bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preterm Birth Impacts the Timing and Excursion of Oropharyngeal Structures during Infant Feeding
Authors: Edmonds C E , Catchpole E A , Gould F D H , Bond L E , Stricklen B M , German R Z , Mayerl C J 
Published: August 2020

SynopsisSwallowing in mammals requires the precise coordination of multiple oropharyngeal structures, including the palatopharyngeal arch. During a typical swallow, the activity of the palatopharyngeus muscle produces pharyngeal shortening to assist in producing pressure required to swallow and may initiate epiglottal flipping to protect the airway. Most research on the role of the palatopharyngeal arch in swallowing has used pharyngeal manometry, which measures the relative pressures in the oropharynx, but does not quantify the movements of the structures involved in swallowing. In this study, we assessed palatopharyngeal arch and soft palate function by comparing their movements in a healthy population to a pathophysiological population longitudinally through infancy (term versus preterm pigs). In doing so, we test the impact of birth status, postnatal maturation, and their interaction on swallowing. We tracked the three-dimensional (3D) movements of radiopaque beads implanted into relevant anatomical structures and recorded feeding via biplanar high-speed videofluoroscopy. We then calculated the total 3D excursion of the arch and soft palate, the orientation of arch movement, and the timing of maximal arch constriction during each swallow. Soft palate excursion was greater in term infants at both 7 and 17 days postnatal, whereas arch excursion was largely unaffected by birth status. Maximal arch constriction occurred much earlier in preterm pigs relative to term pigs, a result that was consistent across age. There was no effect of postnatal age on arch or soft palate excursion. Preterm and term infants differed in their orientation of arch movement, which most likely reflects both differences in anatomy and differences in feeding posture. Our results suggest that the timing and coordination of oropharyngeal movements may be more important to feeding performance than the movements of isolated structures, and that differences in the neural control of swallowing and its maturation in preterm and term infants may explain preterm swallowing deficits.
Metabolism Study of N-Methyl 2-Aminoindane (NM2AI) and Determination of Metabolites in Biological Samples by LC–HRMS
Authors: Mestria Serena , Odoardi Sara , Federici Sofia , Bilel Sabrine , Tirri Micaela , Marti Matteo , Strano Rossi Sabina 
Published: August 2020

Abstract
Since the widespread diffusion of new psychoactive substances, forensic laboratories are often required to identify new drugs and their metabolites for which information or reference standards are lacking. We performed a study on N-methyl-2-aminoindane (NM2AI) metabolism in silico and in vivo, in order to identify the main metabolites to be screened in the different biological samples. We performed the in silico metabolism prediction of NM2AI using MetaSiteTM software and subsequently verified the presence of metabolites in the blood, urine and hair of mice after NM2AI administration. The samples were analyzed by liquid chromatography–high-resolution mass spectrometry (LC–HRMS) with a benchtop Orbitrap Exactive mass detector. This allowed the evaluation of the agreement between software prediction and experimental results in biological samples. LC–HRMS analysis identified seven main metabolites in the urine. They were identified, by their accurate masses and fragmentation patterns, as 2-aminoindane (2AI), two hydroxy-2AI and four hydroxy-NM2AI; one of the hydroxy-NM2AI and one of the hydroxy-2AI underwent also to conjugation. NM2AI and 2AI were also detected by LC–HRMS in the hair and blood. Based on these findings, we developed an LC–HRMS method for the screening of NM2AI and metabolites in urine, blood and hair samples. This can be of primary effectiveness to uncover the abuse of NM2AI and related possible intoxications.
Sexual dimorphism of the major chela and sex ratio as indicators of the mating system in the estuarine snapping shrimpAlpheus colombiensisWicksten, 1988 (Decapoda: Caridea: Alpheidae)
Authors: Azofeifa-Solano Juan C , Sibaja-Cordero Jeffrey A , Wehrtmann Ingo S 
Published: August 2020

AbstractThe sexual selection over traits that favor access to mating partners could promote the emergence of sexual dimorphism when the pressure is different between sexes. Monogamous species are considered to have a low degree of sexual dimorphism. The highly diverse snapping shrimps are usually regarded as monogamous, but the mating system has been studied only in few species. We aimed to provide insights into the mating system and sexual dimorphism of Alpheus colombiensisWicksten, 1988. The adult sex ratio was female biased, and solitary ovigerous females were found, suggesting a temporary mate guarding type of mating system. Our results also revealed sexual dimorphism on the snapping claw, which is larger in males than in females. The male’s snapping claw is probably under sexual selection, which can be mediated by male-male competition or female choice. We also estimated the A. colombiensis female size at maturity at 5.2 ± 0.76 mm. Our results contradict the common idea that snapping shrimps are monogamous species, and support that A. colombiensis probably have a temporary mate guarding (e.g., males can sexually interact with more than one female, in opposition to sexual monogamy). This study also sustains the growing evidence that alpheid shrimps display snapping claw sexual dimorphism.
Reproductive biology of the freshwater shrimpMacrobrachium tenellum(Smith, 1871) (Decapoda: Caridea: Palaemonidae) in Mexico
Authors: López-Uriarte Ernesto , Vega-Villasante Fernando , Wehrtmann Ingo S , Cortés-Jacinto Edilmar , García-Guerrero Marcelo U , Badillo-Zapata Daniel , Chong-Carrillo Olimpia , Vargas-Ceballos Manuel A 
Published: August 2020

AbstractWe analyzed the reproductive cycle of females of the palaemonid shrimp Macrobrachium tenellum (Smith, 1871) collected in the Ameca River, between the Jalisco and Nayarit states, Mexico. We studied the seasonal occurrence of ovigerous females during the year, their relationship with abiotic factors, and the size of the first sexual maturity. The study included 7,100 specimens of M. tenellum, of which 2,791 (39.3%) were males, 3,559 (50.1%) females, and 750 undifferentiated (10.6%). The sex ratio of the total (male-female) population differed significantly from the expected 1:1 with more females. A total of 309 females carried eggs (8.7% of all collected females). Ovigerous females, which were collected in three of the four sampling sites, were found almost year-round (with the exception of March and December), and their number showed a significant positive correlation with water temperature and rainfall. The size of first maturity (TL50%) for all collected females was 55.7 mm total length (TL), ranging from 64.3 mm TL to 42.7 mm TL. The results revealed that the population of M. tenellum in the Ameca River has a continuous reproductive period associated with the rainy season and increasing water temperature.
Breast Cancer Screening Trials: Endpoints and Overdiagnosis
Authors: Jatoi Ismail , Pinsky Paul F 
Published: August 2020

Abstract
Screening mammography was assessed in 9 randomized trials initiated between 1963 and 1990, with breast cancer-specific mortality as the primary endpoint. In contrast, breast cancer detection has been the primary endpoint in most screening trials initiated during the past decade. These trials have evaluated digital breast tomosynthesis, magnetic resonance imaging, and ultrasound, and novel screening strategies have been recommended solely on the basis of improvements in breast cancer detection rates. Yet, the assumption that increases in tumor detection produce reductions in cancer mortality has not been validated, and tumor-detection endpoints may exacerbate the problem of overdiagnosis. Indeed, the detection of greater numbers of early stage breast cancers in the absence of a subsequent decline in rates of metastatic cancers and cancer-related mortality is the hallmark of overdiagnosis. There is now evidence to suggest that both ductal carcinoma in situ and invasive cancers are overdiagnosed as a consequence of screening. For each patient who is overdiagnosed with breast cancer, the adverse consequences include unnecessary anxiety, financial hardships, and a small risk of morbidity and mortality from unnecessary treatments. Moreover, the overtreatment of breast cancer, as a consequence of overdiagnosis, is costly and contributes to waste in health-care spending. In this article, we argue that there is a need to establish better endpoints in breast cancer screening trials, including quality of life and composite endpoints. Tumor-detection endpoints should be abandoned, because they may lead to the implementation of screening strategies that increase the risk of overdiagnosis.
Validation of the NSABP/NRG Oncology 8-Gene Trastuzumab-benefit Signature in Alliance/NCCTG N9831
Authors: Pogue-Geile Katherine L , Song Nan , Serie Daniel J , Wang Ying , Gavin Patrick G , Kim Rim S , Tanaka Noriko , Fumagalli Debora , Taniyama Yusuke , Li Zhuo , Rastogi Priya , Swain Sandra M , Mamounas Eleftherios P , Geyer Charles E , Wolmark Norman , Lucas Peter C , Paik Soonmyung , Thompson E Aubrey 
Published: August 2020

