Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 99
Filtrar
Más filtros

Banco de datos
Tipo del documento
Intervalo de año de publicación
1.
Immunol Invest ; : 1-22, 2024 Apr 18.
Artículo en Inglés | MEDLINE | ID: mdl-38634572

RESUMEN

BACKGROUND: Glioblastoma (GBM) is an extremely aggressive form of brain tumor with low survival rates. Current treatments such as chemotherapy, radiation, and surgery are problematic due to tumor growth, invasion, and tumor microenvironment. GBM cells are resistant to these standard treatments, and the heterogeneity of the tumor makes it difficult to find a universal approach. Progression of GBM and acquisition of resistance to therapy are due to the complex interplay between tumor cells and the TME. A significant portion of the TME consists of an inflammatory infiltrate, with microglia and macrophages being the predominant cells. METHODS: Analysis of the literature data over a course of 5 years suggest that the tumor-associated macrophages (TAMs) are capable of releasing cytokines and growth factors that promote tumor proliferation, survival, and metastasis while inhibiting immune cell function at the same time. RESULTS: Thus, immunosuppressive state, provided with this intensively studied kind of TME cells, is supposed to promote GBM development through TAMs modulation of tumor treatment-resistance and aggressiveness. Therefore, TAMs are an attractive therapeutic target in the treatment of glioblastoma. CONCLUSION: This review provides a comprehensive overview of the latest research on the nature of TAMs and the development of therapeutic strategies targeting TAMs, focusing on the variety of macrophage properties, being modulated, as well as molecular targets.

2.
Cancer Immunol Immunother ; 72(6): 1429-1444, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36460868

RESUMEN

Natural killer (NK) cells play a crucial role in the anti-tumor transaction through cytolytic activity with the help of proportionate expression of their activating receptors (ARs) and inhibitory receptors (IRs). The proliferation, differentiation, and effector's functions of NK cells were affected and regulated by CD4+CD25+ regulatory T (Treg) cells through the NKG2D receptor expressed on NK cells. It has not yet been established whether Treg cells also affects the expression and functions of other receptors of NK cell. Moreover, the effect of cyclophosphamide (CYP) treatment on the expression and functions of AR and IR receptors of NK cells regulated by Treg cells during cancer progression is not clearly understood. Therefore, we have used the metronomic dose of CYP and anti-CD25 and anti-TGF-ß to inhibit the effects of Treg cells in DL-induced tumor microenvironment and analyze the expression of ARs and IRs on NK cells and the FoxP3 level on Treg cells. It was observed that treatment of CYP and blocking antibodies not only affects the functions of tumor-associated NK cells (TANK cells) by modulating the expression of ARs and IRs in DL-induced tumor microenvironment, but also downregulates the functions of Treg cells. The findings of our study supported and suggested that the use of CYP in combination with other therapeutic approaches will effectively reduce tumor growth directly and/or indirectly by modulating the NK cell-mediated immune response of the host.


Asunto(s)
Células Asesinas Naturales , Linfoma , Humanos , Linfoma/metabolismo , Linfocitos T Reguladores , Factor de Crecimiento Transformador beta/metabolismo , Línea Celular Tumoral , Microambiente Tumoral
3.
Int J Mol Sci ; 24(9)2023 Apr 28.
Artículo en Inglés | MEDLINE | ID: mdl-37175679

RESUMEN

Autophagy is a catabolic process that is necessary for cellular homeostasis maintenance [...].


Asunto(s)
Neoplasias , Humanos , Neoplasias/genética , Neoplasias/terapia , Autofagia , Homeostasis
4.
Mol Cell Biochem ; 477(2): 593-604, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-34854022

RESUMEN

Autophagy is the process of recycling and utilization of degraded organelles and macromolecules in the cell compartments formed during the fusion of autophagosomes with lysosomes. During autophagy induction the healthy and tumor cells adapt themselves to harsh conditions such as cellular stress or insufficient supply of nutrients in the cell environment to maintain their homeostasis. Autophagy is currently seen as a form of programmed cell death along with apoptosis and necroptosis. In recent years multiple studies have considered the autophagy as a potential mechanism of anticancer therapy in malignant glioma. Although, subsequent steps in autophagy development are known and well-described, on molecular level the mechanism of autophagosome initiation and maturation using autophagy-related proteins is under investigation. This article reviews current state about the mechanism of autophagy, its molecular pathways and the most recent studies on roles of autophagy-related proteins and their isoforms in glioma progression and its treatment.


