1
|
Muacevic A, Adler JR, Maliakkal BJ. Colovesical Fistula Complicating the First Symptomatic Episode of Acute Diverticulitis in a Young Adult. Cureus 2023; 15:e35082. [PMID: 36819951 PMCID: PMC9936830 DOI: 10.7759/cureus.35082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2023] [Indexed: 02/19/2023] Open
Abstract
Colovesical fistula is one of the known complications of acute diverticulitis. However, it is uncommon for a patient to present with a colovesical fistula without prior episodes of diverticulitis. In this case, we report a patient with acute diverticulitis presenting with a colovesical fistula with no antecedent history of any medical condition. The patient was treated with intravenous antibiotics and subsequently had a temporary laparoscopic colostomy. Although colovesical fistula caused by diverticular disease was once considered a relative contraindication to laparoscopic resection, this method is now being increasingly employed by experienced surgeons. Compared with laparoscopic colon resection surgery for uncomplicated diverticulitis, the minimally invasive treatment of colovesical fistula requires a longer operative time and advanced surgical skills.
Collapse
|
2
|
Kothadia JP, Patel V, Heda R, Angel WA, Vanar V, Maliakkal BJ, Verma R. Budd-Chiari Syndrome as an Initial Presentation of Non-Promyelocytic Acute Myelogenous Leukemia. Gastroenterology Res 2022; 15:148-154. [PMID: 35836706 PMCID: PMC9239495 DOI: 10.14740/gr1530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 05/12/2022] [Indexed: 11/16/2022] Open
Abstract
Budd-Chiari syndrome (BCS) is a rare disease characterized by hepatic venous outflow tract obstruction, frequently due to an underlying thrombophilic disorder. Acute myeloid leukemia rarely presents as acute BCS due to hyperfibrinolysis, hyperleukocytosis, nonspecific proteolytic activity, and disseminated intravascular coagulation causing acute hepatic vein thrombosis. In patients presenting with acute BCS with acute liver failure (ALF), a high index of suspicion and exclusion of underlying malignancy is a must, as it is a contraindication for liver transplantation. We report a case of a 19-year-old Caucasian male who presented with acute BCS causing ALF as an initial presentation of acute myelogenous leukemia.
Collapse
Affiliation(s)
- Jiten P. Kothadia
- James D. Eason Transplant Institute, University of Tennessee Health Science Center, Methodist University Hospital, Memphis, TN, USA
- Division of Transplant Surgery, Department of Surgery, University of Tennessee Health Science Center, Memphis, TN, USA
- Corresponding Author: Jiten P. Kothadia, James D. Eason Transplant Institute, University of Tennessee Health Science Center, Methodist University Hospital, Memphis, TN 38104, USA.
| | - Vanisha Patel
- Division of Gastroenterology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Rajiv Heda
- Division of Gastroenterology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | | | - Vishwas Vanar
- Advent Health Medical Group, Department of Gastroenterology/Hepatology, Advent Health Hospital Altamonte Springs, Altamonte Springs, FL, USA
| | | | - Rajanshu Verma
- Division of Gastroenterology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| |
Collapse
|
3
|
Wong F, Garcia-Tsao G, Rajender Reddy K, O’Leary JG, Kamath PS, Tandon P, Lai JC, Vargas HE, Biggins SW, Fallon MB, Thuluvath PJ, Maliakkal BJ, Subramanian R, Thacker L, Bajaj JS. Prognosis of hospitalized patients with cirrhosis and acute kidney disease. Liver Int 2022; 42:896-904. [PMID: 35023264 PMCID: PMC11075740 DOI: 10.1111/liv.15154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 12/05/2021] [Accepted: 12/25/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND The prognosis of acute kidney disease (AKD), defined as a glomerular filtration rate of <60 ml/min/1.73 m2 or a rise in serum creatinine (sCr) of <50% for <3 months, is not clearly known. AIM To study the prevalence, predictive factors and clinical outcomes in hospitalized cirrhotic patients with AKD. METHODS The North American Consortium for the Study of End-Stage Liver Disease prospectively enrolled hospitalized decompensated cirrhotic patients. Patients were separated into those with normal renal function (controls or C), AKD or stage 1 AKI as their worst renal dysfunction per International Club of Ascites definition and compared. Parameters assessed included demographics, laboratory data, haemodynamics, renal and patient outcomes. RESULTS 1244 patients with cirrhosis and ascites (C: 704 or 