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A teenage girl with altered mental status and paraparesis. J Clin Tuberc Other Mycobact Dis 2024; 35:100425. [PMID: 38468819 PMCID: PMC10926304 DOI: 10.1016/j.jctube.2024.100425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024] Open
Abstract
A teenage girl presented with fever and altered mental status. MRI showed diffuse leptomeningeal enhancement of the brain and spine. She was diagnosed by a positive cerebrospinal fluid (CSF) culture with tuberculous (TB) meningitis and was started on anti-TB medications and corticosteroids. Her mental status improved, but she was noted to have proximal weakness of the lower extremities. In the course of tapering corticosteroids at week 11 of anti-TB therapy, she became acutely confused and febrile. MRI demonstrated interval development of tuberculomas in the brain and a mass lesion in the thoracic spine causing cord compression. Given the clinical picture was suggestive of a paradoxical reaction, the dose of corticosteroids was increased. Infliximab was added when repeat MRI revealed enlargement of the mass lesion in the spine with worsening cord compression. She was successfully tapered off of corticosteroids. Over several months, the patient's motor function recovered fully, and she returned to ambulating without assistance.
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Duration of Effective Tuberculosis Treatment, not Acid-Fast Bacilli (AFB) Smear Status, as the Determinant for Deisolation in Community Settings. Clin Infect Dis 2024:ciae198. [PMID: 38632833 DOI: 10.1093/cid/ciae198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 04/08/2024] [Indexed: 04/19/2024] Open
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Interim Guidance: 4-Month Rifapentine-Moxifloxacin Regimen for the Treatment of Drug-Susceptible Pulmonary Tuberculosis - United States, 2022. MMWR. MORBIDITY AND MORTALITY WEEKLY REPORT 2022; 71:285-289. [PMID: 35202353 DOI: 10.15585/mmwr.mm7108a1] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
On May 5, 2021, CDC's Tuberculosis Trials Consortium and the National Institutes of Health (NIH)-sponsored AIDS Clinical Trials Group (ACTG) published results from a randomized controlled trial indicating that a 4-month regimen containing rifapentine (RPT), moxifloxacin (MOX), isoniazid (INH), and pyrazinamide (PZA) was as effective as the standard 6-month regimen for tuberculosis (TB) treatment (1). On the basis of these findings, CDC recommends the 4-month regimen as a treatment option for U.S. patients aged ≥12 years with drug-susceptible pulmonary TB and provides implementation considerations for this treatment regimen.
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1400. Pretomanid in the Treatment of Patients with Tuberculosis in the United States: the Bedaquiline, Pretomanid and Linezolid (BPaL) Accelerated Monitoring (BAM) Project. Open Forum Infect Dis 2021. [PMCID: PMC8643925 DOI: 10.1093/ofid/ofab466.1592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background In August 2019 the U.S. FDA approved pretomanid as part of a 6-month all-oral BPaL (bedaquiline, pretomanid, and linezolid) regimen for treating pulmonary extensively drug-resistant (XDR) or treatment-intolerant or nonresponsive multidrug-resistant (MDR) tuberculosis (TB). In the study supporting approval, 89% of patients had a favorable outcome, and all reported ≥ 1 adverse event. We describe the reported use of BPaL in the United States. Methods Using the 2020 CDC Report of a Verified Case of Tuberculosis (RVCT) MDR TB supplemental form, TB programs and providers submitted data for patients who began taking BPaL between Aug 1, 2019 and May 1, 2020, for retrospective descriptive analysis. Results Programs and providers reported 17 TB patients aged a mean of 41 years (range 23–76) who received BPaL: 11 (65%) were male; 15 (88%) were non-U.S. born; 15 (88%) had pulmonary TB disease only; two (12%) had both pulmonary and extrapulmonary disease. Of all patients, 16 had Mycobacterium tuberculosis isolated from sputum and 7 (44%) had cavitary disease. The preliminary drug susceptibilities were 8 MDR patterns, 8 pre-XDR, and 1 unreported. Three patients received BPaL as their only treatment; six first received treatment for drug-susceptible TB, and eight received other regimens for MDR TB before BPaL. Eleven (65%) patients had ≥ 1 side effect reported during any TB treatment, including peripheral neuropathy (n=5), depression (n=4), vestibular dysfunction (n=3), and vision changes (n=3). Timing related to specific TB drug use was not reported. Sixteen (94%) patients received less than the approved initial dose of 1200 mg linezolid daily, and 15 (88%) patients underwent monitoring of linezolid exposure. All 16 patients with M. tuberculosis in initial sputa converted to negative culture results within 6 months of starting treatment. At 12 months after BPaL initiation, all patients had completed treatment, without TB recurrences or deaths reported. Conclusion In the early period after FDA approval, most U.S. patients received BPaL off-label with an initial linezolid dose lower than the approved 1200mg yet still achieved good outcomes. Most reported patients underwent some monitoring of linezolid exposure. Monitoring of BPaL use is important and should continue. Disclosures All Authors: No reported disclosures
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PHYSICAL THERAPY AFFECTS ENDOTHELIAL FUNCTION IN LYMPHEDEMA PATIENTS. Lymphology 2021. [DOI: 10.2458/lymph.4663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Lymphedema arises due to a malfunction of the lymphatic system and can lead to massive tissue swelling. Complete decongestive therapy (CDT), consisting of manual lymphatic drainage (MLD) and compression bandaging, is aimed at mobilizing fluid and reducing volume in affected extremities. Lymphatic dysfunction has previously been associated with chronic inflammation processes. We investigated plasma ADMA as an indicator of endothelial function/inflammation before-, during- and after-CDT. Also assessed were vascular function parameters such as carotid-femoral pulse wave velocity (PWVcf), flow-mediated dilatation (FMD) and retinal microvasculature analysis. 13 patients (3 males and 10 females, 57 ± 8 years old (mean ± SD), 167.2 ± 8.3 cm height, 91.0 ± 23.5 kg weight), with lower limb lymphedema were included. Vascular function parameters were assessed on day 1, 2, 7, 14 and 21 of CDT, pre- and post-MLD. ADMA was significantly lower post-MLD (p=0.0064) and tended to reduce over three weeks of therapy (p=0.0506). PWVcf weakly correlated with FMD (r=0.361, p=0.010). PWVcf, FMD and retinal microvasculature analysis did not show changes due to physical therapy. The novel results from this study indicate that lymphedema does not affect endothelial function and lymphedema patients may therefore not have a higher risk of cardiovascular diseases. Our results further suggest that manual lymphatic drainage with or without full CDT could have potentially beneficial effects on endothelial function in lymphedema patients (by reducing ADMA levels), which has not been reported previously.
