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1.
Blood ; 136(9): 1080-1090, 2020 08 27.
Artículo en Inglés | MEDLINE | ID: mdl-32438400

RESUMEN

Recombinant erythropoietin (EPO) and iron substitution are a standard of care for treatment of anemias associated with chronic inflammation, including anemia of chronic kidney disease. A black box warning for EPO therapy and concerns about negative side effects related to high-dose iron supplementation as well as the significant proportion of patients becoming EPO resistant over time explains the medical need to define novel strategies to ameliorate anemia of chronic disease (ACD). As hepcidin is central to the iron-restrictive phenotype in ACD, therapeutic approaches targeting hepcidin were recently developed. We herein report the therapeutic effects of a fully human anti-BMP6 antibody (KY1070) either as monotherapy or in combination with Darbepoetin alfa on iron metabolism and anemia resolution in 2 different, well-established, and clinically relevant rodent models of ACD. In addition to counteracting hepcidin-driven iron limitation for erythropoiesis, we found that the combination of KY1070 and recombinant human EPO improved the erythroid response compared with either monotherapy in a qualitative and quantitative manner. Consequently, the combination of KY1070 and Darbepoetin alfa resulted in an EPO-sparing effect. Moreover, we found that suppression of hepcidin via KY1070 modulates ferroportin expression on erythroid precursor cells, thereby lowering potentially toxic-free intracellular iron levels and by accelerating erythroid output as reflected by increased maturation of erythrocyte progenitors. In summary, we conclude that treatment of ACD, as a highly complex disease, becomes more effective by a multifactorial therapeutic approach upon mobilization of endogenous iron deposits and stimulation of erythropoiesis.


Asunto(s)
Anemia/terapia , Anticuerpos Monoclonales/uso terapéutico , Proteína Morfogenética Ósea 6/antagonistas & inhibidores , Darbepoetina alfa/uso terapéutico , Anemia/tratamiento farmacológico , Anemia/etiología , Animales , Anticuerpos Monoclonales/administración & dosificación , Anticuerpos Monoclonales/inmunología , Artritis/inducido químicamente , Artritis/complicaciones , Médula Ósea/metabolismo , Proteína Morfogenética Ósea 6/inmunología , Proteínas de Transporte de Catión/metabolismo , Citocinas/sangre , Darbepoetina alfa/administración & dosificación , Relación Dosis-Respuesta a Droga , Sinergismo Farmacológico , Eritropoyetina/farmacología , Eritropoyetina/uso terapéutico , Células Hep G2 , Humanos , Hierro/metabolismo , Ratones , Proteínas Musculares/sangre , Polisacáridos Bacterianos/toxicidad , Distribución Aleatoria , Proteínas Recombinantes/inmunología , Insuficiencia Renal Crónica/complicaciones
2.
Int J Mol Sci ; 22(7)2021 Apr 04.
Artículo en Inglés | MEDLINE | ID: mdl-33916572

RESUMEN

Cold atmospheric plasma (CAP) is partially ionized gas near room temperature with previously reported antitumor effects. Despite extensive research and growing interest in this technology, active components and molecular mechanisms of CAP are not fully understood to date. We used Raman spectroscopy and colorimetric assays to determine elevated nitrite and nitrate levels after treatment with a MiniFlatPlaster CAP device. Previously, we demonstrated CAP-induced acidification. Cellular effects of nitrite and strong extracellular acidification were assessed using live-cell imaging of intracellular Ca2+ levels, cell viability analysis as well as quantification of p21 and DNA damage. We further characterized these observations by analyzing established molecular effects of CAP treatment. A synergistic effect of nitrite and acidification was found, leading to strong cytotoxicity in melanoma cells. Interestingly, protein nitration and membrane damage were absent after treatment with acidified nitrite, thereby challenging their contribution to CAP-induced cytotoxicity. Further, phosphorylation of ERK1/2 was increased after treatment with both acidified nitrite and indirect CAP. This study characterizes the impact of acidified nitrite on melanoma cells and supports the importance of RNS during CAP treatment. Further, it defines and evaluates important molecular mechanisms that are involved in the cancer cell response to CAP.


Asunto(s)
Antineoplásicos/farmacología , Apoptosis/efectos de los fármacos , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Melanoma/tratamiento farmacológico , Nitritos/farmacología , Gases em Plasma/farmacología , Línea Celular Tumoral , Supervivencia Celular/efectos de los fármacos , Daño del ADN , Humanos , Melanoma/metabolismo , Melanoma/patología
3.
Int J Mol Sci ; 22(15)2021 Jul 23.
Artículo en Inglés | MEDLINE | ID: mdl-34360651

RESUMEN

Cold Atmospheric Plasma (CAP) is an ionized gas near room temperature. Its anti-tumor effect can be transmitted either by direct treatment or mediated by a plasma-treated solution (PTS), such as treated standard cell culture medium, which contains different amino acids, inorganic salts, vitamins and other substances. Despite extensive research, the active components in PTS and its molecular or cellular mechanisms are not yet fully understood. The purpose of this study was the measurement of the reactive species in PTS and their effect on tumor cells using different plasma modes and treatment durations. The PTS analysis yielded mode- and dose-dependent differences in the production of reactive oxygen and nitrogen species (RONS), and in the decomposition and modification of the amino acids Tyrosine (Tyr) and Tryptophan (Trp). The Trp metabolites Formylkynurenine (FKyn) and Kynurenine (Kyn) were produced in PTS with the 4 kHz (oxygen) mode, inducing apoptosis in Mel Im melanoma cells. Nitrated derivatives of Trp and Tyr were formed in the 8 kHz (nitrogen) mode, elevating the p16 mRNA expression and senescence-associated ß-Galactosidase staining. In conclusion, the plasma mode has a strong impact on the composition of the active components in PTS and affects its anti-tumor mechanism. These findings are of decisive importance for the development of plasma devices and the effectiveness of tumor treatment.


Asunto(s)
Melanocitos/efectos de los fármacos , Melanoma/tratamiento farmacológico , Gases em Plasma/farmacología , Especies de Nitrógeno Reactivo/metabolismo , Especies Reactivas de Oxígeno/metabolismo , Triptófano/metabolismo , Tirosina/metabolismo , Apoptosis , Células Cultivadas , Inhibidor p16 de la Quinasa Dependiente de Ciclina/genética , Inhibidor p16 de la Quinasa Dependiente de Ciclina/metabolismo , Humanos , Melanocitos/metabolismo , Melanoma/metabolismo , Melanoma/patología , Triptófano/química , Tirosina/química
4.
Exp Dermatol ; 29(12): 1199-1208, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-32592187

RESUMEN

Ultraviolet A1 (UVA1 ) phototherapy (spectral range 340-400 nm) is a well-established treatment option for various skin diseases such as localized scleroderma. Recent improvements of conventional UVA1 light sources (metal-halide or fluorescent lamps) have brought attention to a new light-emitting diode (LED) technology with remarkable advantages in handling and clinical routine. This study provides a preclinical histological and molecular evaluation of an LED-based UVA1 prototype with a narrower spectral range (360-400 nm) for treating localized scleroderma. Scleroderma mouse models and fibroblasts in vitro were exposed to LED-based UVA1 phototherapy or to irradiation with a commercially available metal-halide lamp emitting low-dose (20, 40 J/cm2 ), medium-dose (60 J/cm2 ) and high-dose (80, 100 J/cm2 ) UVA1 light. Both UVA1 light sources affected inflammatory genes (IL-1α and IL-6) and growth factors (TGFß-1 and TGFß-2). Increased collagen type 1 was reduced after UVA1 phototherapy. Matrix metalloproteinase-1 was more enhanced after a medium dose of LED-based UVA1 phototherapy than after conventional treatment. In vivo, dermal thickness and the amount of collagen were reduced after both treatment methods. Remarkably, myofibroblasts were more effectively reduced by a medium dose of LED-based UVA1 phototherapy. The study indicates that LED-based UVA1 phototherapy yields similar or even better results than conventional treatment. In terms of biosafety and patient comfort, LED-based UVA1 phototherapy offers clear advantages over conventional treatment because of the use of a narrower and less harmful UVA1 spectrum, less heat generation and shorter treatment times at the same irradiation intensity. Clinical studies are required to confirm these results in patients with localized scleroderma.


Asunto(s)
Fibroblastos/efectos de la radiación , Expresión Génica/efectos de la radiación , Esclerodermia Localizada/radioterapia , Terapia Ultravioleta/instrumentación , Actinas/metabolismo , Animales , Bleomicina , Supervivencia Celular/efectos de la radiación , Células Cultivadas , Colágeno Tipo I/genética , Colágeno Tipo I/metabolismo , Modelos Animales de Enfermedad , Fibroblastos/patología , Fibroblastos/fisiología , Humanos , Interleucina-1alfa/genética , Interleucina-6/genética , Masculino , Metaloproteinasa 1 de la Matriz/genética , Metaloproteinasa 1 de la Matriz/metabolismo , Ratones , Miofibroblastos/metabolismo , ARN Mensajero/metabolismo , Esclerodermia Localizada/inducido químicamente , Esclerodermia Localizada/patología , Factor de Crecimiento Transformador beta1/genética , Factor de Crecimiento Transformador beta2/genética , Rayos Ultravioleta
5.
Biol Chem ; 400(1): 111-122, 2018 12 19.
Artículo en Inglés | MEDLINE | ID: mdl-29908123

RESUMEN

Plasma oncology is a relatively new field of research. Recent developments have indicated that cold atmospheric plasma (CAP) technology is an interesting new therapeutic approach to cancer treatment. In this study, p53 wildtype (LoVo) and human p53 mutated (HT29 and SW480) colorectal cancer cells were treated with the miniFlatPlaSter - a device particularly developed for the treatment of tumor cells - that uses the Surface Micro Discharge (SMD) technology for plasma production in air. The present study analyzed the effects of plasma on colorectal cancer cells in vitro and on normal colon tissue ex vivo. Plasma treatment had strong effects on colon cancer cells, such as inhibition of cell proliferation, induction of cell death and modulation of p21 expression. In contrast, CAP treatment of murine colon tissue ex vivo for up to 2 min did not show any toxic effect on normal colon cells compared to H2O2 positive control. In summary, these results suggest that the miniFlatPlaSter plasma device is able to kill colorectal cancer cells independent of their p53 mutation status. Thus, this device presents a promising new approach in colon cancer therapy.


Asunto(s)
Presión Atmosférica , Proliferación Celular/efectos de los fármacos , Neoplasias Colorrectales/patología , Gases em Plasma/farmacología , Animales , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Neoplasias Colorrectales/genética , Daño del ADN , Genes p53 , Humanos , Ratones , Proteína Oncogénica p21(ras)/genética , Proteína Oncogénica p21(ras)/metabolismo , ARN Mensajero/metabolismo
6.
Gut ; 64(6): 973-81, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25011936

RESUMEN

OBJECTIVE: Bone morphogenetic protein 6 (BMP6) has been identified as crucial regulator of iron homeostasis. However, its further role in liver pathology including non-alcoholic fatty liver disease (NAFLD) and its advanced form non-alcoholic steatohepatitis (NASH) is elusive. The aim of this study was to investigate the expression and function of BMP6 in chronic liver disease. DESIGN: BMP6 was analysed in hepatic samples from murine models of chronic liver injury and patients with chronic liver diseases. Furthermore, a tissue microarray comprising 110 human liver tissues with different degree of steatosis and inflammation was assessed. BMP6-deficient (BMP6(-/-)) and wild-type mice were compared in two dietary NASH-models, that is, methionine choline-deficient (MCD) and high-fat (HF) diets. RESULTS: BMP6 was solely upregulated in NAFLD but not in other murine liver injury models or diseased human livers. In NAFLD, BMP6 expression correlated with hepatic steatosis but not with inflammation or hepatocellular damage. Also, in vitro cellular lipid accumulation in primary human hepatocytes induced increased BMP6 expression. MCD and HF diets caused more hepatic inflammation and fibrosis in BMP6(-/-) compared with wild-type mice. However, only in the MCD and not in the HF diet model BMP6(-/-) mice developed marked hepatic iron overload, suggesting that further mechanisms are responsible for protective BMP6 effect. In vitro analysis revealed that recombinant BMP6 inhibited the activation of hepatic stellate cells (HSCs) and reduced proinflammatory and profibrogenic gene expression in already activated HSCs. CONCLUSIONS: Steatosis-induced upregulation of BMP6 in NAFLD is hepatoprotective. Induction of BMP6-signalling may be a promising antifibrogenic strategy.


Asunto(s)
Proteína Morfogenética Ósea 6/metabolismo , Fibrosis/metabolismo , Fibrosis/prevención & control , Hígado/patología , Enfermedad del Hígado Graso no Alcohólico/complicaciones , Enfermedad del Hígado Graso no Alcohólico/metabolismo , Sustancias Protectoras/metabolismo , Animales , Proteína Morfogenética Ósea 6/deficiencia , Células Cultivadas , Modelos Animales de Enfermedad , Progresión de la Enfermedad , Fibrosis/etiología , Células Estrelladas Hepáticas/metabolismo , Hepatitis B Crónica/metabolismo , Hepatitis C Crónica/metabolismo , Humanos , Hierro/análisis , Hígado/química , Cirrosis Hepática Alcohólica/metabolismo , Proteínas de la Membrana , Ratones , Triglicéridos/análisis
7.
Psychooncology ; 23(1): 1-8, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-23839818