57%; AKD: 176 or 14%; stage 1 AKI: 364 or 29%) with similar demographics were enrolled. AKD patients had similar baseline sCr but higher hospital admission in the previous 6 months, and higher peak sCr, compared to controls, with their peak sCr being lower than that in stage 1 AKI patients (all P < .0001). The in-hospital and 30-day survival for AKD patients were intermediary between that for controls and stage 1 AKI patients (96% vs 91% vs 86%, P < .0001). The strongest predictors for AKD development while in hospital were the presence of a second infection (OR: 2.44) and diabetes (OR: 1.53). CONCLUSIONS Patients with AKD had intermediate outcomes between stage 1 AKI and controls. AKD patients, especially those with diabetes and a second infection, need careful monitoring and prompt treatment for AKD to prevent negative outcomes.
Collapse
Affiliation(s)
- Florence Wong
- Department of Medicine, Division of Gastroenterology & Hepatology, University of Toronto, Toronto, Ontario, Canada
| | - Guadalupe Garcia-Tsao
- Department of Medicine, Section of Digestive Diseases, Yale University School of Medicine, New Haven, Connecticut, USA
| | - K. Rajender Reddy
- Department of Medicine, Division of Gastroenterology & Hepatology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jacqueline G. O’Leary
- Department of Internal Medicine, Division of Gastroenterology, Dallas VA Hospital, Dallas, Texas, USA
| | - Patrick S. Kamath
- Division of Gastroenterology and Hepatology, College of Medicine and Science, Mayo Clinic, Rochester, Minnesota, USA
| | - Puneeta Tandon
- Department of Medicine, Division of Gastroenterology, University of Alberta, Edmonton, Alberta, Canada
| | - Jennifer C. Lai
- Department of Medicine, Division of Gastroenterology/Hepatology, University of California San Francisco, San Francisco, California, USA
| | - Hugo E. Vargas
- Division of Gastroenterology and Hepatology and Transplantation Center, Mayo Clinic Arizona, Scottsdale, Arizona, USA
| | - Scott W. Biggins
- Department of Medicine, Division of Gastroenterology, University of Washington Medical Center, Seattle, Washington, USA
| | - Michael B. Fallon
- Department of Medicine, Division of Transplant Hepatology, College of Medicine, University of Arizona, Phoenix, Arizona, USA
| | - Paul J. Thuluvath
- Division of Gastroenterology, Mercy Medical Center, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Benedict J. Maliakkal
- Department of Medicine, Division of Transplant Hepatology, University of Tennessee, Memphis, Tennessee, USA
| | - Ram Subramanian
- Department of Medicine, Division of Digestive Diseases, Emory University, Atlanta, Georgia, USA
| | - Leroy Thacker
- Department of Biostatistics, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Jasmohan S. Bajaj
- Department of Internal Medicine, Division of Gastroenterology, Hepatology and Nutrition, Virginia Commonwealth University, Richmond, Virginia, USA
| |
Collapse
|
4
|
Kreitman KR, Kothadia JP, Nair SP, Maliakkal BJ. Unexpected hepatitis B virus transmission after liver transplant from nucleic acid testing- and serology-negative liver donors who are hepatitis C viremic. Hepatol Res 2021; 51:1242-1246. [PMID: 34114715 DOI: 10.1111/hepr.13680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 06/02/2021] [Accepted: 06/06/2021] [Indexed: 01/15/2023]
Abstract
The opioid epidemic has led to increased availability of organs for liver transplantation. The success of direct-acting antiviral therapy for hepatitis C (HCV) has led to the acceptance of HCV viremic donor organs. Nucleic acid testing (NAT) has led to increased detection of HCV and hepatitis B (HBV) in potential donors. A total of 36 patients underwent liver transplantation from donation after brain death donors who were HCV NAT-positive, and three of them were diagnosed with HBV several months after. All three recipients received livers from HCV viremic donors who were negative for HBV by serology and NAT. Soon after liver transplantation, HCV was treated, and all achieved sustained virologic response. They became HBV DNA-positive shortly thereafter. To date, there have been no reported cases of unexpected HBV transmission since universal donor NAT was implemented in 2013. We postulate that the inhibitory effect of HCV viremia on HBV may have prolonged the "NAT window period" in these donors beyond the 20-22 days quoted for solitary HBV infection. These cases highlight the need for more intensive and prolonged screening for HBV in recipients of livers from HCV viremic donors.
