Influenza Vaccination in Patients With Scleroderma

The recruitment status of this study is unknown because the information has not been verified recently.
Verified August 2009 by Tel-Aviv Sourasky Medical Center.
Recruitment status was  Not yet recruiting
Sponsor:
Information provided by:
Tel-Aviv Sourasky Medical Center
ClinicalTrials.gov Identifier:
NCT01002508
First received: October 26, 2009
Last updated: NA
Last verified: August 2009
History: No changes posted

October 26, 2009
October 26, 2009
November 2009
March 2010   (final data collection date for primary outcome measure)
The number of subjects who achieve a titer of antibodies above 1/40 [ Time Frame: 6 weeks ] [ Designated as safety issue: No ]
Same as current
No Changes Posted
Number of patients with an increased Rodnan Score [ Time Frame: 6 weeks ] [ Designated as safety issue: Yes ]
Same as current
Not Provided
Not Provided
 
Influenza Vaccination in Patients With Scleroderma
Safety and Efficacy of Vaccination Against Influenza in Patients With Scleroderma

The safety and efficacy of vaccination against influenza in patients with scleroderma is not clear. The objective of this study is to assess its safety and efficacy in 50 patients with scleroderma in comparison with 30 controls

Fifty patients with scleroderma and 30 healthy , aged matched controls will participate in the study.

After signing informed consent, all subjects will be vaccinated with the inactivated split virion vaccine which recommended by the WHO this fall.

Patients will be evaluated at weel 0 and 6 weeks later. Clinical evaluation will be based on the modified Rodnan score, number of digital ischemic ulcers, presence of gastrointestinal and respiratory symptoms, number of swollen and tender joints, visual global evaluation of the physician , ESR and CRP Blood with be collected on the day of vaccination and 6 weeks later.

The immunogenicity of the vaccine will be tested by Haemagglutination inhibition (HI) test.

Influenza virus has two important surface glycoproteins: the haemagglutinin (HA) and the neuraminidase (NA). Antigenic classification and subtyping of influenza viruses is based on these two glycoproteins. HA plays a key role in virus cell entry by binding to cell surface receptors, which are found also on red blood cells of certain species. Binding to red cells results in haemagglutination, which can be observed as a carpet of agglutinated red cells at the bottom of a tube or microtitre well. In the HI test, antibody directed against the viral haemagglutinins block the virus from binding to the blood cells and thus inhibits the haemagglutination reaction.

The pre- and post immunization HI antibodies were tested at the Central Virology Laboratory of the Israeli Ministry of Health using the HI test according to a standard WHO procedure 16. Sera were separated, code labeled, and stored at -20°C until tested. Sera were treated with receptor destroying enzyme cholera filtrate to remove non-specific inhibitors, and with Turkey red blood cells to remove non-specific agglutinins. The treated sera were tested by HI test against the three antigens included in the vaccine: A/California (CAL), A/Wisconsin and B/Malaysia. The working dilution (test dose) of each antigen contained four haemagglutinin units in 25 µl of antigen. Test doses were diluted in phosphate buffered saline (PBS) and added to serial dilution of antiserum. The haemagglutinin inhibition titer was determined as the highest dilution of serum that completely inhibits haemagglutination of red blood cells.

The titer of an antiserum not showing any inhibition will be recorded as <10. Humoral response will be defined as either a fourfold or more rise in titer, or a rise from a non-protective baseline level of <1/40 to 1/40 in HI antibodies four weeks after vaccination 17,18. Geometric mean titers of antibody will be calculated to assess the immunity of the whole group.

Primary Endpoint of the study : the proportion of patients who achieve a titer of antibodies above 1/40, against each of the antigens included in the vaccine Secondary Endpoint: Safety of the vaccine

Interventional
Phase 4
Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Prevention
Influenza Vaccine in Scleroderma
Biological: Influenza vaccine
One dose of influenza vaccine
Not Provided
Setti M, Fenoglio D, Ansaldi F, Filaci G, Bacilieri S, Sticchi L, Ferrera A, Indiveri F, Ghio M. Flu vaccination with a virosomal vaccine does not affect clinical course and immunological parameters in scleroderma patients. Vaccine. 2009 May 26;27(25-26):3367-72. Epub 2009 Feb 5.

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Not yet recruiting
80
March 2010
March 2010   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • Patients >18 year old age
  • Capable to sign a informed consent
  • Suffering from scleroderma

Exclusion Criteria:

  • Known allergy to influenza vaccine
  • Allergy to eggs
Both
16 Years to 90 Years
Yes
Contact: Ira Litinsky, MD 97236873668 orie@tasmc.health.gov.il
Contact: Ori Elkayam, M.D 97236973668 oribe14@netvision.net.il
Israel
 
NCT01002508
0344-09
No
Ira Litinsky, Tel Aviv Medical Center
Tel-Aviv Sourasky Medical Center
Not Provided
Not Provided
Tel-Aviv Sourasky Medical Center
August 2009

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP