Clinical Trial Results:
Characterization of human peripheral and intestinal T-cell responses after mucosal antigen exposure: induction of tolerance vs. immunization by oral administration of KLH
Summary
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EudraCT number |
2011-001232-27 |
Trial protocol |
DE |
Global end of trial date |
30 Jun 2015
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Results information
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Results version number |
v1(current) |
This version publication date |
28 Feb 2020
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First version publication date |
28 Feb 2020
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Other versions |
Trial Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
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Trial identification
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Sponsor protocol code |
KLEX
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Additional study identifiers
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ISRCTN number |
- | ||
US NCT number |
- | ||
WHO universal trial number (UTN) |
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Sponsors
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Sponsor organisation name |
Charité - Universitätsmedizin Berlin
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Sponsor organisation address |
Charitéplatz 1, Berlin, Germany, 10117
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Public contact |
Dr. Reiner Ullrich, CBF, Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, reiner.ullrich@charite.de
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Scientific contact |
Dr. Reiner Ullrich, CBF, Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, reiner.ullrich@charite.de
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Paediatric regulatory details
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Is trial part of an agreed paediatric investigation plan (PIP) |
No
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Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Results analysis stage
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Analysis stage |
Final
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Date of interim/final analysis |
30 Jun 2015
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Is this the analysis of the primary completion data? |
Yes
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Primary completion date |
04 Jun 2014
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Global end of trial reached? |
Yes
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Global end of trial date |
30 Jun 2015
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Was the trial ended prematurely? |
No
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General information about the trial
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Main objective of the trial |
Safety of immunization with KLH following oral and / or parenteral administration
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Protection of trial subjects |
Treated at tertiary care center
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Background therapy |
- | ||
Evidence for comparator |
- | ||
Actual start date of recruitment |
01 Jun 2012
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Long term follow-up planned |
No
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Independent data monitoring committee (IDMC) involvement? |
No
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Population of trial subjects
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Number of subjects enrolled per country |
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Country: Number of subjects enrolled |
Germany: 22
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Worldwide total number of subjects |
22
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EEA total number of subjects |
22
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Number of subjects enrolled per age group |
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In utero |
0
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Preterm newborn - gestational age < 37 wk |
0
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Newborns (0-27 days) |
0
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Infants and toddlers (28 days-23 months) |
0
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Children (2-11 years) |
0
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Adolescents (12-17 years) |
0
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Adults (18-64 years) |
22
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From 65 to 84 years |
0
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85 years and over |
0
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Recruitment
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Recruitment details |
Recruitment period: June 26, 2012 to June 4, 2014 | |||||||||||||||
Pre-assignment
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Screening details |
healthy volunteers including normal blood count, CRP, ALT, GGT, creatinin | |||||||||||||||
Period 1
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Period 1 title |
Exposition (overall period)
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Is this the baseline period? |
Yes | |||||||||||||||
Allocation method |
Not applicable
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Blinding used |
Not blinded | |||||||||||||||
Arms
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Are arms mutually exclusive |
Yes
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Arm title
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oral-parenteral (A1) | |||||||||||||||
Arm description |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | |||||||||||||||
Arm type |
Experimental | |||||||||||||||
Investigational medicinal product name |
Keyhole limpet hemocyanin (KLH)
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Solution for injection/skin-prick test, Oral solution
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Routes of administration |
Cutaneous use, Oral use
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Dosage and administration details |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally.
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Arm title
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control K1 | |||||||||||||||
Arm description |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | |||||||||||||||
Arm type |
Active comparator | |||||||||||||||
Investigational medicinal product name |
Keyhole limpet hemocyanin (KLH)
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Solution for injection/skin-prick test
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Routes of administration |
Cutaneous use
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Dosage and administration details |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally.
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Arm title
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parenteral-oral-parenteral (A2) | |||||||||||||||
Arm description |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | |||||||||||||||
Arm type |
Experimental | |||||||||||||||
Investigational medicinal product name |
Keyhole limpet hemocyanin (KLH)
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Oral solution, Solution for injection/skin-prick test
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Routes of administration |
Cutaneous use, Oral use
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Dosage and administration details |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally.
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Arm title
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control K2 | |||||||||||||||
Arm description |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | |||||||||||||||
Arm type |
Active comparator | |||||||||||||||
Investigational medicinal product name |
Keyhole limpet hemocyanin (KLH)
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Solution for injection/skin-prick test
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Routes of administration |
Cutaneous use
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Dosage and administration details |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally.
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Baseline characteristics reporting groups
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Reporting group title |
Exposition
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Reporting group description |
- | |||||||||||||||||||||||||||
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End points reporting groups
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Reporting group title |
oral-parenteral (A1)
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Reporting group description |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | ||
Reporting group title |
control K1
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Reporting group description |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | ||
Reporting group title |
parenteral-oral-parenteral (A2)
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Reporting group description |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | ||
Reporting group title |
control K2
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Reporting group description |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. |
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End point title |
Number of SAR | |||||||||||||||
End point description |
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End point type |
Primary
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End point timeframe |
Trial duration
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Statistical analysis title |
Safety of oral KLH | |||||||||||||||
Statistical analysis description |
The frequency of SAR will be compared between oral (A1, A2) and parenteral only (K1, K2) groups by the two-tailed Chi-Square test.
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Comparison groups |
oral-parenteral (A1) v control K1 v parenteral-oral-parenteral (A2) v control K2
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Number of subjects included in analysis |
22
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Analysis specification |
Pre-specified
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Analysis type |
other | |||||||||||||||
P-value |
= 1 | |||||||||||||||
Method |
Fisher exact | |||||||||||||||
Confidence interval |
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Adverse events information
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Timeframe for reporting adverse events |
Trial duration
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Assessment type |
Systematic | ||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
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Dictionary name |
MedDRA | ||||||||||||||||||||||||||||||||||||||||
Dictionary version |
15.1
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Reporting groups
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Reporting group title |
oral-parenteral (A1)
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Reporting group description |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | ||||||||||||||||||||||||||||||||||||||||
Reporting group title |
control K1
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Reporting group description |
The subjects of the oral group A1 receive daily 50 mg KLH orally for ten days, followed by two parenteral immunizations with 0.1 mg KLH subcutaneously The subjects of the control group K1 receive only the parenteral immunizations. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | ||||||||||||||||||||||||||||||||||||||||
Reporting group title |
parenteral-oral-parenteral (A2)
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Reporting group description |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | ||||||||||||||||||||||||||||||||||||||||
Reporting group title |
control K2
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Reporting group description |
To test whether oral KLH can modulate existing KLH-specific immunity, subjects of groups A2 and K2 are first immunized by two parenteral immunizations with 0.1 mg KLH subcutaneously. A skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. The A2 subjects but not the K2 subjects then receive daily 50 mg KLH orally for ten days. Ten days later in both groups a skin delayed-type hypersensitivity reaction is elicited by 0.01 mg KLH intradermally. | ||||||||||||||||||||||||||||||||||||||||
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Frequency threshold for reporting non-serious adverse events: 5% | |||||||||||||||||||||||||||||||||||||||||
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Substantial protocol amendments (globally) |
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Were there any global substantial amendments to the protocol? Yes | |||
Date |
Amendment |
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18 Mar 2013 |
a) non-substantial changes of the protocol (The protocol refers now to the reference values of the Charité Laboratory)
b) Amendment with respect to the IMPD (shelf life extension of the IMP) |
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Interruptions (globally) |
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Were there any global interruptions to the trial? No | |||
Limitations and caveats |
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Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data. | |||
None reported |