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1.
Spinal Cord ; 55(7): 692-698, 2017 Jul.
Article in English | MEDLINE | ID: mdl-28195229

ABSTRACT

STUDY DESIGN: International expert working group. OBJECTIVES: To revise the International Spinal Cord Injury (SCI) Bowel Function Basic Data Set as a standardized format for the collecting and reporting of a minimal amount of information on bowel function in clinical practice and research. SETTING: Working group appointed by the American Spinal injury association (ASIA) and the International Spinal Cord Society (ISCoS). METHODS: The draft prepared by the working group was reviewed by the International SCI Data Set Committee and later by members of the ISCoS Executive and Scientific Committees and the ASIA board. The revised data set was posted on the ASIA and ISCoS websites for 1 month to allow further comments and suggestions. Changes resulting from a Delphi process among experts in children with SCI were included. Members of ISCoS Executive and Scientific Committees and the ASIA board made a final review and approved the data set. RESULTS: The International SCI Bowel Function Basic Data Set (Version 2.0) consists of the following 16 items: date of data collection, gastrointestinal and anal sphincter dysfunction unrelated to SCI, surgical procedures on the gastrointestinal tract, defecation method and bowel-care procedures, average time required for defecation, frequency of defecation, uneasiness, headache or perspiration during defecation, digital stimulation or evacuation of the anorectum, frequency of fecal incontinence, flatus incontinence, need to wear pad or plug, oral laxatives and prokinetics, anti-diarrheal agents, perianal problems, abdominal pain and discomfort and the neurogenic bowel dysfunction score. CONCLUSION: The International SCI Bowel Function Basic Data Set (Version 2.0) has been developed.


Subject(s)
Datasets as Topic , Gastrointestinal Diseases/etiology , Spinal Cord Injuries/complications , Data Collection/methods , Databases, Factual/standards , Datasets as Topic/standards , Digestive System Surgical Procedures , Gastrointestinal Agents/therapeutic use , Gastrointestinal Diseases/rehabilitation , Humans , Internationality , Spinal Cord Injuries/rehabilitation
2.
Dis Esophagus ; 28(7): 699-704, 2015 Oct.
Article in English | MEDLINE | ID: mdl-25224683

ABSTRACT

The effects of spinal cord injury (SCI) on esophageal motility are largely unknown. Furthermore, due to the complete or partial loss of sensory innervation to the upper gastrointestinal tract, a symptom-based diagnosis of esophageal dysmotility is problematic in the SCI population. To determine the prevalence and characterize the type of motility disorders observed in persons with chronic SCI compared with that of able-bodied (AB) controls based on esophageal pressure topography isometrics acquired by high-resolution manometry and categorized by application of the Chicago Classification. High-resolution manometry of the esophagus was performed in 39 individuals: 14 AB, 12 with paraplegia (level of injury between T4-T12) and 13 with tetraplegia (level of injury between C5-C7). A catheter containing multiple pressure sensors arranged at 360° was introduced into the esophagi of subjects at a distance that allowed visualization of both the upper esophageal sphincters (UES) and lower esophageal sphincters (LES). After a period to acquire pressures at baseline, subjects were asked to perform 10 wet swallows with 5-mL boluses of isotonic saline while esophageal pressure and impedance were being recorded. No significant differences were noted for gender, age, or body mass index between AB and SCI groups. Twenty-one of 25 (84%) subjects with SCI had at least one motility abnormality: 12% with Type II achalasia, 4% with Type III achalasia, 20% with esophagogastric junction outflow obstruction, 4% with the hypercontractile esophagus, and 48% with peristaltic abnormalities (weak peristalsis with small or large defects or frequent failed peristalsis). In contrast, only 7% (1 out of 14) of the AB subjects had any type of esophageal motility disorder. Despite the lack of subjective complaints and clinical awareness, esophageal dysmotility appears to be a highly prevalent condition in persons with SCI. The use of new and improved techniques, as well as a more stringent classification system, permitted the identification of the presence of nonspecific motility disorders in almost all SCI subjects, including four individuals who were previously undiagnosed with achalasia. Future work in persons with SCI is required to clarify the clinical impact of this observation and to study potential associations between esophageal dysmotility, gastroesophageal reflux disease, and pulmonary function. An increased awareness of esophageal dysfunction in the SCI population may lead to the development of new clinical guidelines for the diagnosis, prevention, and treatment of these largely unrecognized disorders.