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HIV-infected adults are predisposed to proatherogenic biochemical changes. Atherosclerosis 2020. [DOI: 10.1016/j.atherosclerosis.2020.10.369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Polysulfone-Gd2Zr2O7 mixed-matrix membranes with superior radiation resistant properties: Fabrication and application of a membrane device for radioactive effluent treatment. CHEMICAL ENGINEERING JOURNAL ADVANCES 2020. [DOI: 10.1016/j.ceja.2020.100006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Tryptic digestion of human serum for proteomic mass spectrometry automated by centrifugal microfluidics. LAB ON A CHIP 2020; 20:2937-2946. [PMID: 32780041 DOI: 10.1039/d0lc00530d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mass spectrometry has become an important analytical tool for protein research studies to identify, characterise and quantify proteins with unmatched sensitivity in a highly parallel manner. When transferred into clinical routine, the cumbersome and error-prone sample preparation workflows present a major bottleneck. In this work, we demonstrate tryptic digestion of human serum that is fully automated by centrifugal microfluidics. The automated workflow comprises denaturation, digestion and acidification. The input sample volume is 1.3 μl only. A triplicate of human serum was digested with the developed microfluidic chip as well as with a manual reference workflow on three consecutive days to assess the performance of our system. After desalting and liquid chromatography tandem mass spectrometry, a total of 604 proteins were identified in the samples digested with the microfluidic chip and 602 proteins with the reference workflow. Protein quantitation was performed using the Hi3 method, yielding a 7.6% lower median intensity CV for automatically digested samples compared to samples digested with the reference workflow. Additionally, 17% more proteins were quantitated with less than 30% CV in the samples from the microfluidic chip, compared to the manual control samples. This improvement can be attributed to the accurate liquid metering with all volume CVs below 1.5% on the microfluidic chip. The presented automation solution is attractive for laboratories in need of robust automation of sample preparation from small volumes as well as for labs with a low or medium throughput that does not allow for large investments in robotic systems.
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Physical therapy affects endothelial function in lymphedema patients. Lymphology 2020; 53:109-117. [PMID: 33350285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lymphedema arises due to a malfunction of the lymphatic system and can lead to massive tissue swelling. Complete decongestive therapy (CDT), consisting of manual lymphatic drainage (MLD) and compression bandaging, is aimed at mobilizing fluid and reducing volume in affected extremities. Lymphatic dysfunction has previously been associated with chronic inflammation processes. We investigated plasma ADMA as an indicator of endothelial function/inflammation before-, during- and after-CDT. Also assessed were vascular function parameters such as carotid-femoral pulse wave velocity (PWVcf), flow-mediated dilata-tion (FMD) and retinal microvasculature analysis. 13 patients (3 males and 10 females, 57 ± 8 years old (mean ± SD), 167.2 ± 8.3 cm height, 91.0 ± 23.5 kg weight), with lower limb lymphedema were included. Vascular function parameters were assessed on day 1, 2, 7, 14 and 21 of CDT, pre- and post-MLD. ADMA was significantly lower post-MLD (p=0.0064) and tended to reduce over three weeks of therapy (p=0.0506). PWVcf weakly correlated with FMD (r=0.361, p=0.010). PWVcf, FMD and retinal microvasculature analysis did not show changes due to physical therapy. The novel results from this study indicate that lymphedema does not affect endothelial func-tion and lymphedema patients may therefore not have a higher risk of cardiovas-cular diseases. Our results further suggest that manual lymphatic drainage with or without full CDT could have potentially beneficial effects on endothelial function in lymphedema patients (by reducing ADMA levels), which has not been reported previously.
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P5340HIV-infected participants on combination ART (tenofovir, emtricitabine, efavirenz) have improved endothelial function and smaller retinal venular calibers compared to treatment naive participants. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Cumulative data from several studies suggest that HIV-infected populations have a 2-fold increased cardiovascular risk. Evidence is also pointing to a link between HIV and early vascular changes, including endothelial dysfunction and subclinical atherosclerosis. There is a paucity of data from sub-Saharan Africa (the epicenter of the global HIV burden and a region with a rapidly increasing cardiovascular disease [CVD] incidence); furthermore, the contribution of specific combination ART (c-ART) regimens to HIV-related CVD and early vascular changes remain unclear.
Purpose
To investigate the association between HIV-infection, c-ART (TDF+FTC+EFV), CVD risk and vascular markers of CVD in an adult cohort in South Africa.
Methods
Cross-sectional study, participants assigned to 3 groups: HIV-free (HIV−), HIV-infected ART naïve (HIV+/−) and HIV-infected on ART (HIV+/+). Data collection: demographic information, anthropometrics, CVD risk factors, and blood chemistry. Vascular endpoints assessed: brachial artery flow-mediated dilatation (FMD), carotid intima-media thickness (C-IMT) and retinal microvascular calibers.
Results
Cohort size: n=427 (HIV− n=148; HIV+/− n=69; HIV+/+ n=210), mean age: 39.4 years, 68.9% females. Analysis of cardiovascular risk showed no differences in smoking and alcohol consumption, and blood pressure was unaffected by HIV-status. The untreated HIV group had a high % participants with clinically low HDL-cholesterol levels, whereas c-ART seemed to reduce the prevalence (HIV+/−: 58% vs 31% in HIV− and 26% in HIV+/+; p<0.01). Prevalence of hyper-LDL-cholesterolemia and hypertriglyceridemia were similar. High sensitivity CRP levels were unaffected by HIV-status. Markers of end-organ damage showed renal involvement in the HIV+ groups (median regression of urine albumin-creatinine ratio in HIV+/+ and HIV+/− vs HIV−: Beta±SEM: 0.5±0.3 and 0.8±0.2 in HIV+/+ and HIV+/− respectively, p=0.02; adjusted for age, gender and ethnicity), as well as hepatic injury in the treated group (gamma-GT in HIV+/+ vs HIV−: Beta±SEM: 23.3±4.4, p<0.01, adjustment as above). Multiple regression of vascular markers showed increased FMD in HIV+/+ vs HIV+/− (Beta±SEM: 1.8±0.8, p=0.01; adjusted for age, gender, ethnicity and BMI), and decreased central retinal venular equivalent (CRVE) in HIV+/+ vs HIV+/− (Beta±SEM: −11.9±3.8, p=0.002) and vs HIV− (Beta±SEM: −7.1±3.2, p=0.03), adjustment as above. Carotid IMT was not affected by HIV or treatment status.
