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https://www.readbyqxmd.com/read/28321995/clinical-and-microbiological-efficacy-of-4-garcinia-mangostana-l-pericarp-gel-as-local-drug-delivery-in-the-treatment-of-chronic-periodontitis-a-randomized-controlled-clinical-trial
#1
Jaideep Mahendra, Little Mahendra, Priyadharshini Svedha, Sandhya Cherukuri, Georgios E Romanos
AIM: The aim of the present study was to assess the periodontal status of individuals and the presence of red complex microorganisms (RCM), such as Treponema denticola (Td), Porphyromonas gingivalis, and Tannerella forsythia in the subgingival tissues of periodontitis patients before and after the application of 4% mangostana gel (Garcinia mangostana [MGA]) as an adjunct to scaling and root planing (SRP). METHODS: Twenty-five patients (MGA group) were treated with SRP, and the subgingival application of mangostana gel was used as local drug delivery...
March 20, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28292236/microwave-assisted-olefin-metathesis-as-pivotal-step-in-the-synthesis-of-bioactive-compounds
#2
Koffi Sénam Etsè, Alice Ngendera, Nelly Tshibalonza Ntumba, Albert Demonceau, Lionel Delaude, Ileana Dragutan, Valerian Dragutan
Over the last two decades, olefin metathesis has emerged as a new avenue in the design of new routes for the synthesis of natural products and active pharmaceutical ingredients. In many cases, syntheses based on olefin metathesis strategies provide elegant routes in terms of increasing the overall yields, improving the synthesis scope, and decreasing the number of steps. On the other hand, over the last decade, microwave-assisted chemistry has experienced an incredible development, which rapidly opened new vistas in organic synthesis and in homogeneous catalysis...
March 14, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28289898/comparison-of-dermoscopy-and-reflectance-confocal-microscopy-for-the-diagnosis-of-malignant-skin-tumours-a-meta-analysis
#3
REVIEW
Yi-Quan Xiong, Shu-Juan Ma, Yun Mo, Shu-Ting Huo, Yu-Qi Wen, Qing Chen
PURPOSE: Dermoscopy and reflectance confocal microscopy (RCM) are non-invasive methods for diagnosis of malignant skin tumours. The aim of this study was to compare the accuracy of dermoscopy and RCM for the diagnosis of malignant skin tumours. METHODS: Systematic electronic literature searches were conducted to include PubMed, Medline, Embase, the Cochrane Library database, and Web of Science, up to 26 April 2016. Pooled additional detection rate (ADR), diagnostic accuracy, and 95% confidence intervals (CIs) were calculated using STATA and Meta-Disc analysis...
March 13, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28285268/cardiac-manifestations-of-parasitic-diseases
#4
REVIEW
Maria Carmo P Nunes, Milton Henriques Guimarães Júnior, Adriana Costa Diamantino, Claudio Leo Gelape, Teresa Cristina Abreu Ferrari
The heart may be affected directly or indirectly by a variety of protozoa and helminths. This involvement may manifest in different ways, but the syndromes resulting from impairment of the myocardium and pericardium are the most frequent. The myocardium may be invaded by parasites that trigger local inflammatory response with subsequent myocarditis or cardiomyopathy, as occurs in Chagas disease, African trypanosomiasis, toxoplasmosis, trichinellosis and infection with free-living amoebae. In amoebiasis and echinococcosis, the pericardium is the structure most frequently involved with consequent pericardial effusion, acute pericarditis, cardiac tamponade or constrictive pericarditis...
March 11, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28284183/multiparametric-cardiac-magnetic-resonance-imaging-cmr-for-the-diagnosis-of-loeffler-s-endocarditis-a-case-report
#5
Mareike Gastl, Patrick Behm, Christoph Jacoby, Malte Kelm, Florian Bönner
BACKGROUND: Endocarditis parietalis fibroplastica Löfflein (EPF) is a rare form of primary restrictive cardiomyopathy with poor prognosis. It is generally caused by hypereosinophilic syndrome with eosinophilic penetration of the heart. This leads to congestive heart failure in three different stages. As a frequent manifestation of neoplastic diseases, cardiac involvement means poor prognosis. CASE PRESENTATION: The present report deals with a case of EPF caused by non-specified T-cell lymphoma (T-NOS)...
March 11, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28272610/some-limitations-of-an-approach-to-the-assembly-of-bryostatins-by-ring-closing-metathesis
#6
Raphaël Dumeunier, Thomas Gregson, Somhairle MacCormick, Hiroki Omori, Eric J Thomas
Preliminary studies into the use of ring-closing metathesis (RCM) in a convergent approach for the total synthesis of bryostatins are described. An ester that would have provided an advanced intermediate for a synthesis of a 20-deoxybryostatin by a RCM was prepared from an unsaturated acid and alcohol corresponding to the C1-C16 and C17-C27 fragments. However, studies of the formation of the C16-C17 double-bond by RCM were not successful and complex mixtures of products were obtained. To provide an insight into factors that may be involved in hindering RCM in this system, a slightly simplified C1-C16 acid and modified C17-C25 alcohols were prepared and their use for the synthesis of analogues of bryostatins was investigated...
March 8, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28263020/from-actinic-keratosis-to-squamous-cell-carcinoma-pathophysiology-revisited
#7
REVIEW
M T Fernandez Figueras
The precursor of most cutaneous invasive squamous cell carcinomas (iSCCs) is intraepithelial UV-induced damage, known as field cancerization, which can eventually transform into actinic keratosis (AK). Although AK is the most common precursor of iSCC, many AKs will either persist in the same stage or regress, while only a few will progress into iSCC. Nevertheless, because the progression of individual AKs cannot be predicted, it has been proposed that all AKs, regardless of the grade, should be carefully monitored and appropriately treated in clinical practice...
March 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28257147/configurations-of-the-re-scan-confocal-microscope-rcm-for-biomedical-applications
#8
G M R DE Luca, E Desclos, R M P Breedijk, L Dolz-Edo, G J Smits, P Bielefeld, L Picavet, C P Fitzsimons, R Hoebe, E M M Manders
The new high-sensitive and high-resolution technique, Re-scan Confocal Microscopy (RCM), is based on a standard confocal microscope extended with a re-scan detection unit. The re-scan unit includes a pair of re-scanning mirrors that project the emission light onto a camera in a scanning manner. The signal-to-noise ratio of Re-scan Confocal Microscopy is improved by a factor of 4 compared to standard confocal microscopy and the lateral resolution of Re-scan Confocal Microscopy is 170 nm (compared to 240 nm for diffraction limited resolution, 488 nm excitation, 1...
March 3, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28247876/new-potentially-chelating-nhc-ligands-synthesis-complexation-studies-and-preliminary-catalytic-evaluation
#9
Arnold Ou, Linglin Wu, Alvaro Salvador, Gellert Sipos, Guangzhen Zhao, Brian W Skelton, Alexandre N Sobolev, Reto Dorta
Two new N-heterocyclic carbene (NHC) ligands bearing 2-morpholino and 2-piperidinyl naphthyl wingtips were synthesised (2-SIMorNap and 2-SIPipNap). Nuclear magnetic resonance studies, in conjunction with crystal structures and derivatisation of the NHC salts using a chiral counteranion, revealed that the ligand wingtips are oriented anti with respect to each other. From the free carbene, palladium, ruthenium and iridium complexes were prepared. NHC-iridium dicarbonyl complexes were made in order to extract the TEP values for these ligands...
March 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28243497/dermoscopic-and-confocal-features-of-an-axillary-special-site-nevus
#10
Riana Dutt, Harold S Rabinovitz, Rajendra Singh, Alon Scope
"Nevi of special sites" is a term that denotes melanocytic nevi presenting in specific anatomic locations including the scalp, genital area, flexural sites, and acral sites [1]. Nevi from these anatomic sites display at times histopathologic features that may lead the reading pathologist to recommend re-excision of these benign nevi. Reflectance confocal microscopy (RCM) is a noninvasive imaging tool that allows for visualization of epidermal, dermal-epidermal junctional (DEJ), and superficial dermal tissue structures at cellular level resolution...
January 2017: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/28243496/reflectance-confocal-microscopy-features-of-facial-angiofibromas
#11
José-Francisco Millán-Cayetano, Oriol Yélamos, Anthony M Rossi, Michael A Marchetti, Manu Jain
Facial angiofibromas are benign tumors presenting as firm, dome-shaped, flesh-colored to pink papules, typically on the nose and adjoining central face. Clinically and dermoscopically they can mimic melanocytic nevi or basal cell carcinomas (BCC). Reflectance confocal microscopy (RCM) is a noninvasive imaging tool that is useful in diagnosing melanocytic and non-melanocytic facial lesions. To date no studies have described the RCM features of facial angiofibromas. Herein, we present two cases of facial angiofibromas that were imaged with RCM and revealed tumor island-like structures that mimicked BCC, leading to skin biopsy...