Asunto(s)
Apoptosis , Proteínas Relacionadas con la Autofagia/metabolismo , Autofagia , Glioma/metabolismo , Proteínas de Neoplasias/metabolismo , Autofagosomas/genética , Autofagosomas/metabolismo , Proteínas Relacionadas con la Autofagia/genética , Glioma/genética , Glioma/terapia , Humanos
5.
Brain ; 144(4): 1046-1066, 2021 05 07.
Artículo en Inglés | MEDLINE | ID: mdl-33893488

RESUMEN

Brain metastases are the most common type of brain tumours, harbouring an immune microenvironment that can in principle be targeted via immunotherapy. Elucidating some of the immunological intricacies of brain metastases has opened a therapeutic window to explore the potential of immune checkpoint inhibitors in this globally lethal disease. Multiple lines of evidence suggest that tumour cells hijack the immune regulatory mechanisms in the brain for the benefit of their own survival and progression. Nonetheless, the role of the immune checkpoint in the complex interplays between cancers cells and T cells and in conferring resistance to therapy remains under investigation. Meanwhile, early phase trials with immune checkpoint inhibitors have reported clinical benefit in patients with brain metastases from melanoma and non-small cell lung cancer. In this review, we explore the workings of the immune system in the brain, the immunology of brain metastases, and the current status of immune checkpoint inhibitors in the treatment of brain metastases.


Asunto(s)
Neoplasias Encefálicas/inmunología , Encéfalo/inmunología , Inhibidores de Puntos de Control Inmunológico/uso terapéutico , Metástasis de la Neoplasia/inmunología , Escape del Tumor/inmunología , Encéfalo/efectos de los fármacos , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/secundario , Humanos , Metástasis de la Neoplasia/tratamiento farmacológico , Escape del Tumor/efectos de los fármacos
6.
Lancet Oncol ; 22(8): 1103-1114, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34214495

RESUMEN

BACKGROUND: Malignant glioma is the most common and lethal primary brain tumour, with dismal survival rates and no effective treatment. We examined the safety and activity of NSC-CRAd-S-pk7, an engineered oncolytic adenovirus delivered by neural stem cells (NSCs), in patients with newly diagnosed high-grade glioma. METHODS: This was a first-in-human, open-label, phase 1, dose-escalation trial done to determine the maximal tolerated dose of NSC-CRAd-S-pk7, following a 3 + 3 design. Patients with newly diagnosed, histologically confirmed, high-grade gliomas (WHO grade III or IV) were recruited. After neurosurgical resection, NSC-CRAd-S-pk7 was injected into the walls of the resection cavity. The first patient cohort received a dose starting at 6·25 × 1010 viral particles administered by 5·00 × 107 NSCs, the second cohort a dose of 1·25 × 1011 viral particles administered by 1·00 × 108 NSCs, and the third cohort a dose of 1·875 × 1011 viral particles administered by 1·50 × 108 NSCs. No further dose escalation was planned. Within 10-14 days, treatment with temozolomide and radiotherapy was initiated. Primary endpoints were safety and toxicity profile and the maximum tolerated dose for a future phase 2 trial. All analyses were done in all patients who were included in the trial and received the study treatment and were not excluded from the study. Recruitment is complete and the trial is finished. The trial is registered with ClinicalTrials.gov, NCT03072134. FINDINGS: Between April 24, 2017, and Nov 13, 2019, 12 patients with newly diagnosed, malignant gliomas were recruited and included in the safety analysis. Histopathological evaluation identified 11 (92%) of 12 patients with glioblastoma and one (8%) of 12 patients with anaplastic astrocytoma. The median follow-up was 18 months (IQR 14-22). One patient receiving 1·50 × 108 NSCs loading 1·875 × 1011 viral particles developed viral meningitis (grade 3) due to the inadvertent injection of NSC-CRAd-S-pk7 into the lateral ventricle. Otherwise, treatment was safe as no formal dose-limiting toxicity was reached, so 1·50 × 108 NSCs loading 1·875 × 1011 viral particles was recommended as a phase 2 trial dose. There were no treatment-related deaths. The median progression-free survival was 9·1 months (95% CI 8·5-not reached) and median overall survival was 18·4 months (15·7-not reached). INTERPRETATION: NSC-CRAd-S-pk7 treatment was feasible and safe. Our immunological and histopathological findings support continued investigation of NSC-CRAd-S-pk7 in a phase 2/3 clinical trial. FUNDING: US National Institutes of Health.


