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A Safety Study Of A Single Vaginal Administration Of P2G12 Antibody In Healthy Female Subjects

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01403792
Recruitment Status : Completed
First Posted : July 27, 2011
Last Update Posted : December 22, 2011
European Commission
Information provided by (Responsible Party):
University of Surrey

Brief Summary:
The purpose of this study is to assess the safety and tolerability of intravaginal administration of P2G12. 11 subjects will receive P2G12/placebo. Three subjects in Group 1 will receive up to 7mg of P2G12, or placebo. Three subjects in Group 2 will receive up to 14mg of P2G12, or placebo and five subjects in Group 3 will receive up to 28mg of P2G12, or placebo. A safety review will take place before subjects in Groups 2 and 3 receive study drug to determine if it is safe to proceed to the next dose of P2G12. Vaginal and cervical inspections will be performed to determine what effect, if any, the study drug has had on the site of administration. Adverse event data will be collected throughout the trial.

Condition or disease Intervention/treatment Phase
Human Immunodeficiency Virus Drug: P2G12 Phase 1

Detailed Description:

This is a phase I study in healthy women aged 18 to 50 years, which involves vaginal application of study drug P2G12 or placebo.

P2G12 is a monoclonal antibody (MAb) (a kind of protein), and belongs to a group of MAbs that can help to prevent and protect from HIV infection. Most of these MAbs have been produced using a system called Chinese Hamster Ovary cell (CHO-Cell) fermentation, e.g. C2G12. This method of production is very expensive and cannot produce enough MAbs on a scale required for the global market.

Unlike C2G12, P2G12 is manufactured from plants. It is hoped that plant manufacture of such MAbs may offer some solutions to the high cost and low output of CHO-cell fermentation.

This study is designed to confirm the safety of a vaginally delivered MAb (P2G12) derived from plants and manufactured to Good Manufacturing Practice (a quality standard used for the manufacture of medicinal products).

11 subjects will be enrolled consecutively in cohorts (groups); in each successive cohort a higher dose of study drug will be administered, as well as placebo. The dose range is from up to 7 to up to 28mg of P2G12 in saline.

Subjects attend 7 visits over 13 weeks. At visit 3 subjects receive a single administration of study drug/placebo. Study visits include the following procedures: physical exam, vital signs, blood and urine samples, cervical smear test and colposcopy (medical examination of the cervix).

The relationship of adverse events (AEs) and serious adverse events (SAEs) to P2G12 administration, and abnormal laboratory test results as compared to baseline (pre-dose) values, will determine the safety of P2G12 in the study.

Levels of P2G12 in vaginal and serum samples will be measured at particular time-points in order to understand how quickly P2G12 is broken down by the body (pharmacokinetics) and whether any P2G12 is absorbed into the systemic circulation.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 11 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: A Double-Blind, Placebo-Controlled, Randomised, Dose-Escalation Phase I Safety Study Of A Single Vaginal Administration Of P2G12 Antibody In Healthy Female Subjects
Study Start Date : June 2011
Actual Primary Completion Date : November 2011
Actual Study Completion Date : November 2011

Resource links provided by the National Library of Medicine

MedlinePlus related topics: HIV/AIDS

Arm Intervention/treatment
Experimental: Up to 7mg P2G12 Drug: P2G12
A single intravaginal administration of 1ml P2G12/placebo.

Experimental: Up to 14mg P2G12 Drug: P2G12
A single intravaginal administration of 1ml P2G12/placebo.

Experimental: Up to 28mg P2G12 Drug: P2G12
A single intravaginal administration of 1ml P2G12/placebo.

Placebo Comparator: Placebo (saline solution) Drug: P2G12
A single intravaginal administration of 1ml P2G12/placebo.

Primary Outcome Measures :
  1. Occurrence, intensity and relationship to P2G12 administration of local and general adverse events (AEs) throughout the study period after drug administration. [ Time Frame: 35 days. ]

Secondary Outcome Measures :
  1. Changes in levels of P2G12 in blood and vaginal secretions as compared to baseline. [ Time Frame: 35 days ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • A female adult subject aged between 18 and 50 years old.
  • They are in good health as determined by medical history, physical examination and clinical judgement before entering into the study.
  • Subjects must agree to abstain from vaginal sexual intercourse for 72 hours before and after dosing.
  • Subject must agree not to undertake any vaginal practices during study participation other than receptive intercourse with a male, or use of sanitary tampons during menses. Use of condoms without spermicidal agents is encouraged.
  • Confirmation from the subject's GP that there is nothing in the subject's medical history that would prevent the subject from participating in the study.

Exclusion Criteria:

  • They have a known or suspected ongoing vaginal disease, malignancy or abnormality (including non-menstrual vaginal discharge) discovered at time of screening.
  • They have an abnormality, or non-menstrual discharge noted at screening colposcopy.
  • They present in the samples obtained at the screening visit:

    1. positive results for HIV 1 or 2 antibody.
    2. positive results for Hepatitis B sAg, anti-Hepatitis C antibody
    3. positive syphilis serology
    4. positive test for Neisseria gonorrhoea or Chlamydia trachomatis on urine or urethral swab sample
    5. abnormal cervical smear cytology
  • A clinically significant amount of protein or haemoglobin in the urine sample, determined by urine dipstick.
  • They have received any form of immunosuppressive or immunomodulatory (e.g. vaccines) therapy in the past 6 months.
  • They are receiving any medications via vaginal route.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01403792

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United Kingdom
Surrey Clinical Research Centre
Guildford, Surrey, United Kingdom, GU2 7XP
Sponsors and Collaborators
University of Surrey
European Commission
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Principal Investigator: Hubert A Bland, MBChB University of Surrey
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Responsible Party: University of Surrey
ClinicalTrials.gov Identifier: NCT01403792    
Other Study ID Numbers: CRC282
First Posted: July 27, 2011    Key Record Dates
Last Update Posted: December 22, 2011
Last Verified: December 2011
Keywords provided by University of Surrey:
Human Immunodeficiency Virus
Neutralising monoclonal antibody
Additional relevant MeSH terms:
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Acquired Immunodeficiency Syndrome
HIV Infections
Immunologic Deficiency Syndromes
Immune System Diseases
Blood-Borne Infections
Communicable Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Slow Virus Diseases
Genital Diseases
Urogenital Diseases