Trial Outcomes & Findings for Mast Cell Activation Test in Allergic Disease (NCT NCT03406325)

NCT ID: NCT03406325

Last Updated: 2020-04-09

Results Overview

Mast Cell Activation Test results of high/low level of house dust mite sensitivity by using normal donor cultured mast cells for validation.

Recruitment status

COMPLETED

Target enrollment

19 participants

Primary outcome timeframe

Mast cells studied after 9 weeks in culture

Results posted on

2020-04-09

Participant Flow

19 patients were recruited in the study. 12 were used for validation. 7 were used for patient-specific testing. Therefore, there were 1 validation group and 7 individuals' result.

Participant milestones

Participant milestones
Measure
Validation Group
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
Male patient, Total IgE: 28918KU/L; Der p2IgE: 64.4KU/L; clinical diagnosis: Eczema
SH#2
Male patient, Total IgE: 22311KU/L; Der p2IgE: 91.24KU/L; clinical diagnosis: Eczema
SH#3
Female patient, Total IgE: 5333KU/L; Der p2IgE: \>100KU/L; clinical diagnosis: Eczema
SH#4
Male patient, Total IgE: 4070KU/L; Der p2IgE: \>100KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
Male patient, Total IgE: 379KU/L; Der p2IgE: 0.15KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
Female patient, Total IgE: 13KU/L; Der p2IgE: \<0.1KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
Male patient, Total IgE: 67KU/L; Der p2IgE: None KU/L; clinical diagnosis: Urticaria
Overall Study
STARTED
12
1
1
1
1
1
1
1
Overall Study
COMPLETED
12
1
1
1
1
1
1
1
Overall Study
NOT COMPLETED
0
0
0
0
0
0
0
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Mast Cell Activation Test in Allergic Disease

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Validation Group
n=12 Participants
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
n=1 Participants
Male patient, Total IgE: 28918KU/L; Der p2IgE: 64.4KU/L; clinical diagnosis: Eczema
SH#2
n=1 Participants
Male patient, Total IgE: 22311KU/L; Der p2IgE: 91.24KU/L; clinical diagnosis: Eczema
SH#3
n=1 Participants
Female patient, Total IgE: 5333KU/L; Der p2IgE: \>100KU/L; clinical diagnosis: Eczema
SH#4
n=1 Participants
Male patient, Total IgE: 4070KU/L; Der p2IgE: \>100KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
n=1 Participants
Male patient, Total IgE: 379KU/L; Der p2IgE: 0.15KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
n=1 Participants
Female patient, Total IgE: 13KU/L; Der p2IgE: \<0.1KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
n=1 Participants
Male patient, Total IgE: 67KU/L; Der p2IgE: None KU/L; clinical diagnosis: Urticaria
Total
n=19 Participants
Total of all reporting groups
Age, Categorical
<=18 years
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
0 Participants
n=42 Participants
Age, Categorical
Between 18 and 65 years
12 Participants
n=5 Participants
1 Participants
n=7 Participants
1 Participants
n=5 Participants
1 Participants
n=4 Participants
1 Participants
n=21 Participants
1 Participants
n=8 Participants
1 Participants
n=8 Participants
1 Participants
n=24 Participants
19 Participants
n=42 Participants
Age, Categorical
>=65 years
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
0 Participants
n=42 Participants
Sex: Female, Male
Female
9 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
1 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
1 Participants
n=8 Participants
0 Participants
n=24 Participants
11 Participants
n=42 Participants
Sex: Female, Male
Male
3 Participants
n=5 Participants
1 Participants
n=7 Participants
1 Participants
n=5 Participants
0 Participants
n=4 Participants
1 Participants
n=21 Participants
1 Participants
n=8 Participants
0 Participants
n=8 Participants
1 Participants
n=24 Participants
8 Participants
n=42 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
0 Participants
n=42 Participants
Race (NIH/OMB)
Asian
12 Participants
n=5 Participants
1 Participants
n=7 Participants
1 Participants
n=5 Participants
1 Participants
n=4 Participants
1 Participants
n=21 Participants
1 Participants
n=8 Participants
0 Participants
n=8 Participants
1 Participants
n=24 Participants
18 Participants
n=42 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
0 Participants
n=42 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
0 Participants
n=42 Participants
Race (NIH/OMB)
White
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
1 Participants
n=8 Participants
0 Participants
n=24 Participants
1 Participants
n=42 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
0 Participants
n=42 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
0 Participants
n=42 Participants
Region of Enrollment
Hong Kong
12 participants
n=5 Participants
1 participants
n=7 Participants
1 participants
n=5 Participants
1 participants
n=4 Participants
1 participants
n=21 Participants
1 participants
n=8 Participants
1 participants
n=8 Participants
1 participants
n=24 Participants
7 participants
n=42 Participants
Clinical diagnosis
Eczema
4 Participants
n=5 Participants
1 Participants
n=7 Participants
1 Participants
n=5 Participants
1 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
7 Participants
n=42 Participants
Clinical diagnosis
Rhinitis
5 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
5 Participants
n=42 Participants
Clinical diagnosis
Urticaria
3 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
1 Participants
n=24 Participants
4 Participants
n=42 Participants
Clinical diagnosis
Exercise-induced anaphylaxis
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
1 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
1 Participants
n=42 Participants
Clinical diagnosis
Mast cell activation syndrome
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=8 Participants
1 Participants
n=8 Participants
0 Participants
n=24 Participants
1 Participants
n=42 Participants
Clinical diagnosis
Eczema and Urticaria
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
1 Participants
n=21 Participants
0 Participants
n=8 Participants
0 Participants
n=8 Participants
0 Participants
n=24 Participants
1 Participants
n=42 Participants

