A diclofenac suppository-nabumetone combination therapy for arthritic pain relief and a monitoring method for the diclofenac binding capacity of HSA site II in rheumatoid arthritis

ABSTRACT Diclofenac suppository, a non‐steroidal anti‐inflammatory drug (NSAID), is used widely in rheumatoid arthritis (RA) patients with severe arthritic pain. As the binding percentage of diclofenac to serum proteins is high, its free (unbound) concentration after rectal administration is low. To...

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Veröffentlicht in:Biopharmaceutics & drug disposition 2013-03, Vol.34 (2), p.125-136
Hauptverfasser: Setoguchi, Nao, Takamura, Norito, Fujita, Ken-ichi, Ogata, Kenji, Tokunaga, Jin, Nishio, Toyotaka, Chosa, Etsuo, Arimori, Kazuhiko, Kawai, Keiichi, Yamamoto, Ryuichi
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container_issue 2
container_start_page 125
container_title Biopharmaceutics & drug disposition
container_volume 34
creator Setoguchi, Nao
Takamura, Norito
Fujita, Ken-ichi
Ogata, Kenji
Tokunaga, Jin
Nishio, Toyotaka
Chosa, Etsuo
Arimori, Kazuhiko
Kawai, Keiichi
Yamamoto, Ryuichi
description ABSTRACT Diclofenac suppository, a non‐steroidal anti‐inflammatory drug (NSAID), is used widely in rheumatoid arthritis (RA) patients with severe arthritic pain. As the binding percentage of diclofenac to serum proteins is high, its free (unbound) concentration after rectal administration is low. To increase temporarily the free concentration of diclofenac and to enhance its analgesic effect by inhibiting the protein binding of diclofenac, the analgesic effect of diclofenac was examined before and after the start of an inhibitor administration to RA patients with insufficient control of arthritic pain, and the protein binding capacity of diclofenac was evaluated. Binding experiments were performed by ultrafiltration, and arthritic pain was recorded by the face scale. Free fractions of diazepam and diclofenac were augmented by increasing 6‐methoxy‐2‐naphthylacetic acid (6‐MNA; the active metabolite of the NSAID nabumetone) concentrations. The free fraction of diazepam increased after the start of nabumetone administration to RA patients, and arthritic pain relief was observed. These results suggest that 6‐MNA has an inhibitory effect on the protein binding of diclofenac and the free fraction of diazepam can be used to evaluate the binding capacity of diclofenac. It is considered that diclofenac suppository–nabumetone combination therapy and the method for protein binding monitoring by diazepam can positively benefit RA patients with insufficient control of arthritic pain. Copyright © 2013 John Wiley & Sons, Ltd.
doi_str_mv 10.1002/bdd.1829
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As the binding percentage of diclofenac to serum proteins is high, its free (unbound) concentration after rectal administration is low. To increase temporarily the free concentration of diclofenac and to enhance its analgesic effect by inhibiting the protein binding of diclofenac, the analgesic effect of diclofenac was examined before and after the start of an inhibitor administration to RA patients with insufficient control of arthritic pain, and the protein binding capacity of diclofenac was evaluated. Binding experiments were performed by ultrafiltration, and arthritic pain was recorded by the face scale. Free fractions of diazepam and diclofenac were augmented by increasing 6‐methoxy‐2‐naphthylacetic acid (6‐MNA; the active metabolite of the NSAID nabumetone) concentrations. The free fraction of diazepam increased after the start of nabumetone administration to RA patients, and arthritic pain relief was observed. These results suggest that 6‐MNA has an inhibitory effect on the protein binding of diclofenac and the free fraction of diazepam can be used to evaluate the binding capacity of diclofenac. It is considered that diclofenac suppository–nabumetone combination therapy and the method for protein binding monitoring by diazepam can positively benefit RA patients with insufficient control of arthritic pain. 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Drug Dispos</addtitle><description>ABSTRACT Diclofenac suppository, a non‐steroidal anti‐inflammatory drug (NSAID), is used widely in rheumatoid arthritis (RA) patients with severe arthritic pain. As the binding percentage of diclofenac to serum proteins is high, its free (unbound) concentration after rectal administration is low. To increase temporarily the free concentration of diclofenac and to enhance its analgesic effect by inhibiting the protein binding of diclofenac, the analgesic effect of diclofenac was examined before and after the start of an inhibitor administration to RA patients with insufficient control of arthritic pain, and the protein binding capacity of diclofenac was evaluated. Binding experiments were performed by ultrafiltration, and arthritic pain was recorded by the face scale. Free fractions of diazepam and diclofenac were augmented by increasing 6‐methoxy‐2‐naphthylacetic acid (6‐MNA; the active metabolite of the NSAID nabumetone) concentrations. The free fraction of diazepam increased after the start of nabumetone administration to RA patients, and arthritic pain relief was observed. These results suggest that 6‐MNA has an inhibitory effect on the protein binding of diclofenac and the free fraction of diazepam can be used to evaluate the binding capacity of diclofenac. It is considered that diclofenac suppository–nabumetone combination therapy and the method for protein binding monitoring by diazepam can positively benefit RA patients with insufficient control of arthritic pain. Copyright © 2013 John Wiley &amp; Sons, Ltd.