DiabetesISTAR-TNCT02859116
Collection of Gastrointestinal Tissue Samples for the Characterization and ex Vivo Functional Assessment of Chemoreceptors
An observational study of Diabetes, run by AdventHealth Translational Research Institute at 1 site in United States.
Trial summary
The purpose of this study is to help scientists understand how the gut senses ingested nutrients and what kind of processes take place for their absorption in order to establish the association with diabetes and other metabolic diseases Scientists need human specimens to study. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Diabetes
- What is being tested?
- Collection of digestive tissues
- Type of treatment
- Surgery or procedure
- How many people
- 8 participants
- Where
- 1 siteUnited States
- Study dates
- 21 Jul 2016to 21 Jan 2022
- Phase
- Observational
- 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 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Patients undergoing elective gastrointestinal surgical procedures by the surgeons of the Center for Specialized Surgery.
Who may be able to join
- Men and women age 18 years and older who are having elective gastrointestinal surgery
- Able to provide written, informed consent
Who cannot join
- Unable to provide written, informed consent
- Use of antibiotics for more than 5 consecutive days in the three months prior to the study
Trial locations and contacts
1 site in 1 country.
United States1 site
Translational Research Institute for Metabolism and Diabetes
Orlando, Florida, 32804
About this study
The purpose of this study is to help scientists understand how the gut senses ingested nutrients and what kind of processes take place for their absorption in order to establish the association with diabetes and other metabolic diseases Scientists need human specimens to study.
- Conditions
- Diabetes
- Being tested
- Collection of digestive tissues
- Keywords
- Metabolic diseases
- Medical subject headings
- Diabetes Mellitus, Metabolic Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Collection of digestive tissuesProcedure or surgery
The surgeon will resect a sample (approximately 1-5 cm x 1-5 cm) of healthy tissue from the distal margins of the segment and at least 4 cm from the diseased area. The specimen for research will be obtained from the tissue that would ordinarily be removed during surgery.The tissue collected for our research purposes will be only remnant tissue which is discarded by the surgeon during the surgical intervention and has no diagnostic clinical value.
| Study group | Role | What they receive |
|---|---|---|
| Collection of digestive tissues | Digestive tissues will be collected from participants undergoing scheduled (non-emergent) gastrointestinal surgery. Receives: Procedure: Collection of digestive tissues |
What is being measured
The primary outcome is the main question the study is designed to answer.
Tissue collection
During surgery, a tissue specimen that would normally be discarded, will be obtained and used to identify the localization and amount of different proteins that regulate nutrient absorption.
Measured: Day of surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Aug 2016 (estimated)
- Study start21 Jul 2016
- Primary completion12 Sep 2018
- Study completion21 Jan 2022
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (18)Papers the sponsor has linked to this study.
- Other trials for DiabetesStudies 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
- Observational
- Observational model
- Other
- Time perspective
- Prospective
- Enrolment
- 8 participants (actual)
Sponsor and investigators
- Lead sponsor
- AdventHealth Translational Research Institute
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Richard Pratley, MD, Principal investigator, Study Principal Investigator
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02859116
- Sponsor's protocol ID
- TRIMD FH 794609
- Acronym
- ISTAR-T
- Status last verified
- Aug 2022
- First submitted
- 13 Jul 2016
- Last updated
- 3 Aug 2022
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Adler E, Hoon MA, Mueller KL, Chandrashekar J, Ryba NJ, Zuker CS. A novel family of mammalian taste receptors. Cell. 2000 Mar 17;100(6):693-702. doi: 10.1016/s0092-8674(00)80705-9.
PubMed 10761934Chandrashekar J, Hoon MA, Ryba NJ, Zuker CS. The receptors and cells for mammalian taste. Nature. 2006 Nov 16;444(7117):288-94. doi: 10.1038/nature05401.
