Celecoxib

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Celecoxib
Celecoxib2DACS.svg
Celecoxib3Dan.gif
Systematic (IUPAC) name
4-[5-(4-Methylphenyl)-3-(trifluoromethyl)pyrazol-1-yl]benzenesulfonamide
Clinical data
Trade names Celebrex
AHFS/Drugs.com monograph
MedlinePlus a699022
Licence data US FDA:link
Pregnancy cat.
Legal status
Routes Oral
Pharmacokinetic data
Bioavailability Unknown[1]
Protein binding 97% (mainly to serum albumin)[1]
Metabolism Hepatic (mainly CYP2C9)[1]
Half-life 7.8 hours; 11 hours (mild hepatic impairment); 13 hours (moderate-severe hepatic impairment)[1]
Excretion Faeces (57%), urine (27%)[1]
Identifiers
CAS number 169590-42-5 YesY
ATC code L01XX33 M01AH01
PubChem CID 2662
DrugBank DB00482
ChemSpider 2562 YesY
UNII JCX84Q7J1L YesY
KEGG D00567 YesY
ChEBI CHEBI:41423 YesY
ChEMBL CHEMBL118 YesY
PDB ligand ID CEL (PDBe, RCSB PDB)
Chemical data
Formula C17H14F3N3O2S 
Mol. mass 381.373 g/mol
 YesY (what is this?)  (verify)

Celecoxib INN (/sɛlɨˈkɒksɪb/ SE-lə-KOK-sib) is a COX-2 selective nonsteroidal anti-inflammatory drug (NSAID). It is used to treat the signs and symptoms of osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, acute pain in adults, painful menstruation, and juvenile rheumatoid arthritis in patients two years or older.[2]

Side effects include a 37% increase in incidence of major vascular events, which include nonfatal myocardial infarction, nonfatal stroke, or death from a blood vessel-related cause.[3] Additionally, an 81% increase in incidence of upper gastrointestinal complications occurs, which include perforations, obstructions, or gastrointestinal bleeding as in all NSAIDs.[3]

It is marketed by Pfizer under the brand names Celebrex and Celebra for arthritis and Onsenal for polyps. Celecoxib is available by prescription in capsule form.

Medical uses[edit]

Celecoxib is used for osteoarthritis, rheumatoid arthritis, acute pain, painful menstruation, ankylosing spondylitis, and to reduce the number of colon and rectal polyps in people with familial adenomatous polyposis.[2] It may also be used in children with juvenile rheumatoid arthritis who are older than two years of age and weigh more than 10 kg (22 lb).[2]

For postoperative pain, it is more or less equal to ibuprofen.[4] For pain relief, it is similar to paracetamol (acetaminophen).[5] And in osteoarthritis acetaminophen is the first line treatment for OA.[6][7]

It was originally intended to relieve pain while minimizing the gastrointestinal adverse effects seen with conventional NSAIDs. In practice, its primary use is in people who need regular and long-term pain relief; probably, no advantage exists to using celecoxib for short-term or acute pain relief over conventional NSAIDs, except in the situation where nonselective NSAIDs or aspirin cause cutaneous reactions (urticaria or "hives").[citation needed]

Mental illness[edit]

Tentative evidence indicates its use in treating a number of psychiatric disorders, including major depression, bipolar disorder, and schizophrenia.[8][9][10][11][12]

Familial adenomatous polyposis[edit]

It has been used to reduce colon and rectal polyps in people with familial adenomatous polyposis, but it is not known if it decreases rates of cancer,[13] so it is not a good choice for this reason.[13]

Adverse effects[edit]

