Article
Biochemistry & Molecular Biology
Kogiku Shiba, Kazuo Inaba
Summary: Flagellar motility in sperm is activated and regulated by factors related to the eggs at fertilization. In this study, the researchers focused on the role of soluble adenylyl cyclase (sAC) in the regulation of flagellar motility in Ciona sperm chemotaxis. The results showed that sAC plays a key role in sperm chemotaxis by regulating the clearance of intracellular calcium ions ([Ca2+]i) and modulating Ca2+-dependent flagellar waveform conversion.
Article
Multidisciplinary Sciences
Sudarshan Gadadhar, Gonzalo Alvarez Viar, Jan Niklas Hansen, An Gong, Aleksandr Kostarev, Come Ialy-Radio, Sophie Leboucher, Marjorie Whitfield, Ahmed Ziyyat, Aminata Toure, Luis Alvarez, Gaia Pigino, Carsten Janke
Summary: This study demonstrates the importance of tubulin glycylation for controlled flagellar beating, directional sperm swimming, and male fertility by utilizing a mouse model lacking this modification. The lack of glycylation led to abnormal dynein arm conformations in sperm axonemes, resulting in subfertility in male mice due to aberrant beat patterns of sperm flagella.
Review
Microbiology
Remy Colin, Bin Ni, Leanid Laganenka, Victor Sourjik
Summary: Swimming bacteria can follow gradients of nutrients and signaling molecules for optimal growth, with chemotaxis enhancing efficiency in environmental colonization. The balance between individual and collective behaviors is crucial, with multiple roles of motility and chemotaxis in bacterial swarming, biofilm formation, and interactions with hosts.
FEMS MICROBIOLOGY REVIEWS
(2021)
Article
Fisheries
Vitaliy Kholodnyy, Kiko Shibata, Atife Tuba Beken, Borys Dzyuba, Hermes Bloomfield-Gadelha, Jacky Cosson, Sergii Boryshpolets
Summary: During evolution, fish have adopted diverse spawning tactics to effectively utilize sperm competition and prevent the fertilization of inappropriate male gametes. This study observed that common carps exhibit different spawning behavior compared to salmonids, and the presence of ovarian fluid (OF) altered the motility pattern and velocity of carp spermatozoa. The chemotactic test showed that carp spermatozoa responded significantly to OF, and this attraction phenomenon depended on the presence of external calcium ions. These findings highlight the significant impact of environmental conditions, particularly the presence of OF, on the performance of male gametes in common carp, aligning with their specific spawning behavior.
Article
Chemistry, Physical
Sushant Powar, Farin Yazdan Parast, Ashwin Nandagiri, Avinash S. Gaikwad, David L. Potter, Moira K. O'Bryan, Ranganathan Prabhakar, Julio Soria, Reza Nosrati
Summary: This study introduces an automated platform that uses thin-lens approximation and high-speed dark field microscopy to reconstruct sperm flagellar waveform in 3D, enabling analysis of sperm swimming behavior. The study found that head-tethered mouse sperm exhibit a rolling beating behavior in 3D, and discovered the properties of their flagellar waveform.
Article
Cell Biology
Jae Yeon Hwang, Huafeng Wang, Yonggang Lu, Masahito Ikawa, Jean-Ju Chung
Summary: In mammalian sperm cells, the regulation of spatiotemporal Ca2+ signaling relies on quadrilinear Ca2+ signaling nanodomains in the flagellar membrane. CatSpert, a C2 domain protein encoded by C2cd6, independently migrates to the flagella and serves as a major targeting component of the CatSper channel complex. CatSpert is essential for sperm hyperactivated motility and male fertility, and it targets the CatSper channel to the quadrilinear nanodomains in developing spermatids' flagella.
