The metabolism of Acesulfame K was investigated in the urine and feces of rats and dogs which had received single oral doses of 10 mg/kg bw, and in the urine and bile of pigs dosed orally with 5 mg/kg bw. The analytical methods used (thin-layer chromatography, mass spectrometry and isotope dilution) detected only the original substance in these samples. Separation by TLC of urinary extracts from rats used in the above study revealed only one peak which was identical with Acesulfame K. No metabolites were detected in control or Acesulfame K-pretreated animals. Similarly, no metabolites were detected in animals which had been pretreated with 1% Acesulfame K for 7 days. /Acesulfame K/
来源:Hazardous Substances Data Bank (HSDB)
代谢
Acesulfame K 的代谢情况在志愿者单次服用 30 毫克/人后,通过血清和尿液样本进行了研究。在所有样本中只检测到了原始物质。/Acesulfame K/
The metabolism of Acesulfame K was studied in serum and urine from human volunteers following a single dose of 30 mg/individual. Only the original substance was detected in all samples. /Acesulfame K/
IDENTIFICATION AND USE: Acesulfame (AS) is a solid. It is used as artificial sweetener for food, also used in cosmetics. HUMAN STUDIES: A case study is reported whereby an individual with known sulfite and sulfonamide allergies develops hypersensitivity to taurine above a threshold level as well as to the non-nutritive sweetener acesulfame potassium, compounds that are not normally associated with allergic reactions. In vitro studies suggested that long-term consumption of AS might accelerate atherosclerosis and senescence via impairment of function and structure of apoA-I and HDL. ANIMAL STUDIES: Acesulfame K was non-irritant in a primary dermal irritation test in the rabbit. Acesulfame K showed no antigenic effect and only the guinea pigs sensitized with BSA showed anaphylactic reactions. Acesulfame K was not carcinogenic in mice or rats. A multigeneration study in rats was carried out, in which males and females received Acesulfame K at dietary levels of 0, 0.3, 1.0 and 3.0% for three successive generations, each comprising two consecutive litters. Growth rate was slightly decreased in the top dose group of the F0 and F1 generations, and the mid-dose group of the F0 generation. In the teratogenicity studies, no adverse effects were seen in appearance, food consumption, autopsy of the dams, organ weights, or litter data; no visceral or skeletal abnormalities attributable to the treatment were observed. Acesulfame K was negative in the genotoxicity studies in vivo and in vitro, including Ames tests in S. typhimurium TA98, TA100, TA15325, TA1537, TA1538 at 0-100 mg/plate, 4-5000 ug/plate and in E.Coli WP2uvrA at 4-5000 ug/plate. ECOTOXICITY STUDIES: AS is listed as an emerging contaminant due to its environmental persistence and wide occurrence in the environment. An increased toxicity of AS after UV irradiance was observed in the liver of Carassius auratus exposed to AS and its irradiation products. Embryotoxicity tests showed that AS transformation products at the low g/L level produced significant adverse effects in tail detachment, heart rate, hatching rate and survival rate during fish embryo development.
◉ Summary of Use during Lactation:Acesulfame has been found in variable concentrations in the breastmilk of nursing mothers who report consuming artificially sweetened beverages and sweetener packets in the past 24 hours. Even some mothers who reported not consuming artificial sweeteners have small amounts of acesulfame in their breastmilk. However, it is not likely to reach an intake greater than the acceptable daily intake. Ingestion of diet drinks containing low-calorie sweeteners might increase the risk of vomiting in breastfed infants. Some authors suggest that women may wish to limit the consumption of nonnutritive sweeteners while breastfeeding because their effect on the nursing infants are unknown.
◉ Effects in Breastfed Infants:A cross-sectional survey assessed the dietary history of US mothers nursing infants between 11 and 15 weeks of age. The survey was used to estimate the amount of diet soda and fruit drinks consumed by the women. There were no statistically significant differences in infants’ weight or z-scores based on low calorie sweetener exposure. However, infants exposed to low calorie sweetener in milk once or less per week had a statistically significantly higher risk of vomiting than those who were not exposed. Greater exposure was not associated with vomiting. It was not possible to assess the effects of specific sweeteners.
◉ Effects on Lactation and Breastmilk:Relevant published information was not found as of the revision date.
The ecotoxicity of heavy metals depends much on their speciation, which is influenced by other co-existing substances having chelating capacity. In the present study, the toxic effects of Cd(2+) and Cu(2+) on a green algae Scenedesmus obliquus were examined in the presence of two artificial sweeteners (ASs), acesulfame (ACE) and sucralose (SUC) by comparing the cell specific growth rate mu and pulse-amplitude-modulated (PAM) parameters (maximal photosystem II photochemical efficiency Fv/Fm, actual photochemical efficiency Yield, and non-photochemical quenching NPQ) of the algae over a 96-hr period. Simultaneously, the bioconcentration of the metals by the algal cells in the presence of the ASs was measured. The presence of ACE enhanced the growth of S. obliquus and promoted the bioconcentration of Cd(2+) in S. obliquus, while the impacts of SUC were not significant. Meanwhile, EC50 values of Cd(2+) on the growth of S. obliquus increased from 0.42 mg/L to 0.54 mg/L and 0.48 mg/L with the addition of 1.0 mg/L ACE and SUC, respectively. As for Cu(2+), EC50 values increased from 0.13 mg/L to 0.17 mg/L and 0.15 mg/L with the addition of 1.0 mg/L ACE and SUC, respectively. In summary, the two ASs reduced the toxicity of the metals on the algae, with ACE showing greater effect than SUC. Although not as sensitive as the cell specific growth rate, PAM parameters could disclose the mechanisms involved in metal toxicity at subcellular levels. This study provides the first evidence for the possible impact of ASs on the ecotoxicity of heavy metals.
Swiss Albino male mice were exposed to blends of aspartame (3.5, 35, 350 mg/kg bw) and acesulfame-K (1.5, 15 and 150mg/kg bw) by gavage. Bone marrow cells isolated from femora were analyzed for chromosome aberrations. Statistical analysis of the results show that aspartame in combination with acesulfame-K is not significantly genotoxic. /Acesulfame K/
/The authors/ ... investigated the ability of zinc sulfate (5, 25, 50 mM) to inhibit the sweetness of 12 chemically diverse sweeteners, which were all intensity matched to 300 mM sucrose [800 mM glucose, 475 mM fructose, 3.25 mM aspartame, 3.5 mM saccharin, 12 mM sodium cyclamate, 14 mM acesulfame-K, 1.04 M sorbitol, 0.629 mM sucralose, 0.375 mM neohesperidin dihydrochalcone (NHDC), 1.5 mM stevioside and 0.0163 mM thaumatin]. Zinc sulfate inhibited the sweetness of most compounds in a concentration dependent manner, peaking with 80% inhibition by 50 mM. Curiously, zinc sulfate never inhibited the sweetness of Na-cyclamate. This suggests that Na-cyclamate may access a sweet taste mechanism that is different from the other sweeteners, which were inhibited uniformly (except thaumatin) at every concentration of zinc sulfate. We hypothesize that this set of compounds either accesses a single receptor or multiple receptors that are inhibited equally by zinc sulfate at each concentration.
/MILK/ Nonnutritive sweeteners (NNS), including saccharin, sucralose, aspartame, and acesulfame-potassium, are commonly consumed in the general population, and all except for saccharin are considered safe for use during pregnancy and lactation. Sucralose (Splenda) currently holds the majority of the NNS market share and is often combined with acesulfame-potassium in a wide variety of foods and beverages. To date, saccharin is the only NNS reported to be found in human breast milk after maternal consumption, while there is no apparent information on the other NNS. Breast milk samples were collected from 20 lactating volunteers, irrespective of their habitual NNS intake. Saccharin, sucralose, and acesulfame-potassium were present in 65% of participants' milk samples, whereas aspartame was not detected. These data indicate that NNS are frequently ingested by nursing infants, and thus prospective clinical studies are necessary to determine whether early NNS exposure via breast milk may have clinical implications. /Acesulfame potassium/
Single oral doses of 10 mg (14)C-Acesulfame K/kg bw given to rats and dogs were rapidly absorbed. Maximum blood levels reached were 0.75 plus or minus 0.2 g/mL in rats, 0.5 hr after dosing, and 6.56 plus or minus 2.08 g/mL in dogs, 1-1.5 hr after dosing. In rats, 82-100% of the dose, and in dogs, 85-100% of the dose was excreted in the urine; in both species, 97-100% of the total radioactivity was excreted in feces, and total recovery approximated 100%. Rats given 10 consecutive daily doses of 10 mg/kg orally did not show evidence of accumulation. Three days after dosing, the concn in the organs and plasma was 0.4 nMol/g in liver, and <0.2 nMol/g in other tissues. Seven days after dosing, the concn in dogs was <0.2 nMol/g in all tissues examined. /Acesulfame K/
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
在经过7天的预处理,喂食含有3%阿斯巴甜K的饮食后,雄性大鼠通过口服灌胃给予含有250毫克阿斯巴甜K的(14)C-阿斯巴甜K(9.6 x 10^8 dpm)。八小时后,动物被处死并切除肝脏和脾脏;从这些器官中分离出DNA和染色质蛋白。在任何一个DNA样本中都无法检测到放射性。与染色质蛋白相关的一个低活性水平(8-11 dpm/mg蛋白质)被认为是由于未改变的阿斯巴甜K的非共价相互作用。/阿斯巴甜K/
After pretreatment for seven days with a diet containing 3% Acesulfame K, male rats were given a dose of 250 mg Acesulfame K containing (14)C-Acesulfame K (9.6 x 108 dpm) by oral gavage. After eight hours the animals were killed and liver and spleen excised; DNA and chromatin protein was isolated from these organs. No radioactivity could be detected on any DNA sample. A low level of activity (8-11 dpm/mg protein) was associated with chromatin protein and this was claimed to be due to non-covalent interactions of unchanged Acesulfame K. /Acesulfame K/
Single oral doses of approximately 15 mg (14)C-Acesulfame K/kg bw were administered to male and female rats which had been pretreated with unlabeled Acesulfame K at a level of 300 mg/kg diet for 60 days. Control animals without pretreatment were also similarly dosed with (14)C-Acesulfame K. In all animals 95.1-98.2% of the dose was recovered in urine and cage washings and 0.95-2.86% in feces. Total recoveries were 96.3-99.2%. Excretion of radioactivity was rapid and displayed biphasic kinetics; 92.6-96.8% of the dose was excreted in 24 hours. ... No significant differences in route or rate of excretion were observed between sexes nor between controls and animals pretreated with Acesulfame K for 60 days. /Acesulfame K/
ACESULFAME POTASSIUM COMPOSITIONS AND PROCESSES FOR PRODUCING SAME
申请人:CELANESE INTERNATIONAL CORPORATION
公开号:US20180079735A1
公开(公告)日:2018-03-22
A process for producing acesulfame potassium, the process comprising the steps of providing a cyclizing agent composition comprising a cyclizing agent and a solvent and having an initial temperature, cooling the cyclizing agent composition to form a cooled cyclizing agent composition having a cooled temperature less than 35° C., reacting an acetoacetamide salt with the cyclizing agent in the cooled cyclizing agent composition to form a cyclic sulfur trioxide adduct composition comprising cyclic sulfur trioxide adduct; and, forming from the cyclic sulfur trioxide adduct in the cyclic sulfur trioxide adduct composition the finished acesulfame potassium composition comprising non-chlorinated acesulfame potassium and less than 39 wppm 5-chloro-acesulfame potassium. The cooled temperature is at least 2° C. less than the initial temperature.
Dicationic ionic liquids as new feeding deterrents
作者:Damian K. Kaczmarek、Kamil Czerniak、Tomasz Klejdysz
DOI:10.1007/s11696-018-0495-6
日期:2018.10
quaternary bis(ammonium) salts with alkyl-1,X-bis(dimethyldecylammonium) cation and saccharinate, acesulfamate, lactate and pyroglutamate anions were synthesized and characterized by 1H and 13C NMR spectroscopy. Thermal gravimetric and differential scanning calorimetry analyses confirmed that all salts were thermally stable and the majority of them exhibited meltingpoints below 100 °C. The physicochemical
6-Methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide and its non-toxic salts are prepared by reacting acetoacetamide with an S-O compound of the formula I FSO.sub.2 Y (I) wherein Y.dbd.F, Cl, --OSO.sub.2 F or --OSO.sub.2 Cl, preferably only F, in the presence of bases. The non-toxic salts--especially the potassium salt--are valuable synthetic sweeteners.
Adapting decarbonylation chemistry for the development of prodrugs capable of <i>in vivo</i> delivery of carbon monoxide utilizing sweeteners as carrier molecules
作者:Ladie Kimberly De La Cruz、Xiaoxiao Yang、Anna Menshikh、Maya Brewer、Wen Lu、Minjia Wang、Siming Wang、Xingyue Ji、Alyssa Cachuela、Haichun Yang、David Gallo、Chalet Tan、Leo Otterbein、Mark de Caestecker、Binghe Wang
DOI:10.1039/d1sc02711e
日期:——
using CO gas as a therapeutic agent for widespread applications, we are interested in developing COprodrugs through bioreversible caging of CO in an organic compound. Specifically, we have explored the decarboxylation–decarbonylation chemistry of 1,2-dicarbonyl compounds. Examination and optimization of factors favorable for maximal CO release under physiological conditions led to organicCO prodrugs
一氧化碳作为内源性信号分子在各种器官损伤动物模型中表现出药理功效。为了解决使用 CO 气体作为广泛应用的治疗剂的困难,我们有兴趣通过将 CO 生物可逆地封闭在有机化合物中来开发 CO 前药。具体来说,我们探索了 1,2-二羰基化合物的脱羧-脱羰化学。对生理条件下有利于最大 CO 释放的因素的检查和优化导致使用无热量甜味剂作为连接到 1,2-二羰基核心的离去基团的有机 CO 前药。连接具有适当特性的离去基团可促进所需的水解-脱羧-脱羰反应序列,从而产生 CO。选择一种这样的 CO 前药来概括 CO 在细胞培养研究中对 LPS 诱导的 TNF-α 产生的抗炎作用。小鼠口服给药可将 COHb 水平升高至各种临床前和临床研究中确定的安全有效水平。此外,其药理功效在小鼠急性肾损伤模型中得到证实。这些研究证明了这些前药与良性载体作为口服活性 CO 疗法的潜力。这是口服活性有机 CO 前药与良性载体的第一个例子,该良性载体是