PubMed 17108952Chandrashekar J, Mueller KL, Hoon MA, Adler E, Feng L, Guo W, Zuker CS, Ryba NJ. T2Rs function as bitter taste receptors. Cell. 2000 Mar 17;100(6):703-11. doi: 10.1016/s0092-8674(00)80706-0.
PubMed 10761935Margolskee RF, Dyer J, Kokrashvili Z, Salmon KS, Ilegems E, Daly K, Maillet EL, Ninomiya Y, Mosinger B, Shirazi-Beechey SP. T1R3 and gustducin in gut sense sugars to regulate expression of Na+-glucose cotransporter 1. Proc Natl Acad Sci U S A. 2007 Sep 18;104(38):15075-80. doi: 10.1073/pnas.0706678104. Epub 2007 Aug 27.
PubMed 17724332Wu SV, Rozengurt N, Yang M, Young SH, Sinnett-Smith J, Rozengurt E. Expression of bitter taste receptors of the T2R family in the gastrointestinal tract and enteroendocrine STC-1 cells. Proc Natl Acad Sci U S A. 2002 Feb 19;99(4):2392-7. doi: 10.1073/pnas.042617699.
PubMed 11854532Deshpande DA, Wang WC, McIlmoyle EL, Robinett KS, Schillinger RM, An SS, Sham JS, Liggett SB. Bitter taste receptors on airway smooth muscle bronchodilate by localized calcium signaling and reverse obstruction. Nat Med. 2010 Nov;16(11):1299-304. doi: 10.1038/nm.2237. Epub 2010 Oct 24.
PubMed 20972434Kinnamon SC. Taste receptor signalling - from tongues to lungs. Acta Physiol (Oxf). 2012 Feb;204(2):158-68. doi: 10.1111/j.1748-1716.2011.02308.x. Epub 2011 May 7.
PubMed 21481196Jang HJ, Kokrashvili Z, Theodorakis MJ, Carlson OD, Kim BJ, Zhou J, Kim HH, Xu X, Chan SL, Juhaszova M, Bernier M, Mosinger B, Margolskee RF, Egan JM. Gut-expressed gustducin and taste receptors regulate secretion of glucagon-like peptide-1. Proc Natl Acad Sci U S A. 2007 Sep 18;104(38):15069-74. doi: 10.1073/pnas.0706890104. Epub 2007 Aug 27.
PubMed 17724330Steinert RE, Gerspach AC, Gutmann H, Asarian L, Drewe J, Beglinger C. The functional involvement of gut-expressed sweet taste receptors in glucose-stimulated secretion of glucagon-like peptide-1 (GLP-1) and peptide YY (PYY). Clin Nutr. 2011 Aug;30(4):524-32. doi: 10.1016/j.clnu.2011.01.007. Epub 2011 Feb 15.
PubMed 21324568Jeon TI, Zhu B, Larson JL, Osborne TF. SREBP-2 regulates gut peptide secretion through intestinal bitter taste receptor signaling in mice. J Clin Invest. 2008 Nov;118(11):3693-700. doi: 10.1172/JCI36461. Epub 2008 Oct 9.
PubMed 18846256Chandra R, Liddle RA. Cholecystokinin. Curr Opin Endocrinol Diabetes Obes. 2007 Feb;14(1):63-7. doi: 10.1097/MED.0b013e3280122850.
PubMed 17940422Chao CY, Huang CJ. Bitter gourd (Momordica charantia) extract activates peroxisome proliferator-activated receptors and upregulates the expression of the acyl CoA oxidase gene in H4IIEC3 hepatoma cells. J Biomed Sci. 2003 Nov-Dec;10(6 Pt 2):782-91. doi: 10.1159/000073966.
PubMed 14631118Kim KS, Egan JM, Jang HJ. Denatonium induces secretion of glucagon-like peptide-1 through activation of bitter taste receptor pathways. Diabetologia. 2014 Oct;57(10):2117-25. doi: 10.1007/s00125-014-3326-5. Epub 2014 Jul 13.
