Ignite Creation Date:
2025-12-18 @ 9:19 AM
Ignite Modification Date:
2025-12-23 @ 8:33 PM
Study NCT ID:
NCT00493740
Status:
None
Last Update Posted:
2007-07-06 00:00:00
First Post:
2007-06-27 00:00:00
Is Possible Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
Cephalic Phase of Oncology Patients Before and After Chemotherapy as Compared to Healthy Controls
Sponsor:
None
Organization:
Study Overview
Official Title:
Cephalic Phase of Oncology Patients Before and After Chemotherapy as Compared to Healthy Controls
Status:
None
Status Verified Date:
2007-06
Last Known Status:
RECRUITING
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
Cephalic chemo
Brief Summary:
Food stimulation of gastric and pancreatic secretion is classically divided into cephalic, gastric and intestinal phases.
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.
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.
Detailed Description:
None
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: