The metabolism of triolein in vitro was evaluated using isolated perfusion of a rat liver in tandem with an isolated rat hind-end. This permitted the study of lipid transfer between the two. In the absence of added triolein, a net removal of free fatty acids was demonstrated in both tissue beds when fatty acid gradients across tissue beds were measured. Following the addition of 100 mg of triolein (as [(3)H]-glycerol-[(14)C]triolein) to either reservoir in the system, an appreciable net production of free fatty acid was noted for the hind-end gradient at 30 minutes. This hind-end free fatty acid efflux amounted to more than one third of the catabolism of triolein.
In experimental studies, embolization of the cerebral hemisphere with triolein emulsion has revealed reversible magnetic resonance imaging (MRI) findings in the subacute stage. /The aim of this study was/ to investigate the changes in the major metabolites, by proton magnetic resonance spectroscopy (MRS), in a cerebral fat embolism induced by a triolein emulsion.The internal carotid arteries of 19 cats were injected with a triolein emulsion, and multivoxel MRS was performed 30 min, 1 day, and 7 days later. In the control group, six cats were injected with normal saline. The MR spectra were evaluated for N-acetyl aspartate (NAA), creatine (Cr), and choline (Cho), along with the presence of lipid and lactate. Semiquantitative analyses of NAA/Cr, Cho/Cr, NAA/Cho, and lipid/Cr ratios compared the median values of the ipsilateral metabolite ratios with those of the contralateral side and in the control group for each point in time.The NAA/Cr, Cho/Cr, and NAA/Cho ratios in the ipsilateral cerebral hemisphere of the embolized group after 30 min, 1 day, and 7days were not significantly different from the contralateral hemisphere of the embolized and control groups (P>0.05). The lipid/Cr ratio in the ipsilateral cerebral hemisphere of the embolized group was significantly higher when compared with the control group (P=0.012 at 30 min, P=0.001 on day 1, and P=0.018 on day 7). Cerebral fat embolism induced by a triolein emulsion resulted in no significant change in the major metabolites of the brain in the acute stage, except for an elevated lipid/Cr ratio, which suggests the absence of any significant hypoxic-ischemic changes in the lesions embolized using a fat emulsion.
Effects of protopanaxdiol (PDG) and protopanaxatriol (PTG) types of ginsenosides isolated from the leaves of American ginseng on porcine pancreatic lipase activity were determined in vitro. PDG inhibited the pancreatic lipase activity in a dose-dependent manner at the concentrations of 0.25-1 mg/mL. It inhibited hydrolysis of about 83.2% of triolein at about 1 mg/mL of PDG. However, PTG showed no inhibitory activity. Therefore, anti-obesity activity of PDG was evaluated in mice fed a high-fat diet. The results demonstrated that PDG was effective in preventing and healing obesity, fatty liver and hypertriglyceridemia in mice fed with a high-fat diet.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
副作用
职业性肝毒素 - 第二性肝毒素:在职业环境中的毒性效应潜力是基于人类摄入或动物实验的中毒病例。
Occupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.
来源:Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
IM administration of tetracycline hydrochloride 250 mg/kg /to rats/ significantly decreased the intestinal absorption of intragastrically administration triolein.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
相互作用
口服每千克2克新霉素,每日两次,在大鼠体内减少了(14)C标记的三油酸的肠道吸收。
The oral administration of 2 g neomycin/kg, twice daily, reduced in rats the in vivo intestinal absorption of (14)C-labeled triolein.
The purpose of this study is to evaluate the effect of dexamethasone on the damaged blood-ocular barrier caused by triolein emulsion, using contrast-enhanced MR imaging. An emulsion of 0.1-mL triolein in 20 mL of saline was infused into the carotid arteries of 32 cats, 12 cats were placed in the treatment group and 18 cats were placed in the Control group. Thirty minutes after the infusion of triolein emulsion, a set of orbital pre- and post-contrast T1-weighted MR images (T1WIs) were obtained. Infusion of 10 mg/kg dexamethasone into the ipsilateral carotid artery of each of the cats in the treatment group cats and 20 mL saline in each of the cats in the control group was given. A second set of pre- and post-contrast orbital T1WIs were obtained three hours following triolein emulsion infusion. Qualitative analysis was performed for the the anterior chamber (AC), the posterior chamber (PC), and in the vitreous humor of the ipsilateral and contralateral eyes. The signal intensity ratios of the ipsilateral eye over the contralateral eye were quantitatively evaluated in the three ocular chambers on the first and second set of T1WIs, and were then statistically compared. Qualitatively, the AC, the PC or the vitreous did not show immediate contrast enhancement on the first and the second set of post-contrast T1WIs. However, the AC and the PC showed delayed contrast enhancement for both groups of cats on the second pre-contrast T1WIs. No enhancement or minimally delayed enhancement was seen for the vitreous humor. Quantitatively, the signal intensity ratios in the PC of the treatment group of cats were statistically lower than the ratios of the control group of cats for the second set of T1WIs (p = 0.037). The AC and vitreous showed no statistically significant difference between the feline treatment group and control group (p > 0.05). Contrast-enhanced MR images revealed increased vascular permeability in the PC of the eye after infusion of triolein emulsion. Dexamethasone seems to decrease the breakdown of the blood-aqueous barrier in the PC.
Fat embolization (FE) is an often overlooked and poorly understood complication of skeletal trauma and some orthopedic procedures. Fat embolism can lead to major pulmonary damage associated with fat embolism syndrome (FES). A model of FE in unanesthetized rats, using intravenous injection of the neutral fat triolein, was used to study the potential therapeutic effect on lung histopathology of altering the production of, or response to, endogenous angiotensin (Ang) II. Either captopril, an Ang I converting enzyme inhibitor, or losartan, an Ang II type 1 receptor blocker, was injected 1 hour after FE by triolein injection. After euthanasia at 48 hours, histopathologic evaluation was used to compare the drug-treated animals with control animals that received only triolein. Histology of the lungs of rats treated only with triolein revealed severe, diffuse pathology. Alveolar septa showed severe, diffuse inflammation. Bronchial lumina showed severe mucosal epithelial loss. The media of the pulmonary small arteries and arterioles was thicker, and the lumen patency was reduced 60% to 70%. Trichrome staining confirmed the abundant presence of collagen in the media and adventitia, as well as collagen infiltrating the bronchial musculature. Both captopril and losartan treatments reduced the inflammatory, vasoconstrictor, and profibrotic effects present at 48 hr (p<0.001). With treatment, the vascular lumen remained patent, and the fat droplets were reduced in size and number. There was a reduction in the number of infiltrating leukocytes, macrophages, myofibroblasts, and eosinophils, along with a significant decrease in hemorrhage and collagen deposition (p<0.001). Pathologic changes in bronchial epithelium were also diminished. The results suggest that the use of drugs that act on the renin-Ang system might provide an effective and targeted therapy for fat embolism syndrome.
In the small intestine, most triglycerides are split into monoglycerides, free fatty acids, and glycerol, which are absorbed by the intestinal mucosa. Within the epithelial cells, resynthesized triglycerides collect into globules along with cholesterol and phospholipids and are encased in a protein coat as chylomicrons. Chylomicrons are transported in the lymph to the thoracic duct and eventually to the venous system. The chylomicrons are removed from the blood as they pass through the capillaries of adipose tissue. Fat is stored in adipose cells until it is transported to other tissues as free fatty acids which are used for cellular energy or incorporated into cell membranes.
When (14)C-labeled long-chain triglycerides are administered intravenously, 25% to 30% of the radiolabel is found in the liver within 30 to 60 minutes, with less than 5% remaining after 24 hours. Lesser amounts of radiolabel are found in the spleen and lungs. After 24 hours, nearly 50% of the radiolabel has been expired in carbon dioxide, with 1% of the carbon label remaining in the brown fat. The concentration of radioactivity in the epididymal fat is less than half that of the brown fat.
Rats were fed an emulsion diet (via stomach tube) consisting of 95 parts triolein (Glycerol Trioleate) and 5 parts glycerol 1- (14)C-trioleate. The percentage of administered glycerol 1- (14)C-trioleate that was identified in the lymph in 24 hours was 88%. In an earlier study four male rats (weights 250 g) were dosed orally with [1-(14)C]triolein. The percentage of radioactivity that was absorbed in 24 hours ranged from 57% to 92% (mean =78.2%). The percentage of absorbed activity that was recovered in the lymph fat from the thoracic duct ranged from 51% to 83% (mean =65.5%).
After a single dose of [1- (14)C]triolein was administered intravenously into fasted rats, a high rate of uptake was noted within the first hour in the following organs: liver, myocardium, gastric mucosa, and diaphragm. However, after 24 hours, radioactivity in these tissues had decreased markedly. A similar pattern of distribution was noted in mice; however, large amounts of radioactivity were also noted in the brown fat, white adipose tissue, and spleen, even after 24 hours.
采用反相液相色谱-大气压化学电离质谱(RP-HPLC/MS-APCI)分析分子中含有1-3个支链脂肪酸(FA)的合成三酰甘油(TAG)和前体制备的天然TAG在红球红球菌的培养中从缬氨酸、亮氨酸和异亮氨酸以及相应的支链短链酸进行定向生物合成。该技术使得识别和量化单个支链 FA 中不同的 TAG 成为可能。总共合成了 11 个 TAG,其中 8 个是立体定向合成的。支链和直链 TAG 被分离和鉴定,而仅异或反异 FA 不同的 TAG 无法分离。异链、反异链和直链 TAG 的 APCI 质谱完全相同。发现天然材料含有 19 个具有至少一种支链 FA 的 TAG。在六种不同底物上的培养表明,除了前体与等偶、异奇和反异 FA 的假定和常见结合外,还有一些不寻常的特征,例如添加 Val 后奇 FA 的含量增加(归因于Val 分解代谢为丙酸)或支链单不饱和 FA 的出现。两样本配对 t 检验,当应用于 TAG
[EN] QUINOLINE AND QUINAZOLINE COMPOUNDS<br/>[FR] COMPOSÉS QUINOLÉINE ET QUINAZOLINE
申请人:ACERTA PHARMA BV
公开号:WO2016055982A1
公开(公告)日:2016-04-14
In some embodiments, the invention relates to quinazoline and quinoline compounds of Formula I: (I) or a pharmaceutically acceptable salt thereof, or to pharmaceutical compositions comprising these compounds and to their use in therapy. In particular, in some embodiments, the present invention relates to quinazoline and quinoline compounds, pharmaceutical compositions thereof, and the use of the compounds and pharmaceutical compositions in the treatment of Bruton's tyrosine kinase (BTK) mediated disorders.
[EN] PHENOTHIAZINE DERIVATIVES AND USES THEREOF<br/>[FR] DÉRIVÉS DE PHÉNOTHIAZINE ET LEURS UTILISATIONS
申请人:CAMP4 THERAPEUTICS CORP
公开号:WO2019195789A1
公开(公告)日:2019-10-10
The present invention provides phenothiazine compounds, processes for their preparation, pharmaceutical compositions comprising the compounds, and the use of the compounds or the compositions in the treatment of various diseases or conditions, for example ribosomal disorders and ribosomopathies, e.g. Diamond Blackfan anemia (DBA).
Dibenzyl amine compounds and derivatives, pharmaceutical compositions containing such compounds and the use of such compounds to elevate certain plasma lipid levels, including high density lipoprotein-cholesterol and to lower certain other plasma lipid levels, such as LDL-cholesterol and triglycerides and accordingly to treat diseases which are exacerbated by low levels of HDL cholesterol and/or high levels of LDL-cholesterol and triglycerides, such as atherosclerosis and cardiovascular diseases in some mammals, including humans.
The present application provides compounds of formula: Methods of using these compounds for killing bacterial growth and treating bacterial infections are also provided.
本申请提供了以下化合物的公式:还提供了使用这些化合物杀灭细菌生长和治疗细菌感染的方法。
Compounds and uses thereof for decreasing activity of hormone-sensitive lipase
申请人:——
公开号:US20030166644A1
公开(公告)日:2003-09-04
Use of compounds to inhibit hormone-sensitive lipase, pharmaceutical compositions comprising the compounds, methods of treatment employing these compounds and compositions, and novel compounds. The present compounds are inhibitors of hormone-sensitive lipase and may be useful in the treatment and/or prevention of medical disorders where a decreased activity of hormone-sensitive lipase is desirable.