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Non-Cytotoxic Sulfated Heterorhamnan from Gayralia brasiliensis Green Seaweed Reduces Driver Features of Melanoma Metastatic Progression. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2020; 22:194-206. [PMID: 31970542 DOI: 10.1007/s10126-020-09944-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
Melanoma is a form of skin cancer with high mortality owing to its fast progression and metastatic capacity. The treatments available nowadays are only palliative in advanced stages of the disease. Thus, alternative therapies for cancer treatment are in demand, and molecules from natural sources, such as polysaccharides, could represent new possible therapeutic approaches. Polysaccharides of freshwater and marine algae with biological activities, such as antitumor properties, are greatly reported in the scientific literature. In the present study, a sulfated heterorhamnan obtained from the green seaweed Gayralia brasiliensis (Gb1 fraction) was chemically characterized and its biological activities in the B16-F10 murine melanoma cell line were evaluated. The Gb1 polysaccharidic fraction tested concentrations presented low or absence of cytotoxicity to B16-F10 cells and neither cell proliferation nor cell cycle were altered. Interestingly, Gb1 treatment decreased B16-F10 cells migration and invasion capabilities and CD44 labeling, showing to be a promising compound for further in vitro and in vivo antitumor studies.
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Effects of NO/cGMP inhibitors in a rat model of anaphylactoid shock. ACTA ACUST UNITED AC 2020; 53:e8853. [PMID: 32130289 PMCID: PMC7057939 DOI: 10.1590/1414-431x20198853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 12/04/2019] [Indexed: 11/27/2022]
Abstract
Anaphylactic shock can be defined as an acute syndrome, and it is the most severe clinical manifestation of allergic diseases. Anaphylactoid reactions are similar to anaphylactic events but differ in the pathophysiological mechanism. Nitric oxide (NO) inhibitors during anaphylaxis suggest that NO might decrease the signs and symptoms of anaphylaxis but exacerbate associated vasodilation. Therefore, blocking the effects of NO on vascular smooth muscle by inhibiting the guanylate cyclase (GC) would be a reasonable strategy. This study aimed to investigate the effects of NO/cGMP pathway inhibitors methylene blue (MB), Nω-nitro-L-arginine methyl ester hydrochloride (L-NAME), and indigo carmine (IC) in shock induced by compound 48/80 (C48/80) in rats. The effect was assessed by invasive blood pressure measurement. Shock was initiated by C48/80 intravenous bolus injection 5 min before (prophylactic) or after (treatment) the administration of the inhibitors MB (3 mg/kg), L-NAME (1 mg/kg), and IC (3 mg/kg). Of the groups that received drugs as prophylaxis for shock, only the IC group did not present the final systolic blood pressure (SBP) better than the C48/80 group. Regarding shock treatment with the drugs tested, all groups had the final SBP similar to the C48/80group. Altogether, our results suggested that inhibition of GC and NO synthase in NO production pathway was not sufficient to revert hypotension or significantly improve survival.
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Abstract
The aim of this study was to evaluate the effects of oat beta-glucan supplementation on metabolic, physiological, immunological and nutritional variables in adult dogs. Fourteen dogs were fed a control diet or a diet supplemented with 1% beta-glucan during 71 days. Serum concentrations of glucose, total cholesterol and lipoprotein fractions, as well as plasma concentrations of peptide YY and ghrelin, were determined. In addition, coefficient of total tract apparent macronutrient digestibility (CTTAD), food intake and fecal output, score, and pH were evaluated. For evaluation of immunological variables, serum concentrations of interleukin-4 and interferon gamma were determined on days 0, 57 and 71, which corresponded to blood collection prior to beta-glucan supplementation, and at 7 and 14 days post first and second dose of vaccination (Pneumodog®, Merial, Campinas, Brazil), respectively. Animals fed the supplemented diet showed (P<0.05) lower serum concentrations of total cholesterol and low and very low density lipoproteins, lower coefficients of total tract apparent digestibility of dry matter, organic matter, mineral matter and ether extract, higher fecal output and lower fecal consistency, as well as a tendency (P = 0.07) of decreasing the coefficient of total tract apparent digestibility of crude protein. Moreover, the supplemented diet resulted in lower number of red blood cells, hematocrit percentage and hemoglobin concentration 21 days post-vaccination as well as lower serum concentration of interleukin-4 seven days post-vaccination (P<0.05). It is concluded that oat beta-glucan extract can be used as a dietary supplement for dogs at a dose of 10 g/kg of food, being effective in reducing blood concentrations of total cholesterol, LDL-c and VLDL-c as well as CTTAD of nutrients, demonstrating a potential to be used in the feeding of obese animals. In addition, by reducing the predominance of a Th2 response, oat beta-glucan can positively modulate the vaccine response of animals.
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Association of CXCL13 serum level and ultrasonographic findings of joints in patients with systemic lupus erythematosus and Jaccoud’s arthropathy. Lupus 2018; 27:939-946. [DOI: 10.1177/0961203317753557] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Replacing wheat bran by corn gluten feed without steep water in complete dog food. ITALIAN JOURNAL OF ANIMAL SCIENCE 2018. [DOI: 10.1080/1828051x.2017.1335183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Impulse oscillometry, spirometry, and passive smoking in healthy children and adolescents. REVISTA PORTUGUESA DE PNEUMOLOGIA 2017; 23:311-316. [PMID: 28760702 DOI: 10.1016/j.rppnen.2017.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 05/17/2017] [Accepted: 06/25/2017] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE To identify changes in the forced and quiet breathing parameters of lung function in healthy children and adolescents exposed to passive smoking (PS). METHOD Comparative cross-sectional study. Healthy schoolchildren aged 6 to 14 years. We collected anthropometric data, lung function parameters using spirometry (forced breathing), and quiet breathing parameters using impulse oscillometry. The sample was divided into two groups according to exposure to PS: passive smoking group (PSG) and non-passive smoking group (NPSG). For the statistical analysis, the Shapiro-Wilk test was used to verify data normality and the T-test or Mann-Whitney test to compare spirometric and oscillometric parameters between groups (p≤0.05). MAIN FINDINGS The study included 78 children and adolescents, with 14 boys and 25 girls in each group. There were differences in the mean values for peak expiratory flow (p=0.01). There were no significant differences between the groups in values for z-score and lower limit of normal. The PSG had higher mean absolute values for reactance area (X5=0.05) and significant percentage of predicted values for the following impulse oscillometry parameters: central airway resistance (R20%, p=0.03) and for the indicators of presence of airway obstruction (Fres%, p=0.01; X5%=0.01% and AX%, p=0.01). CONCLUSION Children and adolescents exposed to PS had lower values for the spirometric variables and higher values for the oscillometric variables, indicating changes in forced and quiet parameters of lung function compared to the NPSG.
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Acute but not chronic metabolic acidosis potentiates the acetylcholine-induced reduction in blood pressure: an endothelium-dependent effect. ACTA ACUST UNITED AC 2015; 49:e5007. [PMID: 26648089 PMCID: PMC4712485 DOI: 10.1590/1414-431x20155007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 09/08/2015] [Indexed: 11/22/2022]
Abstract
Metabolic acidosis has profound effects on vascular tone. This study investigated the in vivo effects of acute metabolic acidosis (AMA) and chronic metabolic acidosis (CMA) on hemodynamic parameters and endothelial function. CMA was induced by ad libitum intake of 1% NH4Cl for 7 days, and AMA was induced by a 3-h infusion of 6 M NH4Cl (1 mL/kg, diluted 1:10). Phenylephrine (Phe) and acetylcholine (Ach) dose-response curves were performed by venous infusion with simultaneous venous and arterial blood pressure monitoring. Plasma nitrite/nitrate (NOx) was measured by chemiluminescence. The CMA group had a blood pH of 7.15±0.03, which was associated with reduced bicarbonate (13.8±0.98 mmol/L) and no change in the partial pressure of arterial carbon dioxide (PaCO2). The AMA group had a pH of 7.20±0.01, which was associated with decreases in bicarbonate (10.8±0.54 mmol/L) and PaCO2 (47.8±2.54 to 23.2±0.74 mmHg) and accompanied by hyperventilation. Phe or ACh infusion did not affect arterial or venous blood pressure in the CMA group. However, the ACh infusion decreased the arterial blood pressure (ΔBP: -28.0±2.35 mm Hg [AMA] to -4.5±2.89 mmHg [control]) in the AMA group. Plasma NOx was normal after CMA but increased after AMA (25.3±0.88 to 31.3±0.54 μM). These results indicate that AMA, but not CMA, potentiated the Ach-induced decrease in blood pressure and led to an increase in plasma NOx, reinforcing the effect of pH imbalance on vascular tone and blood pressure control.
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Abstract
Erythropoietin (EPO) has been well characterized as a renal glycoprotein hormone
regulating red blood cell production by inhibiting apoptosis of erythrocyte
progenitors in hematopoietic tissues. EPO exerts regulatory effects in cardiac and
skeletal muscles. Duchenne muscular dystrophy is a lethal degenerative disorder of
skeletal and cardiac muscle. In this study, we tested the possible therapeutic
beneficial effect of recombinant EPO (rhEPO) in dystrophic muscles in mdx mice. Total
strength was measured using a force transducer coupled to a computer. Gene expression
for myostatin, transforming growth factor-β1 (TGF-β1), and tumor necrosis factor-α
(TNF-α) was determined by quantitative real time polymerase chain reaction. Myostatin
expression was significantly decreased in quadriceps from mdx mice treated with rhEPO
(rhEPO=0.60±0.11, control=1.07±0.11). On the other hand, rhEPO had no significant
effect on the expression of TGF-β1 (rhEPO=0.95±0.14, control=1.05±0.16) and TNF-α
(rhEPO=0.73±0.20, control=1.01±0.09). These results may help to clarify some of the
direct actions of EPO on skeletal muscle.
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Electron scattering from molecules: applications of the Schwinger multichannel method to e−–CO and e−–C2H4collisions. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/88/1/012028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Experimental and theoretical elastic cross sections for electron collisions with the C3H6 isomers. J Chem Phys 2006; 124:024323. [PMID: 16422599 DOI: 10.1063/1.2141950] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In the present work we report cross sections for electron collisions with the isomers propene (C3H6) and cyclopropane (c-C3H6). Electron-scattering differential cross sections (DCS) are reported for measurements carried out for energies 1.5-100 eV and the angular range of 20 degrees-120 degrees. Elastic integral cross sections (ECS), DCS, and momentum-transfer cross sections (MTCS) are reported for calculations carried out using the Schwinger multichannel method with pseudopotentials for the energy range of 2.0-40 eV and angular range of 0 degrees-180 degrees. The resemblance of the pi* shape resonance in the cross sections, observed at 1.5-2.0 eV for propene, to those in C2H4 and C2F4 clearly points to the effect of the double bond in the molecular structures for these molecules. Below 60 eV, we observed clear differences in peak positions and magnitudes between the DCS, ECS, and MTCS for C3H6 and c-C3H6, which we view as the isomer effect.
