When we look at Asian countries, with all their unique cultures and histories, we can be proud of our traditions, so different from country to a country. In contrast, science requires universality from us. However, until the end of 20th century, there was no such a common forum for chromosome science in Asia. In 1998, while the 18th International Congress of Genetics was being held in Beijing, China, chromosome researchers attending from Japan (Dr. Kiichi Fukui), China (Dr. Youzhi Ma), Korea (Prof. Jae-Wook Bang) and Th ailand (Dr. Somsac Apisitwanich) discussed the possibility of creating an Asian forum for chromosome researchers. An enthusiastic discussion followed and unanimously concluded with the decision to have the first Asian Chromosome Colloquium (ACC) at Beijing. One of the reasons why an ACC was agreed upon is that there was already a long tradition of bilateral conferences between China and Japan initiated in 1987 at Beijing (Hong 1989) and in 1992 at Tianjin (Tanaka 1992) by Profs. Hao Shui (Northeast Normal Univ.), Chen Ruiyang, (Tianjin Univ.), Hong Deyuan (Inst. Botany, Academia Sinica) Ryuso Tanaka, Kenji Taniguchi, and Masashi Nakata (Hiroshima Univ.). We always stand on the shoulders of the giants.
{"title":"ACC, an Asian forum for chromosome communities: Eighteen years on","authors":"K. Fukui","doi":"10.11352/SCR.18.65","DOIUrl":"https://doi.org/10.11352/SCR.18.65","url":null,"abstract":"When we look at Asian countries, with all their unique cultures and histories, we can be proud of our traditions, so different from country to a country. In contrast, science requires universality from us. However, until the end of 20th century, there was no such a common forum for chromosome science in Asia. In 1998, while the 18th International Congress of Genetics was being held in Beijing, China, chromosome researchers attending from Japan (Dr. Kiichi Fukui), China (Dr. Youzhi Ma), Korea (Prof. Jae-Wook Bang) and Th ailand (Dr. Somsac Apisitwanich) discussed the possibility of creating an Asian forum for chromosome researchers. An enthusiastic discussion followed and unanimously concluded with the decision to have the first Asian Chromosome Colloquium (ACC) at Beijing. One of the reasons why an ACC was agreed upon is that there was already a long tradition of bilateral conferences between China and Japan initiated in 1987 at Beijing (Hong 1989) and in 1992 at Tianjin (Tanaka 1992) by Profs. Hao Shui (Northeast Normal Univ.), Chen Ruiyang, (Tianjin Univ.), Hong Deyuan (Inst. Botany, Academia Sinica) Ryuso Tanaka, Kenji Taniguchi, and Masashi Nakata (Hiroshima Univ.). We always stand on the shoulders of the giants.","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77035182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kohei Kaneyoshi, Shota P. Fukuda, A. Dwiranti, Jun Kato, Y. Otsuka, H. Takata, S. Uchiyama, Shinichi Ogawa, K. Fukui
{"title":"Effects of dehydration and drying steps on human chromosome interior revealed by focused ion beam/scanning electron microscopy (FIB/SEM)","authors":"Kohei Kaneyoshi, Shota P. Fukuda, A. Dwiranti, Jun Kato, Y. Otsuka, H. Takata, S. Uchiyama, Shinichi Ogawa, K. Fukui","doi":"10.11352/SCR.18.23","DOIUrl":"https://doi.org/10.11352/SCR.18.23","url":null,"abstract":"","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74135909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kenta Adachi, T. Yokoi, Komei Inoue, T. Yoshinaga, S. Okumura
{"title":"Karyotype revision in the Iwagaki oyster Crassostrea nippona","authors":"Kenta Adachi, T. Yokoi, Komei Inoue, T. Yoshinaga, S. Okumura","doi":"10.11352/SCR.17.9","DOIUrl":"https://doi.org/10.11352/SCR.17.9","url":null,"abstract":"","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88717603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
5-azadeoxycytidine (5-aza-dC)-induced undercondensation (UC) was described with cultured lung fibroblasts from three mammalian species, Pipistrellus abramus , Millardia meltada , and Apodemus argenteus , all of which carry a large amount of C-heterochromatin (C-block) on their X chromosomes. The C-blocks were GC-rich in P. abramus , AT/GC-balanced in M. meltada , and AT-rich in A. argenteus , as revealed by fluorescent staining with quinacrine mustard (QM) and chromomycin A 3 (CMA). P. abramus conspicuously undercondensed, irrespective of autosomes or gonosomes, in all C-band regions including C-blocks. The extent of UC was most prominent in P. abramus , rather weak in M. meltada , and weakest in A. argenteus , suggesting a close relation to the amount of GC base pairs contained in C-heterochromatin. Thus 5-aza-dC treatment may be an easy method for detect-ing GC-rich heterochromatin. The appropriate conditions for inducing UC in the C-blocks were 10 -5 –10 -6 M and 2–3 hours. The decondensing effect of 5-aza-dC on the C-blocks was time- and concentration-dependent in all species examined, asynchronously acting with certain time lag between the early-replicating X and late-repli-cating X. The heteromorphic UC between the C-blocks of the XX homologue was observed with a frequency of 8% at maximum, reflecting the allocyclic behavior of the C-blocks.
{"title":"5-Azadeoxycytidine induced heteromorphic undercondensation in the C-blocks of X chromosomes of three mammalian species, Pipistrellus abramus, Millardia meltada, and Apodemus argenteus","authors":"Michitada Okada, Y. Obara, K. Tsuchiya","doi":"10.11352/SCR.17.3","DOIUrl":"https://doi.org/10.11352/SCR.17.3","url":null,"abstract":"5-azadeoxycytidine (5-aza-dC)-induced undercondensation (UC) was described with cultured lung fibroblasts from three mammalian species, Pipistrellus abramus , Millardia meltada , and Apodemus argenteus , all of which carry a large amount of C-heterochromatin (C-block) on their X chromosomes. The C-blocks were GC-rich in P. abramus , AT/GC-balanced in M. meltada , and AT-rich in A. argenteus , as revealed by fluorescent staining with quinacrine mustard (QM) and chromomycin A 3 (CMA). P. abramus conspicuously undercondensed, irrespective of autosomes or gonosomes, in all C-band regions including C-blocks. The extent of UC was most prominent in P. abramus , rather weak in M. meltada , and weakest in A. argenteus , suggesting a close relation to the amount of GC base pairs contained in C-heterochromatin. Thus 5-aza-dC treatment may be an easy method for detect-ing GC-rich heterochromatin. The appropriate conditions for inducing UC in the C-blocks were 10 -5 –10 -6 M and 2–3 hours. The decondensing effect of 5-aza-dC on the C-blocks was time- and concentration-dependent in all species examined, asynchronously acting with certain time lag between the early-replicating X and late-repli-cating X. The heteromorphic UC between the C-blocks of the XX homologue was observed with a frequency of 8% at maximum, reflecting the allocyclic behavior of the C-blocks.","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81462146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recently, RNA molecules in mammalian cells have been extensively studied, but their role in mitosis is not fully understood because of the mitotic repression of transcription, that is, the repression of transcripts from mitotic chromosomes. Several studies have identified the distribution and function of RNA molecules in mitosis; however, the relationships between RNA molecules and condensed chromosomes during mitosis have not been systematically studied. In this study, we investigat-ed specific RNA molecules during mitosis and identified structural components that surround the chromosomes, called Mitotic Chromosome Coating Spheres (MiCCS), by using an in-cell deproteinization assay. Furthermore, we observed the unique distribution patterns of the RNA molecules—in terms of mitotic chromosomes, MiCCS, mitotic cytoplasm, and outer membranes of mitotic cells—by using a mitotic three-dimensional RNA fluorescent in situ hybridization (3D-RNA-FISH). These data provide us with a novel perspective of the relationships between RNA molecules and mitotic chromosomes.
{"title":"Mitotic Chromosome Coating Spheres, MiCCS: Distinguished components of RNA molecules surrounding mitotic chromosomes in mammalian cells","authors":"M. Chiba, H. Tanabe","doi":"10.11352/SCR.13.35","DOIUrl":"https://doi.org/10.11352/SCR.13.35","url":null,"abstract":"Recently, RNA molecules in mammalian cells have been extensively studied, but their role in mitosis is not fully understood because of the mitotic repression of transcription, that is, the repression of transcripts from mitotic chromosomes. Several studies have identified the distribution and function of RNA molecules in mitosis; however, the relationships between RNA molecules and condensed chromosomes during mitosis have not been systematically studied. In this study, we investigat-ed specific RNA molecules during mitosis and identified structural components that surround the chromosomes, called Mitotic Chromosome Coating Spheres (MiCCS), by using an in-cell deproteinization assay. Furthermore, we observed the unique distribution patterns of the RNA molecules—in terms of mitotic chromosomes, MiCCS, mitotic cytoplasm, and outer membranes of mitotic cells—by using a mitotic three-dimensional RNA fluorescent in situ hybridization (3D-RNA-FISH). These data provide us with a novel perspective of the relationships between RNA molecules and mitotic chromosomes.","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80221339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cytogenetics investigation in different populations of Anthemis tinctoria L. (yellow camomile) accessions from Iran","authors":"H. Javadi, M. Alizadeh, H. Emami, P. S. Shanjani","doi":"10.11352/SCR.16.39","DOIUrl":"https://doi.org/10.11352/SCR.16.39","url":null,"abstract":"","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84312966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Taguchi, S. Kubota, T. Mezaki, S. Sekida, K. Okuda, S. Nakachi, Teruyuki Shinbo, Y. Iiguni, A. Tominaga
{"title":"Detection of characteristic heterochromatin distribution, highly amplified rRNA genes and presence of the human satellite III DNA motif in the scleractinian coral Echinophyllia aspera Ellis and Solander 1788","authors":"T. Taguchi, S. Kubota, T. Mezaki, S. Sekida, K. Okuda, S. Nakachi, Teruyuki Shinbo, Y. Iiguni, A. Tominaga","doi":"10.11352/SCR.16.33","DOIUrl":"https://doi.org/10.11352/SCR.16.33","url":null,"abstract":"","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76759191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Spectrum and frequency of meiotic aberrations induced by gamma rays and EMS in Cicer arietinum L.","authors":"A. Wani, M. Anis","doi":"10.11352/SCR.16.11","DOIUrl":"https://doi.org/10.11352/SCR.16.11","url":null,"abstract":"","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89817262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Karyotype and banding patterns of an anemonefish, Amphiprion perideraion (Pomacentridae, Perciformes)","authors":"A. Takai, S. Kosuga","doi":"10.11352/SCR.16.47","DOIUrl":"https://doi.org/10.11352/SCR.16.47","url":null,"abstract":"","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72897447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Change of heterogametic sex from male to female: Why so easy in the frog?","authors":"I. Miura, M. Ogata","doi":"10.11352/SCR.16.3","DOIUrl":"https://doi.org/10.11352/SCR.16.3","url":null,"abstract":"","PeriodicalId":10221,"journal":{"name":"Chromosome science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82114553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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