339 research outputs found
Comment on Maravelis et al. “Accretionary prism-forearc interactions as reflected in the sedimentary fill of southern Thrace Basin (Lemnos Island, NE Greece)”
This contribution is intended to shed light on the content of the paper by Maravelis et al. (2015) about the evolution of the island of Limnos, a small portion of the Cenozoic Thrace Basin (Turkey, Greece and Bulgaria). Although we appreciate their approach to use sediment provenance for paleotectonic reconstructions, we have concerns how this subject has been dealt with and how it is presented to the scientific community. Most of our criticism is about the attempt of Maravelis et al. to provide a review of the evolution of the Thrace Basin using (1) an inadequate dataset, (2) an inadequate area (Limnos is <5 % of the Thrace Basin) and (3) the interpretation provided by different authors in previous papers without properly citing the source of the information
Dating of the oldest continental sediments from the Himalayan foreland basin
A detailed knowledge of Himalayan development is important for our wider understanding of several global processes, ranging from models of plateau uplift to changes in oceanic chemistry and climate(1-4). Continental sediments 55 Myr old found in a foreland basin in Pakistan(5) are, by more than 20 Myr, the oldest deposits thought to have been eroded from the Himalayan metamorphic mountain belt. This constraint on when erosion began has influenced models of the timing and diachrony of the India-Eurasia collision(6-8), timing and mechanisms of exhumation(9,10) and uplift(11), as well as our general understanding of foreland basin dynamics(12). But the depositional age of these basin sediments was based on biostratigraphy from four intercalated marl units(5). Here we present dates of 257 detrital grains of white mica from this succession, using the Ar-40-(39) Ar method, and find that the largest concentration of ages are at 36-40 Myr. These dates are incompatible with the biostratigraphy unless the mineral ages have been reset, a possibility that we reject on the basis of a number of lines of evidence. A more detailed mapping of this formation suggests that the marl units are structurally intercalated with the continental sediments and accordingly that biostratigraphy cannot be used to date the clastic succession. The oldest continental foreland basin sediments containing metamorphic detritus eroded from the Himalaya orogeny therefore seem to be at least 15-20 Myr younger than previously believed, and models based on the older age must be re-evaluated
Increase of circulating cell free mitochondrial DNA in amateur boxers after sparring matches
Objectives: To determine if circulating mitochondrial deoxyribonucleic acid levels increase after sport activity involving blows to the head, such as boxing, and if it could play a role in inflammatory cascade regulation in response to trauma. Design: Observational, longitudinal. Methods: We measured mitochondrial deoxyribonucleic acid levels and integrity in ten non-professional male boxers before and after three weekly sparring matches. We set up a protocol to separate three different plasma fractions enriched in mitochondria-containing vesicles, mitochondrial deoxyribonucleic acid bound to proteins and naked mitochondrial deoxyribonucleic acid. We quantified the levels of the main cytokines involved in inflammatory response and the levels of neurofilament light, a well-known marker of brain damage. Results: Circulating mitochondrial deoxyribonucleic acid levels increased after each match. In the second fraction, we also observed an increase over the weeks. Mitochondrial deoxyribonucleic acid is less intact after each match if compared with pre-match integrity, especially the naked form which is not protected within vesicles or mitochondria. Circulating levels of interleukin-6, interleukin-1beta and interleukin-10 increased after each match linking traumatic brain injuries to inflammatory state. Neurofilament light chain showed a similar trend to mitochondrial deoxyribonucleic acid. Conclusions: As mitochondrial deoxyribonucleic acid displays an inflammatory effect and neurofilament light chain is more specific for brain injury, we concluded that the simultaneous analysis of these two parameters could be helpful to monitor the effects of traumatic brain injury in contact sports, and that mitochondrial deoxyribonucleic acid is a promising candidate biomarker to study the inflammatory state of patients who suffered repeated traumatic brain injuries
Angiopoietin-2 and the Vascular Endothelial Growth Factor Promote Migration and Invasion in Hepatocellular Carcinoma- and Intrahepatic Cholangiocarcinoma-Derived Spheroids
Aggressive hepatocellular carcinoma (HCC) overexpressing Angiopoietin-2 (ANG-2) (a protein linked with angiogenesis, proliferation, and epithelial–mesenchymal transition (EMT)), shares 95% of up-regulated genes and a similar poor prognosis with the proliferative subgroup of intrahepatic cholangiocarcinoma (iCCA). We analyzed the pro-invasive effect of ANG-2 and its regulator vascular endothelial growth factor (VEGF) on HCC and CCA spheroids to uncover posUsible common ways of response. Four cell lines were used: Hep3B and HepG2 (HCC), HuCC-T1 (iCCA), and EGI-1 (extrahepatic CCA). We treated the spheroids with recombinant human (rh) ANG-2 and/or VEGF and then observed the changes at the baseline, after 24 h, and again after 48 h. Proangiogenic stimuli increased migration and invasion capability in HCC- and iCCA-derived spheroids and were associated with a modification in EMT phenotypic markers (a decrease in E-cadherin and an increase in N-cadherin and Vimentin), especially at the migration front. Inhibitors targeting ANG-2 (Trebananib) and the VEGF (Bevacizumab) effectively blocked the migration ability of spheroids that had been stimulated with rh-ANG-2 and rh-VEGF. Overall, our findings highlight the critical role played by ANG-2 and the VEGF in enhancing the ability of HCC- and iCCA-derived spheroids to migrate and invade, which are key processes in cancer progression
Association Between Total Number of Deaths, Diabetes Mellitus, Incident Cancers, and Haplotypes in Chromosomal Region 8q24 in a Prospective Study
n/
Differential Impact of Tumor Endothelial Angiopoietin-2 and Podoplanin in Lymphatic Endothelial Cells on HCC Outcomes with Tyrosine Kinase Inhibitor Treatment According to Sex
Hepatocellular carcinoma (HCC) is the second leading cause of cancer death worldwide. Curative treatments are available to a minority of patients, as HCC is often diagnosed at an advanced stage. For patients with unresectable and multifocal HCC, tyrosine kinase inhibitor drugs (TKIs) are the only potential treatment option. Despite extensive research, predictors of response to these therapies remain elusive. This study aimed to analyze the biological and histopathological characteristics of HCC patients treated with TKIs, focusing on angiogenesis and lymphangiogenesis. Immunohistochemistry quantified the expression of angiopoietin-2 (Ang2), lymphatic endothelial cells (LEC) podoplanin, and C-type Lectin Domain Family 2 (CLEC-2), key factors in neoangiogenesis and lymphangiogenesis. An increased expression of endothelial Ang2 and LEC podoplanin predicted a lower risk of metastasis. Female patients had significantly longer overall survival and survival on TKIs, associated with higher tumor expression of endothelial Ang2 and LEC podoplanin. Moreover, LEC podoplanin expression and a longer time on TKIs were independently correlated with improved survival on TKI therapy at Cox regression analysis. These findings suggest that endothelial Ang2 and LEC podoplanin could be potential biomarkers for predicting treatment outcomes and guiding therapeutic strategies in HCC patients treated with TKIs
Deciphering Earth's Movements: Unveiling Subsidence and Displacement in Capo Colonna Through SAR and CGPS
This study investigates the subsidence phenomenon in the Capo Colonna area (Calabria, southern Italy) using Synthetic Aperture Radar (SAR) data from C and X bands, and Continuous Global Positioning System (CGPS) measurements collected between 2003 and 2018. Persistent Scatterer Pair Differential Interferometry Synthetic Aperture Radar (PSP-DIFSAR) and Small Baseline Subset (SBAS) techniques were employed to produce detailed deformation maps. With ascending and descending datasets from various satellites, along with acquisition parameters such as incidence and heading angles, the Line of Sight (LOS) measurements were decomposed into vertical and east-west displacement components. This provided a comprehensive understanding of the displacement rates in the Capo Colonna peninsula, revealing significant subsidence patterns, particularly in the promontory. Varied deformation rates were observed across different sectors, with higher rates in the peninsula than in Crotone's hinterland and urban areas. The complementary comparison between SAR and CGPS data offered critical insights into the region's geodynamic behavior, enhancing risk assessment and management strategies to preserve its geological and archaeological heritage
Early menopause is associated with lack of response to antiviral therapy in women with chronic hepatitis C.
BACKGROUND AND AIMS:
Chronic hepatitis C (CHC) and liver fibrosis progress more rapidly in men and menopausal women than in women of reproductive age. We investigated the associations among menopause, sustained virologic response (SVR), and liver damage in patients with CHC.