Asunto(s)
Neoplasias Encefálicas/terapia , Glioma/terapia , Células-Madre Neurales/trasplante , Viroterapia Oncolítica/métodos , Adenoviridae , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Virus Oncolíticos
7.
Int J Mol Sci ; 22(1)2021 Jan 05.
Artículo en Inglés | MEDLINE | ID: mdl-33466472

RESUMEN

A viral infection that involves virus invasion, protein synthesis, and virion assembly is typically accompanied by sharp fluctuations in the intracellular levels of metabolites. Under certain conditions, dramatic metabolic shifts can result in various types of cell death. Here, we review different types of adenovirus-induced cell death associated with changes in metabolic profiles of the infected cells. As evidenced by experimental data, in most cases changes in the metabolome precede cell death rather than represent its consequence. In our previous study, the induction of autophagic cell death was observed following adenovirus-mediated lactate production, acetyl-CoA accumulation, and ATP release, while apoptosis was demonstrated to be modulated by alterations in acetate and asparagine metabolism. On the other hand, adenovirus-induced ROS production and ATP depletion were demonstrated to play a significant role in the process of necrotic cell death. Interestingly, the accumulation of ceramide compounds was found to contribute to the induction of all the three types of cell death mentioned above. Eventually, the characterization of metabolite analysis could help in uncovering the molecular mechanism of adenovirus-mediated cell death induction and contribute to the development of efficacious oncolytic adenoviral vectors.


Asunto(s)
Adenoviridae/genética , Adenoviridae/fisiología , Muerte Celular/genética , Muerte Celular/fisiología , Metaboloma/genética , Metaboloma/fisiología , Apoptosis/genética , Apoptosis/fisiología , Vectores Genéticos/genética , Vectores Genéticos/fisiología , Humanos
8.
Int J Mol Sci ; 22(3)2021 Jan 28.
Artículo en Inglés | MEDLINE | ID: mdl-33525678

RESUMEN

Autophagy is a process essential for cellular energy consumption, survival, and defense mechanisms. The role of autophagy in several types of human cancers has been explicitly explained; however, the underlying molecular mechanism of autophagy in glioblastoma remains ambiguous. Autophagy is thought to be a "double-edged sword", and its effect on tumorigenesis varies with cell type. On the other hand, autophagy may play a significant role in the resistance mechanisms against various therapies. Therefore, it is of the utmost importance to gain insight into the molecular mechanisms deriving the autophagy-mediated therapeutic resistance and designing improved treatment strategies for glioblastoma. In this review, we discuss autophagy mechanisms, specifically its pro-survival and growth-suppressing mechanisms in glioblastomas. In addition, we try to shed some light on the autophagy-mediated activation of the cellular mechanisms supporting radioresistance and chemoresistance in glioblastoma. This review also highlights autophagy's involvement in glioma stem cell behavior, underlining its role as a potential molecular target for therapeutic interventions.


Asunto(s)
Proteínas Relacionadas con la Autofagia/metabolismo , Neoplasias Encefálicas/metabolismo , Resistencia a Antineoplásicos , Glioblastoma/metabolismo , Tolerancia a Radiación , Antineoplásicos/farmacología , Antineoplásicos/uso terapéutico , Autofagia , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/radioterapia , Regulación Neoplásica de la Expresión Génica/efectos de los fármacos , Regulación Neoplásica de la Expresión Génica/efectos de la radiación , Glioblastoma/tratamiento farmacológico , Glioblastoma/radioterapia , Humanos , Transducción de Señal
9.
Int J Cancer ; 147(7): 1939-1952, 2020 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-32086955

RESUMEN

Combination therapy has become a cornerstone in cancer treatment to potentiate therapeutic effectiveness and overcome drug resistance and metastasis. In this work, we explore combination trials in breast cancer brain metastasis (BCBM), highlighting deficiencies in trial design and underlining promising combination strategies. On October 31, 2019, we examined ClinicalTrials.gov for interventional and therapeutic clinical trials involving combination therapy for BCBM, without limiting for date or location. Information on trial characteristics was collected. Combination therapies used in trials were analyzed and explored in line with evidence from the medical literature. Sixty-five combination therapy trials were selected (n = 65), constituting less than 0.7% of all breast cancer trials. Most trials (62%) combined ≥2 chemotherapeutic agents. Chemotherapy with radiation was main-stay in 23% of trials. Trastuzumab was mostly used in combination (31%), followed by lapatinib (20%) and capecitabine (15%). Common strategies involved combining tyrosine kinase inhibitors with thymidylate synthase inhibitors (6 trials), dual HER-dimerization inhibitors (3 trials), microtubule inhibitors and tyrosine kinase inhibitors (3 trials), and HER-dimerization inhibitors and tyrosine kinase inhibitors (3 trials). The combination of tucatinib and capecitabine yielded the highest objective response rate (83%) in early phase trials. The triple combination of trastuzumab, tucatinib and capecitabine lowered the risk of disease progression or death by 52% in patients with HER2-positive BCBM. Combining therapeutic agents based on biological mechanisms is necessary to increase the effectiveness of available anti-cancer regimens. Significant survival benefit has yet to be achieved in future combination therapy trials. Enhancing drug delivery through blood-brain barrier permeable agents may potentiate the overall therapeutic outcomes.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/secundario , Neoplasias de la Mama/tratamiento farmacológico , Barrera Hematoencefálica , Ensayos Clínicos como Asunto , Sinergismo Farmacológico , Femenino , Humanos , Análisis de Supervivencia , Resultado del Tratamiento
10.
Int J Cancer ; 146(8): 2218-2228, 2020 04 15.
Artículo en Inglés | MEDLINE | ID: mdl-31443114

RESUMEN

Glioblastoma (GBM) is one of the most aggressive primary brain tumors with frequent recurrences following the standard methods of treatment-temozolomide (TMZ), ionizing radiation and surgical resection. The objective of our study was to investigate GBM resistance mediated via MMP14 (matrix metalloproteinase 14). We used multiple PDX GBM models and established glioma cell lines to characterize expression and subcellular localization of MMP14 after TMZ treatment. We performed a Kiloplex ELISA-based array to evaluate changes in cellular proteins induced by MMP14 expression and translocation. Lastly, we conducted functional and mechanistic studies to elucidate the role of DLL4 (delta-like canonical notch ligand 4) in regulation of glioma stemness, particularly in the context of its relationship to MMP14. We detected that TMZ treatment promotes nuclear translocation of MMP14 followed by extracellular release of DLL4. DLL4 in turn stimulates cleavage of Notch3, its nuclear translocation and induction of sphering capacity and stemness.


Asunto(s)
Neoplasias Encefálicas/tratamiento farmacológico , Glioblastoma/tratamiento farmacológico , Péptidos y Proteínas de Señalización Intracelular/metabolismo , Metaloproteinasa 14 de la Matriz/metabolismo , Proteínas de la Membrana/metabolismo , Células Madre Neoplásicas/efectos de los fármacos , Receptor Notch3/metabolismo , Temozolomida/farmacología , Animales , Biomarcadores de Tumor/biosíntesis , Biomarcadores de Tumor/metabolismo , Neoplasias Encefálicas/patología , Línea Celular Tumoral , Resistencia a Antineoplásicos , Proteína 1 de la Respuesta de Crecimiento Precoz/metabolismo , Factores de Crecimiento de Fibroblastos/metabolismo , Glioblastoma/metabolismo , Glioblastoma/patología , Humanos , Metaloproteinasa 14 de la Matriz/biosíntesis , Ratones , Células Madre Neoplásicas/metabolismo , Células Madre Neoplásicas/patología , Transducción de Señal/efectos de los fármacos , Ensayos Antitumor por Modelo de Xenoinjerto
11.
Cancer Metastasis Rev ; 38(3): 493-506, 2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-31705228

RESUMEN

Tumor suppressors are cellular proteins typically expressed in normal (non-cancer) cells that not only regulate such cellular functions as proliferation, migration and adhesion, but can also be secreted into extracellular space and serve as biomarkers for pathological conditions or tumor progression. KISS1, a precursor for several shorter peptides, known as metastin (Kisspeptin-54), Kisspeptin-14, Kisspeptin-13 and Kisspeptin-10, is one of those metastasis suppressor proteins, whose expression is commonly downregulated in the metastatic tumors of various origins. The commonly accepted role of KISS1 in metastatic tumor progression mechanism is the ability of this protein to suppress colonization of disseminated cancer cells in distant organs critical for the formation of the secondary tumor foci. Besides, recent evidence suggests involvement of KISS1 in the mechanisms of tumor angiogenesis, autophagy and apoptosis regulation, suggesting a possible role in both restricting and promoting cancer cell invasion. Here, we discuss the role of KISS1 in regulating metastases, the link between KISS1 expression and the autophagy-related biology of cancer cells and the perspectives of using KISS1 as a potential diagnostic marker for cancer progression as well as a new anti-cancer therapeutics.


