bluuebunny/crossref_metadata_2025_split huggingface dataset:
Regularized stable Kerr black hole: cosmic censorships, shadow and quasi-normal modes
Authors: Ghosh Rajes , Rahman Mostafizur , Mishra Akash K. 
Published: January 2023

AbstractBlack hole solutions in general relativity come with pathologies such as singularity and mass inflation instability, which are believed to be cured by a yet-to-be-found quantum theory of gravity. Without such consistent description, one may model theory-agnostic phenomenological black holes that bypass the aforesaid issues. These so-called regular black holes are extensively studied in the literature using parameterized modifications over the black hole solutions of general relativity. However, since there exist several ways to model such black holes, it is important to study the consistency and viability of these solutions from both theoretical and observational perspectives. In this work, we consider a recently proposed model of regularized stable rotating black holes having two extra parameters in addition to the mass and spin of a Kerr solution. We start by computing their quasi-normal modes under scalar perturbation and investigate the impact of those additional parameters on black hole stability. In the second part, we study shadows of the central compact objects in $$M87^*$$

M

87
∗

and $$Sgr\, A^*$$

S
g
r

A
∗

modelled by these regularized black holes and obtain stringent bounds on the parameter space requiring consistency with Event Horizon Telescope observations.
Syntheses and characterization of dithienyl-blocked hexapyrrin and its mononuclear complexes
Authors: Huang Yanping , Fu Yating , Zhu Bin , Baryshnikov Glib , Sun Hao-Ling , Sha Feng , Li Chengjie , Wu Xin-Yan , Ågren Hans , Li Qizhao , Xie Yongshu 
Published: January 2023

With the purpose to develop long chain-conjugated oligopyrrin-like compounds and their metal complexes, and thus achieve tunable near-infrared absorption, a dithienyl-blocked hexapyrrane [Formula: see text] was synthesized by acid-catalyzed [2+4+2] condensation, followed by oxidation with DDQ to afford dithiaoctapyrrin 1, and its mononuclear metal complexes 1-Cu and 1-Zn were synthesized by treating 1 with Cu(II) and Zn(II) acetates. All the compounds were systematically characterized by NMR/EPR, and HRMS. The crystal structures revealed that 1 adopts a double hook-like conformation. Whereas, both complexes 1-Cu and 1-Zn adopt spiral-hook hybrid conformations, showing smaller interplanar angles between the rings within the spiral part, compared with those in the hook-like counterpart of molecule 1, which is favorable for red-shifting the absorption. As expected, the absorption band edges for complexes 1-Cu and 1-Zn are red-shifted to ca. 1560 nm, compared with that of 1260 nm observed for 1.
Fructose Metabolism in Tumor Endothelial Cells Promotes Angiogenesis by Activating AMPK Signaling and Mitochondrial Respiration
Authors: Fang Jian-Hong , Chen Jie-Ying , Zheng Jia-Lin , Zeng Hui-Xian , Chen Jun-Guang , Wu Chen-Hui , Cai Jia-Li , Wang Zhi-Yong , Zhuang Shi-Mei 
Published: January 2023

AbstractAngiogenesis is vital for tumor growth and metastasis. Emerging evidence suggests that metabolic reprogramming in endothelial cells (EC) may affect angiogenesis. Here, we showed that multiple regulators in the fructose metabolism pathway, especially fructose transporter SLC2A5 and fructose-metabolizing enzyme ketohexokinase (KHK), were upregulated in tumor endothelial cells from hepatocellular carcinoma (HCC). In mouse models with hepatoma xenografts or with Myc/sgp53-induced liver cancer, dietary fructose enhanced tumor angiogenesis, tumor growth, and metastasis, which could be attenuated by treatment with an inhibitor of SLC2A5. Furthermore, vessel growth was substantially increased in fructose-containing Matrigel compared with PBS-Matrigel. Inhibiting fructose metabolism in EC cells in vivo using EC-targeted nanoparticles loaded with siRNA against KHK significantly abolished fructose-induced tumor angiogenesis. Fructose treatment promoted the proliferation, migration, and tube formation of ECs and stimulated mitochondrial respiration and ATP production. Elevated fructose metabolism activated AMPK to fuel mitochondrial respiration, resulting in enhanced EC migration. Fructose metabolism was increased under hypoxic conditions as a result of HIF1α-mediated upregulation of multiple genes in the fructose metabolism pathway. These findings highlight the significance of fructose metabolism in ECs for promoting tumor angiogenesis. Restricting fructose intake or targeting fructose metabolism is a potential strategy to reduce angiogenesis and suppress tumor growth.Significance:Fructose metabolism in endothelial cells fuels mitochondrial respiration to stimulate tumor angiogenesis, revealing fructose metabolism as a therapeutic target and fructose restriction as a dietary intervention for treating cancer.
Intratumoral Heterogeneity and Clonal Evolution Induced by HPV Integration
Authors: Akagi Keiko , Symer David E. , Mahmoud Medhat , Jiang Bo , Goodwin Sara , Wangsa Darawalee , Li Zhengke , Xiao Weihong , Dunn Joe Dan , Ried Thomas , Coombes Kevin R. , Sedlazeck Fritz J. , Gillison Maura L. 
Published: January 2023

Abstract

The human papillomavirus (HPV) genome is integrated into host DNA in most HPV-positive cancers, but the consequences for chromosomal integrity are unknown. Continuous long-read sequencing of oropharyngeal cancers and cancer cell lines identified a previously undescribed form of structural variation, “heterocateny,” characterized by diverse, interrelated, and repetitive patterns of concatemerized virus and host DNA segments within a cancer. Unique breakpoints shared across structural variants facilitated stepwise reconstruction of their evolution from a common molecular ancestor. This analysis revealed that virus and virus–host concatemers are unstable and, upon insertion into and excision from chromosomes, facilitate capture, amplification, and recombination of host DNA and chromosomal rearrangements. Evidence of heterocateny was detected in extrachromosomal and intrachromosomal DNA. These findings indicate that heterocateny is driven by the dynamic, aberrant replication and recombination of an oncogenic DNA virus, thereby extending known consequences of HPV integration to include promotion of intratumoral heterogeneity and clonal evolution.

Significance:
Long-read sequencing of HPV-positive cancers revealed “heterocateny,” a previously unreported form of genomic structural variation characterized by heterogeneous, interrelated, and repetitive genomic rearrangements within a tumor. Heterocateny is driven by unstable concatemerized HPV genomes, which facilitate capture, rearrangement, and amplification of host DNA, and promotes intratumoral heterogeneity and clonal evolution.
See related video: https://vimeo.com/845407469
See related commentary by McBride and White, p. 814.
This article is highlighted in the In This Issue feature, p. 799
The Greek Crisis Under Structural Constraints
Authors: Xie Fusheng , Wang Jiateng , Li Zhi 
Published: January 2023

This article studies the Greek crisis since 2009 with a synthesized Marxian framework by embedding the Greek capital accumulation process into the capitalist core-periphery structure in the European Union, which deteriorated the competitiveness of Greece and adversely impacted its capital accumulation, leading to a relatively low profit rate in the neoliberal era. Institutions of the European Union helped Greece turn to debt-driven accumulation to sustain growth, especially the external debt of government, but the weak productive accumulation because of relatively low profit rate made the accumulation of debt unsustainable in the long run. When doubt was cast on Greece’s capacity to repay its debts, the economy lost external sources of funding, leading to a halt in debt expansion and the burst of the sovereign debt crisis. JEL Classification: E11, F02, O10
Caregivers’ perceptions of compulsory treatment of physical illness in involuntarily psychiatric hospitalization
Authors: Joury Sophie , Asman Oren , Gold Azgad 
Published: January 2023

