1
|
Yahav-Shafir D, Kaplan N, Ledot S, Frogel J, Beinart R, Nof E, Zurrof E, Jamal T, Berkenstadt H, Kogan A. APPLICATION OF “FAST-TRACK” PATHWAY FOR VENTRICULAR TACHYCARDIA CATHETER ABLATION. J Cardiothorac Vasc Anesth 2022. [DOI: 10.1053/j.jvca.2022.09.034] [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: 12/05/2022]
|
2
|
Yilmaz I, Akalan H, Karaarslan N, Yasar Sirin D, Kaplan N, Dogan M, Ozbek H, Ates O. Can transcription factors in the intervertebral disc of lopinavir/ritonavir prevent degeneration in the nucleus pulposus by mediating the regulation of inflammation through signaling pathways? EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2022; 26:6845-6855. [PMID: 36196733 DOI: 10.26355/eurrev_202209_29788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
OBJECTIVE This study was conducted to examine whether lopinavir/ritonavir (Lop/r), an HIV protease inhibitor, can improve disc physiology and slow down intervertebral disc (IVD) degeneration through in vitro experimental methods, as well as whether it can suppress inflammation with interleukin-1 beta (IL-1β) and sex-determining region Y (SRY) protein-related high-mobility group box genes-9 (SOX9) through hypoxia-inducible factor 1-alpha (HIF-1α) and the nuclear factor kappa B (NF-κB) signaling pathway. The aim was to investigate whether Lop/r application is toxic to IVD cells and the microenvironment simultaneously. PATIENTS AND METHODS Human primary cell cultures were prepared using herniated IVD tissues obtained from patients with lumbar disc hernia who were unresponsive to conservative and medical treatment, and thereby, were operated on. The untreated culture samples served as control group, and the samples treated with Lop/r served as study group. Microscopic evaluations were performed simultaneously using fluorescent and supravital dyes in all groups. In addition to cell viability, toxicity, and proliferation analysis through a commercial kit, IL-1β, SOX9, HIF-1α, and NF-κB protein expressions were evaluated using Western blotting. In the statistical comparison of the obtained data, an alpha value less than 0.05 was considered significant. RESULTS Cell proliferation decreased in the Lop/r group, but no cell death was observed (p < 0.05). Moreover, at the end of 72 hours after Lop/r application, IL-1β and NF-kB protein expressions decreased by 40% and 52%, respectively, while HIF-1α and SOX9 protein expressions increased by 4% and 59%, respectively (p< 0.05). CONCLUSIONS Although these data were obtained from an in vitro experimental study, it is believed that these findings could make significant contributions to the pharmaco-regenerative treatment modalities of IVD degeneration. Lop/r suppresses the IL-1β and NF-κB and induces SOX9 and HIF-1α, since these signaling pathways may be related to human IVD degeneration.
Collapse
|
3
|
Kim S, Liu H, Kwan K, Im J, Soltani H, Kaplan N, Paller A. 827 Psoriasis exacerbation by obesity reflects reduced adiponectin regulation of PPAR-γ/Th17 pathway activation and is reversal by adiponectin receptor agonism. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Yilmaz I, Akalan H, Yasar Sirin D, Karaarslan N, Kaplan N, Ozbek H. Effects of an acetylcholinesterase inhibitor and an N-methyl-D-aspartate receptor antagonist on inflammation and degeneration of the nucleus pulposus. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2022; 26:4409-4419. [PMID: 35776042 DOI: 10.26355/eurrev_202206_29080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE The study aimed to examine the effects of two drugs, an acetylcholinesterase inhibitor (AChEI) and an N-methyl-D-aspartate receptor (NMDAR) antagonist, on degenerated annulus fibrosus (AF) and nucleus pulposus (NP) cells and the extracellular matrix (ECM) structure in vitro. PATIENTS AND METHODS Tissue samples were obtained from patients with intervertebral disc herniation (four males and four females; classified as Pfirmann stage IV) and used to prepare cell cultures. Untreated cell culture samples served as the control group. Study group samples were treated with donepezil, memantine or a combination of the two drugs. Cell viability, toxicity and proliferation were evaluated in all groups. Western blotting was used to examine changes in protein expression of signal transducer and activator of transcription 3 (STAT3), phospho-STAT3 (ser727), hypoxia-inducible factor (HIF)-1 alpha (HIF-1α) and nucleotide-binding oligomerisation domain (NOD) leucine-rich repeat (LRR)-containing proteins (NLR) family pyrin domain containing 3 (NLRP3) inflammasome. The alpha significance value was < 0.05. RESULTS Analysis of the microscopy and commercial kit results revealed that cell proliferation was suppressed, and no cell death was observed. The protein expression levels of NLRP3, STAT3, ser727 and HIF-1α were lower in the samples treated with donepezil and memantine at 72 h (p < 0.05). The protein expression levels of NLRP3, STAT3, ser727 and HIF-1α were higher in the samples treated with the combination of donepezil and memantine (p < 0.05). CONCLUSIONS The combined administration of memantine a NMDAR antagonist which can prevent neurodegeneration and donepezil an AChEI used for pain relief increased the protein expression levels in the anabolic pathway. However, it did not reduce the protein expression levels in the catabolic pathway. Therefore, further studies are needed to provide extensive insight into whether it may be among the potential targets for the therapy of intervertebral disc (IVD) diseases.
