Exposure to Neurotoxins as Risk Factors for ALS
Public ClinicalTrials.gov record NCT00340301. 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.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Exposure to Neurotoxins as Risk Factors for ALS: Measurement of Genes, Proteins, Neurotoxicants, and Other Factors Potentially Associated With ALS
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Chemicals called neurotoxins can harm the nervous system. Amyotrophic lateral sclerosis (ALS) is a progressive disease affecting movement. Researchers have studied many possible causes of ALS, including injury, diet, and exposure to chemicals, but these studies were inconclusive. The purpose of this study was to determine whether exposure to lead or other neurotoxins can contribute to ALS. The study also evaluated lifestyle and dietary patterns. The study was completed in 1994-1996. One hundred eighty-two participants took part in this study 110 patients with ALS and 72 who did not have ALS. Each completed a questionnaire concerning lifestyle, diet, and residential, job, and medical history. Participants contributed 50 cc of blood, used to measure lead, as well as clippings of their toenails, used to measure mercury and other metals. They then underwent an XRF test (an X-ray procedure) to measure the level of lead in their shinbones and knees. Genes related to ALS or susceptibility to lead exposure were also evaluated.
Study identification
- NCT ID
- NCT00340301
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 397 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- Not listed
- 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
- Jun 2, 2003
- Primary completion
- Not listed
- Completion
- Jan 22, 2019
- Last update posted
- Jan 24, 2019
2003 – 2019
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| New England Medical Center | Boston | Massachusetts | 02111 | — |
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 NCT00340301, 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 Jan 24, 2019 · Synced Sep 2, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00340301 live on ClinicalTrials.gov.