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Dynamically changing antineutrophil cytoplasmic antibodies in granulomatosis with polyangiitis:A case report
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作者 Yan Zhang Qiao-Ding Dai +3 位作者 Ji-An Wang Li-Ping Xu Qiang Chen Yang-Zi Jin 《World Journal of Clinical Cases》 SCIE 2024年第16期2881-2886,共6页
BACKGROUND Granulomatosis with polyangiitis(GPA)is one of the most prevalent forms of the antineutrophil cytoplasmic antibody(ANCA)-associated vasculitis.GPA is characterized histologically by necrotizing granulomatou... BACKGROUND Granulomatosis with polyangiitis(GPA)is one of the most prevalent forms of the antineutrophil cytoplasmic antibody(ANCA)-associated vasculitis.GPA is characterized histologically by necrotizing granulomatous inflammation in addition to vasculitis.The diagnosis of GPA depends on clinical presentation,serological evidence of a positive ANCA,and/or histological evidence of necrotizing vasculitis or granulomatous destructive parenchymal inflammation.Cytoplasmic ANCA(c-ANCA)is positive in 65%-75% of GPA patients,accompanied by proteinase 3(PR3),the main target antigen of c-ANCA,another 5% of GPA patients had negative ANCA.CASE SUMMARY The patient,a 52-year-old male,presented with unexplained nasal congestion,tinnitus,and hearing loss.After a duration of 4 months experiencing these symptoms,the patient subsequently developed fever and headache.The imaging examination revealed the presence of bilateral auricular mastoiditis and partial paranasal sinusitis,and the ANCA results were negative.The anti-infective therapy proved to be ineffective,but the patient's symptoms and fever were quickly relieved after 1 wk of treatment with methylprednisolone 40 mg once a day.However,after continuous use of methylprednisolone tablets for 3 months,the patient experienced a recurrence of fever accompanied by right-sided migraine,positive c-ANCA and PR3,and increased total protein in cerebrospinal fluid.The and cyclophosphamide 0.8 g monthly,the patient experienced alleviation of fever and headache.Additionally,the ANCA levels became negative and there has been no recurrence.CONCLUSION For GPA patients with negative ANCA,there is a potential for early missed diagnosis.The integration of histopathological results and multidisciplinary communication plays a crucial role in facilitating ANCA-negative GPA. 展开更多
关键词 Anti-neutrophil cytoplasmic antibodies Granulomatosis with polyangiitis Antineutrophil cytoplasmic antibodyassociated vasculitis Immunosuppressive therapy Case report
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Morphological and cytological assessments reveal pollen degradation causes pollen abortion in cotton cytoplasmic male sterility lines
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作者 PEI Qingyu LIU Jinshan +10 位作者 GUO Chunping MA Xiaomei LIU Xiaoyan YOU Chunyuan LIN Hairong LI Zhibo ZHAO Ruihai ZHU Bo WU Yuanlong PAN Zhenyuan NIE Xinhui 《Journal of Cotton Research》 CAS 2024年第3期266-276,共11页
Background Understanding the mechanism of male sterility is crucial for producing hybrid seeds and developing sterile germplasm resources.However,only a few cytoplasmic male sterility(CMS)lines of cotton have been pro... Background Understanding the mechanism of male sterility is crucial for producing hybrid seeds and developing sterile germplasm resources.However,only a few cytoplasmic male sterility(CMS)lines of cotton have been produced due to several challenges,like inadequate variation of agronomic traits,incomplete sterility,weak resilience of restorer lines,and difficulty in combining strong dominance.Therefore,the morphological and cytological identification of CMS in cotton will facilitate hybrid breeding.Results Two F_(2) segregating populations of cotton were constructed from cytoplasmic male sterile lines(HaA and 01A,maternal)and restorer lines(HaR and 26R,paternal).Genetic analysis of these populations revealed a segregation ratio of 3:1 for fertile to sterile plants.Phenotypic analysis indicated no significant differences in traits of flower bud development between sterile and fertile plants.However,sterile plants exhibited smaller floral organs,shortened filament lengths,and anther atrophy on the flowering day in comparison with the fertile plants.When performed scanning electron microscopy(SEM),the two F_(2) populations revealed morphological variations in the anther epidermis.Cellular analysis showed no significant differences in pollen development before pollen maturation.Interestingly,between the pollen maturation and flowering stages,the tapetum layer of sterile plants degenerated prematurely,resulting in abnormal pollen grains and gradual pollen degradation.Conclusion The results of this study suggest that fertility-restoring genes are controlled by a single dominant gene.Sterile plants exhibit distinctive floral morphology,which is characterized by stamen atrophy and abnormal anthers.Pollen abortion occurs between pollen maturity and flowering,indicating that premature tapetum degradation may be the primary cause of pollen abortion.Overall,our study provides a theoretical basis for utilizing CMS in hybrid breeding and in-depth investigation of the dominant configuration of cotton hybrid combinations,mechanisms of sterility,and the role of sterile and restorer genes. 展开更多
