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1.
Medicina (Kaunas) ; 59(1)2023 Jan 10.
Artículo en Inglés | MEDLINE | ID: mdl-36676765

RESUMEN

Diabetes mellitus (DM) has a growing prevalence worldwide, even in developing countries. Many antidiabetic agents are used to improve glycemic control; however, in cases of an insufficient outcome, insulin is administered. Yet, the timing of proper insulin administration is still a subject of intense research. To date, there have been no recommendations or guidelines for the use of continuous subcutaneous insulin infusion (CSII) in Type 2 Diabetes Mellitus (T2DM). In the present study, we have performed a meta-analysis to evaluate the use of CSII in patients with T2DM. An extensive literature search was conducted through the electronic databases Pubmed, Clinicaltrials.gov, and Cochrane Central Register of Controlled Trials (CENTRAL) from October 2019-May 2022, for interventional studies related to T2DMI and CSII versus multiple daily injections (MDI). We included articles published in the English language only, yielding a total of thirteen studies. We found better outcomes in patients receiving CSII, in regard to glycated hemoglobin (HbA1c) and total insulin dose. In contrast, fasting plasma glucose and body weight did not show statistically significant differences between the two groups. Our analyses showed that CSII could be beneficial in patients with T2DM in order to achieve their glucose targets.


Asunto(s)
Diabetes Mellitus Tipo 1 , Diabetes Mellitus Tipo 2 , Humanos , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Inyecciones Subcutáneas , Sistemas de Infusión de Insulina , Insulina/uso terapéutico , Hipoglucemiantes/efectos adversos , Glucemia
2.
Molecules ; 27(19)2022 Sep 26.
Artículo en Inglés | MEDLINE | ID: mdl-36234882

RESUMEN

Rosmarinus officinalis is a well-studied plant, known for its therapeutic properties. However, its biological activity against several diseases is not known in detail. The aim of this study is to present new data regarding the cytotoxic activity of a hydroethanolic extract of Rosmarinus officinalis on glioblastoma (A172) and rhabdomyosarcoma (TE671) cancer cell lines. The chemical composition of the extract is evaluated using liquid chromatography combined with time-of-flight mass spectrometry, alongside its total phenolic content and antioxidant activity. The extract showed a promising time- and dose-dependent cytotoxic activity against both cell lines. The lowest IC50 values for both cell lines were calculated at 72 h after treatment and correspond to 0.249 ± 1.09 mg/mL for TE671 cell line and 0.577 ± 0.98 mg/mL for A172 cell line. The extract presented high phenolic content, equal to 35.65 ± 0.03 mg GAE/g of dry material as well as a strong antioxidant activity. The IC50 values for the antioxidant assays were estimated at 12.8 ± 2.7 µg/mL (DPPH assay) and 6.98 ± 1.9 µg/mL (ABTS assay). The compound detected in abundance was carnosol, a phenolic diterpene, followed by the polyphenol rosmarinic acid, while the presence of phenolic compounds such as rhamnetin glucoside, hesperidin, cirsimaritin was notable. These preliminary results suggest that R. officinalis is a potential, alternative source of bioactive compounds to further examine for abilities against glioblastoma and rhabdomyosarcoma.


Asunto(s)
Antipsicóticos , Glioblastoma , Hesperidina , Rabdomiosarcoma , Rosmarinus , Antioxidantes/química , Línea Celular , Glioblastoma/tratamiento farmacológico , Glucósidos , Humanos , Fenoles/análisis , Fenoles/farmacología , Extractos Vegetales/química , Extractos Vegetales/farmacología , Polifenoles/química , Rosmarinus/química
3.
Medicina (Kaunas) ; 58(2)2022 Feb 02.
Artículo en Inglés | MEDLINE | ID: mdl-35208548

