Results 71 to 80 of about 19,032 (194)

Tetrodotoxin and Its Analogues in Cephalothrix cf. simula (Nemertea: Palaeonemertea) from the Sea of Japan (Peter the Great Gulf): Intrabody Distribution and Secretions

Toxins, 2020
Some nemertean species from the genus Cephalothrix accumulate tetrodotoxin (TTX) in extremely high concentrations. The current study is the first to provide high-performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS) data on tetrodotoxin
Anna E. Vlasenko, Timur Yu. Magarlamov
doaj   +1 more source

Astrocytic mGluR5 Regulation of Synaptic Transmission is Activity‐Dependent in Adult Rats

Glia, Volume 74, Issue 8, August 2026.
In adulthood, astrocytic mGluR5 increases synaptic efficacy through presynaptic A2ARs. This occurs when a small number of synapses are activated simultaneously. This pathway is abolished when numerous synapses are recruited. ABSTRACT Data accumulated over the last two decades have demonstrated that astrocytes play key roles in the regulation of ...
Sarah Mountadem, Muna L. Hilal, Dylan Pommier, Dorian Arnouil, Valentin Clément Langlais, Vincent Simon, Aurélie Amadio, Marie Miegebielle, Sébastien Marais, Charlène Joséphine, Astrid Cannich, Marjorie Varilh, Julien Bourel, Daniela Cota, Giovanni Marsicano, Alexis‐Pierre Bemelmans, Philippe Ciofi, Stéphane Henri Richard Oliet, Aude Panatier   +18 more
wiley   +1 more source

Endothelium‐ and epithelium‐derived novel endogenous catecholamines as modulators of the autonomic nervous system

British Journal of Pharmacology, Volume 183, Issue 15, Page 4091-4110, August 2026.
Abstract Catecholamines are classically viewed as neuronal transmitters and adrenal hormones; however, accumulating evidence demonstrates that sources other than nerve fibres and adrenal medulla play a fundamental role in local organ regulation. Physiological paradoxes, such as preserved organ function after denervation or transplantation, challenge a ...
Mariana G. de Oliveira, Edson Antunes, Fabiola Zakia Monica, Gilberto De Nucci   +3 more
wiley   +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

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

Elucidating the Origin of Tetrodotoxin in Pleurobranchaea maculata and Stylochoplana sp.

, 2015
Tetrodotoxin (TTX) is an extremely potent neurotoxin that acts by selectively targeting voltage gated sodium channels blocking propagation of action potentials.
Salvitti, Lauren R.
core  

Tetrodotoxin(TTX) Affects Survival Probability of Rough Skinned Newts (Taricha granulosa)Faced with TTX-Resistant Garter Snake Predators (Thamnophis sirtalis)

, 2010
Lethal chemical defenses in prey species can have profound effects on interactions with predators. The presence of lethal defenses in prey can correct the selective imbalance suggested by the life-dinner principle in which the fitness consequences of an ...
Edmund D. Brodie, Edmund D. Brodie III, Hanifin, C. T., Brodie, Edmund D., Jr., Williams, Becky L., Becky L. Williams, Charles T. Hanifin   +6 more
core   +1 more source

An Efficient Synthesis of Tetrodotoxin

, 2021
Tetrodotoxin (TTX) is an indispensable probe in neuroscience, a biosynthetic and ecological enigma, and one of the most celebrated targets of synthetic chemistry. Here, we present a stereoselective synthesis of TTX that proceeds in 22 steps starting from
Peter, Ruehmann, Bryan , Matsuura, Dirk, Trauner, David, Konrad, Hiroyasu, Ando, Belinda, Hetzler   +5 more
core   +1 more source

Dexmedetomidine Rapidly Relieves Stress‐Induced Hyperalgesia via Presynaptic α2‐Adrenergic Inhibition at Orbitofrontal–Insular Glutamatergic Synapses

MedComm, Volume 7, Issue 7, July 2026.
This study identified a maladaptive OFC–AIC glutamatergic circuit in stress‐induced hyperalgesia induction. This critical circuit provides an α2‐AR‐dependent braking target for dexmedetomidine to alleviate excessive glutamatergic transmission and hyperalgesia. ABSTRACT Dexmedetomidine (Dex), an α2‐adrenergic receptor (α2‐AR) agonist, is widely used for
Hui Rong, Yang‐Xun Zhang, Huijie Zhu, Yinyao Li, Yunfan Hou, Yun‐Yong Xie, Lu‐Yao Li, Bei‐Bei Zhang, Shu‐Tao Xie, Wei Zhang, Qi‐Peng Zhang, Xiao‐Yang Zhang, Jing‐Ning Zhu, Xiaoping Gu, Zhengliang Ma   +14 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