Japanese Phase 1 Study of GSK2585823

• Dermal irritancy (simple patch test) [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 22 days. ] [ Designated as safety issue: Yes ]
• Photo allergy and toxicity (Photo patch test) [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 22 days. ] [ Designated as safety issue: Yes ]

• • Photo-toxicity and photo-allergy potential (photopatch test) [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 22 days. ] [ Designated as safety issue: Yes ]
• • Safety and tolerability endpoints: adverse events, blood pressure, heart rate, 12-lead ECG, clinical laboratory safety tests [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 22 days. ] [ Designated as safety issue: Yes ]

This is a randomized, single-center, partial-blind study to evaluate the dermal irritation potential and to detect photo-toxicity and photo-allergy potential of GSK2585823, BPO 5% gel, BPO 3% gel, vehicle gel and negative control (distilled water) applied using Finn-Chambers by single and 7-day repeat patch test in 20 Japanese healthy male and female volunteers. Finn-Chambers containing no investigational product will be applied in the same manner.

Safety will also be assessed by measurement of vital signs, electrocardiograms (ECGs), safety laboratory data and review of adverse events.

• Drug: GSK2585823
  CLDM1%/BPO3%
• Drug: BPO 3%
  BPO 3%
• Drug: BPO 5%
  BPO 5%
• Other: Vehicle
  placebo

Inclusion Criteria:

1. Healthy as determined by a responsible and experienced physician, based on a medical evaluation including medical history, physical examination, laboratory tests and other tests. A subject with a clinical abnormality or laboratory parameters outside the reference range for the population being studied may be included only if the Investigator and the GSK Medical Monitor agree that the finding is unlikely to introduce additional risk factors and will not interfere with the study procedures.
2. Japanese healthy male and female subjects aged between 20 and 45 years of age inclusive, at the time of signing the informed consent.
3. AST, ALT and total bilirubin < ULN
4. Non-smorker (never smoked or not smoking for >6 months with <10 pack years history (Pack years = (cigarettes per day smoked/20) x number of years smoked)).
5. BMI within the range =>18.5 to < 25.0 kg/m2 at screening

6. A female subject is eligible to participate if she is of:

   • Non-childbearing potential defined as pre-menopausal females with a documented tubal ligation or hysterectomy; or postmenopausal defined as 12 months of spontaneous amenorrhea [in questionable cases a blood sample with simultaneous follicle stimulating hormone (FSH) > 40 MlU/ml and estradiol < 40 pg/ml (<147 pmol/L) is confirmatory].
   • Child-bearing potential and agrees to use one of the contraception methods from screening to the follow up examination.
7. Capable of giving written informed consent, which includes compliance with the requirements and restrictions listed in the consent form.
8. Single QTcB < 450 msec at screening

Exclusion Criteria:

1. A positive test for syphilis, Hepatitis B surface antigen or positive Hepatitis C antibody, HIV antibody and HTLV-1 result at screening.
2. A positive for urine drug screening.

3. History of regular alcohol consumption within 6 months of the study defined as:

   -an average weekly intake of >14 drinks for males or >7 drinks for females. One drink is equivalent to 12 g of alcohol: 350 mL of beer, 5 ounces (150 mL) of wine or 1.5 ounces (45 mL) of 80 proof distilled spirits.

4. The subject has participated in a clinical study with an investigational or a non-investigational drug or device during the previous 4 months.
5. The subject planned to concurrently participate in another clinical study or post-marketing study.
6. Use of prescription or non-prescription drugs, including vitamins, herbal and dietary supplements (including St John's Wort) within 7 days prior to the first application of study medication, unless in the opinion of the Investigator and GSK Medical Monitor the medication will not interfere with the study procedures or compromise subject safety.
7. History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the investigator or GSK Medical Monitor, contraindicates their participation.
8. The subject has donated a unit of blood ">400 mL" within the previous 4 months or ">200 mL" within the previous 1 month.
9. Pregnant females as determined by positive urine hCG test at screening or prior to dosing.
10. Lactating females.
11. Unwillingness or inability to follow the procedures outlined in the protocol.
12. Subject is mentally or legally incapacitated.
13. Subjects with clinically significant skin diseases which may contraindicate participation, or interfere with test site evaluations, including psoriasis, eczema, atopic dermatitis, acne, dysplastic nevi, or other skin pathologies.
14. Subjects with a history of hypersensitivity or idiosyncratic reaction to benzoyl peroxide, clindamycin, lincomycin or any study medication components or requiring significant concomitant medications or with diseases affecting evaluation of study medication
15. Subjects with scars, moles, other blemishes or tatoos, darkened skin or excessive hair on the utilised area of the mid or upper back which would interfere with grading the test sites
16. Within six months (oral) or 2 weeks (topical) prior to and during the study, subjects must not be treated with retinoids.
17. For one month (systemic) or 2 weeks (topical) before and during the study, subjects not to be treated with corticosteroids or any other medication that could interfere with study results.
18. Subjects with sunburn or suntan on test area of mid or upper back
19. Subjects with considerable exposure to sunlight, including sunlamps, on test area of mid or upper back
20. Subjects with inherent sensitivity to sun or history of photosensitivity