</description><subject>Aged</subject><subject>Arthritis, Rheumatoid - drug therapy</subject><subject>Arthritis, Rheumatoid - metabolism</subject><subject>Binding Sites</subject><subject>Biological and medical sciences</subject><subject>Butanones - administration &amp; dosage</subject><subject>Butanones - blood</subject><subject>Butanones - pharmacokinetics</subject><subject>Cyclooxygenase Inhibitors - administration &amp; dosage</subject><subject>Cyclooxygenase Inhibitors - blood</subject><subject>Cyclooxygenase Inhibitors - pharmacokinetics</subject><subject>diclofenac</subject><subject>Diclofenac - administration &amp; dosage</subject><subject>Diclofenac - blood</subject><subject>Diclofenac - pharmacokinetics</subject><subject>Diseases of the osteoarticular system</subject><subject>Drug Monitoring</subject><subject>Drug Therapy, Combination</subject><subject>Female</subject><subject>human serum albumin</subject><subject>Humans</subject><subject>Inflammatory joint diseases</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>nabumetone</subject><subject>Pain - drug therapy</subject><subject>Pain - metabolism</subject><subject>Pharmacology. 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Drug Dispos</addtitle><date>2013-03</date><risdate>2013</risdate><volume>34</volume><issue>2</issue><spage>125</spage><epage>136</epage><pages>125-136</pages><issn>0142-2782</issn><eissn>1099-081X</eissn><coden>BDDID8</coden><abstract>ABSTRACT Diclofenac suppository, a non‐steroidal anti‐inflammatory drug (NSAID), is used widely in rheumatoid arthritis (RA) patients with severe arthritic pain. As the binding percentage of diclofenac to serum proteins is high, its free (unbound) concentration after rectal administration is low. To increase temporarily the free concentration of diclofenac and to enhance its analgesic effect by inhibiting the protein binding of diclofenac, the analgesic effect of diclofenac was examined before and after the start of an inhibitor administration to RA patients with insufficient control of arthritic pain, and the protein binding capacity of diclofenac was evaluated. Binding experiments were performed by ultrafiltration, and arthritic pain was recorded by the face scale. Free fractions of diazepam and diclofenac were augmented by increasing 6‐methoxy‐2‐naphthylacetic acid (6‐MNA; the active metabolite of the NSAID nabumetone) concentrations. The free fraction of diazepam increased after the start of nabumetone administration to RA patients, and arthritic pain relief was observed. These results suggest that 6‐MNA has an inhibitory effect on the protein binding of diclofenac and the free fraction of diazepam can be used to evaluate the binding capacity of diclofenac. It is considered that diclofenac suppository–nabumetone combination therapy and the method for protein binding monitoring by diazepam can positively benefit RA patients with insufficient control of arthritic pain. Copyright © 2013 John Wiley &amp; Sons, Ltd.</abstract><cop>Chichester</cop><pub>Blackwell Publishing Ltd</pub><pmid>23225308</pmid><doi>10.1002/bdd.1829</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record>
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ispartof Biopharmaceutics & drug disposition, 2013-03, Vol.34 (2), p.125-136
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source Wiley Online Library Core Title; MEDLINE
subjects Aged
Arthritis, Rheumatoid - drug therapy
Arthritis, Rheumatoid - metabolism
Binding Sites
Biological and medical sciences
Butanones - administration & dosage
Butanones - blood
Butanones - pharmacokinetics
Cyclooxygenase Inhibitors - administration & dosage
Cyclooxygenase Inhibitors - blood
Cyclooxygenase Inhibitors - pharmacokinetics
diclofenac
Diclofenac - administration & dosage
Diclofenac - blood
Diclofenac - pharmacokinetics
Diseases of the osteoarticular system
Drug Monitoring
Drug Therapy, Combination
Female
human serum albumin
Humans
Inflammatory joint diseases
Male
Medical sciences
Middle Aged
nabumetone
Pain - drug therapy
Pain - metabolism
Pharmacology. Drug treatments
Protein Binding
protein binding inhibition
rheumatoid arthritis
Serum Albumin - metabolism
Suppositories
title A diclofenac suppository-nabumetone combination therapy for arthritic pain relief and a monitoring method for the diclofenac binding capacity of HSA site II in rheumatoid arthritis
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