关键词 COTTON cytoplasmic male sterility Genetic analysis Morphological characteristics Pollen development
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Synergy in Rice Immunity:Exploring Strategies of Coordinated Disease Defense Through Receptor-Like Kinases and Receptor-Like Cytoplasmic Kinases
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作者 PEI Mengtian CAO Yingying +6 位作者 XIE Xuze CAO Ying CHEN Jia ZHANG Xi WANG Zonghua LU Guodong ZHANG Shenghang 《Rice science》 SCIE CSCD 2024年第6期643-658,共16页
Receptor-like kinases(RLKs)and receptor-like cytoplasmic kinases(RLCKs)play an indispensable role in the perception and transmission of extracellular signals in plants.In rice,these kinases actively participate in imm... Receptor-like kinases(RLKs)and receptor-like cytoplasmic kinases(RLCKs)play an indispensable role in the perception and transmission of extracellular signals in plants.In rice,these kinases actively participate in immune responses against a variety of pathogens,including fungi,bacteria,and viruses.However,research on the specific response mechanisms and the spectrum of different kinase activities against various pathogens remains insufficient.This review provides an in-depth and comprehensive overview of the types and functions of RLKs and RLCKs involved in disease resistance,emphasizing the central role of certain RLKs and RLCKs in the plant immune system.These kinases can recognize specific molecular patterns of pathogens and rapidly initiate an immune response in rice.Furthermore,the activity and functional regulation of these key kinases are tightly controlled by various post-translational modifications,such as phosphorylation and ubiquitination.This meticulous regulation ensures that the rice immune system's response is both precise and timely,effectively balancing the intensity of the immune response and preventing potential issues caused by either hyperactivity or insufficiency.By synthesizing current research findings,this review not only broadens our understanding of the role of RLKs and RLCKs in plant immunity but also provides new perspectives and strategies for future research on disease resistance breeding in rice.Future studies are expected to delve deeper into the signaling networks and regulatory mechanisms of these kinases,exploring their potential in agricultural production to develop rice varieties with enhanced disease resistance. 展开更多
关键词 receptor-like kinase receptor-like cytoplasmic kinase pathogen-associated molecular pattern genetic breeding
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Potential regulatory mechanism and clinical significance of synaptotagmin binding cytoplasmic RNA interacting protein in colorectal cancer
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作者 Hui Li He-Qing Huang +8 位作者 Zhi-Guang Huang Rong-Quan He Ye-Ying Fang Rui Song Jia-Yuan Luo Da-Tong Zeng Kai Qin Dan-Ming Wei Gang Chen 《World Journal of Clinical Oncology》 2024年第11期1412-1427,共16页
BACKGROUND Colorectal cancer(CRC)causes many deaths worldwide.Synaptotagmin binding cytoplasmic RNA interacting protein(SYNCRIP)is an RNA-binding protein that plays an important role in multiple cancers by epigenetica... BACKGROUND Colorectal cancer(CRC)causes many deaths worldwide.Synaptotagmin binding cytoplasmic RNA interacting protein(SYNCRIP)is an RNA-binding protein that plays an important role in multiple cancers by epigenetically targeting some genes.Our study will examine the expression,potential effect,biological function and clinical value of SYNCRIP in CRC.AIM To examine the expression,potential effect,biological function and clinical value METHODS The expression of SYNCRIP was examined by immunohistochemistry arrays and high-throughput data.The effect of SYNCRIP gene in CRC cell growth was evaluated by CRISPR-Cas9 technology.The target genes of SYNCRIP were calculated using various algorithms,and the molecular mechanism of SYNCRIP in CRC was explored by mutation analysis and pathway analysis.The clinical value of SYNCRIP in prognosis and radiotherapy was revealed via evidence-based medicine methods.RESULTS The protein and mRNA levels of SYNCRIP were both highly expressed in CRC samples compared to nontumorous tissue based on 330 immunohistochemistry arrays and 3640 CRC samples.Cells grew more slowly in eleven CRC cell lines after knocking out the SYNCRIP gene.SYNCRIP could epigenetically target genes to promote the occurrence and development of CRC by boosting the cell cycle and affecting the tumor microenvironment.In addition,CRC patients with high SYNCRIP expression are more sensitive to radiotherapy.CONCLUSION SYNCRIP is upregulated in CRC,and highly expressed SYNCRIP can accelerate CRC cell division by exerting its epigenetic regulatory effects.In addition,SYNCRIP is expected to become a potential biomarker to predict the effect of radiotherapy. 展开更多
关键词 Synaptotagmin binding cytoplasmic RNA interacting protein Colorectal cancer Radiotherapy Cell mitosis Immune microenvironment
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Animal models for anti-neutrophil cytoplasmic antibody-associated vasculitis:Are current models good enough?