Abstract
Our objective was to validate the NSABP 8-gene trastuzumab-benefit signature, developed and initially validated in NRG Oncology/NSABP B-31 in Alliance/NCCTG N9831. The B-31 and N9831 trials demonstrated the benefit of adding trastuzumab to chemotherapy in the adjuvant setting for HER2+ breast cancer patients. NSABP investigators utilized gene expression profiles of N9831 patients (N = 892) to blindly assign patients to large-, moderate-, or no-trastuzumab benefit groups and then NCCTG investigators assessed the degree of trastuzumab benefit using Cox models adjusted for age, nodes, estrogen receptor/progesterone receptor status, tumor size, and grade. Hazard ratios and 2-sided P values for recurrence-free survival of the predicted large- (n = 387), moderate- (n = 401), and no-benefit (n = 104) groups, based on the 8-gene signature were 0.47 (95% CI = 0.31 to 0.73, P &lt; .001), 0.60 (95% CI = 0.39 to 0.92, P = .02), and 1.54 (95% CI = 0.59 to 4.02, P = .38), respectively (Pinteraction = .02), providing validation of the 8-gene signature in an independent study.
The Enforceability of Noncompete Clauses in the Medical Profession: A Review by the Workforce Committee and the Medicolegal Committee of the Council of State Neurosurgical Societies
Authors: Huntoon Kristin , Stacy Jason , Cioffi Susie , Swartz Karin , Mazzola Catherine , Profitt Caleb , Adogwa Owoicho 
Published: August 2020

Abstract

BACKGROUND
In both academic and private practice, noncompete clauses are common in many neurological surgery contracts. Noncompete agreements vary, depending on various factors, including the surgeon’s subspecialty, location, and business-related considerations. Each individual state’s law on contracts determines the extent to which noncompete clauses are enforceable.

OBJECTIVE
To evaluate the disparate approaches of various states regarding the enforceability of these clauses and their components.

METHODS
This review surveys several of the most populous states’ law regarding noncompete clauses. This analysis includes an evaluation of state statutes and common law regarding noncompete clauses. It also relies on legal treatises and law review articles.

RESULTS
The enforceability of the noncompete clause depends on the state in which the physician is employed.

CONCLUSION
It is imperative that individuals understand the content of any noncompete clauses in their contract, as well the climate of the state in which they practice. The state's approach determines whether any part or all of the noncompete agreement is enforceable. A review by the Workforce Committee and the Medico-legal Committee of the Council of State Neurosurgical Societies (CSNS) provides explanation of the common elements in restrictive covenants or noncompete clauses and reviews the enforceability of these clauses.
Identification of the activity source of CO2 electroreduction by strategic catalytic site distribution in stable supramolecular structure system
Authors: Sun Sheng-Nan , Li Ning , Liu Jiang , Ji Wen-Xin , Dong Long-Zhang , Wang Yi-Rong , Lan Ya-Qian 
Published: August 2020

AbstractIdentification of the real catalytic site in CO2 reduction reaction (CO2RR) is critical for the rational design of catalysts and the understanding of reactive mechanisms. In this study, the catalytic activity of pyridine-containing materials was for the first time structurally demonstrated in CO2RR by crystalline supramolecular coordination compounds model system. The system consists of three stable supramolecular coordination compounds (Ni-TPYP, Ni-TPYP-1 and Ni-TPP) with different numbers (4, 2 and 0) of active pyridine groups (i.e. uncoordinated pyridine nitrogen atoms). The electrocatalytic test results show that with the decrease of the number of active pyridine groups, the CO2RR performance is gradually reduced, mainly showing the reduction of highest FECO (99.8%, 83.7% and 25.6%, respectively). The crystallographic, experimental and theoretical evidences prove that the CO2RR activity is more likely derived from uncoordinated pyridine nitrogen than the electrocatalytic inert metal nickel in porphyrin center. This work serves as an important case study for the identification of electrocatalytic activity of pyridine-containing materials in CO2RR by simple supramolecular model system.
Trapping endoplasmic reticulum with amphiphilic AIE-active sensor via specific interaction of ATP-sensitive potassium (KATP)
Authors: Zhu Zhirong , Wang Qi , Liao Hongze , Liu Ming , Liu Zhenxing , Zhang Youheng , Zhu Wei-Hong 
Published: August 2020

