Article
Biochemistry & Molecular Biology
Volker Herzig, Yong-Cyuan Chen, Yanni K-Y Chin, Zoltan Dekan, Yu-Wang Chang, Hui-Ming Yu, Paul F. Alewood, Chien-Chang Chen, Glenn F. King
Summary: This study identified a tarantula venom from Avicularia spec. that can inhibit specific subtypes of T-type calcium channels, with the active toxin being omega-Avsp1a. The research suggests that omega-Avsp1a can inhibit specific subtypes of T-type calcium channels, and the domain-1 of Ca(V)3.3 is crucial for this inhibitory effect.
Article
Biochemistry & Molecular Biology
Nanami Goto, Shusaku Shibutani, Noboru Miura, Rie Watanabe, Hiroyuki Iwata
Summary: This study investigated the effects of AGP glycosylation and ER stress on AGP secretion, finding that glycosylation deficiency and ER stress had minimal impact on AGP secretion, while thapsigargin significantly suppressed AGP secretion in a glycosylation-independent manner. The secretion of AGP seems to be regulated through a thapsigargin-sensitive pathway that may be further controlled by intracellular calcium concentrations.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Jing Xu, Ichiro Kawahata, Hisanao Izumi, Kohji Fukunaga
Summary: SAK3 activates CaMKII to enhance proteasomal activity, leading to the degradation of α-Syn and slowing down the progression of LBD. This study reveals the promoting effect of SAK3 on α-Syn pathology.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Yan-Song Ye, Rui Liu, Na-Na Jiang, Song-Yu Li, Yin Nian, Gang Xu
Summary: Five caged polycyclic polyprenylated acylphloroglucinols, including a novel octahydro-2,5-methanoindene skeleton, were discovered from Hypericum curvisepalum. Compounds 1 and 2 exhibit potent inhibitory effects on the Ca(v)3.2 T-type Ca2+ channel, with compound 2 also showing strong analgesic effects in mice.
CHEMICAL COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Masaki Morishima, Takafumi Fujita, Satoshi Osagawa, Hiroshi Kubota, Katsushige Ono
Summary: The research revealed a novel regulatory action of BDNF on the expression of T-type Ca2+ channels Cav3.1 and Cav3.2 in rat neonatal cardiomyocytes through the HIF-1 alpha-dependent pathway. Under hypoxic conditions, BDNF was able to inhibit the upregulation of Cav3.1 and Cav3.2, thereby affecting the physiological status of cardiomyocytes by interfering with the HIF-1 alpha pathway.
Article
Multidisciplinary Sciences
Maria Casas, Karl D. Murray, Keiko Hino, Nicholas C. Vierra, Sergi Simo, James S. Trimmer, Rose E. Dixon, Eamonn J. Dickson
Summary: The loss of NPC1 function alters the nanoscale distribution and function of ion channels, leading to abnormal calcium entry, mitochondrial dysfunction, and neurotoxicity. These findings provide insights into the molecular mechanisms connecting NPC1 loss to NPC-associated neuropathology.
NATURE COMMUNICATIONS
(2023)
Article
Cell Biology
Beibei Wu, Jin Seok Woo, Pamela Vila, Marcus Jew, Jennifer Leung, Zuoming Sun, Sonal Srikanth, Yousang Gwack
Summary: In effector T cells, the pore subunit of CRAC channels, ORAI1, is limited in plasma membrane localization with a significant fraction trapped in intracellular vesicles. NKD2, an essential component of ORAI1(+) vesicles activated by signaling pathways downstream of T cell receptors, orchestrates trafficking and insertion of ORAI1(+) vesicles to the plasma membrane. T cell receptor (TCR)-stimulation-dependent insertion of ORAI1 into the plasma membrane is essential for sustained calcium signaling and cytokine production in T cells.