Conclusions
Combination ART consisting of TDF+FTC+EFV conferred vascular protection in HIV-infected participants as shown by improved endothelial function (increased FMD) and smaller CRVE compared to ART naïve counterparts. There was no evidence of subclinical atherosclerosis involvement (C-IMT). The vasculoprotective effects in the treated group were supported by a favourable HDL-cholesterol profile, despite unchanged inflammation (hs-CRP), and evidence of renal and hepatic impairment.
Acknowledgement/Funding
Dept of Science and Technology (South Africa); National Research Foundation (South Africa); Belgian Science Policy, Belgium; Austrian Grants Agency.
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Sex differences in cardiovascular responses to orthostatic challenge in healthy older persons: A pilot study. Physiol Int 2019; 106:236-249. [DOI: 10.1556/2060.106.2019.16] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Background
Premenopausal women show a higher incidence of orthostatic hypotension than age-matched men, but there are limited data available on sex differences in cardiovascular responses to orthostatic challenge in healthy older persons. We investigated sex differences in hemodynamic and autonomic responses to orthostatic challenge in healthy older males and females.
Materials and methods
Fourteen older healthy women and 10 age-matched men performed a sit-to-stand test (5 min of sitting followed by 5 min of standing). A Task Force® Monitor continuously measured the following beat-to-beat hemodynamic parameters: heart rate, systolic blood pressure, diastolic blood pressure, mean blood pressure, stroke index, cardiac index, and total peripheral resistance index. Cardiac autonomic activity, low-frequency (LF: 0.04–0.15 Hz) normalized (LFnuRRI) and high-frequency (HF: 0.15–0.4 Hz) normalized (HFnuRRI) components, and the ratio between LF and HF power (LF/HF) were calculated using power spectral analysis of heart rate variability.
Results
Across all hemodynamic parameters, there were no significant differences between the sexes at baseline and during standing. LFnuRRI (median: 70.2 vs. 52.3, p < 0.05) and LF/HF ratio (median: 2.4 vs. 1.1, p < 0.05) were significantly higher, whereas HFnuRRI (median: 29.8 vs. 47.7, p < 0.05) was lower among women at baseline. All other heart rate variability measures did not differ between the sexes.
Conclusions
The data indicate that older women showed higher sympathetic and lower parasympathetic activity at rest compared to age-matched men. These results are contradictory to the observations from previous studies, which showed a reduced sympathetic and enhanced parasympathetic activity in women in all ages. Further studies are required to determine the underlying mechanisms contributing to higher incidence of orthostatic hypotension in older females.
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Introduction and evaluation of multidrug-resistant tuberculosis supplemental surveillance in the United States. J Clin Tuberc Other Mycobact Dis 2019; 15:100090. [PMID: 31720417 PMCID: PMC6830138 DOI: 10.1016/j.jctube.2019.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The current tuberculosis (TB) case reporting system for the United States, the Report of Verified Case of TB (RVCT), has minimal capture of multidrug-resistant (MDR) TB treatment and adverse events. Data were abstracted in five states using the form for 13 MDR TB patients during 2012-2015. The Centers for Disease Control and Prevention Guidelines for Evaluating Public Health Surveillance Systems were used to evaluate attributes of the form. Unstructured interviews with pilot sites and stakeholders provided qualitative feedback. The form was acceptable, simple, stable, representative, and provided high-quality data but was not flexible or timely. For the 13 patients on whom data were collected, the median duration of treatment with an injectable medication was 216 days (IQR 203-252). Six (46%) patients reported a side effect requiring a medication change and eight (62%) had a side effect present at treatment completion. A standardized MDR TB supplemental surveillance form was well received by stakeholders whose feedback was critical to making modifications. The finalized form will be implemented nationally in 2020 and will provide MDR TB treatment and morbidity data in the United States to help ensure patients with MDR TB receive the most effective treatment regimens with the least toxic drugs.
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Determinants of endothelial function in a cohort of HIV-infected and HIV-free participants: The role of cardiovascular risk factors, biomarkers of inflammation and HIV-dependent parameters. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Building Bridges for Innovation in Ageing: Synergies between Action Groups of the EIP on AHA. J Nutr Health Aging 2017; 21:92-104. [PMID: 27999855 DOI: 10.1007/s12603-016-0803-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 04/12/2016] [Indexed: 01/08/2023]
Abstract
The Strategic Implementation Plan of the European Innovation Partnership on Active and Healthy Ageing (EIP on AHA) proposed six Action Groups. After almost three years of activity, many achievements have been obtained through commitments or collaborative work of the Action Groups. However, they have often worked in silos and, consequently, synergies between Action Groups have been proposed to strengthen the triple win of the EIP on AHA. The paper presents the methodology and current status of the Task Force on EIP on AHA synergies. Synergies are in line with the Action Groups' new Renovated Action Plan (2016-2018) to ensure that their future objectives are coherent and fully connected. The outcomes and impact of synergies are using the Monitoring and Assessment Framework for the EIP on AHA (MAFEIP). Eight proposals for synergies have been approved by the Task Force: Five cross-cutting synergies which can be used for all current and future synergies as they consider overarching domains (appropriate polypharmacy, citizen empowerment, teaching and coaching on AHA, deployment of synergies to EU regions, Responsible Research and Innovation), and three cross-cutting synergies focussing on current Action Group activities (falls, frailty, integrated care and chronic respiratory diseases).