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作者 Fei Huang Yongman Lv +2 位作者 Siyang Liu Hao Wu Qingquan Liu 《Animal Models and Experimental Medicine》 CAS CSCD 2023年第5期452-463,共12页
Antineutrophil cytoplasmic autoantibody(ANCA)-associated vasculitis(AAV)is a rare and severe systemic autoimmune disease characterized by pauci-immune necrotizing inflammation of small blood vessels.AAV involves multi... Antineutrophil cytoplasmic autoantibody(ANCA)-associated vasculitis(AAV)is a rare and severe systemic autoimmune disease characterized by pauci-immune necrotizing inflammation of small blood vessels.AAV involves multiple organ systems throughout the body.Our knowledge of the pathogenesis of AAV has increased considerably in recent years,involving cellular,molecular and genetic factors.Because of the controlled environment with no other confounding factors,animal models are beneficial for studying the mechanistic details of disease development and for providing novel therapeutic targets with fewer toxic side effects.However,the complexity and heterogeneity of AAV make it very difficult to establish a single animal model that can fully represent the entire clinical spectrum found in patients.The aim of this review is to overview the current status of animal models for AAV,outline the pros and cons of methods,and propose potential directions for future research. 展开更多
关键词 antineutrophil cytoplasmic antibody experimental models PATHOGENESIS VASCULITIS
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Comprehensive analysis of prognostic value and immunotherapy prospect of brain cytoplasmic RNA1 in hepatocellular carcinoma
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作者 Xiao-Yong Han Xiong Li +7 位作者 Rang-Yin Zhao Hai-Zhong Ma Miao Yu Xiang-Dong Niu Hao-Jie Jin Yong-Feng Wang De-Ming Liu Hui Cai 《World Journal of Gastrointestinal Oncology》 SCIE 2023年第4期644-664,共21页
BACKGROUND The expression of brain cytoplasmic RNA1(BCYRN1)is linked to the clinicopathology and prognosis of several types of cancers,among which hepatocellular carcinoma(HCC)is one of the most frequent types of canc... BACKGROUND The expression of brain cytoplasmic RNA1(BCYRN1)is linked to the clinicopathology and prognosis of several types of cancers,among which hepatocellular carcinoma(HCC)is one of the most frequent types of cancer worldwide.AIM To explore the prognostic value and immunotherapeutic potential of BCYRN1 in HCC by bioinformatics and meta-analysis.METHODS Information was obtained from the Cancer Genome Atlas database.First,the correlation between BCYRN1 expression and prognosis and clinicopathologic characteristics of HCC patients was explored.Univariate and multivariate regression analyses were employed to examine the relationship between BCYRN1 and HCC prognosis.Secondly,potential functions and pathways were explored by means of enrichment analysis of differentially-expressed genes.The relationships between BCYRN1 expression and tumor microenvironment,immune cell infiltration,immune checkpoint,drug sensitivity and immunotherapy effect were also investigated.Finally,three major databases were searched and used to conduct a meta-analysis on the relationship between BCYRN1 expression and patient prognosis.RESULTS BCYRN1 expression was significantly higher in HCC compared to normal tissues and was linked to a poor prognosis and clinicopathological characteristics.Enrichment analysis showed that BCYRN1 regulates the extracellular matrix and transmission of signaling molecules,participates in the metabolism of nutrients,such as proteins,and participates in tumor-related pathways.BCYRN1 expression was linked to the tumor microenvironment,immune cell infiltration,drug sensitivity and the efficacy of immunotherapy.Furthermore,the meta-analysis in this study showed that BCYRN1 overexpression was related to a worse outcome in HCC patients.CONCLUSION Overexpression of BCYRN1 relates to poor prognosis and may be a potential prognostic factor and immunotherapeutic target in HCC. 展开更多
关键词 Brain cytoplasmic RNA1 IMMUNOTHERAPY PROGNOSTIC Biomarker Hepatocellular carcinoma
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Myeloperoxidase-antineutrophil cytoplasmic antibody-associated vasculitis with headache and kidney involvement at presentation and with arthralgia at relapse:A case report
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作者 Xue Zhang Guang-Ben Zhao +3 位作者 Long-Kai Li Wei-Dong Wang Hong-Li Lin Ning Yang 《World Journal of Clinical Cases》 SCIE 2023年第21期5167-5172,共6页