RESUMEN

BACKGROUND: The potentially detrimental effects of cancer and related treatments on cognitive functioning have emerged as one of the key foci of cancer survivorship research, but little is known about how psychological variables other than depression influence these relationships. To illustrate the potential of social psychological perspectives, we examine how a self-regulatory analysis and specific self-regulatory challenges of contending with cancer-related expectancies and stereotypes provide conceptual frameworks for understanding some of the potential causes and consequences of cancer-related cognitive deficits. METHODS: Literatures on cancer-related cognitive deficits, self-regulatory ego depletion, expectancy stereotypes, and their points of convergence are briefly reviewed. RESULTS: A review and conceptual integration of relevant literatures suggest that coping with cancer can impair self-regulatory capacity. There is an overlap between cognitive deficits associated with self-regulatory challenge and with cancer and its treatment, and restoring self-regulatory resources can attenuate cancer-related cognitive deficits. Examination of specific regulatory challenges of contending with expectancies and stereotypes related to treatment suggests insights that can inform when and among whom cognitive deficits may most likely emerge. CONCLUSIONS: Integrating social psychological ideas with a substantial knowledge base can illustrate novel research trajectories that can deepen our understanding of cancer-related cognitive deficits and their impact on psychosocial well-being.


Asunto(s)
Trastornos del Conocimiento/etiología , Neoplasias/psicología , Autoeficacia , Cognición , Función Ejecutiva , Humanos , Neoplasias/complicaciones , Estereotipo
8.
Exp Dermatol ; 22(4): 284-9, 2013 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-23528215

RESUMEN

Over the past few years, the application of cold atmospheric plasma (CAP) in medicine has developed into an innovative field of research of rapidly growing importance. One promising new medical application of CAP is cancer treatment. Different studies revealed that CAP may potentially affect the cell cycle and cause cell apoptosis or necrosis in tumor cells dependent on the CAP device and doses. In this study, we used a novel hand-held and battery-operated CAP device utilizing the surface micro discharge (SMD) technology for plasma production in air and consequently analysed dose-dependent CAP treatment effects on melanoma cells. After 2 min of CAP treatment, we observed irreversible cell inactivation. Phospho-H2AX immunofluorescence staining and Flow cytometric analysis demonstrated that 2 min of CAP treatment induces DNA damage, promotes induction of Sub-G1 phase and strongly increases apoptosis. Further, protein array technology revealed induction of pro-apoptotic events like p53 and Rad17 phosphorylation of Cytochrome c release and activation of Caspase-3. Interestingly, using lower CAP doses with 1 min of treatment, almost no apoptosis was observed but long-term inhibition of proliferation. H3K9 immunofluorescence, SA-ß-Gal staining and p21 expression revealed that especially these low CAP doses induce senescence in melanoma cells. In summary, we observed differences in induction of apoptosis or senescence of tumor cells in respond to different CAP doses using a new CAP device. The mechanism of senescence with regard to plasma therapy was so far not described previously and is of great importance for therapeutic application of CAP.


Asunto(s)
Melanoma/terapia , Gases em Plasma/uso terapéutico , Neoplasias Cutáneas/terapia , Apoptosis , Línea Celular Tumoral , Fragmentación del ADN , Diseño de Equipo , Puntos de Control de la Fase G1 del Ciclo Celular , Humanos , Melanoma/metabolismo , Melanoma/patología , Neoplasias Cutáneas/metabolismo , Neoplasias Cutáneas/patología
9.
Cancers (Basel) ; 15(4)2023 Feb 07.
Artículo en Inglés | MEDLINE | ID: mdl-36831408

RESUMEN

Cold atmospheric plasma (CAP) describes a partially ionized gas carrying large amounts of reactive oxygen (ROS) and nitrogen species (RNS). Numerous studies reported strong antitumor activity of CAP, thus rendering it a promising approach for tumor therapy. Although several cellular mechanisms of its cytotoxicity were identified in recent years, the exact molecular effects and contributing signaling pathways are yet to be discovered. We discovered a strong activation of unfolded protein response (UPR) after CAP treatment with increased C/EBP homologous protein (CHOP) expression, which was mainly caused by protein misfolding and calcium loss in the endoplasmic reticulum. In addition, both ceramide level and ceramide metabolism were reduced after CAP treatment, which was then linked to the UPR activation. Pharmacological inhibition of ceramide metabolism resulted in sensitization of melanoma cells for CAP both in vitro and ex vivo. This study identified a novel mechanism of CAP-induced apoptosis in melanoma cells and thereby contributes to its potential application in tumor therapy.