METHODS:
We performed a prospective study of 1000 consecutive, treatment-naïve patients 18 years of age and older with compensated liver disease from CHC. Liver biopsy samples were analyzed (for fibrosis, inflammation, and steatosis) before patients received standard antiviral therapy. From women (n = 442), we collected data on the presence, type, and timing of menopause; associated hormone and metabolic features; serum levels of interleukin-6; and hepatic tumor necrosis factor (TNF)-α.
RESULTS:
Postmenopausal women achieved SVRs less frequently than women of reproductive age (46.0% vs 67.5%; P < .0001) but as frequently as men (51.1%; P = .283). By multivariate regression analysis, independent significant predictors for women to not achieve an SVR were early menopause (odds ratio [OR], 8.055; 95% confidence interval [CI], 1.834-25.350), levels of γ-glutamyl transpeptidase (OR, 2.165; 95% CI, 1.364-3.436), infection with hepatitis C virus genotype 1 or 4 (OR, 3.861; 95% CI, 2.433-6.134), and cholesterol levels (OR, 0.985; 95% CI, 0.971-0.998). Early menopause was the only independent factor that predicted lack of an SVR among women with genotype 1 hepatitis C virus infection (OR, 3.933; 95% CI, 1.274-12.142). Baseline levels of liver inflammation, fibrosis, steatosis, serum interleukin-6 (P = .04), and hepatic TNF-α (P = .007) were significantly higher among postmenopausal women than women of reproductive age.
CONCLUSIONS:
Among women with CHC, early menopause was associated with a low likelihood of SVR, probably because of inflammatory factors that change at menopause
Benefits and pitfalls of multimedia and interactive features in technology-enhanced storybooks:A meta-analysis
A meta-analysis was conducted on the effects of technology-enhanced stories for young children’s literacy development when compared to listening to stories in more traditional settings like storybook reading. A small but significant additional benefit of technology was found for story comprehension (g+ = 0.17) and expressive vocabulary (g+ = 0.20), based on data from 2,147 children in 43 studies. When investigating the different characteristics of technology-enhanced stories, multimedia features like animated pictures, music, and sound effects were found beneficial. In contrast, interactive elements like hotspots, games, and dictionaries were found to be distracting. Especially for children disadvantaged because of less stimulating family environments, multimedia features were helpful and interactive features were detrimental. Findings are discussed from the perspective of cognitive processing theories
Altered Expression of the Epithelial Mucin MUC1 Accompanies Endoscopic Recurrence of Postoperative Crohn's Disease
Background:MUC1-glycoprotein is expressed at low levels and in fully glycosylated form on epithelial cells. Inflammation causes MUC1 overexpression and hypoglycosylation. We hypothesized that overexpression of hypoglycosylated MUC1 would be found in postoperative Crohn's disease (CD) recurrence and could be considered an additional biomarker of recurrence severity.Methods:We examined archived neo-terminal ileum biopsies from patients with prior ileocecal resection who had postoperative endoscopic assessment of CD recurrence and given a Rutgeerts ileal recurrence score. Consecutive tissue sections were stained using 2 different anti-MUC1 antibodies, HMPV that recognizes all forms of MUC1 and 4H5 that recognizes only inflammation-associated hypoglycosylated MUC1.Results:A total of 71 postoperative CD patients were evaluated. There was significant increase in MUC1 expression of both glycosylated/normal (P<0.0001) and hypoglycosylated/abnormal (P<0.0001) forms in patients with severe endoscopic CD recurrence (i3+i4), ileal score i2, compared with patients in endoscopic remission (i0+i1). Results were similar regardless of anti-TNF-α use. Although MUC1 expression and Rutgeerts scores were in agreement when characterizing the majority of cases, there were a few exceptions where MUC1 expression was characteristic of more severe recurrence than implied by Rutgeerts score.Conclusions:MUC1 is overexpressed and hypoglycosylated in neo-terminal ileum tissue of patients with postoperative CD recurrence. Increased levels are associated with more severe endoscopic recurrence scores, and this is not influenced by anti-TNF-α use. Discrepancies found between Rutgeerts scores and MUC1 expression suggest that addition of MUC1 as a biomarker of severity of postoperative CD recurrence may improve categorization of recurrence status and consequently treatment decisions. © 2021 Lippincott Williams and Wilkins. All rights reserved
- …
