epithelial cysts. The mean largest tumor base diameter was 6.00 mm (range: 2.00-10.00) and the mean tumor thickness was 3.50 mm (range: 2.00-5.00). Preoperative complications included cataract in 3 (75%) eyes, lens dislocation in 2 (50%), and secondary glaucoma in 1 (25%). Temporary ocular hypotonia was observed in one case and no other postoperative complications were observed. At a mean follow-up of 20.8 months, the best corrected visual acuity increased in 3 eyes and was stable in 1 eye. Tumor recurrence was absent in all eyes. All patients were alive at the end of follow-up. CONCLUSIONS: Local tumor resection via PLSU is useful in the treatment of ciliary body tumors, including large tumors occupying more than five clock hours of pars plicata. Surgery-related complications were manageable with adequate preoperative assessment and careful operation during surgery.


Assuntos
Corpo Ciliar , Esclera , Neoplasias Uveais , Acuidade Visual , Humanos , Corpo Ciliar/cirurgia , Corpo Ciliar/patologia , Neoplasias Uveais/cirurgia , Neoplasias Uveais/diagnóstico , Masculino , Feminino , Adulto , Acuidade Visual/fisiologia , Esclera/cirurgia , Esclera/patologia , Procedimentos Cirúrgicos Oftalmológicos/métodos , Pessoa de Meia-Idade , Estudos Retrospectivos , Adulto Jovem , Seguimentos , Adolescente
10.
BMC Cancer ; 24(1): 519, 2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38654216

RESUMO

BACKGROUND: Uveal melanoma (UVM) is the most common primary intraocular tumor in adults, with a median survival of 4-5 months following metastasis. DNA damage response (DDR) upregulation in UVM, which could be linked to its frequent activation of the PI3K/AKT pathway, contributes to its treatment resistance. We have reported that embryonic stem cell microenvironments (ESCMe) can revert cancer cells to less aggressive states through downregulation of the PI3K signaling, showing promise in modulating the DDR of UVM. METHODS: Since nonhomologous end joining (NHEJ) is the main DNA repair mechanism in UVM, this study utilized gene expression analysis and survival prognosis analysis to investigate the role of NHEJ-related genes in UVM based on public databases. Xenograft mouse models were established to assess the therapeutic potential of ESC transplantation and exposure to ESC-conditioned medium (ESC-CM) on key DNA repair pathways in UVM. Quantitative PCR and immunohistochemistry were used to analyze NHEJ pathway-related gene expression in UVM and surrounding normal tissues. Apoptosis in UVM tissues was evaluated using the TUNEL assay. RESULTS: PRKDC, KU70, XRCC5, LIG4 and PARP1 showed significant correlations with UM progression. High expression of PRKDC and XRCC5 predicted poorer overall survival, while low PARP1 and XRCC6 expression predicted better disease-free survival in UVM patients. ESCMe treatment significantly inhibited the NHEJ pathway transcriptionally and translationally and promoted apoptosis in tumor tissues in mice bearing UVM. Furthermore, ESC transplantation enhanced DDR activities in surrounding normal cells, potentially mitigating the side effects of cancer therapy. Notably, direct cell-to-cell contact with ESCs was more effective than their secreted factors in regulating the NHEJ pathway. CONCLUSIONS: Our results suggest that NHEJ-related genes might serve as prognostic markers and therapeutic targets in UVM. These findings support the therapeutic potential of ESC-based therapy in enhancing UVM sensitivity to radiochemotherapy and improving treatment outcomes while minimizing damage to healthy cells.


Assuntos
Dano ao DNA , Melanoma , Microambiente Tumoral , Neoplasias Uveais , Animais , Humanos , Neoplasias Uveais/genética , Neoplasias Uveais/patologia , Neoplasias Uveais/metabolismo , Neoplasias Uveais/mortalidade , Camundongos , Melanoma/genética , Melanoma/patologia , Melanoma/metabolismo , Melanoma/terapia , Células-Tronco Embrionárias/metabolismo , Reparo do DNA por Junção de Extremidades , Linhagem Celular Tumoral , Apoptose/genética , Regulação Neoplásica da Expressão Gênica , Feminino , Ensaios Antitumorais Modelo de Xenoenxerto , Prognóstico , Masculino , Autoantígeno Ku/metabolismo , Autoantígeno Ku/genética , Transdução de Sinais , Reparo do DNA
11.
J Cancer Res Clin Oncol ; 150(4): 202, 2024 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-38630320