PubMed 25016595Kyriazis GA, Smith KR, Tyrberg B, Hussain T, Pratley RE. Sweet taste receptors regulate basal insulin secretion and contribute to compensatory insulin hypersecretion during the development of diabetes in male mice. Endocrinology. 2014 Jun;155(6):2112-21. doi: 10.1210/en.2013-2015. Epub 2014 Apr 8.
PubMed 24712876Kyriazis GA, Soundarapandian MM, Tyrberg B. Sweet taste receptor signaling in beta cells mediates fructose-induced potentiation of glucose-stimulated insulin secretion. Proc Natl Acad Sci U S A. 2012 Feb 21;109(8):E524-32. doi: 10.1073/pnas.1115183109. Epub 2012 Feb 6.
PubMed 22315413
Study at a glance
From the registry record, last updated by the sponsor on 3 Aug 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Collection of Gastrointestinal Tissue Samples for the Characterization and ex Vivo Functional Assessment of Chemoreceptors
- ClinicalTrials.gov ID
- NCT02859116
- Acronym / sponsor ID
- ISTAR-T / TRIMD FH 794609
- Conditions
- Diabetes
- Keywords
- Metabolic diseases
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 8 participants (actual)
- Lead sponsor
- AdventHealth Translational Research InstituteUniversity, hospital or other
- Study start
- 21 Jul 2016 (actual)
- Primary completion
- 12 Sep 2018 (actual)
- Study completion
- 21 Jan 2022 (actual)
- First posted
- 8 Aug 2016 (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.
The purpose of this study is to help scientists understand how the gut senses ingested nutrients and what kind of processes take place for their absorption in order to establish the association with diabetes and other metabolic diseases Scientists need human specimens to study.
Study design
- Observational model
- Other
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Collection of digestive tissues | – | Procedure: Collection of digestive tissuesDigestive tissues will be collected from participants undergoing scheduled (non-emergent) gastrointestinal surgery. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Patients undergoing elective gastrointestinal surgical procedures by the surgeons of the Center for Specialized Surgery.
Key inclusion criteria (2 listed)
- Men and women age 18 years and older who are having elective gastrointestinal surgery
- Able to provide written, informed consent
Key exclusion criteria (2 listed)
- Unable to provide written, informed consent
- Use of antibiotics for more than 5 consecutive days in the three months prior to the study
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 |
|---|---|---|
| Collection of digestive tissuesThe surgeon will resect a sample (approximately 1-5 cm x 1-5 cm) of healthy tissue from the distal margins of the segment and at least 4 cm from the diseased area. The specimen for research will be obtained from the tissue that would ordinarily be removed during surgery.The tissue collected for our research purposes will be only remnant tissue which is discarded by the surgeon during the surgical intervention and has no diagnostic clinical value. | Procedure or surgery | Collection of digestive tissues |
Primary outcome
Tissue collection
Time frame: Day of surgery
During surgery, a tissue specimen that would normally be discarded, will be obtained and used to identify the localization and amount of different proteins that regulate nutrient absorption.
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 3 Aug 2022.
- Background: PubMed 10761934Adler E, Hoon MA, Mueller KL, Chandrashekar J, Ryba NJ, Zuker CS. A novel family of mammalian taste receptors. Cell. 2000 Mar 17;100(6):693-702. doi: 10.1016/s0092-8674(00)80705-9.
- Background: PubMed 17108952Chandrashekar J, Hoon MA, Ryba NJ, Zuker CS. The receptors and cells for mammalian taste. Nature. 2006 Nov 16;444(7117):288-94. doi: 10.1038/nature05401.
- Background: PubMed 10761935Chandrashekar J, Mueller KL, Hoon MA, Adler E, Feng L, Guo W, Zuker CS, Ryba NJ. T2Rs function as bitter taste receptors. Cell. 2000 Mar 17;100(6):703-11. doi: 10.1016/s0092-8674(00)80706-0.
