Cephalic Phase of Oncology Patients Before and After Chemotherapy as Compared to Healthy Controls
NCT ID: NCT00493740
Last Updated: 2007-07-06
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
NA
40 participants
INTERVENTIONAL
2007-07-31
2007-12-31
Brief Summary
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Detailed Description
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Cephalic phase refers to a simultaneous activation of gastrointestinal motility, gastric acid and pancreatic enzyme secretion ,as well as, release of hormones from the endocrine pancreas which occurs through activation of vagal -efferents as a result of food-related sensory stimuli such as taste and smell prior to nutrient absorption and which coincides with a thermogenic response.
Of the cephalic phase secretions, cephalic phase insulin release (CPIR) has received the most attention, but pancreatic polypeptide (PP) and glucagon responses have also been studied. While the magnitude of cephalic phase insulin release is relatively small (25% above baseline), pancreatic polypeptide increases 100% above baseline. The large magnitude of the PP response makes it a sensitive indicator of vagal activation to food stimuli.
In most experiments, subjects are either exposed to visual and olfactory stimulation by seeing and smelling the food stimulus or are required to perform a modified sham-feed, i.e. to taste, chew and then expectorate the food stimulus.
In general, cephalic phase are thought to be preparatory responses before ingestion of food. Because of their small magnitude, the physiological significance of the cephalic phase hormonal responses has been largely discounted. However, there is evidence that experimental prevention of CPIR lead to hyperinsulinemia and hyperglycemia. Therefore, CPIR may contribute to glucose homeostasis /regulation. Moreover CPIR may be an indicator of hunger and could be important for understanding eating disorders.
In parallel with these hormonal secretion ,an increase in energy expenditure has been also observed .This thermogenic response to food is even greater with sham feeding than with normal feeding and is paralleled by changes in RQ showing enhanced carbohydrate oxidation.
Disorders of taste are prevalent symptom in patients undergoing chemotherapy. The literature suggests that 36% to71% of patients report a distressing change in taste which often have a negative impact on quality of life and nutrition. It is unknown whether the cephalic phase of oncology patients may also be disturbed.
Conditions
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Study Design
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NON_RANDOMIZED
PARALLEL
BASIC_SCIENCE
NONE
Interventions
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chocolate cake
Eligibility Criteria
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Exclusion Criteria
18 Years
ALL
Yes
Sponsors
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Tel-Aviv Sourasky Medical Center
OTHER_GOV
Principal Investigators
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Nachum Vaisman, Prof.
Role: PRINCIPAL_INVESTIGATOR
TASMC
Locations
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Tel Aviv Sourasky Medical Center
Tel Aviv, , Israel
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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TASMC-07-NV-218-CTIL
Identifier Type: -
Identifier Source: org_study_id