Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine

Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
Surgical Treatment of Type 2
Do Surgeons have a Better Treatment?

            John Bantle, MD
Division of Endocrinology and Diabetes
        Department of Medicine
        University of Minnesota
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
Disclosure Information
I have no financial relationship to disclose.

I will not discuss off label or investigational
        product use in my presentation.
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
Goals of Presentation
•   To review expected weight loss with medical
    and surgical treatments.
•   To describe the bariatric procedures in
    current use.
•   To summarize the effects of bariatric surgery
    on type 2 diabetes.
•   To review potential adverse outcomes of
    bariatric surgery.
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
Natural History of Type 2 Diabetes
                                                                                 Postmeal Glucose
   Glucose (mg/dL)

                                                                                                    Fasting Glucose
Relative Function (%)

                        200                                                                Insulin Resistance
                              Prediabetes (IFG, IGT)   Clinical Diagnosis
                        50                                                                          -Cell Function
                                -10       -5        0          5            10       15       20       25       30
                                                 Onset of
                                                 Diabetes              Years

Adapted from: Simonson GD, Kendall DM. Coron Artery Dis. 2005;16(8):465-472.
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
To Avoid Type 2 Diabetes

• If you are lean, try to stay lean.
• If you are overweight, try to lose weight.
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
“To lengthen thy life, lessen
thy meals”
Benjamin Franklin 1733

“and quicken thy heart with exercise”
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
Surgical Treatment of Type 2 Diabetes: Do Surgeons have a Better Treatment? John Bantle, MD - Department of Medicine
Action for HEAlth in Diabetes
         (Look AHEAD)
• NIH sponsored clinical trial of lifestyle modification
  to reduce CV events in type 2 diabetic subjects.
• Random assignment to an intensive lifestyle
  intervention or a program of diabetes support and
  education (control group).
• 5,145 subjects randomized
• Multicenter
• All participants continued to receive diabetes care
  from their own physician
Intensive Lifestyle Intervention
            (ILI) Group
Structured hypocaloric, low fat diet
Regular use of meal replacements
Regular exercise (goal 175 minutes per week)
Behavioral components
Weekly group or individual sessions months 1-6, frequent
   subsequent contact
Toolbox including orlistat as rescue strategy
Refresher courses and campaigns
Goal to achieve 7% average weight loss in the first 6
   months and maintain it thereafter
Four Year Results
     (Averaged Across All 4 Years)
          Arch Intern Med 2010;170:1566

                                   ILI       Control      P value
Weight loss (% initial)           -6.2*       -0.9*       < 0.001
Fitness gain (METS)               +12.7       +2.0        < 0.001
Hb A1c (%)                         -0.4        -0.1       < 0.001
Systolic BP (mmHg)                  -5          -3        < 0.001
LDL chol (mg/dl)                   -11         -13         0.009
HDL chol (mg/dl)                    +4          +2        < 0.001
Triglycerides (mg/dl)              -26         -20        < 0.001
* At 4 years, weight change was -4.7% and -1.1%, respectively
Why is Wight Loss so Difficult for
   Most People to Accomplish?
Probably because each of us has a body weight that
  our hypothalamus works to maintain.
This weight may be defended as is, for instance,
  body temperature.
 1) Deficient caloric intake compensated for by
  decrease in metabolic rate and decrease in
  physical activity.
 2) Excess caloric intake suppresses appetite,
  some calories dissipated as heat.
Biochemistry of Energy Regulation
Leptin: produced in adipose tissue, circulates in
  proportion to body adiposity.
Insulin: circulates in proportion to body adiposity.
Neuropeptide Y: potent stimulator of food intake,
  increases during fasting, inhibited by leptin.
Agouti-Related Protein: stimulates appetite.
Ghrelin: signals hunger, increases food intake.
Peptide YY: signals satiety, decreases food intake,
  inhibits gut motility.
Glucagon-Like Peptide 1: increases satiety.
Bariatric Surgery
Jejunoileal Bypass for Morbid Obesity:
     Late Follow-up in 100 Cases
    Hocking MP, et al. N Engl J Med 1983;308:995-9.

Results from 100 patients who underwent jejunoileal
    bypass and had 5 or more years of follow-up.
Procedure: end-to-side anastomosis of the jejunum 30 cm
    from the ligament of Treitz to the ileum 10 cm from the
    ileocecal valve.
Mean weight loss at 5 years was 46.6 kg.
Complications (n): progressive hepatic abnormalities (29),
    cirrhosis (7), nephrolithiasis (21), cholelithiasis (14),
    chronic diarrhea (58), chronic hypokalemia (33).
The investigators abandoned the procedure.
Bariatric Surgical Procedures
         in Current Use
1) Vertical banded gastroplasty
2) Laparoscopic gastric banding
3) Roux-en-Y gastric bypass
4) Biliopancreatic diversion with
   duodenal switch
5) Sleeve gastrectomy
Meta-analysis: Surgical Treatment of
  Maggard MA, et al. Ann Intern Med 2005;142:547-59.