BACKGROUND Patients with proteinase 3-antineutrophil cytoplasmic antibody associated vasculitis(AAV)experience different manifestations at the initial onset and relapse.However,such cases of different initial and rela... BACKGROUND Patients with proteinase 3-antineutrophil cytoplasmic antibody associated vasculitis(AAV)experience different manifestations at the initial onset and relapse.However,such cases of different initial and relapse manifestations have not been reported in myeloperoxidase(MPO)-AAV patients.CASE SUMMARY A 52-year-old woman was admitted to our hospital because of headache.Laboratory findings indicated nephrotic range proteinuria and microscopic hematuria,serum creatinine of 243μmol/L,anti-MPO antibody titer of>400 RU/mL,and positive perinuclearantineutrophil cytoplasmic antibody.Renal biopsy showed pauci-immune crescentic glomerulonephritis.The cerebrospinal fluid examination and brain magnetic resonance imaging did not show any abnormality.Therefore,MPO-AAV was diagnosed.Corticosteroids,plasmapheresis,and cyclophosphamide as induction therapy and mycophenolate mofetil(MMF)as maintenance therapy were administered.The patient’s headache disappeared;serum creatinine returned to normal;complete remission of microscopic hematuria and proteinuria was observed.Anti-MPO antibody titer reached normal limits after immunosuppressive treatment.Twenty-five months after stopping the immunosuppressive treatment,the patient relapsed with arthralgia,without neurological or renal involvement.The patient’s arthralgia improved after treatment with prednisone and MMF.CONCLUSION We have reported a rare case of MPO-AAV who initially presented with headache and kidney involvement.However,relapse presented with only arthralgia,which was completely different from the initial manifestations.This case suggests that AAV relapse should be highly suspected in MPO-AAV patients after remission,when clinical manifestations at relapse are different from those at onset.Prednisone and MMF may provide a good choice for refractory arthralgia during relapse in MPO-AAV patients. 展开更多
关键词 Antineutrophil cytoplasmic antibody associated vasculitis HEADACHE KIDNEY ARTHRALGIA RELAPSE Case report
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Influential Factors of Restorer of New Cytoplasmic Male Sterile(NER) on Anther Culture 被引量:11
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作者 李浩杰 蒲晓斌 +2 位作者 张锦芳 张启行 蒋梁材 《Agricultural Science & Technology》 CAS 2008年第1期49-53,共5页
Some influential factors of anther culture were studied preliminarily by conducting anther culture of the restorers of new cytoplasmic male sterile (NER). Several results were obtain from this experiment and they we... Some influential factors of anther culture were studied preliminarily by conducting anther culture of the restorers of new cytoplasmic male sterile (NER). Several results were obtain from this experiment and they were listed as follow:① MS cultrure medium with such hormones as 2,4-D 2 mg/L,6-BA 0.5 mg/L, NAA 0.5 mg/L was the best suitable for callus induction of NER. ②The difference of induction rate was significantly different between different plant age groups. From the 110th day to 141th day,the induction rate was increased with the increase of age and the difference of induction rate reached 0.01 significant difference level. The induction rate reached the highest value in the 141th day then it declined gradually. ③The combined use of 2, 4-D and 6-BA with proper increase of 2,4-D was good for inducing callus. ④The green plantlet induction rate of NER was increased when the concentration of 6-BA increased from 2 mg/L to 4 mg/L. Adding ZT from 0.5 mg/L to 2 mg/L. 6-BA would led 2.47% increase of green plantlet olantlet induction rate. 展开更多
关键词 Brassica napus L New cytoplasmic male sterile(NEA) Restorer of new cytoplasmic male sterile(NER) Anther culture
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RAPD and ISSR Markers of Fertility Restoring Gene for Aegilops kotschyi Cytoplasmic Male Sterility in Wheat 被引量:10
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作者 刘保申 孙其信 +6 位作者 孙兰珍 高庆荣 解超杰 窦秉德 倪中福 魏艳玲 张延传 《Acta Botanica Sinica》 CSCD 2002年第4期446-450,共5页
LK783 was found to be a good fertility restorer for K-type male sterility of wheat (Triticum aestivum L.). RAPD and ISSR (inter-simple sequence repeat polymorphism) markers were employed to map the major restoring gen... LK783 was found to be a good fertility restorer for K-type male sterility of wheat (Triticum aestivum L.). RAPD and ISSR (inter-simple sequence repeat polymorphism) markers were employed to map the major restoring gene in LK783. Maintainer and restorer DNA pools were established using the extreme sterile and fertile plants among KJ5418A//911289/LK783 F 1 population, respectively. Four hundred and eighteen RAPD primers and 33 ISSR primers were used for screening polymorphisms between the two pools, and amplification bands using a RAPD primer of OPK18 and an ISSR primer of UBC-845 were found polymorphic between the two pools. Linkage analysis showed that OPK18 450 and UBC-845 800 were linked to the restoring gene in LK783. The distance between the restoring gene and OPK18 450 was (15.07±6.28) cM (centiMorgan), with the distance between the restoring gene and UBC-845 800 being (8.20±4.85) cM. The marker of UBC-845 800 was located on chromosome 1BS by amplifying nulli-tetrasomics and 1B ditelosomics of Chinese Spring with the primer of UBC-845, indicating that the restoring gene in LK783 was located on 1BS. The breeding for new fertility restorer lines of K-type cytoplasmic male sterility of wheat would be facilitated by using the two markers. 展开更多
关键词 WHEAT cytoplasmic male sterility restoring gene inter-simple sequence repeat polymorphism RAPD
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AFLP Analysis of Cytoplasmic Male-sterile Line and Its Maintainer Line of Pepper 被引量:6
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作者 罗向东 戴亮芳 +1 位作者 陈劲枫 王述彬 《Agricultural Science & Technology》 CAS 2010年第2期69-71,共3页
[Objective] The aim of this study was to analyze the cytoplasmic male sterile line 21A and its maintainer line 21B of peppers by AFLP,and lay the foundation for further studies on molecular mechanism of the cytoplasmi... [Objective] The aim of this study was to analyze the cytoplasmic male sterile line 21A and its maintainer line 21B of peppers by AFLP,and lay the foundation for further studies on molecular mechanism of the cytoplasmic male sterility in peppers.[Method] Cytoplasmic male sterility(CMS)line 21A and its maintainer line 21B were analyzed by AFLP to obtain the specific amplified fragments of cytoplasmic male sterile line 21A,while the specific amplified fragments were recovered or sequenced,and analyzed by BLAST... 展开更多
关键词 PEPPER cytoplasmic male-steriltiy(CMS) AFLP analysis
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Microtubule Structure and Male Sterility in a Gene-Cytoplasmic Male Sterile Line of Rice, Zhen Shan 97A 被引量:4
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作者 叶秀麟 杨子德 +1 位作者 徐是雄 梁承邺 《Acta Botanica Sinica》 CSCD 2003年第2期183-192,共10页
Histological changes that occur during microsporogenesis are documented in a gene-cytoplasmic male sterile rice ( Oryza saliva L.) line, Zhen Shan 97A, its maintainer line, Zhen Shan 97B, and the restorer line, Ce64 o... Histological changes that occur during microsporogenesis are documented in a gene-cytoplasmic male sterile rice ( Oryza saliva L.) line, Zhen Shan 97A, its maintainer line, Zhen Shan 97B, and the restorer line, Ce64 of a Mine hybrid rice production system. In the restorer line, Ce64, the developing microsporocytes have dense cytoplasm and a distinct set of circumferential microtubules around the nucleus. Successive cytokinesis results in the formation of tetrads. The microtubules within the cells of tetrads and microspores radiate from the surface of the nucleus towards the outer edge of the cytoplasm. Subsequent pollen development is normal. During the course of microspore formation tubulin speckles can be found in the cytoplasm. The general pattern of development and microtubule organization in the maintainer lined Zhen Shan 97B, is similar to Ce64, except that a few more tubulin speckles appear during microspore formation. In the case of the mate sterile line, Zhen Shan 97A, a number of abnormalities can be discerned during early microsporogenesis. These include vacuoles forming within the developing microsporocyte and faintly stained microtubules with no defined distribution pattern. Prominent tubulin speckles are common within the cytoplasm. For those microsporocytes that undergo meiosis, no defined organizational patterns of microtubules can be found within the tetrad. All microspores abort soon after. Abnormalities and defects in microtubule organization observed in Zhen Shan 97A showed that complex interactions between the cytoplasm and the nucleus began at very early stage of microsporocyte development. 展开更多
关键词 Oryza saliva cytoplasmic male sterility MICROTUBULES microsporocyte VACUOLE tubulin speckles
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Preliminary Studies on the Effect of Photoperiod and Temperature on Male Fertility of a Cytoplasmic Male Sterile Line in Wheat 被引量:2
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作者 王丰青 巍荷 +1 位作者 何觉民 何仪 《Agricultural Science & Technology》 CAS 2008年第2期85-89,共5页
[Objective] The study aimed to reveal the effect of photoperiod and temperature on male fertility of cytoplasmic male sterile line Vtai911289a in wheat and discuss the mechanism of male fertility alteration. [ Method ... [Objective] The study aimed to reveal the effect of photoperiod and temperature on male fertility of cytoplasmic male sterile line Vtai911289a in wheat and discuss the mechanism of male fertility alteration. [ Method ] The sowing-date tests and designed conditions were conducted during 2003 -2005. [ Result] Fertility of Vtai911289a, could alter under specific photoperiod and temperature conditions. Temperature is one of the main factors influencing male fertility of the male sterile lines. Vtai911289a, showed stable sterility under the condition of the mean of daily temperature at fertility sensitive stage lower than 19℃ and presented partial fertility when the mean of daily temperature at fertility sensitive stage lower than 20 - 22℃. Photoperiod to some extent affects the male fertility of Vtai911289a, long-day condition is helpful for the male fertility of the sterile line. [ Conclusion] The application of photoperiod temperature-sensitive cytoplasmic male sterile line in production has a higher safety than that of temperature sensitive sterile line. 展开更多
关键词 Temperature PHOTOPERIOD cytoplasmic male sterile line Male fertility
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Cytological Study on Zidao Type Cytoplasmic Male Sterile Line-Yingxiang A 被引量:2
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作者 魏磊 《Agricultural Science & Technology》 CAS 2015年第3期459-461,共3页
Anthers of male sterile line and its maintainer line of Zidao type rice, Yingxiang A and Yingxiang B were studied by cytological methods, such as F-KI staining, silver nitrate staining and paraffin sections, It is fou... Anthers of male sterile line and its maintainer line of Zidao type rice, Yingxiang A and Yingxiang B were studied by cytological methods, such as F-KI staining, silver nitrate staining and paraffin sections, It is found that in Yingxiang A, there are some abnormalities in meiosis, represented by unequal division at the meiotic phase; the abortion of CMS line arises at the meiotic phase and is almost completed at the phase of monomicrospore, but only a tiny amount of aborted mi- crospores are observed; the abortion is complete and thorough, and none normal functional pollens are found; the morphology of aborted pollens is similar to that of typically aborted pollens; the tapetal cells still exist in anthers from the microsporocyte stage to the tetrad stage, but they are abnormally hyperplastic. However, in Yingxiang B, there are no abnormalities in meiosis at the meiotic phase; the tapetal cells exist in anthers before the tetrad stage, but they disappear completely when the pollen are mature. It is indicated that the abortion of CMS Yingxiang line mainly occurs at the meiotic phase, and is basically completed at the phase of monomicrospore. The abortion is probably caused by the abnormally hyperplastic tapetal cells. The abnormalities in tapetal cells may affect the normal development of pollens, resulting in the emergence of abortion. In addition, the abortion in Yingxiang A is complete and thorough, which is of great significance in hybrid breeding. 展开更多
关键词 cytoplasmic male sterility Cytological Study TAPETUM
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Improvement of in vitro Cytoplasmic Maturation of Denuded Porcine Oocytes by Coculture with Follicular Mural Granulosa Cells
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作者 郇延军 解炳腾 +2 位作者 朱江 孔庆然 刘忠华 《Agricultural Science & Technology》 CAS 2012年第6期1368-1372,共5页
[Objective] This study aimed to improve the in vitro maturation quality of denuded porcine oocytes and provide scientific basis for establishing a stable and efficient denuded oocyte culture system. [Method] The first... [Objective] This study aimed to improve the in vitro maturation quality of denuded porcine oocytes and provide scientific basis for establishing a stable and efficient denuded oocyte culture system. [Method] The first polar body extrusion rate, oocyte glutathione (GSH) content, positive rate of brilliant cresyl blue (BCB) staining and development potential of activated oocytes or fertilized oocytes were employed as main indicators to investigate the effects of follicular mural granulosa cell (MGC) coculture on cytoplasmic maturation of cumulus cell-removal oocytes (Denuded Oocyte, DO). [Result] According to in vitro maturation results, compared with DO group, the first polar body extrusion rate of porcine oocytes in DO+MGC group was not significantly different, but the nuclear maturation process was improved and was more similar to that in COC (cumulus-oocyte complex) group. Detection of GSH content in mature oocytes showed that there was no significant difference between DO+ MGC group (optical density of 1 053.67) and COC group (optical density of 1 426.00) or between DO+MGC group and COC+GC group (optical density of 1 541.00), however, GSH content in mature oocytes of DO group (optical density of 724.67) was significantly lower than that of COC group and COC+GC group (P0.05). Detection of glucose-6-phosphate dehydrogenase (G6PDH) activity showed that there was no significant difference in BCB positive oocyte rate between DO +MGC group (88.26% ) and COC group (92.75%) or between DO+MGC group and DO group (82.86% ), however, BCB positive oocyte rate of DO group was significantly lower than that of COC group (P0.05). Furthermore, the cleavage rate and blastocyst rate of activated mature oocytes derived from DO +MGC group (94.98% and 43.67% , respectively) were significantly higher than those from DO group (52.54% and 8.97%, respectively) (P0.05), and were not significantly different compared with those from COC group (97.11% and 38.30%, respectively). In addition, the cleavage rate of fertilized oocytes derived from DO+MGC group (72.65%) showed no significant difference compared with that from DO group (63.59%), but the blastocyst rate of DO+MGC group was significantly higher than that of DO group (9.88%) (P0.05). [Conclusion] MGC coculture can significantly improve the in vitro cytoplasmic maturation quality of denuded porcine oocytes, thereby enhancing the subsequent developmental potential. 展开更多
关键词 Denuded oocytes Mural granulosa cells in vitro maturation cytoplasmic maturation PORCINE
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Establishment on Isolated Microspore Culture Optimized System for Restorer of New Cytoplasmic Male Sterile (NER) of Brassica napus L.
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作者 李浩杰 蒲晓斌 +5 位作者 张锦芳 张德发 夏凊 石化娟 蒋俊 蒋梁材 《Agricultural Science & Technology》 CAS 2010年第1期182-185,共4页
[Objective]The aim was to establish optimized system for NER isolated microspore culture of Brassica napus L.. [Method]Twenty varieties of NER of Brassica napus were grown under uncontrolled temperature and light cond... [Objective]The aim was to establish optimized system for NER isolated microspore culture of Brassica napus L.. [Method]Twenty varieties of NER of Brassica napus were grown under uncontrolled temperature and light conditions,and their isolated microspore from anthers were used as explants in vitro culture. The influencing factors of microspore culture were preliminarily studied. [Result]The difference of genotypes was important influencing factors to embryoid yield. The embryoid yield increased by supplementing with 6-BA and NAA,culturing in solid-liquid double layer medium with activated charcoal; The difference was not significant of embryoid yield between culturing in medium supplemented with colchicines and the CK. The rates of cotyledonous embryoids directly developed into normal plantlets increased through enriching with 0.1-0.2 mg/L NAA and being treated on slim illumination two days before being inducted into normal plantlets. [Conclusion]The technical system of microspore culture of restorer of new cytoplasmic male sterile (NER) was established,which and lays a foundation for accelerating genotype purification of NER introgressive line. 展开更多
关键词 Brassica napus L. Restorer of new cytoplasmic male sterile (NER) Isolated microspore culture Technical system
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Cytological Mechanism of Cytoplasmic Inheritance in Pinus tabulaeformis: Ⅱ. Transmission of Male and Female Organelles During Fertilization and Proembryo Development
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作者 国凤利 胡适宜 +1 位作者 徐是雄 袁宗飞 《Acta Botanica Sinica》 CSCD 2000年第4期341-352,共12页
In an earlier report the ultrastructure and nucleoid organelles of male gamete in Pinus tabulaeformis Carr. have been described. Presently, the ultrastructure of the cytoplasm of the egg cell and pollen tube—imm... In an earlier report the ultrastructure and nucleoid organelles of male gamete in Pinus tabulaeformis Carr. have been described. Presently, the ultrastructure of the cytoplasm of the egg cell and pollen tube—immediately before fertilization and during cytoplasmic transmission of male gametophyte—has been described for the same species. The fate of parental plastids and mitochondria in the proembryo has also been followed. The mature egg cell contains a large amount of mitochondria, but seems to lack normal plastids. Most plastids have transformed into large inclusions. Apart from the large inclusions, there are abundant small inclusions and other organelles in the egg cell. During fertilization, pollen tube penetrates into the egg cell at the micropylar end and thereafter the contents are released. Plastid and mitochondrion of male origin are lacking near the fusing sperm_egg nuclei. The second sperm nucleus—not involved in karyogamy—remains at a site near the receptive vacuole. This nucleus is surrounded by large amount of male cytoplasm containing mixed organelles from the sperm cell, tube cell, and egg cell. At the free nuclear proembryo stage, organelles of male and female origin are visible in the perinucleus_cytoplasmic zone. Most of the mitochondria have the same morphological features as those in the egg cell. Some of the mitochondria appear to have originated from the sperm and tube cells. Plastids are most likely of male gametophyte origin because they have similar appearance as those of the sperm and tube cell. Large inclusions in the egg cell become vacuole_like. Paternal plastids have been incorporated into the neocytoplasm of the proembryo. In the cellular proembryo, maternal mitochondria are more abundant. Plastids resembling those of the sperm and tube cell are still present. These cytological results clearly show that in P. tabulaeformis, plastids are inherited paternally and mitochondria bipaternally. The cytological mechanism of plastid and mitochondrion inheritance in gymnosperm is discussed. 展开更多
关键词 GYMNOSPERMS cytoplasmic inheritance paternal plastid inheritance maternal mitochondrion inheritance ULTRASTRUCTURE Pinus tabulaeformis
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Cytological Mechanism of Cytoplasmic Inheritance in Pinus tabulaeformis: Ⅰ. Ultrastructural Aspects and Nucleoids of the Male Gametes
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作者 胡适宜 国凤利 +1 位作者 袁宗飞 徐是雄 《Acta Botanica Sinica》 CSCD 2000年第1期23-31,共9页
The cytological mechanism of plastid and mitochondrion inheritance in Pinus is an interesting research topic with only a limited number of published articles. The results indicate that the sperms of Pinus tabu... The cytological mechanism of plastid and mitochondrion inheritance in Pinus is an interesting research topic with only a limited number of published articles. The results indicate that the sperms of Pinus tabulaeformis Carr. contain abundant plastids, mitochondria and organelle DNA. These data provide reliable cytological evidence of paternal plastid and mitochondrion inheritance in Pinus . The results are in line with the confirmed general rule of paternal plastid inheritance in Pinaceae. But whether mitochondria in sperm cells can be transmitted into the embryos is an issue needs further developmental studies. Another important finding is that contrary to earlier classification of the male gamete of Pinaceae into the male nuclei type, the results reveal that male gametes in Pinus tabulaeformis are actually cells. However, the sperm cells are only surrounded by plasma membranes without cell walls. The larger leading sperm cell in a pollen tube section is long in shape, with a large amount of cytoplasm; while the second sperm cell is smaller, round in shape and contains less cytoplasm. Whether this feature of the male gamete type could be considered as a representative characteristic of the family is discussed and further conclusions await more experimental evidences from studies on plants from different species. 展开更多
