Study of Efficacy of Metformin in the Treatment of Acanthosis Nigricans in Children With Obesity

NCT ID: NCT02438020

Last Updated: 2015-05-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

PHASE4

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-06-30

Study Completion Date

2016-10-31

Brief Summary

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Obesity is often accompanied by insulin resistance and/or hyperinsulinemia. Acanthosis nigricans (AN) is a skin condition commonly present on the neck of obese children. Metformin is a useful drug for conditions characterized by insulin resistance.The aim of this study is to compare the efficacy of metformin versus placebo on AN lesions of the neck as well as their effects on metabolic and anthropometric variables in a sample of obese children. This is a 12-week randomized, double-blind randomized trial involving obese children with AN to receive either metformin or placebo.

Evaluations will be performed every three weeks. Clinical, histological and colorimetric assessments of AN lesions will be compared initially and at the conclusion of the study.

Detailed Description

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Acanthosis nigricans (AN) are lesions affecting localized areas of the skin in persons with obesity and/or hyperinsulinemia. Roughening of the skin is related with histological papillomatosis and the skin darkening is due to hyperkeratosis. Biochemical mechanisms for developing this hyperplastic lesion involve local cutaneous growth factors. Nearly 40% of Native American teenagers have acanthosis nigricans, whereas about 13% of African American, 6% of Hispanic, and less than 1% of white, non-Hispanic children aged 10-19 have clinically apparent acanthosis nigricans. AN is a clinical surrogate of laboratory-documented hyperinsulinemia.

The aim of this study is to compare the efficacy of metformin versus placebo on AN lesions of the neck as well as their effects on metabolic (HOMA, triglycerides, cholesterol) and anthropometric variables (BMI, waist) in a sample of obese children. This is a 12-week randomized, double-blind randomized trial involving obese children with AN to receive either metformin or placebo.

Evaluations will be performed every three weeks. Clinical, histological and colorimetric assessments of AN lesions will be compared initially and at the conclusion of the study. Burke´s scale, papillomatosis and hyperkeratosis, and the L\* axis of will be used to measure the AN improvement.

Conditions

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Acanthosis Nigricans

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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Metformin

500 mg metformin oral intake before main meal

Group Type EXPERIMENTAL

Metformin

Intervention Type DRUG

One tablet of 500 mg will be ingested before the main meal

Placebo

Placebo tablet before main meal.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

A placebo tablet will be ingested daily before main meal.

Interventions

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Metformin

One tablet of 500 mg will be ingested before the main meal

Intervention Type DRUG

Placebo

A placebo tablet will be ingested daily before main meal.

Intervention Type OTHER

Other Intervention Names

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Glucophage Glumetza Fortamet Riomet

Eligibility Criteria

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Inclusion Criteria

* Signed informed consent from children and parents.
* Children younger than 18 years.
* Clinical diagnosis of acanthosis nigricans.
* Obesity.

Exclusion Criteria

* Diabetes mellitus.
* Neurological diseases.
* Congenital diseases.
* Oral treatment for obesity in the last two months.
* Topical treatment for the last two months.
Minimum Eligible Age

8 Years

Maximum Eligible Age

17 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Hospital Central "Dr. Ignacio Morones Prieto"

OTHER

Sponsor Role collaborator

Juan Pablo Castanedo-Cazares

OTHER

Sponsor Role lead

Responsible Party

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Juan Pablo Castanedo-Cazares

Dermatology research director

Responsibility Role SPONSOR_INVESTIGATOR

Principal Investigators

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Bertha Torres-Alvarez, MD

Role: STUDY_CHAIR

Hospital Central "Dr. Ignacio Morones Prieto"

Juan P Castanedo-Cazares, MD

Role: STUDY_DIRECTOR

Hospital Central "Dr. Ignacio Morones Prieto"

Francisco Goldaracena-Orozco, MD

Role: PRINCIPAL_INVESTIGATOR

Hospital Central "Dr. Ignacio Morones Prieto"

Locations

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Hospital Central Dr.Ignacio Morones Prieto

San Luis Potosí City, San Luis Potosí, Mexico

Site Status

Countries

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Mexico

Central Contacts

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Juan P Castanedo-Cazares, MD

Role: CONTACT

524448342795

Francisco Goldaracena-Orozco, MD

Role: CONTACT

524448342795

References

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Bellot-Rojas P, Posadas-Sanchez R, Caracas-Portilla N, Zamora-Gonzalez J, Cardoso-Saldana G, Jurado-Santacruz F, Posadas-Romero C. Comparison of metformin versus rosiglitazone in patients with Acanthosis nigricans: a pilot study. J Drugs Dermatol. 2006 Oct;5(9):884-9.

Reference Type BACKGROUND
PMID: 17039655 (View on PubMed)

Freemark M, Bursey D. The effects of metformin on body mass index and glucose tolerance in obese adolescents with fasting hyperinsulinemia and a family history of type 2 diabetes. Pediatrics. 2001 Apr;107(4):E55. doi: 10.1542/peds.107.4.e55.

Reference Type BACKGROUND
PMID: 11335776 (View on PubMed)

Romo A, Benavides S. Treatment options in insulin resistance obesity-related acanthosis nigricans. Ann Pharmacother. 2008 Jul;42(7):1090-4. doi: 10.1345/aph.1K446. Epub 2008 May 20.

Reference Type BACKGROUND
PMID: 18492785 (View on PubMed)

Other Identifiers

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MET-AN

Identifier Type: -

Identifier Source: org_study_id

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