PRIMARY outcome

Timeframe: Mast cells studied after 9 weeks in culture

Population: Mast cells were cultured from blood of normal donors to validate the (Mast Cell Activation) MAT assay. The serum samples were obtained from allergic patients with sensitivities to Der p2 and used for passive sensitization of normal donor mast cells followed by their activation by Der p2 allergen. Data were collected only from the validation group.

Mast Cell Activation Test results of high/low level of house dust mite sensitivity by using normal donor cultured mast cells for validation.

Outcome measures

Outcome measures
Measure
Validation Group
n=12 Participants
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
Male patient, Total IgE: 28918 KU/L; Der p2 IgE: 64.4 KU/L; clinical diagnosis: Eczema
SH#2
Male patient, Total IgE: 22311 KU/L; Der p2 IgE: 91.24 KU/L; clinical diagnosis: Eczema
SH#3
Female patient, Total IgE: 5333 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema
SH#4
Male patient, Total IgE: 4070 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
Male patient, Total IgE: 379 KU/L; Der p2 IgE: 0.15 KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
Female patient, Total IgE: 13 KU/L; Der p2 IgE: \<0.1 KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
Male patient, Total IgE: 67 KU/L; Der p2 IgE: None KiloUnits (KU)/L; clinical diagnosis: Urticaria
Mast Cell Activation Test Results for Validation Group
High level of house dust mite sensitivity · MAT positive
6 Participants
Mast Cell Activation Test Results for Validation Group
High level of house dust mite sensitivity · MAT negative
2 Participants
Mast Cell Activation Test Results for Validation Group
Low level of house dust mite sensitivity · MAT positive
0 Participants
Mast Cell Activation Test Results for Validation Group
Low level of house dust mite sensitivity · MAT negative
4 Participants

PRIMARY outcome

Timeframe: Mast cells studied after 9 weeks in culture

Population: Serum samples were obtained from 19 patients in total, of whom 12 were in the validation group. The other 7 patients were studied more extensively in the trial and their data is reported individually in this section and thereafter.

Patient's serum was incubated with mast cells derived from normal donors for detection of mast cell activation as evidenced by histamine release.

Outcome measures

Outcome measures
Measure
Validation Group
n=12 Participants
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
n=1 Participants
Male patient, Total IgE: 28918 KU/L; Der p2 IgE: 64.4 KU/L; clinical diagnosis: Eczema
SH#2
n=1 Participants
Male patient, Total IgE: 22311 KU/L; Der p2 IgE: 91.24 KU/L; clinical diagnosis: Eczema
SH#3
n=1 Participants
Female patient, Total IgE: 5333 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema
SH#4
n=1 Participants
Male patient, Total IgE: 4070 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
n=1 Participants
Male patient, Total IgE: 379 KU/L; Der p2 IgE: 0.15 KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
n=1 Participants
Female patient, Total IgE: 13 KU/L; Der p2 IgE: \<0.1 KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
n=1 Participants
Male patient, Total IgE: 67 KU/L; Der p2 IgE: None KiloUnits (KU)/L; clinical diagnosis: Urticaria
Evaluation of Patient's Serum for Autoreactivity on Normal Average Responder Mast Cell Activation
0 Participants
1 Participants
0 Participants
0 Participants
0 Participants
0 Participants
0 Participants
0 Participants

PRIMARY outcome

Timeframe: Mast cells studied after 9 weeks in culture

Population: Mast cells derived from the validation group is reported as a group (mean +/-SD). The other 7 allergic patients were analysed and reported individually as explained earlier.

percentage of total histamine release by normal average responder mast cells that had been activated with patient's serum

Outcome measures

Outcome measures
Measure
Validation Group
n=12 Participants
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
n=1 Participants
Male patient, Total IgE: 28918 KU/L; Der p2 IgE: 64.4 KU/L; clinical diagnosis: Eczema
SH#2
n=1 Participants
Male patient, Total IgE: 22311 KU/L; Der p2 IgE: 91.24 KU/L; clinical diagnosis: Eczema
SH#3
n=1 Participants
Female patient, Total IgE: 5333 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema
SH#4
n=1 Participants
Male patient, Total IgE: 4070 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
n=1 Participants
Male patient, Total IgE: 379 KU/L; Der p2 IgE: 0.15 KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
n=1 Participants
Female patient, Total IgE: 13 KU/L; Der p2 IgE: \<0.1 KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
n=1 Participants
Male patient, Total IgE: 67 KU/L; Der p2 IgE: None KiloUnits (KU)/L; clinical diagnosis: Urticaria
Percentage Histamine Release by Normal Average Responder Mast Cells + Patient's Serum to Assess Autoreactivity
2.15 percentage of histamine released
Standard Deviation 0.71
32.1 percentage of histamine released
3.3 percentage of histamine released
2.8 percentage of histamine released
3.4 percentage of histamine released
5.1 percentage of histamine released
3.2 percentage of histamine released
3.8 percentage of histamine released

PRIMARY outcome

Timeframe: Mast cells studied after 9 weeks in culture

Population: Mast cells derived from 7 allergic patients were analysed and reported individually. Patients in the validation group were not measured for this outcome and their samples were only used to validate the assay.

percentage of total histamine release by patient's mast cells that had been activated with anti-IgE

Outcome measures

Outcome measures
Measure
Validation Group
n=1 Participants
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
n=1 Participants
Male patient, Total IgE: 28918 KU/L; Der p2 IgE: 64.4 KU/L; clinical diagnosis: Eczema
SH#2
n=1 Participants
Male patient, Total IgE: 22311 KU/L; Der p2 IgE: 91.24 KU/L; clinical diagnosis: Eczema
SH#3
n=1 Participants
Female patient, Total IgE: 5333 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema
SH#4
n=1 Participants
Male patient, Total IgE: 4070 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
n=1 Participants
Male patient, Total IgE: 379 KU/L; Der p2 IgE: 0.15 KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
n=1 Participants
Female patient, Total IgE: 13 KU/L; Der p2 IgE: \<0.1 KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
Male patient, Total IgE: 67 KU/L; Der p2 IgE: None KiloUnits (KU)/L; clinical diagnosis: Urticaria
Percentage Histamine Release by Patient's Mast Cells + Immunoglobulin E (IgE)/Anti-IgE
11.5 percentage of histamine release
38.3 percentage of histamine release
69.6 percentage of histamine release
47.9 percentage of histamine release
36.3 percentage of histamine release
45.5 percentage of histamine release
41.6 percentage of histamine release

PRIMARY outcome

Timeframe: Mast cells studied after 9 weeks in culture

Population: Mast cells derived from 7 allergic patients were analysed and reported individually. Patients in the validation group were not measured for this outcome and their samples were only used to validate the assay.

