Read by QxMD icon Read


Aleksey A Bolotovskiy, Marina A Levina, Jacquelin DeFaveri, Juha Merilä, Boris A Levin
The three-spined stickleback Gasterosteus aculeatus is an important model for studying microevolution and parallel adaptation to freshwater environments. Marine and freshwater forms differ markedly in their phenotype, especially in the number of lateral plates, which are serially repeated elements of the exoskeleton. In fishes, thyroid hormones are involved in adaptation to salinity, as well as the developmental regulation of serially repeated elements. To study how thyroid hormones influence lateral plate development, we manipulated levels of triiodothyronine and thiourea during early ontogeny in a marine and freshwater population with complete and low plate phenotypes, respectively...
2018: PloS One
Mikhail M Kostik, Evgeny N Suspitsin, Marina N Guseva, Anastasia S Levina, Anastasia Y Kazantseva, Anna P Sokolenko, Evgeny N Imyanitov
NLRP12-related autoinflammatory disease (NLRP12-AID) is an exceptionally rare autosomal dominant disorder caused by germline mutations in NLRP12 gene. Very few patients with NLRP12-AD have been identified worldwide; therefore, there is a scarcity of data on phenotypic presentation of this syndrome. Here we provide evidence that NLRP12-AID may have clinical manifestations characteristic for primary immune deficiencies (PID). 246 children with periodic fever (PF) of unknown origin were subjects to the next generation sequencing (NGS) analysis; 213 of these patients had signs of primary immunodeficiency (PID) manifested by recurrent infections, while 33 kids had isolated PF...
March 2, 2018: Rheumatology International
Yu V Levina, A L Guseva, E V Baibakova
The authors describe a rare clinical case of psychogenic hearing loss in a female patient presenting Munchausen's syndrome with special reference to the objective and subjective methods designed to evaluate the hearing ability and used for diagnostics of this condition.
2018: Vestnik Otorinolaringologii
V T Pal'chun, N S Tropskaya, Yu V Levina, S P Efimova, A L Guseva
The objective of the present work was to elucidate the characteristics of broad-band tympanometry in the healthy subjects with the unaffected hearing ability. The study involved 54 volunteers (27 men and 27 women) at the age from 21 to 55 years exhibiting no pathologic changes in the ear system as confirmed by the tone threshold audiometry, otoacoustic emission, tympaometry at a frequency of 226 Hz, and reflexometry. All the participants of the study underwent absorbance measurements by broad-band tympanometry within the frequency range from 226 to 8,000 Hz at an ambient pressure...
2018: Vestnik Otorinolaringologii
A V Gurov, Yu V Levina, A L Guseva, Z G Elchueva, S P Efimova, M V Gordienko
The objective of the present study was to elucidate the specific features of the clinical course of acute otitis media as well as the peculiarities of the vestibular function and the microbial paysage associated with this pathological condition under the present-day conditions. The study included 135 patients presenting with acute otitis media (AOM) at different stages of the disease. The discharge obtained from the tympanic cavity of all the patients was examined with the use of polymerase chain reaction in real time, audiological and vestibulogical methods...
2018: Vestnik Otorinolaringologii
V T Pal'chun, O A Mel'nikov, Yu V Levina, A L Guseva
AIM: The objective of the present study was to evaluate the frequency of occurrence and clinical features of vertigo spells in the patients presenting with Ménière's disease (MD) associated with benign paroxysmal positional vertigo (BPPV). METHODS: A total of 104 patients with MD were available for the observation. All of them underwent the comprehensive examination that included the audiological study and vestibular tests, such as the Dix-Hallpike test and the roll-test for BPPV diagnostics...
2018: Vestnik Otorinolaringologii
M V Vetrova, O V Aleksandrova, A E Paschenko, S E Toropov, V V Rassokhin, R A Abyshev, O S Levina, L M Niccolai, R Heimer
The proportion of people living with HIV (PLWH) in need of antiretroviral therapy (ART) is growing rapidly in Russia. Successful treatment outcomes reduces disease progression and contributes to HIV epidemic control. We conducted a pilot study following 100 PLWH newly found eligible for ART in St. Petersburg, Russia. We determined the proportion of PLWH who initiated ART, remained in treatment, and achieved an undetectable VL during 6-month follow up. Semi-structured interviews were conducted prior the initiation of ART and progress along the cascade was assessed through medical chart review...
January 11, 2018: AIDS Care
Isabel Tavitian-Exley, Mathieu Maheu-Giroux, Lucy Platt, Robert Heimer, Anneli Uusküla, Olga Levina, Peter Vickerman, Marie-Claude Boily
BACKGROUND AND OBJECTIVE: People who inject drugs (PWID) account for over half of new HIV infections in Eastern Europe and central Asia, where opioids continue to be the dominant illicit drugs injected. Stimulants including amphetamines (ATS) have been associated with HIV infection risk in several settings. We sought to examine whether primary ATS injection was associated with greater HIV risk, compared to opioid injection in two European locales with significant HIV epidemics. METHODS: PWID in Kohtla-Järve and St...
January 4, 2018: International Journal on Drug Policy
Yury V Kuznetsov, Inna S Levina, Alexander M Scherbakov, Olga E Andreeva, Irina V Fedyushkina, Andrey S Dmitrenok, Alexander S Shashkov, Igor V Zavarzin
New estrogen receptor α (ERα) antagonists - 3,20-dihydroxy-19-norpregna-1,3,5(10)-trienes containing an additional carbocyclic ring D' at the 16α,17α positions - were synthesized. The effects of the new compounds on the MCF-7 breast cancer cells and ERα activation were investigated. All the steroids studied were synthesized starting from estrone methyl ether. The scaffold of compounds containing the six-membered ring D' was constructed via the Diels-Alder reaction of butadiene with 3-methoxy-19-norpregna-1,3,5(10),16-tetraen-20-one 5...
January 1, 2018: European Journal of Medicinal Chemistry
Igor Mokrousov, Ekaterina Chernyaeva, Anna Vyazovaya, Yuriy Skiba, Natalia Solovieva, Violeta Valcheva, Klavdia Levina, Natalya Malakhova, Wei-Wei Jiao, Lia Lima Gomes, Philip N Suffys, Marge Kütt, Nagima Aitkhozhina, A-Dong Shen, Olga Narvskaya, Viacheslav Zhuravlev
Mycobacterium tuberculosis isolates of the Beijing 94-32-cluster (also named "Central Asian/Russian Beijing strain") constitute an important component of the population structure of the pathogen in the Former Soviet Union (FSU) countries (1-4).….
November 15, 2017: Journal of Clinical Microbiology
Steven M Banik, Anna Levina, Alan M Hyde, Eric N Jacobsen
Small-molecule dual hydrogen-bond (H-bond) donors such as ureas, thioureas, squaramides, and guanidinium ions enjoy widespread use as effective catalysts for promoting a variety of enantioselective reactions. However, these catalysts are only weakly acidic and therefore require highly reactive electrophilic substrates to be effective. We introduce here a mode of catalytic activity with chiral H-bond donors that enables enantioselective reactions of relatively unreactive electrophiles. Squaramides are shown to interact with silyl triflates by binding the triflate counterion to form a stable, yet highly Lewis acidic, complex...
November 10, 2017: Science
Olga A Ivanova, Alexey O Chagarovskiy, Alexey N Shumsky, Vasiliy D Krasnobrov, Irina I Levina, Igor V Trushkov
We report a mild Lewis acid-induced isomerization of donor-acceptor cyclopropanes, containing an alkenyl moiety and diverse electron-withdrawing group(s) at the adjacent positions, into substituted cyclopentenes. We have found that 1,1,2-trisubstituted cyclopent-3-enes were exclusively obtained in yield of 51 to 99% when cyclopropanes with 2-substituted alkenyl group as a donor underwent isomerization. For cyclopropanes bearing trisubstituted alkenyl group either the corresponding cyclopent-3-enes or isomeric cyclopent-2-enes having two acceptor groups at the C(1) atom were formed, with the reaction selectivity being determined by the applied Lewis acid...
November 7, 2017: Journal of Organic Chemistry
Anna Vyazovaya, Klavdia Levina, Viacheslav Zhuravlev, Piret Viiklepp, Marge Kütt, Igor Mokrousov
Objectives: We assessed the genetic structure of the Mycobacterium tuberculosis population in Estonia with a special focus on major epidemic/endemic clones and drug resistance determinants. We investigated the hypothesis of the decisive impact of massive human influx on the locally circulating genotypes. Estonia received a mass immigration from Russia during 1945-90 followed by enhanced interaction with the EU since 1991. Methods: The study sample included M. tuberculosis isolates from patients newly diagnosed with TB in 2014 in North Estonia (including the capital Tallinn)...
October 30, 2017: Journal of Antimicrobial Chemotherapy
Oleksandr Voznyy, Larissa Levina, Feng-Jia Fan, Grant Walters, James Z Fan, Amirreza Kiani, Alexander H Ip, Susanna M Thon, Andrew Proppe, Mengxia Liu, Edward H Sargent
Stokes shift, an energy difference between the excitonic absorption and emission, is a property of colloidal quantum dots (CQDs) typically ascribed to splitting between dark and bright excitons. In some materials, e.g., PbS, CuInS2, CdHgTe, a Stokes shift of up to 200 meV is observed, substantially larger than the estimates of dark-bright state splitting or vibronic relaxations. The shift origin remains highly debated, as contradictory signatures of both surface and bulk character were reported for the Stokes-shifted electronic state...
October 27, 2017: Nano Letters
James Z Fan, Mengxia Liu, Oleksandr Voznyy, Bin Sun, Larissa Levina, Rafael Quintero-Bermudez, Min Liu, Olivier Ouellette, F Pelayo García de Arquer, Sjoerd Hoogland, Edward H Sargent
Colloidal quantum dots are promising materials for tandem solar cells that complement silicon and perovskites. These devices are fabricated from solution phase; however, existing methods for making infrared-bandgap CQD inks suffer agglomeration and fusion during solution exchange. Here we develop a ligand exchange that provides robust surface protection and thereby avoids aggregation. First, we exchanged long oleic acid ligands to a mixed system comprising medium-chain ammonium and anionic chloride ligands; we then reshelled the surface using short halides and pseudohalide ligands that enabled transfer to a polar solvent...
October 20, 2017: ACS Applied Materials & Interfaces
Jana Reiter, Natalja Levina, Mark van der Linden, Martin Gruhlke, Christian Martin, Alan J Slusarenko
Garlic (Allium sativum) has potent antimicrobial activity due to allicin (diallylthiosulfinate) synthesized by enzyme catalysis in damaged garlic tissues. Allicin gives crushed garlic its characteristic odor and its volatility makes it potentially useful for combating lung infections. Allicin was synthesized (>98% pure) by oxidation of diallyl disulfide by H₂O₂ using formic acid as a catalyst and the growth inhibitory effect of allicin vapor and allicin in solution to clinical isolates of lung pathogenic bacteria from the genera Pseudomonas, Streptococcus, and Staphylococcus, including multi-drug resistant (MDR) strains, was demonstrated...
October 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Monica S Ruiz, Robert Heimer, Olga S Levina, N V Badosova, Vadim V Rassokhin, Andrey N Belyakov, Nikolai A Belyakov
Background: Little is known about the clinical care experiences of HIV-infected persons in St. Petersburg who have experience with incarceration. To address this question, we conducted a capture-recapture study to identify individuals who had been diagnosed with HIV infection while incarcerated and who subsequently presented for medical care in St. Petersburg, Russia following release from prison. Methods: We matched 292 HIV-positive prisoners tested by the prison system in 2010 to the medical records at the St...
August 31, 2017: European Journal of Public Health
Manal A Farg, Vinod Sundaramoorthy, Jessica M Sultana, Shu Yang, Rachel A K Atkinson, Vita Levina, Mark A Halloran, Paul A Gleeson, Ian P Blair, Kai Y Soo, Anna E King, Julie D Atkin
No abstract text is available yet for this article.
October 15, 2017: Human Molecular Genetics
A S Levina, M N Repkova, B P Chelobanov, E V Bessudnova, N A Mazurkova, D A Stetsenko, V F Zarytova
We have previously described nanocomposites containing conjugates or complexes of native oligodeoxyribonucleotides with poly-L-lysine and TiO2 nanoparticles. We have shown that these nanocomposites efficiently suppressed influenza A virus reproduction in MDCK cells. Here, we have synthesized previously undescribed nanocomposites that consist of TiO2 nanoparticles and polylysine conjugates with oligonucleotides that contain phosphoryl guanidine or phosphorothioate internucleotide groups. These nanocomposites have been shown to exhibit antiviral activity in MDCK cells infected with H5N1 influenza A virus...
July 2017: Molekuliarnaia Biologiia
Juan Cong, Yangyang Wang, Xiao Zhang, Nan Zhang, Ling Liu, Klara Soukup, Theodoros Michelakos, Theodore Hong, Albert DeLeo, Lei Cai, Francesco Sabbatino, Soldano Ferrone, Hang Lee, Vera Levina, Bryan Fuchs, Kenneth Tanabe, Keith Lillemoe, Cristina Ferrone, Xinhui Wang
Pancreatic ductal adenocarcinoma (PDAC) has a 5-year relative survival rate of 8% and is projected to be the second leading cause of cancer death by 2030, underscoring the urgency to develop new strategies to improve current therapeutic modalities for PDAC. Targeting pancreatic cancer stem cells (PCSCs), which are resistant to radiation and chemotherapy, is a promising strategy. A novel approach which can be readily clinically translated is to repurpose disulfiram (DSF), a drug for treating alcoholism, to target PCSCs...
November 28, 2017: Cancer Letters
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"