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Elevated brain temperature under severe heat exposure impairs cortical motor activity and executive function

Journal of Sport and Health Science 2024年第2期13卷 233-244页

作者： Xiang Ren Tan Mary c.Stephenson Sharifah Badriyah Alhadad Kelvin W.Z.Loh Tuck Wah Soong Jason K.W.Lee ivan c.c.low Health and Social Sciences Singapore Institute of TechnologySingapore 138683Singapore Human Potential Translational Research Programme Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117597Singapore centre for Translational Magnetic Resonance Research Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117549Singapore Department of Physiology Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117593Singapore Heat Resilience and Performance centre Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117510Singapore N.1 Institute for Health National University of SingaporeSingapore 117456Singapore campus for Research Excellence and Technological Enterprise(cREATE) Singapore 138602Singapore

Background:Excessive heat exposure can lead to hyperthermia in humans,which impairs physical performance and disrupts cognitive *** heat is a known physiological stressor,it is unclear how severe heat stress affects brain physiology and ***:Eleven healthy participants were subjected to heat stress from prolonged exercise or warm water immersion until their rectal temperatures(T_(re))attained 39.5℃,inducing exertional or passive hyperthermia,*** a separate trial,blended ice was ingested before and during exercise as a cooling *** were compared to a control condition with seated rest(normothermic).Brain temperature(T_(br)),cerebral perfusion,and task-based brain activity were assessed using magnetic resonance imaging ***:T_(br)in motor cortex was found to be tightly regulated at rest(37.3℃±0.4℃(mean±SD))despite fluctuations in T_(re).With the development of hyperthermia,T_(br)increases and dovetails with the rising T_(re).Bilateral motor cortical activity was suppressed during high-intensity plantarflexion tasks,implying a reduced central motor drive in hyperthermic participants(T_(re)=38.5℃±0.1℃).Global gray matter perfusion and regional perfusion in sensorimotor cortex were reduced with passive *** function was poorer under a passive hyperthermic state,and this could relate to compromised visual processing as indicated by the reduced activation of left lateral-occipital ***,ingestion of blended ice before and during exercise alleviated the rise in both T_(re)and T_(bc)and mitigated heat-related neural ***:Severe heat exposure elevates T_(br),disrupts motor cortical activity and executive function,and this can lead to impairment of physical and cognitive performance.

关键词： Brain functional activity cognition Heat stress Hyperthermia Motor function

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Liquid superlubricity of lubricants containing hydroxyl groups and their aqueous solution under rolling/sliding conditions

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Friction 2024年第1期12卷 164-173页

作者： Tomáš POLÁČEK Petr ŠPERKA ivan KŘUPKA Faculty of Mechanical Engineering Brno University of TechnologyBrno 61669Czech Republic

Macroscale rolling/sliding conditions are in the superlubricity,a little-studied topic so *** purpose of this paper is to examine the formation of elastohydrodynamic lubrication(EHL)films by water-based lubricants(glycerol and polyethylene glycol(PEG)),providing superlubricous *** were carried out on an optical ball-on-disc tribometer under rolling/sliding *** film thickness was measured by the thin film colorimetric interferometry,and the viscosity of liquids was measured by rotational and high-pressure falling body *** results show that tribochemical reactions are not the mandatory reason for friction to reach the superlubricity level when using the water-based *** studied liquids themselves are almost *** the addition of water,the signs of shear thinning behavior disappear even *** conditions for this type of lubricant can be predicted using the known Hamrock–Dowson *** anomaly in the thickness of the lubricants was observed as an abrupt change at certain *** more PEG there is in the lubricant,the higher the thickness at the beginning of the jump.

关键词： macroscale superlubricity super low traction water-based lubricants elastohydrodynamic lubrication(EHL) film thickness

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Pelvic fractures in blunt trauma patients:A comparative study

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World Journal of Orthopedics 2024年第5期15卷 418-434页

作者： Alexander A Fokin Joanna Wycech Knight Madison E Tharp Kyler c Brinton Phoebe K Gallagher Justin Fengyuan Xie Russell D Weisz ivan Puente Trauma and critical care Services Delray Medical CenterDelray BeachFL 33484United States charles E Schmidt college of Medicine Department of SurgeryFlorida Atlantic UniversityBoca RatonFL 33431United States Trauma and critical care Services Broward Health Medical CenterFort LauderdaleFL 33316United States charles E Schmidt college of Medicine Florida Atlantic UniversityBoca RatonFL 33431United States Herbert Wertheim college of Medicine Department of SurgeryFlorida International UniversityMiamiFL 33199United States

BAcKGROUND Pelvic fractures(PF)with concomitant injuries are on the rise due to an increase of high-energy *** of the elderly population with age related comorbidities further complicates the *** organ injuries are kindred with PF due to the proximity to pelvic *** of contrast blush(cB)on computed tomography in patients with PF is considered a sign of active bleeding,however,its clinical significance and association with outcomes is *** To analyze polytrauma patients with PF with a focus on the geriatric population,co-injuries and the value of contrast *** This retrospective cohort study included 558 patients with PF admitted to level 1 trauma center(01/2017-01/2023).Analyzed variables included:Age,sex,mechanism of injury(MOI),injury severity score(ISS),Glasgow coma scale(GcS),abbreviated injury scale(AIS),co-injuries,transfusion requirements,pelvic angiography,embolization,laparotomy,orthopedic pelvic surgery,intensive care unit and hospital lengths of stay,discharge disposition and *** study compared geriatric and non-geriatric patients,patients with and without cB and abdominal *** score matching was implemented in comparison *** PF comprised 4%of all trauma admissions.89 patients had cB.286(52%)patients had concomitant injuries including 93(17%)patients with abdominal *** patients compared to non-geriatric had more falls as MOI,lower ISS and AIS pelvis,higher GcS,less abdominal co-injuries,similar cB and angio-embolization rates,less orthopedic pelvic surgeries,shorter lengths of stay and higher *** propensity matching,orthopedic pelvic surgery rates remained lower(8%vs 19%,Pc *** of 89 patients with cB,45(51%)were *** propensity matching,patients with cB compared to without cB had more pelvic angiography(71%vs 12%,P<0.001),hi

关键词： Pelvic fractures Geriatric trauma patients Abdominal co-injuries contrast blush contrast extravasation Angioembolization Polytrauma patients Surgical interventions Blunt trauma External and internal fixation for pelvic stabilization

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Witness for resolution: post-conflict quadratic affiliation in semi-free ranging pigs

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current Zoology 2024年第2期70卷 233-243页

作者： ivan Norscia Edoardo collarini carlo Robino Elena chierto Giada cordoni Department of Life Sciences and Systems Biology University of TorinoVia Accademia Albertina 1310123 TorinoItaly Department of Public Health Sciences and Pediatric s University of TorinoC.So Galileo Galilei 2210126 TorinoItaly

In social mammals,post-conflict resolution can involve the reunion of former opponents(reconciliation),spontaneous/solicited post-conflict affliation of a third party with either opponent(triadic contacts),and affiliation between other individuals(hereafter bystanders;quadratic contacts).Quadratic contacts-possibly informing complex cognitive abilities-have been neglected in post-conflict *** investi-gated quadratic affliation in semi-free ranging pigs Sus scrofa,at the ethical farm Parva-Domus(cavagnolo,Italy).Kinship was *** collected behavioral data on adult pigs(n=104)via video recordings(43 h)followed by video *** and anxiety behaviors between bystanders were collected under post-conflict(Pc;following a conflict between non-bystanders)and matched-control(Mc;no conflict)*** affiliation was present in pigs,as bystanders affliated more in Pc than Mc,and such affiliation was followed by a decrease in the anxiety behaviors of both the interacting ***,quadratic contacts may be partly aimed at reducing one's own anxiety(intrinsic regulation).Quadratic affiliation was highest between closely related bystanders,which suggests that such affiliation may be most effective when close kin is *** affiliation was lowest after reconciliation and spontaneous triadic *** suggests that direct peacemaking between opponents and spontaneous triadic contacts with close kin may most likely replace quadratic ***,pigs can be influenced by the negative events that affect other pigs-but not themselves-and their response may be modulated by social *** non-random quadratic affiliation may point toward the presence of elements of social appraisal abilities inpigs.

关键词： anxiety reduction emotional regulation reconciliation social appraisal triadic contacts.

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Hydrogeochemical and isotopic assessment of the origin of NO_(3)^(−)and N-NH_(3)contents in the aquifer located in a closed lacustrine volcano-sedimentary basin in the metropolitan area of Mexico city

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Acta Geochimica 2024年第4期43卷 719-736页

作者： Jose ivan Morales-Arredondo Maria Aurora Armienta Hernandez Joel Edmundo Ortega-Gutierrez Elisa cuellar Ramirez Natural Resources Department Institute of GeophysicsNational Autonomous University of MexicoCiudad Universitaria No.3000Col.Copilco UniversidadCoyoacán Delegation04360 MexicoCDMXMexico Instituto Politecnico Nacional ***án 55La Laguna Ticoman07340 MexicoCDMXMexico Benemérita Universidad Autónoma de Puebla ciudad Universitaria Col.San ManuelPueblaPueMexico

To explain the presence and spatial distribution of NO_(3)^(−)and N-NH_(3)in the Aquifer of the Metropolitan Area of Mexico city(AMAMc),a hydrogeochemical and isotopic analysis using^(13)c DIc(as well as the stable isotopes^(18)O and^(2)H)in groundwater was *** aquifer is located in an old closed lacustrine volcano-sedimentary basin;some wells hosted in the semi-confined zone contain high N-NH_(3)concentrations,while others present NO_(3)^(−)contents in the recharge zones(hosted in an oxidizing environment).In this study,a change in the isotopic signature(primarily in^(18)O and^(2)H)was observed from the recharge zones to the basin center in some of the wells with high NO_(3)^(−)concentrations,this behavior can be attributed to evaporation during the incorporation of recently infiltrated *** addition,the results for^(13)c(along with ^(2) H)in wells with the highest N-NH_(3)concentrations exhibited an atypically broad range of *** indicated the occurrence of hydrogeochemical and/or biochemical processes in the aquifer(in an oxidizing or reducing environment),such as organic degradation,bacterial decomposition(primarily in the ancient Lake Texcoco and which acts as a natural sink for carbon,nitrogen,sulfur,and phosphorus),besides rock weathering and dissolution,which may be responsible for a very marked isotopic modification of the^(13)c(and,to a lesser extent,2 H).Methanotrophic bacterial activity and methanogenic activity may be related to N-NH_(3)removal processes by oxidation and residual water incorporation respectively,whereas the increase in the NO_(3)^(−)content in some wells is due to the recent contribution of poor-quality water due to contamination.

关键词： 18 O and^(13)c isotopes Iron Hydrogeochemical processes Nitrate Nitrogen species

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Polariton lasing in Mie-resonant perovskite nanocavity

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Opto-Electronic Advances 2024年第4期7卷 27-42页

作者： Mikhail A.Masharin Daria Khmelevskaia Valeriy I.Kondratiev Daria I.Markina Anton D.Utyushev Dmitriy M.Dolgintsev Alexey D.Dmitriev Vanik A.Shahnazaryan Anatoly P.Pushkarev Furkan Isik ivan V.Iorsh ivan A.Shelykh Hilmi V.Demir Anton K.Samusev Sergey V.Makarov UNAM-Institute of Materials Science and Nanotechnology National Nanotechnology Research CenterDepartment of Electrical and Electronics EngineeringDepartment of PhysicsBilkent UniversityAnkara 06800Turkey ITMO University School of Physics and EngineeringSt.Petersburg 197101Russia Abrikosov center for Theoretical Physics MIPTDolgoprudnyiMoscow Region 141701Russia LUMINOUS!center of Excellence for Semiconductor Lighting and Displays School of Electrical and Electronic EngineeringSchool of Physical and Mathematical SciencesSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Department of Physics Engineering Physics and AstronomyQueen’s UniversityKingstonOntario K7L 3N6Canada Science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland Experimentelle Physik 2 Technische Universität DortmundDortmund 44227Germany Qingdao Innovation and Development center Harbin Engineering UniversityQingdao 266000China