Abstract
The current aggregation-induced emission luminogens (AIEgens) sometimes suffer from poor targeting selectivity due to undesirable aggregation in the hydrophilic biosystem with ‘always-on’ fluorescence or unspecific aggregation in the lipophilic organelle with prematurely activated fluorescence. Herein, we report an unprecedented ‘amphiphilic AIEgen’ sensor QM-SO3-ER based on the AIE building block of quinoline-malononitrile (QM). The introduced hydrophilic sulfonate group can well control the specific solubility in a hydrophilic system with desirable initial ‘fluorescence-off’ state. Moreover, the incorporated p-toluenesulfonamide group plays two roles: enhancing the lipophilic dispersity, and behaving as binding receptor to the adenosine triphosphate (ATP)-sensitive potassium (KATP) on the endoplasmic reticulum (ER) membrane to generate the docking assay confinement effect with targetable AIE signal. The amphiphilic AIEgen has for the first time settled down the predicament of unexpected ‘always-on’ fluorescence in the aqueous system and the untargetable aggregation signal in the lipophilic organelle before binding to ER, thus successfully overcoming the bottleneck of AIEgens' targetability.
Very Light Daily Smoking in Young Adults: Relationships Between Nicotine Dependence and Lapse
Authors: Ashe Melinda L , Wilson Stephen J 
Published: August 2020

Abstract

Introduction
Very light daily smoking is increasingly common among young adults. Evidence suggests that levels of nicotine dependence vary significantly among young adults who engage in very light daily smoking. However, the links between dependence and clinically relevant outcomes (eg, lapse) in this population remain unclear. The goal of this study was to address this gap by evaluating how well different nicotine dependence scales predict lapse behavior among very light daily smoking young adults.

Aims and Methods
Very light daily smokers (1–5 cigarettes/day) aged 18–25 participated in an initial laboratory session, during which nicotine dependence was assessed using four commonly used measures: the Fagerstrӧm Test for Cigarette Dependence (FTCD), the Hooked On Nicotine Checklist (HONC), the Transdisciplinary Tobacco Use Research Centers (TTURC) Nicotine Dependence Inventory, and the Wisconsin Inventory of Smoking Dependence Motives (WISDM). After a baseline period, eligible participants (n = 40) completed a 10-day abstinence incentive period in which they attempted to refrain from smoking to earn monetary rewards. Cox proportional hazards models were used to test whether dependence predicted days to first lapse.

Results
FTCD scores significantly predicted days to lapse, as did scores on the FTCD item assessing time to first cigarette of the day (TTFC). No other dependence measures predicted time to lapse. Both the FTCD and TTFC continued to independently predict time to lapse after controlling for smoking frequency and duration.

Conclusions
The FTCD may be a particularly useful tool for capturing clinically meaningful variability in nicotine dependence among young adults who engage in very light daily smoking.

Implications
This is the first study to directly link self-reported nicotine dependence with the ability to achieve and maintain abstinence among very light daily smoking young adults. The results may aid clinicians in selecting among variable measures of nicotine dependence when assessing and treating this population.
Economic Evaluation of Extended Early Intervention Service vs Regular Care Following 2 Years of Early Intervention: Secondary Analysis of a Randomized Controlled Trial
Authors: Groff Michael , Latimer Eric , Joober Ridha , Iyer Srividya N , Schmitz Norbert , Abadi Sherezad , Abdel-Baki Amal , Casacalenda Nicola , Margolese Howard C , Jarvis G Eric , Malla Ashok 
Published: August 2020

Abstract
Cost-effectiveness studies of early intervention services (EIS) for psychosis have not included extension beyond the first 2 years. We sought to evaluate the cost-effectiveness of a 3-year extension of EIS compared to regular care (RC) from the public health care payer’s perspective. Following 2 years of EIS in a university setting in Montreal, Canada, patients were randomized to a 3-year extension of EIS (n = 110) or RC (n = 110). Months of total symptom remission served as the main outcome measure. Resource use and cost data for publicly covered health care services were derived mostly from administrative systems. The incremental cost-effectiveness ratio (ICER) and cost-effectiveness acceptability curve were produced. Relative cost-effectiveness was estimated for those with duration of untreated psychosis (DUP) of 12 weeks or less vs longer. Extended early intervention had higher costs for psychiatrist and nonphysician interventions, but total costs were not significantly different. The ICER was $1627 per month in total remission. For the intervention to have an 80% chance of being cost-effective, the decision-maker needs to be willing to pay $5942 per month of total symptom remission. DUP ≤ 12 weeks was associated with a reduction in costs of $12 276 even if no value is placed on additional months in total remission. Extending EIS for psychosis for people, such as those included in this study, may be cost-effective if the decision-maker is willing to pay a high price for additional months of total symptom remission, though one commensurate with currently funded interventions. Cost-effectiveness was much greater for people with DUP ≤12 weeks.
The Association Between Endplate Changes and Risk for Early Severe Cage Subsidence Among Standalone Lateral Lumbar Interbody Fusion Patients
Authors: Okano Ichiro , Jones Conor , Rentenberger Colleen , Sax Oliver C. , Salzmann Stephan N. , Reisener Marie-Jacqueline , Shue Jennifer , Carrino John A. , Sama Andrew A. , Cammisa Frank P. , Girardi Federico P. , Hughes Alexander P. 
Published: August 2020

Study Design.
Retrospective case series.