RESUMEN

Background and Objectives: The association between diabetes mellitus and increased risk of bone fractures has led to the investigation of the impact of antidiabetic drugs on bone metabolism. Glucagon-like peptide-1 receptor agonists (GLP1RAs) are a relatively novel and promising class of anti-hyperglycemic drugs. In addition to their blood glucose lowering action, GLP1RAs seem to have additional pleiotropic properties such as a beneficial skeletal effect; although the underlying mechanisms are not completely understood. The present systematic review summarizes current evidence about GLP1RAs and their effects on bone metabolism and fracture. Methods: An extensive literature search was conducted based on electronic databases namely, PubMed, Google Scholar and Cochrane Central Register of Controlled Trials (CENTRAL) through October 2019 to January 2020 for articles related to bone mineral density, diabetes mellitus and GLP1RAs. We included articles published in English. Finally, we included four randomized controlled trials, three meta-analyses, a case-control study and a population-based cohort analysis. Results: Based on the articles included, the animal studies indicated the salutary skeletal effects of GLP1RAs in opposition to what has been commonly observed in human studies, showing that these agents have no impact on bone mineral density (BMD) and the turnover markers. Moreover, it was demonstrated that GLP1 was not associated with fracture risk as compared to other anti-hyperglycemic drugs. Conclusions: Findings from this systematic review have demonstrated the neutral impact of GLP1RAs on BMD. Moreover, further double-blind randomized controlled trials are needed to draw more meaningful and significant conclusions on the efficacy of GLP1RAs on BMD.


Asunto(s)
Diabetes Mellitus Tipo 2 , Fracturas Óseas , Animales , Glucemia/metabolismo , Estudios de Casos y Controles , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Fracturas Óseas/epidemiología , Fracturas Óseas/etiología , Humanos , Hipoglucemiantes/uso terapéutico , Ensayos Clínicos Controlados Aleatorios como Asunto
4.
Adv Exp Med Biol ; 1338: 183-191, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34973024

RESUMEN

Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval and/or RR variability (where R is a point corresponding to the peak of the QRS complex of the ECG wave and RR is the interval between successive Rs) and other components extracted from these. HRV is a field of research interest in pathophysiology (in general) and cancer prognosis (more specifically). Adolescents with adrenal tumor or craniopharyngioma were investigated, herein. Αutonomic nervous system recordings were performed with Task Force® Monitor (gold standard of the Task Force of the European Society of Cardiology and the North American Society of Electrophysiology). The RR interval (RRI) time series calculations were performed with the MatLab® computational environment and included the estimation of fractal dimension and Lyapunov exponent. Fractal dimensions were calculated by estimating N and R, where N represents the number of "squares" needed for a fractal shape to be completed and their respective "square size" R. By definition, if the first derivative of d ln N/d ln R remains constant for a space of R, this is the fractal dimension of the shape, in the present case of the time series trajectory. We found that RRI manifested different fractal dynamics, thus, a complex pattern of progression in these two morbid entities, suggesting the need for further investigation in ANS contribution to tumor pathophysiology.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales , Craneofaringioma , Neoplasias Hipofisarias , Adolescente , Fractales , Frecuencia Cardíaca , Humanos
5.
Adv Exp Med Biol ; 1339: 111-117, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35023097

RESUMEN

BACKGROUND: Kisspeptin (encoded by the KISS1 gene in humans) is an excitatory neuromodulatory peptide implicated in multiple homeostatic systems, including anti-oxidation, glucose homeostasis, nutrition, locomotion, etc. Therefore, in the current obesity epidemic, kisspeptin is gaining increasing interest as a research objective. AIM: To construct an updated interactome of genetic obesity, including the kisspeptin signal transduction pathway. METHODS: Kisspeptin and obesity-related genes or gene products were extracted from the biomedical literature, and a network of functional associations was created. RESULTS: The generated network contains 101 nodes corresponding to gene/gene products with known and/or predicted interactions. In this interactome, KISS1 and KISS1R are connected directly to the luteinizing hormone receptor (LHCGR), gonadotropin-releasing hormone receptor (GNRH1), and indirectly, through the latter, to proopiomelanocortin (POMC), glucagon, leptin (LEP), and/or pro-protein convertase subtilisin/kexin-type 1 (PCSK1), all of which are critically implicated in obesity disorders. CONCLUSIONS: Our updated obesidome includes kisspeptin and its connections to the genetic obesity signalosome with 12 major hubs: glucagon (GCG), insulin (INS), arginine vasopressin (AVP), G protein subunit beta 1 (GNB1) and proopiomelanocortin (POMC), melanocortin 4 receptor (MC4R), leptin (LEP), gonadotropin-releasing hormone 1 (GNRH1), adrenoceptor beta 2 and 3 (ADRB2-3), glucagon-like peptide 1 receptor (GLP1R), and melanocortin 3 receptor (MC3R) genes were identified as major "hubs" for genetic obesity, providing novel insight into the body's energy homeostasis.


