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Inheritance of social dominance is associated with global sperm DNA methylation in inbred male mice

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Current Zoology 2023年第2期69卷 143-155页

作者： Guan-Mei Hou yao-hua zhang Jian-Xu zhang The State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100101China

Dominance relationships between males and their associated traits are usually heritable and have implications for sexual selection in *** particular,social dominance and its related male pheromones are heritable in inbred mice;thus,we wondered whether epigenetic changes due to altered levels of DNA methylation determine ***,we used C57BL/6 male mice to establish a social dominance-subordination relationship through chronic dyadic encounters,and this relationship and pheromone covariation occurred in their offspring,indicative of *** transcriptome sequencing and whole-genome DNA methylation profiling of the sperm of both generations,we found that differential methylation of many genes was induced by social dominance-subordination in sires and could be passed on to the *** methylated genes were mainly related to growth and development processes,neurodevelopment,and cellular *** expression of the genes with similar functions in whole-genome methylation/bisulfite sequencing was also differentiated by social dominance-subordination,as revealed by *** particular,the gene Dennd1a,which regulates neural signaling,was differentially methylated and expressed in the sperm and medial prefrontal cortex in paired males before and after dominance-subordination establishment,suggesting the potential epigenetic control and inheritance of social dominance-related *** suggest that social dominance might be passed on to male offspring through sperm DNA methylation and that the differences could potentially affect male competition in offspring by affecting the development of thenervous system.

关键词： aggression epigenetic inheritance pheromone social hierarchy WGBs

Species recognition and the divergences in the chemical and ultrasonic signals between two coexisting Rattus species

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Current Zoology 2024年第4期70卷 531-538页

作者： Wei-Chao Wang Zhi-Ming Li Yi Chen Jin-hua zhang Jian-Xu zhang yao-hua zhang The State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAs Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijingChina

The ability to recognize and differentiate between conspecifics and heterospecifics as well as their signals is critical for the coexistence of closely related *** the genus Rattus,species are morphologically similar and multiple species often ***,we investigated the interspecific recognition and signal differentiation of two sympatric rat species,the brown rat(Rattus norvegicus,RN)and the Asian house rat(Rattus tanezumi,RT).In a two-way choice test,both RN and RT females showed a preference for conspecific male rats to heterospecific *** females showed a significant preference for accessible urine of males of same species to those of other species,but not for the inaccessi-ble *** the other hand,there were significant differences in the structural characteristics of the ultrasonic vocalization emitted by males of these two rat *** dodecyl sulphate-polyacrylamide gel electrophoresis(SDS-PAGE)and isoelectric focusing electrophoresis unveiled that major urinary proteins(MUPs)in voided urine were more highly expressed in RN males versus RT *** interspecific dif-ferences of urinary volatile compounds were also *** conclusion,female rats had the ability to distinguish between males of either species.

关键词： Asian house rats brown rats closely related species pheromones ultrasonic vocalization.

Exaggerated male pheromones in rats may increase predation cost

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Current Zoology 2016年第5期62卷 431-437页

作者： yao-hua zhang Hong-Chun LIANG Hong-Ling Guo Jian-Xu zhang State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture Institute of Zoology Chinese Academy of Sciences Beijing 100101 China College of Horticulture and Landscape Tianjin Agricultura University Tianjin 300384 Chin CCollege of Life Sciences University of Chinese Academy of Sciences Beijing 100049 China

Male animals with more conspicuous visual and acoustic signals increase their mating success, but also increase the risk of being attacked by eavesdropping predators. In rodents, males with richer sex pheromones often have higher attractiveness to females, but whether or not the males are also at higher predation risk is poorly known. Here, we used 2 laboratory inbred strains of the rat Rattus norvegicus, Brown Norway （BN） and Lewis （LEW）, and wild-captured rats as odor donors to assess the relationship between the pheromone levels in male rats and attractiveness to domes- tic cats Felis catus. LEW rats had significantly higher levels of male pheromones （e.g., 4-heptanone, 2-heptanone, and 9-hydroxy-2-nonanone） than BN rats. Simultaneously, wild-captured male rats were selectively assigned to 2 groups （HIGH or LOW） based on pheromone content as determined by gas chromatography-mass spectrometry （GC-MS）. Binary choice tests were carried out during the night in the test room. We found that cats spent more time investigating male bedding and urine of LEW rats than the counterpart of BN rats. Likewise, cats also preferred bedding and urine odor of the HIGH wild rats compared with the counterparts of LOW wild rats. Adding synthetic ana- logs of the 3 pheromone ketones into the urine of either BN rats or LOW wild rats significantly increased their attractiveness to cats. Our data suggest that the rats with exaggerated male phero- mones more strongly attracted predators and thus as a consequence may suffer from elevated pre- dation risk.

关键词： olfactory preference pheromone predator risk sexual ornament.

Male pheromones and their reception by females are co-adapted to affect mating success in two subspecies of brown rats

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Current Zoology 2021年第4期67卷 371-382页

作者： yao-hua zhang Lei ZHAO Shi-Hui Fu Zhen-Shan Wang Jian-Xu zhang State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China College of Life Science Hebei UniversityHebei ProvinceBaoding 071002China

Pheromonal communication plays a key role in the sociosexual behavior of *** coadaptation between pheromones and chemosensory systems has been well illustrated in insects but poorly investigated in rodents and other *** aimed to investigate whether coadaptation between male pheromones and female reception might have occurred in brown rats Rattus *** recently reported that major urinary protein(MUP)pheromones are associated with male mating success in a brown rat subspecies,***(Rnh).Here,we discovered that MUPs were less polymorphic and occurred at much lower concentrations in males of a parapatric subspecies,***(Rnc),than in Rnh males,and found no association between pheromones and paternity ***,the observation of Rnc males that experienced chronic dyadic encounters and established dominance-submission relationships revealed that the dominant males achieved greater mating success than the subordinate males,but their MUP levels did not differ by social *** findings suggest that male mating success in Rnc rats is related to social rank rather than to pheromone levels and that low concentration of MUPs might not be a reliable signal for mate choice in Rnc rats,which is different from the findings obtained in Rnh *** addition,compared with Rnh females,Rnc females exhibited reduced expression of pheromone receptor genes,and a lower number of vomeronasal receptor neurons were activated by MUP pheromones,which imply that the female chemosensory reception of pheromones might be structurally and functionally coadapted with male pheromone signals in brown rats.

关键词： coevolution major urinary protein social rank subspecies divergence vomeronasal reception

Laser Surface Remelting of Medium Ni-Cr Infinite Chilling Cast Iron Roll

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材料热处理学报 2004年第05B期25卷 1009-1012页

作者： yaoJian-hua zhangQun-li XIESong-jing ZhefiangUniversityofTechnology HangzhouChina

Laser surface remelting of medium Ni-Cr infinite chilling cast iron was performed with a continuous wave COa laser beam with the power of 7 KW under the argon shielding. The microstructural analysis of the laser remelted layer by optical microscope shows that the laser remelted layer consists of three zones, which is the melting zone, the transition zone and the heat affected zone. The size of the dendrite of the melting zone is only in the 1/10 to 1/30 range of that of the substrate. The distribution of the hardness of the laser remelted layer was detected, and the carrying capacity of rolling steel was also field-tested. The results show that both the hardness of the remelted layer and the carrying capacity all increase, especially, the carrying capacity was 50% increased compared with the substrate.

关键词：激光重熔铸铁轧辊显微结构晶粒细化硬度承载能力 Ni-Cr激冷

Alien lesser bandicoot rats have established wild populations in China

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Current Zoology 2024年第5期70卷 678-681页

作者： Ming-Yu zhang Zhi-Ming Li Rui-Dong Cao Jin-hua zhang Qing Liu Xi-Chao Zhu Quan-Sheng Liu yao-hua zhang Jian-Xu zhang The State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China College of Resources and Environment Baoshan UniversityKey Laboratory of Insect Resources Conservation and Utilization in Western Yunnan ProvinceBaoshanYunnan 678000China National Animal Collection Resource Center Institute of ZoologyChinese Academy of SciencesBeijing 100101China Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhou 510075China

The invasive Muridae are arguably among the most destructive alien animal species on the planet,for example,leading to the extinction of native birds and reptiles,the spread of zoonotic diseases,the destruction of buildings,and the contamination of food(Doherty et al.2016;zhang et al.2022).The lesser bandicoot rat Bandicota bengalensis is a giant rat of the Muridae family,which is mainly distributed in South and Southeast Asia such as India and Myanmar and become one of major pest rodents(Singleton et al.2003;Rao et al.2019).In China,the lesser bandicoot rat has long been recorded only in 2 narrow border regions of southwest Xinjiang and southwest Tibet.

关键词： Bandicota bengalensis inaugural collection invasive adaptability

Characteristics of corneal aberration in patients with bilateral keratoconus and unilateral corneal Vogt’s striae

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International Journal of Ophthalmology(English edition) 2024年第12期17卷 2316-2320页

作者： Sheng-Sheng Wei Yong Li Zhi-Qing Wu Jian-Guo Liu Jing Du Jing Li yao-hua zhang Shaanxi Eye Hospital Xi’an People’s Hospital(Xi’an Fourth Hospital)Affiliated People’s Hospital of Northwest UniversityXi’an 710004Shaanxi ProvinceChina Department of Ophthalmology Hospital of Shaanxi Normal UniversityXi’an 710004Shaanxi ProvinceChina