Asunto(s)
Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Kisspeptinas/metabolismo , Animales , Autofagia/fisiología , Biomarcadores de Tumor/metabolismo , Femenino , Humanos
12.
Biochim Biophys Acta Rev Cancer ; 1868(1): 273-276, 2017 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-28554666

RESUMEN

The presence of human cytomegalovirus (HCMV) and glioblastoma multiforme (GBM), first established in 2002, has developed into an area of considerable interest and controversy. Numerous studies have found evidence of possible HCMV infection of GBM tumor cells as well as myriad onco- and immunomodulatory properties exhibited by HCMV antigens and transcripts, while recent reports have failed to detect HCMV particles in GBM and question the virus' role in tumor progression. This review highlights the known immunomodulatory properties of HCMV, independent of GBM infection status, that help drive the virus from peripheral blood into the vital tissues and subsequently dampen local immune response, assisting GBM tumors in evading immune surveillance and contributing to the disease's poor prognosis. Emerging antiviral approaches to treating GBM, including antiviral drugs and immunotherapies directed against HCMV, are also examined.


Asunto(s)
Neoplasias Encefálicas/inmunología , Neoplasias Encefálicas/patología , Citomegalovirus/inmunología , Glioblastoma/inmunología , Glioblastoma/patología , Inmunomodulación/inmunología , Neoplasias Encefálicas/virología , Infecciones por Citomegalovirus/inmunología , Infecciones por Citomegalovirus/patología , Infecciones por Citomegalovirus/virología , Progresión de la Enfermedad , Glioblastoma/virología , Humanos
13.
J Neurooncol ; 140(2): 237-248, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30094720

RESUMEN

BACKGROUND: Macroautophagy/autophagy is considered to play key roles in tumor cell evasion of therapy and establishment of metastases in breast cancer. High expression of LC3, a residual autophagy marker, in primary breast tumors has been associated with metastatic disease and poor outcome. FIP200/Atg17, a multi-functional pro-survival molecule required for autophagy, has been implicated in brain metastases in experimental models. However, expression of these proteins has not been examined in brain metastases from patients with breast cancer. METHODS: In this retrospective study, specimens from 44 patients with brain metastases of infiltrating ductal carcinoma of the breast (IDC), unpaired samples from 52 patients with primary IDC (primary-BC) and 16 matched-paired samples were analyzed for LC3 puncta, expression of FIP200/Atg17, and p62 staining. RESULTS: LC3-puncta+ tumor cells and FIP200/Atg17 expression were detected in greater than 90% of brain metastases but there were considerable intra- and inter-tumor differences in expression levels. High numbers of LC3-puncta+ tumor cells in brain metastases correlated with a significantly shorter survival time in triple-negative breast cancer. FIP200/Atg17 protein levels were significantly higher in metastases that subsequently recurred following therapy. The percentages of LC3 puncta+ tumor cells and FIP200/Atg17 protein expression levels, but not mRNA levels, were significantly higher in metastases than primary-BC. Meta-analysis of gene expression datasets revealed a significant correlation between higher FIP200(RB1CC1)/Atg17 mRNA levels in primary-BC tumors and shorter disease-free survival. CONCLUSIONS: These results support assessments of precision medicine-guided targeting of autophagy in treatment of brain metastases in breast cancer patients.