January 2017: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/28243488/-twin-lesions-which-one-is-the-bad-one-improvement-of-clinical-diagnosis-with-reflectance-confocal-microscopy
#12
Secil Saral, Daniela Hartmann, Valerie Letulè, Thomas Ruzicka, Cristel Ruini, Tanja von Braunmühl
BACKGROUND: In vivo reflectance confocal microscopy (RCM) is a novel non-invasive diagnostic tool, which is used to differentiate skin lesions. Even in lesions with similar dermatoscopic images, RCM may improve diagnostic accuracy. METHODS: Three sets of false "twin lesions" with similar macroscopic and dermatoscopic images are matched. All lesions are evaluated with RCM and lesions are excised for further evaluation. Corresponding features in confocal images, dermatoscopy and histopathology are discussed...
January 2017: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/28228523/vpx-overcomes-a-samhd1-independent-block-to-hiv-reverse-transcription-that-is-specific-to-resting-cd4-t-cells
#13
Hanna-Mari Baldauf, Lena Stegmann, Sarah-Marie Schwarz, Ina Ambiel, Maud Trotard, Margarethe Martin, Manja Burggraf, Gina M Lenzi, Helena Lejk, Xiaoyu Pan, Oliver I Fregoso, Efrem S Lim, Libin Abraham, Laura A Nguyen, Frank Rutsch, Renate König, Baek Kim, Michael Emerman, Oliver T Fackler, Oliver T Keppler
Early after entry into monocytes, macrophages, dendritic cells, and resting CD4 T cells, HIV encounters a block, limiting reverse transcription (RT) of the incoming viral RNA genome. In this context, dNTP triphosphohydrolase SAM domain and HD domain-containing protein 1 (SAMHD1) has been identified as a restriction factor, lowering the concentration of dNTP substrates to limit RT. The accessory lentiviral protein X (Vpx) proteins from the major simian immunodeficiency virus of rhesus macaque, sooty mangabey, and HIV-2 (SIVsmm/SIVmac/HIV-2) lineage packaged into virions target SAMHD1 for proteasomal degradation, increase intracellular dNTP pools, and facilitate HIV cDNA synthesis...
March 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28226355/-role-of-diagnostic-laparoscopy-in-the-treatment-plan-of-gastric-cancer
#14
Haojie Li, Qi Zhang, Ling Chen, Lingqiang Min, Xuefei Wang, Fenglin Liu, Yihong Sun
OBJECTIVE: To assess the clinical value of the diagnostic laparoscopy in choosing treatment strategies for patients with gastric cancer. METHODS: Retrospective analysis was performed on clinical and pathological data collected from 2 023 patients undergoing gastric cancer surgery in the Zhongshan Hospital of Fudan University from 2009 to 2014. All the patients were diagnosed as gastric cancer by endoscopic biopsy and staged by imaging examination before surgery...
February 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28218469/diagnostic-accuracy-of-reflectance-confocal-microscopy-using-vivascope-for-detecting-and-monitoring-skin-lesions-a-systematic-review
#15
S J Edwards, G Osei-Assibey, R Patalay, V Wakefield, C Karner
BACKGROUND: Skin cancer is one of the most common cancers in the UK. Patients with suspicious skin lesions are assessed clinically with/without dermoscopy, and lesions still considered suspicious are then surgically removed or have the diagnosis confirmed by a punch biopsy. AIM: To evaluate the diagnostic accuracy of the in vivo VivaScope(©) reflective confocal microscopy (RCM) system, a noninvasive technology designed to provide a more accurate presurgical diagnosis, leading to fewer biopsies of benign lesions, or to provide greater accuracy for lesion margins...
February 20, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28214381/the-value-of-reflectance-confocal-microscopy-in-diagnosis-of-flat-pigmented-facial-lesions-a-prospective-study
#16
E Wurm, G Pellacani, C Longo, H P Soyer, S Gonzalez, R Hofmann-Wellenhof, V Ahlgrimm-Siess, P Guitera, C Sinz, H Kittler
BACKGROUND: Flat pigmented facial lesions are difficult to diagnose even with dermatoscopy. It is controversial how additional information obtained by in vivo reflectance confocal microscopy (RCM) impacts the diagnosis and management. OBJECTIVE: To examine what in vivo reflectance confocal microscopy of flat pigmented facial lesions adds to clinical examination using dermatoscopy including digital dermatoscopic monitoring. METHODS: We prospectively collected 70 cases of flat pigmented facial lesions and recorded diagnoses and management decisions by experts based on direct clinical examination aided by dermatoscopy including digital dermatoscopic monitoring and by remote experts who reviewed the corresponding confocal images...
February 18, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28208780/preparation-of-constrained-geometry-titanium-complexes-of-1-2-azasilinane-framework-for-ethylene-1-octene-copolymerization
#17
Seul Lee, Seung Soo Park, Jin Gu Kim, Chung Sol Kim, Bun Yeoul Lee
The Me₂Si-bridged ansa-Cp/amido half-metallocene, [Me₂Si(η⁵-Me₄C₅)(N(t)Bu)]TiCl₂, termed a "constrained-geometry catalyst (CGC)", is a representative homogeneous Ziegler catalyst. CGC derivatives with the [1,2]azasilinane framework, in which the amide alkyl substituent is joined by the Si-bridge, were prepared, and the catalytic performances of these species was studied. Me₄C₅HSi(Me)(CH₂CH=CH₂)-NH(C(R)(R')CH=CH₂) (R, R' = H or methyl; Me₄C₅H = tetramethylcyclopentadienyl) was susceptible to ring closure metathesis (RCM) when treated with Schrock's Mo-catalyst to afford -Si(Me₄C₅H)(Me)CH₂CH=CHC(R)(R')NH- containing a six-membered ring framework...
February 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28191689/non-invasive-skin-imaging-for-the-diagnosis-of-myiasis
#18
E Cinotti, B Labeille, F Cambazard, F Dupuis, P Rubegni, J L Perrot
A 52-year-old man presented with a painful ulceration of the scalp (Fig. 1a). He had returned from Guyana the previous week. Dermoscopic examination (FotoFinder Systems GmbH, Bad Birnbach, Germany) showed an intermittent dynamic aspect changing from a sanguineous roundish ulcer (Fig. 1b) to a peculiar roundish structure characterized by a yellowish peripheral ring and a central brownish part (Fig. 1c). High-definition optical coherence tomography (HD-OCT; Skintell(®) ; Agfa Gevaert, Antverpen, Belgium) showed a skin cavity (Fig...
February 13, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28191661/combined-in-vivo-reflectance-confocal-microscopy-and-digital-dermoscopy-for-follow-up-of-patients-at-high-risk-of-malignant-melanoma-a-prospective-case-series-study
#19
Uxúa Floristán Muruzábal, Reyes Gamo Villegas, Ana Pampín Franco, Fernando Pinedo Moraleda, Elia Pérez Fernández, José Luis López-Estebaranz
Digital dermoscopy (DD) follow up is a useful strategy for monitoring patients at high risk of melanoma. Reflectance confocal microscopy (RCM) is a valuable second-level examination after dermoscopy for the evaluation of difficult to diagnose lesions. The aim of this study was to assess the value of RCM in routine DD monitoring of patients at high risk of melanoma. In this prospective study, performed over 22 months, changing melanocytic lesions were detected by DD and excised. RCM imaging was performed before surgical excision of all the lesions, and histopathology used as the gold standard diagnostic test...
February 13, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28186761/divergent-strategy-for-the-diastereoselective-synthesis-of-the-tricyclic-6-7-diaryltetrahydro-6h-benzo-c-chromene-core-via-pt-iv-catalyzed-cycloaddition-of-o-quinone-methides-and-olefin-ring-closing-metathesis
#20
Kassrin Tangdenpaisal, Kanokpish Chuayboonsong, Somsak Ruchirawat, Poonsakdi Ploypradith
A divergent strategy for the synthesis of the tricyclic 6,7-diaryltetrahydro-6H-benzo[c]chromene core was successfully developed. The 2,3-trans, 2,4-cis trisubstituted chroman moiety was formed via highly efficient and stereoselective Pt(IV)-catalyzed cycloaddition reactions of the corresponding quinone methides with chalcones. Subsequent steps provided the common diene alcohol, which underwent BF3·Et2O-mediated Et3SiH reduction and olefin ring-closing metathesis (RCM) using Ru(II) catalysts. The sequence of the final two steps provided a handle to diversify the stereochemical outcomes at C6 as well as C10a...
February 23, 2017: Journal of Organic Chemistry
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