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Effect of Aspalathus Linearis (Rooibos) Supplementation on the Heart and Aortas of Male Wistar Rats Exposed to Antiretroviral Therapy (ART) and the Effects of Rooibos Tea Consumption on the Cardiovascular Risk Profile of Patients on ART. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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A comprehensive fracture prevention strategy in older adults: The European union geriatric medicine society (EUGMS) statement. Eur Geriatr Med 2016. [DOI: 10.1016/j.eurger.2016.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Erratum to: Building bridges for innovation in ageing: Synergies between action groups of the EIP on AHA. J Nutr Health Aging 2016. [DOI: 10.1007/s12603-016-0850-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Engaging homeless service providers in educational efforts during a tuberculosis outbreak in Atlanta. JOURNAL OF THE GEORGIA PUBLIC HEALTH ASSOCIATION 2016. [DOI: 10.21633/jgpha.6.2s14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Static and dynamic retinal vessel analyses in patients with stroke as compared to healthy control subjects. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Poster session 2Morphogenetic mechanisms290MiR-133 regulates retinoic acid pathway during early cardiac chamber specification291Bmp2 regulates atrial differentiation through miR-130 during early heart looping formationDevelopmental genetics294Association of deletion allele of insertion/deletion polymorphism in alpha 2B adrenoceptor gene and hypertension with or without type 2 diabetes mellitus295Association of G1359A polymorphism of the endocannabinoid type 1 receptor (CNR1) with coronary artery disease (CAD) with type 2 diabetes mellitusCell growth, differentiation and stem cells - Vascular298Gamma-secretase inhibitor prevents proliferation and migration of ductus arteriosus smooth muscle cells: a role of Notch signaling in postnatal closure of ductus arteriosus299Mesenchymal stromal-like cells (MLCs) derived from induced pluripotent stem (iPS) cells: a promising therapeutic option to promote neovascularization300Sonic Hedgehog promotes mesenchymal stem cell differentiation to vascular smooth muscle cells in cardiovacsular disease301Proinflammatory cytokine secretion and epigenetic modification in endothelial cells treated LPS-GinfivalisCell death and apoptosis - Vascular304Mitophagy acts as a safeguard mechanism against human vascular smooth muscle cell apoptosis induced by atherogenic lipidsTranscriptional control and RNA species - Vascular307MicroRNA-34a role in vascular calcification308Local delivery of a miR-146a inhibitor utilizing a clinically applicable approach attenuates neointima formation after vascular injury309Long noncoding RNA landscape of hypoxic endothelial cells310Specific circulating microRNAs levels associate with hypertension, hyperglycemia and dysfunctional HDL in acute coronary syndrome patientsCytokines and cellular inflammation - Vascular313Phosphodiesterase5A up-regulation in vascular endothelium under pro-inflammatory conditions: a newly disclosed anti-inflammatory activity for the omega-3polyunsaturated aatty acid docosahexaenoic acid314Cardiovascular risk modifying with extra-low dose anticytokine drugs in rhematoid arthritis315Conversion of human M-CSF macrophages into foam cells reduces their proinflammatory responses to classical M1-polarizing activation316Lymphocytic myocarditis coincides with increased plaque inflammation and plaque hemorrhage in coronary arteries, facilitating myocardial infarction317Serum osteoprotegerin level predictsdeclined numerous of circulating endothelial- derived and mononuclear-derived progenitor cells in patients with metabolic syndromeGrowth factors and neurohormones - Vascular320Effect of gastrin-releasing peptide (GRP) on vascular inflammationSignal transduction - Heart323A new synthetic peptide regulates hypertrophy in vitro through means of the inhibition of nfkb324Inducible fibroblast-specific knockout of p38 alpha map kinase is cardioprotective in a mouse model of isoproterenol-induced cardiac hypertrophy325Regulation of beta-adrenoceptor-evoked inotropic responses by inhibitory G protein, adenylyl cyclase isoforms 5 and 6 and phosphodiesterases326Binding to RGS3 and stimulation of M2 muscarinic acetylcholine receptors modulates the substrate specificity of p190RhoGAP in cardiac myocytes327Cardiac regulation of post-translational modifications, parylation and deacetylation in LMNA dilated cardiomyopathy mouse model328Beta-adrenergic regulation of the b56delta/pp2a holoenzyme in cardiac myocytes through b56delta phosphorylation at serine 573Nitric oxide and reactive oxygen species - Vascular331Oxidative stress-induced miR-200c disrupts the regulatory loop among SIRT1, FOXO1 and eNOS332Antioxidant therapy prevents oxidative stress-induced endothelial dysfunction and Enhances Wound Healing333Morphological and biochemical characterization of red blood cell in coronary artery diseaseCytoskeleton and mechanotransduction - Heart336Novel myosin activator, JSH compounds, increased myocardial contractility without chronotropic effect in ratsExtracellular matrix and fibrosis - Vascular339Ablation of Toll-like receptor 9 causes cardiac rupture after myocardial infarction by attenuating proliferation and differentiation of cardiac fibroblasts340Altered vascular remodeling in the mouse hind limb ischemia model in Factor VII activating protease (FSAP) deficiencyVasculogenesis, angiogenesis and arteriogenesis343Pro-angiogenic effects of proly-hydroxylase inhibitors and their potential for use in a novel strategy of therapeutic angiogenesis for coronary total occlusion344Nrf2 drives angiogenesis in transcription-independent manner: new function of the master regulator of oxidative stress response345Angiogenic gene therapy, despite efficient vascular growth, is not able to improve muscle function in normoxic or chronically ischemic rabbit hindlimbs -role of capillary arterialization and shunting346Effect of PAR-1 inhibition on collateral vessel growth in the murine hind limb model347Quaking is a key regulator of endothelial cell differentiation, neovascularization and angiogenesis348"Emerging angiogenesis" in the chick chorioallantoic membrane (CAM). An in vivo study349Exosomes from cardiomyocyte progenitor cells and mesenchymal stem cells stimulate angiogenesis in vitro and in vivo via EMMPRINEndothelium352Reciprocal regulation of GRK2 and bradykinin receptor stimulation modulate Ca2+ intracellular level in endothelial cells353The roles of bone morphogenetic proteins 9 and 10 in endothelial inflammation and atherosclerosis354The contribution of GPR55 to the L-alpha-lysophosphatidylinositol-induced vasorelaxation in isolated human pulmonary arteries355The endothelial protective ACE inhibitor Zofenoprilat exerts anti-inflammatory activities through H2S production356A new class of glycomimetic drugs to prevent free fatty acid-induced endothelial dysfunction357Endothelial progenitor cells to apoptotic endothelial cell-derived microparticles ration differentiatesas preserved from reduced ejection fractionheart failure358Proosteogenic genes are activated in endothelial cells of patients with thoracic aortic