Treatment of Ménétrier's Disease with a Monoclonal Antibody against the Epidermal Growth Factor Receptor
J. Steven Burdick, M.D., EunKyung Chung, Ph.D., Gordon Tanner, M.D., Mei Sun, M.D., June E. Paciga, B.S., Jin Q. Cheng, M.D., Ph.D., Kay Washington, M.D., Ph.D., James R. Goldenring, M.D., Ph.D., and Robert J. Coffey, M.D.
MÉnÉtrier's disease (hypoproteinemic hypertrophicgastropathy) is a rare, acquired, premalignant disorder of thestomach.1,2,3,4 It is characterized by giant hypertrophic foldsthat most often involve the fundus, excess mucus secretion,decreased acid secretion (hypochlorhydria), and hypoproteinemiadue to selective loss of serum proteins across the gastric mucosa.5,6The cause of Ménétrier's disease is unknown, althoughinfection with cytomegalovirus (CMV) in children and infectionwith Helicobacter pylori have been implicated.7,8 Symptoms includeepigastric pain, vomiting, edema, anorexia, and weight loss.Gastric cancer has been reported at diagnosis or during follow-upin patients with hypertrophic gastropathy. Evidence of the benefitsof anticholinergic drugs, acid suppression, octreotide, anderadication of H. pylori is inconsistent.2,9,10 Except in casesof CMV-associated Ménétrier's disease in children,11spontaneous remissions are rare. Partial or total gastrectomyis generally reserved for patients with debilitating diseaseand for cases in which there is concern over the developmentof gastric cancer.12
Increased signaling of the epidermal growth factor receptorhas been implicated in the pathogenesis of Ménétrier'sdisease.13 We recently cared for a patient with this disorderwho had not had a response to drug therapy. We hypothesizedthat the administration of a neutralizing monoclonal antibodyagainst the epidermal growth factor receptor might be of clinicalbenefit. After one day of treatment with this antibody, thepatient's nausea and vomiting decreased, and after one monththere was clinical and biochemical improvement, including anincrease in the serum albumin concentration and a decrease inthe loss of protein in the stool.
Case Report
A 48-year-old man presented with nausea, vomiting, edema upto the waist, and hypoalbuminemia in July 1998. A gastric analysisrevealed the secretion of a large volume of viscous gastricjuice with a pH of 7.0. An endoscopic evaluation showed enlargedgastric folds in the fundus, and snare biopsies of the fundusshowed foveolar hyperplasia (an expansion of surface mucouscells) and the absence of parietal cells. The results of a carbon-13urea breath test were normal, and the rate of basal secretionof gastric acid was 0 mmol of hydrogen in 30 minutes (as comparedwith the normal rate of 4.0 mmol of hydrogen per hour). Trialsof prochlorperazine, promethazine, ondansetron, lansoprazole,cisapride, octreotide, and glycopyrrolate did not alleviatethe patient's symptoms. He was not considered for gastrectomy,because of the risk associated with anesthesia and surgery asa result of his primary pulmonary hypertension. This conditionhad been diagnosed in 1993, at which time a continuous infusionof epoprostenol (prostacyclin) had been initiated. Reductionin the dose of epoprostenol did not ameliorate his symptoms.
Approval for compassionate use of a monoclonal antibody againstthe epidermal growth factor receptor (C225, ImClone Systems)was granted by the Food and Drug Administration and the institutionalreview boards of the University of Texas Southwestern MedicalCenter and the Vanderbilt University Medical Center, and thepatient gave informed written consent for a month-long courseof treatment with this antibody. Intravenous infusion was initiatedat a loading dose of 490 mg per square meter of body-surfacearea given over a two-hour period, followed by three weeklytreatments of 250 mg per square meter, each given over a two-hourperiod.
Results
After the initiation of treatment with antibody against theepidermal growth factor receptor, the patient's nausea and vomitingdecreased immediately. An actiniform eruption with pustularlesions and erythematous papules developed across his face andchest during the first week of treatment. These lesions respondedto topical clindamycin therapy.
One day after the initiation of treatment, the concentrationsof transforming growth factor increased by a factor of approximatelythree in serum and gastric juice (from 16 to 44 pg per milliliterand from 64 to 201 pg per milliliter, respectively), as determinedby radioimmunoassay. This increase provided evidence of effectiveblockade of the epidermal growth factor receptor.14
After one month of treatment, the patient's vomiting had decreasedfrom an average of 70 episodes to just over 1 episode per week(Table 1), and there was a marked improvement in the quality-of-lifescore. The serum albumin concentration had increased, and lossof protein through the stool had decreased. Repeated endoscopyshowed enlarged gastric folds, and biopsy revealed numerousparietal cells despite persistent foveolar hyperplasia (Figure 1).The pH of the gastric juice remained at 7.0.
Table 1. Clinical and Biochemical Findings in a Patient with Ménétrier's Disease before and during Treatment with a Monoclonal Antibody against the Epidermal Growth Factor Receptor.
Figure 1. Staining of Parietal Cells in the Fundic Mucosa of a Patient with Ménétrier's Disease before and after One Month of Treatment with a Monoclonal Antibody against the Epidermal Growth Factor Receptor.
In Panel A (x200), hematoxylin-and-eosin staining of a 10-µm section from a gastric fundic specimen obtained before treatment shows marked foveolar hyperplasia. In Panels B, C, and D, immunostaining for H+/K+ATPase was performed to identify parietal cells in the gastric mucosa. Biopsy specimens were stained with monoclonal antibody against the subunit of H+/K+ATPase (clone 12.18, at 1:5000)17 and then alkaline phosphataseconjugated goat antimouse IgG (with Vector Red substrate detection). The sections were counterstained with Mayer's hematoxylin. In Panel B (x200), a biopsy specimen obtained before treatment shows a complete absence of parietal cells. In Panels C (x200) and D (x400), a fundic-biopsy specimen shows numerous parietal cells near the base of the gastric fundic glands after one month of treatment, although foveolar hyperplasia is still present. The arrowheads in Panels C and D indicate the same immunostained parietal cell.
Protein extracts prepared from fundic-biopsy specimens obtainedby gastroscopy before and after one day and one month of treatmentwere analyzed by Western blotting with antibodies against theepidermal growth factor receptor, mitogen-associated proteinkinase, and Akt, a protein apparently involved in cell survival.There was a marked increase in the tissue content of the epidermalgrowth factor receptor after treatment (Figure 2A) afinding consistent with the reversal of receptor down-regulationafter receptor blockade. In addition, there was a marked decreasein the concentration of active phosphorylated mitogen-associatedprotein kinase but no change in the total kinase concentration.Activation of the mitogen-associated protein kinase pathwayhas been linked to increased proliferation of cells.
Figure 2. The Effect of a Monoclonal Antibody against the Epidermal Growth Factor Receptor (C225) on Selected Signaling Events in the Gastric Mucosa of a Patient with Ménétrier's Disease.
Gastric-biopsy specimens were obtained during upper endoscopy, and protein lysates were prepared. In Panel A, 40 µg of total protein was electrophoresed on a 12.5 percent denaturing polyacrylamide gel. After transfer to a nitrocellulose filter, the blots were probed sequentially with antibodies against the ectodomain of the epidermal growth factor receptor (mouse monoclonal IgG 31 G7 at 1:1000, Zymed Laboratories, South San Francisco), active phosphorylated and total mitogen-associated protein (MAP) kinase (both rabbit polyclonal at 1:1000, New England Biolabs, Beverly, Mass.), and active phosphorylated and total Akt (rabbit polyclonal anti-Ser473 Akt and anti-Akt antibodies at 1:1000, New England Biolabs). In Panel B (x400), sections of the gastric mucosa obtained after one month of treatment were dual-stained with antibodies against the subunit of H+/K+ATPase (clone 12.18, at 1:2000)17 and phosphorylated Akt (sheep polyclonal anti-Ser473 Akt at 1:500, Upstate Biotechnology, Lake Placid, N.Y.) and developed with Cy2- and Cy3-conjugated secondary antibodies, respectively (Jackson ImmunoResearch, West Grove, Pa.). Dual staining overlap is shown at right.
To examine this relation further, we determined the proliferativeindex in the fundic mucosa by immunostaining for Ki-67, a markerof actively dividing cells. The proliferative index, representingthe mean number of Ki-67positive surface mucous cellsper gastric glandular unit and obtained by averaging the countsin 10 glandular units, decreased from an average of 45 (range,20 to 65) before treatment to 5 (range, 0 to 15) in the biopsyspecimen obtained one day after the initiation of treatment.At one month, the proliferative index was 18 (range, 7 to 34).
A striking finding one month after the initiation of treatmentwas the emergence of parietal cells. Since gastrin is a trophicfactor for parietal cells, we measured serum gastrin concentrations,which increased from 82 to 425 pg per milliliter one day afterthe start of treatment and remained high (591 pg per milliliter)one month later. To examine the underlying molecular events,we measured the levels of fundic Akt. Total and active phosphorylatedAkt increased significantly one day after the initiation oftreatment, as determined by Western blot analysis (Figure 2A).This increase was correlated with increased Akt activity inthe fundus (data not shown). There was no detectable immunohistochemicalstaining for active phosphorylated Akt in the gastric-biopsyspecimens obtained one day before and one day after the initiationof treatment, but intense immunoreactivity was seen in newlyemergent parietal cells after one month of treatment (Figure 2B).Akt and H+/K+ATPase immunoreactivity colocalizedwithin parietal cells.
After one month of treatment, the patient was evaluated forheartlung transplantation. Unfortunately, he had cardiacarrest resulting from an anaphylactic reaction to the iodinatedradiographic contrast material given during a transjugular liverbiopsy, and he died suddenly. An autopsy was not performed.
Discussion
Transforming growth factor and the epidermal growth factorreceptor are produced in the stomach.18 Overproduction of transforminggrowth factor in the stomach could account for several of thefeatures of Ménétrier's disease, including decreasedacid production, increased hyperplasia of surface mucous cells,oxyntic atrophy, and increased mucin production.19,20,21,22Transgenic mice that overproduce transforming growth factor in the stomach have many of the features of Ménétrier'sdisease, including foveolar hyperplasia, increased mucin content,a reduced number of parietal cells, and decreased acid production.23,24Transforming growth factor , however, is one of six mammalianligands that bind to the epidermal growth factor receptor,25and increased production of any of these ligands may contributeto Ménétrier's disease. Our previous results andthe clinical and biochemical response to antibody against theepidermal growth factor receptor in this patient are evidencethat increased signaling of epidermal growth factor receptorhas a role in the pathogenesis of Ménétrier'sdisease.
Our current understanding of the differentiation of fundic glandularelements suggests that the cells of the gastric gland arisefrom a progenitor zone located in the upper neck region of thegland. This population of progenitor cells then gives rise totwo groups of cells with different life spans. Surface mucouscells with a life span of four to six days differentiate andmigrate toward the lumen. In contrast, the other glandular cells(parietal cells, chief cells, and enterochromaffin-like cells)migrate basally; their predicted life spans are in excess of60 to 100 days.26,27 In transgenic mice that overexpress transforminggrowth factor in the stomach, there is a selective expansionof surface mucous cells at the expense of other cell lineages.28Serum gastrin concentrations are inappropriately low in thesemice28 and in patients with Ménétrier's disease(unpublished data), despite an alkaline gastric pH, which isa potent stimulus for gastrin secretion.29 We speculate thatincreased signaling of the epidermal growth factor receptorin the presence of inappropriately low serum gastrin concentrationscontributes to the histologic features of Ménétrier'sdisease. The prompt and sustained increase in serum gastrinconcentrations after the administration of antibody againstepidermal growth factor receptor probably stimulates the productionof parietal cells.
There is no known association between primary pulmonary hypertensionand Ménétrier's disease.30,31 The long-term sideeffects of epoprostenol, which include nausea and vomiting,are dose-dependent and resolve with dose reduction. Our patient'sgastrointestinal symptoms did not resolve after the dose ofepoprostenol was decreased. There is no evidence at this timeto implicate the patient's long-term epoprostenol therapy inthe causation of Ménétrier's disease.
In this patient with Ménétrier's disease, systemicblockade of the epidermal growth factor receptor improved theclinical and biochemical features of the disease. Whether theseresults are reproducible and whether long-term treatment willbe effective are not known. In the future, this treatment couldbe combined with inhibition of tumor necrosis factor convertingenzyme, the enzyme that cleaves transforming growth factor at the cell surface,32 since this combined regimen results incooperative inhibition of the growth of mammary and colorectalcancer cells in vitro.33
Supported by grants from the National Institutes of Health (CA-46413,CA-77935, DK-48370, DK-43405, RR-00095, and RR-00633), a VeteransAffairs Merit review grant (to Dr. Goldenring), and fundingfrom the Joseph and Mary Keller Foundation and the Peter PowellMemorial Fund (to Dr. Coffey).
We are indebted to James E. Loyd and Katherine S. Meise fortheir incisive comments.
Source Information
From the Departments of Medicine and Pathology, University of Texas Southwestern Medical Center, Dallas (J.S.B.); the Departments of Pathology, Medicine, and Cell Biology, Vanderbilt University School of Medicine and Nashville Veterans Affairs Medical Center, Nashville (E.C., G.T., K.W., R.J.C.); the Department of Pathology, H. Lee Moffitt Cancer Center and Research Institute, University of South Florida College of Medicine, Tampa (M.S., J.E.P., J.Q.C.); and the Augusta Veterans Affairs Medical Center and Departments of Medicine, Surgery, and Cellular Biology and Anatomy, Institute of Molecular Medicine and Genetics, Medical College of Georgia, Augusta (J.R.G.).
Address reprint requests to Dr. Coffey at CC-2201 Medical Center North, Vanderbilt University, Nashville, TN 37232, or at coffeyrj{at}ctrvax.vanderbilt.edu.
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