Article
Multidisciplinary Sciences
Tadaharu Yokogawa, Keiji Nagano, Mari Fujita, Hiroshi Miyakawa, Masahiro Iijima
Summary: Researchers discovered a mutant strain derived from Trepoenema denticola with a mutation on the chromosome, exhibiting different characteristics compared to the original strain. The mutant strain grew denser, formed colonies on agar medium, but had decreased motility and adhesion. This mutant strain could be useful for studying the genetic background responsible for the physiological and pathogenic characteristics of T. denticola.
Review
Biology
Rebeca Serrano, Luis J. Garcia-Marin, Maria J. Bragado
Summary: Approximately 24% of men undergoing assisted reproductive technology (ART) have idiopathic male infertility, which cannot be accurately diagnosed by current standard semen analysis. Proteomics, especially phosphoproteomics, has provided valuable insights into the regulation of sperm functions, such as motility, and male fertility. Further studies combining proteomic techniques with other omics technologies could enhance our understanding of the molecular mechanisms underlying sperm physiology and quality.
Article
Biochemistry & Molecular Biology
Kogiku Shiba, Kazuo Inaba
Summary: Spermatozoa can sense and respond to environmental signals to ensure successful fertilization. In the ascidian Ciona intestinalis, CNG channels play a vital role in regulating sperm motility and intracellular calcium regulation during chemotaxis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Vitaliy Kholodnyy, Borys Dzyuba, Marek Rodina, Hermes Bloomfield-Gadelha, Manabu Yoshida, Jacky Cosson, Sergii Boryshpolets
Summary: The fertilization of freshwater fish can be negatively affected by environmental factors, with egg and ovarian fluid playing a significant role in triggering gamete encounters. The ovarian fluid of rainbow trout affects sperm performance by inducing a chemotaxis-like effect on activated male gametes, creating an optimal environment for sperm performance. The individual interaction between egg (ovarian fluid) and sperm reflects specific features of the spawning process in this species.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Microbiology
Antonio Leal-Morales, Marta Pulido-Sanchez, Aroa Lopez-Sanchez, Fernando Govantes
Summary: This study elucidates the transcriptional organization and regulation of flagellar genes in the Pseudomonas putida genome. The synthesis of flagellar apparatus and chemotaxis machinery is regulated by a three-tier cascade, revealing the complexity and importance of the flagellar system in environmental pseudomonads.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Environmental Sciences
Zina Wen, Zhen Lei, Erpo Tian, Yiyan Wang, Ying Zhong, Ren-shan Ge
Summary: Ziram, an endocrine disruptor, can effectively inhibit sperm motility and forward motility, reduce the level of tyrosine protein kinase, and irreversibly impact sperm capacitation.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Biochemistry & Molecular Biology
Mark A. B. Kreutzberger, Ravi R. Sonani, Junfeng Liu, Sharanya Chatterjee, Fengbin Wang, Amanda L. Sebastian, Priyanka Biswas, Cheryl Ewing, Weili Zheng, Frederic Poly, Gad Frankel, B. F. Luisi, Chris R. Calladine, Mart Krupovic, Birgit E. Scharf, Edward H. Egelman
Summary: This study investigates the supercoiling structures of bacterial and archaeal flagellar filaments, revealing the atomic structures that enable stable supercoiling under torsional stress. The results suggest the significance of convergent evolution in microbial locomotion.
Article
Biochemistry & Molecular Biology
Qiushi Wang, Ruijun He, Qi Zhang, Jin Shan, Yanmei Zhao, Xia Wang
Summary: A study conducted on the nematode Ascaris suum revealed that uterus-derived factor (UDF) can attract sperm migration towards oocytes. This attraction is mediated by the release of ATP and an increase in protein serine phosphorylation (pS) levels in the sperm. These findings provide insights into the mechanism of sperm chemotaxis in Ascaris suum.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Genetics & Heredity
Ran Mo, Siqi Zhu, Yuanyuan Chen, Yuqian Li, Yugeng Liu, Beile Gao
Summary: This study revealed the co-evolutionary path of the chemosensory system and flagellar system and emphasizes the need for further investigation into the evolution of flagellar structural complexity in the Bacteria domain.