关键词 GYMNOSPERM cytoplasmic inheritance paternal plastid inheritance maternal mitochondrion inheritance gymnosperm sperm cell Pinus tabulaeformis
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Mapping of Fertility Restoring Gene for Aegilops kotschyi Cytoplasmic Male Sterility in Wheat Using SSR Markers 被引量:13
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作者 LIU Bao-shen, SUN Qi-xin, GAO Qing-rong, SUN Lan-zhen, XIE Chao-jie, LI Chuan-you, NI Zhong-fu and DOU Bing-de( Agronomy Department, Shandong Agricultural University, Taian 271018, P.R.China Department of Plant Genetics and Breeding, China Agricultural University, Beijing 100094 , P. R . China ) 《Agricultural Sciences in China》 CAS CSCD 2002年第8期845-849,共5页
LK783 was found to be a good fertility restorer for K-type male sterility of wheat. Microsatel-lite markers were employed to map the major restoring gene in LK783. Maintainer and restorer DNA pools were established us... LK783 was found to be a good fertility restorer for K-type male sterility of wheat. Microsatel-lite markers were employed to map the major restoring gene in LK783. Maintainer and restorer DNA pools were established using the extreme sterile and fertile plants among (KJ5418A//911289/LK783)F1 population, respectively. Seventy-nine sets of SSR primers were screened for polymorphism between the two pools, 6 of which were found polymorphic. Linkage analysis showed that Xgwm11, Xgwm18, Xgwm264a and Xgwm273 were linked to the restoring gene in LK783, while Xgwm11, Xgwm18 and Xgwm273 were co-segregated. The distance between the Rf gene in LK783 and the three co-segregated markers was 6.54 ± 4.37 cM, the distance between Rf gene and Xgwm264a was 5. 71 ± 4.10 cM. The four SSR markers were located on chromosome IBS by amplifying the DNA of nulli-tetrasomics and ditelosomics of CS with the 4 sets of primers, indicating that the major restoring gene in LK783 was located on IBS, but the relative location of the gene was different from Rfv1, allelism of the two genes should be further investigated. The breeding for new fertility restorer lines of K-type cytoplasmic male sterility in wheat would be facilitated by using the four polymorphic markers. 展开更多
关键词 Wheat ( Triticum aestivum) cytoplasmic male sterility Restoring gene Molecular marker MICROSATELLITE
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The cytoplasmic droplet may be indicative of sperm motility and normal spermiogenesis 被引量:6
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作者 Hui Xu Shui-Qiao Yuan +1 位作者 Zhi-Hong Zheng Wei Yam 《Asian Journal of Andrology》 SCIE CAS CSCD 2013年第6期799-805,I0009,共8页
Although the cytoplasm of spermatids is removed at the end of spermiogenesis, a tiny portion is usually retained in the sperm flagellum, which is termed the cytoplasmic droplet (CD) in mammals. CDs are believed to p... Although the cytoplasm of spermatids is removed at the end of spermiogenesis, a tiny portion is usually retained in the sperm flagellum, which is termed the cytoplasmic droplet (CD) in mammals. CDs are believed to play a role in sperm volume adaptation. However, we have noticed that epididymal spermatozoa that display initial (flagellation in situ) and progressive motility mostly possess CDs, whereas spermatozoa without CDs are rarely motile, suggesting that CDs have a role in motility development during sperm epididymal maturation. In the present study, we analyzed the relationship between the presence or absence of CDs, motility development and positional changes of CDs during sperm epididymal maturation in mice and monkeys. We also examined CDs on spermatozoa of three knockout mouse lines with late spermiogenic defects. Our data suggest that the CD is a normal organelle transiently present exclusively on epididymal spermatozoa, and normal CD morphology and location are associated with normal motility development during epididymal maturation of spermatozoa. Abnormal CD formation, e.g., a complete lack of CDs or ectopic CDs, is indicative of defective spermiogenesis. If CDs are essential for sperm motility development, then CDs may represent an ideal drug target for the development of non-hormonal male contraceptives. 展开更多
关键词 cytoplasmic droplets EPIDIDYMIS FERTILITY mouse semen analysis SPERMIOGENESIS sperm motility
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Application of hybrids with cytoplasmic male-sterility in Zea mays L.in China 被引量:3
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作者 魏建昆 刘克明 崔洋 《华北农学报》 CSCD 北大核心 1993年第S2期1-9,共9页
The abortive behaviour and the cytoplasm quality of cytoplasmic male-sterility(CMS)lines of homocaryon were investigated and the existence of C race of Bipolaris maydiswere discussed from the point of view of genetic ... The abortive behaviour and the cytoplasm quality of cytoplasmic male-sterility(CMS)lines of homocaryon were investigated and the existence of C race of Bipolaris maydiswere discussed from the point of view of genetic breeding,physiology and pathology in this paper.Then the countermeasures to prevent the danger from disease of B. maydis in CMS hybrid pro-duction were proposed. 展开更多
关键词 CORN (Zea mays L. ) hybrid cytoplasmic MALE-STERILITY PATHOLOGY
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