In glioma patients, differentiation between tumor progression (TP) and treatment-related changes (TRCs) remains challenging. Difficulties in classifying imaging alterations may result in a delay or an unnecessary discontinuation of treatment. PET using O-(2-¹⁸F-fluoroethyl)-l-tyrosine (¹⁸F-FET) has been shown to be a useful tool for detecting TP and TRCs. Methods: We retrospectively evaluated 127 consecutive patients with World Health Organization grade II–IV glioma who underwent ¹⁸F-FET PET imaging to distinguish between TP and TRCs. ¹⁸F-FET PET findings were verified by neuropathology (40 patients) or clinicoradiologic follow-up (87 patients). Maximum tumor-to-brain ratios (TBR_max) of ¹⁸F-FET uptake and the slope of the time–activity curves (20–50 min after injection) were determined. The diagnostic accuracy of ¹⁸F-FET PET parameters was evaluated by receiver-operating-characteristic analysis and ² testing. The prognostic value of ¹⁸F-FET PET was estimated using the Kaplan–Meier method. Results: TP was diagnosed in 94 patients (74%) and TRCs in 33 (26%). For differentiating TP from TRCs, receiver-operating-characteristic analysis yielded an optimal ¹⁸F-FET TBR_max cutoff of 1.95 (sensitivity, 70%; specificity, 71%; accuracy, 70%; area under the curve, 0.75 ± 0.05). The highest accuracy was achieved by a combination of TBR_max and slope (sensitivity, 86%; specificity, 67%; accuracy, 81%). However, accuracy was poorer when tumors harbored isocitrate dehydrogenase (IDH) mutations (91% in IDH-wild-type tumors, 67% in IDH-mutant tumors, P < 0.001). ¹⁸F-FET PET results correlated with overall survival (P < 0.001). Conclusion: In our neurooncology department, the diagnostic performance of ¹⁸F-FET PET was convincing but slightly inferior to that of previous reports.

Knowledge of the molecular events in mitochondrial DNA (mtDNA) replication is crucial to understanding the origins of human disorders arising from mitochondrial dysfunction. Twinkle helicase is an essential component of mtDNA replication. Here, we employed atomic force microscopy imaging in air and liquids to visualize ring assembly, DNA binding, and unwinding activity of individual Twinkle hexamers at the single-molecule level. We observed that the Twinkle subunits self-assemble into hexamers and higher-order complexes that can switch between open and closed-ring configurations in the absence of DNA. Our analyses helped visualize Twinkle loading onto and unloading from DNA in an open-ringed configuration. They also revealed that closed-ring conformers bind and unwind several hundred base pairs of duplex DNA at an average rate of ∼240 bp/min. We found that the addition of mitochondrial single-stranded (ss) DNA–binding protein both influences the ways Twinkle loads onto defined DNA substrates and stabilizes the unwound ssDNA product, resulting in a ∼5-fold stimulation of the apparent DNA-unwinding rate. Mitochondrial ssDNA-binding protein also increased the estimated translocation processivity from 1750 to >9000 bp before helicase disassociation, suggesting that more than half of the mitochondrial genome could be unwound by Twinkle during a single DNA-binding event. The strategies used in this work provide a new platform to examine Twinkle disease variants and the core mtDNA replication machinery. They also offer an enhanced framework to investigate molecular mechanisms underlying deletion and depletion of the mitochondrial genome as observed in mitochondrial diseases.

Marking the release of an MPI report, speakers on this webinar present an overview of regional immigration enforcement trends, including U.S. and Mexican apprehensions and deportations of both children and adults, along with a demographic, socioeconomic, and criminal profile of child and adult deportees.

This report examines the rising numbers of apprehensions and deportations of Central American children and adults by the United States and Mexico, and provides a demographic, socioeconomic, and criminal profile of deportees to El Salvador, Guatemala, and Honduras. The report traces how rising Mexican enforcement is reshaping regional dynamics and perhaps ushering in changes to long-lasting trends in apprehensions.

This webinar includes an overview of regional immigration enforcement trends, including U.S. and Mexican apprehensions and deportations of Central American migrants, along with a demographic, socioeconomic, and criminal profile of child and adult deportees.

Coronavirus brings worldwide horse racing almost to a halt, with only one Grade 1 event on the weekend schedule, but rays of hope exist.

A Google-related company has pulled the plug on its ambitious high-tech waterfront city project in Toronto, citing financial strains from the coronavirus, but the project had also run into local opposition.

As highly industrialized countries ramp up their border controls, human smugglers are playing a central role in moving migrants through key migration corridors around the world. Despite the illicit nature of their work and being cast as villains in the public eye, smugglers have complex, multifaceted relationships with their clients. At times, the relationship can be mutually beneficial or even lifesaving; at others, it can be predatory and dangerous, as this article explores.

Google's homepage features arcade classic "Pac-Man" in the latest Doodle.

K-pop star Minzy shared a comeback schedule for her new solo single, "Lovely."