Article
Biochemistry & Molecular Biology
Satoshi Imamura, Sung-Pyo Hur, Yuki Takeuchi, Muhammad Badruzzaman, Angka Mahardini, Dinda Rizky, Akihiro Takemura
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2020)
Article
Chemistry, Analytical
Kei Zaitsu, Seiichiro Eguchi, Tomomi Ohara, Kenta Kondo, Akira Ishii, Hitoshi Tsuchihashi, Takakazu Kawamata, Akira Iguchi
ANALYTICAL CHEMISTRY
(2020)
Article
Fisheries
Shingo Udagawa, Sung-Pyo Hur, Jun-Hwan Byun, Hiroki Takekata, Yuki Takeuchi, Akihiro Takemura
JOURNAL OF FISH BIOLOGY
(2020)
Article
Multidisciplinary Sciences
Takefumi Yorisue, Akira Iguchi, Nina Yasuda, Yuki Yoshioka, Taku Sato, Yoshihisa Fujita
SCIENTIFIC REPORTS
(2020)
Article
Multidisciplinary Sciences
Takefumi Yorisue, Akira Iguchi, Nina Yasuda, Masaru Mizuyama, Yuki Yoshioka, Aika Miyagi, Yoshihisa Fujita
ROYAL SOCIETY OPEN SCIENCE
(2020)
Article
Zoology
Angka Mahardini, Dinda Rizky, Jun-Hwan Byun, Chihiro Yamauchi, Yuki Takeuchi, Akihiro Takemura
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2020)
Article
Zoology
Kodai Fukunaga, Fumika Yamashina, Yuki Takeuchi, Chihiro Yamauchi, Akihiro Takemura
Article
Multidisciplinary Sciences
Cristiana Manullang, Intan Herwindra Millyaningrum, Akira Iguchi, Aika Miyagi, Yasuaki Tanaka, Yukihiro Nojiri, Kazuhiko Sakai
Article
Multidisciplinary Sciences
Andrew H. Baird, James R. Guest, Alasdair J. Edwards, Andrew G. Bauman, Jessica Bouwmeester, Hanaka Mera, David Abrego, Mariana Alvarez-Noriega, Russel C. Babcock, Miguel B. Barbosa, Victor Bonito, John Burt, Patrick C. Cabaitan, Ching-Fong Chang, Suchana Chavanich, Chaolun A. Chen, Chieh-Jhen Chen, Wei-Jen Chen, Fung-Chen Chung, Sean R. Connolly, Vivian R. Cumbo, Maria Dornelas, Christopher Doropoulos, Gal Eyal, Lee Eyal-Shaham, Nur Fadli, Joana Figueiredo, Jean-Francois Flot, Sze-Hoon Gan, Elizabeth Gomez, Erin M. Graham, Mila Grinblat, Nataly Gutierrez-Isaza, Saki Harii, Peter L. Harrison, Masayuki Hatta, Nina Ann Jin Ho, Gaetan Hoarau, Mia Hoogenboom, Emily J. Howells, Akira Iguchi, Naoko Isomura, Emmeline A. Jamodiong, Suppakarn Jandang, Jude Keyse, Seiya Kitanobo, Narinratana Kongjandtre, Chao-Yang Kuo, Charlon Ligson, Che-Hung Lin, Jeffrey Low, Yossi Loya, Elizaldy A. Maboloc, Joshua S. Madin, Takuma Mezaki, Choo Min, Masaya Morita, Aurelie Moya, Su-Hwei Neo, Matthew R. Nitschke, Satoshi Nojima, Yoko Nozawa, Srisakul Piromvaragorn, Sakanan Plathong, Eneour Puill-Stephan, Kate Quigley, Catalina Ramirez-Portilla, Gerard Ricardo, Kazuhiko Sakai, Eugenia Sampayo, Tom Shlesinger, Leony Sikim, Chris Simpson, Carrie A. Sims, Frederic Sinniger, Davies A. Spiji, Tracy Tabalanza, Chung-Hong Tan, Tullia I. Terraneo, Gergely Torda, James True, Karenne Tun, Kareen Vicentuan, Voranop Viyakarn, Zarinah Waheed, Selina Ward, Bette Willis, Rachael M. Woods, Erika S. Woolsey, Hiromi H. Yamamoto, Syafyudin Yusuf
Summary: The discovery of multi-species synchronous spawning on the Great Barrier Reef in the 1980s led to efforts to document spawning times globally. The Coral Spawning Database (CSD) compiles data from over 100 sites in the Indo-Pacific region to provide open access for studying coral reproductive biology. The CSD aims to accelerate understanding of coral reproduction and to establish a baseline for evaluating future changes in reproductive patterns.