Objective.
The aim of this study was to investigate the association of Modic type endplate changes with the risk of severe subsidence after standalone lateral lumbar interbody fusion (SA-LLIF).

Summary of Background Data.
It has been reported that certain endplate radiolographic features are associated with higher regional bone mineral density (BMD) in the adjacent vertebrae in the lumbar spine. It remains unclear whether these changes have protective effects against osteoporotic complications such as cage subsidence after lumbar surgery.

Methods.
We reviewed patients undergoing SA-LLIF from 2007 to 2016 with a follow-up >6 months. Cage subsidence was assessed utilizing the grading system by Marchi et al. As potential contributing factors for cage subsidence, we measured the endplate volumetric BMD (EP-vBMD) and the standard trabecular volumetric BMD measurement in the vertebral body. Modic changes (MC) on magnetic resonance imaging were measured as a qualitative factor for endplate condition. Univariate analysis and multivariate logistic regression analyses with a generalized mixed model were conducted.

Results.
Two hundred six levels in 97 patients were included in the final analysis. Mean age (± SD) was 66.7 ± 10.7. Sisty-sdpercent of the patients were female. Severe subsidence was observed in 66 levels (32.0%). After adjusting for age, bone morphogenetic protein (BMP) use, and number of levels fused, the presence of MC type 2 was significantly associated with lower risk of severe subsidence (OR = 0.28 [0.09–0.88], P = 0.029). Whereas, EP-vBMD did not demonstrate a statistical significance (p = 0.600).

Conclusion.
The presence of a Modic type 2 change was significantly associated with lower odds of severe subsidence after SA-LLIF. Nonetheless, this significant association was independent from regional EP-vBMD values. This finding suggests that microstructural and/or material property changes associated with Modic type 2 changes might have a protective effect in this patient population.

Level of Evidence: 4
Establishment of a Liquid Chromatography-Tandem Mass Spectrometry Method for the Determination of Immunosuppressant Levels in the Peripheral Blood Mononuclear Cells of Chinese Renal Transplant Recipients
Authors: Chen Bing , Lu Jia-Qian , Shao Kun , Zhai Xiao-Hui , An Hui-Min , Shi Hao-Qiang , Zhou Pei-Jun 
Published: August 2020

Background:
Monitoring immunosuppressant levels, such as mycophenolic acid (MPA), cyclosporin A (CsA), and tacrolimus (TAC), in peripheral blood mononuclear cells (PBMCs) could be useful in organ transplant patients administered individualized therapy. The authors developed a liquid chromatography-tandem mass spectrometry assay technique to simultaneously determine immunosuppressant levels in PBMCs and assess their pharmacokinetics in Chinese renal allograft recipients.

Methods:
PBMCs were isolated from the whole blood of 27 Chinese renal transplant patients using Ficoll-Paque Plus solution, and cell number was determined; acetonitrile treatment for protein precipitation, and gradient elution was performed on an Agilent Eclipse XDB-C18 column (3.5 μm, 2.1 × 100 mm) with mobile phase: water and methanol (containing 2 mM ammonium formate); flow rate: 0.3 mL·min−1.

Results:
The calibration curves of MPA, CsA, and TAC had a linear range (ng·mL−1): 0.098–39.2 (r = 0.9987), 0.255–102 (r = 0.9969), and 0.028–11.2 (r = 0.9993), respectively. The extraction effects, matrix effects, and mean relative recovery of these immunosuppressants were 70.4%–93.2%, 72.7%–96.5%, and 90.1%–112.4%, respectively. The within-day and between-day coefficients of variation were <15%. The AUC0–12 of MPA in PBMCs correlated well with those in plasma. The level of MPA, CsA, and TAC in PBMCs might be more stable during dosing interval.

Conclusions:
The derived liquid chromatography-tandem mass spectrometry assay is suitable for simultaneously monitoring different immunosuppressants in PBMCs. Pharmacokinetic of MPA, CsA, and TAC displayed considerable interindividual variability. Intracellular monitoring of immunosuppressants may facilitate individualized therapy for renal allograft recipients.