A Study Evaluating the Persistency of Response With or Without Xolair (Omalizumab) After Long-term Therapy

ClinicalTrials.gov ID: NCT01125748

Public ClinicalTrials.gov record NCT01125748. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

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ClinicalTrials.gov public records Last synced Oct 17, 2026, 10:23 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase IV, Multicenter, Randomized, Double-blind, Placebo-controlled Study Evaluating the Persistency of Response With or Without Xolair After Long-term Therapy (XPORT)

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This was a randomized, double-blind, placebo-controlled, 2-arm, 1-year study of participants who completed the EXCELS study (NCT00252135) and had received long-term treatment with Xolair. In addition, participants who did not participate in the EXCELS study but received long-term (\~5 years) treatment with Xolair were allowed to enter the study.

Study identification

NCT ID: NCT01125748
Recruitment status: Completed
Study type: Interventional
Phase: Phase 4
Lead sponsor: Genentech, Inc.; Industry
Enrollment: 176 participants

Conditions and interventions

Conditions

Allergic Asthma

Interventions

Drug

Eligibility (public fields only)

Age range: 17 Years to 70 Years
Sex: All
Healthy volunteers: Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date: May 2010 (Type not available)
Primary completion: Aug 2013 (Actual)
Completion: Aug 2013 (Actual)
Last update posted: Oct 15, 2014

2010 – 2013

United States locations

U.S. sites: 100
U.S. states: 31
U.S. cities: 90

Facility	City	State	ZIP	Site status
Not listed	Huntsville	Alabama	35801	—
Not listed	Little Rock	Arkansas	72205	—
Not listed	Bakersfield	California	93301	—
Not listed	Fresno	California	93720	—
Not listed	Fresno	California	93726	—
Not listed	Granada Hills	California	91344	—
Not listed	Los Angeles	California	90025	—
Not listed	Los Angeles	California	90064	—
Not listed	Napa	California	94558	—
Not listed	Redwood City	California	94063	—
Not listed	Sacramento	California	95819	—
Not listed	San Francisco	California	94104	—
Not listed	San Mateo	California	94401	—
Not listed	Studio City	California	91607	—
Not listed	Walnut Creek	California	94598	—
Not listed	Centennial	Colorado	80112	—
Not listed	Thornton	Colorado	80233	—
Not listed	Waterbury	Connecticut	06708	—
Not listed	Bay Pines	Florida	33744	—
Not listed	Clearwater	Florida	33765	—
Not listed	Loxahatchee Groves	Florida	33470	—
Not listed	Ocala	Florida	34471	—
Not listed	Pensacola	Florida	32503	—
Not listed	Tampa	Florida	33613	—
Not listed	West Palm Beach	Florida	33401	—
Not listed	Albany	Georgia	31707	—
Not listed	Columbus	Georgia	31904	—
Not listed	Gainesville	Georgia	30501	—
Not listed	Chicago	Illinois	60612	—
Not listed	Glen Carbon	Illinois	62034	—
Not listed	Park Ridge	Illinois	60068	—
Not listed	Fort Wayne	Indiana	46804	—
Not listed	Fort Wayne	Indiana	46815	—
Not listed	Overland Park	Kansas	66210	—
Not listed	Topeka	Kansas	66606	—
Not listed	Lexington	Kentucky	40513	—
Not listed	Mandeville	Louisiana	70471	—
Not listed	Metairie	Louisiana	70002	—
Not listed	Baltimore	Maryland	21236	—
Not listed	Ellicott City	Maryland	21042	—
Not listed	Gaithersburg	Maryland	20878	—
Not listed	Boston	Massachusetts	02114	—
Not listed	Gardner	Massachusetts	01440	—
Not listed	North Dartmouth	Massachusetts	02747	—
Not listed	Taunton	Massachusetts	02780	—
Not listed	Liberty	Missouri	64068	—
Not listed	Sasint Louis	Missouri	63104	—
Not listed	Springfield	Missouri	65807	—
Not listed	St Louis	Missouri	63110	—
Not listed	St Louis	Missouri	63141	—
Not listed	Bellevue	Nebraska	68123	—
Not listed	Omaha	Nebraska	68130	—
Not listed	Cranford	New Jersey	07016	—
Not listed	Edison	New Jersey	08820	—
Not listed	Hillsborough	New Jersey	08844	—
Not listed	Verona	New Jersey	07044	—
Not listed	Albany	New York	12205	—
Not listed	Middletown	New York	10940	—
Not listed	Mineola	New York	11501	—
Not listed	Mount Vernon	New York	10552	—
Not listed	New Paltz	New York	12561	—
Not listed	New York	New York	10022	—
Not listed	Newburgh	New York	12550	—
Not listed	Olean	New York	14760	—
Not listed	Rockville Centre	New York	11570	—
Not listed	Staten Island	New York	10304	—
Not listed	The Bronx	New York	10423	—
Not listed	The Bronx	New York	10461	—
Not listed	The Bronx	New York	10465	—
Not listed	Asheville	North Carolina	28801	—
Not listed	High Point	North Carolina	27262	—
Not listed	Fargo	North Dakota	58103	—
Not listed	Fargo	North Dakota	58104	—
Not listed	Beavercreek	Ohio	45434	—
Not listed	Centerville	Ohio	45458	—
Not listed	Oklahoma City	Oklahoma	73112	—
Not listed	Tulsa	Oklahoma	74133	—
Not listed	Altoona	Pennsylvania	16601	—
Not listed	Beaver	Pennsylvania	15009	—
Not listed	Carlisle	Pennsylvania	17013	—
Not listed	Harrisburg	Pennsylvania	17110	—
Not listed	Pittsburgh	Pennsylvania	15213	—
Not listed	Pittsburgh	Pennsylvania	15221	—
Not listed	Upland	Pennsylvania	19013	—
Not listed	Lincoln	Rhode Island	02865	—
Not listed	Greenville	South Carolina	29607	—
Not listed	Knoxville	Tennessee	37909	—
Not listed	Dallas	Texas	75230	—
Not listed	Dallas	Texas	75231	—
Not listed	El Paso	Texas	79925	—
Not listed	Garland	Texas	75044	—
Not listed	Heath	Texas	75032	—
Not listed	Round Rock	Texas	78681	—
Not listed	San Antonio	Texas	78233	—
Not listed	San Antonio	Texas	78251	—
Not listed	Richmond	Virginia	23298	—
Not listed	Spokane	Washington	99204	—
Not listed	Tacoma	Washington	98405	—
Not listed	Wheeling	West Virginia	26003	—
Not listed	Madison	Wisconsin	53715	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT01125748, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do: No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from: Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh: Last update posted Oct 15, 2014 · Synced Oct 17, 2026

Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT01125748 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →