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4 protocols using diprenorphine

1

Assay for Opioid Receptor Binding

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Radioligands [3H]U69,593 (49.3 Ci/mmol), [3H]diprenorphine (33.9 Ci/mmol) and [35S]GTPγS (1250 Ci/mmol) were purchased from PerkinElmer (Boston, MA, USA). Guanosine diphosphate (GDP), GTPγS, U69,593, U50,488, diprenorphine, tris(hydroxymethyl) aminomethane (Tris), 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid (HEPES), bovine serum albumin (BSA), formalin, nor-BNI and cell culture media and supplements were obtained from Sigma-Aldrich Chemicals (St. Louis, MO, USA). All other chemicals were of analytical grade and obtained from standard commercial sources. Compound A was obtained from Maybridge Chemical Co., Ltd. (Cornwall, UK) as in [50 (link)], and was prepared as 1 mM stock in 0.5% acetic acid solution and further diluted to working concentrations in the appropriate medium.
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2

Radioligand Binding and G-Protein Activation

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Cell culture media
and supplements were obtained from Sigma-Aldrich Chemicals (St. Louis,
MO) or Life Technologies (Carlsbad, CA). Radioligands [3H]DAMGO, [3H]diprenorphine, [3H]U69,593, and
[35S]GTPγS were purchased from PerkinElmer (Boston).
[3H][Ile5,6]deltorphin II was obtained from
the Institute of Isotopes Co. Ltd. (Budapest, Hungary). DAMGO, [d-Pen2,d-Pen5]enkephalin (DPDPE),
diprenorphine, U69,593, naloxone, naloxone methiodide, tris(hydroxymethyl)
aminomethane (Tris), 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic
acid (HEPES), unlabeled GTPγS, and guanosine diphosphate (GDP)
were obtained from Sigma-Aldrich Chemicals (St. Louis, MO). Morphine
hydrochloride was obtained from Gatt-Koller GmbH (Innsbruck, Austria).
All other chemicals were of analytical grade and obtained from standard
commercial sources. Test compounds were prepared as 1 mM stocks in
water and further diluted to working concentrations in the appropriate
medium.
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3

Radioligand Binding Assay for Opioid Receptors

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Cell culture
media and supplements
were obtained from Sigma-Aldrich Chemicals (St. Louis, MO) or Life
Technologies (Carlsbad, CA). Radioligands [3H][d-Ala2,N-Me-Phe4,Gly-ol5]enkephalin ([3H]DAMGO, 50 Ci/mmol), [3H]diprenorphine (37 Ci/mmol), [3H]U69,593 (39.1 Ci/mmol),
and [35S]GTPγS (1250 Ci/mmol) were purchased from
PerkinElmer (Traiskirchen, Austria). [125I]-NT (∼2200
Ci/mmol) was purchased from PerkinElmer (Billerica, MA). DAMGO, [d-Pen2,d-Pen5]enkephalin (DPDPE),
U69,593, diprenorphine, tris(hydroxymethyl)aminomethane (Tris), 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic
acid (HEPES), unlabeled GTPγS, and guanosine diphosphate (GDP)
were obtained from Sigma-Aldrich Chemicals (St. Louis, MO). PathHunter
detection reagents were obtained from DiscoverX (Birmingham, UK).
All other chemicals were of analytical grade and obtained from standard
commercial sources. Test peptides were prepared as 1 mM stocks in
water and further diluted to working concentrations in the appropriate
medium.
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4

Radioligand Binding Assay for Opioid Receptors

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Cell culture media and supplements were obtained from Sigma-Aldrich Chemicals (St. Louis, MO), or Life Technologies (Carlsbad, CA). Radioligands [3H][D-Ala2,N-Me-Phe4,Gly-ol5]enkephalin ([3H]DAMGO, 50 Ci/mmol), [3H]Diprenorphine (37 Ci/mmol), and [35S]GTPγS (1250 Ci/mmol) were purchased from PerkinElmer (Boston, MA). [3H]HS665 (30.65 Ci/mmol) was prepared by Dr. Geza Toth (Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary) as previously described49 (link). DAMGO, [D-Pen2,D-Pen5]enkephalin (DPDPE), U69,593, Diprenorphine, Tris(hydroxymethyl) aminomethane (Tris), 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid (HEPES), Hank’s Balanced Salt Solution (HBSS), unlabeled GTPγS, guanosine diphosphate (GDP) and forskolin were obtained from Sigma-Aldrich Chemicals (St. Louis, MO). Morphine hydrochloride was obtained from Gatt-Koller GmbH (Innsbruck, Austria). Compounds 1a and 2a were synthesized according to the described procedure13 (link), and 14-OMO (3) and 14-MM (4) were prepared as earlier described16 (link),50 (link). All other chemicals were of analytical grade and obtained from standard commercial sources.
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