Asunto(s)
Kisspeptinas , Obesidad , Humanos , Kisspeptinas/genética , Obesidad/genética , Proopiomelanocortina/genética , Receptores Acoplados a Proteínas G , Receptores de Kisspeptina-1
6.
Adv Exp Med Biol ; 1339: 121-129, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35023099

RESUMEN

Heart rate variability (HRV) represents one of the two key markers of the autonomic nervous system. It is measured by the time variation in the beat-to-beat interval, while the period between successive beats is defined as the RR interval (RRI). Its components are classified as linear and non-linear. In the field of psychophysiology, HRV is investigated as a key player of possible predictive or diagnostic value. Female adolescents with general learning disabilities or dyslexia were recruited at the Center for Adolescent Medicine and UNESCO Chair on Adolescent Health Care of the National and Kapodistrian University of Athens. Adolescents were further assessed for HRV. Data were collected with the Task Force® Monitor at the Cardiovascular Laboratory of the Biomedical Research Foundation of the Academy of Athens. The RRI time-series were estimated for approximate entropy (AE), conditional entropy (CE), corrected conditional entropy (CCE), fuzzy entropy (FE), permutation entropy (PE), sample entropy (SE), and Shannon's entropy (ShE). RRI manifested complex dynamics, indicating a complex pattern of progression. This finding suggests that RRI conceals non-linear dynamics, which if investigated in depth could provide more knowledge on the relation between RRI and learning disorders.


Asunto(s)
Dislexia , Discapacidades para el Aprendizaje , Adolescente , Sistema Nervioso Autónomo , Entropía , Femenino , Frecuencia Cardíaca , Humanos , Discapacidades para el Aprendizaje/diagnóstico
7.
Adv Exp Med Biol ; 1339: 65-76, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35023092

RESUMEN

Thalassemia major (TM) is a hereditary disease caused by defective globin synthesis. Because of the significant increase in life expectancy, these patients are suffering from various health conditions, including endocrinopathies and low bone mineral density. The aim of the present study was to investigate the correlation between clinical and biochemical parameters as well as to identify possible relations in a genotype to phenotype pattern. Sixty-four patients with TM (32 men and 32 women) participated in a cross-sectional study design. The patients were recruited from "Aghia Sofia" Children's Hospital. Clinical and biochemical parameters were evaluated as well as specific mutations were identified. We have found significant correlations between biochemical parameters and iron chelation, hormone replacement treatment as well as TM genotype and hematocrit and T-score. To conclude, the current study showed that clinical parameters of TM patients correlate significantly with both biochemical factors and genotypical patient parameters. Our present study showed that there is a connection between genotype and phenotype as, for example, the identified relation between hematocrit and T-scores and TM-specific mutations. This connection indicates that there is still much more to learn about the role of mutations not only in the disease itself but also in the underlying comorbidities.


Asunto(s)
Talasemia beta , Estudios Transversales , Femenino , Genotipo , Humanos , Masculino , Mutación , Fenotipo , Talasemia beta/genética
8.
Adv Exp Med Biol ; 1339: 209-220, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35023108

RESUMEN

Chronic spontaneous urticaria (CSU, or CU) is a disease that significantly affects the quality of life of patients. The connection between the cognitive state of an individual and dermatological diseases has been previously reported, and it is known, although not thoroughly investigated, that there is a cognitive and quality of life relation to dermal pathologies. Urticaria is a chronic disease that requires a specialized approach to diagnosis and treatment but also a holistic approach with respect to the consideration of both the pathophysiology of the disease and the cognition status of the patient. The present study aims at analyzing CU score and cognitive indexes with respect to time, as a time series and their subsequent interactions. We have attempted to model the investigated time series in order to unravel possible causative relationships between cognitive/quality of life factors and urticaria. One hundred and eleven patients (29 males/82 females) admitted to our department were diagnosed with CU. CU was estimated on UAS7 score basis, which was used in order to define disease severity. Indexes used for assessing the cognitive and quality of life of patients' status included the Urticaria Control Test (UCT) and Dermatology Life Quality Index (DLQI). Significant correlations were found between UAS7 score and the UCT and DLQI scores, respectively. Interestingly, each score time series was modelled by different sets of equations, indicating the unique effect each one has on the disease, as well as that each score probably is manifested by a different pathophysiological mechanism.


Asunto(s)
Urticaria Crónica , Urticaria , Enfermedad Crónica , Cognición , Femenino , Humanos , Masculino , Calidad de Vida
9.
Adv Exp Med Biol ; 1338: 55-66, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34973010

RESUMEN

Acute lymphoblastic leukemia is the most common childhood malignancy. Rhabdomyosarcoma, on the other hand, is a rare type of malignancy which belongs to the primitive neuroectodermal family of tumors. The aim of the present study was to use computational methods in order to examine the similarities and differences of the two different tumors using two cell lines as a model, the T-cell acute lymphoblastic leukemia CCRF-CEM and rhabdomyosarcoma TE-671, and, in particular, similarities of the metabolic pathways utilized by two different cell types in vitro. Both cell lines were studied using microarray technology. Differential expression profile has revealed genes with similar expression, suggesting that there are common mechanisms between the two cell types, where some of these mechanisms are preserved from their ancestor embryonic cells. Expression of identified species was modeled using known functions, in order to find common patterns in metabolism-related mechanisms. Species expression manifested very interesting dynamics, and we were able to model the system with elliptical/helical functions. We discuss the results of our analysis in the context of the commonly occurring genes between the two cell lines and the respective participating pathways as far as extracellular signaling and cell cycle regulation/proliferation are concerned. In the present study, we have developed a methodology, which was able to unravel some of the underlying dynamics of the metabolism-related species of two different cell types. Such approaches could prove useful in understanding the mechanisms of tumor ontogenesis, progression, and proliferation.


Asunto(s)
Leucemia-Linfoma Linfoblástico de Células Precursoras , Leucemia-Linfoma Linfoblástico de Células T Precursoras , Rabdomiosarcoma , Línea Celular Tumoral , Niño , Humanos , Metabolómica , Rabdomiosarcoma/genética
10.
Adv Exp Med Biol ; 1338: 67-79, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34973011

RESUMEN

Glucocorticoids are ubiquitous, pleotropic steroid hormones secreted from the cortices of the adrenal glands in a circadian fashion under the strong influence of the central Clock center located in the suprachiasmatic nuclei (SCN) of the hypothalamus. In previous work, we reported that the circadian transcription factor CLOCK and its heterodimer partner BMAL1 suppress the transcriptional activity of the glucocorticoid receptor (GR) by acetylating a lysine cluster located in its hinge region between the DNA- and ligand-binding domains. This regulation of GR transcriptional activity by CLOCK/BMAL1 functions as a counter-regulatory loop against the diurnally fluctuating circulating glucocorticoids. Here, we have performed further analyses of our data using bioinformatics and computational methods. Gene expression data were analyzed using unsupervised machine learning methods, such as hierarchical clustering, k-means, Naïve Bayes classification, and polynomial regression analyses. We determined expression patterns of Clock-related genes, unraveled the dynamics of spatial data, and defined the temporal function of Clock-mediated GR-regulated genes. Gene expressions manifested nonlinear dynamics, possibly because we obtained dynamic results from stationary measurements. The mechanics of the circadian rhythms are still obscure, and more studies are required to understand how such rhythms influence mammalian physiology.


Asunto(s)
Relojes Circadianos , Receptores de Glucocorticoides , Animales , Teorema de Bayes , Proteínas CLOCK/genética , Relojes Circadianos/genética , Biología Computacional , Expresión Génica , Receptores de Glucocorticoides/genética
11.
Int J Mol Sci ; 22(11)2021 May 31.
Artículo en Inglés | MEDLINE | ID: mdl-34072627