Collapse
|
5
|
Berger AH, Imielinski M, Duke F, Wala J, Kaplan N, Shi GX, Andres DA, Meyerson M. Correction to: Oncogenic RIT1 mutations in lung adenocarcinoma. Oncogene 2022; 41:2788. [PMID: 35418694 PMCID: PMC9828274 DOI: 10.1038/s41388-022-02300-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
6
|
Hauschwitz P, Martan J, Bičišťová R, Beltrami C, Moskal D, Brodsky A, Kaplan N, Mužík J, Štepánková D, Brajer J, Rostohar D, Kopeček J, Prokešová L, Honner M, Lang V, Smrž M, Mocek T. LIPSS-based functional surfaces produced by multi-beam nanostructuring with 2601 beams and real-time thermal processes measurement. Sci Rep 2021; 11:22944. [PMID: 34824322 PMCID: PMC8617047 DOI: 10.1038/s41598-021-02290-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 11/12/2021] [Indexed: 11/09/2022] Open
Abstract
A unique combination of the ultrashort high-energy pulsed laser system with exceptional beam quality and a novel Diffractive Optical Element (DOE) enables simultaneous production of 2601 spots organized in the square-shaped 1 × 1 mm matrix in less than 0.01 ms. By adjusting the laser and processing parameters each spot can contain Laser Induced Periodic Surface Structures (LIPSS, ripples), including high-spatial frequency LIPSS (HFSL) and low-spatial frequency LIPSS (LSFL). DOE placed before galvanometric scanner allows easy integration and stitching of the pattern over larger areas. In addition, the LIPSS formation was monitored for the first time using fast infrared radiometry for verification of real-time quality control possibilities. During the LIPSS fabrication, solidification plateaus were observed after each laser pulse, which enables process control by monitoring heat accumulation or plateau length using a new signal derivation approach. Analysis of solidification plateaus after each laser pulse enabled dynamic calibration of the measurement. Heat accumulation temperatures from 200 to 1000 °C were observed from measurement and compared to the theoretical model. The temperature measurements revealed interesting changes in the physics of the laser ablation process. Moreover, the highest throughput on the area of 40 × 40 mm reached 1910 cm2/min, which is the highest demonstrated throughput of LIPSS nanostructuring, to the best of our knowledge. Thus, showing great potential for the efficient production of LIPSS-based functional surfaces which can be used to improve surface mechanical, biological or optical properties.