  • Cardiovascular events: NSAIDs are associated with an increased risk of serious (and potentially fatal) adverse cardiovascular thrombotic events, including myocardial infarction and stroke. Risk may be increased with duration of use or pre-existing cardiovascular risk factors or disease.Individual cardiovascular risk profiles should be evaluated prior to prescribing. New-onset hypertension or exacerbation of hypertension may occur (NSAIDs may impair response to thiazide or loop diuretics), and may contribute to cardiovascular events; monitor blood pressure and use with caution in patients with hypertension. May cause sodium and fluid retention, use with caution in patients with edema or heart failure. Long-term cardiovascular risk in children has not been evaluated. Use the lowest effective dose for the shortest duration of time, consistent with individual patient goals, to reduce risk of cardiovascular events; alternate therapies should be considered for patients at high risk.[14]
  • Gastrointestinal events: NSAIDs may increase risk of serious gastrointestinal (GI) ulceration, bleeding, and perforation (may be fatal). These events may occur at any time during therapy and without warning. Use caution with a history of GI disease (bleeding or ulcers), concurrent therapy with aspirin, anticoagulants and/or corticosteroids, smoking, use of alcohol, the elderly or debilitated patients. Use the lowest effective dose for the shortest duration of time, consistent with individual patient goals, to reduce risk of GI adverse events; alternate therapies should be considered for patients at high risk. When used concomitantly with ≤325 mg of aspirin, a substantial increase in the risk of gastrointestinal complications (e.g., ulcer) occurs; concomitant gastroprotective therapy (e.g., proton pump inhibitors) is recommended.[2]
  • Hematologic effects: Anemia may occur; monitor hemoglobin or hematocrit in people on long-term treatment. Celecoxib does not usually affect PT, PTT or platelet counts; it does not inhibit platelet aggregation at approved doses.

People with prior history of ulcer disease or GI bleeding require special precaution. Moderate to severe hepatic impairment or GI toxicity can occur with or without warning symptoms in people treated with NSAIDs.

Allergy[edit]

Celecoxib contains a sulfonamide moiety and may cause allergic reactions in those allergic to other sulfonamide-containing drugs. This is in addition to the contraindication in people with severe allergies to other NSAIDs. However, it has a low (reportedly 4%) chance of inducing cutaneous reactions among persons who have a history of such reactions to aspirin or nonselective NSAIDs. NSAIDs may cause serious skin adverse events, including exfoliative dermatitis, Stevens-Johnson syndrome, and toxic epidermal necrolysis; events may occur without warning and in patients without prior known sulfa allergy. Use should be discontinued at first sign of rash (or any other hypersensitivity).

Heart attack and stroke[edit]

The coxibs (which includes celecoxib) increase the risk of major cardiovascular problems by about 37%.[3] Naproxen does not significantly increases major vascular events.[3]

The COX-2 inhibitor rofecoxib (Vioxx) was removed from the market in 2004 due to its risk. Like all NSAIDs on the US market, celecoxib carries an FDA-mandated "black box warning" for cardiovascular and gastrointestinal risk. In February 2007, the American Heart Association warned that with respect to "patients with a prior history of or at high risk for cardiovascular disease... use of COX-2 inhibitors for pain relief should be limited to patients for whom there are no appropriate alternatives, and then, only in the lowest dose and for the shortest duration necessary."[15]

Cardiovascular effects of COX-2 inhibitors differ, depending on the drug.[16] Other COX-2-selective inhibitors, such as rofecoxib, have significantly higher myocardial infarction rates than celecoxib.[17] In April 2005, after an extensive review of data, the FDA concluded it was likely "that there is a 'class effect' for increased CV risk for all NSAIDs".[18] In a 2006 meta-analysis of randomized control studies, the cerebrovascular events associated with COX-2 inhibitors were examined, but no significant risks were found when compared to nonselective NSAIDs or placebos.[19]

Drug interactions[edit]

Celecoxib is predominantly metabolized by cytochrome P450 2C9. Caution must be exercised with concomitant use of 2C9 inhibitors, such as fluconazole, which can greatly elevate celecoxib serum levels.[2] If used concomitantly with lithium, celecoxib increases lithium plasma levels.[2] If used concomitantly with warfarin, celecoxib may result in increased risk of bleeding complications.[2] The drug may increase the risk of renal failure with angiotensin-converting enzyme-inhibitors, such as lisinopril, and diuretics, such as hydrochlorothiazide.[20]

Pregnancy[edit]

In the US FDA's pregnancy categories, the drug is category C prior to 30 weeks gestation, and category D starting at 30 weeks gestation.[20]

Mechanism of action[edit]

Anti-inflammatory[edit]

A highly selective inhibitor of the COX-2 isoform of cyclooxygenase, celecoxib inhibits the transformation of arachidonic acid to prostaglandin precursors. Therefore, it has antipyretic, analgesic and anti-inflammatory properties.[2] Nonselective NSAIDs (such as aspirin, naproxen, and ibuprofen) inhibit both COX-1 and COX-2. Inhibition of COX-1 (which celecoxib does not inhibit at therapeutic concentrations) inhibits the production of prostaglandins and the production of thromboxane A2, a platelet activator.[2] COX-1 is traditionally defined as a constitutively expressed "housekeeping" enzyme and plays a role in the protection of the gastrointestinal mucosa, renal hemodynamics, and platelet thrombogenesis.[21][22] COX-2, on the contrary, is extensively expressed in cells involved in inflammation and is upregulated by bacterial lipopolysaccharides, cytokines, growth factors, and tumor promoters.[21][23] Celecoxib is approximately 10-20 times more selective for COX-2 inhibition over COX-1.[22][24] It binds with its polar sulfonamide side chain to a hydrophilic side pocket region close to the active COX-2 binding site.[25] In theory, this selectivity allows celecoxib and other COX-2 inhibitors to reduce inflammation (and pain) while minimizing gastrointestinal adverse drug reactions (e.g. stomach ulcers) that are common with nonselective NSAIDs.[26]

Anti-cancer[edit]

For its use in reducing colon polyps, celecoxib affects genes and pathways involved in inflammation and malignant transformation in tumors, but not normal tissues.[27]

Celecoxib binds to Cadherin-11 (which may explain the reduction in cancer progression).[28]

Medicinal chemistry[edit]

Synthesis[edit]

The synthesis of celecoxib was first described in 1997 by researchers at Searle Research and Development. It is synthesized by a Claisen condensation reaction of an acetophenone with N-(trifluoroacetyl)imidazole catalyzed by the strong base, sodium bis(trimethylsilyl)amide to produce a 1,3-dicarbonyl adduct.[29] Condensation of the diketone with (4-sulfamoylaphenyl)hydrazine produces the 1,5-diarylpyrazole drug moiety.

Synthesis of celecoxib.gif

Structure-activity relationship[edit]

Monosubstituted 1,5-diarylpyrazoles.jpg
Enzyme data for monosubstituted 5-aryl analogs.jpg
Enzyme data for 4-substituted analogs.jpg
In vitro cox-I and cox-II enzyme data for disubstituted 5-aryl analogs.jpg

The Searle research group found the two appropriately substituted aromatic rings must reside on adjacent positions about the central ring for adequate COX-2 inhibition. Various modifications can be made to the 1,5-diarylpyrazole moiety to deduce the structure-activity relationship of celecoxib.[29] A para-sulfamoylphenyl at position 1 of the pyrazole was found to have a higher potency for COX-2 selective inhibition than a para-methoxyphenyl (see structures 1 and 2, below). In addition, a 4-(methylsulfonyl)phenyl or 4-sulfamoylphenyl is known to be necessary for COX-2 inhibition. For instance, replacing either of these entities with a –SO2NHCH3 substituent diminishes COX-2 inhibitory activity as noted with a very high inhibitory concentration-50 (see structures 3 - 5). At the 3-position of the pyrazole, a trifluoromethyl or difluoromethyl provides superior selectivity and potency compared to a fluoromethyl or methyl substitution (see structures 6 – 9).[29]

Celecoxib is compound 22; the 4-sulfamoylphenyl on the 1-pyrazol substituent is required for COX-2 inhibition and the 4-methyl on the 5-pyrazol system has low steric hindrance to maximize potency, while the 3-trifluoromethyl group provides superior selectivity and potency.[29] To explain the selectivity of celecoxib, it is necessary to analyze the free energy of binding difference between the drug molecule and COX-1 compared to COX-2 enzymes. The structural modifications highlight the importance of binding to residue 523 in the side binding pocket of the cyclooxygenase enzyme, which is an isoleucine in COX-1 and a valine in COX-2.[30] This mutation appears to contribute to COX-2 selectivity by creating steric hindrance between the sulfonamide oxygen and the methyl group of Ile523 that effectively destabilizes the celecoxib-COX-1 complex.[30] Thus, it is reasonable to expect COX-2-selective inhibitors to be more bulky than nonselective NSAIDs.

History[edit]

Two lawsuits arose over discovery of celecoxib. Daniel L. Simmons of Brigham Young University discovered the COX-2 enzyme,[31] and BYU entered into a collaboration with Monsanto to develop drugs to inhibit it. BYU ended up suing Pfizer for breach of contract.[32] A settlement was reached in April 2012 in which Pfizer agreed to pay $450 million.[33][34] Other important discoveries in COX-2 were made at University of Rochester, which patented the discoveries.[35] When the patent issued, the university sued Searle (later Pfizer) in a case called, University of Rochester v. G.D. Searle & Co., 358 F.3d 916 (Fed. Cir. 2004). The court ruled in favor of Searle in 2004, holding in essence that the university had claimed a method requiring, yet provided no written description of, a compound that could inhibit COX-2 and therefore the patent was invalid.[36][37]

After the withdrawal of rofecoxib from the market in September 2004, Celebrex enjoyed a robust increase in sales. However, the results of the APC trial in December of that year raised concerns that Celebrex might carry risks similar to those of rofecoxib, and Pfizer announced a moratorium on direct-to-consumer advertising of Celebrex soon afterwards. After a significant drop, sales of Celebrex have recovered, and reached $2 billion in 2006.[15] Pfizer resumed advertising Celebrex in magazines in 2006,[38] and resumed television advertising in April 2007 with an unorthodox, 2 12-minute advertisement which extensively discussed the adverse effects of Celebrex in comparison with other anti-inflammatory drugs. The ad drew criticism from the consumer advocacy group Public Citizen, which called the ad's comparisons misleading.[39] Pfizer responded to Public Citizen's concerns with assurances that they are truthfully advertising the risk and benefits of Celebrex as set forth by the FDA.[39]

In late 2007, Pfizer released another US television ad for Celebrex, which also discussed celecoxib's adverse effects in comparison with those of other anti-inflammatory drugs.

Society and culture[edit]

Fabricated efficacy studies[edit]

On March 11, 2009, Scott S. Reuben, former chief of acute pain at Baystate Medical Center, Springfield, Massachusetts, revealed that the data for 21 studies he had authored for the efficacy of the drug (along with others such as Vioxx) had been fabricated. The analgesic effects of the drugs had been exaggerated. Reuben was also a former paid spokesperson for Pfizer. None of the retracted studies was submitted to either the US Food and Drug Administration or the European Union's regulatory agencies prior to the drug's approval. Pfizer issued a public statement declaring, "It is very disappointing to learn about Dr. Scott Reuben's alleged actions. When we decided to support Dr. Reuben's research, he worked for a credible academic medical center and appeared to be a reputable investigator."[40][41]

Availability[edit]

Pfizer markets celecoxib under the brand name Celebrex, and it is available as oral capsules containing 50, 100, 200 or 400 mg of celecoxib.[42]

Outside the US, including India and the Philippines, it is legally available as a generic under several brand names.[43] In the US, celecoxib was covered by three patents, two of which expired May 30, 2014, and one of which (US RE44048[44]) was due to expire December 2, 2015. On March 13, 2014, that patent was found to be invalid for double patenting.[45] Upon the patent expiry on May 30, 2014, FDA approved the first versions of celecoxib generic.[46]

Research[edit]

Cancer prevention[edit]

The role celecoxib might have in reducing the rates of certain cancers has been the subject of many studies. However, no current medical recommendation exists to use this drug for cancer reduction.

The use of celecoxib to reduce the risk of colorectal cancer has been investigated, but neither celecoxib nor any other drug is indicated for this use.[47] Small-scale clinical trials in very high-risk people (belonging to FAP families) showed celecoxib can prevent polyp growth. Hence, large-scale randomized clinical trials were undertaken .[48] Results show a 33 to 45% polyp recurrence reduction in people treated with celecoxib each day. However, serious cardiovascular events were significantly more frequent in the celecoxib-treated groups. Aspirin shows a similar (and possibly larger) protective effect,[49][50][51] has demonstrated cardioprotective effects and is significantly cheaper, but no head-to-head clinical trials have compared the two drugs.

Cancer treatment[edit]

Different from cancer prevention, cancer treatment is focused on the therapy of tumors that have already formed and have established themselves inside the patient. Many studies are going on to determine whether celecoxib might be useful for this latter condition.[52] However, during molecular studies in the laboratory, it became apparent that celecoxib could interact with other intracellular components besides its most famous target, COX-2. The discovery of these additional targets has generated much controversy, and the initial assumption that celecoxib reduces tumor growth primarily by the inhibition of COX-2 became contentious.[53]

Certainly, the inhibition of COX-2 is paramount for the anti-inflammatory and analgesic function of celecoxib. However, whether inhibition of COX-2 also plays a dominant role in this drug’s anticancer effects is unclear. For example, a recent study with malignant tumor cells showed celecoxib could inhibit the growth of these cells in vitro, but COX-2 played no role in this outcome; even more strikingly, the anticancer effects of celecoxib were also obtained with the use of cancer cell types that do not even contain COX-2.[54]