Asunto(s)
Neoplasias Encefálicas/metabolismo , Neoplasias Encefálicas/secundario , Neoplasias de la Mama/patología , Carcinoma Ductal de Mama/patología , Proteínas Asociadas a Microtúbulos/metabolismo , Proteínas Tirosina Quinasas/metabolismo , Adulto , Anciano , Proteínas Relacionadas con la Autofagia , Biomarcadores de Tumor/metabolismo , Encéfalo/metabolismo , Encéfalo/patología , Neoplasias Encefálicas/mortalidad , Neoplasias Encefálicas/terapia , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/mortalidad , Neoplasias de la Mama/terapia , Carcinoma Ductal de Mama/metabolismo , Carcinoma Ductal de Mama/mortalidad , Carcinoma Ductal de Mama/terapia , Femenino , Regulación Neoplásica de la Expresión Génica , Humanos , Metaanálisis como Asunto , Persona de Mediana Edad , ARN Mensajero/metabolismo , Estudios Retrospectivos
14.
Stem Cells ; 34(9): 2276-89, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27354342

RESUMEN

Glioblastoma multiforme (GBM) is the most common and lethal adult brain tumor. Resistance to standard radiation and chemotherapy is thought to involve survival of GBM cancer stem cells (CSCs). To date, no single marker for identifying GBM CSCs has been able to capture the diversity of CSC populations, justifying the needs for additional CSC markers for better characterization. Employing targeted mass spectrometry, here we present five cell-surface markers HMOX1, SLC16A1, CADM1, SCAMP3, and CLCC1 which were found to be elevated in CSCs relative to healthy neural stem cells (NSCs). Transcriptomic analyses of REMBRANDT and TCGA compendiums also indicated elevated expression of these markers in GBM relative to controls and non-GBM diseases. Two markers SLC16A1 and HMOX1 were found to be expressed among pseudopalisading cells that reside in the hypoxic region of GBM, substantiating the histopathological hallmarks of GBM. In a prospective study (N = 8) we confirmed the surface expression of HMOX1 on freshly isolated primary GBM cells (P0). Employing functional assays that are known to evaluate stemness, we demonstrate that elevated HMOX1 expression is associated with stemness in GBM and can be modulated through TGFß. siRNA-mediated silencing of HMOX1 impaired GBM invasion-a phenomenon related to poor prognosis. In addition, surgical resection of GBM tumors caused declines (18% ± 5.1SEM) in the level of plasma HMOX1 as measured by ELISA, in 8/10 GBM patients. These findings indicate that HMOX1 is a robust predictor of GBM CSC stemness and pathogenesis. Further understanding of the role of HMOX1 in GBM may uncover novel therapeutic approaches. Stem Cells 2016;34:2276-2289.


Asunto(s)
Neoplasias Encefálicas/patología , Glioblastoma/patología , Hemo-Oxigenasa 1/metabolismo , Células Madre Neoplásicas/metabolismo , Células Madre Neoplásicas/patología , Factor de Crecimiento Transformador beta/metabolismo , Biomarcadores de Tumor/metabolismo , Neoplasias Encefálicas/metabolismo , Diferenciación Celular , Línea Celular Tumoral , Proliferación Celular , Autorrenovación de las Células , Glioblastoma/metabolismo , Humanos , Proteínas de la Membrana/metabolismo , Transportadores de Ácidos Monocarboxílicos/metabolismo , Invasividad Neoplásica , Células-Madre Neurales/metabolismo , Pronóstico , Esferoides Celulares/metabolismo , Simportadores/metabolismo
15.
J Neurooncol ; 133(2): 257-264, 2017 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28434113

RESUMEN

Electromagnetic fields (EMF) in the radio frequency energy (RFE) range can affect cells at the molecular level. Here we report a technology that can record the specific RFE signal of a given molecule, in this case the siRNA of epidermal growth factor receptor (EGFR). We demonstrate that cells exposed to this EGFR siRNA RFE signal have a 30-70% reduction of EGFR mRNA expression and ~60% reduction in EGFR protein expression vs. control treated cells. Specificity for EGFR siRNA effect was confirmed via RNA microarray and antibody dot blot array. The EGFR siRNA RFE decreased cell viability, as measured by Calcein-AM measures, LDH release and Caspase 3 cleavage, and increased orthotopic xenograft survival. The outcomes of this study demonstrate that an RFE signal can induce a specific siRNA-like effect on cells. This technology opens vast possibilities of targeting a broader range of molecules with applications in medicine, agriculture and other areas.


Asunto(s)
Radiación Electromagnética , Receptores ErbB/metabolismo , Regulación Neoplásica de la Expresión Génica/efectos de la radiación , Glioma/metabolismo , Apoptosis/fisiología , Línea Celular Tumoral , Proliferación Celular/fisiología , Receptores ErbB/genética , Glioma/genética , Humanos , Antígeno Ki-67/metabolismo , Interferencia de ARN/fisiología , ARN Interferente Pequeño/genética , ARN Interferente Pequeño/metabolismo
16.
Biochim Biophys Acta ; 1846(1): 113-20, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24657728

RESUMEN

Glioblastoma is a malignant brain tumor of glial origin. These tumors are thought to be derived from astrocytic cells that undergo malignant transformation. A growing body of evidence suggests that upregulation of MMP expression plays a significant role in promoting glioma pathogenesis. Elevated expression of MMP14 not only promotes glioma invasion and tumor cell proliferation but also plays a role in angiogenesis. Despite the fact that levels of MMP14 correlate with breast cancer progression, the controversial role of MMP14 in gliomagenesis needs to be elucidated. In the present review, we discuss the role of MMP14 in glioma progression as well as the mechanisms of MMP14 regulation in the context of future therapeutic manipulations.


Asunto(s)
Neoplasias Encefálicas/patología , Neoplasias Encefálicas/terapia , Carcinogénesis/genética , Glioblastoma/patología , Glioblastoma/terapia , Metaloproteinasa 14 de la Matriz/fisiología , Animales , Encéfalo/patología , Neoplasias Encefálicas/genética , Carcinogénesis/metabolismo , Glioblastoma/genética , Humanos , Metaloproteinasa 14 de la Matriz/genética , Terapia Molecular Dirigida , Ensayos Antitumor por Modelo de Xenoinjerto
17.
Mol Ther ; 21(11): 2063-73, 2013 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-23883863

RESUMEN

Current research has evaluated the intrinsic tumor-tropic properties of stem cell carriers for targeted anticancer therapy. Our laboratory has been extensively studying in the preclinical setting, the role of neural stem cells (NSCs) as delivery vehicles of CRAd-S-pk7, a gliomatropic oncolytic adenovirus (OV). However, the mediated toxicity of therapeutic payloads, such as oncolytic adenoviruses, toward cell carriers has significantly limited this targeted delivery approach. Following this rationale, in this study, we assessed the role of a novel antioxidant thiol, N-acetylcysteine amide (NACA), to prevent OV-mediated toxicity toward NSC carriers in an orthotropic glioma xenograft mouse model. Our results show that the combination of NACA and CRAd-S-pk7 not only increases the viability of these cell carriers by preventing reactive oxygen species (ROS)-induced apoptosis of NSCs, but also improves the production of viral progeny in HB1.F3.CD NSCs. In an intracranial xenograft mouse model, the combination treatment of NACA and NSCs loaded with CRAd-S-pk7 showed enhanced CRAd-S-pk7 production and distribution in malignant tissues, which improves the therapeutic efficacy of NSC-based targeted antiglioma oncolytic virotherapy. These data demonstrate that the combination of NACA and NSCs loaded with CRAd-S-pk7 may be a desirable strategy to improve the therapeutic efficacy of antiglioma oncolytic virotherapy.


Asunto(s)
Acetilcisteína/análogos & derivados , Adenoviridae/efectos de los fármacos , Glioma/terapia , Células-Madre Neurales/trasplante , Viroterapia Oncolítica/métodos , Acetilcisteína/farmacología , Adenoviridae/genética , Animales , Línea Celular Tumoral , Glioma/patología , Ratones , Ratones Desnudos , Terapia Molecular Dirigida/métodos , Neoplasias Experimentales , Virus Oncolíticos/efectos de los fármacos , Virus Oncolíticos/genética , Replicación Viral , Ensayos Antitumor por Modelo de Xenoinjerto
18.
Discov Med ; 36(180): 22-47, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38273744

