Abstract:
AIM:Seipin is a protein that resides in endoplasmic reticulum, and involved in both lipid metabolic disorders and motor neuropathy. The aim of this study was to investigate the effects of mutant seipin on autophagy system and the morphology of lipid droplets in vitro. METHODS:HEK-293, H1299 and MES23.5 cells were transfected with the plasmids of mutated seipin at glycosylation sites (N88S or S90L) and GFP-LC3 plasmids. The cells were subjected to immunofluorescence and flow cytometry assays, and the cell lysates were subjected to immunoblot analysis. Nile Red was used to stain the lipid droplets in the cells. RESULTS:Overexpression of the mutated seipin proteins N88S or S90L activated autophagy in the 3 cell lines, and substantially altered the sub-cellular distribution of the autophagosome marker GFP-LC3, leading to a number of large vacuoles appearing in the cytoplasm. The sub-cellular location of GFP-LC3 and mutated seipin proteins highly overlapped. Moreover, and the mutated seipin proteins caused diffuse small lipid droplets to fuse into larger lipid droplets. Treatment of mutated seipin-transfected cells with the autophagy inhibitor 3-MA (5 mmol/L) facilitated the fusion of mutated seipin-induced large vacuoles. The protein glycosylation inhibitor tunicamycin could mimic the mutated seipin-induced effects, and treatment of the wild-type seipin-transfected cells with tunicamycin (2.5 μg/mL) produced similar morphological and biochemical properties as in the mutated seipin-transfected cells. CONCLUSION:The mutation of seipin at glycosylation sites disrupt its function in regulating lipid droplet metabolism, and the autophagy acts as an adaptive response to break down abnormal lipid droplets. The interruption of autophagy would accelerate the fusion of abnormal lipid droplets.
journal_name
Acta Pharmacol Sinjournal_title
Acta pharmacologica Sinicaauthors
Fan HD,Chen SP,Sun YX,Xu SH,Wu LJdoi
10.1038/aps.2014.164subject
Has Abstractpub_date
2015-04-01 00:00:00pages
497-506issue
4eissn
1671-4083issn
1745-7254pii
aps2014164journal_volume
36pub_type
杂志文章abstract::The serum and glucocorticoid-regulated kinase (SGK) family has been implicated in the regulation of many cellular processes downstream of the PI3K pathway. It plays a crucial role in PI3K-mediated tumorigenesis, making it a potential therapeutic target for cancer. SGK family consists of three isoforms (SGK1, SGK2, and...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/s41401-018-0087-6
更新日期:2018-12-01 00:00:00
abstract:AIM:To investigate the mechanism of brain interleukin-1 beta (IL-1 beta) in reserpine-induced behavioral depression in rats. METHODS:Porsult swim test was used in the measurement of depressive behavior and ELISA was used in measurement of brain IL-1 beta. RESULTS:Intraperitoneal injection of reserpine (0, 4, 6, and 8...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2004-03-01 00:00:00
abstract:AIM:To explore whether the differential effects of Zn2+ on ryanodine binding to the sarcoplasmic reticulum (SR) of skeletal and cardiac muscles resulted from different permeability of the SR to Zn2+. METHODS:[3H]ryanodine binding assays were performed to examine the effect of Zn2+ on ryanodine binding to the SR in the...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2004-12-01 00:00:00
abstract::In this brief review we summarize the current fndings relative to the discovery of a small peptide ligand, phoenixin (PNX). Using a bioinformatic approach, two novel peptides PNX-14 and PNX-20 containing 14 and 20 amino acids, respectively, were isolated from diverse tissues including the brain, heart, lung and stomac...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
doi:10.1038/aps.2017.195
更新日期:2018-05-01 00:00:00
abstract:AIM:To evaluate the pharmacokinetics of L-threonate after single or multiple oral administrations and its safety profile in healthy Chinese volunteers. METHODS:This was an open-label, single- and multiple-dose study. The subjects were assigned to receive a single dose, 675, 2025, or 4050 mg, of calcium L-threonate (n=...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2011.138
更新日期:2011-12-01 00:00:00
abstract:AIM:To study the effects of the caspase-1 inhibitor Ac-YVAD-CHO on quinolinic acid (QA)-induced apoptosis. METHODS:Rats were pre-treated with intrastriatal infusion of Ac-YVAD-CHO (2-8 microg) before intrastriatal injection of QA (60 nmol). Striatal total proteins, genomic DNA, and nuclear proteins were isolated. The ...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2005.00525.x
更新日期:2005-02-01 00:00:00
abstract:AIM:To study the effect of semi-synthesized quercetin water-soluble derivatives sodium quercetin-7-sulfate (SQMS) and disodium quercetin-7,4 -disulfate (SQDS) on recombinant human phosphatidylinositol 3-kinase (PI3-K) p110 beta catalytic subunit. METHODS:Recombinant human PI3-K p110 beta catalytic subunit was expresse...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2002-04-01 00:00:00