Deeply subwavelength lasers(or nanolasers)are highly demanded for compact on-chip bioimaging and sensing at the *** of the main obstacles for the development of single-particle nanolasers with all three dimensions shorter than the emitting wavelength in the visible range is the high lasing thresholds and the resulting *** we ex-ploit exciton-polariton condensation and mirror-image Mie modes in a cuboid csPbBr3 nanoparticle to achieve coherent emission at the visible wavelength of around 0.53μm from its ultra-small(≈0.007μm3 or≈λ3/20)semiconductor *** polaritonic nature of the emission from the nanocavity localized in all three dimensions is proven by direct com-parison with corresponding one-dimensional and two-dimensional waveguiding systems with similar material *** a deeply subwavelength nanolaser is enabled not only by the high values for exciton binding energy(≈35 meV),re-fractive index(>2.5 at low temperature),and luminescence quantum yield of csPbBr3,but also by the optimization of po-laritons condensation on the Mie resonances with quality factors improved by the metallic ***,the key parameters for optimal lasing conditions are intermode free spectral range and phonons spectrum in csPbBr3,which govern polaritons condensation *** chemically synthesized colloidal csPbBr3 nanolasers can be potentially de-posited on arbitrary surfaces,which makes them a versatile tool for integration with various on-chip systems.

关键词： nanolaser perovskite polariton Mie resonance exciton-polariton

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Growth differentiation factor-15 serum concentrations reflect disease severity and anemia in patients with inflammatory bowel disease

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World Journal of Gastroenterology 2024年第13期30卷 1899-1910页

作者： Ante Tonkic Marko Kumric Ivna Akrapovic Olic Doris Rusic Piero Marin Zivkovic Daniela Supe Domic Zeljko Sundov ivan Males Josko Bozic Biology of Neoplasms University of Split School of MedicineSplit 21000Croatia Department of Pathophysiology University of Split School of MedicineSplit 21000Croatia Department of Gastroenterology University Hospital of SplitSplit 21000Croatia Department of Pharmacy University of Split School of MedicineSplit 21000Croatia Department of Medical Laboratory Diagnostics University Hospital of SplitSplit 21000Croatia Department of Health Studies University of SplitSplit 21000Croatia Department of Internal Medicine University of Split School of MedicineSplit 21000Croatia Department of Surgery University Hospital of SplitSplit 21000Croatia

BAcKGROUND Population of patients with inflammatory bowel disease(IBD)is burdened by various extraintestinal manifestations which substantially contribute to greater morbidity and ***-differentiation factor-15(GDF-15)is often overexpressed under stress conditions,such as inflammation,malignancies,heart failure,myocardial ischemia,and many *** To explore the association between GDF-15 and IBD as serum concentrations of GDF-15 were shown to be an independent predictor of poor outcomes in multiple *** additional aim was to determine possible associations between GDF-15 and multiple clinical,anthropometric and laboratory parameters in patients with *** This cross-sectional study included 90 adult patients diagnosed with IBD,encompassing both crohn’s disease(cD)and ulcerative colitis(Uc),and 67 healthy age-and sex-matched *** patients underwent an extensive workup,including colonoscopy with subsequent histopathological *** activity was assessed by two independent gastroenterology consultants specialized in IBD,employing well-established clinical and endoscopic scoring ***-15 serum concentrations were determined following an overnight fasting,using electrochemiluminescence *** In patients with IBD,serum GDF-15 concentrations were significantly higher in comparison to the healthy controls[800(512-1154)pg/mL vs 412(407-424)pg/mL,Pce in GDF-15 was found between patients with cD and Uc[807(554-1451)pg/mL vs 790(509-956)pg/mL,P=0.324].Moreover,multiple linear regression analysis showed that GDF-15 levels predict cD and Uc severity independent of age,sex,and c-reactive protein levels(P=0.016 and P=0.049,respectively).Finally,an association between GDF-15 and indices of anemia was ***,negative correlations were found between GDF-15 and serum iron levels(r=-0.248,P=0.021),as well as GDF-15 and hemoglobin(r=-0.351,P=0.021).Accordingly,in comparison to I

关键词： Inflammatory bowel disease crohn’s disease Ulcerative colitis Growth-differentiation factor-15 Anemia Extraintestinal manifestations

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Influence of donor age on liver transplantation outcomes: A multivariate analysis and comparative study

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 331-344页

作者： Miran Bezjak ivan Stresec Branislav Kocman Stipislav Jadrijević Tajana Filipec Kanizaj Miro Antonijević Bojana Dalbelo Bašić Danko Mikulić Department of Surgery University Hospital MerkurZagreb 10000Croatia Department of Electronics MicroelectronicsComputer and Intelligent SystemsFaculty of Electrical Engineering and ComputingZagreb 10000Croatia Department of Gastroenterology University Hospital MerkurZagreb 10000Croatia Development of Software Nanobit Ltd.Zagreb 10000Croatia

BAcKGROUND The growing disparity between the rising demand for liver transplantation(LT)and the limited availability of donor organs has prompted a greater reliance on older liver ***,utilizing livers from elderly donors has been associated with outcomes inferior to those achieved with grafts from younger *** accounting for additional risk factors,we hypothesize that the utili-zation of older liver grafts has a relatively minor impact on both patient survival and graft *** To evaluate the impact of donor age on LT outcomes using multivariate analysis and comparing young and elderly donor *** In the period from April 2013 to December 2018,656 adult liver transplants were performed at the University Hospital *** multivariate cox propor-tional hazards models were developed to independently assess the significance of donor *** age was treated as a continuous *** approach involved univariate and multivariate analysis,including variable selection and assessment of interactions and ***,to exemplify the similarity of using young and old donor liver grafts,the group of 87 recipients of elderly donor liver grafts(≥75 years)was compared to a group of 124 recipients of young liver grafts(≤45 years)from the *** rates of the two groups were estimated using the Kaplan-Meier method and the log-rank test was used to test the differences between *** Using multivariate cox analysis,we found no statistical significance in the role of donor age within the constructed *** when retained during the entire model development,the donor age's impact on survival remained insignificant and transformations and interactions yielded no substantial effects on *** insigni-ficance and low coefficient values suggest that donor age does not impact patient survival in our ***,there was no statistical evidence that the five developed models did not adhe

关键词： Liver transplantation Elderly donors Survival analysis Postoperative complications cox proportional hazard models

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Association between Helicobacter pylori infection,mismatch repair,HER2 and tumor-infiltrating lymphocytes in gastric cancer

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2487-2503页

作者： carlos A castaneda Miluska castillo Luis A Bernabe Joselyn Sanchez Matteo Fassan Katherine Tello Ignacio ivan Wistuba ivan chavez Passiuri Eloy Ruiz Juvenal Sanchez Fernando Barreda Daniel Valdivia Yaqueline Bazan Milagros Abad-Licham claudio Mengoa Hugo Fuentes Paola Montenegro Ebert Poquioma Raul Alatrista claudio J Flores Luis Taxa Faculty of Health Sciences Universidad Cientifica del SurLima 15038Peru GEcO PERU Grupo de Estudios Clinicos Oncologicos del PeruLima 15038Peru Department of Research Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Faculty of Human Medicine Universidad Ricardo PalmaLima 15039Peru Department of Medicine Surgical Pathology&Cytopathology UnitUniversity of PaduaPadua 35121Italy Department of Translational Molecular Pathology The University of Texas MD Anderson Cancer CenterHoustonTX 77030United States Department of Abdominal Surgery Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Department of Pathology Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Department of Medical Specialties Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Department of Pathology Instituto Regional de Enfermedades Neoplasicas del NorteTrujillo 13001Peru Faculty of Human Medicine Universidad Privada Antenor OrregoTrujillo 13008Peru Department of Surgery Instituto Regional de Enfermedades Neoplasicas del SurArequipa 04002Peru Department of Medical Oncology Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Department of Epidemiology Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Unidad de Investigación Básica y Traslacional Oncosalud-AUNALima 15038Peru Faculty of Medicine Universidad San Martin de PorresLima 15008Peru

BAcKGROUND The influence of Helicobacter-pylori(***)infection and the characteristics of gastric cancer(Gc)on tumor-infiltrating lymphocyte(TIL)levels has not been extensively *** of infiltrating-immune-cell subtypes as well as survival is necessary to obtain comprehensive *** To determine the rates of deficient mismatch-repair(dMMR),HER2-status and *** infection and their association with TIL levels in *** Samples from 503 resected Gc tumors were included and TIL levels were evaluated following the international-TILs-working-group recommendations with assessment of the intratumoral(IT),stromal(ST)and invasive-border(IB)*** density of cD3,cD8 and cD163 immune cells,and dMMR and HER2-status were determined by immunohistochemistry(IHc).*** infection was evaluated by routine histology and quantitative PcR(qPcR)in a subset of *** dMMR was found in 34.4%,HER2+in 5%and ***-positive in 55.7%of *** IT-TIL was associated with grade-3(P=0.038),while ST-TIL with grade-1(Pcurrence(P=0.003).dMMR was associated with high TIL levels in the ST(P=0.019)and IB(P=0.01)compartments,and STcD3(P=0.049)and ST-cD8(P=0.05)***2-was associated with high IT-cD8(P=0.009).*** was associated with high IT-TIL levels(P=0.009)when assessed by routine-histology,and with high TIL levels in the 3 compartments(P=0.002-0.047)and cD8 density in the IT and ST compartments(P=0.001)when assessed by qPcR.A longer overall survival was associated with low IT-cD163(P=0.003)and cD8/cD3(P=0.001 in IT and P=0.002 in ST)and high IT-cD3(P=0.021),ST-cD3(P=0.003)and cD3/cD163(P=0.002).cONcLUSION TIL levels were related to dMMR and *** cD8/cD3 and high cD163/cD3 were associated with lower recurrence and longer survival.

关键词： Lymphocytes Macrophages Gastric cancer Helicobacter pylori HER2 Mismatch repair

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A prospective cohort of men with localized prostate cancer on active surveillance protocol in Hong Kong,china:what did we learn?

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Asian Journal of Andrology 2024年第3期26卷 245-249页

作者： Xiaobo Wu ivan ching-Ho Ko cindy Yeuk-Lam Hong Samuel chi-Hang Yee Jeremy Yuen-chun Teoh Samson Yun-Sang chan Ho-Man Tam chi-Kwok chan chi-Fai Ng Peter Ka-Fung chiu SH Ho Urology centre Department of SurgeryFaculty of MedicineThe Chinese University of Hong KongHong KongChina

This study aimed to report the outcomes of active surveillance(AS)in the management of low-risk prostate cancer(Pca).It recruited87 men who were prospectively followed up according to the Prostate cancer Research International Active Surveillance(PRIAS)protocol with local adaptation at SH Ho Urology centre,Prince of Wales Hospital,Hong Kong,*** investigated the predictorsof disease progression and found that baseline prostate-specific antigen density(PSAD)and the presence of the highest ProstateImaging-Reporting and Data System(PI-RADS)score 5 lesion on magnetic resonance imaging(MRI)are significantly correlatedwith disease ***,men with PSAD>0.2 ng ml^(−2)or PI-RADS 4 or 5 lesions had significantly worse upgradingfree survival compared to those with PSAD≤0.2 ng ml−2 and PI-RADS 2 or 3 *** study concludes that AS is a safe andeffective management strategy for selected patients to defer radical treatment and that most disease progression can be detectedafter the first repeated *** combination of PSAD>0.2 ng ml^(−2)and PI-RADS 4 or 5 lesions may serve as a useful predictorof early disease progression and provide a guide to optimize follow-up protocols for men in different risk groups.

关键词： active surveillance cohort localized prostate cancer

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