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The Effect of Physical Activity in Individuals With Post-bariatric Hypoglycemia

Primary Purpose

Hypoglycemia, Roux-en-Y Gastric Bypass, Post-bariatric Hypoglycemia

Status
Active
Phase
Not Applicable
Locations
United States
Study Type
Interventional
Intervention
Physical activity (cycling on a stationary bicycle ergometer or walking on a treadmill)
Sponsored by
Joslin Diabetes Center
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional other trial for Hypoglycemia focused on measuring Post-bariatric hypoglycemia, Exercise, Physical activity, Hypoglycemia, Bariatric surgery

Eligibility Criteria

18 Years - 60 Years (Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  1. Males or females diagnosed with ongoing post-bariatric hypoglycemia with prior episodes of neuroglycopenia, unresponsive to dietary intervention (low glycemic index, controlled carbohydrate portions) and trial of acarbose therapy at the maximally tolerated dose.
  2. Age 18-60 years of age, inclusive, at screening.
  3. Willingness to provide informed consent and follow all study procedures, including attending all scheduled visits.

Exclusion Criteria:

Initial general screening will be performed during an initial phone or in person visit (e.g. during a clinical visit). Individuals who appear to meet criteria will be invited for a screening visit, when a detailed history and physical exam will be performed by study clinicians. Inclusion and exclusion criteria will be reviewed after the visit to determine study eligibility.

Inclusion criteria:

  1. Males or females diagnosed with ongoing post-bariatric hypoglycemia with prior episodes of neuroglycopenia, unresponsive to dietary intervention (low glycemic index, controlled carbohydrate portions) and trial of acarbose therapy at the maximally tolerated dose.
  2. Age 18-60 years of age, inclusive, at screening.
  3. Willingness to provide informed consent and follow all study procedures, including attending all scheduled visits.

Exclusion criteria:

  1. Inability to exercise or medical contraindication to exercise;
  2. Documented hypoglycemia occurring in the fasting state (> 12 hours fast);
  3. Chronic kidney disease stage 4 or 5 (including end-stage renal disease);
  4. Hepatic disease, including serum alanine transaminase (ALT) or aspartate transferase (AST) greater than or equal to 3 times the upper limit of normal; hepatic synthetic insufficiency as defined as serum albumin < 3.0 g/dL; or serum bilirubin > 2.0;
  5. Congestive heart failure, New York Heart Association (NYHA) class II, III or IV;
  6. History of myocardial infarction, unstable angina or revascularization within the past 6 months or 2 or more risk factors for coronary artery disease including diabetes, uncontrolled hypertension, uncontrolled hyperlipidemia, and active tobacco use;
  7. History of syncope (unrelated to hypoglycemia) or diagnosed cardiac arrhythmia;
  8. Concurrent administration of β-blocker therapy;
  9. History of a cerebrovascular accident;
  10. Seizure disorder (other than with suspect or documented hypoglycemia);
  11. Active treatment with any diabetes medications except for acarbose and miglitol;
  12. Active treatment with a somatostatin analogue (both long and short acting) or diazoxide;
  13. Active malignancy, except basal cell or squamous cell skin cancers;
  14. Personal or family history of pheochromocytoma or disorder with increased risk of pheochromocytoma(MEN 2, neurofibromatosis, or Von Hippel-Lindau disease);
  15. Known insulinoma;
  16. Major surgical operation within 30 days prior to screening;
  17. Hematocrit < 33% (women) or <36% (men);
  18. Bleeding disorder, treatment with warfarin, or platelet count <50,000;
  19. Blood donation (1 pint of whole blood) within the past 2 months;
  20. Active alcohol abuse or substance abuse;
  21. Current administration of oral or parenteral corticosteroids;
  22. Pregnancy and/ or Lactation: For women of childbearing potential: there is a requirement for a negative urine pregnancy test and for agreement to use contraception during the study and for at least 1 month after participating in the study. Acceptable contraception includes birth control pill / patch / vaginal ring, Depo-Provera, Norplant, an intra-uterine device (IUD), the double barrier method (the woman uses a diaphragm and spermicide and the man uses a condom), or abstinence;
  23. Use of an investigational drug within 30 days prior to screening.

There will be no involvement of special vulnerable populations such as fetuses, neonates, pregnant women, children, prisoners, institutionalized or incarcerated individuals, or others who may be considered vulnerable populations.

Sites / Locations

  • Joslin Diabetes Center

Arms of the Study

Arm 1

Arm Type

Experimental

Arm Label

Participants with Post-bariatric Hypoglycemia Performing Structured Physical Activity

Arm Description

Individuals with a confirmed diagnosis of post-bariatric hypoglycemia will perform structured physical activity by cycling on a stationary bicycle ergometer or on a treadmill.

