Home > ビデオ・アーカイブ

ビデオ・アーカイブ

本領域の事業の一環として,細胞運動のビデオのオンラインライブラリーを作成します.細菌,真核生物,アーキア(古細菌),ウイルス,タンパク質, 合成ポリマー,など様々なものの動きを公開します.それぞれのビデオは,私たちが生物学的に掲載価値があるかどうかを判断,分類し,和文と英文で解説します.

ライブラリー作成のため,皆さまに,(1) 研究者によるご自身の研究対象の投稿,(2) スーパーサイエンスハイスクールや生物部の活動などで顕微鏡をのぞいていて見つけた微生物の投稿,などをお願いします.また,(3) 論文のビデオなどで当ライブラリーにリンクしてほしいもの,(4) 周囲に眠っている古いビデオ教材などでアーカイブ化の価値がありそうなもの,については領域事務局までご一報ください.

ライブラリーのアクセスランキングを下記のリンク先で公開しています。直近の3か月のアクセス数の多いビデオ10本を見ることができます。

また、ビデオ・アーカイブをより手軽に楽しんで頂くために、閲覧用スマートフォンアプリを開発いたしました。
以下からダウンロードできますので、是非ご覧下さい。

ビデオ・アーカイブの収録ビデオの利用に関しては下記へご連絡下さい。

伊藤政博 (masahiro.ito@toyo.jp)
東洋大学生命科学部生命科学科 教授
〒374-0193 群馬県邑楽郡板倉町泉野1-1-1
電話&FAX:0276-82-9202(研究室)、0276-82-9305(5105実験室)

iOS版 Android版
ビデオライブラリQRコード iOS

ビデオライブラリQRコード Android
Get it on Google Play

ビデオ一覧

絞り込み検索

分類          
キーワード  

 

種名・頭文字から検索

頭文字
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

アクセスランキング

2014.09.17

原核生物
Myxococcus motility on agar

Laboratoire de Chimie Bacte´rienne, CNRS UMR 7283, Aix-Marseille Universite´ , Institut de Microbiologie de la Me´diterrane´ e, Marseille, France Professor Tam Mignot

Gram-negative bacterium Myxococcus xanthus used as a model system to address these fundamental questions. Specifically, using a multidisciplinary approach from the realms of genetics, biochemistry, cell biology, bioinformatics and quantitative physics to study the motility mechanism and its regulation in response to environmental cues, both at the single and multicellular levels. In the longer term, our goal is to build a high-resolution model of a bacterial multicellular life cycle integrating knowledge from experiments and computational simulations.

2014.09.17

モデル(解説を含む)
Myxococcus move on surfaces?

Laboratoire de Chimie Bacte´rienne, CNRS UMR 7283, Aix-Marseille Universite´ , Institut de Microbiologie de la Me´diterrane´ e, Marseille, France Professor Tam Mignot

We are interested in determining the mechanism of the so-called Myxococcus (A)-motility, a process where the bacterial cell moves smoothly along its long axis in absence of obvious extracellular organelles. Combining genetics, cell biology and physics, we have recently identified the motility machinery for the first time. Work from ours and other laboratories have led to a working model, proposing that ventral assembly of the motility complex promotes movement. However, how the machinery propels the cells is still obscure. How are traction forces produced? Is there a connection with the cytoskeleton? How is the directionality of the system dictated? Are some of the questions that we are trying to address. To do this, we are combining techniques from the realms of genetics, cell biology and physics. For more information, see Mignot et al. (2007), Sun, Wartel et al. (2011), Luciano, Agrebi et al. (2011).

2014.09.17

原核生物
How do Myxococcus cells direct their motility?

Laboratoire de Chimie Bacte´rienne, CNRS UMR 7283, Aix-Marseille Universite´ , Institut de Microbiologie de la Me´diterrane´ e, Marseille, France Professor Tam Mignot

Myxococcus cells can change their direction of movement by a process called a reversal where the poles exchange roles, allowing the bacteria to rapidly move in the opposite direction. Such rapid directional changes result from pole-to-pole switching of a central Ras-like small G-protein, MglA. Genetic control of these switches is at the heart of the Myxococcus multicellular lifestyle, swarming, prdation and fruiting body formation. How is MglA localization controlled dynamically? What signalling pathways control MglA localization? How is MglA regulating motility? How are those regulations affecting cell-cell cooperation in groups? For more information, see Mignot et al. (2005), Mauriello, Mouhamar et al. (2010), Zhang et al. (2010).

2014.09.17

原核生物
Chemoreceptor alignment following Myxococcus cell contact

Laboratoire de Chimie Bacte´rienne, CNRS UMR 7283, Aix-Marseille Universite´ , Institut de Microbiologie de la Me´diterrane´ e, Marseille, France Professor Tam Mignot

environment? Multicellular cooperation arises from cell-cell signalling and environment sensing and chemotaxis. The localization of a Myxococcus xanthus cytoplasmic receptor (Methyl-accepting Chemotaxis Protein, MCP) changes dynamically in response to cell contacts. This observation suggests that Myxococcus cells possess a “sense of touch” allowing cells to respond to the external environment by modulating coordinated cell movement. Myxococcus has a total of 21 MCP encoding genes. Some of them have been characterized genetically and biochemically. Similar to enteric bacteria, these receptors might be cross-linked with each other and form complex arrays ultimately generating sensory machineries. We are trying to characterize these sensory machineries and understand the link between the localization of bacterial chemoreceptors in cells and their function during chemotaxis

2014.09.17

原核生物
Gliding motility of Cellulophaga lytica observed at colony edges by phase contrast microscopy

UMR 7266 CNRS Littoral Environnement et Socie´te´ s, University of La Rochelle, La Rochelle, France Professor Eric Rosenfeld

The bacterium was grown on Cytophaga agar medium and movements were recorded during 1 minute (one photo every three seconds). Gliding reverse movements were visible. Motility was reduced in the central parts of the colony.

Plos One

2014.09.17

原核生物
Gliding motility of Cellulophaga lytica observed at colony extreme edges by phase contrast microscopy

UMR 7266 CNRS Littoral Environnement et Socie´te´ s, University of La Rochelle, La Rochelle, France Professor Eric Rosenfeld

The bacterium was grown on Cytophaga agar medium and movements were recorded during 1 minute (one photo every three seconds). A collective motion and the organization of cells into larger moving clusters were observed

Plos One

2014.09.17

原核生物
Dynamic formation of an iridescent glitter on the edges of a Cellulophaga lytica DSM 2040 colony after 24 h incubation on Cytophaga agar medium

UMR 7266 CNRS Littoral Environnement et Socie´te´ s, University of La Rochelle, La Rochelle, France Professor Eric Rosenfeld

The phenomenon was observed with a total duration of 50 minutes (one photo every minute). On the edges, spreading movements were well visible. Several layers seemed needed to observe the red iridescence from the glitter.

Plos One

2014.09.16

その他
Marvels of Bacterial Behavior - History & Physics

Harvard University, Department of Molecular and Cellular Biology Professor Howard Berg

