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Corrosion behavior of CoCrMoW cast alloy in lactic acid environment for surgical applications. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2017.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Benefit of continuous positive airway pressure on work quality in patients with severe obstructive sleep apnea. Sleep Breath 2019; 23:753-759. [PMID: 30685849 DOI: 10.1007/s11325-018-01773-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 12/14/2018] [Accepted: 12/17/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND The objective of this prospective study was to assess the effect of CPAP therapy on job productivity and work quality for patients with severe obstructive sleep apnea (OSA). METHODS A convenience sample of patients diagnosed with severe OSA using polysomnography or polygraphy and with a therapeutic indication for CPAP was enrolled in our study. Patients completed two self-administered questionnaires: the first before CPAP therapy and the second during the first 6 months after CPAP treatment. OSA symptoms were evaluated through self-administered questionnaires assessing potential effects on occupational activity: excessive daytime sleepiness was rated by the Epworth Sleepiness Scale (ESS), emotional status was rated by the Hospital Anxiety and Depression (HAD) scale, work quality was rated by the Work Role Functioning Questionnaire (WRFQ). RESULTS Forty patients (30 men, mean age 47.3 ± 8.3, mean BMI 31.6 ± 7.4, mean apnea-hypopnea index 51.8 ± 16.3) showed a beneficial effect of CPAP therapy on ESS score (mean 11.6 to 8.2, p < 0.0001), the anxiety dimension (mean 57.5% to 20%, p = 0.0002), and the overall anxiety-depressive score (mean 50% to 22.5%, p = 0.0006). Mean WRFQ scores were significantly improved in the second questionnaire for the dimensions of timetable requirements (69.3% to 83.5%, p < 0.0001), productivity requirements (71.4% to 82.2%, p < 0.0001), mental requirements (72.0% to 84.3%, p < 0.0001), and social requirements (82.6% to 91.4%, p < 0.003). CONCLUSIONS We observed that adherence to CPAP therapy for patients with severe OSA mitigates the impact of symptoms on work including excessive daytime sleepiness, impairment of work ability, and anxiety and depressive disorders.
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Nigella sativa L. seed and seed oil: potential sources of high-value components for development of functional foods and nutraceuticals/pharmaceuticals. JOURNAL OF ESSENTIAL OIL RESEARCH 2019. [DOI: 10.1080/10412905.2018.1562388] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Évaluation du bénéfice du traitement par ventilation en pression positive continue (PPC) sur la qualité du travail chez les patients présentant un Syndrome d’apnées–hypopnées obstructives du sommeil (SAHOS) sévère. Rev Mal Respir 2018. [DOI: 10.1016/j.rmr.2017.10.598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pancreatic cancer presenting with paraneoplastic thrombophlebitis--case report. J Med Life 2010; 3:96-9. [PMID: 20302205 PMCID: PMC3019029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
CONTEXT The complex of symptoms in pancreatic cancer is vague, which often delays presentation and diagnosis. Thrombophlebitis is an unusual presentation of pancreatic cancer, which appears more frequent in the cancer of the body and tail of the pancreas. CASE REPORT We present a case of a 52-years-old woman who was admitted to the hospital for a superficial thrombophlebitis. At the abdomen ultrasound screening, multiple liver masses, relatively well defined, with a hypo-echoic center and a hyper-echoic periphery, were identified. The head of the pancreas was normal, the body and the tail could not be seen very well due to flatulence. After computed tomography, the diagnosis was "Pancreatic tumor with multiple hepatic metastases (stage IV)". After the histopathological examination, 1250 mg/m2 of Gemcitabine was started on day 1 and 8 every 28 days, plus 100 mg/day of Erlotinib (Tarceva), every day. At the end of the seventh month of treatment, the patient suffered an irreversible ischemic cardiac event. CONCLUSION Superficial thrombophlebitis can be the initial manifestation of the pancreatic cancer. Gemcitabine and erlotinib is now a FDA approved regimen for patients with metastatic pancreatic cancer. While the search for the best gemcitabine based backbone for advanced pancreatic cancer continues, studies of anti-angiogenic agents alone or in combination with traditional chemotherapy, should be undertaken, as they may improve overall survival in this group of poor prognosis patients.