Collapse
|
7
|
Peng H, Wang J, Yang W, Kaplan N. 126 EphA2 is a novel regulator of autolysosome recycling at end-stage autophagy and a key regulator in epidermal proliferation. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.145] [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]
|
8
|
Elnasser Z, Elsamarneh R, Obeidat H, Amarin Z, Jaradat S, Kaplan N. In-vitro activity of tigecycline against multidrug-resistant Gram negative bacteria: The experience of a university hospital. J Infect Public Health 2021; 14:478-483. [PMID: 33743369 DOI: 10.1016/j.jiph.2020.12.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 01/04/2023] Open
Abstract
The emergence of multidrug-resistant Gram negative bacteria has given rise to significant therapeutic challenges. These pathogens may have developed resistance to tigecycline, which is an alternative antibiotic used empirically in the treatment of serious infections. The objectives of this study were to identify the in-vitro activity of tigecycline against multidrug-resistant Gram negative strains isolated from clinical specimens and their related genes, at a university hospital. For this, 150 clinical isolates of multidrug-resistant Gram negative cultures from various clinical specimens were collected. Bacterial isolates were cultured, identified and their antibiotic susceptibilities were determined. Polymerase chain reaction was performed to amplify AcrB, AmpC, RamR, MexR, AdeB, TetA genes. Results revealed that all isolates were multidrug-resistant. The resistance of isolates was 91.4% to aztreonam, 94.6% to piperacillin, 34% to imipenem, 38.7% to meropenem, 71.3% to levofloxacin, 97.3% to ceftriaxone, 94.7% to cefepime, 9.3% to colistin, 78% to tetracycline, 21.4% to tigecycline and 68% to trimethoprim. AcrB, AmpC, RamR, MexR, AdeB, TetA genes were present in multidrug-resistant Gram negative bacteria. AcrB, RamR, TetA genes were related to tigecycline resistance. It is concluded that infections caused by multidrug-resistant Gram negative bacteria occur at a high rate. Most isolates were multi drug resistant, with 21.4% being resistant to tigecycline.
Collapse
|
9
|
Kumar P, Murphy Z, Lenz S, Kaplan N, Lyass L, Yang S, Bhatt S, Perez White B. 228 Loss of EPHA2 represses GATA-3 function and causes a terminal differentiation defect. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
10
|
Kaplan N, Leavitt M, Miller J. A-63 The Fatigue Severity Scale and Depression in an Aging Population. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz034.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objective
The Fatigue Severity Scale (FSS) is often used in clinical populations in which fatigue is a common symptom (e.g., multiple sclerosis). Despite the prevalence of fatigue in depression, relatively few investigations have examined the relationship between the FSS and mood symptoms, particularly in aging populations with concerns of memory loss. Thus, the primary aim of the present investigation was to elucidate the relationship between fatigue symptoms and depression among older adults evaluated in a cognitive disorders clinic.
Method
Data were collected as part of a neuropsychological battery administered to patients presenting to clinic due to complaints of memory impairment. Scores on the FSS and the Geriatric Depression Scale (GDS) were collected from 430 patients (48.10% women). Mean age was 74.97 years (SD = 5.81) and 147 subjects were diagnosed with depression, based on a score of 10 or above on the GDS.
Results
We observed a small, but significant inverse relationship between age and scores on the FSS [r = -.103, p = .033], such that older adults endorsed less severe fatigue. A moderate, positive relationship between FSS and GDS was observed [r = .416, p = .000]. Comparing FSS endorsement between depressed and non-depressed individuals finds individuals with depression endorsed significantly greater levels of fatigue than non-depressed individuals, even after accounting for the effects of age [F(1, 427) = 85.79. p < .001; Cohen's d = 0.96].
Conclusion
Present findings suggest that older adults do not necessarily endorse higher rates of fatigue on the FSS. However, the presence of depression in older adults has large effects on fatigue severity.
Collapse
|
11
|
Lavker R, Kaplan N, Peng H. 900 Single cell RNA seq (scRNA-seq) defines early and late epithelial transit amplifying (TA) cells. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
12
|
Peng H, Kaplan N, Yang W, Lavker R. 884 LRRK1 regulates hair follicle (HF) growth via coordinating Wnt and SHH signaling. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
13
|
Cable C, Kaplan N, Balu A, Bhatt S, Sia M, Perez White B. 860 EGFR proteomics reveals novel EphA2-dependent trafficking and signaling pathways in epidermal keratinocytes. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.871] [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]
|
14
|
Xing X, Sarkar M, Tsoi A, Kaplan N, Liang Y, Hoover P, Voorhees J, Nair R, Elder J, Budunova I, Getsios S, Gudjonsson J. 040 Metabolomic profiling of psoriasis skin reveals localized cortisol deficiency resulting in maintenance of inflammatory state and disruption of epidermal differentiation. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
15
|
Abstract
A Bellman–Harris process is considered where the population is subjected to disasters which occur at random times. Each particle alive at the time of a disaster survives it with probability p. In the situation when explosion can occur, several limit theorems are proven. In particular, we prove that the age-distribution converges to the same stable distribution as the Bellman-Harris process and that the population size continues to be asymptotically exponential.
