Anti-inflammatory Agents and Cholesterol Metabolism

Osteoarthritis Clinical Trial

Official title:

Impact of Anti-inflammatory Agents on Cholesterol Metabolism and Atherogenic Potency of Patient Plasma

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT01279395
• Other study ID #: 151973-1
• Status: Terminated
• Start date: November 2010
• Est. completion date: January 18, 2018

Study information

• Verified date: August 2019
• Source: Winthrop University Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

We hypothesize that administration of anti-inflammatory medications such as celecoxib, naprosyn and diclofenac will cause changes in the blood plasma and white blood cells of patients such that they will be less able to efficiently process cholesterol.

Description:

Drugs that inhibit cyclooxygenase (COX) are frequently administered to relieve pain and inflammation, but have been associated with cardiovascular (CV) toxicity and an elevated risk of acute myocardial infarction. We have demonstrated that drugs that inhibit the COX-2 isoform act to interfere with cellular cholesterol movement by suppressing expression of proteins that facilitate efflux of cholesterol as well as by enhancing expression of scavenger receptors that mediate cholesterol uptake. We further showed that in cultured THP-1 human macrophages, COX-2 inhibition with drugs (celecoxib, NS398) or by COX-2 RNA silencing leads to foam cell transformation, a critical component of atherogenesis. Thus, COX-2 inhibitors act in a pro-atherogenic fashion on a series of genes which we have named the "Cholesterol Metabolic Signature." Alterations in this signature may contribute to heightened risk of development of atherosclerotic CV disease associated with prolonged use of this drug class. COX enzyme activity supports cholesterol homeostasis through catalysis of prostaglandin (PG) production, and we have shown in vitro that specific subsets of these PGs (PGD2 or PGE2) are sufficient to maintain balance. The aims of this project is: In an observational study of persons with pharmacologic COX-2 selective inhibition (celecoxib) or COX-1/2 inhibition (naproxen, diclofenac), document treatment effects on the Cholesterol Metabolic Signature in isolated subject mononuclear cells and in naïve THP-1 monocytes/macrophages exposed to subject plasma. This will allow detection of variations in degree of pro-atherogenic response of the Cholesterol Metabolic Signature to COX inhibition within human patients that may be associated with a higher likelihood of developing CV sequelae. Understanding the nature of the association between COX inhibition and cholesterol metabolism, and the extent to which they may promote atherosclerotic CV disease, is of critical importance in developing analgesic and anti-inflammatory medications with a more favorable risk profile. The knowledge gained may also improve clinical decision-making by identifying subsets of patients most vulnerable to adverse CV effects of COX inhibition.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 3
• Est. completion date: January 18, 2018
• Est. primary completion date: January 18, 2018
• Accepts healthy volunteers: No
• Gender: All
• Age group: 40 Years to 70 Years

Eligibility

Inclusion Criteria:

• Age 40-70, osteoarthritis, male or female

Exclusion Criteria:

• other known autoimmune or inflammatory rheumatic conditions, renal disease, current or recent (>1 month) corticosteroid or statin treatment, contraindications to medication (i.e. those taking oral anticoagulants, e.g. warfarin), those pregnant or trying to become pregnant or breastfeeding. Participants will not have consumed any medications containing aspirin or other NSAIDs for at least 2 weeks before the trial.

Related Conditions & MeSH terms

• Osteoarthritis

Locations

Country	Name	City	State
United States	Winthrop University Hospital	Mineola	New York

Sponsors (1)

Lead Sponsor	Collaborator
Winthrop University Hospital

Country where clinical trial is conducted

United States, 

References & Publications (3)

Anwar K, Voloshyna I, Littlefield MJ, Carsons SE, Wirkowski PA, Jaber NL, Sohn A, Eapen S, Reiss AB. COX-2 inhibition and inhibition of cytosolic phospholipase A2 increase CD36 expression and foam cell formation in THP-1 cells. Lipids. 2011 Feb;46(2):131-42. doi: 10.1007/s11745-010-3502-4. Epub 2010 Dec 22. — View Citation

Chan ES, Zhang H, Fernandez P, Edelman SD, Pillinger MH, Ragolia L, Palaia T, Carsons S, Reiss AB. Effect of cyclooxygenase inhibition on cholesterol efflux proteins and atheromatous foam cell transformation in THP-1 human macrophages: a possible mechanism for increased cardiovascular risk. Arthritis Res Ther. 2007;9(1):R4. — View Citation

Reiss AB, Anwar F, Chan ES, Anwar K. Disruption of cholesterol efflux by coxib medications and inflammatory processes: link to increased cardiovascular risk. J Investig Med. 2009 Aug;57(6):695-702. doi: 10.2310/JIM.0b013e31819ec3c7. Review. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Difference in expression of the cholesterol-metabolizing enzyme cytochrome P450 cholesterol 27-hydroxylase in peripheral blood mononuclear cells (PBMC) before and after treatment with naprosyn, celecoxib or diclofenac.	PBMC are isolated directly from patient blood by Ficoll hypaque gradient centrifugation. Total RNA is obtained (TriZol) from PBMC. 27-hydroxylase message is quantitated by quantitative real-time polymerase chain reaction (QRT-PCR) using specific primers.	2 weeks
Secondary	Difference in expression of cholesterol 27-hydroxylase in naive THP-1 human macrophages incubated in plasma from patients obtained before and after treatment with naprosyn, diclofenac or celecoxib.	Comparison of abundance of the cholesterol-metabolizing enzyme cytochrome P450 cholesterol 27-hydroxylase in the THP-1 human monocyte/macrophage cell line incubated in plasma taken from the same patient before and after treatment with naprosyn, celecoxib or diclofenac. 27-hydroxylase message is quantitated by QRT-PCR and protein by immunoblot.	2 weeks