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PD 123319 ditrifluoroacetate

Angiotensin AT2 receptor antagonist CAS# 136676-91-0

PD 123319 ditrifluoroacetate

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Chemical structure

PD 123319 ditrifluoroacetate

3D structure

Chemical Properties of PD 123319 ditrifluoroacetate

Cas No. 136676-91-0 SDF Download SDF
PubChem ID 6604951 Appearance Powder
Formula C35H34F6N4O7 M.Wt 736.66
Type of Compound N/A Storage Desiccate at -20°C
Solubility H2O : ≥ 36 mg/mL (48.87 mM)
*"≥" means soluble, but saturation unknown.
Chemical Name (6S)-1-[[4-(dimethylamino)-3-methylphenyl]methyl]-5-(2,2-diphenylacetyl)-6,7-dihydro-4H-imidazo[4,5-c]pyridine-6-carboxylic acid;2,2,2-trifluoroacetic acid
SMILES CC1=C(C=CC(=C1)CN2C=NC3=C2CC(N(C3)C(=O)C(C4=CC=CC=C4)C5=CC=CC=C5)C(=O)O)N(C)C.C(=O)(C(F)(F)F)O.C(=O)(C(F)(F)F)O
Standard InChIKey GPKQIEZLHVGJQH-ZXVJYWQYSA-N
Standard InChI InChI=1S/C31H32N4O3.2C2HF3O2/c1-21-16-22(14-15-26(21)33(2)3)18-34-20-32-25-19-35(28(31(37)38)17-27(25)34)30(36)29(23-10-6-4-7-11-23)24-12-8-5-9-13-24;2*3-2(4,5)1(6)7/h4-16,20,28-29H,17-19H2,1-3H3,(H,37,38);2*(H,6,7)/t28-;;/m0../s1
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 PD 123319 ditrifluoroacetate

DescriptionPD 123319 (ditrifluoroacetate) is a potent, selective AT2 angiotensin II receptor antagonist with IC50 of 34 nM.In Vitro:PD 123319 is shown to discriminate between two subclasses of AII receptors in many different tissues. 125I-AII specifically label two classes of binding sites for AII in a membrane preparation of bovine adrenal glomerulosa cells. The first class (DuP-753 sensitive) represents approximately 85% of the total binding sites for AII and possesses a high affinity (IC50 of 92.9 nM) for DuP-753. PD-123319 does not have any effect on 125I-AII binding to this site. The second class of binding sites is more sensitive to PD-123319, with an IC50 of 6.9 nM, and has a much lower affinity for DuP-753 (IC50 around 10 microM)[2].

References:
[1]. Blankley CJ, et al. Synthesis and structure-activity relationships of a novel series of non-peptide angiotensin II receptor binding inhibitors specific for the AT2 subtype. J Med Chem. 1991 Nov;34(11):3248-60. [2]. Boulay G, et al. Modulation of angiotensin II binding affinity by allosteric interaction of polyvinyl sulfate with an intracellular domain of the DuP-753-sensitive angiotensin II receptor of bovine adrenal glomerulosa. Mol Pharmacol. 1992 Apr;41(4):809-15 [3]. Estrup TM, et al. No effect of angiotensin II AT(2)-receptor antagonist PD 123319 on cerebral blood flow autoregulation. J Renin Angiotensin Aldosterone Syst. 2001 Sep;2(3):188-92. [4]. Brillante DG, et al. Effects of intravenous PD 123319 on haemodynamic and arterial stiffness indices in healthy volunteers. J Renin Angiotensin Aldosterone Syst. 2005 Sep;6(2):102-6.

PD 123319 ditrifluoroacetate Dilution Calculator

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PD 123319 ditrifluoroacetate Molarity Calculator

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Preparing Stock Solutions of PD 123319 ditrifluoroacetate

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 1.3575 mL 6.7874 mL 13.5748 mL 27.1496 mL 33.937 mL
5 mM 0.2715 mL 1.3575 mL 2.715 mL 5.4299 mL 6.7874 mL
10 mM 0.1357 mL 0.6787 mL 1.3575 mL 2.715 mL 3.3937 mL
50 mM 0.0271 mL 0.1357 mL 0.2715 mL 0.543 mL 0.6787 mL
100 mM 0.0136 mL 0.0679 mL 0.1357 mL 0.2715 mL 0.3394 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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Background on PD 123319 ditrifluoroacetate

Description: IC50 Value: 1.2 ±0.4 mM (Inhibition of adenylyl cyclase elicited by 0.1 microM Ang II) [2] PD 123319 ditrifluoroacetate is a potent, selective, non-peptide angiotensin AT2 receptor antagonist. IC50 values are 34 and 210 nM in rat adrenal tissue and brain respectively. in vitro: Neither the AT1 antagonist losartan nor the AT2 antagonist PD 123319 exhibited significant competition for [125I]angiotensin-(1-7) binding to endothelial cells isolated from bovine aorta, in agreement with the absence of detectable mRNAs encoding typical angiotensin receptor subtypes 1 or 2 (AT1 or AT2) [1]. In radioligand binding competition experiments, approximately 25% of the specific binding sites labeled by 125I-[Sar1]Ang II were inhibited by low concentrations of PD 123319 (0.1 to 10 nM), whereas the AT2 antagonist CGP 42112A was inactive at concentrations less than 0.1 microM [2]. in vivo: PD 123319 did not influence baseline CBF, but resulted in a minor BP decrease (10 control and 10 treated rats) [3]. Sixteen normal subjects aged 29.9+/-13.8 years (range 18-30 years) received an intravenous infusion of PD 123319 (10 mcg/minute for 5 minutes) and placebo, separated by one week. Haemodynamics (cardiac index, stroke index and systemic vascular resistance) were measured non-invasively using a BioZ.com thoracic impedance detection system. Blood pressure was measured from an arm cuff using oscillometry [4]. Toxicity: Losartan and PD-123319 each increased vascular renin distribution in both kidneys. Late losartan treatment had no effect on any of the parameters in either kidney, and PD-123319 had no effect on either kidney [5]. Clinical trial: N/A

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References on PD 123319 ditrifluoroacetate

No effect of angiotensin II AT(2)-receptor antagonist PD 123319 on cerebral blood flow autoregulation.[Pubmed:11881121]

J Renin Angiotensin Aldosterone Syst. 2001 Sep;2(3):188-92.

Blockade of the renin-angiotensin system with angiotensin-converting enzyme inhibitors (ACE-I) or angiotensin AT1-receptor antagonists shift the limits of autoregulation of cerebral blood flow (CBF) towards lower blood pressure (BP). The role of AT2-receptors in the regulation of the cerebral circulation is uncertain. Hence, the present study investigated the effect on CBF autoregulation of blocking of angiotensin AT2-receptors with PD 123319 in spontaneously hypertensive rats (SHR). Anaesthetised and ventilated SHR were given PD 123319, 0.36 mg/kg/min, intravenously, and compared with a control group. CBF was measured by the intracarotid 133xenon injection method and BP was raised by noradrenaline infusion and lowered by controlled haemorrhage in separate groups of rats. The limits of autoregulation were determined by computed least-sum-of-squares analysis. PD 123319 did not influence baseline CBF, but resulted in a minor BP decrease (10 control and 10 treated rats). The lower limit of CBF autoregulation (eight treated and eight control) as well as the upper limit of CBF autoregulation (eight treated and eight control) were not significantly different in PD 123319 and control animals (lower limit treated 102+/-4 mmHg and control 94+/-4; NS, and upper limit treated 171 +/- 10 mmHg and control 162+/-7; NS). These findings indicate that acute AT2-receptor blockade does not influence CBF autoregularion.

Effects of intravenous PD 123319 on haemodynamic and arterial stiffness indices in healthy volunteers.[Pubmed:16470490]

J Renin Angiotensin Aldosterone Syst. 2005 Sep;6(2):102-6.

Relatively little is known about the functional expression of cardiovascular angiotensin type 2 (AT2)-receptors in healthy young adult humans. We performed a randomised, placebo-controlled crossover study of the effects of intravenous administration of the selective AT2-receptor antagonist PD 123319 on haemodynamics and arterial stiffness in normal volunteers. Sixteen normal subjects aged 29.9+/-13.8 years (range 18-30 years) received an intravenous infusion of PD 123319 (10 mcg/minute for 5 minutes) and placebo, separated by one week. Haemodynamics (cardiac index, stroke index and systemic vascular resistance) were measured non-invasively using a BioZ.com thoracic impedance detection system. Blood pressure was measured from an arm cuff using oscillometry. Stiffness index, a measure of arterial stiffness, was measured using a Pulse Trace recorder. No significant changes in blood pressure (p=0.92), cardiac index (p=0.52), stroke index (p=0.61), systemic vascular resistance index (p=0.32) or stiffness index (p=0.57) was demonstrated following PD 123319 infusion, compared with placebo. The results of this study do not support the functional presence of cardiovascular AT2-receptors that mediate acute haemodynamic effects in healthy young adults. It remains possible that higher doses of PD 123319 may be required to demonstrate functional cardiovascular AT2-receptors in this population, if they are present.

Angiotensin III depressor action in the conscious rabbit is blocked by losartan but not PD 123319.[Pubmed:10642287]

Hypertension. 2000 Jan;35(1 Pt 1):130-4.

Vasodilator and vasodepressor properties of angiotensins have been reported, and mediation by prostaglandins or nitric oxide has been proposed. Other studies indicate that angiotensin AT(2) receptors might mediate a depressor action, and the present study was designed to delineate and explore this possibility in a conscious rabbit model. Large intravenous boluses of angiotensin III (15 nmol/kg) produced a predictable pressor peak (82+/-4 mm Hg) followed by a depressor phase (20+/-3 mm Hg), whereas equipressor doses of angiotensin II were less effective at producing depressor responses. Angiotensin-(1-7) did not exert a depressor action, and the reduced potency of angiotensin IV (relative to angiotensin III) was similar for both the pressor and depressor phases ( approximately 100-fold). It is clear that specific angiotensin IV or angiotensin-(1-7) receptors do not mediate depressor effects in this model. The AT(1) antagonist losartan (1 mg/kg) blocked both the pressor and depressor components of the angiotensin III response, whereas the AT(2) antagonist PD 123319 (35 mg/kg) had no effect on either element of the response. The data obtained with the angiotensin receptor subtype-selective compounds, losartan and PD 123319, suggest that the depressor action is an AT(1)-mediated effect and give no indication that AT(2) receptors could be involved. Paradoxically, the greater potency of angiotensin III as a vasodepressor belies the conclusion that the response is AT(1)-mediated, because AT(1) receptors have a greater affinity for angiotensin II versus angiotensin III.

Systemic and renal hemodynamic effects of the AT1 receptor antagonist, ZD 7155, and the AT2 receptor antagonist, PD 123319, in conscious lambs.[Pubmed:17051392]

Pflugers Arch. 2007 Jan;453(4):477-86.

Experiments were carried out to investigate age- and dose-dependent effects of the selective AT(1) receptor antagonist, ZD 7155, and the selective AT(2) receptor antagonist, PD 123319, on systemic and renal hemodynamics in conscious, chronically instrumented lambs aged approximately 1 and approximately 6 weeks of postnatal life. Mean arterial pressure (MAP), mean venous pressure (MVP), and renal blood flow (RBF) were measured for 10 min before and for 120 min after ZD 7155, PD 123319, or vehicle. In both age groups, administration of ZD 7155 decreased renal vascular resistance (RVR) and increased RBF within 5 min. These responses lasted less than 90 min but were not dose-dependent. MAP decreased by 30 min after administration of ZD 7155 in both age groups at doses >/=400 microg kg(-1); the remaining decreased for up to 120 min, depending upon the dose. Pressor responses to angiotensin II (ANG II) were abolished within 5 min of administration of all doses of ZD 7155, at both 1- and 6 weeks. PD 123319 had no detectable effects on systemic or renal hemodynamics or on the pressor responses to ANG II. Therefore, under physiological conditions in conscious newborn animals, ANG II modulates both resting blood pressure and RVR through activation of AT(1) but not AT(2) receptors.

Description

PD 123319 (ditrifluoroacetate) is a potent, selective AT2 angiotensin II receptor antagonist with IC50 of 34 nM.

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