abstract:AIM:Oral risedronate is effective in the treatment of postmenopausal osteoporosis when administered daily, weekly, or monthly. In this 1-year, randomized, double-blind, multicenter study we compared the weekly 35-mg and daily 5-mg risedronate dosing regimens in the treatment of Chinese postmenopausal women with osteopo...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1038/aps.2015.30
更新日期:2015-07-01 00:00:00
abstract:AIM:Ischemia/reperfusion is an initial triggering event that leads to gut-induced acute lung injury (ALI). In this study, we investigated whether hypoxia inducible factor-1α (HIF-1α) played a role in the pathogenesis of lung injury induced by trauma and hemorrhagic shock (T/HS). METHODS:Male Wistar rats underwent lapa...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2012.5
更新日期:2012-05-01 00:00:00
abstract:AIM:To investigate the effect of melittin (Mel) on papillary muscles of guinea pigs. METHODS:Contraction of papillary muscles were examined by conventional method and action potentials (AP) were recorded by standard glass microelectrode technique. RESULTS:Mel (0.5, 3 micromol/L) significantly increased the contractil...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2001-08-01 00:00:00
abstract:AIM:To study the effect of new antihepatitis drug, bicyclol, on the metabolism and hepatotoxicity of aflatoxin B1 (AFB1) in rats. METHODS:Rats were given bicyclol 300 mg/kg/d ig for 3 d and then injected ip with AFB1 1.5 mg/kg. Liver damages were examined 16 h after ip AFB1. The in vitro metabolism of AFB1 by bicyclol...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2002-10-01 00:00:00
abstract:AIM:To investigate the postantibiotic effects (PAE) of different classes of antimicrobials against five different types of bacteria. METHODS:Minimal inhibitory concentrations (MIC) were determined by twofold macrodilution in broth. The antimicrobial agents were eliminated by washing method after the bacteria were expo...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2001-09-01 00:00:00
abstract:AIM:To test whether carbachol can influence endothelial barrier dysfunction induced by tumor necrosis factor (TNF)-α and whether the alpha 7 nicotinic receptor can mediate this process. METHODS:Rat cardiac microvascular endothelial cells were exposed to carbachol followed by TNF-α treatment in the presence or the abse...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2010.165
更新日期:2010-10-01 00:00:00
abstract:AIM:To examine the interactions of allopregnanolone and phenobarbital for the protection against seizures. METHODS:The protective activity of allopregnanolone and/or phenobarbital against seizures was studied in the C57 mice, using the maximal electroshock seizure (MES) test. The modulations by allopregnanolone and/or...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2001-04-01 00:00:00
abstract::Type 2 diabetes (T2D) and Alzheimer's disease (AD) share several common pathophysiological features. Huperzine A (Hup A), a Lycopodium alkaloid extracted from the Chinese herb moss Huperzia serrata, is a specific and reversible inhibitor of acetylcholinesterase, which is clinically used for the treatment of AD. In thi...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/s41401-019-0257-1
更新日期:2020-02-01 00:00:00
abstract:AIM:Recent studies have shown that constitutive activation of the nuclear factor κB (NF-κB) plays a key role in chronic inflammation and cancers. The aim of this study was to characterize lobolide, a cembrane diterpene, as a drug candidate targeting the NF-κB signaling pathway. METHODS:A HEK 293/NF-κB-Luc stable cell ...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2012.100
更新日期:2012-10-01 00:00:00
abstract:AIM:To evaluate the nasal absorption enhancement of insulin by sodium deoxycholate (SDC) in combination with cyclodextrins (CD). METHODS:The concentration of glucose in blood was measured. Scanning electron microscopy technique was used to investigate the effect of enhancers on the nasal mucocilia. The effect of SDC i...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2001-11-01 00:00:00
abstract::Angiogenesis, the formation of new blood vessels from the pre-existing vasculature is essential for embryonic development and tissue homeostasis. It also plays critical roles in diseases such as cancer and retinopathy. A delicate balance between pro- and anti-angiogenic factors ensures normal physiological homeostasis...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
doi:10.1038/aps.2015.73
更新日期:2015-10-01 00:00:00
abstract::Autophagy is a cell self-digestion process via lysosomes that clears "cellular waste", including aberrantly modified proteins or protein aggregates and damaged organelles. Therefore, autophagy is considered a protein and organelle quality control mechanism that maintains normal cellular homeostasis. Dysfunctional auto...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
doi:10.1038/aps.2012.188
更新日期:2013-05-01 00:00:00
abstract:AIM:To determine whether mycophenolate mofetil (MMF) has beneficial effects on refractory idiopathic thrombocytopenic purpura (ITP) and the corresponding cellular mechanism. METHODS:Twenty refractory ITP patients resistant to corticosteroid and/or splenectomy and chemical therapy were given MMF 1.5-2.0 g/d orally for ...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2005.00088.x
更新日期:2005-05-01 00:00:00
abstract::Androgen and androgen receptor (AR) signaling are crucial for the genesis of prostate cancer (PCa), which can often develop into androgen-ligand-independent diseases that are lethal to the patients. Recent studies show that even these hormone-refractory PCa require ligand-independent AR signaling for survival. As curr...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
doi:10.1111/j.1745-7254.2007.00683.x
更新日期:2007-09-01 00:00:00
abstract:AIM:To ascertain the effects of erlotinib on CYP3A, to investigate the amplitude and kinetics of erlotinib-mediated inhibition of seven major CYP isoforms in human liver microsomes (HLMs) for evaluating the magnitude of erlotinib in drug-drug interaction in vivo. METHODS:The activities of 7 major CYP isoforms (CYP1A2,...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2010.218
更新日期:2011-03-01 00:00:00
abstract:AIM:to investigate the changing resistance to nondepolarizing muscle relaxants (NDMRs) during the first month after denervation. METHODS:the denervated and innervated skeletal muscle cells were examined on days 1, 4, 7, 14, 21, and 28 after denervation. Individual denervated and innervated cells were prepared from the...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2010.163
更新日期:2010-12-01 00:00:00
abstract:AIM:To investigate the antitumor actions of the Crotalus durissus neurotoxin (crotoxin) on human esophageal carcinoma (Eca-109) cells in vitro and transplanted esophageal Eca-109 tumors in nude mice. METHODS:The growth-inhibitory effect was analyzed in Eca-109 cells using MTT assay. Cell morphology changes in nuclei w...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2012.156
更新日期:2013-02-01 00:00:00
abstract::As autophagy is involved in cell growth, survival, development and death, impaired autophagic flux has been linked to a variety of human pathophysiological processes, including neurodegeneration, cancer, myopathy, cardiovascular and immune-mediated disorders. There is a growing need to identify and quantify the status...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
doi:10.1038/aps.2012.184
更新日期:2013-05-01 00:00:00
abstract::Recent evidence shows that resveratrol (RSV) may ameliorate high-glucose-induced cardiac oxidative stress, mitochondrial dysfunction and myocardial fibrosis in diabetes. However, the mechanisms by which RSV regulates mitochondrial function in diabetic cardiomyopathy have not been fully elucidated. Mitochondrial dysfun...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2017.50
更新日期:2018-01-01 00:00:00
abstract::The fibroblast growth factor receptors (FGFRs) are increasingly considered attractive targets for therapeutic cancer intervention due to their roles in tumor metastasis and angiogenesis. Here, we identified a new selective FGFR inhibitor, C11, and assessed its antitumor activities. C11 was a selective FGFR1 inhibitor ...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/s41401-018-0191-7
更新日期:2019-06-01 00:00:00
abstract:AIM:To study the effects of recombinant human macrophage colony-stimulating factor (rhM-CSF) expressed in silkworm on cytokine productions and membrane molecule expressions of monocytes. METHODS:The rhM-CSF was added to the human peripheral blood monocyte cultures and 3 d later, the culture supernatants and cells were...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2000-09-01 00:00:00
abstract:AIM:Glucagon-like peptide-1 (GLP-1) agonists and dipeptidyl peptidase-4 (DPP-4) inhibitors can not only lower blood glucose levels, but also alleviate cardiac remodeling after myocardial ischemia and hypertension. In the present study, we investigated the effects of a DPP-4 inhibitor (linagliptin) and a GLP-1 activator...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2016.72
更新日期:2016-09-01 00:00:00
abstract::The combination of technological advances, genomic sequences and market success is catalyzing rapid development of antibody-based therapeutics. Cell surface receptors and ion channel proteins are well known drug targets, but the latter has seen less success. The availability of crystal structures, better understanding...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2012.202
更新日期:2013-02-01 00:00:00