Results 71 to 80 of about 16,950 (172)

Electrostatic tuning of NaV channel activation by the domain II S3–S4 extracellular loop

The Journal of Physiology, EarlyView.
Abstract figure legend Voltage‐gated sodium (NaV) channels are critical for electrical signalling, yet the molecular determinants that tune isoform‐specific activation remain incompletely understood. Here, we show that charged amino acids in the extracellular DII S3–S4 loop of NaV1.7 play a key role in setting voltage‐dependent activation.
Ashvriya Thapa, Lotten Ragnarsson, Hue Tran, Angelo Keramidas, Jennifer R. Deuis, Irina Vetter   +5 more
wiley   +1 more source

Toxic mechanism and detection methods of tetrodotoxin [PDF]

MATEC Web of Conferences
Tetrodotoxin (TTX) was first isolated in the early 20th century and has significant public health implications, especially in areas where puffer fish are consumed, such as Japan.
Xu Yunzhe
doaj   +1 more source

The Microbial Community of Tetrodotoxin-Bearing and Non-Tetrodotoxin-Bearing Ribbon Worms (Nemertea) from the Sea of Japan

Marine Drugs, 2020
A potent marine toxin, tetrodotoxin (TTX), found in a great variety of marine and some terrestrial species, leaves intriguing questions about its origin and distribution in marine ecosystems. TTX-producing bacteria were found in the cultivable microflora
Daria I. Melnikova, Timur Yu. Magarlamov   +1 more
doaj   +1 more source

Impaired Motor Function in a Zebrafish Stathmin‐2 Knockout Model

Developmental Neurobiology, Volume 86, Issue 4, October 2026.
ABSTRACT Stathmin‐2 (STMN2) is a microtubule‐associated protein that plays a role in the stability of microtubules in axons of the nervous system of animals. In this study, we generated a novel zebrafish STMN2 knockout (KO) model. STMN2 is represented by two genes in the zebrafish genome: stmn2a and stmn2b.
Tyler J. N. Gurberg, Ziyaan A. Harji, Christian J. Rampal, Joséphine Sacy‐Richer, Amy Wang, Esteban C. Rodríguez, Gary A. B. Armstrong   +6 more
wiley   +1 more source

The toxic mechanism and application of tetrodotoxin (TTX)

MATEC Web of Conferences
Tetrodotoxin (TTX) is a powerful toxin related to nerve cells that is commonly discovered at loads of puffer fish, and working out the best way of cooking, whereas keeping the flavour but getting rid of the toxicity has challenged people for decades, which removing the organ with toxin is currently most certified.
openaire   +2 more sources

Recent research progress in tetrodotoxin detection and quantitative analysis methods

Frontiers in Chemistry
Tetrodotoxin (TTX) is a highly potent and widely distributed ion-channel marine neurotoxin; it has no specific antidote and poses a great risk to human health.
Chao Lin, Qirong Li, Dong Liu, Qiang Feng, Hengzong Zhou, Bohe Shi, Xinxin Zhang, Yurui Hu, Xinmiao Jiang, Xiaoming Sun, Dongxu Wang   +10 more
doaj   +1 more source

Dorso‐Ventral and Night‐Day Regulation of Extracellular K+ Dynamics in Mouse Hippocampal Astrocytes

Glia, Volume 74, Issue 9, September 2026.
Hippocampal astrocytic K+ buffering varies by region and time. Ventral astrocytes show faster K+ accumulation due to reduced Kir4.1 function. Such regional divergence is modulated by circadian shifts in Kir4.1 and gap junction coupling. ABSTRACT Astrocytes regulate extracellular potassium (K+) through multiple mechanisms operating across distinct ...
Nariman Kiani, Kabeer Abubakar, Tin Luka Petanjek, Monique Esclapez, Anton Ivanov, Christophe Bernard   +5 more
wiley   +1 more source

Activation of GHSRs Facilitates the Excitability of Dentate Gyrus Granule Cells and Short‐Term Spatial Memory via Multiple Ionic and Signaling Mechanisms

Advanced Biology, Volume 10, Issue 8, August 2026.
Ghrelin excites the dentate gyrus (DG) granule cells via GHSR‐mediated modulation of diverse ionic channels and activation of D1R, cAMP, and EPAC2. Similarly, overnight calorie restriction alters neuronal excitability in a ghrelin‐dependent manner. Infusion of ghrelin directly into the DG improves short‐term spatial memory in the Y‐maze, providing ...
Chidiebele S. Oraegbuna, Phani K. Kola, Simon L. Griggs, Saobo Lei   +3 more
wiley   +1 more source

Disordered but effective: short linear motifs as gene therapy targets for hyperexcitability disorders

The Journal of Clinical Investigation
Multiple approaches have targeted voltage-gated sodium (Nav) channels for analgesia. In this issue of the JCI, Shin et al. identified a peptide aptamer, NaViPA1, carrying a short polybasic motif flanked by serine residues in a structurally disordered ...
Sulayman D. Dib-Hajj, Stephen G. Waxman
doaj   +1 more source

Seasonal Changes in the Tetrodotoxin Content of the Flatworm Planocera multitentaculata

Marine Drugs, 2017
Tetrodotoxin (TTX) is a potent neurotoxin that acts specifically on voltage-gated sodium channels on excitable membranes of muscle and nerve tissues. The biosynthetic process for TTX is unclear, although marine bacteria are generally thought to be the ...
Riko Yamada, Tadasuke Tsunashima, Mitsuki Takei, Tatsunori Sato, Yoshiki Wajima, Makoto Kawase, Shotaro Oshikiri, Yusuke Kajitani, Keita Kosoba, Hiroyuki Ueda, Koko Abe, Shiro Itoi, Haruo Sugita   +12 more
doaj   +1 more source