Collapse
|
16
|
Zheng J, Perez White B, Kaplan N, Petty A, Zhao Z, Honda K, Denning M, Blumenberg M, Getsios S, Wang B. 075 Ephrin-A loss in cutaneous squamous cell carcinoma progression and metastasis. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
17
|
Dizmen A, Yazıcı O, Kocer A, Kaplan N, Ertan F. EP-1695: Dosimetric comparison of Helical Tomotherapy and VMAT for endometrial cancer. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32946-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
18
|
Berger AH, Imielinski M, Duke F, Wala J, Kaplan N, Shi GX, Andres DA, Meyerson M. Oncogenic RIT1 mutations in lung adenocarcinoma. Oncogene 2014; 33:4418-23. [PMID: 24469055 PMCID: PMC4150988 DOI: 10.1038/onc.2013.581] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 11/25/2013] [Accepted: 12/03/2013] [Indexed: 12/27/2022]
Abstract
Lung adenocarcinoma is comprised of distinct mutational subtypes characterized by mutually exclusive oncogenic mutations in RTK/RAS pathway members KRAS, EGFR, BRAF and ERBB2, and translocations involving ALK, RET and ROS1. Identification of these oncogenic events has transformed the treatment of lung adenocarcinoma via application of therapies targeted toward specific genetic lesions in stratified patient populations. However, such mutations have been reported in only ∼55% of lung adenocarcinoma cases in the United States, suggesting other mechanisms of malignancy are involved in the remaining cases. Here we report somatic mutations in the small GTPase gene RIT1 in ∼2% of lung adenocarcinoma cases that cluster in a hotspot near the switch II domain of the protein. RIT1 switch II domain mutations are mutually exclusive with all other known lung adenocarcinoma driver mutations. Ectopic expression of mutated RIT1 induces cellular transformation in vitro and in vivo, which can be reversed by combined PI3K and MEK inhibition. These data identify RIT1 as a driver oncogene in a specific subset of lung adenocarcinomas and suggest PI3K and MEK inhibition as a potential therapeutic strategy in RIT1-mutated tumors.
Collapse
|
19
|
Inzelberg R, Cohen OS, Aharon-Peretz J, Schlesinger I, Gershoni-Baruch R, Djaldetti R, Nitsan Z, Ephraty L, Tunkel O, Kozlova E, Inzelberg L, Kaplan N, Fixler Mehr T, Mory A, Dagan E, Schechtman E, Friedman E, Hassin-Baer S. The LRRK2 G2019S mutation is associated with Parkinson disease and concomitant non-skin cancers. Neurology 2012; 78:781-6. [PMID: 22323743 DOI: 10.1212/wnl.0b013e318249f673] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE In view of the fact that cancer patterns in patients with Parkinson disease (PD) differ from the general population, we aimed to verify whether patients with PD with LRRK2 mutations have an increased risk for particular cancer types. METHODS In this cross-sectional study, eligible consenting Jewish patients with PD were genotyped for the predominant LRRK2 G2019S mutation. Oncologic data were obtained by personal interview and reviewing patients' files. Stepwise logistic regression was applied to model the probability of cancer occurrence in carriers vs noncarriers. RESULTS Overall, 79/490 (16.1%) genotyped patients carried the G2019S mutation. Seventy-seven (16%) were diagnosed with cancer; of those, 67 (14%) with a non-skin cancer. Eighteen (23%) carriers vs 49 (12%) noncarriers had a non-skin cancer (p = 0.01, odds ratio [OR] = 2.18, 95% confidence interval [CI] 1.19-3.99). A significant ethnicity effect was noted (p = 0.045, OR = 1.84, 95% CI 1.02-3.34). Among Ashkenazi patients, age and LRRK2 emerged as significant using stepwise logistic regression including age, gender, and LRRK2 status as explanatory variables. The OR for LRRK2 mutation carriers adjusted for age was 3.38 (95% CI 1.64-6.97, p = 0.0009). CONCLUSIONS Ashkenazi Jewish patients with PD who harbor the G2019S LRRK2 mutation are more likely to have a concomitant non-skin cancer than noncarriers.