Outcomes

Primary Outcome Measures

Plasma glucose levels in response to physical activity
Area under the curve for glucose levels will be analyzed. Plasma glucose will be measured at baseline, during and after physical activity.
Insulin levels in response to physical activity
Area under the curve for insulin levels will be analyzed. Insulin levels will be measured in venous blood obtained through the intravenous catheter.
Glucagon levels in response to physical activity
Area under the curve for glucagon levels will be analyzed. Glucagon levels will be measured in venous blood obtained through the intravenous catheter.
Glucagon like peptide-1 (GLP-1) levels in response to physical activity
Area under the curve for GLP-1 levels will be analyzed. GLP-1 levels will be measured in venous blood obtained through the intravenous catheter.

Secondary Outcome Measures

Number of participants who develop hypoglycemia in response to physical activity
Participant displays or reports symptoms of clinically significant hypoglycemia (neuroglycopenia or a venous glucose level of less than 54 mg/dL).
Heart rate variability
Comparison of R-R interval in milliseconds to normative values
Hypoglycemia symptom score using the Edinburgh Hypoglycemia Symptom Scale (EHSS)
The total EHSS score will be compared between participants. The EHSS total score range is from 18 (which signifies no symptoms of hypoglycemia are present) to 126 (which signifies that the participant has all of assessed for symptoms qualified as very severe). Thus a higher score indicates the presence of both a higher number and/or greater severity of symptoms.

Full Information

First Posted
September 19, 2022
Last Updated
September 19, 2023
Sponsor
Joslin Diabetes Center
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1. Study Identification

Unique Protocol Identification Number
NCT05560789
Brief Title
The Effect of Physical Activity in Individuals With Post-bariatric Hypoglycemia
Official Title
The Effect of Physical Activity in Individuals With Post-bariatric Hypoglycemia
Study Type
Interventional

2. Study Status

Record Verification Date
September 2023
Overall Recruitment Status
Active, not recruiting
Study Start Date
January 3, 2023 (Actual)
Primary Completion Date
August 14, 2024 (Anticipated)
Study Completion Date
August 14, 2024 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Joslin Diabetes Center

4. Oversight

Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
No

5. Study Description

Brief Summary
The goal of this pilot study is to evaluate the magnitude of changes in glucose and hormone levels in response to structured exercise in the fasting state in individuals with post-bariatric hypoglycemia (PBH). This pilot study will assess the adequacy of a protocol to test the following hypotheses: (1) hypoglycemia will develop in individuals with PBH in response to exercise; (2) counterregulatory hormonal responses to hypoglycemia during exercise are impaired in individuals with PBH.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Hypoglycemia, Roux-en-Y Gastric Bypass, Post-bariatric Hypoglycemia, Physical Activity
Keywords
Post-bariatric hypoglycemia, Exercise, Physical activity, Hypoglycemia, Bariatric surgery

7. Study Design

Primary Purpose
Other
Study Phase
Not Applicable
Interventional Study Model
Single Group Assignment
Model Description
This study will assess glucose and hormone responses (insulin, glucagon, GLP-1) during structured exercise on a stationary bicycle ergometer or on a treadmill, up to a duration of 60 minutes, in individuals with a history of post-bariatric hypoglycemia.
Masking
None (Open Label)
Allocation
N/A
Enrollment
4 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
Participants with Post-bariatric Hypoglycemia Performing Structured Physical Activity
Arm Type
Experimental
Arm Description
Individuals with a confirmed diagnosis of post-bariatric hypoglycemia will perform structured physical activity by cycling on a stationary bicycle ergometer or on a treadmill.
Intervention Type
Behavioral
Intervention Name(s)
Physical activity (cycling on a stationary bicycle ergometer or walking on a treadmill)
Intervention Description
At time 0, exercise will be initiated and intensity will be increased at 2 minute intervals to achieve low intensity for 30 minutes (as defined by heart rate target 50-55% of maximum heart rate determined as 220-age). Next, intensity will be increased at 2 minute intervals until the heart rate target for moderate intensity exercise is achieved (55-65% of max heart rate), or the total duration of exercise of up to 60 minutes is achieved.
Primary Outcome Measure Information:
Title
Plasma glucose levels in response to physical activity
Description
Area under the curve for glucose levels will be analyzed. Plasma glucose will be measured at baseline, during and after physical activity.
Time Frame
Blood samples will be collected for measurement of plasma glucose at baseline (pre-exercise), 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, and 180 minutes.
Title
Insulin levels in response to physical activity
Description
Area under the curve for insulin levels will be analyzed. Insulin levels will be measured in venous blood obtained through the intravenous catheter.
Time Frame
Insulin levels are measured at baseline (pre-exercise), 15, 30, 45, 60, 90 and 120 minutes, as well as at the time of hypoglycemia (up to the 120 minute time point, should it occur).
Title
Glucagon levels in response to physical activity
Description
Area under the curve for glucagon levels will be analyzed. Glucagon levels will be measured in venous blood obtained through the intravenous catheter.
Time Frame
Glucagon levels are measured at baseline (pre-exercise), 15, 30, 45, 60, 90 and 120 minutes, as well as at the time of hypoglycemia (up to the 120 minute timepoint should it occur).
Title
Glucagon like peptide-1 (GLP-1) levels in response to physical activity
Description
Area under the curve for GLP-1 levels will be analyzed. GLP-1 levels will be measured in venous blood obtained through the intravenous catheter.
Time Frame
GLP-1 levels are measured at baseline (pre-exercise), 15, 30, 45, 60, 90 and 120 minutes, as well as at the time of hypoglycemia (up to the 120 time point should it occur).
Secondary Outcome Measure Information:
Title
Number of participants who develop hypoglycemia in response to physical activity
Description
Participant displays or reports symptoms of clinically significant hypoglycemia (neuroglycopenia or a venous glucose level of less than 54 mg/dL).
Time Frame
Baseline (pre-exercise), assessed up to 180 minutes after the initiation of physical activity.
Title
Heart rate variability
Description
Comparison of R-R interval in milliseconds to normative values
Time Frame
Measured once at baseline
Title
Hypoglycemia symptom score using the Edinburgh Hypoglycemia Symptom Scale (EHSS)
Description
The total EHSS score will be compared between participants. The EHSS total score range is from 18 (which signifies no symptoms of hypoglycemia are present) to 126 (which signifies that the participant has all of assessed for symptoms qualified as very severe). Thus a higher score indicates the presence of both a higher number and/or greater severity of symptoms.
Time Frame
At 60 minute time point, or termination of physical activity if earlier.