Background Physical morbidity is rife among patients with serious mental illness. When they are involuntarily hospitalized and even treated, they may still refuse treatment for physical illness leading clinicians to wonder about the ethics of coercing such treatments. Research aim This survey study explored psychiatric caregivers’ perceptions on whether compulsory treatment of physical illness is legal and whether it is justifiable in patients with serious mental illness and under what circumstances. Research design A questionnaire that included two case vignettes of an involuntarily hospitalized psychiatric patient with diabetes refusing treatment with insulin for various reasons. The cases differed in terms of diabetes severity. Participants answered questions regarding the appropriateness of involuntary treatment. Participants and research context Psychiatric medical doctors and nurses working in a mental health center. ( N = 89, 50 female, ages 26–66). Ethical considerations The study was approved by the Medical Centre Institutional Review Board (IRB) and the University Ethics Committee. The respondents’ anonymity was kept. Participation was voluntary and consent was obtained. Results The severity of the patient’s medical condition and their reason for refusing treatment were associated with participants’ willingness to give insulin despite patient objection [( F(1, 87) = 49.41, p < .01; ( F(1, 87) = 33.44, p < .01), respectively]. Participants were more inclined to support compulsory treatment if the patient’s refusal was “illness-oriented” (i.e. directly related to psychiatric illness). Participants presented diverse views regarding the perceived legality of compulsory treatment of physical illness in such situations (illegal 63.09%; legal 23.8%; 13% unsure). The majority (53.5%–55.3%) of those who thought it was illegal supported compulsory treatment in high-severity, illness-oriented refusal situations. Conclusions The severity of the medical condition and the reason for treatment refusal influence psychiatric caregivers’ willingness to provide compulsory treatment for physical illness in involuntary hospitalized psychiatric patients. Beyond the legal framework, ethical guidelines for these situations are warranted, while decisions should be made on a case-by-case basis.
Commentary on alignment of medical student assessment and vocational training in psychiatry and addiction medicine
Authors: Looi Jeffrey CL , Bonner Daniel , Maguire Paul A , Brazel Matthew , Keightley Philip , Reay Rebecca E , Tedeschi Michael 
Published: January 2023

Objective To comment upon the potential for alignment of medical student assessment and vocational specialist training through the RANZCP-CanMEDS model of Entrustable Professional Activities (EPAs) and Workplace-Based Assessments (WBAs). We discuss a specific post hoc example of such an alignment in an Australian graduate medical school in Psychiatry and Addiction Medicine. Conclusions Vocational training models of assessment, such as the RANZCP specialist training program for psychiatrists, can potentially be mapped to medical student education in formative and summative assessment through CanMEDs-based EPAs and WBAs, to assist in transition to specialist training.
Blown film stability for low, medium, and high molecular weight polylactic acid and their tensile properties
Authors: Licea-Saucedo Daniel C , Rodrigue Denis , Cisneros-López Erick O , González-Núñez Rubén 
Published: January 2023

Three poly (lactic acid) (PLA) resins with molecular weight (Mw) equal to 55 (3251D), 125 (L105) and 163 (LX175) kg/mol were characterized in terms of capillary viscosity, mechanical and thermal properties and used to produce blown films. The effect of temperature, extrusion rate, stretching (TUR) and blow-up (BUR) ratios were evaluated to determine the optimum processing conditions for blown films based on the bubble stability and to determine their final tensile properties. As expected, the processing temperature was the most critical parameter on the film stability. The lower Mw PLA showed limited processing stability. Stable conditions were found at higher temperature (200°C) for higher Mw. These results correlate with the PLA viscosity (melt strength). Finally, the PLA film tensile strength (TS) strongly depended on their processability. For example, 3251D and L105 required high stretching (TUR = 3.4 and 7) for maximum TS (30 and 64 MPa) with a low blow-up ratio (BUR = 1.02–1.15). However, a moderate increase in BUR (10% at TUR = 3) led to a substantial drop in TS (from 29 MPa to 21 MPa for PLA 3251D and 44 MPa–34 MPa for L105). Overall, LX175 was the most interesting resin with 49 MPa TS which was independent of the BUR and TUR used in this investigation.
Lung Ultrasound and High-Resolution Computed Tomography in Suspected COVID-19 Patients Admitted to the Emergency Department: A Comparison
Authors: Sofia Soccorsa , Orlandi Paolo , Bua Vincenzo , Imbriani Michele , Cecilioni Laura , Caruso Alessandra , Schiavone Cosima , Boccatonda Andrea , Cianci Antonella , Spampinato Michele Domenico 
Published: January 2023