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IMP321 and weekly paclitaxel as first-line chemoimmunotherapy for metastatic breast cancer (MBC). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.1045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Studies on the Electronic Transport Properties of some New Chelate Compounds Containing Siloxane. J MACROMOL SCI B 2006. [DOI: 10.1080/00222340500251238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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[Sequential approach in a case of tracheal hemangioma: segmental tracheal resection after Nd-YAG laser application]. PNEUMOLOGIA (BUCHAREST, ROMANIA) 2005; 54:191-4. [PMID: 17069223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Tracheal tumors of malignant or benign origin are very rare. The symptoms may mimic asthmatic crisis, dyspnea at rest or light efforts appear only when the tumor obstructs 60% of the tracheal diameter. We present the case of a 50 year old patient, ex-smoker with symptoms present 5 years before admittance with dyspnea and small hemoptysis. Diagnosis was based on bronchoscopic examination, CT scan and histological examination of the resection sample revealing a rare benign tracheal tumor: a hemangioma. The sequential treatment of the disease is presented: interventional endoscopy and surgical resection. The excellent postoperative evolution emphasized the diagnostic and therapeutic value of bronchoscopy as well as surgery in benign tracheal tumors.
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Abstract
Ewing's tumor (ET) is a malignant bone tumor occurring in children and young adults. ET affects mainly bones of the central axis, and almost always involves soft tissue infiltration. The discovery of a unique genetic alteration, which is a reciprocal translocation most frequently resulting in the fusion of the EWS gene situated on chromosome 22 with the FLI-1 gene on chromosome 11, currently places ET among neuroectodermal tumors. Moreover, this translocation is a tumor-specific genetic marker at the basis of defining ET today and is used as a diagnostic and potentially prognostic tool complementary to imaging and histopathological work-up. Since the 1970 s, important progress has been made in the clinical management of ET patients. Multiagent chemotherapy in association with local treatment (surgery and/or radiation) has clearly improved outcome. The introduction of systemic treatment was justified by the frequent sub-clinical diffusion of apparently localized ET. Intensified therapeutic strategies have for the first time cured some metastatic ET patients, but at the cost of major side effects. Treatment is currently adapted as a result of a better definition of prognostic factors as well as a better assessment of its adverse effects. Improvement in global patient care and increased management of specific acute complications associated with ET (often interwoven with iatrogeneous effects) represent an important step towards improving the quality of life for ET patients as well as preventing long term complications. In the light of present studies, the majority of surviving adults today describe their health and quality of life as good. ET is a fascinating example of the progress made not only in the diagnostic and therapeutic approach to cancer but also in the comprehension of the mechanisms behind carcinogenesis, and consequently reflects the revolution of medicine over the last century.
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Surface charge and hydrophobicity determine ErbB2 binding to the Hsp90 chaperone complex. Nat Struct Mol Biol 2005; 12:120-6. [PMID: 15643424 DOI: 10.1038/nsmb885] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2004] [Accepted: 11/24/2004] [Indexed: 11/09/2022]
Abstract
The molecular chaperone Hsp90 modulates the function of specific cell signaling proteins. Although targeting Hsp90 with the antibiotic inhibitor geldanamycin (GA) may be a promising approach for cancer treatment, little is known about the determinants of Hsp90 interaction with its client proteins. Here we identify a loop within the N lobe of the kinase domain of ErbB2 that determines Hsp90 binding. The amino acid sequence of the loop determines the electrostatic and hydrophobic character of the protein's surface, which in turn govern interaction with Hsp90. A point mutation within the loop that alters ErbB2 surface properties disrupts Hsp90 association and confers GA resistance. Notably, the immature ErbB2 point mutant remains sensitive to GA, suggesting that mature and nascent client kinases may use distinct motifs to interact with the Hsp90 chaperone complex.