Article
Cardiac & Cardiovascular Systems
Pu Wang, Xiufang Zhu, Mengyan Wei, Yangong Liu, Kenshi Yoshimura, Mingqi Zheng, Gang Liu, Shinichiro Kume, Tatsuki Kurokawa, Katsushige Ono
Summary: This study investigated the impact of N-linked glycosylation disruption on the Na+ channel and found that disrupting N-linked glycosylation increased Na(V)1.5 channel current and changed its gating properties by altering the glycan environment of the channel protein.
Article
Pharmacology & Pharmacy
Jose Ignacio Veytia-Bucheli, Den Alejandro Alvarado-Velazquez, Lourival Domingos Possani, Roberto Gonzalez-Amaro, Yvonne Rosenstein
Summary: Verapamil, a Ca2+ channel blocker, inhibits T cell activation and reduces cytokine production, suggesting its potential relevance in patients receiving CCBs.
Article
Multidisciplinary Sciences
Eunbyul Cho, Youngsik Woo, Yeongjun Suh, Bo Kyoung Suh, Soo Jeong Kim, Truong Thi My Nhung, Jin Yeong Yoo, Tran Diem Nghi, Su Been Lee, Dong Jin Mun, Sang Ki Park
Summary: The authors developed a MAM-specific BRET-based Ca2+ indicator called MAM-Calflux, which serves as both a Ca2+ indicator and a structural marker. It can estimate steady-state MAM Ca2+ levels and visualize abnormally accumulated MAM Ca2+ in Parkinson's disease mouse model. MAM-Calflux can be a versatile tool for ratiometric measurement of dynamic inter-organellar Ca2+ communication.
NATURE COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
James M. Heather, Matthew J. Spindler, Marta Herrero Alonso, Yifang Ivana Shui, David G. Millar, David S. Johnson, Mark Cobbold, Aaron N. Hata
Summary: The study and manipulation of T cell receptors (TCRs) are crucial in immunology research. Stitchr is a software tool that can generate complete TCR coding sequences based on minimal V/J/CDR3 information, increasing the speed and reproducibility of TCR research.
NUCLEIC ACIDS RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Shogo Hamaguchi, Ikue Morinou, Yuko Shiseki, Ayako Mikami, Maika Seki, Iyuki Namekata, Hikaru Tanaka
Summary: Mechanisms of alpha-adrenoceptor-mediated positive inotropy were investigated in neonatal mouse ventricular myocardium. The positive inotropy induced by phenylephrine was suppressed by prazosin, nifedipine, and chelerythrine, but not by SEA0400. Phenylephrine increased L-type Ca2+ channel current and prolonged action potential duration, while voltage-dependent K+ channel current was unaffected. In the presence of cromakalim, the phenylephrine-induced prolongation of action potential duration and positive inotropy were smaller than in its absence, suggesting the involvement of ATP-sensitive K+ channels.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Medicine, Research & Experimental
Yuan Zhang, Zhiyuan Qian, Dongsheng Jiang, Yufang Sun, Shangshang Gao, Xinghong Jiang, Hua Wang, Jin Tao
Summary: The study revealed that Nmb stimulates Cav3.2 channels through NmbR via a G(beta gamma)-dependent AMPK/PKA pathway, leading to hyperexcitability of TG neurons and pain hypersensitivity in mouse models.
Article
Cell Biology
Sua Jeong, Ji Seon Shim, Seok Kyo Sin, Kang-Sik Park, Jung-Ha Lee
Summary: This study identified 30 phosphorylation sites in the cytoplasmic regions of Ca(v)3.1 channels using mass spectrometry and illustrated them as a phosphorylation map. Functional analysis showed that the phosphosites at the N- and C-terminal regions play crucial roles in regulating the channel activity and voltage-dependent gating properties of Ca(v)3.1 channels.
JOURNAL OF CELLULAR PHYSIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Ryan Mahling, Cade R. Rahlf, Samuel C. Hansen, Matthew R. Hayden, Madeline A. Shea
Summary: FGFs and CaM directly bind to the Na-V channel and play a key role in regulating channel function, especially A-type FGFs can compete with (Ca2+)(4)-CaM for binding, thereby modulating channel function.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2021)