10.
Am J Pathol ; 178(6): 2622-31, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21641385

RESUMEN

Dermal wound healing depends on highly complex interplay among various cytokines and cell types. Disruption of this process can result in impaired healing in the form of excessive scarring, as is the case in fibrotic diseases such as keloid and scleroderma. In the present study, we found Fussel-15, a new member of the Ski/Sno family of TGF-ß/BMP signaling repressors, to be expressed in early wound healing and constantly overexpressed in keloid-derived and scleroderma-derived fibroblasts. Comparing the results of three-dimensional free-floating and attached-released in vitro wound healing assays, we observed that Fussel-15 is expressed during the migratory phase in the free-floating assay, indicating that Fussel-15 might play a role during fibroblast migration. Fussel-15-transfected fibroblasts showed greater migration ability in a scratch wound healing assay, compared with control-transfected cells. This migratory phenotype due to Fussel-15 was confirmed by increased peripheral F-actin localization and modifications in size, amount, and distribution of focal adhesion complexes, which were observed using F-actin and focal adhesion kinase (FAK) immunofluorescence staining, respectively. The present results suggest that expression of Fussel-15 during wound healing might promote fibroblast migration. Permanent expression of Fussel-15 in keloid and skin sclerosis fibroblasts could be involved in the pathogenesis of these conditions, but the molecular mechanism underlying this up-regulation remains to be determined.


Asunto(s)
Queloide/metabolismo , Queloide/patología , Proteínas Represoras/metabolismo , Esclerodermia Localizada/metabolismo , Esclerodermia Localizada/patología , Cicatrización de Heridas , Actinas/metabolismo , Bioensayo , Adhesión Celular/efectos de los fármacos , Línea Celular , Movimiento Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Proteínas Co-Represoras , Colágeno/metabolismo , Dermis/efectos de los fármacos , Dermis/metabolismo , Dermis/patología , Matriz Extracelular/efectos de los fármacos , Matriz Extracelular/metabolismo , Fibroblastos/efectos de los fármacos , Fibroblastos/metabolismo , Fibroblastos/patología , Adhesiones Focales/efectos de los fármacos , Regulación de la Expresión Génica/efectos de los fármacos , Humanos , Transporte de Proteínas/efectos de los fármacos , Proteínas Represoras/genética , Factor de Crecimiento Transformador beta/metabolismo , Cicatrización de Heridas/efectos de los fármacos
11.
J Psychosoc Oncol ; 30(1): 128-39, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22269079

RESUMEN

This study examined how breast cancer diagnosis influences underlying cognitions and explicit worries about death, and their roles in health-related quality of life (QOL). Forty-two women who underwent surgery for the removal of either a cancerous or benign breast mass indicated their worries about dying and completed measures of death-thought accessibility and QOL. Women with cancer reported lowered physical, emotional, and functional well-being. Further, although they did not differ in explicit worry about death, women with cancer (compared to those with a benign mass) evidenced greater death-thought accessibility, which in turn mediated the effect of cancer diagnosis on well-being.


Asunto(s)
Actitud Frente a la Muerte , Neoplasias de la Mama/psicología , Cognición , Calidad de Vida/psicología , Adulto , Anciano , Mama/cirugía , Neoplasias de la Mama/patología , Neoplasias de la Mama/cirugía , Femenino , Humanos , Persona de Mediana Edad
12.
J Clin Psychol Med Settings ; 19(2): 127-37, 2012 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-22231422

RESUMEN

Research on neuropsychological difficulties among cancer patients has focused on chemotherapy as a primary cause, yet several studies have now shown that some patients evidence cognitive weaknesses prior to chemotherapy. As an alternative to the 'chemo-brain' theory, this study examined the hypothesis that stress and coping style may be associated with observed neuropsychological difficulties among female cancer patients. Thirty-six women completed neuropsychological testing and psychological questionnaires following surgery for breast cancer and prior to any subsequent treatments. Twenty-seven percent of participants evidenced deficits on at least one measure of verbal fluency, and 14% of participants were impaired on at least one memory measure. Self-reported stress was correlated with deficits in memory, verbal fluency, and attention. Subsequent mediational analyses indicated that use of passive coping styles may underlie this relationship between stress and neuropsychological deficits. These findings highlight the potential relevance of psychological mechanisms, such as coping style, in cancer patients' experience of neuropsychological deficits.


Asunto(s)
Neoplasias de la Mama/psicología , Trastornos del Conocimiento/etiología , Estrés Psicológico/complicaciones , Adaptación Psicológica , Adulto , Anciano , Anciano de 80 o más Años , Atención , Neoplasias de la Mama/cirugía , Trastornos del Conocimiento/psicología , Función Ejecutiva , Femenino , Humanos , Trastornos de la Memoria/etiología , Persona de Mediana Edad , Estrés Psicológico/psicología
13.
Mil Med ; 187(11-12): 308-310, 2022 10 29.
Artículo en Inglés | MEDLINE | ID: mdl-35779046

RESUMEN

The Defense Health Board conducted a year-long examination of mental health accession screening and related issues. In its August 2020 report, Examination of Mental Health Accession Screening: Predictive Value of Current Measures and Processes, the Board recommends a paradigm shift in how mental health impacts on readiness are understood and addressed. This shift can only occur with the development and implementation of a research plan that follows cohorts of military personnel from recruitment through their military career. The following article describes this research plan as an excerpt of the larger report.


Asunto(s)
Personal Militar , Humanos , Personal Militar/psicología , Salud Mental , Ocupaciones , Tamizaje Masivo
14.
Lab Invest ; 91(11): 1615-23, 2011 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21863061

RESUMEN

Recently, we revealed that bone morphogenetic protein (BMP) 4 is increased in hepatocellular carcinoma (HCC). Furthermore, latest reports described BMPs, in particular BMP6, as important regulators of hepcidin expression in iron homeostasis. Therefore, we aimed to unravel why enhanced BMP expression in HCC patients does not lead to severe changes in iron metabolism. Initial analysis of the BMP4 and BMP6 expression patterns revealed enhanced expression on mRNA and protein level in HCC cell lines and tissue samples compared with primary human hepatocytes (PHHs) and normal liver tissues. However and interestingly, hepcidin expression was reduced in HCC cell lines and tissues. Analysis of BMP6 receptor expression revealed loss of BMP6-specific receptor subunit in HCC. To identify a possible regulatory mechanism causing lack of reaction to BMP4 we analyzed the expression of hemojuvelin (HJV), which is involved in iron metabolism as BMP co-receptor. HJV expression was markedly decreased in HCC cell lines and tissues. HJV promoter analysis revealed potential HNF-1α and snail-binding sites, but functional analysis ruled out that these transcriptional regulators or promoter methylation are the cause of HJV downregulation in HCC. However, we identified AU-rich elements in the HJV 3'-untranslated region and revealed significantly faster decay of HJV mRNA in HCC cells as compared with PHH indicating decreased mRNA-stability as the reason for the loss of HJV expression in HCC.


Asunto(s)
Péptidos Catiónicos Antimicrobianos/metabolismo , Proteínas Morfogenéticas Óseas/metabolismo , Carcinoma Hepatocelular/metabolismo , Proteínas Ligadas a GPI/metabolismo , Hierro/metabolismo , Neoplasias Hepáticas/metabolismo , Western Blotting , Línea Celular Tumoral , Cartilla de ADN/genética , Ensayo de Inmunoadsorción Enzimática , Proteínas Ligadas a GPI/genética , Proteína de la Hemocromatosis , Hepcidinas , Humanos , Inmunohistoquímica , Regiones Promotoras Genéticas/genética , Reacción en Cadena en Tiempo Real de la Polimerasa , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Transfección
15.
Gastroenterology ; 138(1): 372-82, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19786029

RESUMEN

BACKGROUND & AIMS: Recent studies identified bone morphogenic protein 6 (BMP6) as a key regulator of hepatic hepcidin expression and iron metabolism, but the cellular source of BMP6 and the reason for its specific effect on hepatocytes are unknown. METHODS: BMP and hepcidin expression upon iron sensing were analyzed in vivo in BMP6(-/-) and BMP6(+/+) mice and ex vivo in tissue and in vitro in cells of the liver and the small intestine. RESULTS: BMP6(-/-) mice developed severe hepatic iron accumulation and reduced hepcidin expression with increasing age. This phenotype could be triggered in younger BMP6(-/-) mice by dietary or parenteral iron application. Furthermore, both treatments induced a marked up-regulation of BMP6 expression in the small intestine of BMP6(+/+) mice. Ex vivo treatment of intestinal tissue of BMP6(+/+) mice with iron sulfate or holo-transferrin confirmed epithelial cells as an inducible source of BMP6. In contrast, iron overload did not promote a striking induction of BMP6 expression in hepatocytes or macrophages. Furthermore, iron-supplemented diet induced a compensatory up-regulation of BMP2, BMP4, and BMP9 in the small intestine of BMP6(-/-) mice that was apparently not sufficient to assure iron homeostasis. As a potential explanation, analysis of hepatocytes revealed an expression pattern of BMP receptor subunits preferentially used by BMP6, and treatment of hepatocytes with different recombinant BMPs identified BMP6 as the most potent stimulator of hepcidin expression. CONCLUSIONS: Epithelial cells of the small intestine are the predominant cellular source of BMP6 upon iron sensing. Our findings reveal a previously unknown mechanism in which the small intestine controls iron homeostasis.


Asunto(s)
Péptidos Catiónicos Antimicrobianos/metabolismo , Proteína Morfogenética Ósea 6/genética , Proteína Morfogenética Ósea 6/metabolismo , Células Epiteliales/fisiología , Hepatocitos/fisiología , Sobrecarga de Hierro/metabolismo , Hierro de la Dieta/metabolismo , Factores de Edad , Alimentación Animal , Animales , Proteína Morfogenética Ósea 4/metabolismo , Células Cultivadas , Células Epiteliales/efectos de los fármacos , Femenino , Factor 2 de Diferenciación de Crecimiento/metabolismo , Hematínicos/farmacología , Hepatocitos/efectos de los fármacos , Hepcidinas , Homeostasis/fisiología , Intestinos/citología , Hierro de la Dieta/farmacología , Complejo Hierro-Dextran/farmacología , Masculino , Ratones , Ratones Endogámicos , Ratones Mutantes , Fenotipo , Regulación hacia Arriba/fisiología
16.
Appl Neuropsychol ; 18(4): 291-7, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-22074068

RESUMEN

In an effort to identify four-subtest Wechsler Adult Intelligence Scale-Third Edition (WAIS-III) short forms valid for estimating Full-Scale IQ (FSIQ) among individuals with traumatic brain injury (TBI), seven tetrad versions of the WAIS-III were evaluated in a convenience sample of patients referred for neuropsychological assessment (n = 176). Estimated FSIQ scores were compared to actual FSIQ scores via correlation analyses, repeated-measures analyses of variance (ANOVAs), and frequency analyses. All short form-estimated FSIQ scores correlated highly with actual scores (all rs > .91, ps < .001). Repeated-measures ANOVAs identified no significant differences between actual and short form-estimated FSIQ scores for two of the seven short forms. These same two short forms had the highest percentage of scores within ±5 points of actual FSIQ scores (75.6% and 71.6%). Thus, two tetrad versions were consistently superior to others in accuracy of estimating FSIQ; these may be helpful when time constraints or other issues necessitate use of an abbreviated battery for estimating FSIQ among individuals with TBI.


Asunto(s)
Lesiones Encefálicas/diagnóstico , Lesiones Encefálicas/psicología , Escalas de Wechsler/estadística & datos numéricos , Adulto , Análisis de Varianza , Femenino , Humanos , Masculino
17.
Biomedicines ; 9(11)2021 Oct 26.
Artículo en Inglés | MEDLINE | ID: mdl-34829774

RESUMEN

Cold Atmospheric Plasma (CAP) has shown promising results in the treatment of various skin diseases. The therapeutic effect of CAP on localized scleroderma (LS), however, has not yet been evaluated. We investigated the effects of CAP on LS by comparing human normal fibroblasts (hNF), human TGF-ß-activated fibroblasts (hAF), and human localized scleroderma-derived fibroblasts (hLSF) after direct CAP treatment, co-cultured with plasma-treated human epidermal keratinocytes (hEK) and with an experimental murine model of scleroderma. In hAF and hLSF, 2 min CAP treatment with the MicroPlaSterß® plasma torch did not affect pro-fibrotic gene expression of alpha smooth muscle actin, fibroblast activating protein, and collagen type I, however, it promoted re-expression of matrix metalloproteinase 1. Functionally, CAP treatment reduced cell migration and stress fiber formation in hAF and hLSF. The relevance of CAP treatment was confirmed in an in vivo model of bleomycin-induced dermal fibrosis. In this model, CAP-treated mice showed significantly reduced dermal thickness and collagen deposition as well as a decrease in both alpha smooth muscle actin-positive myofibroblasts and CD68-positive macrophages in the affected skin in comparison to untreated fibrotic tissue. In conclusion, this study provides the first evidence for the successful use of CAP for treating LS and may be the basis for clinical trials including patients with LS.

18.
Biomolecules ; 11(6)2021 06 17.
Artículo en Inglés | MEDLINE | ID: mdl-34204360

RESUMEN

Cold atmospheric plasma (CAP) reduces bacteria and interacts with tissues and cells, thus improving wound healing. The CAP-related induction of neutrophils was recently described in stained sections of wound tissue in mice. Consequently, this study aimed to examine the functionality of human polymorphonuclear cells (PMN)/granulocytes through either a plasma-treated solution (PTS) or the direct CAP treatment with different plasma modes and treatment durations. PTS analysis yielded mode-dependent differences in the production of reactive oxygen species (ROS) and reactive nitrogen species (RNS) after CAP treatment. Live-cell imaging did not show any chemo-attractive or NETosis-inducing effect on PMNs treated with PTS. The time to maximum ROS production (TmaxROS) in PMNs was reduced by PTS and direct CAP treatment. PMNs directly treated with CAP showed an altered cell migration dependent on the treatment duration as well as decreased TmaxROS without inducing apoptosis. Additionally, flow cytometry showed enhanced integrin and selectin expression, as a marker of activation, on PMN surfaces. In conclusion, the modification of PMN immunoreactivity may be a main supporting mechanism for CAP-induced improvement in wound healing.


Asunto(s)
Granulocitos/inmunología , Integrinas/inmunología , Gases em Plasma/farmacología , Especies de Nitrógeno Reactivo/inmunología , Especies Reactivas de Oxígeno/inmunología , Selectinas/inmunología , Apoptosis/efectos de los fármacos , Regulación de la Expresión Génica/efectos de los fármacos , Regulación de la Expresión Génica/inmunología , Granulocitos/citología , Humanos
19.
Psychooncology ; 19(5): 535-44, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-19472296

RESUMEN

OBJECTIVE: Research has documented modest cognitive difficulties among women treated for breast cancer. The present study was designed to evaluate the effects of these subtle cognitive changes on quality of life after treatment. METHODS: Data are presented from women breast cancer patients who completed neuropsychological tests and questionnaires regarding quality of life 6 and 12 months post-chemotherapy (n's=39 and 33). Neuropsychological test scores were examined for evidence of cognitive difficulties at each time point; repeated measures ANOVAs were used to identify changes over time. Regression analyses assessed relationships of quality of life outcomes with cognitive functioning, social support seeking, and fatigue. RESULTS: Small percentages of participants (<20% across tests) evidenced deficits in delayed memory, processing speed, response inhibition, and verbal fluency (VF) at each time point. Reliable change index analyses suggested statistically reliable improvements in each cognitive domain for a modest portion of participants. Regressions revealed hesitation to seek social support and fatigue as the most consistent predictors of quality of life at 6 and 12 months post-chemotherapy. Cognitive complaints and VF difficulties were also significantly related to quality of life at 12 months. CONCLUSIONS: In addition to confirming the importance of fatigue and social support in quality of life, these data offer preliminary indications that weaker VF skills and self-reported cognitive complaints may be associated with poorer functional outcomes among cancer survivors. Further research is needed to validate these potential relationships, which suggest that cognitive difficulties among cancer survivors may warrant monitoring and possible intervention.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/epidemiología , Trastornos del Conocimiento/diagnóstico , Trastornos del Conocimiento/epidemiología , Calidad de Vida/psicología , Adulto , Femenino , Humanos , Pruebas Neuropsicológicas , Índice de Severidad de la Enfermedad , Encuestas y Cuestionarios , Factores de Tiempo , Resultado del Tratamiento
20.
J Head Trauma Rehabil ; 25(2): 137-44, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20234228

RESUMEN

Legislative advocacy is a prerequisite for the development of research and community services benefiting individuals with traumatic brain injury (TBI). Dr Mitchell Rosenthal and other leaders in rehabilitation began the process of advocating for TBI services more than 25 years ago, before many in the field fully appreciated the necessity of these efforts. Since that time, substantial gains have been made through advocacy efforts on behalf of individuals with TBI and their families. This article provides an overview of the TBI advocacy movement, highlighting federal legislation resulting in appropriations for TBI services and protecting the rights of individuals with TBI. Key government entities engaged in developing states' TBI infrastructure and providing services to individuals with TBI and their families are also discussed. In addition to celebrating some of the successes that were initiated by the efforts of Dr Rosenthal and other visionaries, select shortcoming of current legislation is noted to provide insights regarding future advocacy needs.


Asunto(s)
Lesiones Encefálicas/rehabilitación , Política de Salud/legislación & jurisprudencia , Defensa del Paciente/legislación & jurisprudencia , Lesiones Encefálicas/prevención & control , Continuidad de la Atención al Paciente/economía , Continuidad de la Atención al Paciente/legislación & jurisprudencia , Política de Salud/economía , Accesibilidad a los Servicios de Salud/economía , Accesibilidad a los Servicios de Salud/legislación & jurisprudencia , Humanos , Medicaid/economía , Medicare/economía , Estados Unidos , United States Department of Veterans Affairs/economía , United States Department of Veterans Affairs/legislación & jurisprudencia
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