Talk overview: Berg begins his lecture with a brief history of observations of bacterial motion. He then uses physics to describe the many hurdles that E. coli must overcome as it tries to swim up or down a chemical gradient. For instance, an entity as tiny as E. coli is constantly buffeted by Brownian motion and can neither stay still nor swim in a straight line. Then there is the question of how E. coli senses a gradient and translates that information into a change in its direction of movement. And finally, how does E. coli use its flagella to generate thrust at all? In Part 2, Berg explains that E. coli travels using a series of runs, when it moves in a straight line, and tumbles, when it changes direction. During a run, all of the flagella are moving counterclockwise in a tight bundle. During a tumble, one or more flagella switch to a clockwise movement and disengage from the bundle causing a change in the swimming direction. The motor that drives the rotation of the flagella is an amazing structure made of about 20 different protein parts. Berg tells us that chemosensory receptors on the cell surface detect a chemical gradient and transfer this information, via protein phosphorylation, to the motor. This chemical modification determines the direction of motor rotation and, hence, the direction the E. coli swims. An amazing system that E. coli has been perfecting for millions of years! Speaker biography: Howard Berg is the Herchel Smith Professor of Physics and a Professor of Molecular and Cellular Biology at Harvard University and a member of the Rowland Institute for Science at Harvard. He received his B.S. in Chemistry from the California Institute of Technology and his Ph.D. in Chemical Physics from Harvard University. Berg was on the faculty of the University of Colorado and Cal Tech before joining Harvard in 1986. Berg's lab applies methods from physics to biological problems. They strive to understand how a bacterium, such as E. coli, can sense changes in its environment and respond by swimming towards, or away from, a stimulus. To this end, the lab studies the mechanics of the bacterial flagellar motor and how it is regulated by signals from cell surface receptors. Berg has received numerous awards and honors for his work including election to the National Academy of Sciences and the American Academy of Arts and Sciences.

2014.09.16

その他
Marvels of Bacterial Behavior - Molecular Machinery

Harvard University, Department of Molecular and Cellular Biology Professor Howard Berg

Talk overview: Berg begins his lecture with a brief history of observations of bacterial motion. He then uses physics to describe the many hurdles that E. coli must overcome as it tries to swim up or down a chemical gradient. For instance, an entity as tiny as E. coli is constantly buffeted by Brownian motion and can neither stay still nor swim in a straight line. Then there is the question of how E. coli senses a gradient and translates that information into a change in its direction of movement. And finally, how does E. coli use its flagella to generate thrust at all? In Part 2, Berg explains that E. coli travels using a series of runs, when it moves in a straight line, and tumbles, when it changes direction. During a run, all of the flagella are moving counterclockwise in a tight bundle. During a tumble, one or more flagella switch to a clockwise movement and disengage from the bundle causing a change in the swimming direction. The motor that drives the rotation of the flagella is an amazing structure made of about 20 different protein parts. Berg tells us that chemosensory receptors on the cell surface detect a chemical gradient and transfer this information, via protein phosphorylation, to the motor. This chemical modification determines the direction of motor rotation and, hence, the direction the E. coli swims. An amazing system that E. coli has been perfecting for millions of years! Speaker biography: Howard Berg is the Herchel Smith Professor of Physics and a Professor of Molecular and Cellular Biology at Harvard University and a member of the Rowland Institute for Science at Harvard. He received his B.S. in Chemistry from the California Institute of Technology and his Ph.D. in Chemical Physics from Harvard University. Berg was on the faculty of the University of Colorado and Cal Tech before joining Harvard in 1986. Berg's lab applies methods from physics to biological problems. They strive to understand how a bacterium, such as E. coli, can sense changes in its environment and respond by swimming towards, or away from, a stimulus. To this end, the lab studies the mechanics of the bacterial flagellar motor and how it is regulated by signals from cell surface receptors. Berg has received numerous awards and honors for his work including election to the National Academy of Sciences and the American Academy of Arts and Sciences.

2014.09.16

真核生物
【ERATO】受精の瞬間の精細胞の動き 3D像

名古屋大学 WPI-ITbM 東山哲也

受精過程の精細胞核を、2光子レーザー顕微鏡を用いて撮影し、受精前、受精直後(細胞融合)、受精後の中央細胞核への移動に分けて3D像を作成しました。これによって、2つの精細胞が卵細胞および中央細胞の間にしばらく留まった後、再び動き始める時が中央細胞の細胞質に入った時(細胞融合すなわち受精)と一致していることが明らかになりました。

Science, 293, 1480-1483, 2001
Nature, 458, 357-361, 2009

721 件中 441-450 件目

このページの先頭へ