aneurysm359Endothelin ETB receptors mediate relaxing responses to insulin in pericardial resistance arteries from patients with cardiovascular disease (CVD)Smooth muscle and pericytes362CX3CR1 positive myeloid cells regulate vascular smooth muscle tone by inducing calcium oscillations via activation of IP3 receptors363A novel function of PI3Kg on cAMP regulation, role in arterial wall hyperplasia through modulation of smooth muscle cells proliferation364NRP1 and NRP2 play important roles in the development of neointimal hyperplasia in vivo365Azithromycin induces autophagy in aortic smooth muscle cellsCoagulation, thrombosis and platelets368The real time in vivo evaluation of platelet-dependent aldosterone prothrombotic action in mice369Development of a method for in vivo detection of active thrombi in mice370The antiplatelet effects of structural analogs of the taurine chloramine371The influence of heparin anticoagulant drugs on functional state of human platelets372Regulation of platelet aggregation and adenosine diphosphate release by d dimer in acute coronary syndrome (in vitro study)Oxygen sensing, ischaemia and reperfusion375Sirtuin 5 mediates brain injury in a mouse model of cerebral ischemia-reperfusion376Abscisic acid: a new player in cardiomyocyte protection from ischaemia?377Protective effects of ultramicronized palmitoylethanolamide (PEA-um) in myocardial ischaemia and reperfusion injury in vivo378Identification of stem cell-derived cardiomyocytes using cardiac specific markers and additional testing of these cells in simulated ischemia/reperfusion system379Single-dose intravenous metformin treatment could afford significant protection of the injured rat kidney in an experimental model of ischemia-reperfusion380Cardiotoxicity of long acting muscarinic receptor antagonists used for chronic obstructive pulmonary disease381Dependence antioxidant potential on the concentration of amino acids382The impact of ischemia-reperfusion on physiological parameters,apoptosis and ultrastructure of rabbit myocardium with experimental aterosclerosisMitochondria and energetics385MicroRNA-1 dependent regulation of mitochondrial calcium uniporter (MCU) in normal and hypertrophied hearts386Mitochondrial homeostasis and cardioprotection: common targets for desmin and aB-crystallin387Overexpression of mitofusin-2 (Mfn2) and associated mitochondrial dysfunction in the diabetic heart388NO-dependent prevention of permeability transition pore (MPTP) opening by H2S and its regulation of Ca2+ accumulation in rat heart mitochondria389G protein coupled receptor kinase 2 (GRK2) is fundamental in recovering mitochondrial morphology and function after exposure to ionizing radiation (IR)Gender issues392Sex differences in pulmonary vascular control; focus on the nitric oxide pathwayAging395Heart failure with preserved ejection fraction develops when feeding western diet to senescence-accelerated mice396Cardiovascular markers as predictors of cognitive decline in elderly hypertensive patients397Changes in connexin43 in old rats with volume overload chronic heart failureGenetics and epigenetics400Calcium content in the aortic valve is associated with 1G>2G matrix metalloproteinase 1 polymorphism401Neuropeptide receptor gene s (NPSR1) polymorphism and sleep disturbances402Endothelin-1 gene Lys198Asn polymorphism in men with essential hypertension complicated and uncomplicated with chronic heart failure403Association of common polymorphisms of the lipoprotein lipase and pon1 genes with the metabolic syndrome in a sample of community participantsGenomics, proteomics, metabolomics, lipidomics and glycomics405Gene expression quantification using multiplexed color-coded probe pairs to determine RNA content in sporadic cardiac myxoma406Large-scale phosphorylation study of the type 2 diabetic heart subjected to ischemia / reperfusion injury407Transcriptome-based identification of new anti-inflammatory properties of the olive oil hydroxytyrosol in vascular endothelial cell under basal and proinflammatory conditions408Gene polymorphisms combinations and risk of myocardial infarctionComputer modelling, bioinformatics and big data411Comparison of the repolarization reserve in three state-of-the-art models of the human ventricular action potentialMetabolism, diabetes mellitus and obesity414Endothelial monocyte-activating polypeptide-II improves heart function in type -I Diabetes mellitus415Admission glucose level is independent predictor of impaired left ventricular function in patients with acute myocardial infarction: a two dimensional speckle-tracking echocardiography study416Association between biochemical markers of lipid profile and inflammatory reaction and stiffness of the vascular wall in hypertensive patients with abdominal obesity417Multiple common co-morbidities produce left ventricular diastolic dysfunction associated with coronary microvascular dysfunction, oxidative stress and myocardial stiffening418Investigating the cardiovascular effects of antiretroviral drugs in a lean and high fat/sucrose diet rat model of obesity419Statins in the treatment of non-alcoholic steatohepatitis (NASH). Our experience from a 2-year prospective study in Constanta County, Romania420Epicardial adipose tissue as a predictor of cardiovascular outcome in patients with ACS undergoing PCI?Arterial and pulmonary hypertension423Dependence between heart rhythm disorers and ID polymorphism of ACE gene in hypertensive patients424Molecular mechanisms underlying the beneficial effects of Urocortin 2 in pulmonary arterial hypertension425Inhibition of TGf-b axis and action of renin-angiotensin system in human ascending aorta aneurysms426Early signs of microcirculation and macrocirculation abnormalities in prehypertension427Vascular smooth muscle cell-expressed Tie-2 controls vascular tone428Cardiac and vascular remodelling in the development of chronic thrombo-embolic pulmonary hypertension in a novel swine modelBiomarkers431Arrhythmogenic cardiomyopathy: a new, non invasive biomarker432Can circulating microRNAs distinguish type 1 and type 2 myocardial infarction?433Design of a high-throughput multiplex proteomics assay to identify left ventricular diastolic dysfunction in diabetes434Monocyte-derived and P-selectin-carrying microparticles are differently modified by a low fat diet in patients with cardiovascular risk factors who will and who will not develop a cardiovascular event435Red blood cell distribution width assessment by polychromatic interference microscopy of thin films in chronic heart failure436Invasive and noninvasive evaluation of quality of radiofrequency-induced cardiac denervation in patients with atrial fibrillation437The effect of therapeutic hypothermia on the level of brain derived neurotrophic factor (BDNF) in sera following cardiopulmonary resustitation438Novel biomarkers to predict outcome in patients with heart failure and severe aortic stenosis439Biological factors linking depression and anxiety to cardiovascular disease440Troponins and myoglobin dynamic at coronary arteries graftingInvasive, non-invasive and molecular imaging443Diet composition effects on the genetic typing of the mouse ob mutation: a micro-ultrasound characterization of cardiac function, macro and micro circulation and liver steatosis444Characterization of pig coronary and rabbit aortic lesions using IV-OCT quantitative analysis: correlations with histologyGene therapy and cell therapy447Enhancing the survival and angiogenic potential of mouse atrial mesenchymal cells448VCAM-1 expression in experimental myocardial infarction and its relation to bone marrow-derived mononuclear cell retentionTissue engineering451Advanced multi layered scaffold that increases the maturity of stem cell-derived human cardiomyocytes452Response of engineered heart tissue to simulated ischemia/reperfusion in the presence of acute hyperglycemic conditions453Serum albumin hydrogels prevent de-differentiation of neonatal cardiomyocytes454A novel paintbrush technique for transfer of low viscosity ultraviolet light curable cyan methacrylate on saline immersed in-vitro sheep heart. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Polyaniline/SnO2 Nanocomposite Sensor for NO2 Gas Sensing at Low Operating Temperature. INTERNATIONAL JOURNAL OF NANOSCIENCE 2015. [DOI: 10.1142/s0219581x15500118] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this paper gas sensing properties of 0.5–3% polyaniline (PAni) doped SnO 2 thin films sensors prepared by chemical route have been studied towards the trace level detection of NO 2 gas. The structural, optical and surface morphological properties of the PAni doped SnO 2 thin films were investigated by performing X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Raman spectroscopy measurements. A good correlation has been identified between the microstructural and gas sensing properties of these prepared sensors. Out of these films, 1% PAni doped SnO 2 sensor showed high sensitivity towards NO 2 gas along with a sensitivity of 3.01 × 102 at 40°C for 10 ppm of gas. On exposure to NO 2 gas, resistance of all sensors increased to a large extent, even greater than three orders of magnitude. These changes in resistance upon removal of NO 2 gas are found to be reversible in nature and the prepared composite film sensors showed good sensitivity with relatively faster response/recovery speeds.
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Use of flow mediated dilatation to assess endothelial function in a female cohort of mixed ancestry in Cape Town, South Africa. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
We report the evolution and confinement of atomically precise and luminescent gold clusters in a small protein, lysozyme (Lyz) using detailed mass spectrometric (MS) and other spectroscopic investigations. A maximum of 12 Au(0) species could be bound to a single Lyz molecule irrespective of the molar ratio of Lyz : Au(3+) used for cluster growth. The cluster-encapsulated protein also forms aggregates similar to the parent protein. Time dependent studies reveal the emergence of free protein and the redistribution of detached Au atoms, at specific Lyz to Au(3+) molar ratios, as a function of incubation time, proposing inter-protein metal ion transfer. The results are in agreement with the studies of inter-protein metal transfer during cluster growth in similar systems. We believe that this study provides new insights into the growth of clusters in smaller proteins.
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Abstract
We report the synthesis of luminescent AuAg alloy quantum clusters (QCs) in bovine serum albumin (BSA), for the first time, with experimentally determined atomic composition. Mixing of the as-synthesized protein-protected Au and Ag clusters resulted in the formation of alloy AuAg clusters within the BSA. Mass spectrometric analysis of the product of a 1 : 1 molar ratio reaction mixture of Au(QC)@BSA and Ag(QC)@BSA suggested that the alloy clusters could be Au(38-x)Ag(x)@BSA. Further analyses by standard techniques revealed that the alloy cluster core of ∼1.2 nm diameter is composed of nearly zero valent Au and Ag atoms that exhibit distinctly different steady state and time resolved excited state luminescence profiles compared to the parent clusters. Tuning of the alloy composition was achieved by varying the molar ratio of the parent species in the reaction mixture and compositional changes were observed by mass spectrometry. In another approach, mixing of Au(3+) ions with the as-synthesized Ag(QC)@BSA also resulted in the formation of alloy clusters through galvanic exchange reactions. We believe that alloy clusters with the combined properties of the constituents in versatile protein templates would have potential applications in the future. The work presents interesting aspects of the reactivity of the protein-protected clusters.
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Paradoxical clearance of hyaluronan fragments during haemodialysis and haemodiafiltration. Nephrol Dial Transplant 2012; 27:4420-2. [DOI: 10.1093/ndt/gfs266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Clinical scoring for risk of resistant organisms in pneumonia: right idea, wrong interpretation. Clin Infect Dis 2012; 55:749-50. [PMID: 22670045 DOI: 10.1093/cid/cis532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Advances on the research on nonlinear phenomena in boiling natural circulation loop. PROGRESS IN NUCLEAR ENERGY 2011. [DOI: 10.1016/j.pnucene.2011.04.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract: P763 CARDIOVASCULAR LDL GOAL ATTAINMENT IN A LARGE RURAL SETTING. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70919-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
We investigated non-invasively cardiac contractility and autonomic nervous activity during presyncopal orthostatic stress induced in healthy humans. A graded orthostatic stress (GOS) paradigm, consisting of head-up tilt (HUT) combined with lower body negative pressure (LBNP) of increasing magnitude, was used to reach a presyncopal end-point in 15 healthy adults. Continuous beat-to-beat hemodynamic and autonomic parameters were recorded. From supine control (C1) to presyncope (PS), total peripheral resistance index (TPRI) decreased from 2300+/-500 to 1910+/-320 dyne*s*m(2)/cm(5) (p=0.004), index of contractility (IC) from 59+/-14 to 27+/-6 1000/s (p<0.0001), left ventricular working index (LVWI) from 5.2+/-1.3 vs. 3.6+/-0.6 mmHg*L/(min*m(2)) (p=0.0001) and acceleration index (ACI) from 65+/-18 vs. 54+/-15 100/s(2) (p=0.04). Low frequency variation of diastolic blood pressure (LF(nu)dBP) increased from 51+/-14 to 67+/-11 % (p=0.0006) and of systolic blood pressure (LF(nu)sBP) from 50+/-6 vs. 67+/-8 % (p<0.0001). High frequency variation of RR-interval (HF(ms(2))RRI) decreased from 385+/-320 to 38+/-43 ms(2) (p=0.001). From late GOS (G3) to PS, TPRI decreased from 2540+/-640 to 1910+/-320 dyne*s*m(2)/cm(5) (p=0.003), IC from 35+/-6 to 27+/-6 1000/s (p=0.003), LVWI from 4.6+/-0.9 to 3.6+/-0.6 mmHg*L/(min/m(2)) (p=0.003), LF(nu)sBP from 71+/-8 to 67+/-8 % (p=0.03), LF(mmHg(2))dBP from 6.6+/-4.0 to 4.8+/-2.9 mmHg(2) (p=0.0001), LF(mmHg(2))sBP from 9.7+/-7.8 to 7.4+/-4.8 mmHg(2) (p=0.01). HF(nu)RRI increased from 19+/-8 to 28+/-13 % (p=0.008). Myocardial contractility indices and parameters of sympathetic activity were reduced in the presyncopal state, while parasympathic activity was increased. This suggests a decrease in cardiac contractility during orthostatically induced presyncope in healthy subjects.
