This study will assess the safety and pharmacokinetics of GSK573719 and GSK573719/vilanterol combination in healthy subjects and subjects with moderate hepatic impairment. The results of this study will provide guidance on the use of the product in patients with hepatic impairment.

GSK573719 is being developed as a monotherapy and in combination with vilanterol for the treatment of Chronic Obstructive Pulmonary Disease (COPD). This study will assess the pharmacokinetics and safety of inhaled GSK573719/ vilanterol (VI) and GSK573719 in healthy subjects and in subjects with moderate hepatic impairment. Nine subjects with moderate hepatic impairment will be recruited, together with nine matched healthy volunteers.

There is a possibility that when used by patients with impaired hepatic function the pharmacokinetics of inhaled GSK573719 or GSK572719/VI may be altered. The results of this study will therefore provide guidance on the use of GSK573719 and GSK573719/VI in moderate hepatically impaired patients.

Inclusion Criteria:

• Male or female between 18 and 70 years of age inclusive, at the time of signing the informed consent.
• 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 Child-bearing potential and is abstinent or agrees to use one of the contraception methods listed in the protocol

• Body weight of greater than or equal to 45 kg and body mass index within the range 18 - 33 kg/m2 (inclusive).
• Single QTcF less than 450 msec; or QTc less than 480 msec in subjects with Bundle Branch Block.
• Capable of giving written informed consent, which includes compliance with the requirements and restrictions listed in the consent form Healthy Subjects
• ALT, alkaline phosphatase and bilirubin less than or equal to 1.5x Upper Limit of Normal (ULN)
• Healthy as determined by a responsible and experienced physician Hepatically Impaired Subjects
• Moderately hepatically impaired - subjects must have a known medical history of liver disease with or without a known history of alcohol abuse, and a Child-Pugh score of 7-9 points
• Subjects with no significant abnormality, apart from impaired hepatic function and related symptoms, or clinical examination.

Exclusion Criteria:

• Suffered a lower respiratory tract infection in the 4 weeks before the screening visit.
• A supine mean heart rate outside the range 40-90 beats per minute (BPM) at screening.
• A positive pre-study drug/alcohol screen.
• A positive test for HIV antibody.
• The subject has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer).
• Exposure to more than four new chemical entities within 12 months prior to the first dosing day.
• 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.
• Where participation in the study would result in donation of blood or blood products in excess of 500 mL within a 56 day period.
• Pregnant females as determined by positive serum or urine hCG test at screening or prior to dosing.
• Lactating females
• Subjects with smoking history of greater than 10 cigarettes per day or regular use of tobacco- or nicotine-containing products, within 6 months prior to screening.
• Unwillingness or inability to follow the procedures outlined in the protocol.
• Subject is mentally or legally incapacitated.
• Unable to refrain from consumption of red wine, seville oranges, grapefruit or grapefruit juice and/or pummelos, exotic citrus fruits, grapefruit hybrids or fruit juices from 7 days prior to the first dose of study medication.
• The subject is unable to use the novel dry powder inhaler correctly Healthy Subjects
• Subjects with any predisposing condition that might interfere with the absorption, distribution, metabolism or excretion of drugs or any previous gastrointestinal (GI) surgery condition which the investigator considers sufficiently significant to interfere with the conduct, completion, or results of this trial or constitutes an unacceptable risk to the subject.
• A positive pre-study Hepatitis B surface antigen or positive Hepatitis C antibody result within 3 months of screening
• Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones)
• History of regular alcohol consumption within 6 months of the study defined as: an average weekly intake of greater than 21 units for males or 14 units for females
• Unable to refrain from the use of prescription or non-prescription drugs, including vitamins, herbal and dietary supplements (including St John's Wort) within 7 days (or 14 days if the drug is a potential enzyme inducer) or 5 half-lives (whichever is longer) prior to the first dose of study medication

Hepatically impaired subjects:

• If in the opinion of the examining physician, an unstable cardiovascular, renal, pulmonary, endocrine, metabolic, neurological, haematological or gastrointestinal condition is present or any other significant medical condition which the investigator considers sufficiently serious to interfere with the conduct, completion, or results of this trial or constitutes an unacceptable risk to the subject.
• Severe ascities (Child-Pugh ascites score of 3) upon clinical exam, including physical exam and abdominal ultrasound at screening. Subjects identified to have moderate ascities by ultrasound examination may be included at the discretion of the Investigator with prior agreement from the sponsor.
• History of oesophageal bleeding within the last 6 months before dosing.
• Significant hepatic encephalopathy, degree of CNS impairment or other signs of hepatic function deterioration which the investigator considers sufficiently serious to interfere with the informed consent, conduct, completion, or results of this trial or constitutes an unacceptable risk to the subject.
• Patients at risk of requiring a transfusion during the study period, or has haemoglobin less than 9 g/dL
• Evidence of current significant infection
• Subjects who develop symptoms such as infections or haemorrhage between screening and dosing must not be included in the study
• Fluctuating or rapidly deteriorating hepatic function
• Subjects with significant renal insufficiency as defined by estimated creatinine clearance of less than 50 ml/min, using the Cockcroft and Gault equation
• Subjects with a diagnosis of primary biliary disease such as cholestasis or sclerosing cholangitis
• Subjects who need to take any concomitant medication, either prescribed or overthe- counter, which may in the opinion of the Investigator, interfere in any way with the study procedure or be a safety concern. In particular subjects taking medications that significantly inhibit P450 CYP3A4 (e.g. ketoconazole) must not be included in this study
• Subjects who, within the past six months, have had a history of significant drug abuse or alcohol abuse.

Patient-level data for this study will be made available through www.clinicalstudydatarequest.com following the timelines and process described on this site.