Does Weight Loss Surgery and Probiotic Supplementation Lead to a "Lean" Gut Microbiota?



Status:Completed
Conditions:Obesity Weight Loss
Therapuetic Areas:Endocrinology
Healthy:No
Age Range:18 - Any
Updated:4/21/2016
Start Date:September 2013
End Date:January 2016

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The purpose of the weight-loss study is to characterize the effect of LGG supplementation on
the relative abundance of phyla in the gut microbiota of patients undergoing gastric bypass
and sleeve gastrectomy surgery, and to elucidate a relationship between the gut microbiota
pattern and the degree of weight-loss post-surgery.

The investigators hypothesize that LGG administration will result in a "leaner" pattern of
gut microbiota that will lead to higher weight loss at 3 months post-surgery.


Inclusion Criteria:

1. Age greater than or equal to 18 years

2. Able to give informed consent and report on side effects

3. Tolerating an oral/enteral diet

4. Stable comorbid conditions

5. Outpatient

Exclusion Criteria:

1. Inpatients

2. Pregnancy (urine test done on all patients routinely pre-op)/ unwilling to comply
with contraceptive requirement after gastric bypass surgery

3. Known use of LGG or another probiotic (not including yogurt) within the previous 30
days

4. Presence of an active bowel leak, acute abdomen, active intestinal disease, or
significant bowel dysfunction

5. Presence of an absolute neutrophil count less than 500 per cubic mm (must have had a
Complete Blood Count within the last 6 months) or anticipation post chemotherapy that
the absolute neutrophil count will fall below 500 per cubic mm.

6. History of adverse reaction to product containing lactobacillus

7. Active colitis (*see definition below)

8. Known or suspected allergies to probiotics, lactobacillus, milk protein, or
microcrystalline cellulose

9. Structural heart disease, history of endocarditis or valve replacement, implanted
cardiac device, congestive heart failure

10. Positive baseline stool culture for LGG

11. Recent or planned chemotherapy or radiation therapy

12. Solid organ transplant within the prior year

13. Stem cell transplant within the prior year

14. On active immunosuppressive medication [anti-rejection, injectable immunosuppressive
drugs for autoimmune disease, or corticosteroids (greater than ½ mg per kg body
weight of prednisone or its equivalent) not including inhaled or topical steroids]

15. Allergy or intolerance to or contraindication to two or more of the rescue antibiotic
regimens (ampicillin, clindamycin, moxifloxacin)

16. Participating in another clinical trial

17. Uncontrolled psychiatric illness
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