I know it's Ramadan, but I've been feeling urges for a few years now and it's just getting more and more now. I always imagine about sex and loving my to-be wife. Right now, I'm studying medicine, so my parents told me it's too early to get married (24 years old). I just don't know really what to do. I prone masturbate to get some relief. What should I do?

Hello I am a man 36 years old and, My ex girlfriend and I and I were together from January to August 2012, my ex girlfriend's daughter was very affectionate with me, I miss her what I can do I was very fond of her, what can I do ?

I’ve been talking to a man, we have mutual interest in each other. We talked on the phone for over an hour the night before last and it was an amazing conversation. The next day he had no contact with me, which in my mind it didn’t bother me and still kind of isn’t I think he just is doing his own thing and likes his personal space. I’m not too bothered or worried but still questioning why? Is it normal for a man to kinda disappear and have no contact for a day?

AHP readers will be interested in a review article now available online from History of the Human Sciences “Within a single lifetime: Recent writings on autism.” Written by Gregory Hollin the piece reviews five recent books on autism.

Loneliness is a surprisingly common phenomenon in the 21st century. In 2018, a survey conducted by The Economist and the Kaiser Family Foundation revealed that 22% of adults in the United States and 23% of adults in the United Kingdom often or always feel lonely or left out. Interestingly, many people who describe themselves as […]

Keeping up with students’ growing mental-health needs was a concern for districts long before the pandemic began. It’s even harder now, educators and psychologists say.

Keeping up with students’ growing mental-health needs was a concern for districts long before the pandemic began. It’s even harder now, educators and psychologists say.

Keeping up with students’ growing mental-health needs was a concern for districts long before the pandemic began. It’s even harder now, educators and psychologists say.

Keeping up with students’ growing mental-health needs was a concern for districts long before the pandemic began. It’s even harder now, educators and psychologists say.

Pennsylvania Gov. Tom Wolf, a Democrat, has become increasingly critical of charter schools this year, and his new proposals for charters would change how they operate and how they are funded.

Keeping up with students’ growing mental-health needs was a concern for districts long before the pandemic began. It’s even harder now, educators and psychologists say.

Stroud, G. J. (Gabrielle J.), 1977-

Bible. Galatians, III, 28 -- Criticism, interpretation, etc

Women immigrants -- Australia -- History.

Giessen : J. Ricker, 1856.

Jena : H. Pohle, [1889]

Berlin : R. Oppenheim, 1879.

Frankfurt a. M. : C. Winter, 1865.

Jena : G. Fischer, 1911.

Leipzig : W. Engelmann, 1870.

Berlin : Karger, 1910.

Leipzig : J.A. Barth, 1899.

Mississippi’s outdated textbooks teach an abbreviated version of civil rights, undermining the state’s new ‘innovative’ standards.

London (6 Pall Mall) : Messrs Moon, Boys & Graves ; Manchester : J.C. Grundy, July 2 1832.

[1856]

London (6, Pall Mall) : Published ... by Henry Graves, & Comp.y, May 10th, 1856.

Si stampano in Roma (alla Pace ; all'insegna di Parigi) : per Giovan Jacomo Rossi, [1641?]

Margie Vandeven, the state education chief, is appointed by an appointed board, which is still split on whether to fire Vandeven.

Stuttgart : Franz Steiner Verlag, 2019.

Datasets in sleep science present challenges for machine learning algorithms due to differences in recording setups across clinics. We investigate two deep transfer learning strategies for overcoming the channel mismatch problem for cases where two datasets do not contain exactly the same setup leading to degraded performance in single-EEG models. Specifically, we train a baseline model on multivariate polysomnography data and subsequently replace the first two layers to prepare the architecture for single-channel electroencephalography data. Using a fine-tuning strategy, our model yields similar performance to the baseline model (F1=0.682 and F1=0.694, respectively), and was significantly better than a comparable single-channel model. Our results are promising for researchers working with small databases who wish to use deep learning models pre-trained on larger databases.

Yiyi Liu, Joshua L. Warren, Hongyu Zhao.

Source: The Annals of Applied Statistics, Volume 13, Number 3, 1733--1752.

Abstract:
Understanding the heterogeneity of cells is an important biological question. The development of single-cell RNA-sequencing (scRNA-seq) technology provides high resolution data for such inquiry. A key challenge in scRNA-seq analysis is the high variability of measured RNA expression levels and frequent dropouts (missing values) due to limited input RNA compared to bulk RNA-seq measurement. Existing clustering methods do not perform well for these noisy and zero-inflated scRNA-seq data. In this manuscript we propose a Bayesian hierarchical model, called BasClu, to appropriately characterize important features of scRNA-seq data in order to more accurately cluster cells. We demonstrate the effectiveness of our method with extensive simulation studies and applications to three real scRNA-seq datasets.

Pavel Zorin-Kranich.

Source: Bernoulli, Volume 26, Number 3, 2311--2318.

Abstract:
We prove an estimate for weighted $p$th moments of the pathwise $r$-variation of a martingale in terms of the $A_{p}$ characteristic of the weight. The novelty of the proof is that we avoid real interpolation techniques.