RESUMEN

BACKGROUND: Glucocorticoids play an essential part in anti-leukemic therapies, but resistance is a crucial event for the prognosis of the disease. Glucocorticoids influence the metabolic properties of leukemic cells. The inherent plasticity of clinically evolving cancer cells justifies the characterization of drug-induced early oncogenic pathways, which represent a likely source of detrimental secondary effects. AIM: The present work aims to investigate the effect of glucocorticoids in metabolic pathways in the CCRF-CEM leukemic cells. Metabolic factors and gene expression profiles were examined in order to unravel the possible mechanisms of the CCRF-CEM leukemic cell growth dynamics. METHODS: CCRF-CEM cells were used as a model. Cells were treated with prednisolone with concentrations 0-700 µM. Cell culture supernatants were used for glucose, lactic acid, LDH, Na+, K+ and Ca++ measurements. Cytotoxicity was determined with flow cytometry. Microarray analysis was performed using two different chips of 1.2 k and 4.8 k genes. Gene Ontology enrichment analysis was applied to find metabolism- and GC-related genes. RESULTS: Higher prednisolone concentrations inhibited glucose uptake, without exhibiting any cytotoxic effects. Glucose consumption did not correlate with the total cell population, or the viable population, indicating that growth is not directly proportional to glucose consumption. Neither of the subpopulations, i.e., viable, necrotic, or apoptotic cells, contributed to this. CONCLUSIONS: Different types of leukemic cells seem to exhibit different patterns of glucose metabolism. Both resistant and sensitive CCRF-CEM cells followed the aerobic pathway of glycolysis. There is probably a rapid change in membrane permeability, causing a general shutdown towards everything that is outside the cell. This could in part also explain the observed resistance. Glucocorticoids do not enter the cell passively anymore and therefore no effects are observed. Based on our observations, ion concentrations are measurable factors both in vitro and in vivo, which makes them possible markers of glucocorticoid cytotoxic action.


Asunto(s)
Metabolismo Energético/efectos de los fármacos , Regulación Leucémica de la Expresión Génica/efectos de los fármacos , Glucocorticoides/farmacología , Leucemia/genética , Leucemia/metabolismo , Antineoplásicos/farmacología , Antineoplásicos/uso terapéutico , Biomarcadores , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Biología Computacional/métodos , Perfilación de la Expresión Génica , Ontología de Genes , Glucocorticoides/uso terapéutico , Glucólisis , Humanos , Leucemia/tratamiento farmacológico , Leucemia/patología , Prednisolona/farmacología , Transcriptoma , Células Tumorales Cultivadas
12.
Molecules ; 26(9)2021 May 08.
Artículo en Inglés | MEDLINE | ID: mdl-34066886

RESUMEN

Gravity constituted the only constant environmental parameter, during the evolutionary period of living matter on Earth. However, whether gravity has affected the evolution of species, and its impact is still ongoing. The topic has not been investigated in depth, as this would require frequent and long-term experimentations in space or an environment of altered gravity. In addition, each organism should be studied throughout numerous generations to determine the profound biological changes in evolution. Here, we review the significant abnormalities presented in the cardiovascular, immune, vestibular and musculoskeletal systems, due to altered gravity conditions. We also review the impact that gravity played in the anatomy of snakes and amphibians, during their evolution. Overall, it appears that gravity does not only curve the space-time continuum but the biological continuum, as well.


Asunto(s)
Evolución Biológica , Fenómenos Fisiológicos Cardiovasculares , Hipergravedad , Sistema Inmunológico/fisiología , Fenómenos Fisiológicos Musculoesqueléticos , Glándula Tiroides/fisiología , Vestíbulo del Laberinto/fisiología , Ingravidez , Animales , Humanos , Vuelo Espacial
13.
Mol Biol Rep ; 47(5): 4047-4063, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-32239468

RESUMEN

Disruption of tissue function activates cellular stress which triggers a number of mechanisms that protect the tissue from further damage. These mechanisms involve a number of homeostatic modules, which are regulated at the level of gene expression by the transactivator NF-κB. This transcription factor shifts between activation and repression of discrete, cell-dependent gene expression clusters. Some of its target genes provide feedback to NF-κB itself, thereby strengthening the inflammatory response of the tissue and later terminating inflammation to facilitate restoration of tissue homeostasis. Disruption of key feedback modules for NF-κB in certain cell types facilitates the survival of clones with genomic aberrations, and protects them from being recognized and eliminated by the immune system, to enable thereby carcinogenesis.


Asunto(s)
FN-kappa B/genética , FN-kappa B/metabolismo , FN-kappa B/fisiología , Animales , Expresión Génica/genética , Regulación de la Expresión Génica/genética , Homeostasis/genética , Homeostasis/fisiología , Humanos , Inflamación/genética , Inflamación/metabolismo
14.
Int J Mol Sci ; 21(20)2020 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-33076450

RESUMEN

The growth arrest-specific transcript 5 (GAS5) is a >200-nt lncRNA molecule that regulates several cellular functions, including proliferation, apoptosis, invasion and metastasis, across different types of human cancers. Here, we reviewed the current literature on the expression of GAS5 in leukemia, cervical, breast, ovarian, prostate, urinary bladder, lung, gastric, colorectal, liver, osteosarcoma and brain cancers, as well as its interaction with various miRNAs and its effect on therapy-related resistance in these malignancies. The general consensus is that GAS5 acts as a tumor suppressor across different tumor types and that its up-regulation results in tumor sensitization to chemotherapy or radiotherapy. GAS5 seems to play a previously unappreciated, but significant role in tumor therapy-induced resistance.


Asunto(s)
Resistencia a Antineoplásicos , Neoplasias/genética , ARN Largo no Codificante/genética , Animales , Genes Supresores de Tumor , Humanos , MicroARNs/genética , MicroARNs/metabolismo , Neoplasias/tratamiento farmacológico , ARN Largo no Codificante/metabolismo
15.
Horm Metab Res ; 51(12): 770-778, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31826272

RESUMEN

Hypercalcemia of malignancy is the most common life-threatening metabolic disorder in patients with advanced stage cancers and is a sign of poor prognosis. It usually presents with markedly elevated calcium level and is severely symptomatic. It is associated with hematological malignancies, such as multiple myeloma, non-Hodgkin lymphoma, leukemias and solid cancers, particularly renal and breast carcinomas as well as squamous cell carcinomas of any organ. Several mechanisms have been implicated in the development of hypercalcemia of malignancy amongst them the osteolytic related hypercalcemia, parathyroid hormone-related peptide (PTHrP) mediated hypercalcemia, extrarenal 1,25 dixydroxyvitamin D (calcitriol) mediated hypercalcemia and parathyroid hormone (PTH) related hypercalcemia either ectopic in origin or in patients with parathyroid carcinoma. Clinical history and and physical examination could point towards the correct diagnosis confirmed by the above-mentioned biochemical mediators of hypercalcemia. Early diagnosis and treatment lowering calcium levels in the blood can improve symptoms and the quality of life of these patients and avoid delays for further antitumor therapy.


Asunto(s)
Hipercalcemia/diagnóstico , Hipercalcemia/tratamiento farmacológico , Animales , Calcitriol/sangre , Humanos , Hipercalcemia/sangre , Hipercalcemia/patología , Hormona Paratiroidea/sangre , Proteína Relacionada con la Hormona Paratiroidea/sangre
16.
Curr Genomics ; 20(3): 184-198, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-31929726

RESUMEN

BACKGROUND: Microgravity (µG) negatively influences bone metabolism by affecting normal osteoblast and osteoclast function. µG effects on bone metabolism has been an extensive field of study in recent years, due to the challenges presented by space flight. METHODS: We systematically reviewed research data from genomic studies performed in real or simulat-ed µG, on osteoblast and osteoclast cells. Our search yielded 50 studies, of which 39 concerned cells of the osteoblast family and 11 osteoclast precursors. RESULTS: Osteoblastic cells under µG show a decreased differentiation phenotype, proved by diminished expression levels of Alkaline Phosphatase (ALP) and Osteocalcin (OCN) but no apoptosis. Receptor Activator of NF-κB Ligand (RANKL)/ Osteoprotegerine (OPG) ratio is elevated in favor of RANKL in a time-dependent manner, and further RANKL production is caused by upregulation of Interleukin-6 (IL-6) and the inflammation pathway. Extracellular signals and changes in the gravitational environment are perceived by mechanosensitive proteins of the cytoskeleton and converted to intracellular signals through the Mitogen Activated Protein Kinase pathway (MAPK). This is followed by changes in the ex-pression of nuclear transcription factors of the Activator Protein-1 (AP-1) family and in turn of the NF-κB, thus affecting osteoblast differentiation, cell cycle, proliferation and maturation. Pre-osteoclastic cells show increased expression of the marker proteins such as Tryptophan Regulated Attenuation Protein (TRAP), cathepsin K, Matrix Metalloproteinase-9 (MMP-9) under µG conditions and become sensitized to RANKL. CONCLUSION: Suppressing the expression of fusion genes such as syncytine-A which acts independently of RANKL, could be possible future therapeutic targets for microgravity side effects.

17.
J Musculoskelet Neuronal Interact ; 18(3): 304-319, 2018 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-30179207

RESUMEN

Bone erosions develop early in the course of rheumatoid arthritis (RA) and deteriorate progressively, causing joint damage and resulting in impaired functional capacity of patients. During the last years, considerable number of studies has increased our understanding of the pathogenetic mechanisms mediating the development of bone erosions in RA. Increased production of RANKL and other cytokines, dysregulation of innate immune mechanisms, autoantibodies specific to RA and alterations of microRNA expression stimulate differentiation and function of osteoclasts, which are responsible for the development of bone erosions. Besides, increased levels of cytokines, overproduction of antagonists of the canonical Wnt signaling pathway and deficient production of bone morphogenetic proteins result in impaired osteoblast differentiation and function, undermining the capacity of bone erosions to repair. Disease-modifying antirheumatic drugs, synthetic or biological, currently used in the treatment of RA, can halt the progression of bone erosions and may even lead to partial repair, although complete repair is unattainable. Targeting pathogenetic mechanisms participating in the erosive process may add to the therapeutic effect of DMARDs and help in the prevention or repair of bone erosions. However, more studies are still needed to confirm whether such therapeutic strategies are effective.


Asunto(s)
Artritis Reumatoide/patología , Resorción Ósea/patología , Osteogénesis/fisiología , Artritis Reumatoide/metabolismo , Resorción Ósea/metabolismo , Citocinas/metabolismo , Progresión de la Enfermedad , Humanos
18.
J Musculoskelet Neuronal Interact ; 18(4): 509-524, 2018 12 01.
Artículo en Inglés | MEDLINE | ID: mdl-30511955

RESUMEN

OBJECTIVES: Obesity is characterized by a chronic, low grade, systemic inflammation. However, little is known about the role of skeletal muscle, which represents an active metabolic organ whose activities need to be determined. The purpose of our study was to detect relationships between skeletal muscle and adipose tissue inflammation with nonalcoholic fatty liver disease (NAFLD) and diabetes, as well as to explore associations with clinicopathological parameters. METHODS: Our study population consisted of 50 morbidly obese patients undergoing planned bariatric surgery. Biopsies were taken from visceral adipose tissue (VAT), subcutaneous adipose tissue (SAT), skeletal muscle (SM), extramyocellular adipose tissue (EMAT) and liver. The expression of CD68 and CD3 was assessed by immunohistochemistry. RESULTS: Our findings suggest a complex inter- and intra-tissue co-expression network that links obesity-induced inflammation in adipose depots and skeletal muscle with NAFLD. A novel finding is the intricate cross-talk between SM, EMAT and the liver and the probable correlation between SM, EMAT inflammation and the presence of liver fibrosis. CONCLUSIONS: Although the mechanisms of obesity-induced inflammation and its association with NAFLD and liver fibrosis are incompletely understood, our findings indicate an extensive and complex tissue network that needs to be further investigated.


Asunto(s)
Tejido Adiposo/patología , Mediadores de Inflamación/sangre , Cirrosis Hepática/sangre , Cirrosis Hepática/diagnóstico , Músculo Esquelético/patología , Obesidad Mórbida/sangre , Obesidad Mórbida/diagnóstico , Tejido Adiposo/metabolismo , Adulto , Femenino , Humanos , Inflamación/sangre , Inflamación/diagnóstico , Inflamación/epidemiología , Cirrosis Hepática/epidemiología , Masculino , Persona de Mediana Edad , Músculo Esquelético/metabolismo , Obesidad Mórbida/epidemiología , Adulto Joven
19.
Tumour Biol ; 39(3): 1010428317694308, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-28349830