Collapse
Affiliation(s)
- Kyle R Kreitman
- MUH James D. Eason Transplant Institute, University of Tennessee Health Sciences Center, Memphis, Tennessee, USA
| | - Jiten P Kothadia
- MUH James D. Eason Transplant Institute, University of Tennessee Health Sciences Center, Memphis, Tennessee, USA
| | - Satheesh P Nair
- MUH James D. Eason Transplant Institute, University of Tennessee Health Sciences Center, Memphis, Tennessee, USA
| | - Benedict J Maliakkal
- MUH James D. Eason Transplant Institute, University of Tennessee Health Sciences Center, Memphis, Tennessee, USA
| |
Collapse
|
5
|
Maliakkal BJ. Pathogenesis of non-alcoholic fatty liver disease and implications on cardiovascular outcomes in liver transplantation. Transl Gastroenterol Hepatol 2020; 5:36. [PMID: 32632387 DOI: 10.21037/tgh.2019.12.02] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 11/05/2019] [Indexed: 12/15/2022] Open
Abstract
Along with the obesity epidemic there has been a major increase in non-alcoholic fatty liver disease (NAFLD) prevalence, paralleling a steady increase in cirrhosis of the liver and hepatocellular cancer (HCC) related to NAFLD. Currently, NAFLD (related HCC and cirrhosis) is the second most common cause for liver transplantation (LT) and it is projected to take the top spot in the next 3-5 years. Patients with NAFLD cirrhosis and HCC have a unique set of comorbidities which potentially increases their risk for cardiovascular disease (CVD) and mortality. However, a review of the published data in NAFLD patients who undergo LT, does not paint a clear picture. While CVD is the most common cause of non-graft related mortality over the long-term, the short and intermediate-term survival post LT in NAFLD cirrhosis appears to be on par with other etiologies when age and comorbidities are factored. The cardiovascular complications are increased in the immediate post-transplant period but there is a shift from ischemic complications to arrhythmias and heart failure (HF). NAFLD recurs in 80-100% patients and occurs de novo in about 50% after LT, potentially impacting their long-term morbidity and mortality. This review summarizes the available data on CVD in NAFLD patients before and after LT, explains what is currently known about the epidemiology and pathogenesis of CVD in NAFLD and posits strategies to improve wait-list and post-transplant survival.