- Background: PubMed 17724332Margolskee RF, Dyer J, Kokrashvili Z, Salmon KS, Ilegems E, Daly K, Maillet EL, Ninomiya Y, Mosinger B, Shirazi-Beechey SP. T1R3 and gustducin in gut sense sugars to regulate expression of Na+-glucose cotransporter 1. Proc Natl Acad Sci U S A. 2007 Sep 18;104(38):15075-80. doi: 10.1073/pnas.0706678104. Epub 2007 Aug 27.
- Background: PubMed 11854532Wu SV, Rozengurt N, Yang M, Young SH, Sinnett-Smith J, Rozengurt E. Expression of bitter taste receptors of the T2R family in the gastrointestinal tract and enteroendocrine STC-1 cells. Proc Natl Acad Sci U S A. 2002 Feb 19;99(4):2392-7. doi: 10.1073/pnas.042617699.
- Background: PubMed 20972434Deshpande DA, Wang WC, McIlmoyle EL, Robinett KS, Schillinger RM, An SS, Sham JS, Liggett SB. Bitter taste receptors on airway smooth muscle bronchodilate by localized calcium signaling and reverse obstruction. Nat Med. 2010 Nov;16(11):1299-304. doi: 10.1038/nm.2237. Epub 2010 Oct 24.
- Background: PubMed 21481196Kinnamon SC. Taste receptor signalling - from tongues to lungs. Acta Physiol (Oxf). 2012 Feb;204(2):158-68. doi: 10.1111/j.1748-1716.2011.02308.x. Epub 2011 May 7.
- Background: PubMed 17724330Jang HJ, Kokrashvili Z, Theodorakis MJ, Carlson OD, Kim BJ, Zhou J, Kim HH, Xu X, Chan SL, Juhaszova M, Bernier M, Mosinger B, Margolskee RF, Egan JM. Gut-expressed gustducin and taste receptors regulate secretion of glucagon-like peptide-1. Proc Natl Acad Sci U S A. 2007 Sep 18;104(38):15069-74. doi: 10.1073/pnas.0706890104. Epub 2007 Aug 27.
- Background: PubMed 21324568Steinert RE, Gerspach AC, Gutmann H, Asarian L, Drewe J, Beglinger C. The functional involvement of gut-expressed sweet taste receptors in glucose-stimulated secretion of glucagon-like peptide-1 (GLP-1) and peptide YY (PYY). Clin Nutr. 2011 Aug;30(4):524-32. doi: 10.1016/j.clnu.2011.01.007. Epub 2011 Feb 15.
- Background: PubMed 18846256Jeon TI, Zhu B, Larson JL, Osborne TF. SREBP-2 regulates gut peptide secretion through intestinal bitter taste receptor signaling in mice. J Clin Invest. 2008 Nov;118(11):3693-700. doi: 10.1172/JCI36461. Epub 2008 Oct 9.
- Background: PubMed 17940422Chandra R, Liddle RA. Cholecystokinin. Curr Opin Endocrinol Diabetes Obes. 2007 Feb;14(1):63-7. doi: 10.1097/MED.0b013e3280122850.
- Background: PubMed 14631118Chao CY, Huang CJ. Bitter gourd (Momordica charantia) extract activates peroxisome proliferator-activated receptors and upregulates the expression of the acyl CoA oxidase gene in H4IIEC3 hepatoma cells. J Biomed Sci. 2003 Nov-Dec;10(6 Pt 2):782-91. doi: 10.1159/000073966.
- Translational Research Institute for Metabolism and DiabetesLink provided by the sponsor.
- Individual participant dataSharing planned: No
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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.
Richard Pratley, MD principal investigator
Study Principal Investigator
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Diabetes, run by AdventHealth Translational Research Institute at 1 site in United States.
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 2 inclusion and 2 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 3 Aug 2022. 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 United States. 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.
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.
What does the primary outcome measure?
Tissue collection (time frame: Day of surgery). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02859116, which also lists 18 linked publications.
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 3 Aug 2022.