RESUMO

PURPOSE: Choroidal melanoma (CM), a kind of malignant tumor, is the main type of Uveal melanoma and one half of CM patients develop metastases. As a member of Eph/ephrin pathway that plays vital role in tumors, EphrinA3 (EFNA3) has been proved to promote tumorigenesis in many tumors. But the effect of EFNA3 in CM has not been studied yet. Through inhibiting angiogenesis, inducing apoptosis and autophagy and so on, Artesunate (ART) plays a key anti-tumor role in many tumors, including CM. However, the exact mechanisms of anti-tumor in CM remain unclear. METHODS: The UALCAN and TIMER v2.0 database analyzed the role of EFNA3 in CM patients. Quantitative real time polymerase chain reaction (qPCR) and Western blot were used to detect the expression of EFNA3 in CM. The growth ability of CM was tested by clonogenic assay and Cell counting kit-8 assay, and the migration ability using Transwell assay. RESULTS: Our results found EFNA3 boosted CM cells' growth and migration through activating Stat3/Akt signaling pathway, while ART inhibited the tumor promoting effect of CM via downregulating EFNA3. In xenograft tumor model, EFNA3 knockdown and ART significantly inhibited tumor growth. CONCLUSION: EFNA3 could be a valuable prognostic factor in CM.


Assuntos
Melanoma , Neoplasias Uveais , Humanos , Animais , Melanoma/tratamento farmacológico , Melanoma/genética , Artesunato/farmacologia , Proteínas Proto-Oncogênicas c-akt , Carcinogênese , Transformação Celular Neoplásica , Modelos Animais de Doenças , Transdução de Sinais
12.
Sci Rep ; 14(1): 7887, 2024 04 03.
Artigo em Inglês | MEDLINE | ID: mdl-38570507

RESUMO

Several studies have evaluated immune checkpoint inhibitors (ICIs) for metastatic uveal melanoma; however, the efficacy of ICIs in the previous studies varied greatly. In this systematic review, we searched for prospective or retrospective studies on single or dual-ICIs for metastatic uveal melanoma treatment. A random-effect model meta-analysis with generic inverse-variance was conducted, and 36 articles representing 41 cohorts of 1414 patients with metastatic uveal melanoma were included. The pooled outcomes were as follows: objective response rate (ORR) was 5.6% (95% confidence interval [95%CI] 3.7-7.5%; I2, 36%), disease control rate (DCR) was 32.5% (95% CI 27.2-37.7%; I2, 73%), median progression-free survival was 2.8 months (95% CI 2.7-2.9 months; I2, 26%), and median overall survival (OS) was 11.2 months (95% CI 9.6-13.2 months; I2, 74%). Compared to single-agent ICI, dual ICI led to better ORR (single-agent: 3.4% [95% CI 1.8-5.1]; dual-agent: 12.4% [95% CI 8.0-16.9]; P < 0.001), DCR (single-agent: 29.3%, [95% CI 23.4-35.2]; dual-agent: 44.3% [95% CI 31.7-56.8]; P = 0.03), and OS (single-agent: 9.8 months [95% CI 8.0-12.2]; dual-agent: 16.3 months [95% CI 13.5-19.7]; P < 0.001). Our analysis provided treatment outcomes as described above. Dual-ICIs appear better than single-agent ICIs for the treatment of metastatic uveal melanoma.


Assuntos
Inibidores de Checkpoint Imunológico , Melanoma , Segunda Neoplasia Primária , Neoplasias Uveais , Humanos , Inibidores de Checkpoint Imunológico/farmacologia , Inibidores de Checkpoint Imunológico/uso terapêutico , Estudos Prospectivos , Estudos Retrospectivos , Medicamentos Genéricos
13.
Rom J Morphol Embryol ; 65(1): 35-44, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38527982

RESUMO

Ocular melanoma is a rare but complex disease in current medical practice. Our retrospective study spans over a period of 28 years and analyzed uveal and conjunctival melanomas that were consecutively admitted, diagnosed, and treated in the 2nd Ophthalmology Clinic of Prof. Dr. Nicolae Oblu Emergency Clinical Hospital, Iasi, Romania. The patients were selected from the records of the Department of Pathology of our Hospital, being diagnosed by standard histopathological techniques. The aim of this study was to summarize the epidemiological and pathological aspects of uveal and conjunctival melanomas in Northeastern region of Romania. In our study, we did not notice a predilection of uveal and conjunctival melanoma to one particular gender. The most common histological subtypes of ocular melanomas were the heavily pigmented spindle cell subtype, followed by the epithelioid subtype. Our patients sought medical help in a timely manner, before the systemic invasion of the disease could develop.


Assuntos
Neoplasias da Túnica Conjuntiva , Neoplasias Oculares , Melanoma , Neoplasias Uveais , Humanos , Melanoma/epidemiologia , Melanoma/patologia , Romênia/epidemiologia , Estudos Retrospectivos , Neoplasias Oculares/epidemiologia , Neoplasias da Túnica Conjuntiva/diagnóstico , Neoplasias Uveais/epidemiologia , Neoplasias Uveais/patologia
14.
Eur J Cancer ; 202: 114009, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38547774

RESUMO

AIMS: The MAPK pathway is constitutively activated in uveal melanoma (UM). Selumetinib (AZD6244, ARRY-142886), a MEK inhibitor, has shown limited activity as monotherapy in metastatic UM. Pre-clinical studies support synergistic cytotoxic activity for MEK inhibitors combined with taxanes, and here we sought to assess the clinical efficacy of combining selumetinib and paclitaxel. PATIENTS AND METHODS: Seventy-seven patients with metastatic UM who had not received prior chemotherapy were randomised to selumetinib alone, or combined with paclitaxel with or without interruption in selumetinib two days before paclitaxel. The primary endpoint was progression free survival (PFS). After amendment, the combination arms were combined for analysis and the sample size adjusted to detect a hazard ratio (HR): 0.55, 80% power at 1-sided 5% significance level. RESULTS: The median PFS in the combination arms was 4.8 months (95% CI: 3.8 - 5.6) compared with 3.4 months (2.0 - 3.9) in the selumetinib arm (HR 0.62 [90% CI 0.41 - 0.92], 1-sided p-value = 0.022). ORR was 14% and 4% in the combination and monotherapy arms respectively. Median OS was 9 months for the combination and was not significantly different from selumetinib alone (10 months) with HR of 0.98 [90% CI 0.58 - 1.66], 1-sided p-value = 0.469. Toxicity was in keeping with the known profiles of the agents involved. CONCLUSIONS: SelPac met its primary endpoint, demonstrating an improvement in PFS for combination selumetinib and paclitaxel. No improvement in OS was observed, and the modest improvement in PFS is not practice changing.


Assuntos
Benzimidazóis , Melanoma , Paclitaxel , Neoplasias Uveais , Humanos , Paclitaxel/efeitos adversos , Melanoma/patologia , Inibidores de Proteínas Quinases/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Quinases de Proteína Quinase Ativadas por Mitógeno
16.
J Cancer Res Clin Oncol ; 150(3): 121, 2024 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-38467935

RESUMO

PURPOSE: Uveal melanoma (UM) is the most common primary malignant intraocular tumor in adults, and effective clinical treatment strategies are still lacking. Autophagy is a lysosome-dependent degradation system that can encapsulate abnormal proteins, damaged organelles. However, dysfunctional autophagy has multiple types and plays a complex role in tumorigenicity depending on many factors, such as tumor stage, microenvironment, signaling pathway activation, and application of autophagic drugs. METHODS: A systematic review of the literature was conducted to analyze the role of autophagy in UM, as well as describing the development of autophagic drugs and the link between autophagy and the tumor microenvironment. RESULTS: In this review, we summarize current research advances regarding the types of autophagy, the mechanisms of autophagy, the application of autophagy inhibitors or agonists, autophagy and the tumor microenvironment. Finally, we also discuss the relationship between autophagy and UM. CONCLUSION: Understanding the molecular mechanisms of how autophagy differentially affects tumor progression may help to design better therapeutic regimens to prevent and treat UM.


Assuntos
Melanoma , Neoplasias Uveais , Humanos , Melanoma/patologia , Neoplasias Uveais/patologia , Transdução de Sinais , Autofagia , Microambiente Tumoral
17.
Clin Nucl Med ; 49(5): 489-490, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38465994

RESUMO

ABSTRACT: Uveal melanoma is the most common intraocular malignancy in adults with a high rate of metastasis and mortality. This study presented the PET/CT imaging of 18 F-AlF-NOTA-PRGD2 and 18 F-FDG in a patient with primary uveal melanoma. In addition to fundus photograph and ophthalmic ultrasonography, both 18 F-AlF-NOTA-PRGD2 and 18 F-FDG PET/CT imaging showed increased radioactive uptake in the lesions within the scan area. The tumoral lesions presented significantly higher uptake of 18 F-AlF-NOTA-PRGD2 compared with that of 18 F-FDG.


Assuntos
Amidas , Melanoma , Compostos Policíclicos , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Neoplasias Uveais , Adulto , Humanos , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada/métodos , Fluordesoxiglucose F18 , Tomografia por Emissão de Pósitrons/métodos , Melanoma/diagnóstico por imagem
18.
Gene ; 911: 148333, 2024 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-38431233

RESUMO

BACKGROUND: The elevated metastasis rate of uveal melanoma (UM) is intricately correlated with patient prognosis, significantly affecting the quality of life. S100 calcium-binding protein A4 (S100A4) has tumorigenic properties; therefore, the present study investigated the impact of S100A4 on UM cell proliferation, apoptosis, migration, and invasion using bioinformatics and in vitro experiments. METHODS: Bioinformatic analysis was used to screen S100A4 as a hub gene and predict its possible mechanism in UM cells, and the S100A4 silencing cell line was constructed. The impact of S100A4 silencing on the proliferative ability of UM cells was detected using the Cell Counting Kit-8 and colony formation assays. Annexin V-FITC/PI double fluorescence and Hoechst 33342 staining were used to observe the effects of apoptosis on UM cells. The effect of S100A4 silencing on the migratory and invasive capabilities of UM cells was assessed using wound healing and Transwell assays. Western blotting was used to detect the expression of related proteins. RESULTS: The present study found that S100A4 is a biomarker of UM, and its high expression is related to poor prognosis. After constructing the S100A4 silencing cell line, cell viability, clone number, proliferating cell nuclear antigen, X-linked inhibitor of apoptosis protein, and survivin expression were decreased in UM cells. The cell apoptosis rate and relative fluorescence intensity increased, accompanied by increased levels of Bax and caspase-3 and decreased levels of Bcl-2. Additionally, a decrease in the cell migration index and relative invasion rate was observed with increased E-cadherin expression and decreased N-cadherin and vimentin protein expression. CONCLUSION: S100A4 silencing can inhibit the proliferation, migration, and invasion and synchronously induces apoptosis in UM cells.


Assuntos
Melanoma , Proteínas S100 , Neoplasias Uveais , Humanos , Proteína A4 de Ligação a Cálcio da Família S100/genética , Proteínas S100/genética , Qualidade de Vida , Linhagem Celular Tumoral , Melanoma/genética , Carcinogênese , Movimento Celular/genética , Proliferação de Células/genética , Apoptose/genética
19.
Melanoma Res ; 34(3): 248-257, 2024 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-38469755

RESUMO

Metastatic uveal melanoma (mUM) is a rare cancer with poor prognosis, but novel treatments are emerging. Currently, there are no mUM-specific health-related quality of life (HRQL) questionnaires available for clinical research. We aimed to explore how mUM and its treatment affect HRQL and assess the content validity of existing questionnaires. Participants were patients with mUM and healthcare professionals involved in their care. Qualitative data were collected using semi-structured interviews and focus groups. Data collection and analysis used an integrative approach involving inductive questions/coding to elicit new concepts and deductive questions/coding based on domains of existing HRQL questionnaires. Initial interviews/focus groups focussed on HRQL questionnaires designed for patients with uveal melanoma or liver metastases. As new concepts were elicited, domains and items from other questionnaires were subsequently added. Seventeen patients and 16 clinicians participated. HRQL concerns assessed by uveal melanoma-specific questionnaires were largely resolved by the time of metastasis. The Functional Assessment of Cancer Therapy - Immunotherapy Module (FACT-ICM) adequately captured most immunotherapy-related side effects during initial treatment cycles. However, most patients emphasised emotional impacts over physical ones, focussing on the existential threat posed by disease amidst uncertainty about treatment accessibility and effectiveness. Patients were also concerned with treatment burden, including time commitment, travel, need for hospitalisation, and expenses. The relative importance of HRQL issues varied over time and across treatment modalities, with no single questionnaire being sufficient. Pending further development and psychometric testing, clinical researchers may need to take a modular approach to measuring the HRQL impacts of mUM.


Assuntos
Melanoma , Pesquisa Qualitativa , Qualidade de Vida , Neoplasias Uveais , Humanos , Neoplasias Uveais/psicologia , Neoplasias Uveais/patologia , Melanoma/psicologia , Feminino , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Idoso , Adulto , Metástase Neoplásica
20.
Cancer J ; 30(2): 92-101, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38527262

RESUMO

ABSTRACT: Uveal melanoma (UM), arising from intraocular melanocytes, poses a complex clinical challenge with a substantial risk of distant metastasis, often to the liver. Molecular profiling, encompassing genetic, cytogenetic, gene expression, and immunological subsets, plays a pivotal role in determining prognoses. The evolving landscape includes promising systemic treatments, such as tebentafusp, a novel immune-modulating bispecific fusion protein, and targeted therapies. Combined regional and systemic approaches, including immune checkpoint inhibitors and innovative liver-directed therapy, are also under investigation. Although recent progress has improved outcomes, ongoing research aims to address the unique challenges of UM and develop effective therapies, particularly for HLA-A*02:01-negative patients who represent a significant unmet medical need. This review comprehensively discusses the molecular characteristics of UM, risk stratification methods, and the current and future spectrum of regional and systemic therapeutic modalities.


Assuntos
Melanoma , Neoplasias Uveais , Humanos , Melanoma/terapia , Melanoma/tratamento farmacológico , Neoplasias Uveais/diagnóstico , Neoplasias Uveais/genética , Neoplasias Uveais/terapia , Prognóstico
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