Meta-analysis of 147 studies of bariatric surgery for
Weight loss           12 months         > 36 months
 Gastric banding         30.2 kg           34.8 kg
 Gastric bypass         43.5 kg            41.5 kg
 Duodenal switch         51.9 kg           53.1 kg
Maggard MA, et al (continued)
Mortality                                     < 30 Days                     > 30 days
 Gastric banding                                0.02 %                        0.1 %
 Gastric bypass                                 0.3 %                         0.6 %
 Duodenal switch                                0.9 %                         0.3 %

Adverse Events                                   All GI*                      Other+
  Gastric banding                                7.0 %                        13.2 %
  Gastric bypass                                 16.9 %                       18.7 %
  Duodenal switch                                37.7 %                          ?#
* Including reflux, vomiting, dysphagia, dumping syndrome and others.
+ Including anastomotic leak, stenosis, bleeding, need for reoperation and others.
# Not reported in all categories.
Lifestyle, Diabetes and Cardiovascular Risk
  Factors 10 Years after Bariatric Surgery
  Sjostrom L, et al. N Engl J Med 2004;351:2683-93.

641 Swedish obese subjects who chose to undergo
   bariatric surgery compared to 647 control subjects
   who received nonsurgical treatment for obesity as was
   customary at their medical center.
Subjects in the two groups were matched on 18 variables
   including gender, age, weight, height, systolic BP and
   diabetes status.
After 10 years, weight changes were: control group
   +1.6+12%, gastric banding group -13+13%, vertical
   banded gastroplasty group -16+11% and gastric
   bypass group -25+11% (control vs. surgery, p
Sjostrom L, et al (continued)

                     Control   Surgery   P Value
                     Group      Group
Recovery from pre-
 existing diabetes    13%       36%      0.001

 Incidence of new
      diabetes        24%        7%
Effects of Bariatric Surgery on Mortality in
            Swedish Subjects
  Sjostrom L, et al. N Engl J Med 2007;357:741-52.

Overall mortality of 4047 Swedish obese subjects
  during an average follow-up of 10.9 years
129 (6.3%) subjects in the control group and 101
  (5.0%) subjects in the surgical group died.
Hazard ratio for surgical group was 0.76 when
  compared to the control group (95% CI 0.59 to
  0.99, p=0.04).
Most common causes of death were MI (control
  25, surgery 13) and cancer (control 47, surgery
Long-Term Mortality after Gastric Bypass
    Adams TD, et al. Engl J Med 2007;357:753-61

Retrospective cohort study comparing 7,925
  patients who underwent gastric bypass surgery
  for obesity to 7,925 obese subjects who applied
  for driver’s licenses; matching based on gender,
  age and BMI.
During mean follow-up of 7.1 years, adjusted
  mortality in the surgery group decreased by 40%
  as compared to the control group (37.6 vs. 57.1
  deaths per 10,000 person years, p
Pories, W.J., et al., Who would have thought it? An operation proves to be the most effective therapy for adult‐onset diabetes
mellitus. Ann Surg, 1995. 222(3): p. 339‐50; discussion 350‐2.
Porries WJ, et al (continued)

Long-term follow-up of 608 patients who underwent
open gastric bypass
                   n        Mean      Mean BMI
                          Weight (kg)  (kg/m2)
  Pre-op          608       138.4        49.7

   1 year         506        87.4           31.5

  5 years         317        93.4           33.7

  10 years        158        93.7           34.7
Porries WJ, et al (continued)
121 of 146 (83 %) patients with diabetes developed and
  maintained normal blood glucose and A1c without

 Perioperative mortality    1.5 %
 Reoperation                2.8 %
 Wound infections           8.7 %
 Anastomotic stenosis       3.0 %
 Splenic tears              2.5 %
 Subphrenic abscess         2.5 %
 Incisional hernia          24 %
 B12 deficiency             40 %
 Anemia                     39 %
 Cholelithiasis             11 %
 Hypoglycemia               5.7 %
Weight and Type 2 Diabetes After
Bariatric Surgery: Systematic Review and
     Buchwald H, et al. Am J Med 2009;122:248-56.
Meta-analysis of 621 studies published between 1/1/1990
    and 4/30/2006; 73% single arm and 58%
135,246 patients; 22.3% (30,160 patients) had diabetes.
Mean weight loss < 2 years 36.6 kg; > 2 years 41.6 kg.
Diabetes resolution (no diabetes meds, A1c < 6.0% and/or
    fasting glucose
Buchwald H, et al (continued)
Overall 30 day or less mortality was 0.28%
“The available information on nonfatal adverse
   effects of the bariatric surgery procedures is
   so heterogeneous, sparse and poorly
   reported that it does not allow… meaningful
Mechanisms of Improvement