Additional support for the idea that other targets besides COX-2 are important for celecoxib's anticancer effects has come from studies with chemically modified versions of celecoxib. Several dozen analogs of celecoxib were generated with small alterations in their chemical structures.[55] Some of these analogs retained COX-2 inhibitory activity, whereas many others did not. However, when the ability of all these compounds to kill tumor cells in cell culture was investigated, the antitumor potency did not at all depend on whether or not the respective compound could inhibit COX-2, showing the inhibition of COX-2 was not required for the anticancer effects.[55][56] One of these compounds, 2,5-dimethyl-celecoxib, which entirely lacks the ability to inhibit COX-2, actually displayed stronger anticancer activity than celecoxib.[57]

Adhesion prevention[edit]

Celocoxib may prevent intra-abdominal adhesion formation. Adhesions are a common complication of surgery, especially abdominal surgery, and major cause of bowel obstruction and infertility. Publishing in 2005, researchers in Boston noticed a "dramatic" reduction in postsurgical adhesions in mice taking the drug celecoxib.[58] As of January 2005 Multi-institutional trials in adult human patients are planned.[59]

The initially suggested course of treatment is seven to 10 days following surgery.[60]

References[edit]

  1. ^ a b c d e McCormack, PL (December 2011). "Celecoxib: a review of its use for symptomatic relief in the treatment of osteoarthritis, rheumatoid arthritis and ankylosing spondylitis.". Drugs 71 (18): 2457–89. doi:10.2165/11208240-000000000-00000. PMID 22141388. 
  2. ^ a b c d e f g h i "Drug Label". 
  3. ^ a b c d Coxib and traditional NSAID Trialists' (CNT), Collaboration; Bhala, N; Emberson, J; Merhi, A; Abramson, S; Arber, N; Baron, JA; Bombardier, C; Cannon, C; Farkouh, ME; FitzGerald, GA; Goss, P; Halls, H; Hawk, E; Hawkey, C; Hennekens, C; Hochberg, M; Holland, LE; Kearney, PM; Laine, L; Lanas, A; Lance, P; Laupacis, A; Oates, J; Patrono, C; Schnitzer, TJ; Solomon, S; Tugwell, P; Wilson, K; Wittes, J; Baigent, C (Aug 31, 2013). "Vascular and upper gastrointestinal effects of non-steroidal anti-inflammatory drugs: meta-analyses of individual participant data from randomised trials". Lancet 382 (9894): 769–79. doi:10.1016/S0140-6736(13)60900-9. PMC 3778977. PMID 23726390. 
  4. ^ Derry, S; Moore, RA (Mar 14, 2012). "Single dose oral celecoxib for acute postoperative pain in adults". In Derry, Sheena. The Cochrane database of systematic reviews 3: CD004233. doi:10.1002/14651858.CD004233.pub3. PMID 22419293. 
  5. ^ Yelland MJ, Nikles CJ, McNairn N, Del Mar CB, Schluter PJ, Brown RM (2007). "Celecoxib compared with sustained-release paracetamol for osteoarthritis: a series of n-of-1 trials". Rheumatology 46 (1): 135–40. doi:10.1093/rheumatology/kel195. PMID 16777855. 
  6. ^ Zhang W, Moskowitz RW, Nuki G et al. (September 2007). "OARSI recommendations for the management of hip and knee osteoarthritis, part I: critical appraisal of existing treatment guidelines and systematic review of current research evidence". Osteoarthr. Cartil. 15 (9): 981–1000. doi:10.1016/j.joca.2007.06.014. PMID 17719803. 
  7. ^ Flood, J (March 2010). "The role of acetaminophen in the treatment of osteoarthritis". The American journal of managed care. 16 Suppl Management: S48–54. PMID 20297877. 
  8. ^ Fan, X; Song, X (February 2013). "Review: non-steroidal anti-inflammatory drugs may reduce schizophrenia symptom severity in the short term when added to antipsychotics." (PDF). Evidence-Based Mental Health 16 (1): 10. doi:10.1136/eb-2012-100865. PMID 23093694. 
