Isosulfan blue is a synthetic dye that has been used for various purposes, including medical, environmental, and industrial applications. It is a water-soluble compound that belongs to the family of sulfonated phthalocyanine dyes. Isosulfan blue is also known as Lymphazurin, Patent Blue V, or Sulpho Cyanine 10.
P-4125;P-1888;Lymphazurin;Isosulfan Blue;Disulphin blau;2,5-Disulfophenyl isomer;PATENT BLUE VIOLET F & D VERSION;PATENT BLUE V (V F) (C.I. no 42045 );2-{[4-(Diethylamino)phenyl][4-(diethyliminio)-2,5-cyclohexadien-1-ylidene]methyl}-1,4-benzenedisulfonate;sodium,2-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]benzene-1,4-disulfonate
Isosulfan blue can be synthesized by several methods, including the reaction of phthalic anhydride with urea and sulfuric acid, the reaction of phthalic acid with urea and sulfuric acid, and the reaction of phthalic acid with urea and sodium bisulfite. The efficiency and yield of each method vary depending on the reaction conditions, such as temperature, pressure, and reaction time. The most commonly used method is the reaction of phthalic anhydride with urea and sulfuric acid, which yields isosulfan blue with a purity of over 95%. However, this method requires high temperature and pressure, which can be hazardous and energy-intensive. Environmental and safety considerations should be taken into account when synthesizing isosulfan blue, as the reaction byproducts can be toxic and harmful to the environment.
Chemical Structure and Biological Activity
The chemical structure of isosulfan blue consists of a phthalocyanine core with four sulfonate groups attached to the peripheral positions. Isosulfan blue has a molecular weight of 961.06 g/mol and a molecular formula of C37H27N3Na2O9S3. Isosulfan blue has been shown to have biological activity, particularly in the field of medical research. It is used as a diagnostic tool for lymphatic mapping and sentinel lymph node biopsy in breast cancer and melanoma patients. Isosulfan blue binds to albumin and is transported through the lymphatic system, allowing for the identification of the sentinel lymph node. Isosulfan blue has also been investigated for its potential use in photodynamic therapy, which involves the activation of a photosensitizer by light to induce cell death.
Biological Effects
Isosulfan blue has been shown to have effects on cell function and signal transduction. It has been reported to inhibit the activity of protein kinase C, which is involved in cell proliferation and differentiation. Isosulfan blue has also been shown to induce apoptosis, or programmed cell death, in cancer cells. However, isosulfan blue can have potential therapeutic and toxic effects, depending on the dose and route of administration. In clinical trials, isosulfan blue has been shown to be safe and effective for lymphatic mapping and sentinel lymph node biopsy. However, rare cases of anaphylaxis and allergic reactions have been reported.
Applications
Isosulfan blue has various applications in medical, environmental, and industrial research. In medical research, isosulfan blue is used for lymphatic mapping and sentinel lymph node biopsy in breast cancer and melanoma patients. It is also being investigated for its potential use in photodynamic therapy for cancer treatment. In environmental research, isosulfan blue is used as a tracer dye to study water flow and pollution in rivers and lakes. It can also be used to monitor the effectiveness of wastewater treatment plants. In industrial research, isosulfan blue is used in the manufacturing of textiles, paper, and plastics. It can also be used to improve product quality and efficiency in various industries. Health and safety considerations should be taken into account when using isosulfan blue, as it can be toxic and harmful to the environment.
