G'Day All
<4tpkik$nqh at selene.rz.uni-duesseldorf.de> bernd rupp
<rupp at pharm.uni-duesseldorf.de> writes:>From: bernd rupp
<rupp at pharm.uni-duesseldorf.de>>Subject: I1 imidazoline receptor agonists
>Date: 1 Aug 1996 06:58:28 GMT
>I need biologycal and physical datas about selective I1 imidazoline receptor
>agonists.
>Greatly appreciate any help.
There are currently two candidates for relatively selective I1 receptor
"agonists", moxonidine and rilmenidine. There are a few problems though.
Firstly, the notion of what is an imidazoline agonist is problematical. A
compound is said to be an "agonist" if it produces hypotension when injected
into the RVLM. It is still not clear if this is actually an agonist action.
Secondly the actual affinities of these compounds for I2-sites and
alpha2-adrenoceptors vary between groups (moxonidine has been variously
described as 70 times more selective for I1 sites than for alpha2 to having
no affinity for I1 sites at all). You would be well advised to check the
affinity in your test system first. There is a new compoune AGN 192403 (Munk
et al 1996), with high affinity for I1 binding sites, which is neither an
antagonist nor an agonist for blood pressure responses.
The following references will get you started.
Bricca, G, Dontenwill, M, Molines, A, Feldman, J, Tibirica, E, Belcourt, A,
and Bousquet, P (1989) Eur J Pharmacol 163 373-7Bricca, G, Zhang, J, Greney,
H, Dontenwill, M, Stutzmann, J, Belcourt, A, and Bousquet, P (1993) Br J
Pharmacol 110 1537-43Campbell, WR, and Potter, DE (1995) Ann N Y Acad Sci 763
463-85Coupry, I, Lachaud, V, Podevin, RA, Koenig, E, and Parini, A (1989) Am J
Hypertens 2 468-70Ernsberger, P, Haxhiu, MA, Graff, LM, Collins, LA, Dreshaj,
I, Grove, DL, and Graves, ME (1994) Cardiovasc Drugs Ther 8 Su pl 1 p27-41
King, PR, Suzuki, S, Louis, WJ, and Gundlach, AL (1995) Ann N Y Acad Sci 763
194-207
Regunathan, S, Bramwell, S, and Reis, DJ (1995) Ann N Y Acad Sci 763 290-4
Munk et al., (1996) J Medicinal Chem 39 1193-5
---------------------------------------------
Ian Musgrave Ph.D, Prince Henry's Institute of Medical Research
PO Box 5152, Clayton 3168, Australia.
Phone +61 3 550 4286 FAX +61 3 550 6125
Lab: Ian.Musgrave at med.monash.edu.au <http://www.mmcc.monash.edu.au/~ian-mu/>
Private: Reynella at werple.mira.net.au <http://werple.mira.net.au/~reynella/>
