Zinc DeficiencyPhase 1NCT01062347
A Novel Bio-marker of Zinc Status
A Phase 1 study testing Zinc in people with Zinc Deficiency, run by International Centre for Diarrhoeal Disease Research, Bangladesh at 1 site in Bangladesh.
Trial summary
Zinc deficiency is a widespread public health problem in developing countries. The true prevalence of this condition remains uncertain because of lack of a specific, sensitive and reliable biomarker for assessment of human zinc status. Read more about this study
- Who is it for?
- Ages 18 to 35 yearsHealthy volunteers can take part
- Conditions the study is for
- Zinc Deficiency
- What is being tested?
- Zinc
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- Not given
- Where
- 1 siteBangladesh
- Study dates
- 1 Jul 2007to 31 Dec 2010
- Phase
- Phase 1
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 35 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Healthy, non-smoking
Who cannot join
- Suffering from diarrhea
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Exploring the Possibility of Using Intestinal mRNA Levels of Zinc Transporter Genes, and Changes in Their Expression Levels in Response to Zinc Supplementation as a Bio-marker for Zinc Status
Zinc deficiency is a widespread public health problem in developing countries. The true prevalence of this condition remains uncertain because of lack of a specific, sensitive and reliable biomarker for assessment of human zinc status. The most widely used indicator for measuring zinc status is serum zinc level, which, however, is homeostatically regulated and influenced by stress and infection. To explore the possibility of using mRNA levels of zinc responsive genes as an indicator of zinc status, Cao and Cousins suggested metallothionein (MT) mRNA level in monocytes and peripheral blood mononuclear cells as an indicator of recent zinc uptake. However, the usefulness of MT mRNA is also limited because its level is influenced by other metals, such as copper, cadmium and cobalt and it is also affected by stress. Several authors have proposed that expression of zinc transporter genes might be useful markers of Zn status. Evidence shows reduction in dietary zinc content produces a marked increase in intestinal absorption and decrease in intestinal zinc losses. As zinc homeostasis is regulated in the intestine, study of the zinc transporters in this organ may provide indication of recent zinc uptake. Recently, a few studies have begun to investigate the applicability of using white blood cell zinc transporter expression as an indicator of zinc status and found that some of the transporters are zinc responsive. The primary objective of this study is to explore whether the expression of zinc responsive genes, such as zinc transporters in human intestinal mucosal cells, can be used as indicators of zinc status. The specific aims are to compare gene expression in: a) intestinal mucosal cells obtained by duodenal biopsy, b) sloughed intestinal mucosal cells isolated from feces, and c) peripheral blood mononuclear cells (PBMC) in fasting individuals who are receiving their usual diet + placebo or their usual diet + supplemental zinc (20 mg/d for 7 days). Gene expression values from intestinal mucosal cells (biopsy) will be compared between the placebo and zinc supplemented groups. Similar comparison will be done in the cells isolated from stool and PBMCs. This study will also provide an opportunity to compare the relative responsiveness of gene expression and serum zinc concentration following supplementation and to explore the kinetics of any changes in serum zinc concentration. Thus, blood samples will be obtained for measuring serum zinc concentration on two occasions prior to the interventions and at specified intervals during and after the intervention.
- Conditions
- Zinc Deficiency
- Being tested
- Zinc
- Keywords
- To identify a new bio-marker for zinc status
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ZincBiological
| Study group | Role | What they receive |
|---|---|---|
| zinc supplementation (20 mg/d, for 7 d) | Experimental | Not described Receives: Biological: Zinc |
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Feb 2010 (estimated)
- Study start1 Jul 2007
- Primary completion31 Dec 2010
- Study completion31 Dec 2010
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Zinc DeficiencyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
Sponsor and investigators
- Lead sponsor
- International Centre for Diarrhoeal Disease Research, Bangladesh
- Sponsor type
- University, hospital or other
- Collaborators
- University of California, Davis
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01062347
- Sponsor's protocol ID
- 2006-004
- Status last verified
- Feb 2010
- First submitted
- 3 Feb 2010
- Last updated
- 7 Jun 2017
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 7 Jun 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Exploring the Possibility of Using Intestinal mRNA Levels of Zinc Transporter Genes, and Changes in Their Expression Levels in Response to Zinc Supplementation as a Bio-marker for Zinc Status
- ClinicalTrials.gov ID
- NCT01062347
- Acronym / sponsor ID
- 2006-004
- Conditions
- Zinc Deficiency
- Keywords
- To identify a new bio-marker for zinc status
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Lead sponsor
- International Centre for Diarrhoeal Disease Research, BangladeshUniversity, hospital or other
- Collaborators
- University of California, Davis
- Study start
- 1 Jul 2007 (actual)
- Primary completion
- 31 Dec 2010 (actual)
- Study completion
- 31 Dec 2010 (actual)
- First posted
- 4 Feb 2010 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Zinc deficiency is a widespread public health problem in developing countries. The true prevalence of this condition remains uncertain because of lack of a specific, sensitive and reliable biomarker for assessment of human zinc status. The most widely used indicator for measuring zinc status is serum zinc level, which, however, is homeostatically regulated and influenced by stress and infection. To explore the possibility of using mRNA levels of zinc responsive genes as an indicator of zinc status, Cao and Cousins suggested metallothionein (MT) mRNA level in monocytes and peripheral blood mononuclear cells as an indicator of recent zinc uptake. However, the usefulness of MT mRNA is also limited because its level is influenced by other metals, such as copper, cadmium and cobalt and it is also affected by stress. Several authors have proposed that expression of zinc transporter genes might be useful markers of Zn status. Evidence shows reduction in dietary zinc content produces a marked increase in intestinal absorption and decrease in intestinal zinc losses. As zinc homeostasis is regulated in the intestine, study of the zinc transporters in this organ may provide indication of recent zinc uptake. Recently, a few studies have begun to investigate the applicability of using white blood cell zinc transporter expression as an indicator of zinc status and found that some of the transporters are zinc responsive. The primary objective of this study is to explore whether the expression of zinc responsive genes, such as zinc transporters in human intestinal mucosal cells, can be used as indicators of zinc status. The specific aims are to compare gene expression in: a) intestinal mucosal cells obtained by duodenal biopsy, b) sloughed intestinal mucosal cells isolated from feces, and c) peripheral blood mononuclear cells (PBMC) in fasting individuals who are receiving their usual diet + placebo or their usual diet + supplemental zinc (20 mg/d for 7 days). Gene expression values from intestinal mucosal cells (biopsy) will be compared between the placebo and zinc supplemented groups. Similar comparison will be done in the cells isolated from stool and PBMCs. This study will also provide an opportunity to compare the relative responsiveness of gene expression and serum zinc concentration following supplementation and to explore the kinetics of any changes in serum zinc concentration. Thus, blood samples will be obtained for measuring serum zinc concentration on two occasions prior to the interventions and at specified intervals during and after the intervention.
Study design
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| zinc supplementation (20 mg/d, for 7 d) | Experimental | Biological: Zinc |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- Healthy, non-smoking
Key exclusion criteria (1 listed)
- Suffering from diarrhea
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Zinc | Biological | zinc supplementation (20 mg/d, for 7 d) |
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Jun 2017.
- International Centre for Diarrheal Disease Research, BangladeshLink provided by the sponsor.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Zinc in people with Zinc Deficiency, run by International Centre for Diarrhoeal Disease Research, Bangladesh at 1 site in Bangladesh.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Jun 2017. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Bangladesh. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Jun 2017.