Percentage of total histamine release when patient's mast cells were activated with patient's own serum and Der p2. Each patient's results are reported individually.

Outcome measures

Outcome measures
Measure
Validation Group
n=1 Participants
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
n=1 Participants
Male patient, Total IgE: 28918 KU/L; Der p2 IgE: 64.4 KU/L; clinical diagnosis: Eczema
SH#2
n=1 Participants
Male patient, Total IgE: 22311 KU/L; Der p2 IgE: 91.24 KU/L; clinical diagnosis: Eczema
SH#3
n=1 Participants
Female patient, Total IgE: 5333 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema
SH#4
n=1 Participants
Male patient, Total IgE: 4070 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
n=1 Participants
Male patient, Total IgE: 379 KU/L; Der p2 IgE: 0.15 KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
n=1 Participants
Female patient, Total IgE: 13 KU/L; Der p2 IgE: \<0.1 KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
Male patient, Total IgE: 67 KU/L; Der p2 IgE: None KiloUnits (KU)/L; clinical diagnosis: Urticaria
Percentage of Histamine Release by Patient's Mast Cells + Patient's Serum + Allergen
24.5 percentage of histamine release
54.7 percentage of histamine release
79 percentage of histamine release
8.4 percentage of histamine release
0.2 percentage of histamine release
0.2 percentage of histamine release
0 percentage of histamine release

PRIMARY outcome

Timeframe: Mast cells studied after 9 weeks in culture

Population: Mast cells derived from 7 allergic patients were analysed and reported individually. Patients in the validation group were not measured for this outcome and their samples were only used to validate the assay.

Cell yield of patient's mast cell culture after 9 weeks in culture as an index of cell growth and differentiation.

Outcome measures

Outcome measures
Measure
Validation Group
n=1 Participants
Mast cell activation test employing normal donor cultured mast cells and allergic patient serum samples
SH#1
n=1 Participants
Male patient, Total IgE: 28918 KU/L; Der p2 IgE: 64.4 KU/L; clinical diagnosis: Eczema
SH#2
n=1 Participants
Male patient, Total IgE: 22311 KU/L; Der p2 IgE: 91.24 KU/L; clinical diagnosis: Eczema
SH#3
n=1 Participants
Female patient, Total IgE: 5333 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema
SH#4
n=1 Participants
Male patient, Total IgE: 4070 KU/L; Der p2 IgE: \>100 KU/L; clinical diagnosis: Eczema, Urticaria
SH#5
n=1 Participants
Male patient, Total IgE: 379 KU/L; Der p2 IgE: 0.15 KU/L; clinical diagnosis: Exercise-induced anaphylaxis
SH#6
n=1 Participants
Female patient, Total IgE: 13 KU/L; Der p2 IgE: \<0.1 KU/L; clinical diagnosis: Mast cell activation syndrome
SH#7
Male patient, Total IgE: 67 KU/L; Der p2 IgE: None KiloUnits (KU)/L; clinical diagnosis: Urticaria
Cell Yield Per 100ml Blood
14045000 Cell yield per 100ml blood
2895522 Cell yield per 100ml blood
115294 Cell yield per 100ml blood
625263 Cell yield per 100ml blood
4867778 Cell yield per 100ml blood
352000 Cell yield per 100ml blood
1400000 Cell yield per 100ml blood

Adverse Events

Validation Group

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

SH#1

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

SH#2

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

SH#3

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

SH#4

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

SH#5

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

SH#6

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

SH#7

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Prof. Tak Hong Lee

Hong Kong Sanatorium & Hospital

Phone: 28358430

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place