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Form factors and moments of Wannier function distributions in the nearly free electron limit. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/4/1/003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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An APW calculation of the energy band in diamond using different approximations for the exchange energy. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/6/23/016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Electronic excitation of H2 by electron impact using soft norm-conserving pseudopotentials. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 54:5435-5437. [PMID: 9914119 DOI: 10.1103/physreva.54.5435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Low-energy electron scattering by CF4, CCl4, SiCl4, SiBr4, and SiI4. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:R1-R4. [PMID: 9912322 DOI: 10.1103/physreva.52.r1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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[Lyme disease. Report of a case observed in Brazil]. REVISTA DO HOSPITAL DAS CLINICAS 1993; 48:170-4. [PMID: 8284588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Lyme disease is an infectious disease caused by spirochete Borrelia burgdorferi transmitted by Ixodid tick bite. The geographic distribution of the disease is universal, but the disease has not been identified definitely in South America yet. We report a probable case of Lyme disease in a woman, living in Jagůaré slum (São Paulo), who showed characteristics skin lesions of erythema chronicum migrans, with fever, weakness, headache, muscular pain, cough, arthralgia and sensitive radicular neuropathy in the left arm. The sequential serology made by ELISA method, using Borrelia burgdorferi whole sonicated antigen from Dr. Allen C. Steere laboratory, showed high titers of IgM antibody (1:1600). Because of the persistence of high IgM response for two months, we decided to treat the patient with tetracycline 2g/day during 10 days and the sorology became negative two months. The western blotting confirmed ELISA results showing presence of five bands (IgM). This report fulfills CDC criteria for Lyme disease diagnosis.
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Periodic-cluster calculations of the valence states and native defects in diamond, silicon, germanium, ZnS, ZnSe, and SiC. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:13219-13232. [PMID: 10005627 DOI: 10.1103/physrevb.47.13219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Transferability of local-density norm-conserving pseudopotentials to electron-molecule-collision calculations. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1993; 47:1111-1118. [PMID: 9909034 DOI: 10.1103/physreva.47.1111] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Efficient cluster expansion for substitutional systems. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:12587-12605. [PMID: 10003179 DOI: 10.1103/physrevb.46.12587] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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First-principles calculation of the order-disorder transition in chalcopyrite semiconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:2533-2536. [PMID: 10001790 DOI: 10.1103/physrevb.45.2533] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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First-principles statistical mechanics of structural stability of intermetallic compounds. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:512-544. [PMID: 9999151 DOI: 10.1103/physrevb.44.512] [Citation(s) in RCA: 126] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hole localization versus delocalization in symmetric molecular ions. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 43:3348-3354. [PMID: 9905417 DOI: 10.1103/physreva.43.3348] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Electronic properties of random alloys: Special quasirandom structures. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:9622-9649. [PMID: 9995203 DOI: 10.1103/physrevb.42.9622] [Citation(s) in RCA: 131] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cluster calculations of ZnO with Cu and Ni impurities. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:10735-10740. [PMID: 9993482 DOI: 10.1103/physrevb.41.10735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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First-principles calculation of temperature-composition phase diagrams of semiconductor alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:8240-8269. [PMID: 9993147 DOI: 10.1103/physrevb.41.8240] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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First-principles calculation of alloy phase diagrams: The renormalized-interaction approach. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:3197-3231. [PMID: 9992258 DOI: 10.1103/physrevb.40.3197] [Citation(s) in RCA: 121] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Search for almost universal density functionals based on one- and two-electron systems. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 39:4978-4982. [PMID: 9901058 DOI: 10.1103/physreva.39.4978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ordering of isovalent intersemiconductor alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:6338-6341. [PMID: 9947109 DOI: 10.1103/physrevb.38.6338] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chemical and elastic effects on isostructural phase diagrams: The epsilon -G approach. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:10547-10570. [PMID: 9944508 DOI: 10.1103/physrevb.37.10547] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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First-principles calculations of the phase diagrams of noble metals: Cu-Au, Cu-Ag, and Ag-Au. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:4163-4185. [PMID: 9943394 DOI: 10.1103/physrevb.36.4163] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Effect of chemical and elastic interactions on the phase diagrams of isostructural solids. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 35:6475-6478. [PMID: 9940891 DOI: 10.1103/physrevb.35.6475] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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First-principles calculation of semiconductor-alloy phase diagrams. PHYSICAL REVIEW LETTERS 1987; 58:49-52. [PMID: 10034287 DOI: 10.1103/physrevlett.58.49] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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New technique in the calculation of defects in solids by molecular methods: Pure and Cu-doped ZnS. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 34:5315-5319. [PMID: 9940363 DOI: 10.1103/physrevb.34.5315] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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