1. Reduced need for glucose disposal
2. Weight loss induced increase in insulin
3. Weight loss induced decreases in
   lipotoxicity and inflammation
4. Changes in gut hormones (increases in
   GLP-1 and peptide YY, decrease in
Randomized Clinical Trials
Adjustable Gastric Banding and Conventional Therapy
 for Type 2 Diabetes: A Randomized Controlled Trial
               Dixon JB, et al. JAMA 2008;299:316-323.

60 obese (BMI 30-40 kg/m2) patients with diabetes of less than 2
   years duration randomly assigned to conventional therapy or
   laproscopic adjustable gastric banding.
Conventional therapy included lifestyle modification with
   structured low fat diet, 200 minutes physical activity per week,
   contact every 6 weeks, and diabetes and weight loss
   medications (no GLP-1 mimetics).
Baseline A1c values: Conventional 7.6%, Surgery 7.8%.
Follow-up lasted 2 years.
Dropouts: 4 Conventional therapy patients and 1 Surgery patient.
Dixon: Outcomes at 2 Years

                  Conventional    Surgery      P value

Weight loss         1.5 + 5.4    21.1 + 10.5   < 0.001
Hb A1c (%)          7.2 + 1.4     6.0 + 0.8    < 0.001

Glucose             140 + 38      106 + 30      0.002
Insulin (uU/ml)     24 + 14        10 + 5      < 0.001
Dixon, et al (cont.)

• 73 % (22/30) of Surgery and 13% (4/30) of
  Conventional patients achieved remission of
• Amount of weight loss, not the method, was
  related to remission of diabetes.
• Diabetes medication use was less in Surgery
  than Conventional patients (4 vs 28 patients).
• There were no serious complications in either
Bariatric Surgery versus Intensive Medical
     Management in Obese Patients with Diabetes
         Schauer PJ, et al. New Engl J Med 2012;366:1567-76.

150 obese (BMI 27-43 kg/m2) patients with type 2 diabetes and
   Hgb A1c > 7.0% randomly assigned to intensive medical
   therapy or gastric bypass or sleeve gastrectomy.
Conventional therapy included lifestyle counseling for weight loss
   and all approved diabetes medications.
Primary endpoint: percentage of patients with Hgb A1c < 6.0%
   (with or without medications).
Follow-up lasted 1 year.
Dropouts: 9 conventional therapy and 1 sleeve gastrectomy
Schauer: Outcomes at 1 Year

               Medical          Gastric       Sleeve
               Therapy          Bypass      Gastrectomy

Weight Loss    5.2+7.7%    27.5+7.3%*       24.7+6.6%*

A1c < 6.0%      5 of 41         21 of 50*    18 of 49*
                (12%)            (42%)        (37%)

* p < 0.01 vs Medical Therapy
Bariatric Surgery versus Conventional Medical
            Therapy for Type 2 Diabetes
          Mingrone G, et al. N Engl J Med:366:1577-85.

60 obese (BMI > kg/m2) patients with type 2 diabetes for at least
   5 years and Hgb A1c > 7.0% randomly assigned to
   conventional medical therapy or gastric bypass or
   biloipancreatic diversion.
Conventional therapy included lifestyle modification and
   diabetes medications as necessary.
Primary endpoint: diabetes remission.
Follow-up: 2 years.
Dropouts: 2 conventional therapy, 1 gastric bypass and 1
   biliopancreatic diversion patients.
Mingrone: Outcomes at 2 Years

               Medical           Gastric   Biliopancreat
               Therapy           Bypass      Diversion

Weight Loss    4.7+6.4%     33.3+7.9%*     33.8+10.2%*

Remission       0 of 20      15 of 20*       19 of 20*
of Diabetes                   (75%)           (95%)

* p < 0.001 vs Medical Therapy
Diabetes Surgery Study (DSS)

Multicenter clinical trial comparing gastric
  bypass surgery to intensive medical
  management in people with type 2
Participating centers: University of
  Minnesota, Columbia University, Mayo
  Clinic and University of Taiwan.
120 type 2 diabetic volunteers have been
  randomly assignment to treatment arm.
DSS (continued)

Primary endpoint: composite of A1c < 7.0%,
  LDL cholesterol < 100 mg/dl and systolic
  BP < 130 mmHg.
Postoperative Management After
       Bariatric Surgery
• Intake of 60-120 g protein daily
• After gastric bypass and duodenal
  switch, supplementation with:
     Multivitamin with folate and thiamine
     Vitamin B12
     Vitamin D
Suggested Schedule for Postoperative Monitoring(1)
                              Preop    1m      3m      6m     12 m    18 m    24 m Annual

    CBC, LFTs, glucose,         x       x       x       x       x       x       x        x
   creatinine, electrolytes
           Ferritin             x                       x       x       x       x        x

          Albumin               x                       x       x       x       x        x

           Folate               x                       x       x       x       x        x

         Vitamin B1             x               x       x       x       x       x        x

        Vitamin B12             x                       x       x       x       x        x

  Calcium, PTH, 25-OH D         x                       x       x       x       x        x

           DEXA                 x                               x               x        x

(1) Heber D, et al. Endocrine and Nutritional Management of the Post-Bariatric Surgery Patient:
    An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2010;95:4823.

50 year old man who had undergone roux-en-
  Y gastric bypass for obesity.
Preoperative weight was 140.5 kg and BMI
  41.2 kg/m2.
Following surgery, he lost 46 kg.
Two years after surgery, he started having
  episodes of transient loss of consciousness
  for which no explanation could be found.
David Test Results

          High Carb Meal       Low Carb Meal
          Glucose   Insulin   Glucose   Insulin
          (mg/dl)   (uU/L)    (mg/dl)   (uU/L)
Fasting     93         5        92         9
30 min     228       541        92        24
60 min      48       196        94        17
90 min      28        50        95        10
120 min     69        20        91        8
180 min     86        10        88        7
Post-Gastric Bypass
     Hyperinsulinemic Hypoglycemia
First described by GJ Service and colleagues (N Engl
   J Med 2005;353:249-54).
Six patients with postprandial neuroglycopenia after
   gastric bypass.
Mechanistic possibilities:
  1) Rapid absorption of ingested nutrients coupled
   with failure to adaptively decrease insulin secretion
   after gastric bypass-induced weight loss.
   2) Increase in beta cell mass post-gastric bypass
   induced by increased GLP-1 or other beta cell
   trophic peptides.
Hyperinsulinemic Hypoglycemic
  Developing Late After Gastric Bypass
     Bantle JP, et al. Obesity Surgery 2007:592-94.

Diagnostic criteria:
1) Postprandial hypolycemia with
   neuroglycopenia developing > 1 year after
   gastric bypass,
2) Spontaneous correction of hypoglycemia,
3) Normal fasting glucose and serum insulin,
4) Hyperinsulinemia at the time of
   hypoglycemia or, after a mixed meal,
   plasma glucose < 50 mg/dl and serum
   insulin > 50 uU/L.
Treatment of Post Gastric Bypass
   Hyperinsulinemic Hypoglycemia

• Low carbohydrate diet
• Acarbose with meals containing carbohydrate
• Glucose tablets (1 or 2) at first symptoms of
• Feeding through gastrostomy tube placed in
  remnant stomach
• Partial pancreatectomy
• Reversal of gastric bypass
Conclusions on Bariatric
 Surgery for Diabetes
Potential Benefits of Bariatric Surgery
• Weight loss: Duodenal Switch > Gastric
  Bypass > Laparoscopic Gastric Banding
• Reduced need for medications
• Improved diabetes control
• Remission of diabetes
• Improvements in blood pressure, blood lipids,
  sleep apnea, osteoarthritis, quality of life
• Reduced long-term mortality
Potential Risks of Bariatric Surgery
•   Perioperative (early) mortality rate of 0.02 - 0.9%
•   Anastomotic leaks
•   Wound infections
•   Thromboembolic events
•   Pneumonia
•   Late complications including nausea, vomiting,
    anastamotic ulcers, internal hernias, gallstones,
    oxalate nephropathy, dumping syndrome,
    nutritional deficiencies (iron, calcium, vitamins
    B1, B12, D) and, perhaps, hypoglycemia
NIH Consensus Development Panel
 Statement on Bariatric Surgery for Diabetes*

Should be considered only in people:
   1) who are motivated and well informed,
   2) in whom the operative risks are
   acceptable, and
   3) with BMI > 35 kg/m2.
Surgery should be performed by a surgeon with
   substantial experience in obesity surgery.
 * National Institutes of Health Consensus Development Panel.
  Gastointestinal surgery for severe obesity. Ann Intern Med 1991;115:956.
My Conclusions
Bariatric surgery should be considered in type
  2 diabetic patients with BMI > 35 kg/m2;
  patients with BMI 30-35 kg/m2 may also
  benefit but this has not been established.
Laparoscopic gastric bypass is the preferred
The earlier surgery is done the better;
  remission of diabetes is predicted by short
  duration of diabetes, need for few diabetes
  medications and high postprandial C-
Thanks For Your Attention
You can also read
Next slide ... Cancel