AIM:To assess the corneal high-order aberration(HOA)and its correlation with corneal morphological parameters in patients with bilateral keratoconus(KCN)and unilateral Vogt’s ***:A total of 168 eyes of 84 patients with KCN,whose corneas had definite signs of unilateral Vogt’s striae,were *** HOA and morphological parameters were measured using Pentacam ***:The corneal morphological parameters between KCN eyes with and without Vogt’s striae were evidently different(P<0.001).The 3rd coma 90°,4th spherical aberration,5th coma 90°,root-mean-square(RMS)(total),and RMS(HOA)in the front,back surfaces and total cornea in KCN eyes with Vogt’s striae were significantly higher than those in KCN eyes without Vogt’s striae(P<0.001).In KCN eyes with Vogt’s striae,the 3rd coma 90°and 4th spherical aberration in the front surface and total cornea were negatively correlated with flat keratometry value(K1),steep keratometry value(K2),mean keratometry value(Km),maximum keratometry value(Kmax),anterior corneal elevation(ACE),and posterior corneal elevation(PCE;P<0.05).The 3rd coma 90°,4th spherical aberration in back surface and RMS(total),RMS(HOA)in the front,back surfaces,total cornea were positively correlated with K1,K2,Km,Kmax,ACE,and PCE(P<0.05).CONCLUSION:Corneal HOA especially vertical coma and spherical aberration may increase when Vogt’s striae appeared in KCN *** scale of increase is significantly related with changes in corneal shapes.

关键词： keratoconus cornea corneal aberration corneal morphological Vogt’s striae

碳纤维自焊接骨架结构的形成及其复合材料性能研究

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高分子学报 2015年第1期25卷 8-14页

作者：张耀华吴国章华东理工大学材料科学与工程学院上海市先进聚合物重点实验室上海200237

报道了一种将短切碳纤维(CF)自发焊接成三维网络结构的新方法.研究发现,尼龙6(PA6)与CF具有较强的相互作用,SEM照片及储能模量高温平台表明,添加少量PA6能够在PS基体中形成耐高温的CFPA6自焊接骨架结构,PA6用量越多,高温储能模量越高,... 详细信息

报道了一种将短切碳纤维(CF)自发焊接成三维网络结构的新方法.研究发现,尼龙6(PA6)与CF具有较强的相互作用,SEM照片及储能模量高温平台表明,添加少量PA6能够在PS基体中形成耐高温的CFPA6自焊接骨架结构,PA6用量越多,高温储能模量越高,自焊接骨架结构强度越大.研究证明,这种自焊接骨架结构能够大幅度提高PS/CF复合体系的热变形温度,碳纤维具有优异的导电导热性能,碳纤维骨架结构能够降低导电临界浓度,增强面内导热系数.进一步分析表明,PA6在碳纤维表面定向聚集是一个动力学过程,CF-PA6自焊接骨架强度与PA6黏附率NPA6呈线性关系;扩大PA6与PS的黏度差,延长热压时间均有利于提高NPA6,进而大幅提高网络结构强度.

关键词：复合材料碳纤维自焊接骨架结构导电导热

Caveolin-1 is important for nitric oxide-mediated angiogenesis in fibrin gels with human umbilical vein endothelial cells

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Acta Pharmacologica Sinica 2006年第12期27卷 1567-1574页

作者： Yi-ming PAN Yong-zhong yao zhang-hua ZHU Xi-tai SUN Yu-dong QIU Yi-tao DING~2 Department of Hepatobiliary Surgery,Drum Tower Hospital,Medical College of Nanjing University and Hepatobiliary Institute of Nanjing University,Nanjing 210008,China Department of Hepatobiliary Surgery Drum Tower Hospital Medical College of Nanjing University and Hepatobiliary Institute of Nanjing University Nanjing China

Aim:The role of caveolin-1(Cav-1)in angiogenesis remains poorly *** endothelial nitric oxide(NO)synthase(eNOS),a caveolin-interacting protein,was demonstrated to play a predominant role in vascular endothelial growth fac-tor(VEGF)-induced *** purpose of our study was to examine therole of Cav-1 and the eNOS complex in NO-mediated ***:Human umbilical vein endothelial cells(HUVEC)were isolated and cultured in 3-Dfibrin gels to form capillary-like tubules by VEGF *** expression ofCav-1 and eNOS was detected by semiquantitative *** HUVEC weretreated with antisense oligonucleotides to downregulate Cav-1 *** and non-infected HUVEC were cultured in fibrin gels in the presenceor absence of VEGF(20 ng/mL)and N~G-nitro-L-arginine methyl ester(L-NAME;5 mmol/L).NO was measured using a NO assay kit and capillary-like tubules werequantified by tubule formation index using the Image J ***:RT-PCRanalysis revealed that Cav-1 levels steadily increased in a time-dependent mannerand reached their maximum after 5d of incubation,but there were no obviouschanges in eNOS mRNA expression in response to VEGF in the fibrin gel ***(20 ng/mL)can promote NO production and the formation of capillary-liketubules,and this promoting effect of VEGF was blocked by the addition ofL-NAME(5 mmol/L).When transduced HUVEC with the antisense Cav-1 oligo-nucleotides were plated in the fibrin gels,the capillary-like tubules were signifi-cantly fewer than those of the non-infected *** capillary-like tubules forma-tion and NO production of transduced HUVEC with the antisense Car-1 oligo-nucleotides cultured in fibrin gels showed no responses to the addition of VEGF(20 ng/mL)and L-NAME(5.0 mmol/L).Conclusion:NO was a critical angiogenicmediator in this ***-1 was essential for NO-mediated angiogenesis andmay be an important target of anti-angiogenesis therapy.

关键词： caveolin-1 angiogenesis nitric oxide vascular endothelial growth factor