Effects of Allopurinol on Inflammation and Ultrasonographic Changes in People With Elevated Uric Acid But no Symptoms
Primary Purpose
Musculoskeletal Degeneration, Inflammation, Hyperuricemia
Status
Unknown status
Phase
Phase 3
Locations
Mexico
Study Type
Interventional
Intervention
Allopurinol Pill
Sponsored by
About this trial
This is an interventional treatment trial for Musculoskeletal Degeneration focused on measuring allopurinol, ultrasound, morphostructural changes
Eligibility Criteria
Inclusion Criteria:
- Individuals with two urate determinations >7 mg/dL in the last year and no clinical sign, past or present, suggestive of joint inflammation (acute gout attack), urolithiasis or uric acid nephropathy
- Over 18 years of age
- Residents of Mexico City or its metropolitan area
- Individuals with a signed informed consent form for the participation in the clinical trial
Exclusion Criteria:
- Individuals with joint inflammation suggestive of gout during the clinical evaluation
- Patients without elemental ultrasonographic lesions (double contour sign, aggregates, tophi) on the first metatarsophalangeal joint, knee, ankle or the tendons of the quadriceps, patella, and calcaneus when evaluated by MSUS
- Patients taking thiazides
- Patients with history of stroke or coronary artery disease in the last year
- Patients with osteoarthritis be it by clinical presentation or imaging
- Pregnant women
- Neoplasms
- Known Hepatitis B Virus (HBV), Hepatitis C Virus (HCV) , Human immunodeficiency Virus (HIV) infection, or any other know active infections
- Autoimmune or autoinflammatory disease
- Allopurinol hypersensitivity or allergy
- Deteriorated kidney function (Glomerular Filtration Rate (GFR) <50 mL/min/1.73m^2)
- Patients taking azathioprine
- Functional New York Heart Association (NYHA) score of II or more
Sites / Locations
- Instituto Nacional de CardiologíaRecruiting
- National Institute of Cardiology MexicoRecruiting
Arms of the Study
Arm 1
Arm Type
Experimental
Arm Label
allopurinol
Arm Description
150 mg daily for a month then 300 mg daily for the rest of the study (5 months)
Outcomes
Primary Outcome Measures
inflammatory markers
To measure changes in proinflammatory cytokines (Interleukin 1ß (IL-1ß))
inflammatory markers
To measure changes in proinflammatory cytokines (Tumor Necrosis Factor)
inflammatory markers
To measure changes in proinflammatory cytokines (Interleukin 6 (IL-6))
inflammatory markers
To measure changes in proinflammatory cytokines (Interferon-γ)
inflammatory markers
To measure changes in proinflammatory cytokines (Interleukin 18 (IL-18))
inflammatory markers
To measure changes in proinflammatory cytokines (Interleukin 17 (IL-17))
inflammatory markers
To measure changes in chemokines (Interleukin 8 (IL-8))
inflammatory markers
To measure changes in chemokines (monocyte chemoattractant protein 1 (MCP-1))
inflammatory markers
To measure changes in microRNAs (miR) (miR-155)
inflammatory markers
To measure changes in the percentage of Cluster of Differentiation 4 cells that lack the expression of Cluster of Differentiation 28 (CD4+CD28null)
Secondary Outcome Measures
musculoskeletal ultrasound
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Double contour sign is a hyperechoic abnormal band over the superficial margin of articular hyaline cartilage, independent from insonation angle which can be regular or irregular, continuous or intermittent and that distinguishes itself from the cartilage interphase sign)
musculoskeletal ultrasound
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Tophi are described, independent of location, as an heterogenous, circumscript aggregate, hyper- and/or hypoechoic, which can be surrounded by a small anechoic halo and can have a posterior acoustic shadow)
musculoskeletal ultrasound
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Aggregates are described, independent of location, as heterogenous hyperechoic foci which maintain a high degree of reflectivity even when gain is reduced to the minimum or when the insonation angle is changed, also they can sometimes create a posterior acoustic shadow)
musculoskeletal ultrasound
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Erosions are described as a discontinuation of the bone surface, seen in two perpendicular planes)
Full Information
NCT ID
NCT04012294
First Posted
July 3, 2019
Last Updated
January 22, 2020
Sponsor
Instituto Nacional de Cardiologia Ignacio Chavez
Collaborators
Instituto Nacional de Rehabilitacion
1. Study Identification
Unique Protocol Identification Number
NCT04012294
Brief Title
Effects of Allopurinol on Inflammation and Ultrasonographic Changes in People With Elevated Uric Acid But no Symptoms
Official Title
Effects of Allopurinol on Inflammatory Markers and Morphostructural Changes Evidenced by Musculoskeletal Ultrasound in Individuals With Asymptomatic Hyperuricemia. A Proof of Concept
Study Type
Interventional
2. Study Status
Record Verification Date
January 2020
Overall Recruitment Status
Unknown status
Study Start Date
August 30, 2019 (Actual)
Primary Completion Date
July 30, 2020 (Anticipated)
Study Completion Date
February 28, 2021 (Anticipated)
3. Sponsor/Collaborators
Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
Instituto Nacional de Cardiologia Ignacio Chavez
Collaborators
Instituto Nacional de Rehabilitacion
4. Oversight
Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
No
Product Manufactured in and Exported from the U.S.
No
Data Monitoring Committee
No
5. Study Description
Brief Summary
Hyperuricemia is a metabolic alteration defined as the presence of serum urate levels higher than 7 mg/dL. This has proven to be the maximum limit of solubility of urate in serum, any higher concentration leads to precipitation and eventually to the formation of monosodium urate (MSU) crystals. The accumulation of said crystals can manifest as gouty arthritis, uric acid nephropathy, urolithiasis or chronic tophaceous gout.
A strong relation between hyperuricemia and other chronic degenerative diseases, including diabetes mellitus, systemic arterial hypertension, obesity and metabolic syndrome, has been consistently proven.
Hypouricemic pharmacological agents have shown a decrease in cardiovascular complications and death in patients with gout.
A series of studies conducted on individuals with asymptomatic hyperuricemia using musculoskeletal ultrasound (MSUS) have shown the presence of morphostructural changes suggestive of MSU crystal deposits, combined with an elevation in a series of inflammation markers to a degree similar to those found in patients with chronic gout.
Even though, there is evidence of morphostructural damage in individuals with asymptomatic hyperuricemia, there are no clinical, laboratorial or imaging parameters that indicate when hypouricemic treatment should be started.
This clinical trial is proposed as a proof of concept which is looking to evaluate if treatment with allopurinol induces changes in levels of inflammatory markers in individuals with asymptomatic hyperuricemia and morphostructural changes suggestive of MSU crystal deposits. this proof of concept is not looking to measure the efficiency, effectiveness or security of the treatment.
Our Hypothesis is that Individuals with asymptomatic hyperuricemia and morphostructural changes evidenced by MSUS (double contour sing, tophi, aggregates) will show a decent in inflammatory markers and their morphostructural changes will diminish or revert after treatment with allopurinol.
Detailed Description
Gout is the most prevalent inflammatory rheumatological disease among young men, affecting about 4% of the general population. Caused by the deposit of monosodium urate (MSU) crystals which form because of high urate concentrations in serum. Currently, there is no universal definition for hyperuricemia but The Gout, Hyperuricemia, and Crystal-Associated Disease Network (G-CAN) define hyperuricemia as a blood urate concentration above the saturation threshold which is usually understood to be urate levels over 7 mg/dL. For this study, the term urate will be used as the final circulating product of the enzyme xanthine oxidase in the purine metabolism which favors the precipitation and formation of MSU crystals. Even tough, hyperuricemia is often asymptomatic, the clinical presentation can be that of gouty arthritis, uric acid nephropathy, urolithiasis and/or chronic tophaceous gout.
The relevance of asymptomatic hyperuricemia lays in the relation to other chronic degenerative diseases, including atherosclerotic disease, systemic arterial hypertension, coronary artery disease and chronic kidney disease.
A logistic regression analysis made by Zhu et al, looking specifically at the demographics of gout and asymptomatic hyperuricemia based on the data from The National Health and Nutrition Examination Survey (NHANES) showed a general hyperuricemia prevalence of 13.2%, which corresponds to about 26.6 million individuals. Additionally, it was observed that hyperuricemia increases with age, it being more common in individuals over 65 years, prevalence of 31%, corresponding to approximately 10.7 million American adults. Other epidemiological studies have evidenced the relationship between asymptomatic hyperuricemia y different comorbidities for example atherosclerotic disease, systemic arterial hypertension, coronary artery disease and metabolic syndrome. Those studies suggest that elevated urate levels are an independent cardiovascular risk factor. Their findings also suggest that lowering serum urate levels is associated with a descend in the risk of cardiovascular complications. In spite of this, there is currently no indication for hypouricemic pharmacological treatment for individuals with hyperuricemia that don´t have a diagnosis of gout, urolithiasis, uric acid nephropathy or as prophylaxis for tumoral lysis syndrome. The I-Lan Longitudinal Aging Study (ILAS), a cohort study from Taiwan, showed a higher cardiovascular risk in individuals without diabetes or previous cardiovascular disease but with serum urate levels above 6.1 mg/dL. Lastly, our group has shown that the presence of hyperuricemia at admission in the emergency room doubles the short-term risk of death (30 days) in patients with coronary heart disease.
Hyperuricemia increases the risk of atherosclerosis by up to 60%. It is believed that the cause for this lay in the activation of the inflammasome´s cryopyrin (NLRP3) protein complex by the MSU crystals . This promotes the release of pro-inflammatory cytokines and chemokines, particularly the mature forms of interleukin (IL)-1β and IL-18. In addition, the phagocytosis of MSU crystals executed by neutrophils and macrophages, induces production of reactive oxygen and nitrogen species all of which lead to oxidative stress and consequently to endothelial dysfunction. When kept chronically, it is probable that these mechanisms result in atherosclerosis. Solid evidence has shown that pharmacological treatment aimed at reducing urate levels is beneficial in patients with gout since it lowers the occurrence of adverse cardiovascular events and all-cause mortality. There is still a group of individuals with chronically elevated urate levels without clinical manifestations for which pharmacological treatment remains a topic of debate and controversy. Even though, some of these individuals could benefit from hypouricemic pharmacological therapy, there is currently no criteria for determining when it should be started. The first line of treatment are xanthine oxidase inhibitors like allopurinol and febuxostat. Both lower serum urate in comparable concentrations but a study done comparing the two agents showed that allopurinol induces a more significant global survival rate than febuxostat therefore treatment with allopurinol is preferred.
Musculoskeletal ultrasound (MSUS) has proven to be an excellent, noninvasive, diagnostic tool for different articular and rheumatological diseases. Its value lays in the evaluation of tendons, ligaments, joints and periarticular soft tissue. MSUS is useful in early stages of a disease, when no symptoms are present, and also at the chronic stages with established morphostructural damage. It has proven to be sensible to change, so it can be used to follow up on morphostructural changes during the course of treatment. Additionally, having color doppler and power doppler (PD) technology allows for the visualization of the degree of vascularization and angiogenesis in the affected tissue. These are the reasons MSUS is considered an innocuous imaging method which works without radiation, that is less costly and more accessible than most other imaging technologies. A series of studies show the relevance of MSUS for the detection of morphostructural changes suggestive of MSU deposits characteristically found in gout. The ultrasonographic signs related to said deposits are hyperechoic enhancement of the superficial margin of the hyaline cartilage, better known as the double contour sign, widening of the joint cavity, aggregates, tophi, and erosions. Wright et al compared MSUS´ and conventional radiography's capacity to detect erosions secondary to gout on the first metatarsophalangeal joint of 78 patients. MSUS proved to be superior in that study.
In previous studies, our group has observed the presence of morphostructural changes suggestive of MSU deposits in individuals with asymptomatic hyperuricemia using MSUS. The change observed in the joints was similar to that of patients with a gout diagnosis. The main findings were hyperechoic enhancement of the superficial margin of the hyaline cartilage (double contour sign) on the femoral cartilage and first metatarsophalangeal joint, intraarticular tophi, as well as patellar and Achilles enthesopathy. These results have since been replicated even in animal models, supporting that asymptomatic hyperuricemia induces morphostructural changes in different tissues (hyaline cartilage, entheses, tendons and subchondral bone) before leading to an acute gout attack or an episode of urolithiasis.
Recently, our group investigated a possible association between morphostructural changes suggestive of MSU deposits and the elevation of inflammation markers in individuals with asymptomatic hyperuricemia. For this purpose, three groups were studied: the first made up of individuals with asymptomatic hyperuricemia, the second formed by patients with chronic gout, and the third comprised of normouricemic individuals as a control group. All participants got an MSUS of the knee, ankle and first metatarsophalangeal joint in search for morphostructural changes suggestive of MSU deposits. The serum concentrations of IL-1β, IL-2, IL-4, IL-5, IL-6, IL- 10, IL-12, IL-13, interferon -γ(INF) and tumoral necrosis factor (TNF) were measured in all the participants. The levels of the following chemokines IL-8 also known as C-X-C Motif chemokine ligand 8 (CXCL8), monocyte chemoattractant protein 1 (MCP-1) also known as C-C Motif Chemokine Ligand 2 (CCL2) and epithelial-derived neutrophil-activating peptide 78 (ENA-78) also known as C-X-C Motif chemokine ligand 5 (CXCL5), and microRNA(miR) miR-146a, miR-155 y miR-223 were also quantified.
In this study, the investigators found that individuals with asymptomatic hyperuricemia present similar levels of cytokines and chemokines as those observed in patients with gout; more notably the serum concentration of IL-6, IL-8 and miR-155 were significantly higher in both groups when compared to the normouricemic controls. Also, a significant relation between presence of MSU crystals (independent of urate acid levels) and higher levels of IL-6, IL-8 and miR-155 was found. This is the first study to suggest that the presence of MSU deposits (detected by MSUS) are a marker of inflammatory activity independent of the existence or lack of previous gouty arthritis episodes.
The elevated levels of inflammatory cytokines, chemokines and microRNA in individuals with asymptomatic hyperuricemia makes questioning the need for pharmacological treatment in this group even more relevant.
The more knowledge is gained on the beginning and progression of atherosclerotic heart disease, the more evident it becomes that local and systemic inflammatory processes are associated.
Chronic, systemic inflammation can be evidenced by different premature immunosenescence phenomena, among them the loss of expression of the co-signalizing Cluster of Differentiation 28(CD 28) molecule from T CD4 + lymphocytes is of particular interest. The percentage of Cluster of Differentiation 4 that lack the expression of Cluster of Differentiation 28 (CD4+ CD28null) is a relievable marker that is sensible to change of chronic inflammation and atherosclerotic damage.
As a matter of fact, the presence of activated systemic inflammatory pathways could be the etiopathogenic bond that unites a persistent elevation of urate serum concentration with the development of accelerated atherosclerosis and adverse cardiovascular events including coronary artery disease. By this logic, individuals with asymptomatic hyperuricemia with evidence of MSU articular deposits are the ones that could benefit from hypouricemic treatment since this would lower local and systemic inflammation.
A score which can be used to predict the risk of myocardial infarction or stroke (QRISK3). The variables it uses are age, gender, ethnicity, tobacco consumption, previous diagnostic of diabetes, chronic kidney disease, rheumatoid arthritis, systemic lupus erythematosus or severe psychiatric disease; family history of angina or myocardial infarction before 60 years of age, use of drugs for erectile disfunction, antihypertensives, atypical antipsychotics or regular use of steroids, and body mass index. Its algorithm provides four results: 10-year risk given as a percentage, the result a healthy person of the same age, gender and ethnicity would get, relative risk, and the age at which a healthy individual would have the same risk as the patient.
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Musculoskeletal Degeneration, Inflammation, Hyperuricemia
Keywords
allopurinol, ultrasound, morphostructural changes
7. Study Design
Primary Purpose
Treatment
Study Phase
Phase 3
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
N/A
Enrollment
200 (Anticipated)
8. Arms, Groups, and Interventions
Arm Title
allopurinol
Arm Type
Experimental
Arm Description
150 mg daily for a month then 300 mg daily for the rest of the study (5 months)
Intervention Type
Drug
Intervention Name(s)
Allopurinol Pill
Other Intervention Name(s)
Zyloprim
Intervention Description
Individuals who meet the inclusion criteria and also have morphostructural changes suggestive of MSU crystal deposits in their MSUS will start treatment with allopurinol at a dosage of 150 mg to be taken daily, orally for a month and then to be increased to 300 mg. The rest of the individuals' medication is not to be altered. If a participant presents hypersensitivity to allopurinol, they are to stop the medication and will be excluded from the investigation.
Three months after starting treatment, the participants will have a physical exam, confirm the continuation of the treatment (adjust dosage if needed) and take a blood sample for laboratory tests. Six months after treatment is started, the participants will be reevaluated by MSUS and have another blood sample taken, Once the study is finished, continuing or ending treatment with allopurinol will be decided by the medical judgment of the physician of each participant.