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The cardiovascular response to lower body negative pressure in humans depends on seal location. Physiol Res 2008; 58:311-318. [PMID: 18637716 DOI: 10.33549/physiolres.931431] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
We tested whether seal location at iliac crest (IC) or upper abdomen (UA), before and during lower body negative pressure (LBNP), would affect thoracic electrical impedance, hepatic blood flow, and central cardiovascular responses to LBNP. After 30 min of supine rest, LBNP at -40 mm Hg was applied for 15 min, either at IC or UA, in 14 healthy males. Plasma density and indocyanine green concentrations assessed plasma volume changes and hepatic perfusion. With both sealing types, LBNP-induced effects remained unchanged for mean arterial pressure (-3.0+/-1.1 mm Hg), cardiac output (-1.0 l min(-1)), and plasma volume (-11 %). Heart rate was greater during UA (80.6+/-3.3 bpm) than IC (76.0+/-2.5 bpm) (p<0.01) and thoracic impedance increased more using UA (3.2+/-0.2 Omega) than IC (1.8+/-0.2 Omega) (p<0.0001). Furthermore, during supine rest, UA was accompanied by lower thoracic impedance (26.9+/-1.1 vs 29.0+/-0.8 Omega, p<0.001) and hepatic perfusion (1.6 vs 1.8 l.min(-1), p<0.05) compared to IC. The data suggest that the reduction in central blood volume in response to LBNP depends on location of the applied seal. The sealing in itself altered blood volume distribution and hepatic perfusion in supine resting humans. Finally, application of LBNP with the seal at the upper abdomen induced a markedly larger reduction in central blood volume and greater increases in heart rate than when the seal was located at the iliac crest.
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Kinetic studies on the catalytic reduction of o-, m-, and p-nitrophenols by hydrazine. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/jctb.5040340502] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Dihydrobis(4-cyano-3-phenylpyrazol-1-yl)borate: homoleptic mononuclear cobalt(II) and copper(II) complexes with a cyano-substituted scorpionate ligand. Inorg Chem 2001; 40:4081-4. [PMID: 11466073 DOI: 10.1021/ic010316n] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Product development studies for stabilization of oral liquid enzyme preparations containing diastase and papain. BOLLETTINO CHIMICO FARMACEUTICO 2001; 140:76-8. [PMID: 11417390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
A product development study was undertaken with a view to stabilize acid sensitive amylolytic enzyme diastase and alkali sensitive proteolytic enzyme papain. An unique high technology method was adopted for both enzymes with enteric coating and non-enteric film forming materials respectively to achieve site specificity of action, better stability and to protect diastase from the adverse acid pH of the stomach. Feasibility of incorporating various excipients like thickening agents, surfactants, preservatives, etc., to produce stable elegant oral liquid suspension was also studied. Release studies of the enzymes both in simulated gastric and simulated intestinal juices showed steady and consistent release. The proteolytic and amylolytic activities were assessed by standard pharmacopoeial methods. The stability of the product during the studies was satisfactory. Reduction in addition of overages of costly enzymes met the project technically feasible and economically viable.
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Preparation and in vitro dissolution of isoniazid from ethylcellulose microcapsules. ACTA POLONIAE PHARMACEUTICA 2001; 58:65-8. [PMID: 11370290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Microcapsules of isoniazid were prepared by phase separation coacervation process induced by non-solvent addition and using ethylcellulose (EC) as coating polymer. When polyisobutylene (PIB)--a protective colloid was present at sufficient concentration, film coated drug particles were formed. At 0-6% PIB concentration, the microcapsules were aggregated. Increase of colloid concentration produced microcapsules of less aggregation and higher drug content because coating became progressively thinner. PIB concentration also controlled the particle size and the release rate of drug from microcapsules. Wall thickness and EC loss were calculated from drug content. Microcapsules coated with EC were prepared with 7-9% PIB. Scanning Electron Microscopy was used to study the nature of aggregation and coating behaviour. The in vitro dissolution study confirmed the first order release pattern and also the Higuchi Matrix model.