RESUMEN

Idiopathic pulmonary fibrosis is a progressive and incurable lung disease characterized by collagen deposition, alveolar inflammation, fibroblast proliferation, and the destruction of lung tissue structures. It is a rare yet severe condition with a high mortality rate, typically leading to death within 3-5 years of diagnosis. The clinical presentation of idiopathic pulmonary fibrosis (IPF) involves a gradual and substantial loss of lung function, ultimately resulting in respiratory failure. Despite more than half a century of intensive research, the origin of IPF remains a mystery. Despite its unknown etiology, several genetic and non-genetic factors have been linked to IPF. Recent significant advancements have been made in the field of IPF diagnosis and treatment. Two oral small-molecule drugs, pirfenidone and nintedanib, have recently gained approval for the treatment of IPF. Pirfenidone exhibits antifibrotic, antioxidant, and anti-inflammatory properties, while nintedanib is a tyrosine kinase inhibitor with selectivity for vascular endothelial growth factor (VEGF) receptors, prostaglandin F (PGF) receptors, and fibroblast growth factor (FGF) receptors. Both of these compounds are capable of slowing down the progression of the disease with an acceptable safety profile. This review provides a brief introduction, historical background, epidemiological insights, and an exploration of various environmental risk factors that may influence the lung microenvironment and contribute to the advancement of IPF. The review also delves into the diagnosis, signaling pathways, and ongoing clinical trials worldwide. A thorough review of the literature was conducted using PubMed and Google Scholar to gather information on various aspects of IPF. Numerous potential drugs are currently under investigation in clinical trials, and the completion of this process is crucial to the ultimate goal of finding a cure for IPF patients. The investigation of the role of genes, surfactant proteins, infectious agents, biomarkers, and epigenetic changes holds the promise of offering earlier and more accurate understanding and diagnosis of IPF. This information could be instrumental in the development of new therapeutic approaches for treating IPF and is expected to be of great interest to researchers.


Asunto(s)
Fibrosis Pulmonar Idiopática , Factor A de Crecimiento Endotelial Vascular , Humanos , Fibrosis Pulmonar Idiopática/diagnóstico , Fibrosis Pulmonar Idiopática/tratamiento farmacológico , Pulmón/metabolismo , Inflamación/tratamiento farmacológico , Inhibidores de Proteínas Quinasas/uso terapéutico , Piridonas/uso terapéutico , Piridonas/farmacología
19.
Cell Biochem Biophys ; 2024 Mar 14.
Artículo en Inglés | MEDLINE | ID: mdl-38483755

RESUMEN

Nucleoside analogs are a common form of chemotherapy that disrupts DNA replication and repair, leading to cell cycle arrest and apoptosis. Reactive oxygen species (ROS) production is a significant mechanism through which these drugs exert their anticancer effects. This study investigated a new nucleoside analog called FNC or Azvudine, and its impact on ROS production and cell viability in Dalton's lymphoma (DL) cells. The study found that FNC treatment resulted in a time- and dose-dependent increase in ROS levels in DL cells. After 15 and 30 min of treatment with 2 and 1 mg/ml of FNC, mitochondrial ROS production was observed in DL cells. Furthermore, prolonged exposure to FNC caused structural alterations and DNA damage in DL cells. The results suggest that FNC's ability to impair DL cell viability may be due to its induction of ROS production and indicate a need for further investigation.

20.
Discov Oncol ; 15(1): 16, 2024 Jan 22.
Artículo en Inglés | MEDLINE | ID: mdl-38252337

RESUMEN

PURPOSE: T-cell lymphomas, refer to a diverse set of lymphomas that originate from T-cells, a type of white blood cell, with limited treatment options. This investigation aimed to assess the efficacy and mechanism of a novel fluorinated nucleoside analogue (FNA), 2'-deoxy-2'-ß-fluoro-4'-azidocytidine (FNC), against T-cell lymphoma using Dalton's lymphoma (DL)-bearing mice as a model. METHODS: Balb/c mice transplanted with the DL tumor model received FNC treatment to study therapeutic efficacy against T-cell lymphoma. Behavioral monitoring, physiological measurements, and various analyses were conducted to evaluate treatment effects for mechanistic investigations. RESULTS: The results of study indicated that FNC prevented DL-altered behavior parameters, weight gain and alteration in organ structure, hematological parameters, and liver enzyme levels. Moreover, FNC treatment restored organ structures, attenuated angiogenesis, reduced DL cell viability and proliferation through apoptosis. The mechanism investigation revealed FNC diminished MMP levels, induced apoptosis through ROS induction, and activated mitochondrial-mediated pathways leading to increase in mean survival time of DL mice. These findings suggest that FNC has potential therapeutic effects in mitigating DL-induced adverse effects. CONCLUSION: FNC represents an efficient and targeted treatment strategy against T-cell lymphoma. FNC's proficient ability to induce apoptosis through ROS generation and MMP reduction makes it a promising candidate for developing newer and more effective anticancer therapies. Continued research could unveil FNC's potential role in designing a better therapeutic approach against NHL.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA