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相关概念视频

Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Phase II Reactions: Miscellaneous Conjugation Reactions01:19

Phase II Reactions: Miscellaneous Conjugation Reactions

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Phase II biotransformations are detoxification mechanisms that conjugate xenobiotics with endogenous substances, neutralizing their toxicity.
A key example involves the conjugation of cyanide ions, which impair cellular respiration and alter hemoglobin into non-oxygen-carrying cyanmethemoglobin. To neutralize this threat, a sulfur atom from thiosulphate is transferred to the cyanide ion, catalyzed by the enzyme rhodanese, resulting in an inactive compound called thiocyanate. The production of...
87
Phase II Reactions: Sulfation and Conjugation with α-Amino Acids01:19

Phase II Reactions: Sulfation and Conjugation with α-Amino Acids

304
Sulfation and α-amino acid conjugation are two critical biotransformation reactions in drug metabolism. Sulfation, a phase II biotransformation reaction, involves adding a polar sulfate group to a drug, enhancing its water solubility and promoting excretion. This process can either co-occur with or occur independently of glucuronidation. Nonmicrosomal sulfotransferase enzymes catalyze the process. The reaction involves 3'-phosphoadenosine-5'-phosphosulfate or PAPS coenzyme...
304
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions01:20

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

1.9K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
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Formation of Complex Ions03:45

Formation of Complex Ions

23.8K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.8K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

497
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
497

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相关实验视频

Updated: Jul 27, 2025

Positron Emission Tomography Using 64-Copper as a Tracer for the Study of Copper-Related Disorders
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迪苏尔菲拉姆与Cu Cu一起使用

Wei Zhou1,2, Hua Zhang3, Lihua Huang1,2

  • 1The Fifth Affiliated Hospital (Heyuan Shenhe People's Hospital), Jinan University, Heyuan, Guangdong, China.

Theranostics
|June 7, 2023
PubMed
概括

迪苏尔菲拉姆加铜 (DSF+Cu2+) 通过减少炎症和改善肠道健康,有望预防和治疗性结肠炎 (UC). 这种组合疗法为炎症性肠病 (IBD) 提供了潜在的新疗法.

关键词:
CD4+ T 细胞是 CD4+ T 细胞.这是一种二硫胺.巨细胞是一个巨细胞.我们的微生物群.性结肠炎是一种

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科学领域:

  • 免疫学 免疫学 免疫学
  • 胃肠病学 胃肠病学
  • 药理学 药理学是指药理学的学科.

背景情况:

  • 炎症性肠道疾病 (IBD),包括性结肠炎 (UC),以慢性胃肠道炎症为特征.
  • 目前的IBD治疗面临副作用和成本的挑战,需要新的治疗方法.
  • 迪苏尔菲拉姆 (DSF) 是FDA批准的药物,具有抗炎性质,铜 (Cu2+) 可以增强这种抗炎性质.

研究的目的:

  • 在小鼠模型中研究迪苏尔菲拉姆加铜 (DSF+Cu2+) 对硫酸 (DSS) 诱导的性结肠炎 (UC) 的预防作用.
  • 阐明DSF+Cu2+在UC中调节免疫反应和肠道微生态中的潜在机制.

主要方法:

  • 利用DSS诱导的大肠炎小鼠模型和脂聚糖 (LPS) 刺激的巨细胞来评估抗炎作用.
  • 研究了DSF+Cu2+对CD4+T细胞分泌的IL-17 (IL-17) 在DSS诱导的TCRβ-/-小鼠中的影响.
  • 通过16S rRNA测序分析了肠道菌群的变化,并通过紧结蛋白表达评估了肠道屏障功能.

主要成果:

  • DSF+Cu2+显著改善了UC症状,包括体重减轻,疾病活动和结肠损伤.
  • 该疗法通过阻断NF-κB通路来抑制结肠巨细胞激活,减少NLRP3-炎症酶激活和IL-1β分泌.
  • DSF+Cu2+降低了CD4+T细胞的IL-17分泌,通过恢复密集结蛋白 (ZO-1,ocludin,MUC2) 来保护肠道屏障,并改善了肠道微生物群平衡.

结论:

  • DSF+Cu2+通过调节免疫反应和改善肠道微生物群,证明了性结肠炎的显著治疗潜力.
  • 组合疗法有效减少结肠炎症,并恢复肠道屏障的完整性.
  • DSF+Cu2+代表了一种有前途的新型治疗策略,用于治疗UC的临床应用.