Collapse
|
6
|
Lawitz E, Landis CS, Flamm SL, Bonacini M, Ortiz-Lasanta G, Huang J, Zhang J, Kirby BJ, De-Oertel S, Hyland RH, Osinusi AO, Brainard DM, Robson R, Maliakkal BJ, Gordon SC, Gane EJ. Sofosbuvir plus ribavirin and sofosbuvir plus ledipasvir in patients with genotype 1 or 3 hepatitis C virus and severe renal impairment: a multicentre, phase 2b, non-randomised, open-label study. Lancet Gastroenterol Hepatol 2020; 5:918-926. [PMID: 32531259 DOI: 10.1016/s2468-1253(19)30417-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/24/2019] [Accepted: 11/05/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND There is a medical need for highly effective, safe, and well tolerated treatments for patients infected with hepatitis C virus (HCV) with severe renal impairment. We investigated the safety and efficacy of sofosbuvir with ribavirin or ledipasvir combined with sofosbuvir in a prospective study of patients with genotype 1 or 3 HCV infection and stage 4-5 chronic kidney disease (creatinine clearance by Cockcroft-Gault ≤30 mL/min) who were not on dialysis. METHODS This phase 2b, open-label, non-randomised, multicentre study in the USA and New Zealand investigated three sequentially enrolled cohorts of patients. Patients were recruited from ten hospitals and clinical research centres and were included if they had genotype 1 or 3 HCV infection, a creatinine clearance less than or equal to 30 mL/min, and were not on dialysis. In cohorts 1 and 2, patients received sofosbuvir (200 mg in cohort 1 and 400 mg in cohort 2) plus ribavirin 200 mg once per day for 24 weeks. In cohort 3, 18 patients received ledipasvir combined with sofosbuvir (90 mg ledipasvir and 400 mg sofosbuvir) once per day for 12 weeks. The primary efficacy endpoint was the proportion of patients achieving sustained virological response 12 weeks after the end of treatment (SVR12). Safety and pharmacokinetic data were also collected. The trial is registered with ClinicalTrials.gov, number NCT01958281, and is completed. FINDINGS This study was done between Oct 7, 2013, and Oct 29, 2017. In the sofosbuvir plus ribavirin cohorts, 32 patients were screened, of whom 20 were enrolled and assessed for efficacy and safety (ten patients in each cohort). In the ledipasvir plus sofosbuvir cohort, 33 patients were screened, of whom 18 were enrolled and assessed for treatment efficacy and safety. Four (40%, 95% CI 12-74) of ten patients in cohort 1 and six (60%, 26-88) of ten patients in cohort 2 achieved SVR12. All 18 (100%, 82-100) patients in cohort 3 achieved SVR12. Adverse events were mostly mild or moderate in severity. The most commonly reported adverse events overall were headache (eight [21%] of 38 patients), anaemia (seven [18%] of 38 patients), and fatigue (six [16%] of 38 patients). Eight patients had serious adverse events, none of which were treatment related. There were no treatment-related cardiac events or clinically significant changes in echocardiographic parameters or creatinine clearance by Cockcroft-Gault. INTERPRETATION In this phase 2b study, ledipasvir combined with sofosbuvir for 12 weeks was safe and effective in patients with genotype 1 HCV infection and stage 4-5 chronic kidney disease who were not on dialysis. FUNDING Gilead Sciences.
