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Porcupine inhibition is a promising pharmacological treatment for severe sclerosteosis pathologies
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作者 Timothy J.Dreyer Jacob A.C.Keen +5 位作者 Leah M.Wells Mark Hopkinson Isabel R.Orriss Gill Holdsworth Andrew A.Pitsillides Scott J.Roberts 《Bone Research》 2025年第4期866-881,共16页
Sclerosteosis,an ultra-rare disorder characterised by high bone mass(HBM)and skeletal overgrowth,leads to facial paralysis,hearing loss and raised intracranial pressure,which is currently managed only through high-ris... Sclerosteosis,an ultra-rare disorder characterised by high bone mass(HBM)and skeletal overgrowth,leads to facial paralysis,hearing loss and raised intracranial pressure,which is currently managed only through high-risk surgery.Sclerosteosis is caused by SOST mutations and loss of functional sclerostin,a protein that suppresses osteogenesis by antagonising Wnt/β-catenin signalling.Herein,using in vitro and in vivo approaches,we explore whether LGK974,another potent Wnt inhibitor that targets porcupine(PORCN,Wnt-specific acyltransferase),is a promising sclerosteosis therapeutic.In vitro assays showed that 100 nmol/L LGK974 significantly reduced osteoblast alkaline phosphatase(ALP)activity/mineralisation,decreased Wnt/osteoblast marker(Axin2,Runx2 and Ocn)expression,and downregulated ossification and the Wnt signalling pathway,without affecting osteoclast numbers/resorption.To assess in vivo effects,6-week-old male and female Sost deficient(Sost-/-)mice received LGK974 for 4 weeks and right hindlimbs were subjected to 20 N peak loading to assess mechanoadaptive interactions.µCT revealed significant reductions in vertebral trabecular number and lower cortical bone volume in loaded and non-loaded tibiae in male and female LGK974-treated Sost-/-mice.Interestingly,the target engagement biomarker Axin2 was only significantly reduced in male vertebrae,which may indicate differences in male and female response to LGK974.This study also shows that PORCN inhibition may effectively limit characteristic HBM and skeletal overgrowth in sclerosteosis patients at sites with severe pathology. 展开更多
关键词 sost mutations suppresses osteogenesis wnt catenin signalling porcupine inhibition vitro vivo approacheswe sclerosteosis OSTEOGENESIS lgk
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Ensemble of Deep Learning with Crested Porcupine Optimizer Based Autism Spectrum Disorder Detection Using Facial Images
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作者 Jagadesh Balasubramani Surendran Rajendran +1 位作者 Mohammad Zakariah Abeer Alnuaim 《Computers, Materials & Continua》 2025年第5期2793-2807,共15页
Autism spectrum disorder(ASD)is a multifaceted neurological developmental condition that manifests in several ways.Nearly all autistic children remain undiagnosed before the age of three.Developmental problems affecti... Autism spectrum disorder(ASD)is a multifaceted neurological developmental condition that manifests in several ways.Nearly all autistic children remain undiagnosed before the age of three.Developmental problems affecting face features are often associated with fundamental brain disorders.The facial evolution of newborns with ASD is quite different from that of typically developing children.Early recognition is very significant to aid families and parents in superstition and denial.Distinguishing facial features from typically developing children is an evident manner to detect children analyzed with ASD.Presently,artificial intelligence(AI)significantly contributes to the emerging computer-aided diagnosis(CAD)of autism and to the evolving interactivemethods that aid in the treatment and reintegration of autistic patients.This study introduces an Ensemble of deep learning models based on the autism spectrum disorder detection in facial images(EDLM-ASDDFI)model.The overarching goal of the EDLM-ASDDFI model is to recognize the difference between facial images of individuals with ASD and normal controls.In the EDLM-ASDDFI method,the primary level of data pre-processing is involved by Gabor filtering(GF).Besides,the EDLM-ASDDFI technique applies the MobileNetV2 model to learn complex features from the pre-processed data.For the ASD detection process,the EDLM-ASDDFI method uses ensemble techniques for classification procedure that encompasses long short-term memory(LSTM),deep belief network(DBN),and hybrid kernel extreme learning machine(HKELM).Finally,the hyperparameter selection of the three deep learning(DL)models can be implemented by the design of the crested porcupine optimizer(CPO)technique.An extensive experiment was conducted to emphasize the improved ASD detection performance of the EDLM-ASDDFI method.The simulation outcomes indicated that the EDLM-ASDDFI technique highlighted betterment over other existing models in terms of numerous performance measures. 展开更多
关键词 Autism spectrum disorder ensemble learning crested porcupine optimizer facial images computeraided diagnosis
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On the Ingenious Use of the Montage Strategies in Julian Barnes’s Novel The Porcupine
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作者 HE Zhao-hui 《Journal of Literature and Art Studies》 2025年第3期115-125,共11页
Written by Julian Barnes,a well-known contemporary British writer,The Porcupine is a novel with a touch on Bulgaria’s social realities in the early 1990s.However,it is not a realistic novel in a conventional sense.It... Written by Julian Barnes,a well-known contemporary British writer,The Porcupine is a novel with a touch on Bulgaria’s social realities in the early 1990s.However,it is not a realistic novel in a conventional sense.It is composed of forty-three sections,long or short,fragmented in form and laid out by means of montage strategies.In the novel,Barnes used“continuous montage”and“parallel montage”strategies to unveil the plot and tell the story and employed“psychological montage”and“contrast montage”strategies to showcase characters’consciousness and personalities.The ingenious use of different montage strategies in the novel challenges the linear narrative paradigm in traditionally realistic novels,enriches its narrative structures and textual dimensions,and highlights its dramatic conflict,hence reflecting the narrative innovation in Barnes’s fictional writing and providing new space for the studies of his novels from the viewpoint of narratology and/or postmodernism. 展开更多
关键词 Julian Barnes The porcupine montage strategies narrative innovation
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北大西洋Porcupine Seabight海区第四纪原始生产力
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作者 李祥辉 Akihiro KANO +4 位作者 陈云华 Chiduru TAKASHIMA 徐文礼 徐宝亮 王汝建 《中国科学:地球科学》 CSCD 北大核心 2012年第1期83-93,共11页
对北大西洋东北爱尔兰西南陆架和斜坡PorcupineSeabight海区综合大洋钻探307航次1317E井灰泥杂基样品的生物硅和碳酸钙含量、1318B井全岩样品的生物硅含量进行了测量,在减除珊瑚文石质骨屑、同生白云石、岩屑高镁方解石基础上估算了第... 对北大西洋东北爱尔兰西南陆架和斜坡PorcupineSeabight海区综合大洋钻探307航次1317E井灰泥杂基样品的生物硅和碳酸钙含量、1318B井全岩样品的生物硅含量进行了测量,在减除珊瑚文石质骨屑、同生白云石、岩屑高镁方解石基础上估算了第四纪原始生产力.结果显示,原始生产力与世界其他地区同期相比均较高(一般10~30gcm-2ky-1),存在明显的旋回性变化,与δ13C值变化呈镜像负相关.进一步研究表明,较高的原始生产力可能与温暖的北大西洋东北中心流(ENAW)和陆棚边界流(SEC)有关,其与δ13C值镜像相关则可能受控于北大西洋深部冷水团和/或地中海暖水团侵入,而生产力快速增加-减少旋回周期可能与米兰科维奇的斜率轨道应力有联系.分析还发现,冷水碳酸盐泥丘的发育与表层海水原始生产力具有正相关性,暗示高的原始生产力会促进冷水碳酸盐泥丘的生长,但不一定是碳酸盐泥丘形成的必要条件.进而提出,研究区碳酸盐泥丘中的远洋灰泥杂基记录了北大西洋东北表层海水生产力变化信息. 展开更多
关键词 原始生产力 生物硅 碳酸钙 第四纪 IODP 307 porcupine Seabight 北大西洋
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Field evaluation of some bait additives against Indian crested porcupine(Hystrix indica)(Rodentia:Hystricidae) 被引量:1
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作者 Muhammad MUSHTAQ Iftikhar HUSSAIN +3 位作者 Afsar MIAN Shahid MUNIR Irfan AHMED Abdul Aziz KHAN 《Integrative Zoology》 SCIE CSCD 2013年第3期285-292,共8页
This research study evaluated the effect of different additives on the bait consumption by Indian crested porcupine,a serious forest and agricultural pest,under field conditions.Different additives(saccharin,common sa... This research study evaluated the effect of different additives on the bait consumption by Indian crested porcupine,a serious forest and agricultural pest,under field conditions.Different additives(saccharin,common salt,bone meal,fish meal,peanut butter,egg yolk,egg shell powder,yeast powder,mineral oil and coconut oil)at 2 and 5%each were tested for their relative preference,using groundnut-maize(1:1)as basic bait.All the additives were tested under a no-choice test pattern.For control tests,no additive was mixed with the basic bait.Saccharin at 5%concentration significantly enhanced the consumption of bait over the basic bait,while 2%saccharin supplemented bait resulted in a non-significant bait consumption.All other additives did not enhance the consumption of the bait material;rather,these worked as repellents.However,the repellency was lowest with the common salt,followed by egg yolk,egg shell powder,bone meal,peanut butter,mineral oil,fish meal and yeast powder,while coconut remained the most repellent compound.The present study suggested that groundnut-maize(1:1)supplemented with 5%saccharin was the preferred bait combination,and can be used with different rodenticides for the management of Indian crested porcupine. 展开更多
关键词 additives BAITS evaluation Hystrix indica Indian crested porcupine
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Quaternary primary productivity in Porcupine Seabight,NE North Atlantic
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作者 LI XiangHui Akihiro KANO +4 位作者 CHEN YunHua Chiduru TAKASHIMA XU WenLi XU BaoLiang WANG RuiJian 《Science China Earth Sciences》 SCIE EI CAS 2012年第2期306-314,共9页
Biogenic opal and calcium carbonate contents in the Quaternary fine-grained sediments in the deep sea coral mound area (Hole U1317E and Hole U1318B drilled by IODP Expedition 307) in Porcupine Seabight, southwest off ... Biogenic opal and calcium carbonate contents in the Quaternary fine-grained sediments in the deep sea coral mound area (Hole U1317E and Hole U1318B drilled by IODP Expedition 307) in Porcupine Seabight, southwest off Ireland, were measured to estimate the primary productivity (Pp) of the surface seawater in NE Atlantic. The results from the two holes commonly show relatively high Pp values of 10-30 g cm-2 ky-1, having stratigraphic cyclicity reversely correlated with the δ13C profile. The high Pp could be attributed to the oceanic setting controlled by the Eastern North Atlantic (Central) Water and Shelf Edge Current, which have been strongly influenced by the obliquity forcing of the Milankovitch cycle. A positive covariance was observed between high Pp and the mound development in U1317E, implying that the organic matter was the principal food source for the mound coral community. It is proposed that the pelagic marl matrix of the mound sediments provides information of the surface water productivity that is useful for reconstructing the paleoceanography and the paleoclimate in the NW Atlantic. 展开更多
关键词 primary productivity biogenic opal calcium carbonate QUATERNARY IODP 307 porcupine Seabight North Atlantic
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LGK974的合成工艺研究
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作者 骆荣双 黄朋越 +3 位作者 刘春江 赵庆平 周志旭 黄筑艳 《合成化学》 CAS 北大核心 2020年第5期446-450,共5页
LGK974是一种高度特异性和有效的Porcupine抑制剂。设计了一条新的合成路线,以2-氨基-5-溴吡啶、2-氯-3-甲基吡啶、2-氨基吡嗪和2-甲基-6-氯吡啶为起始原料,采用汇聚法,经取代、Suzuki、酰胺化等10步反应合成了LGK974,总收率11.5%,其结... LGK974是一种高度特异性和有效的Porcupine抑制剂。设计了一条新的合成路线,以2-氨基-5-溴吡啶、2-氯-3-甲基吡啶、2-氨基吡嗪和2-甲基-6-氯吡啶为起始原料,采用汇聚法,经取代、Suzuki、酰胺化等10步反应合成了LGK974,总收率11.5%,其结构经^1H NMR、^13C NMR和MS(ESI-TOF)确证。 展开更多
关键词 LGK974 porcupine抑制剂 合成 工艺优化 SUZUKI反应 酰胺化
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O-长链脂肪酸修饰在Wnt功能调控中的作用
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作者 韩笑 杨飞 刘华东 《生命科学》 CSCD 北大核心 2020年第12期1304-1314,共11页
脂酰化是重要的蛋白质翻译后修饰之一。Wnt蛋白是重要的O-脂酰化修饰底物,几乎涉及胚胎发育的各个方面,并控制许多成年组织的自我更新。O-脂酰化修饰影响Wnt的成熟、分泌和活性,该修饰相关基因的突变可导致多种疾病的发生。该文将围绕着... 脂酰化是重要的蛋白质翻译后修饰之一。Wnt蛋白是重要的O-脂酰化修饰底物,几乎涉及胚胎发育的各个方面,并控制许多成年组织的自我更新。O-脂酰化修饰影响Wnt的成熟、分泌和活性,该修饰相关基因的突变可导致多种疾病的发生。该文将围绕着Wnt的O-脂酰化,系统地阐述该类修饰的动态调节、对蛋白质功能的影响及其与疾病之间的关系。 展开更多
关键词 WNT O-脂酰化 翻译后修饰 PORCN(porcupine) 信号转导
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The first report of new species:Trichuris landak n. sp
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作者 Endang Purwaningsih 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2013年第2期85-88,共4页
Objective:To study nematode parasites morphology of Hystrix javanica(H.javanica),both through the feces and internal organs.Methods:Feces were observed by direct smear method,internal organs were observed after dissec... Objective:To study nematode parasites morphology of Hystrix javanica(H.javanica),both through the feces and internal organs.Methods:Feces were observed by direct smear method,internal organs were observed after dissecting the host.Specimens for light microscopy examination were fixed with 70%warm alcohol,cleared and mounted in lactophenol for wet mounting.Specimens for SEM examination were postfixed in cacodylate buffer and glutaraldehyde,dehydrated through a graded series of alcohol and freeze dried.The specimens were attached to stubs with double cello-tape,coated with gold and observed with a JSM5310LV electron microscope.Figures were made with the aid of a drawiug tube attached to Olympus compound microscope,other figures were photographs of scanning electron microscope images.Measurements were given in micrometers as the mean followed by the range in parentheses,unless otherwise stated.Results:The nematode species found in the intestine of H.javanica are Gireterakis girardi and a new species,Trihuris landak.The new species differs with previously reported species from Hystrix because of having stylet and short cervical alae.The pattern of bacillary band is closed to Trichuris trichiurus,the species that infect human,but differs because the surface of its vulva is not covered with densely spine.Conclusions:The species of nematodes found on H.javanica were Gireterakis girardi and a new species Trichuris landak n.sp.Those two species are newly recorded in Indonesia. 展开更多
关键词 HYSTRIX Javan porcupine Gireterakis girardi TRICHURIS landak n.sp. Java Indonesia
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在肿瘤类器官中研究Wnt信号通路为靶点的肿瘤治疗新进展
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作者 李风伟 梁红 《湖南中医药大学学报》 CAS 2018年第A01期1136-1136,共1页
类器官是指源于人体的干细胞通过体外3D培养能以与体内相似的方式来增殖和分化,形成保留原器官组织结构和生物信息的“微组织”。利用肿瘤类器官可以来研究肿瘤的演变过程,评估抗肿瘤药物的效果,探究肿瘤的转移机制,而结直肠癌肿瘤类器... 类器官是指源于人体的干细胞通过体外3D培养能以与体内相似的方式来增殖和分化,形成保留原器官组织结构和生物信息的“微组织”。利用肿瘤类器官可以来研究肿瘤的演变过程,评估抗肿瘤药物的效果,探究肿瘤的转移机制,而结直肠癌肿瘤类器官也保留了很多肿瘤体内的组织信息和信号通路,成为研究Wnt/PORCN通路在肿瘤干细胞功能的重要工具,对结直肠癌的发生发展和临床药物机理研究有重要指导意义。 展开更多
关键词 肿瘤类器官 WNT信号通路 porcupine蛋白小分子抑制剂 治疗新进展
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关于肿瘤Wnt信号通路棕榈酰化的综述
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作者 姜风琳 丁明 《科技创新与应用》 2020年第13期17-19,共3页
Wnt信号通路是一条进化上保守的信号通路,可以调节胚胎形成和组织发育等一系列生命过程。WNT蛋白可通过棕榈酰化进行翻译后修饰,对调节WNT蛋白在细胞中的分泌、定位、生物活性和从产生细胞中扩散起着关键作用。Wnt信号调控失衡与人类癌... Wnt信号通路是一条进化上保守的信号通路,可以调节胚胎形成和组织发育等一系列生命过程。WNT蛋白可通过棕榈酰化进行翻译后修饰,对调节WNT蛋白在细胞中的分泌、定位、生物活性和从产生细胞中扩散起着关键作用。Wnt信号调控失衡与人类癌症的发生密切相关,但具体的机制仍不清楚。文章将从Wnt信号途径转导的分子机制、porcupine(Porcn)介导的WNT蛋白的棕榈酰化以及Wnt信号通路在肿瘤中的功能进行探讨。 展开更多
关键词 WNT信号通路 棕榈酰化 porcupine 肿瘤
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