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LY 266097 hydrochloride

Selective 5-HT2B receptor antagonist CAS# 172895-39-5

LY 266097 hydrochloride

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Quality Control of LY 266097 hydrochloride

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Chemical structure

LY 266097 hydrochloride

3D structure

Chemical Properties of LY 266097 hydrochloride

Cas No. 172895-39-5 SDF Download SDF
PubChem ID 9953184 Appearance Powder
Formula C21H24Cl2N2O2 M.Wt 407.33
Type of Compound N/A Storage Desiccate at -20°C
Solubility Soluble to 100 mM in DMSO and to 100 mM in ethanol
Chemical Name 1-[(2-chloro-3,4-dimethoxyphenyl)methyl]-6-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole;hydrochloride
SMILES CC1=CC2=C(C=C1)NC3=C2CCNC3CC4=C(C(=C(C=C4)OC)OC)Cl.Cl
Standard InChIKey KPXKZZURYAXZQE-UHFFFAOYSA-N
Standard InChI InChI=1S/C21H23ClN2O2.ClH/c1-12-4-6-16-15(10-12)14-8-9-23-17(20(14)24-16)11-13-5-7-18(25-2)21(26-3)19(13)22;/h4-7,10,17,23-24H,8-9,11H2,1-3H3;1H
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of LY 266097 hydrochloride

DescriptionSelective 5-HT2B receptor antagonist (pKi = 9.3). More than 100-fold selective over 5-HT2A and 5-HT2C. Attenuates amphetamine-induced locomotion in the rat.

LY 266097 hydrochloride Dilution Calculator

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Preparing Stock Solutions of LY 266097 hydrochloride

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.455 mL 12.2751 mL 24.5501 mL 49.1002 mL 61.3753 mL
5 mM 0.491 mL 2.455 mL 4.91 mL 9.82 mL 12.2751 mL
10 mM 0.2455 mL 1.2275 mL 2.455 mL 4.91 mL 6.1375 mL
50 mM 0.0491 mL 0.2455 mL 0.491 mL 0.982 mL 1.2275 mL
100 mM 0.0246 mL 0.1228 mL 0.2455 mL 0.491 mL 0.6138 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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References on LY 266097 hydrochloride

[Phase I study of gemcitabine hydrochloride (LY 188011) combination therapy with cisplatin in the patients with non-small cell lung cancer].[Pubmed:10396316]

Gan To Kagaku Ryoho. 1999 Jun;26(7):898-907.

The combination Phase I study of gemcitabine hydrochloride with cisplatin was conducted in the patients with non-small cell lung cancer (NSCLC) at 5 investigation sites. Gemcitabine was administrated on day 1, 8 and 15 and cisplatin on day 1 of each 28-day cycle. The dosage of cisplatin was fixed to 80 mg/m2 and the dosage of Gemcitabine was gradually escalated in 3 dosing level from 600, 800 to 1,000 mg/m2. The maximum tolerated dose (MTD) and the recommended dose was determined with Continual Reassessment Method. For each dose level, 6 cases, 3 cases and 6 cases were registered respectively and all 15 cases were evaluable. In the dose level 3 with 1,000 mg/m2 of gemcitabine and 80 mg/m2 of cisplatin, grade 4 neutropenia was observed as DLT in 3 out of 6 cases, thus dose level 3 was considered as MTD and the recommended dose. Major adverse events were leukopenia, neutropenia, nausea/vomiting and anorexia. The incidence of such adverse events seemed to be dose-dependent and especially the grade of neutropenia seemed to be more serious as the dose increased. Also, the grade of liver function tests abnormal seemed to be more serious as the dose increased but the incidence as well as the grade did not have tendency of dose-dependent in another events including renal function tests abnormal. On the other hand, as to the efficacy PR was observed in 4 out of 15 cases. Based upon the results, it is necessary to discuss further the efficacy in the recommended dose in the combination therapy of gemcitabine and cisplatin.

[An early phase II study of gemcitabine hydrochloride (LY 188011). Gemcitabine Cooperative Study Group for Early Phase II].[Pubmed:8937492]

Gan To Kagaku Ryoho. 1996 Nov;23(13):1813-24.

An early phase II cooperative study of Gemcitabine Hydrochloride (abbreviated to "gemcitabine" herewith) was conducted in patients with a variety of solid tumors (i.e., lung cancer, gastric cancer, pancreatic cancer, colon/rectum cancer, cervical cancer, ovarian cancer and breast cancer) at 56 institutions. The aim of the first step (Step I) was to investigate the feasibility of gemcitabine in a variety of different solid tumors, including lung cancer regarding efficacy and safety. The aim of the second step (Step II) was as a result of step I (Responses were observed) to continue to investigate the efficacy and safety of gemcitabine in chemonaive patients with non-small cell lung cancer. As a Step I study, gemcitabine was administered once weekly at a dose of 800 mg/m2 for a consecutive 3-week period followed by a week of rest, in multiple courses. Among the 29 eligible patients with lung cancer, partial response (PR) was achieved in 3 patients (25.0%, 95% confidence interval: 5.5-57.2%) out of 12 chemonaive patients. Adverse reactions (grade 3 or higher) seen in 29 patients with lung cancer were neutropenia (27.6%), leukopenia (13.8%), decreased hemoglobin (13.8%), thrombocytopenia (10.3%), malaise (6.9%), anorexia (3.4%), nausea/vomiting (3.4%), diarrhea (3.4%), dyspnea (3.4%) and interstitial pneumonia (3.4%). In other types of solid tumors, PR was achieved in 2 (8.7%) out of 23 eligible patients with cervical cancer and in 1 (5.3%) of 19 eligible patients with ovarian cancer, while the use of analgesics became unnecessary in 1 patient with pancreatic cancer. Incidence as well as severity of main adverse reactions in these patients were comparable to those seen in patients with lung cancer. A Step II study, in which gemcitabine was administered once weekly at a dose of 1,000 mg/m2 to chemonaive patients with non-small cell lung cancer, was conducted, referring to the results of Step I and clinical studies conducted overseas. The results of the Step II study demonstrated PR in 5 (14.3%, 95% confidence interval: 4.8 - 30.3%) out of 35 eligible patients with non-small cell lung cancer and that the main adverse reactions were comparable to those seen in the Step I study, posing no tolerability problems in particular.

Changes in motor activities induced by microinjections of the selective dopamine agonists LY 171555, quinpirole hydrochloride, and SK&F 38393 into the habenula nucleus.[Pubmed:3495009]

Pharmacol Biochem Behav. 1987 Mar;26(3):643-6.

The effects on behaviour of microinjections into the habenula complex of selective agonists for dopamine D-1 (SK&F 38393) and D-2 (LY 171555) receptors were documented in a holeboard, open-field test. The D-2 agonist reduced grooming responses, locomotor activity and rearing behaviour. In contrast, the D-1 agonist increased rearing and locomotor activity but was without effect on grooming responses. Neither drug produced significant effects on inspective hole exploration. The data extend findings of behavioural consequences of central D-1 receptor activation and provide direct evidence in support of the functional and behavioural importance of intrahabenular dopamine receptor sites. The findings are consistent with suggestions for feedback regulation of habenular efferents to midbrain dopaminergic neurons. Effects of both receptor agonists on some responses but not others indicates potential complex interactions between D-1 and D-2 receptors within the habenula.

The central serotonin 2B receptor: a new pharmacological target to modulate the mesoaccumbens dopaminergic pathway activity.[Pubmed:20534001]

J Neurochem. 2010 Sep 1;114(5):1323-32.

The function of the serotonin(2B) receptor (5-HT(2B)R) in the mammalian brain is poorly characterized, especially with regard to its influence on dopamine (DA) neuron activity. Here, we assessed this issue by evaluating effects of 5-HT(2B)Rs ligands in the control of striatal and accumbal DA outflow, using in vivo microdialysis in halothane-anesthetized rats, and amphetamine-induced hyperlocomotion in vigil rats. The selective 5-HT(2B)R antagonist 1-[(2-chloro-3,4-dimethoxyphenyl)methyl]-2,3,4,9-tetrahydro-6-methyl-1H-pyrido[3, 4-B]indole (LY 266097; 0.16 mg/kg, i.p.) had no influence on basal accumbal and striatal DA outflow but reduced significantly accumbal DA outflow when injected at 0.63 mg/kg. A significant reduction of basal DA outflow in the nucleus accumbens was also observed after i.p. administration of 0.16 mg/kg 2-amino-4-(4-fluoronaphth-1-yl)-6-isopropylpyrimidine, another selective 5-HT(2B)R antagonist. In contrast, the 5-HT(2B)R agonist alpha-methyl-5-(2-thienylmethoxy)-1H-indole-3-ethanamine (3 mg/kg, s.c.) had no influence on basal DA outflow in either brain region. The increase in striatal and accumbal DA outflow induced by the 5-HT(2C)R inverse agonist 5-methyl-1-(3-pyridylcarbamoyl)-1,2,3,5-tetrahydropyrrolo[2,3-f] indole (5 mg/kg, i.p.) was unaltered by LY 266097 (0.63 mg/kg) pre-treatment. Conversely, LY 266097 (0.63 mg/kg) significantly diminished the increase in DA outflow induced by haloperidol (0.01 mg/kg, s.c.) or amphetamine (0.5 mg/kg, i.p.) in the nucleus accumbens, but not in the striatum. Amphetamine-induced hyperlocomotion (1 mg/kg) was also attenuated by LY 266097 (0.63 mg/kg). These findings demonstrate that 5-HT(2B)Rs exert a facilitatory control on mesoaccumbens DA pathway activity, and suggest that they may constitute a new target for improved treatment of DA-related neuropsychiatric disorders.

Potent, selective tetrahydro-beta-carboline antagonists of the serotonin 2B (5HT2B) contractile receptor in the rat stomach fundus.[Pubmed:8709108]

J Med Chem. 1996 Jul 5;39(14):2773-80.

A series of potent, selective 5HT2B receptor antagonists has been identified based upon yohimbine, with SAR studies resulting in a 1000-fold increase in 5HT2B receptor affinity relative to the starting structure (-log KBS > 10.0 have been obtained). These high-affinity tetrahydro-beta-carboline antagonists are able to discriminate among the 5HT2 family of serotonin receptors, with members of the series showing selectivities of more than 100-fold versus both the 5HT2A and 5HT2C receptors based upon radioligand binding and functional assays. As the first compounds reported with such selectivity and enhanced receptor affinity, these tetrahydro-beta-carboline antagonists are useful tools for elucidating the role of serotonin acting at the 5HT2B receptor in normal and disease physiology.

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