Assessment of Biological and Biometrological Parameters in Adult Subjects with Androgenetic Alopecia

Pierre Fabre

Status

Terminated

Conditions

Healthy

Alopecia, Androgenetic

Treatments

Other: Biological sampling

Other: Biometrological measurements

Study type

Interventional

Funder types

Industry

Identifiers

NCT06854432

INTERALOPECIE

Details and patient eligibility

About

Androgenetic alopecia is a chronic pathology affecting approximately 50% of men at 50 years old and is characterized by a progressive miniaturization of the hair follicle leading to a localized baldness.

Although it has been shown that testosterone metabolism plays a central role in this pathology, targeting this biological pathway is not fully efficient to treat androgenetic alopecia, suggesting that other factors are involved, notably factors linked to the perifollicular environment. Moreover, the very specific pattern of androgenetic alopecia is not yet fully understood: the occipital and lower temporal areas of the scalp are always preserved. Once the hair follicle has disappeared, it is not possible to make it grow back, it is then important to provide a treatment that slows down the progression of androgenetic alopecia at the earliest stage of the pathology, and that specifically targets the affected area.

The aim of this study is to better understand androgenetic alopecia pathophysiology by a multi-omic approaches and biometrological analysis, in the same study, on the local ecosystem of bald scalp areas and non-bald scalp areas of adult with androgenetic alopecia, compared to scalp of adult without androgenetic alopecia.

Enrollment

46 patients

Sex

Male

Ages

30 to 50 years old

Volunteers

Accepts Healthy Volunteers

Inclusion and exclusion criteria

Selection criteria:

Criteria related to the population:

Male
Subject aged between 30 and 50 years included

Criteria related to the scalp condition:

Subject with hair length over 3 cm
Subject presenting a negative pull test result

Specific for non-AGA group:

• Non-alopecic men with full head of hair with uniform scalp coverage (homogeneous hair density on the vertex, occiput, left and right parietal areas)

Specific for AGA group:

• Androgenetic alopecic men with progressive AGA for more than 5 years: stage between III to IV included according to the Hamilton's classification modified by Norwood

Non-selection criteria:

Criteria related to the population:

Subject having received on study areas artificial UV exposure, excessive or prolonged exposure to natural sunlight within 2 months before the selection visit
Subjects with frizzy hair

Criteria related to diseases:

Subject having neoplastic disease (history of disease or disease on-going)
Subject having severe acute progressive disease (infectious syndromes, inflammatory, COVID-19, acute fever...) occurred within the last 3 months before the selection visit liable to interfere with the study assessments
Subject with iron deficiency on-going, not treated or treated for less than 3 months before the selection visit
Subject having a dermatological condition, an acute, chronic or progressive disease or history of disease liable to interfere with the study data or considered by the investigator hazardous for the subject or incompatible with the study requirements

Specific for non-AGA group:

Subject with any type of alopecia
Subject with family history of androgenetic alopecia in the father with stage ≥ III according to the Hamilton's classification modified by Norwood

Specific for AGA group:

• Subject with non-androgenetic alopecia (Cicatricial alopecia, Alopecia aerata...)

Criteria related to procedures, treatments, products and/or hair care routine:

Radiotherapy, chemotherapy
Scalp surgery
Systematic or local androgenetic alopecia treatment or product, taken or applied for more than 4 consecutive weeks during the last 6 months before the selection visit
Any following hair care within the last 3 months before the selection visit: dyeing, bleaching, perm
Systemic or local non-steroidal anti-inflammatory drug taken or applied on the scalp for more than 1 week during the last month (systematic NSAIDs) or 2 weeks (local NSAIDs) before the selection visit

Non-inclusion criteria:

Criteria related to the population:

Subject having received on study areas artificial UV exposure, excessive or prolonged exposure to natural sunlight between selection and inclusion visit

Criteria related to the disease:

• Subject with any adverse event occurring between selection and inclusion visit liable to interfere with the study assessments

Criteria related to treatments and/or products:

• Any procedures, treatments, products and/or hair care taken, applied or performed between selection and inclusion visit liable to interfere with the study assessments