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Study to Evaluate Safety and Tolerability, Pharmacodynamic Effects and Exploratory Efficacy of a Vaccine Against Essential Hypertension

This study has been completed.
Information provided by:
Cytos Biotechnology AG Identifier:
First received: June 18, 2008
Last updated: December 1, 2009
Last verified: December 2009

CYT006-AngQb is a vaccine that induces a B-cell mediated immune response characterized by the generation of specific antibodies (IgG and IgM) against Angiotensin II. The vaccine is administered by subcutaneous injection.

The objectives of the study are:

  • To evaluate safety and tolerability of 5 s.c. injections of 300µg CYT006-AngQb with Alhydrogel™ in patients with mild to moderate essential hypertension (hypertension Grade I and II).
  • To assess pharmacodynamic effects, i.e. anti-Ang II immune response and renin- angiotensin system (RAS) biomarkers.
  • To explore the effect on blood pressure using ABPM.

Condition Intervention Phase
Biological: CYT006-AngQb
Biological: Placebo
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Double Blind, Randomized, Placebo Controlled, Parallel Group Phase IIa Study to Evaluate Safety and Tolerability, Pharmacodynamic Effects and Exploratory Efficacy of an Anti-Angiotensin II Vaccine (CYT006-AngQb) in Patients With Mild to Moderate Essential Hypertension

Further study details as provided by Cytos Biotechnology AG:

Primary Outcome Measures:
  • Adverse events: quality, quantity, severity [ Time Frame: Throughout the study until week 48 ]

Secondary Outcome Measures:
  • Change in daytime, nighttime and 24-hour ambulatory blood pressure from baseline [ Time Frame: 24 hours ]
  • Titer of IgG specific for angiotensin II [ Time Frame: Throughout the study untill week 48 ]
  • Amount of RAS-Biomarkers (plasma renin concentration, angiotensin II, aldosterone) [ Time Frame: 24 hours ]

Estimated Enrollment: 60
Study Start Date: March 2008
Study Completion Date: November 2009
Primary Completion Date: March 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1 Biological: CYT006-AngQb
Placebo Comparator: 2 Biological: Placebo


Ages Eligible for Study:   18 Years to 69 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients with mild to moderate essential hypertension (Grade I and Grade II) with mean sitting office SBP =140-179 mmHg and/or mean sitting office DBP = 90-109 mmHg on 2 consecutive visits (screening and V1).
  • Daytime blood pressure above threshold for definition of hypertension in the screening ABPM measurement (SBP >135 mmHg).
  • Patients without current antihypertensive therapy.
  • Patients on antihypertensive therapy, which can be stopped.
  • 18 to 69 years of age.
  • Male patients, or female patients without childbearing potential .

Exclusion Criteria:

  • Patients with "very high added risk" according to 2007 Guidelines for the Management of Arterial Hypertension (Journal of Hypertension, 2007, 25:1105-1187), i.e. those with:
  • grade III hypertension (mean sitting office SBP ≥180mmHg and/or mean sitting DBP≥110mmHg)
  • history or presence of established cardiovascular or renal disease:
  • Ischemic stroke, cerebral hemorrhage, transient ischemic attack
  • Myocardial infarction, angina pectoris, coronary re-vascularization, heart failure
  • Peripheral artery disease
  • Diabetic nephropathy
  • Known autoimmune disease.
  • Severe allergy.
  • Pregnancy or breastfeeding.
  • Women in childbearing age that are not surgically sterilized.
  • Patients with a history or current positive test for HIV infection, AIDS, or other immunosuppressive disorders; hepatitis B or C.
  • Current diagnosis or history of malignancy.
  • Presence of suspicious lymphadenopathy or splenomegaly on physical examination.
  • Drug or alcohol abuse within the past 2 years.
  • Presence or history of relevant cardiovascular, renal, hepatic, pulmonary, endocrine, autoimmune, neurological and psychiatric disease as judged by the investigator.
  • Any current or past disease or conditions (physical or mental) that would, in the opinion of the investigator, interfere with the study procedures or interpretation of the study data (e.g. workers in the night shift).
  • Previous participation in a clinical trial with a Qb based vaccine.
  • Use of an investigational drug within 3 months before enrolment, or planned use during the whole study period.
  • Possible dependency of the patient on sponsor and/or investigator.
  • Planned active immunization 2 weeks before or 2 weeks after any study medication vaccination.
  • Donation or loss >=400 mL of blood within 8 weeks prior to dosing or major surgery within past 2 months.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00701649

CRS Mannheim
Mannheim, Germany, D-68167
CRS Mönchengladbach
Mönchengladbach, Germany, D-41061
University Hospital Basel
Basel, Switzerland, CH-4031
Bern, Switzerland, CH-3010
Hopital Universitaire Geneve
Geneva, Switzerland, CH-1211
Med Zentrum Römerhof
Zürich, Switzerland, CH-8091
Sponsors and Collaborators
Cytos Biotechnology AG
  More Information

Responsible Party: Prof. Dr. med. Jürg Nussberger, Hôpital Nestlé 6027, CHUV, CH-1011 Lausanne, Switzerland Identifier: NCT00701649     History of Changes
Other Study ID Numbers: CYT006-AngQb 02
Eudract No. 2007-005843-93
Study First Received: June 18, 2008
Last Updated: December 1, 2009

Keywords provided by Cytos Biotechnology AG:
mild essential hypertension
moderate essential hypertension

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases processed this record on April 26, 2017