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Synthesis and Luminescence Properties of a Nonsymmetrical Ligand-Bridged ReI−ReI Chromophore. Inorg Chem 2000. [DOI: 10.1021/ic000134d] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Structure, physical, and photophysical properties of platinum(II) complexes containing bidentate aromatic and bis(diphenylphosphino)methane as ligands. Inorg Chem 2000; 39:1955-63. [PMID: 11434320 DOI: 10.1021/ic991306d] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study focuses on a series of PtII(L-L')(dppm)n+ complexes, where dppm is bis(diphenylphosphino)methane and L-L' are C-C' (n = 0), C-N (n = 1), and N-N' (n = 2) aromatic ligands. Structural characteristics are as follows: for [Pt(phen)(dppm)](PF6)2, a N-N' derivative, monoclinic, C2/c, a = 33.583(6) A, b = 11.399(2) A, c = 22.158(4) A, Z = 8; for [Pt(phq)(dppm)](PF6), a C-N derivative, triclinic, P1, a = 11.415(3) A, b = 13.450(3) A, c = 14.210(4) A, Z = 2; for [Pt(phpy)(dppm)](PF6), a C-N derivative, triclinic, P1, a = 10.030(3) A, b = 13.010(2) A, c = 15.066(4) A, Z = 2; and for [Pt(bph)(dppm)], a C-C' derivative, P2(1)/c, a = 17.116(7) A, b = 21.422(6) A, c = 26.528(6) A, Z = 12, where phen is 1,10-phenanthroline, phq is 2-phenylquinoline, phpy is 2-phenylpyridine, and bph is 2,2'-biphenyl. Structural features indicate that the Pt-C bond distance is shorter than the Pt-N bond distance in symmetrical complexes and that the Pt-P bond distance trans to N is shorter than the Pt-P bond trans to C. This is consistent with the 31P NMR spectra where the chemical shift of the P trans to C is approximately 10 ppm less than found for P trans to N. The energy maxima of the metal-to-ligand charge-transfer band for the complexes containing various L-L' ligands occur in the near-UV region of the spectrum and fall into the energy series bpy > bph > phen > 2-phpy > 2-ptpy > 2-phq > 7,8-bzq, where bpy is 2,2'-bipyridine, 2-phpy is 2-phenylpyridine, 2-ptpy is 2-p-tolylpyridine, and 7,8-bzq is 7,8-benzoquinoline. The emission energy maxima, ascribed to variance in metal-perturbed triplet ligand centered emission, commence near 500 nm and follow the series phen > bpy > 7,8-bzq > 2-phpy > 2-ptpy > bph > 2-phq. In general, emission is observed at 77 K and in solution at low temperatures, but the temperature dependence of the emission lifetimes indicates thermal activation to another state occurs with an energy of approximately 1800 cm-1 for the complexes, with the exception of [Pt(bph)(dppm)], which has an activation energy of approximately 2300 cm-1.
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Abstract
105Rhodium(III) complexes with three different acyclic tetrathioether ligands containing pendant carboxylic acid groups have been synthesized and characterized. The complexes were evaluated for stability under physiological conditions and the most promising complexes were evaluated in vivo in normal mice. The primary route of clearance for these complexes was the renal/urinary system, consistent with the presence of pendant carboxylate groups. The results indicate that the cis-[Rh(III)Cl2(2,5,8,11-tetrathiadodecane-1,12-dicarboxylic acid)]+ complex shows the most promising in vivo characteristics on which to base a potential therapeutic radiopharmaceutical.
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Emergency referrals. Stern approach. THE HEALTH SERVICE JOURNAL 1997; 107:28-9. [PMID: 10167056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
A five-year study of a south London health authority's admissions to hospital shows a marked rise in emergency inpatient referrals--with an adverse effect on planned inpatient activity. Jacqueline Mallender and colleagues summarise their findings.
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Study of loss in absorption of X-rays in thin natural diamond crystals around Laue diffraction maxima. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396079822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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An Rh-105 complex of tetrathiacyclohexadecane diol with potential for formulating bifunctional chelates. Nucl Med Biol 1996; 23:33-40. [PMID: 9004912 DOI: 10.1016/0969-8051(95)02012-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
1,5,9,13-Tetrathiacyclohexane-3,11-diol (16S4-diol), a sulfur crown ether analog, was studied as a potential chelating agent to complex no-carrier-added (NCA) grade 105Rh(III) in high yield at low ligand concentrations. trans-[RhCl2(16S4-diol)]chi (chi = Cl, PF6) was prepared using nonradioactive RhCl3.3H2O and characterized by UV-Vis, nuclear magnetic resonance (NMR) and X-ray crystallography. It was shown to have a +1 charge with the Rh(III) metal center coordinated to the four S atoms equatorially and two Cl atoms in trans axial positions. The 105Rh-16S4-diol complex prepared with NCA 105Rh(III)-chloride reagent was found to exhibit identical chromatographic properties as trans-[Rh(III)Cl2(16S4-diol)]+ (including silica and C-18 thin-layer chromatography [TLC] and electrophoresis). The preparation of 105Rh-16S4-diol complex formation optimized for conditions of pH, temperature, time, % ethanol and quantity of 16S4-diol resulted in yields > 90%. Very low quantities of 16S4-diol (3 nmol) complex NCA 105Rh(III) under relatively mild reaction conditions (heating at 64 degrees C for 90 min) in the presence of ethanol (10%), yielded the high specific activity 105Rh-16S4-diol complex as a single cationic species. The 105Rh-16S4-diol complex was shown to be stable for > or = 4 days in physiological buffers at room temperature and in human serum at 37 degrees C.
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Direct observation of diffracted X-ray beam in the forward direction from thin and imperfect natural diamond crystals. Acta Crystallogr A 1993. [DOI: 10.1107/s0108767378089187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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A quantitative study of diffracted X-ray intensities from natural diamond crystals by using multicrystal X-ray diffractometers and comparison with silicon crystals. Acta Crystallogr A 1987. [DOI: 10.1107/s0108767387079820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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A high-resolution X-ray diffractometric and topographic study of electron–lattice interaction during two-dimensional conduction in silicon MOSFETs (klitzing elements). Acta Crystallogr A 1987. [DOI: 10.1107/s0108767387082072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
Kinetics of reduction of p-nitrotoluene by hydrazine in presence of Raney nickel catalyst have been studied spectrophotometrically. It has been found that the reaction is first order with respect to both hydrazine and nitrotoluene. The influence of solvent, salt, and the amount of catalyst on the reaction rate has been investigated. The rate constant was found to depend on the dielectric constant, the ionic strength, and on the catalyst concentration. The activation energy was estimated to be 103.92 kJ mol−1 in 73.58% ethanol in water. This value decreases considerably when the polarity of the solvent increases and when other salts are added. In pure water the value is 32.25 kJ mol−1.
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Topical use of betamethasone-17-benzoate in common dermatological disorders. Indian J Dermatol 1974; 19:46-52. [PMID: 4607695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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