Primary Outcome Measure Information:
Title
inflammatory markers
Description
To measure changes in proinflammatory cytokines (Interleukin 1ß (IL-1ß))
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in proinflammatory cytokines (Tumor Necrosis Factor)
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in proinflammatory cytokines (Interleukin 6 (IL-6))
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in proinflammatory cytokines (Interferon-γ)
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in proinflammatory cytokines (Interleukin 18 (IL-18))
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in proinflammatory cytokines (Interleukin 17 (IL-17))
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in chemokines (Interleukin 8 (IL-8))
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in chemokines (monocyte chemoattractant protein 1 (MCP-1))
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in microRNAs (miR) (miR-155)
Time Frame
6 months
Title
inflammatory markers
Description
To measure changes in the percentage of Cluster of Differentiation 4 cells that lack the expression of Cluster of Differentiation 28 (CD4+CD28null)
Time Frame
6 months
Secondary Outcome Measure Information:
Title
musculoskeletal ultrasound
Description
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Double contour sign is a hyperechoic abnormal band over the superficial margin of articular hyaline cartilage, independent from insonation angle which can be regular or irregular, continuous or intermittent and that distinguishes itself from the cartilage interphase sign)
Time Frame
6 months
Title
musculoskeletal ultrasound
Description
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Tophi are described, independent of location, as an heterogenous, circumscript aggregate, hyper- and/or hypoechoic, which can be surrounded by a small anechoic halo and can have a posterior acoustic shadow)
Time Frame
6 months
Title
musculoskeletal ultrasound
Description
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Aggregates are described, independent of location, as heterogenous hyperechoic foci which maintain a high degree of reflectivity even when gain is reduced to the minimum or when the insonation angle is changed, also they can sometimes create a posterior acoustic shadow)
Time Frame
6 months
Title
musculoskeletal ultrasound
Description
Presence of the ultrasonographic elemental lesions caused by monosodium urate crystals: (Erosions are described as a discontinuation of the bone surface, seen in two perpendicular planes)
Time Frame
6 months
10. Eligibility
Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria:
Individuals with two urate determinations >7 mg/dL in the last year and no clinical sign, past or present, suggestive of joint inflammation (acute gout attack), urolithiasis or uric acid nephropathy
Over 18 years of age
Residents of Mexico City or its metropolitan area
Individuals with a signed informed consent form for the participation in the clinical trial
Exclusion Criteria:
Individuals with joint inflammation suggestive of gout during the clinical evaluation
Patients without elemental ultrasonographic lesions (double contour sign, aggregates, tophi) on the first metatarsophalangeal joint, knee, ankle or the tendons of the quadriceps, patella, and calcaneus when evaluated by MSUS
Patients taking thiazides
Patients with history of stroke or coronary artery disease in the last year
Patients with osteoarthritis be it by clinical presentation or imaging
Pregnant women
Neoplasms
Known Hepatitis B Virus (HBV), Hepatitis C Virus (HCV) , Human immunodeficiency Virus (HIV) infection, or any other know active infections
Autoimmune or autoinflammatory disease
Allopurinol hypersensitivity or allergy
Deteriorated kidney function (Glomerular Filtration Rate (GFR) <50 mL/min/1.73m^2)
Patients taking azathioprine
Functional New York Heart Association (NYHA) score of II or more
Central Contact Person:
First Name & Middle Initial & Last Name or Official Title & Degree
Luis M Amezcua-Guerra, MD
Phone
55732911
Ext
21310
Email
lmamezcuag@gmail.com
First Name & Middle Initial & Last Name or Official Title & Degree
Carlos Pineda, MD
Phone
59991000
Ext
12126
Email
carpineda@yahoo.com
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Luis M Amezcua-Guerra, MD
Organizational Affiliation
Instituto Nacional de Cardiologia Ignacio Chavez
Official's Role
Principal Investigator
Facility Information:
Facility Name
Instituto Nacional de Cardiología
City
Mexico City
ZIP/Postal Code
14080
Country
Mexico
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Luis M Amezcua-Guerra, MD
Phone
55732911
Ext
21310
Email
lmamezcuag@gmail.com
First Name & Middle Initial & Last Name & Degree
Carlos Pineda, MD
Phone
59991000
Ext
12126
Email
carpineda@yahoo.com
First Name & Middle Initial & Last Name & Degree
Luis M Amezcua-Guerra, MD
First Name & Middle Initial & Last Name & Degree
Carlos Pineda, MD
First Name & Middle Initial & Last Name & Degree
Karen Hopf, MD
First Name & Middle Initial & Last Name & Degree
Melisa Valdivieso, MD
First Name & Middle Initial & Last Name & Degree
Luis H Silveira, MD
First Name & Middle Initial & Last Name & Degree
Marwin Gutierrez, MD
First Name & Middle Initial & Last Name & Degree
Fausto Sánchez, PhD
First Name & Middle Initial & Last Name & Degree
Jessica Gutiérrez, MD
First Name & Middle Initial & Last Name & Degree
Ricardo Márquez, PhD
First Name & Middle Initial & Last Name & Degree
Felipe Massó, MD
Facility Name
National Institute of Cardiology Mexico
City
Mexico City
ZIP/Postal Code
14080
Country
Mexico
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Luis M Amezcua Guerra, MD
Phone
52555573
Ext
21310
Email
lmamezcuag@gmail.com
12. IPD Sharing Statement
Plan to Share IPD
No
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Effects of Allopurinol on Inflammation and Ultrasonographic Changes in People With Elevated Uric Acid But no Symptoms
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