Collapse
|
20
|
Hassin S, Kaplan N, Cohen O, Vituri A, Inzelberg R, Yahalom G, Nitzan Z, Efraty L, Tunkel O, Friedman E, Rosset S, Korczyn A. 3.051 POLYMORPHISMS IN THE SLC6A3 GENE ENCODING FOR THE DOPAMINE TRANSPORTER ARE ASSOCIATED WITH LEVODOPA-INDUCED DYSKINESIA IN PARKINSON'S DISEASE. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70787-8] [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: 10/14/2022]
|
21
|
Yahalom G, Kaplan N, Vituri A, Cohen O, Inzelberg R, Strauss H, Kozlova E, Orlev Y, Korczyn A, Rosset S, Hassin-Baer S. 3.049 LEVODOPA-INDUCED DYSKINESIA IN PARKINSON'S DISEASE PATIENTS CARRYING THE LEUCINE-RICH REPEAT KINASE 2 (LRRK2) G2019S MUTATION. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70785-4] [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: 11/29/2022]
|
22
|
|
23
|
Feyerherm R, Amato A, Grayevsky A, Gygax FN, Kaplan N, Schenck A. Crystal electric field next to a hydrogen-like interstitial— µ+ in PrNi5. ACTA ACUST UNITED AC 2007. [DOI: 10.1007/s002570050002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
24
|
Nixon A, Allen J, Miller E, Savage S, Kaplan N, Starr M, Bendell J, Uronis H, Fernando N, Hurwitz H. Clinical evaluation of nitric oxide responses to anti-VEGF therapy with bevacizumab. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.14039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
14039 Background: Anti-vascular endothelial growth factor (anti-VEGF) therapy has been linked to hypertension (HTN) and arterial thrombo-embolic events that may involve changes in nitric oxide (NO) bioavailability. Methods: 25 patients (pts) with advanced cancer, normal renal function and blood pressure (BP), no increased risks for anti-VEGF toxicities, and not on medications known to confound biomarker studies (including anti-hypertensives) were treated with bevacizumab (BV) 15mg/kg d1, then 10mg/kg q2 week. Prior to biomarker assessment, all patients were placed on a calorie-, nitrate-, and salt-restricted diet for 72 hr. All measures were taken pre-treatment (preRx) and on day 28 of treatment (onRx). Dependant variables included; a) Brachial artery reactivity (BAR) following hyperemic flow stimulus (endothelium-dependent) and sub-lingual nitroglycerine (NTG; endothelium-independent); b) exhaled and plasma/urine total NO2/NO3 using chemiluminescence (Sievers 280NOA) with either KI or VCl3 in HCl as the reductants; c) blood pressure. Additionally, we measured multiple regulators of vascular tone and injury. Comparisons were analyzed using Spearman signed rank tests. Results: Of 25 pts (16 F, 9 M) treated, 21 patients were fully evaluable. Significant changes or strong trends were observed upon comparing preRx vs. onRx for BP (SBP +12.4, DBP +5.6, MAP +7.9 mm Hg), and flow-mediated BAR (-2.0%) with no changes in hyperemic flow/shear stimulus or smooth muscle function (BAR NTG), indicating a decrease in brachial artery endothelial responsiveness. Exhaled NO decreased (-0.8% d1vs d28 and -0.6% pre/post infusion day1). Measurement and data analysis of urinary/plasma NO2/NO3, as well as angiogenic markers, are almost complete and will be reported. Conclusions: After one month of treatment, BV increased BP and decreased endothelium- dependent BAR and exhaled NO, suggesting potentially broad, mechanism-based effects on NO bioavailability in patients. [Table: see text]
Collapse
|
25
|
Banevicius M, Kaplan N, Vaughan D, Nicolau D. O455 Comparative dose studies of API-1252 and linezolid against hospital-acquired and community-acquired methicillin-resistant Staphylococcus aureus in a murine thigh model. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70303-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|