RESUMEN

The AML1 ( acute myeloid leukemia 1) gene, a necessary prerequisite of embryonic hematopoiesis and a critical regulator of normal hematopoietic development, is one of the most frequently mutated genes in human leukemia, involving over 50 chromosome translocations and over 20 partner genes. In the few existing studies investigating AML1 gene expression in childhood leukemias, aberrant upregulation seems to specifically associate with AML1 translocations and amplifications. The aim of this study was to determine whether overexpression also extends to other leukemic subtypes than the ones karyotypically involving AML1. We use quantitative real-time polymerase chain reaction methodology to investigate gene expression in 100 children with acute leukemias and compare them to those of healthy controls. We show that in childhood acute lymphoblastic leukemia, AML1 gene overexpression is associated with a variety of leukemic subtypes, both immunophenotypically and cytogenetically. Statistically significantly higher transcripts of the gene were detected in the acute lymphoblastic leukemia group as compared to the acute myeloid leukemia group, where AML1 overexpression appeared to associate with cytogenetic abnormalities additional to those that engage the AML1 gene, or that are reported as showing a "normal" karyotype. Collectively, our study shows that AML1 gene overexpression characterizes a broader range of leukemic subtypes than previously thought, including various maturation stages of B-cell acute lymphoblastic leukemia and cytogenetic types additional to those involving the AML1 gene.


Asunto(s)
Subunidad alfa 2 del Factor de Unión al Sitio Principal/genética , Leucemia Mieloide Aguda/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Estudios de Casos y Controles , Línea Celular Tumoral , Niño , Subunidad alfa 2 del Factor de Unión al Sitio Principal/biosíntesis , Femenino , Expresión Génica , Humanos , Leucemia Mieloide Aguda/metabolismo , Masculino , Leucemia-Linfoma Linfoblástico de Células Precursoras/metabolismo , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Tasa de Supervivencia
20.
Eur J Clin Invest ; 45(2): 126-34, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25431352

RESUMEN

BACKGROUND: This large cross-sectional, multi-centre study evaluated the association of body composition measurements by a novel dual frequency bioimpedance device (BIA-ACC) with chronic stress/inflammation biomarkers and the presence of medically unexplained symptoms (MUS). MATERIALS AND METHODS: Participants were adult Caucasians of both sexes and included 10,416 lean subjects with no MUS (Group A), 58,710 lean subjects with MUS (Group B) and 30,445 overweight/obese subjects with no MUS and excessive fat mass (FM) (Group C). RESULTS: Total body extracellular water (ECW) was higher, while intracellular water (ICW) was lower in Group B than both other groups (P < 0.01). Group A had significantly lower FM and higher skeletal mass (SK) and phase angle (PA) than Group B and lower circulating high sensitivity (hs) CRP levels than both other groups. hsCRP was higher in Group C than Group A though (P < 0.01). Salivary cortisol in Group B was lower in the morning and higher in the evening than both other groups (P < 0.001), indicating circadian rhythm obliteration or reversal in this group. ECW correlated positively with serum hsCRP and 8 p.m. salivary cortisol, but negatively with 8 a.m. salivary cortisol, while PA correlated positively with 8 a.m. and negatively with 8 p.m. salivary cortisol and serum hsCRP. Both 8 a.m. and 8 p.m. salivary cortisol and serum hsCRP were associated with the presence of MUS and BIA-ACC measurements, including ECW, ICW, FM, SK and PA. CONCLUSIONS: MUS is an index of chronic stress and inflammation and BIA-ACC may provide a useful, bloodless and rapid tool in the clinical setting, distinguishing patients with chronic stress/inflammation from healthy subjects and monitoring their response to treatment.


Asunto(s)
Composición Corporal/fisiología , Inflamación/psicología , Trastornos Psicofisiológicos/psicología , Estrés Psicológico/etiología , Adulto , Anciano , Anciano de 80 o más Años , Biomarcadores/metabolismo , Estudios Transversales , Impedancia Eléctrica , Femenino , Humanos , Hidrocortisona/metabolismo , Inflamación/metabolismo , Masculino , Persona de Mediana Edad , Trastornos Psicofisiológicos/metabolismo , Saliva/química , Estrés Psicológico/metabolismo , Adulto Joven
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