  9. ^ Müller, N; Myint, AM; Krause, D; Weidinger, E; Schwarz, MJ (April 2013). "Anti-inflammatory treatment in schizophrenia.". Progress in Neuro-Psychopharmacology & Biological Psychiatry 42: 146–53. doi:10.1016/j.pnpbp.2012.11.008. PMID 23178230. 
  10. ^ Na, KS; Lee, KJ; Lee, JS; Cho, YS; Jung, HY (January 2014). "Efficacy of adjunctive celecoxib treatment for patients with major depressive disorder: a meta-analysis.". Progress in Neuro-Psychopharmacology & Biological Psychiatry 48: 79–85. doi:10.1016/j.pnpbp.2013.09.006. PMID 24056287. 
  11. ^ Rosenblat, JD; Cha, DS; Mansur, RB; McIntyre, RS (January 2014). "Inflamed moods: A review of the interactions between inflammation and mood disorders.". Progress in Neuro-Psychopharmacology & Biological Psychiatry 53C: 23–34. doi:10.1016/j.pnpbp.2014.01.013. PMID 24468642. 
  12. ^ Fond, G; Hamdani, N; Kapczinski, F; Boukouaci, W; Drancourt, N; Dargel, A; Oliveira, J; Le Guen, E; Marlinge, E; Tamouza, R; Leboyer, M (March 2014). "Effectiveness and tolerance of anti-inflammatory drugs' add-on therapy in major mental disorders: a systematic qualitative review.". Acta Psychiatrica Scandinavica 129 (3): 163–79. doi:10.1111/acps.12211. PMID 24215721. 
  13. ^ a b "Celecoxib". The American Society of Health-System Pharmacists. Retrieved Apr 21, 2014. 
  14. ^ Solomon, S.; McMurray, J.; Pfeffer, M.; Wittes, J.; Fowler, R.; Finn, P.; Anderson, W.; Zauber, A.; Hawk, E.; Bertagnolli, M.; Adenoma Prevention with Celecoxib (APC) Study Investigators (2005). "Cardiovascular risk associated with celecoxib in a clinical trial for colorectal adenoma prevention". The New England Journal of Medicine 352 (11): 1071–1080. doi:10.1056/NEJMoa050405. PMID 15713944.  edit
  15. ^ a b Antman EM, et al Use of nonsteroidal antiinflammatory drugs: an update for clinicians: a scientific statement from the American Heart Association. Circulation. 2007 Mar 27;115(12):1634-42. Epub 2007 Feb 26.
  16. ^ Kimmel SE, Berlin JA, Reilly M, Jaskowiak J, Kishel L, Chittams J, Strom BL. Patients Exposed to Rofecoxib and Celecoxib Have Different Odds of Nonfatal Myocardial Infarction" Ann Intern Med 2005;142:157-164.
  17. ^ Mukherjee D, Nissen SE, Topol EJ. Inhibitors Risk of Cardiovascular Events Associated With Selective COX-2 Inhibitors" JAMA 2001;286(8) 954-959 doi:10.1001/jama.286.8.954.
  18. ^ Jenkins JK, Seligman PJ. (2005-04-06). "Analysis and recommendations for Agency action regarding nonsteroidal anti-inflammatory drugs and cardiovascular risk [decision memorandum]" (PDF). FDA Center for Drug Evaluation and Research. 
  19. ^ Chen LC, Ashcroft DM. Do selective COX-2 inhibitors increase the risk of cerebrovascular events? A meta-analysis of randomized controlled trials.Journal of Clinical Pharmacy and Therapeutics (2006) 31, 565–576.
  20. ^ a b Celebrex label Accessed December 27, 2012
  21. ^ a b Mathew, ST; Devi S, G; Prasanth, VV; Vinod, B (2011). "Efficacy and Safety of COX-2 Inhibitors in the Clinical Management of Arthritis: Mini Review.". ISRN pharmacology 2011: 480291. doi:10.5402/2011/480291. PMC 3197256. PMID 22084715. 
  22. ^ a b Katzung, edited by Bertram G. (2007). Basic & clinical pharmacology (10th ed. ed.). New York: McGraw-Hill Medical. p. 579. ISBN 9780071451536. 
  23. ^ Shi, S; Klotz, U (Mar 2008). "Clinical use and pharmacological properties of selective COX-2 inhibitors.". European journal of clinical pharmacology 64 (3): 233–52. doi:10.1007/s00228-007-0400-7. PMID 17999057. 
  24. ^ Conaghan, PG (Jun 2012). "A turbulent decade for NSAIDs: update on current concepts of classification, epidemiology, comparative efficacy, and toxicity.". Rheumatology international 32 (6): 1491–502. doi:10.1007/s00296-011-2263-6. PMC 3364420. PMID 22193214. 
  25. ^ DiPiro, Joseph T., Robert L. Talbert, Gary C. Yee, Gary R. Matzke, Barbara G. Wells, and L. Michael Posey. Pharmacotherapy A Pathophysiologic Approach (Pharmacotherapy (Dipiro) Pharmacotherapy (Dipiro)). New York: McGraw-Hill Medical, 2008. Print.
  26. ^ Bhatt, DL; Scheiman, J; Abraham, NS; Antman, EM; Chan, FK; Furberg, CD; Johnson, DA; Mahaffey, KW; Quigley, EM; Harrington, RA; Bates, ER; Bridges, CR; Eisenberg, MJ; Ferrari, VA; Hlatky, MA; Kaul, S; Lindner, JR; Moliterno, DJ; Mukherjee, D; Schofield, RS; Rosenson, RS; Stein, JH; Weitz, HH; Wesley, DJ; American College of Cardiology Foundation Task Force on Clinical Expert Consensus, Documents (Oct 28, 2008). "ACCF/ACG/AHA 2008 expert consensus document on reducing the gastrointestinal risks of antiplatelet therapy and NSAID use: a report of the American College of Cardiology Foundation Task Force on Clinical Expert Consensus Documents.". Journal of the American College of Cardiology 52 (18): 1502–17. doi:10.1016/j.jacc.2008.08.002. PMID 19017521. 
  27. ^ Half, E; Arber, N (Feb 2009). "Colon cancer: preventive agents and the present status of chemoprevention.". Expert opinion on pharmacotherapy 10 (2): 211–9. doi:10.1517/14656560802560153. PMID 19236194. 
  28. ^ Cadherin-11 in poor prognosis malignancies and rheumatoid arthritis: common target, common therapies.. 
  29. ^ a b c d Penning TD, Talley JJ, Bertenshaw SR et al. (1997). "Synthesis and Biological Evaluation of the 1.5 Diarylpyrazole Class of Cyclooxygenase-2 Inhibitors: Identification of 4-[5-(4-Methylphenyl)-3-(trifluoromethyl)-1H-pyrazole-1-yl]benzenesulfonamide (SC-58634, Celecoxib)". Journal of Medicinal Chemistry 40 (9): 1347–1365. doi:10.1021/jm960803q. PMID 9135032. 
  30. ^ a b Price MLP, Jorgensen WL. Rationale for the Observed COX-2/COX-1 Selectivity of Celecoxibfrom Monte Carlo Simulations. Bioorganic and Medicinal Chemistry Lectures. 2001; 11: 1541-1544.
  31. ^ Yajnik J (2006-10-27). "University sues Pfizer over COX-2 research". The Scientist. Retrieved 2010-11-11. 
  32. ^ Linda Thomson (October 28, 2009). "Judge orders Pfizer to pay BYU $852K for suit delays". Deseret News. 
  33. ^ Tom Harvey (May 1, 2012). "Pfizer, BYU settle Celebrex lawsuit for $450M". The Salt Lake Tribune. 
  34. ^ Associated Press, May 1, 2012 Pfizer Settles B.Y.U. Lawsuit Over Development of Celebrex
  35. ^ U.S. Patent 6,048,850
  36. ^ Reach-Through Claims Declared Invalid
  37. ^ Ranjana Kadle (2004) CAFC Court Decision Reach-Through Claims Declared Invalid
  38. ^ Berenson A (April 29, 2006). "Celebrex Ads Are Back, Dire Warnings and All". The New York Times. 
  39. ^ a b Saul S (April 10, 2007). "Celebrex Commercial, Long and Unconventional, Draws Criticism". The New York Times. 
  40. ^ Winstein, Keith J. (March 11, 2009). "Top Pain Scientist Fabricated Data in Studies, Hospital Says". The Wall Street Journal. 
  41. ^ "Associated Press, Mar 11, 2009, Mass. doctor accused of faking pain pill data". [dead link]
  42. ^ CELEBREX indications and dosing: Official Pfizer site
  43. ^ Celecoxib at drugs.com
  44. ^ US Re-issued Patent RE44048
  45. ^ Roger Parloff for Fortune Magazine. March 13, 2014 Judge cuts 18 months off patent life of Pfizer's Celebrex
  46. ^ FDA Press Release, May 30, 2014. FDA approves first generic versions of celecoxib
  47. ^ Rial NS et al (2012) Clinical end points for developing pharmaceuticals to manage patients with a sporadic or genetic risk of colorectal cancer. Expert Rev Gastroenterol Hepatol. 2012 Aug;6(4):507-17
  48. ^ Bertagnolli MM, Eagle CJ, Zauber AG, et al. (August 2006). "Celecoxib for the prevention of sporadic colorectal adenomas". N. Engl. J. Med. 355 (9): 873–84. doi:10.1056/NEJMoa061355. PMID 16943400. 
  49. ^ Baron JA, Cole BF, Sandler RS, et al. (2003). "A randomized trial of aspirin to prevent colorectal adenomas". N. Engl. J. Med. 348 (10): 891–9. doi:10.1056/NEJMoa021735. PMID 12621133. 
  50. ^ Sandler RS, Halabi S, Baron JA, et al. (2003). "A randomized trial of aspirin to prevent colorectal adenomas in patients with previous colorectal cancer". N. Engl. J. Med. 348 (10): 883–90. doi:10.1056/NEJMoa021633. PMID 12621132. 
  51. ^ Bosetti C, Talamini R, Franceschi S, Negri E, Garavello W, La Vecchia C (2003). "Aspirin use and cancers of the upper aerodigestive tract". British Journal of Cancer 88 (5): 672–4. doi:10.1038/sj.bjc.6600820. PMC 2376339. PMID 12618872. 
  52. ^ Dannenberg AJ, Subbaramaiah K (December 2003). "Targeting cyclooxygenase-2 in human neoplasia: rationale and promise". Cancer Cell 4 (6): 431–6. doi:10.1016/S1535-6108(03)00310-6. PMID 14706335. 
  53. ^ Schönthal AH (December 2007). "Direct non-cyclooxygenase-2 targets of celecoxib and their potential relevance for cancer therapy". Br. J. Cancer 97 (11): 1465–8. doi:10.1038/sj.bjc.6604049. PMC 2360267. PMID 17955049. 
  54. ^ Chuang, Huan-Ching; Kardosh, A; Gaffney, KJ; Petasis, NA; Schönthal, AH (2008). "COX-2 inhibition is neither necessary nor sufficient for celecoxib to suppress tumor cell proliferation and focus formation in vitro". Molecular Cancer 7 (1): 38. doi:10.1186/1476-4598-7-38. PMC 2396175. PMID 18485224. 
  55. ^ a b Zhu J, Song X, Lin HP, et al. (December 2002). "Using cyclooxygenase-2 inhibitors as molecular platforms to develop a new class of apoptosis-inducing agents". Journal of the National Cancer Institute 94 (23): 1745–57. doi:10.1093/jnci/94.23.1745. PMID 12464646. 
  56. ^ Schönthal AH, Chen TC, Hofman FM, Louie SG, Petasis NA (February 2008). "Celecoxib analogs that lack COX-2 inhibitory function: preclinical development of novel anticancer drugs". Expert Opinion on Investigational Drugs 17 (2): 197–208. doi:10.1517/13543784.17.2.197. PMID 18230053. 
  57. ^ Schönthal AH (2006). "Antitumor properties of dimethyl-celecoxib, a derivative of celecoxib that does not inhibit cyclooxygenase-2: implications for glioma therapy". Neurosurgical Focus 20 (4): E21. doi:10.3171/foc.2006.20.4.14. PMID 16709027. 
  58. ^ Arin K. Greene, MD, MMSc,Ian P. J. Alwayn, MD, PhD, Vania Nose, MD, PhD, Evelyn Flynn, MA, David Sampson, BA, David Zurakowski, PhD, Judah Folkman, MD, and Mark Puder, MD (July 2005). "Prevention of Intra-abdominal Adhesions Using the Antiangiogenic COX-2 Inhibitor Celecoxib". Ann Surg. 242 (1): 140–146. doi:10.1097/01.sla.0000167847.53159.c1. PMC 1357715. PMID 15973112. 
  59. ^ "Celebrex Prevents Adhesions After Surgery". Children's Hospital Boston. January 26, 2005. Retrieved 2009-03-11. No-content Aug 2014
  60. ^ Viinikka, Tai (February 25, 2005). "COX-2 Inhibitors May Prevent Common Surgical Complication". Focus Online. Harvard Medical, Dental, and Public Health Schools. Retrieved 2009-03-11. 

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