Objective: To analyze the diagnostic accuracy of lung ultrasonography (LUS) and high-resolution computed tomography (HRCT), to detect COVID-19. Materials and Methods: This study recruited all patients admitted to the emergency medicine unit, due to a suspected COVID-19 infection, during the first wave of the COVID-19 pandemic. These patients also who underwent a standardized LUS examination and a chest HRCT. The signs detected by both LUS and HRCT were reported, as well as the sensitivity, specificity, positive predictive value, and negative predictive value for LUS and HRCT. Results: This cohort included 159 patients, 101 (63%) were diagnosed with COVID-19. COVID-19 patients showed more often confluent subpleural consolidations and parenchymal consolidations in lower lung regions of LUS. They also had “ground glass” opacities and “crazy paving” on HRCT, while pleural effusion and pulmonary consolidations were more common in non-COVID-19 patients. LUS had a sensitivity of 0.97 (95% CI 0.92–0.99) and a specificity of 0.24 (95% CI 0.07–0.5) for COVID-19 lung infections. HRCT abnormalities resulted in a 0.98 sensitivity (95% CI 0.92–0.99) and 0.1 specificity (95% CI 0.04–0.23) for COVID-19 lung infections. Conclusion: In this cohort, LUS proved to be a noninvasive, diagnostic tool with high sensitivity for lung abnormalities that were likewise detected by HRCT. Furthermore, LUS, despite its lower specificity, has a high sensitivity for COVID-19, which could prove to be as effective as HRCT in excluding a COVID-19 lung infection.
Anthocyanin metabolism in Nelumbo: translational and post-translational regulation control transcription
Authors: Liu Xiaojing , Du Fengfeng , Sun Linhe , Li Jinfeng , Chen Shaozhou , Li Naiwei , Chang Yajun , cui Jian , chen Wen , Yao Dongrui 
Published: January 2023

Abstract
Background
Lotus (Nelumbo Adans.) is used as an herbal medicine and the flowers are a source of natural flavonoids. ‘Da Sajin’, which was firstly found in the plateau area, is a natural mutant in flower color with red streamers dyeing around white petals.

Results
The LC–MS-MS results showed that eight anthocyanin compounds, including cyanidin 3-O-glucoside, cyanidin 3-O-galactoside, malvidin 3-O-galactoside, and malvidin 3-O-glucoside, were differentially enriched in red-pigmented tissues of the petals, whereas most of these metabolites were undetected in white tissues of the petals. Transcriptome profiling indicated that the relative high expression levels of structural genes, such as NnPAL, NnF3H, and NnANS, was inconsistent with the low anthocyanin concentration in white tissues. Members of the NnMYB and NnbHLH transcription factor families were presumed to play a role in the metabolic flux in the anthocyanin and proanthocyanidin biosynthetic pathway. The expression model of translational initiation factor, ribosomal proteins and SKP1–CUL1–F-box protein complex related genes suggested an important role for translational and post-translational network in anthocyanin biosynthesis. In addition, pathway analysis indicated that light reaction or photo destruction might be an important external cause for floral color determination in lotus.

Conclusions
In this study, it is supposed that the natural lotus mutant ‘Da Sajin’ may have originated from a red-flowered ancestor. Partial loss of anthocyanin pigments in petals may result from metabolic disorder caused by light destruction. This disorder is mainly regulated at post translation and translation level, resulting in a non-inherited phenotype. These results contribute to an improved understanding of anthocyanin metabolism in lotus, and indicate that the translational and post-translational regulatory network determines the metabolic flux of anthocyanins and proanthocyanidins under specific environmental conditions.
Transcriptome analysis of barley (Hordeum vulgare L.) under waterlogging stress, and overexpression of the HvADH4 gene confers waterlogging tolerance in transgenic Arabidopsis
Authors: Luan Haiye , Li Hongtao , Li Yu , Chen Changyu , Li Shufeng , Wang Yu , Yang Ju , Xu Meng , Shen Huiquan , Qiao Hailong , Wang Jun 
Published: January 2023

Abstract
Background
Waterlogging is one of the major abiotic stresses in barley and greatly reduces grain yield and quality. To explore the mechanism controlling waterlogging tolerance in barley, physiological, anatomical and transcriptional analyses were performed in two contrasting barley varieties, viz. Franklin (susceptible) and TX9425 (tolerant).

Results
Compared to Franklin, TX9425 had more adventitious roots and aerenchymas and higher antioxidant enzyme activities. A total of 3064 and 5693 differentially expressed genes (DEGs) were identified in TX9425 after 24 h and 72 h of waterlogging treatment, respectively, while 2297 and 8462 DEGs were identified in Franklin. The results suggested that TX9425 was less affected by waterlogging stress after 72 h of treatment. The DEGs were enriched mainly in energy metabolism, hormone regulation, reactive oxygen species (ROS) scavenging, and cell wall-modifying enzymes. Alcohol dehydrogenase (ADH) plays an important role in response to waterlogging stress. We found that HvADH4 was significantly upregulated under waterlogging stress in TX9425. Transgenic Arabidopsis overexpressing HvADH4 displayed higher activity of antioxidant enzymes and was more tolerant to waterlogging than the wild type (WT).

Conclusions
The current results provide valuable information that will be of great value for the exploration of new candidate genes for molecular breeding of waterlogging tolerance in barley.
Hyperuricemia exacerbates abdominal aortic aneurysm formation through the URAT1/ERK/MMP-9 signaling pathway
Authors: Wang Jen-Chun , Tsai Shih-Hung , Tsai Hsiao-Ya , Lin Shing-Jong , Huang Po-Hsun 
Published: January 2023

Abstract
Objective
Previous studies have revealed associations between hyperuricemia and microvascular diseases, but the association between hyperuricemia and abdominal aortic aneurysm (AAA) remains unclear. The aim of this study was to elucidate the pathogenesis and prove the relationship between AAA and hyperuricemia.

Methods
A retrospective study was performed to validate the growth rates of AAA in humans with different serum uric acid levels. A murine model of angiotensin II-induced AAA was used to assess the effects of hyperuricemia on AAA growth in vivo, and human aortic smooth muscle cells (HASMCs) were used to study the pathways involved in these effects in vitro.

Results
We analyzed data from 107 AAA patients and found that patients with serum uric acid levels above 9 mg/dl had higher AAA growth rates than patients with serum uric acid levels between 4 and 7.9 mg/dl. In vivo, induction of hyperuricemia increased the incidence of AAA formation and the abdominal aortic diameter in mice. The hyperuricemic mice exhibited higher levels of urate transporter 1 (URAT1) expression, phospho-extracellular signal-regulated kinase (p-ERK)1/2 expression, reactive oxygen species (ROS) levels and matrix metalloproteinase (MMP)-9 expression in the abdominal aorta than the control mice. Soluble uric acid increased the expression of URAT1, p-ERK1/2, and MMP-9 and the levels of ROS in HASMCs in vitro.

Conclusions
We have provided human evidence that hyperuricemia exacerbates AAA formation. In addition, our murine experimental evidence suggests that hyperuricemia exacerbates AAA formation and reveals that the URAT1/ERK1/2/ROS/MMP-9 pathway is among the pathways activated by uric acid in HASMCs.
Tinetti balance performance is associated with mortality in older adults with late-onset Parkinson’s disease: a longitudinal study
Authors: Laurent Louise , Koskas Pierre , Estrada Janina , Sebbagh Mélanie , Lacaille Sophie , Raynaud-Simon Agathe , Lilamand Matthieu 
Published: January 2023

Abstract
Background
Parkinson’s disease (PD) is associated with a 3-fold mortality risk, which is closely related to advancing age. Evidence is lacking regarding the factors associated with the risks of mortality or nursing-home (NH) admission, in elderly patients with PD. We aimed at identifying the clinical characteristics associated with these outcomes, in older community-dwelling patients with late-onset PD.

Methods
Retrospective, observational analysis of data from geriatric day hospital patients. Motor assessment included Unified Parkinson Disease Rating Scale (UPDRS) part III score, Tinetti Performance Oriented Mobility Assessment (POMA) balance and gait tests, and gait speed. Levodopa equivalent dose, comorbidity, cognitive performance, Activities of Daily Living performance were examined. Cox proportional hazards models were performed to identify the factors associated with mortality and NH admission rate (maximum follow-up time = 5 years).

Results
We included 98 patients, mean age 79.4 (SD = 5.3) of whom 18 (18.3%) died and 19 (19.4%) were admitted into NH, over a median follow-up of 4 years. In multivariate Cox models, poor balance on the Tinetti POMA scale (HR = 0.82 95%CI (0.66–0.96), p = .023) and older age (HR = 1.12 95%CI (1.01–1.25), p = .044) were the only variables significantly associated with increased mortality risk. A Tinetti balance score below 11/16 was associated with a 6.7 hazard for mortality (p = .006). No specific factor was associated with NH admissions.

Conclusions
Age and the Tinetti POMA score were the only factors independently associated with mortality. The Tinetti POMA scale should be considered for balance assessment and as a screening tool for the most at-risk individuals, in this population.