Aczone Gel 7.5% in the Treatment of Acne Vulgaris in Patients With Skin of Color

Acne vulgaris is a common skin disease characterized by inflammatory papules, pustules, and comedones that is prevalent in men and women of color. In fact, acne is the most common dermatologic diagnosis made in SOC populations. Although individuals of all skin types can develop acne vulgaris, there are important differences in darker skin types that are important to consider when choosing an optimal treatment.

Complications from acne are of great concern in this population, as keloids, hypertrophic scars, and post-inflammatory hyperpigmentation (PIH) are more common in skin of color. PIH may last for weeks to months and, in many cases, is more troublesome to patients than the acne itself. Overall, facial acne and its sequelae have a greater impact on perception of appearance, negative emotions, and social functioning in women of color than white women.

Dapsone is a sulfone compound with anti-inflammatory properties that has been shown to be effective in the treatment of acne vulgaris in SOC. Aczone ® (dapsone) gel, 5% administered twice daily has been associated with significant improvement in overall acne severity, acne signs, and impact on quality of life in women of color. Two phase III trials of a newer formulation of Aczone ® (dapsone) gel, 7.5% used once daily demonstrated that this product is effective, safe, and well-tolerated for the treatment of acne in both men and women; however, limited data is available regarding its efficacy and safety in SOC.

Further, some investigators of the phase IV study on the safety and efficacy of dapsone gel 5% in SOC anecdotally reported improvement in hyperpigmentation over 12 weeks, although this was not a planned efficacy outcome. Further research is needed on the potential effects of dapsone gel on hyperpigmentation and PIH in SOC.

The current study will investigate the therapeutic impact of Aczone gel 7.5% in SOC males and females ages 18 and older with acne vulgaris. The study will also evaluate the impact of Aczone gel on post-inflammatory hyperpigmentation using the Postacne Hyperpigmentation Index (PAHPI) and mexameter-measured melanin index (MI).

Inclusion criteria

• Provide written, signed and dated informed consent prior to initiating any study-related activities.
• Male or female subjects who are ≥ 18 years of age
• Subjects with Fitzpatrick Skin Type IV, V, or VI
• Subjects with moderate to severe acne as defined by investigator- assessed Global Acne Assessment Score (GAAS) of 3 or 4 at screening
• Facial acne vulgaris with 20 to 50 (inclusive) inflammatory lesions and 30 to 100 (inclusive)non inflammatory lesion
• Stable non-progressive or regressive acne vulgaris in the investigator's opinion
• Females of childbearing potential (FCBP) must have a negative pregnancy test at Screening and Baseline. A female is considered not to be of childbearing potential if she is post-menopausal with at least 12 consecutive months of amenorrhea or has undergone surgical sterilization. While on investigational product and for at least 28 days after taking the last dose of investigational product, FCBP who engage in activity in which conception is possible must use one of the approved contraceptive options described below:

Option 1: Any one of the following highly effective methods: hormonal contraception (oral, injection, implant, transdermal patch, vaginal ring); intrauterine device (IUD); tubal ligation; or partner's vasectomy; OR Option 2: Male or female condom (latex condom or nonlatex condom NOT made out of natural [animal] membrane [for example, polyurethane]; PLUS one additional barrier method: (a) diaphragm with spermicide; (b) cervical cap with spermicide; or (c) contraceptive sponge with spermicide.

• Must be in general good as judged by the Investigator
• Subject is willing to avoid excessive or prolonged exposure of the treated skin to ultraviolet light (i.e. sunlight, tanning beds) throughout the study
• Subject is willing to follow study instructions and complete study assessments without assistance and is likely to complete all required visits

Exclusion criteria

• Diagnosis of other dermatologic diagnosis that, in the opinion of the investigator, would interfere with diagnosis, examination, or treatment of the studied condition (i.e. psoriasis, atopic dermatitis, lupus, dermatomyositis, seborrheic dermatitis, perioral dermatitis, etc.)
• Subjects with severe cystic acne, acne conglobate, acne fulminans, or secondary acne (chloracne or drug-induced acne)
• Uncontrolled systemic disease(s) that, in the opinion of the investigator, would put the patient at significant risk if enrolled in the study or would interfere with subject's participation in the study
• Subjects with a history of clinically significant hemolysis, anemia, or enteritis (regional enteritis, ulcerative colitis, pseudomembranous colitis, antibiotic-associated colitis)
• Subjects with allergy or sensitivity to the study drug or its components
• Subjects who have not complied with the proper wash-out periods:

• Topical anti-inflammatory medications, salicylic acid, corticosteroids, antibiotics, antibacterials, peroxide-containing products, or retinoids within 2 weeks of baseline
• Systemic antibiotics, corticosteroids, antimalarials or oral dapsone within 4 weeks of baseline Other anti-acne medication, including isotretinoin or spironolactone, within 6 months of baseline
• Chemical peels or other facial acne procedures (laser therapy, light therapy) within 3 months of baseline
• Treatment with botulinum toxin of any serotype in the face within 6 months of baseline
• Estrogens/Birth control pills must have been started ≥ 90 days prior to baseline and use must be continued during the study without alteration or discontinuation.
• Pregnant or breast feeding.
• Subjects with evidence of alcohol or substance abuse.
• Use of any investigational drug within 4 weeks prior to randomization, or 5 pharmacokinetic/pharmacodynamic half-lives, if known (whichever is longer).