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Maximum Age & Unit of Time
60 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Males or females diagnosed with ongoing post-bariatric hypoglycemia with prior episodes of neuroglycopenia, unresponsive to dietary intervention (low glycemic index, controlled carbohydrate portions) and trial of acarbose therapy at the maximally tolerated dose. Age 18-60 years of age, inclusive, at screening. Willingness to provide informed consent and follow all study procedures, including attending all scheduled visits. Exclusion Criteria: Initial general screening will be performed during an initial phone or in person visit (e.g. during a clinical visit). Individuals who appear to meet criteria will be invited for a screening visit, when a detailed history and physical exam will be performed by study clinicians. Inclusion and exclusion criteria will be reviewed after the visit to determine study eligibility. Inclusion criteria: Males or females diagnosed with ongoing post-bariatric hypoglycemia with prior episodes of neuroglycopenia, unresponsive to dietary intervention (low glycemic index, controlled carbohydrate portions) and trial of acarbose therapy at the maximally tolerated dose. Age 18-60 years of age, inclusive, at screening. Willingness to provide informed consent and follow all study procedures, including attending all scheduled visits. Exclusion criteria: Inability to exercise or medical contraindication to exercise; Documented hypoglycemia occurring in the fasting state (> 12 hours fast); Chronic kidney disease stage 4 or 5 (including end-stage renal disease); Hepatic disease, including serum alanine transaminase (ALT) or aspartate transferase (AST) greater than or equal to 3 times the upper limit of normal; hepatic synthetic insufficiency as defined as serum albumin < 3.0 g/dL; or serum bilirubin > 2.0; Congestive heart failure, New York Heart Association (NYHA) class II, III or IV; History of myocardial infarction, unstable angina or revascularization within the past 6 months or 2 or more risk factors for coronary artery disease including diabetes, uncontrolled hypertension, uncontrolled hyperlipidemia, and active tobacco use; History of syncope (unrelated to hypoglycemia) or diagnosed cardiac arrhythmia; Concurrent administration of β-blocker therapy; History of a cerebrovascular accident; Seizure disorder (other than with suspect or documented hypoglycemia); Active treatment with any diabetes medications except for acarbose and miglitol; Active treatment with a somatostatin analogue (both long and short acting) or diazoxide; Active malignancy, except basal cell or squamous cell skin cancers; Personal or family history of pheochromocytoma or disorder with increased risk of pheochromocytoma(MEN 2, neurofibromatosis, or Von Hippel-Lindau disease); Known insulinoma; Major surgical operation within 30 days prior to screening; Hematocrit < 33% (women) or <36% (men); Bleeding disorder, treatment with warfarin, or platelet count <50,000; Blood donation (1 pint of whole blood) within the past 2 months; Active alcohol abuse or substance abuse; Current administration of oral or parenteral corticosteroids; Pregnancy and/ or Lactation: For women of childbearing potential: there is a requirement for a negative urine pregnancy test and for agreement to use contraception during the study and for at least 1 month after participating in the study. Acceptable contraception includes birth control pill / patch / vaginal ring, Depo-Provera, Norplant, an intra-uterine device (IUD), the double barrier method (the woman uses a diaphragm and spermicide and the man uses a condom), or abstinence; Use of an investigational drug within 30 days prior to screening. There will be no involvement of special vulnerable populations such as fetuses, neonates, pregnant women, children, prisoners, institutionalized or incarcerated individuals, or others who may be considered vulnerable populations.
Facility Information:
Facility Name
Joslin Diabetes Center
City
Boston
State/Province
Massachusetts
ZIP/Postal Code
02215
Country
United States

12. IPD Sharing Statement

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The Effect of Physical Activity in Individuals With Post-bariatric Hypoglycemia

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