Collapse
Affiliation(s)
- Eric Lawitz
- Texas Liver Institute, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Charles S Landis
- Department of Medicine, University of Washington, Seattle, WA, USA
| | | | - Maurizio Bonacini
- Mission Gastroenterology and Hepatology, University of California, San Francisco, CA, USA
| | | | | | - Jie Zhang
- Gilead Sciences, Foster City, CA, USA
| | | | | | | | | | | | - Richard Robson
- Christchurch Clinical Studies Trust, Christchurch, New Zealand
| | | | | | | |
Collapse
|
7
|
Wong F, Reddy KR, O’Leary JG, Tandon P, Biggins SW, Garcia-Tsao G, Maliakkal BJ, Lai JC, Fallon MB, Vargas HE, Subramanian R, Thuluvath PJ, Kamath PS, Thacker L, Bajaj JS. Impact of Chronic Kidney Disease on Outcomes in Cirrhosis. Liver Transpl 2019; 25:870-880. [PMID: 30908855 PMCID: PMC11075743 DOI: 10.1002/lt.25454] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 03/01/2019] [Indexed: 02/07/2023]
Abstract
We hypothesize that the prevalence of chronic kidney disease (CKD) among patients with cirrhosis has increased due to the increased prevalence of CKD-associated comorbidities, such as diabetes. We aimed to assess the characteristics of hospitalized patients with cirrhosis with CKD and its impact on renal and patient outcomes. The North American Consortium for the Study of End-Stage Liver Disease (NACSELD) prospectively enrolled nonelectively admitted patients with cirrhosis and collected data on demographics, laboratory results, in-hospital clinical course, and postdischarge 3-month outcomes. CKD positive (CKD+) patients, defined as having an estimated glomerular filtration rate (eGFR; Modification of Diet in Renal Disease-4 variable formula) of ≤60 mL/minute for >3 months, were compared with chronic kidney disease negative (CKD-) patients for development of organ failures, hospital course, and survival. There were 1099 CKD+ patients (46.8% of 2346 enrolled patients) who had significantly higher serum creatinine (2.21 ± 1.33 versus 0.83 ± 0.21 mg/dL in the CKD- group) on admission, higher prevalence of nonalcoholic steatohepatitis cirrhosis etiology, diabetes, refractory ascites, and hospital admissions in the previous 6 months compared with the CKD- group (all P < 0.001). Propensity matching (n = 922 in each group) by Child-Pugh scores (9.78 ± 2.05 versus 9.74 ± 2.04, P = 0.70) showed that CKD+ patients had significantly higher rates of superimposed acute kidney injury (AKI; 68% versus 21%; P < 0.001) and eventual need for dialysis (11% versus 2%; P < 0.001) than CKD- patients. CKD+ patients also had more cases of acute-on-chronic liver failure as defined by the NACSELD group, which was associated with reduced 30- and 90-day overall survival (P < 0.001 for both). A 10 mL/minute drop in eGFR was associated with a 13.1% increase in the risk of 30-day mortality. In conclusion, patients with CKD should be treated as a high-risk group among hospitalized patients with cirrhosis due to their poor survival, and they should be monitored carefully for the development of superimposed AKI.
Collapse
Affiliation(s)
- Florence Wong
- Toronto General Hospital, University of Toronto, Toronto,
Ontario, Canada
| | | | | | | | | | | | | | | | | | | | | | | | | | - Leroy Thacker
- Department of Statistics, Commonwealth University of
Virginia, Richmond, VA
| | - Jasmohan S. Bajaj
- Commonwealth University of Virginia and McGuire VA
Medical Center, Richmond, VA
| |
Collapse
|
8
|
Affiliation(s)
- D Iser
- Department of Gastroenterology, St. Vincent's Hospital, Fitzroy, Victoria 3065, Australia
| | | | | | | | | |
Collapse
|
9
|
Alsolaiman MM, Reitz C, Nawras AT, Rodgers JB, Maliakkal BJ. Bouveret's syndrome complicated by distal gallstone ileus after laser lithotropsy using Holmium: YAG laser. BMC Gastroenterol 2002; 2:15. [PMID: 12086587 PMCID: PMC117132 DOI: 10.1186/1471-230x-2-15] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2002] [Accepted: 06/18/2002] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Bouveret's syndrome is an unusual presentation of duodenal obstruction caused by the passage of a large gallstone through a cholecystoduodenal fistula. Endoscopic therapy has been used as first-line treatment, especially in patients with high surgical risk. CASE PRESENTATION We report a 67-year-old woman who underwent an endoscopic attempt to fragment and retrieve a duodenal stone using a Holmium: Yttrium-Aluminum-Garnet Laser (Ho:YAG) which resulted in small bowel obstruction. The patient successfully underwent enterolithotomy without cholecystectomy or closure of the fistula. CONCLUSION We conclude that, distal gallstone obstruction, due to migration of partially fragmented stones, can occur as a possible complication of laser lithotripsy treatment of Bouveret's syndrome and might require urgent enterolithotomy.
