This is a phase II a, double-blind, randomized, parallel-design, four-week study to investigate the efficacy, safety and tolerability of two different doses of SPP635 in type II diabetic patients with mild to moderate hypertension and albuminuria.

The total study duration for patients completing the entire study will be approximately 7 weeks including a 2 weeks Screening Phase, 1 week Wash-out Phase, 4 week Treatment Phase and 1 week Follow-up Phase.

All treatments other than certain antihypertensive drugs (which are to be washed-out) with an effect on BP and all antidiabetic treatments must be kept at stable dose during the whole study.

A maximum of 50 patients in total is planned to be enrolled.

Inclusion Criteria:

• men or women, 18 to 75 years
• hypertension
• diabetes mellitus type II
• albuminuria

Exclusion Criteria:

• donation of blood in the past month
• significant illness
• history of malignancy
• Heart failure, stroke, myocardial infarction, transient ischaemic attack, or hypertensive encephalopathy within the past 6 months
• Current or past history of clinically significant electrocardiogram (ECG) abnormalities such as permanent 2nd degree atrioventricular (AV) block or higher, unstable angina, percutaneous transluminal coronary angioplasty (PTCA), coronary artery bypass graft (CABG) or cerebrovascular accident in the last three months