Article
Multidisciplinary Sciences
Mariko Iijima, Jun Yasumoto, Akira Iguchi, Kiyomi Koiso, Sayaka Ushigome, Natsuki Nakajima, Yuko Kunieda, Takashi Nakamura, Kazuhiko Sakai, Mina Yasumoto-Hirose, Kanami Mori-Yasumoto, Nanami Mizusawa, Haruna Amano, Atsushi Suzuki, Mitsuru Jimbo, Shugo Watabe, Ko Yasumoto
Summary: This study demonstrates the significant role of calcareous sediments in coral reefs in mediating the impact of terrestrial runoff on corals by storing and releasing phosphate. High phosphate concentrations in seawater inhibit the skeletal formation of coral juveniles.
ROYAL SOCIETY OPEN SCIENCE
(2021)
Article
Marine & Freshwater Biology
Akira Iguchi, Ipputa Tada, Atsushi J. Nagano, Nina Yasuda
Summary: The study used RADseq analysis to investigate the genetic structure of crown-of-thorns starfish populations in the Ryukyu Archipelago and Miyazaki, Japan. It found limited genetic differentiation and seemingly strong connectivity and gene flow among these populations, likely reflecting rapid range expansion through southern Japan or panmixia facilitated by the northward flowing Kuroshio Current.
Article
Environmental Sciences
Kenji Takata, Fumihito Iwase, Akira Iguchi, Hideaki Yuasa, Hiroki Taninaka, Nozomu Iwasaki, Kouji Uda, Tomohiko Suzuki, Masanori Nonaka, Taisei Kikuchi, Nina Yasuda
Summary: Estimating the spatial extent of gamete and larval dispersal of deep-sea coral species is challenging but crucial for their conservation. The study examined the spatial genetic structure of Corallium japonicum off the coast of Kochi, finding that over 700 neutral SNPs were needed to detect significant spatial genetic structure and suggesting the local extinction of the species within an approximately 11 km diameter should be avoided through over-harvesting prevention measures.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Satoshi Imamura, Sung-Pyo Hur, Yuki Takeuchi, Muhammad Badruzzaman, Angka Mahardini, Dinda Rizky, Akihiro Takemura
Summary: Photoperiod plays a role in controlling fish reproduction, and melatonin acts as an internal transducer of environmental photoperiod. The present study investigates the impact of melatonin on the transcript levels of several genes in the brain of the sapphire devil fish. It was found that melatonin treatment can inhibit the increase of certain gene transcripts, and the expression of these genes fluctuates with the day/night cycle.
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Chemistry, Analytical
Daisuke Kawakami, Mitsuki Tsuchiya, Tasuku Murata, Akira Iguchi, Kei Zaitsu
Summary: A rapid quantification method for extracellular neurotransmitters in mouse brain was developed using PESI/MS/MS and a Bayesian state-space model, enabling easy monitoring of neurotransmitters at high temporal resolutions. The method demonstrated high reproducibility and successfully detected abnormal changes in L-Glu and GABA levels in response to high-K+ -induced depolarization, with the potential to reveal hidden pathological mechanisms of brain diseases.
Article
Marine & Freshwater Biology
Junta Fujita, Akira Iguchi, Akira Tohkairin, Tomonori Hamatsu, Yoshiaki Kai