Future Perspectives and Challenges
The use and study of isosulfan blue face several limitations and challenges. One of the main challenges is the potential for toxicity and adverse effects, particularly in high doses or prolonged exposure. Another challenge is the limited availability and high cost of isosulfan blue, which can limit its use in research and clinical settings. Future research should focus on developing safer and more efficient methods of synthesis or extraction, as well as investigating the potential therapeutic and toxic effects of isosulfan blue. Possible solutions and improvements include the development of new formulations and delivery methods, as well as the use of alternative dyes with similar properties. Future trends and prospects in the application of isosulfan blue in scientific research include the development of new diagnostic and therapeutic tools for cancer treatment, as well as the use of isosulfan blue as a tracer dye for environmental monitoring and pollution management. Conclusion: Isosulfan blue is a synthetic dye that has various applications in medical, environmental, and industrial research. It has a complex chemical structure and biological activity, which make it a valuable tool for lymphatic mapping, sentinel lymph node biopsy, and photodynamic therapy. However, isosulfan blue can have potential therapeutic and toxic effects, depending on the dose and route of administration. Health and safety considerations should be taken into account when using isosulfan blue, as it can be toxic and harmful to the environment. Future research should focus on developing safer and more efficient methods of synthesis or extraction, as well as investigating the potential therapeutic and toxic effects of isosulfan blue.
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KT 1 decreased aortic pressure, renal blood flow, left ventricular enddiastolic pressure and resistances of total peripheral, vertebral, coronary and renal vasculatures and increased aortic blood flow, vertebral blood flow, coronary blood flow, peak positive left ventricular dP/dt and heart rate in anesthetized open-chest dogs.
KT185 is an orally bioavailable inhibitor of α/β-hydrolase domain-containing protein 6 (ABHD6) with an IC50 value of 0.21 nM in a competitive activity-based protein profiling assay using Neuro2A membranes. It inhibits ABHD6 in a 2-arachidonoyl glycerol (2-AG;) hydrolysis assay (IC50 = 13.6 nM for the mouse recombinant enzyme expressed in HEK293T cells). KT185 is selective for ABHD6 over diacylglycerol lipase β (DAGLβ) at 1 µM but inhibits lysophospholipase 1 (LYPLA1) and LYPLA2 at 10 µM. It inhibits ABHD6 activity in mouse liver and brain in vivo when administered at doses of 5-10 and approximately 40 mg/kg, respectively, without inhibiting fatty acid amide hydrolase (FAAH) in the brain. KT185 inhibits increases in the frequency of spontaneous inhibitory post-synaptic currents (sIPSCs) induced by nicotine in the rat ventral tegmental area (VTA) but does not reduce nicotine self-administration in rats when administered intracerebroventricularly at a dose of 200 µg. It has been used as a negative control for the off-target effect of the DAGL inhibitor KT172 on ABHD6. KT185 is the first orally-active ABHD6-selective inhibitor. It displays excellent selectivity against other brain and liver serine hydrolases in vivo.
KT172 is a non-selective inhibitor of diacylglycerol lipase α (DAGLα) and DAGLβ.1 It inhibits DAGL-mediated hydrolysis of 1-stearoyl-2-arachidonoylglycerol in HEK293T cell membranes expressing recombinant DAGLα or DAGLβ (IC50s = 140 and 60 nM, respectively). KT172 also inhibits α/β-hydrolase 6 (ABHD6; IC50 = 5 nM) and weakly inhibits monoacylglycerol lipase (MAGL; IC50 = 5,000 nM) in a panel of 47 mouse serine hydrolases. It restores nicotine-stimulated GABA release in isolated ventral tegmental area (VTA) dopamine neurons from rats chronically exposed to nicotine when used at a concentration of 1 µM. KT172 decreases production of 2-arachidonoyl glycerol and subsequently reduces arachidonic acid, prostaglandin E2 (PGE2;), and PGD2 in thioglycolate-stimulated peritoneal macrophages when administered at a dose of 5 mg/kg in mice. KT172 is a non-selective inhibitor of diacylglycerol lipase α (DAGLα) and DAGLβ. It inhibits DAGL-mediated hydrolysis of 1-stearoyl-2-arachidonoylglycerol in HEK293T cell membranes expressing recombinant DAGLα or DAGLβ. KT172 also inhibits α/β-hydrolase 6 (ABHD6) and weakly inhibits monoacylglycerol lipase (MAGL). It restores nicotine-stimulated GABA release in isolated ventral tegmental area (VTA) dopamine neurons from rats chronically exposed to nicotine. KT172 decreases production of 2-arachidonoyl glycerol and subsequently reduces arachidonic acid, prostaglandin E2 (PGE2), and PGD2 in thioglycolate-stimulated peritoneal macrophages.
In humans, two forms of diacylglycerol lipase, DAGLα and DAGLβ, generate the endocannabinoid 2-arachidonoyl glycerol (2-AG;) by attacking DAG at the sn-1 position. KT109 is a selective inhibitor of DAGLβ with an IC50 value of 42 nM. It demonstrates ~60-fold selectivity for DAGLβ over DAGLα, and negligible activity against other key enzymes involved in endocannabinoid signaling, including FAAH, MAGL, and ABHD11.1 KT109 has been shown to disrupt the lipid network involved in macrophage inflammatory responses, lowering 2-AG, as well as arachidonic acid and eicosanoids, in mouse peritoneal macrophages. KT109 is a selective inhibitor of DAGLβ with an IC50 value of 42 nM. DAGL-β (-/-) mice or KT109-treated wild-type mice displayed reductions in LPS-induced allodynia. Repeated KT109 administration prevented the expression of LPS-induced allodynia, without evidence of tolerance. Intraplantar injection of KT109 into the LPS-treated paw, but not the contralateral paw, reversed the allodynic responses. KT109 also reversed allodynia in the CCI and CINP models and lacked discernible side effects (e.g. gross motor deficits, anxiogenic behaviour or gastric ulcers).
KT5720 is a potent and selective inhibitor of protein kinase A (PKA) that has been widely used in scientific research. It was first synthesized in 1990 by Kase et al. and has since been used to study the role of PKA in various biological processes.
Potent, selective, reversible inhibitor of Protein Kinase G (PKG) (Ki = 234 nM). Derivative of K252, selective over PKA and PKC (Ki values are >10 and 4 μM, respectively). Prevents increased phosphorylation of regulators of G-protein-signalling in vivo. The activity of cGMP-dependent protein kinase (PKG) is controlled by factors that elevate cellular cGMP, like nitric oxide (NO), and by those that reduce cGMP levels, like certain phosphodiesterases. KT 5823 is a potent, selective inhibitor of cGMP-dependent protein kinase (PKG) (in vitro IC50 = 234 nM). KT 5823 is cell-permeable and is often used in intact cells to assess the role of PKG in signaling, although there are cases where it poorly inhibits PKG in cells. KT 5823 is a weak inhibitor of PKC (Ki = 4 µM) and PKA (Ki >10 µM). KT 5823 is a protein kinase inhibitor shown to increase TSH-induced NIS expression, and thus iodide uptake, in thyroid cells. KT 5823 is an organic heterooctacyclic compound that is 1H,1'H-2,2'-biindole in which the nitrogens have undergone formal oxidative coupling to positions 2 and 5 of methyl (3R)-3-methoxy-2-methyltetrahydrofuran-3-carboxylate (the 2S,3R,5R product), and in which the 3 and 3' positions of the biindole moiety have also undergone formal oxidative coupling to positions 3 and 4 of 1-methyl-1,5-dihydro-2H-pyrrol-2-one. It has a role as an EC 2.7. 1.12 (cGMP-dependent protein kinase) inhibitor. It is a gamma-lactam, an organic heterooctacyclic compound, a methyl ester, a hemiaminal and an indolocarbazole.
KT 5926 is an organic heterooctacyclic compound that is 5-propoxy-1H,1'H-2,2'-biindole in which the nitrogens have undergone formal oxidative coupling to positions 2 and 5 of methyl (3R)-3-hydroxy-2-methyltetrahydrofuran-3-carboxylate (the 2S,3R,5R product), and in which the 3 and 3' positions of the biindole moiety have also undergone formal oxidative coupling to positions 3 and 4 of 1,5-dihydro-2H-pyrrol-2-one. It has a role as an EC 2.7.11.18 (myosin-light-chain kinase) inhibitor. It is a gamma-lactam, an organic heterooctacyclic compound, a methyl ester, a hemiaminal, a tertiary alcohol and an indolocarbazole.