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Chelate polymers. IV. siloxanes functionalized with chelating groups derived from hydroxy-ketones, their metal complexes and some polymers. Appl Organomet Chem 2005. [DOI: 10.1002/aoc.873] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Chaperone-dependent E3 ubiquitin ligase CHIP mediates a degradative pathway for c-ErbB2/Neu. Proc Natl Acad Sci U S A 2002; 99:12847-52. [PMID: 12239347 PMCID: PMC130548 DOI: 10.1073/pnas.202365899] [Citation(s) in RCA: 341] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Overexpression of the transmembrane receptor tyrosine kinase ErbB2 is common in multiple malignancies, including breast and ovarian cancer. ErbB2 is resistant to degradation mediated by c-Cbl, the E3 ubiquitin ligase responsible for ligand-induced ubiquitination of ErbB1 (epidermal growth factor receptor). Because of its resistance to degradation, ErbB2 is the preferred dimerization partner for other members of the ErbB family, and its overexpression in vivo is associated with poor prognosis. We now show that the chaperone-binding ubiquitin ligase CHIP efficiently ubiquitinates and down-regulates ErbB2. CHIP expression shortens the half-life of both nascent and mature ErbB2 protein. In vitro ubiquitination assay shows that CHIP serves as a ubiquitin ligase for ErbB2, and both exogenously expressed and endogenous CHIP coprecipitate with the kinase. Furthermore, CHIP association with ErbB2 requires a chaperone intermediate and is increased by the chaperone-binding drug geldanamycin, a potent stimulator of ErbB2 ubiquitination and degradation. These data describe a previously unrecognized pathway, amenable to pharmacologic manipulation, that mediates ErbB2 stability.
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Sensitivity of mature Erbb2 to geldanamycin is conferred by its kinase domain and is mediated by the chaperone protein Hsp90. J Biol Chem 2001; 276:3702-8. [PMID: 11071886 DOI: 10.1074/jbc.m006864200] [Citation(s) in RCA: 300] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
ErbB receptors are a family of ligand-activated tyrosine kinases that play a central role in proliferation, differentiation, and oncogenesis. ErbB2 is overexpressed in >25% of breast and ovarian cancers and is correlated with poor prognosis. Although ErbB2 and ErbB1 are highly homologous, they respond quite differently to geldanamycin (GA), an antibiotic that is a specific inhibitor of the chaperone protein Hsp90. Thus, although both mature and nascent ErbB2 proteins are down-regulated by GA, only nascent ErbB1 is sensitive to the drug. To reveal the underlying mechanism behind these divergent responses, we made a chimeric receptor (ErbB1/2) composed of the extracellular and transmembrane domains of ErbB1 and the intracellular domain of ErbB2. The ErbB1/2 protein is functional since its kinase activity was stimulated by epidermal growth factor. The sensitivity of ErbB1/2 to GA was similar to that of ErbB2 and unlike that of ErbB1, indicating that the intracellular domain of the chimera confers GA sensitivity. This finding also suggests that the GA sensitivity of mature ErbB2 depends on cytosolic Hsp90, rather than Grp94, a homolog of Hsp90 that is restricted to the lumen of the endoplasmic reticulum, although both chaperones bind to and are inhibited by GA. Lack of Grp94 involvement in mediating ErbB2 sensitivity to GA is further suggested by the fact that a GA derivative with low affinity for Grp94 efficiently depleted ErbB2 protein in treated cells. To localize the specific region of ErbB2 that confers GA sensitivity, we made truncated receptors with progressive deletions of the cytoplasmic domain and tested the GA sensitivity of these molecules. We found that ErbB2 constructs containing an intact kinase domain retained GA sensitivity, whereas those lacking the kinase domain (ErbB2/DK) lost responsiveness to GA completely. Hsp90 co-immunoprecipitated with all ErbB2 constructs that were sensitive to GA, but not with ErbB2/DK or ErbB1. Both tyrosine-phosphorylated and non-phosphorylated ErbB2 proteins were similarly sensitive to GA, as was a kinase-dead ErbB2 mutant. These data suggest that Hsp90 uniquely stabilizes ErbB2 via interaction with its kinase domain and that GA stimulates ErbB2 degradation secondary to disruption of ErbB2/Hsp90 association.