Collapse
Affiliation(s)
- Mohammad M Alsolaiman
- Division of Gastroenterology, Department of Medicine, Albany Medical College and VA Stratton Hospital, Albany, New York, USA
| | - Christoph Reitz
- Division of Gastroenterology, Department of Medicine, Albany Medical College and VA Stratton Hospital, Albany, New York, USA
| | - Ali T Nawras
- Division of Gastroenterology, Department of Medicine, Albany Medical College and VA Stratton Hospital, Albany, New York, USA
| | - John B Rodgers
- Division of Gastroenterology, Department of Medicine, Albany Medical College and VA Stratton Hospital, Albany, New York, USA
| | - Benedict J Maliakkal
- Division of Gastroenterology, Department of Medicine, Albany Medical College and VA Stratton Hospital, Albany, New York, USA
| |
Collapse
|
10
|
Abstract
Zollinger-Ellison syndrome (ZES) and acromegaly are two hypersecretory states in which colorectal neoplasia has been described, but the incidence in the former condition may not be increased. We describe four patients with colorectal neoplasia associated with the ZES and review other published cases. Tissue ELISA with Adnab-9 antibody, a putative colorectal cancer risk marker, from a patient with ZES and from seven patients with acromegaly was compared to 13 controls at average risk for colorectal neoplasia. The patient with ZES without detectable colonic neoplasia and seven patients with acromegaly had increased binding of Adnab-9 in the colonic mucosa by ELISA. The difference was significant for the acromegaly patients compared to the controls (p < 0.05). The accumulated 34 instances of colorectal neoplasia in ZES patients suggests that this association may not be rare. Adnab-9 expression, detectable in both ZES and acromegaly, may reflect predisposition to colorectal neoplasia in both hyper-secretory states. Therefore, while a basis for association of colorectal neoplasia and hypergastrinemia exists, the clinical data are not compelling enough to warrant surveillance of patients with ZES. To resolve this problem, more definitive case control studies should be conducted.
Collapse
Affiliation(s)
- M Tobi
- Department of Medicine, Wayne State University School of Medicine, Detroit, Michigan, USA
| | | | | | | | | | | | | |
Collapse
|
11
|
Tobi M, Maliakkal BJ, Alousi MA, Voruganti V, Shafiuddin M, Yang S, Gesell MS, An T, Hatfield JS, Fligiel S. Cellular distribution of a colonic adenoma-associated antigen as defined by monoclonal antibody Adnab-9. Scand J Gastroenterol 1992; 27:737-42. [PMID: 1411278 DOI: 10.3109/00365529209011175] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Adenomatous colonic polyps constitute a precursor for colorectal cancer. Antibodies to these precancerous lesions might identify specific early tumor antigens. Adnab-9 is a murine monoclonal antibody raised against membranes of colonic adenomas. Adnab-9 binding in colonic washings (effluent) correlates with the presence of colorectal cancer. Immunohistochemical staining with Adnab-9 shows cytoplasmic reactivity in scattered cells in 4 of 31 adenomatous tissue sections, 0 of 14 sections of colorectal cancer cells, and 1 of 8 normal-appearing colonic mucosa specimens examined. Adnab-9 recognized a dominant M(r) 87,000 protein species in tissue extracts in the membrane-bound fraction of effluent by Western blotting. Adnab-9 binding by enzyme-linked immunosorbent assay in adenomatous extracts is higher than cancer or normal tissue, is membrane-bound, and is absent from established colorectal cancer cell lines. This distribution and nature of immunostaining suggest that Adnab-9 recognizes a determinant associated with the membrane component of a subpopulation of adenoma cells which may have a role in early colorectal neoplasia.
Collapse
Affiliation(s)
- M Tobi
- Dept. of Medicine, Veterans Affairs Medical Center, Allen Park, Michigan
| | | | | | | | | | | | | | | | | | | |
Collapse
|