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Repetitive acute pancreatic injury in the mouse induces procollagen alpha1(I) expression colocalized to pancreatic stellate cells. J Transl Med 2000; 80:143-50. [PMID: 10701684 DOI: 10.1038/labinvest.3780018] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Pancreatic stellate cells may be a major source of extracellular matrix deposition during injury. This study was undertaken to establish whether pancreatic stellate cells are a source of Type I collagen in vivo and whether they continue to be a source of matrix production in the post-injury fibrotic pancreas. To induce pancreatic fibrogenesis, acute pancreatic injury was induced in mice three times weekly with supraphysiologic doses of cerulein. Animals were treated for 6 weeks and allowed to recover for an additional 6 weeks. Stellate cell activation and pancreatic collagen expression were measured by immunohistochemistry, whole tissue RNA analysis, and in situ hybridization. Histology and digital image analysis demonstrated the development of substantial pancreatic fibrosis after 6 weeks of treatment. During recovery, incomplete resolution of the fibrosis was found. Procollagen alpha1(I) mRNA increased more than 15-fold during treatment and continued to be 5-fold elevated during the post-injury phase. In situ hybridization studies demonstrated that collagen gene expression was colocalized to activated pancreatic stellate cells. Collagen expression and fibrosis persisted in focal areas during recovery. These findings show that pancreatic stellate cells are the major source of collagen during repetitive injury in vivo. Additionally, focal areas of sustained pancreatic fibrogenesis persist after cessation of cerulein treatment, and these areas may contribute to sustained total organ collagen expression in the absence of ongoing injury.
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Quantum Monte Carlo simulation of the one-dimensional spin S xxz model. I. The method. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0305-4470/18/13/024] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Quantum Monte Carlo simulation of the one-dimensional spin-S xxz model. II. High precision calculations for S=1/2. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0305-4470/18/16/020] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Aphid species--vectors of plum pox virus. Acta Virol 1998; 42:233-4. [PMID: 10073225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Plum pox virus (PPV) is widely spread by natural vectors present in plum orchards. The efficiency of transmission is dependent on the frequency of the occurrence of vectors and the cultivar susceptibility to this pathogen. Having in view that PPV has a wide range of annual and multiannual host plants and vectors, there is great concern for obtaining PPV-resistant cultivars. This report deals with the following vectors: Hyalopterus pruni, Brachycaudus cardui, Brachycaudus helichrysi. Myzus persicae and Phorodon humuli aphids, and Aculus fockeni mite. Seven different cultivars of Prunus domestica were utilized. To assess the virus transmission rate, 50-100 individual vectors per tree were used. The treatment of the trees was performed every four weeks and then the disease symptoms were observed. PPV was transmitted by all vectors studied, the rate ranging in dependence on the susceptibility of cultivars used. Thus, in cvs. Centenar, Pescarus, d'Agen, Stanley and Tuleu Gras, the transmission rate ranged from 20% to 60%, while in susceptible cvs. Vanat romanesc and Vanat de Italia--from 40% to 80%.
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Silicone Rubbers. Ix. Contributions to Polydimethylsiloxane-α,ω-Diols Synthesis by Heterogeneous Catalysis. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1995. [DOI: 10.1080/10601329508019142] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Cluster algorithm for a solid-on-solid model with constraints. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:10472-10475. [PMID: 10002896 DOI: 10.1103/physrevb.46.10472] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Critical acceleration of finite-temperature SU(2) gauge simulations. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1991; 44:R2953-R2956. [PMID: 10013799 DOI: 10.1103/physrevd.44.r2953] [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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The living environment: personal dignity through physical design. JOURNAL - AMERICAN HEALTH CARE ASSOCIATION 1983; 9:8-11. [PMID: 10263916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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[Procedure for obtaining drinking water from polluted waters]. REVISTA MEDICO-CHIRURGICALA A SOCIETATII DE MEDICI SI NATURALISTI DIN IASI 1980; 84:495-8. [PMID: 7244473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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[Incidents and accidents of corticotherapy in collagen diseases]. MEDICINA INTERNA 1971; 23:229-37. [PMID: 5549625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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