Subject(s)
Esophageal Motility Disorders/epidemiology , Spinal Cord Injuries/complications , Aged , Electric Impedance , Esophageal Motility Disorders/diagnosis , Esophageal Motility Disorders/etiology , Esophageal Sphincter, Lower/physiopathology , Esophageal Sphincter, Upper/physiopathology , Humans , Manometry/methods , Middle Aged , Peristalsis/physiology , Pressure , Prevalence
3.
Spinal Cord ; 50(1): 81-4, 2012 Jan.
Article in English | MEDLINE | ID: mdl-21876549

ABSTRACT

STUDY DESIGN: Spinal cord injury (SCI) results in gastrointestinal (GI) complications, including gastroesophageal reflux disease and constipation, but much of the data is based on older technology. OBJECTIVE: GI transit times were determined in subjects with SCI using a new device called a SmartPill. Our principal goal was to assess whether this new technology can be applied in persons with SCI. METHODS: SCI and age- and gender-matched able-bodied (AB) control subjects not taking proton pump inhibitors were studied. Following an 8-h overnight fast, subjects consumed 120 g EggBeaters (60 kcal), two slices of white bread (120 kcal) and 30 g strawberry jam (74 kcal). A pH calibrated SmartPill capsule was swallowed with 8 ounces of water, after which subjects fasted for an additional 6 h prior to consuming an Ensure Plus nutrition shake (350 kcal). Subjects remained fasted for an additional 2 h, after which time they resumed their regular diets. RESULTS: Twenty subjects with SCI and 10 AB control subjects were studied. Data are expressed as mean±s.d. Comparing the group with SCI to the AB control group, gastric emptying time (GET), colonic transit time (CTT) and whole gut transit time (WGTT) were prolonged (GET: 10.6±7.2 vs 3.5±1.0 h, P<0.01; CTT: 52.3±42.9 vs 14.2±7.6 h, P=0.01; WGTT: 3.3±2.5 vs 1.0±0.7 days, P<0.01). No complications or side effects were reported. CONCLUSION: Our results indicate that the SmartPill technology is a safe, non-invasive assessment technique that provides valid diagnostic information in persons with SCI.


Subject(s)
Capsule Endoscopy/instrumentation , Capsule Endoscopy/methods , Gastrointestinal Diseases/diagnosis , Gastrointestinal Diseases/physiopathology , Gastrointestinal Motility/physiology , Spinal Cord Injuries/diagnosis , Spinal Cord Injuries/physiopathology , Adult , Aged , Female , Gastric Emptying/physiology , Gastrointestinal Diseases/etiology , Gastrointestinal Transit/physiology , Humans , Male , Middle Aged , Quadriplegia/diagnosis , Quadriplegia/etiology , Quadriplegia/physiopathology , Spinal Cord Injuries/etiology , Time Factors
4.
Dig Dis Sci ; 55(7): 2021-9, 2010 Jul.
Article in English | MEDLINE | ID: mdl-19834806

ABSTRACT

BACKGROUND: The outcome of colonoscopy is highly dependent upon the quality of bowel cleansing prior to the procedure. Oral sodium phosphate solutions (OSPS) or preparations containing polyethylene glycol (PEG) are generally employed. However, the safety of administering OSPS prior to colonoscopy has been questioned because of the potential for renal failure. AIM: To compare rates of renal failure after OSPS and PEG in a randomized, prospective trial and to assess the quality of colonoscopy after these two bowel preparations. METHODS: Subjects with eGFR >or= 60 ml/min/1.73 m(2) and expressed willingness to adhere to hydration recommendations were randomized to OSPS or PEG solutions. Renal function was assessed 1 week prior to, immediately prior to, and 1 week after colonoscopy. RESULTS: No subject had acute kidney failure after OSPS or PEG. OSPS was associated with significant increases in the serum phosphate and sodium levels and significant decreases in the calcium and potassium levels. These values returned to normal limits in all subjects by 1 week after colonoscopy. The quality of colonic cleansing was superior after OSPS than after PEG (Ottawa score 2.5 +/- 2.2 vs. 3.5 +/- 2.3, respectively, P < 0.05). The detection of one or more adenomatous polyps was higher after OSPS than after PEG. CONCLUSIONS: Renal failure was not detected after the use of OSPS for colonoscopy preparation in subjects with recently documented normal renal function who were able to consume the required amounts of water after each dose. However, based on the number of subjects studied, the theoretical risk of this complication is still between 0 and 6.3%. Thus, it is appreciated that only a very large prospective trial would have yielded a more accurate estimate of the likelihood of renal compromise after OSPS. Despite this caveat, OSPS has advantages over PEG in terms of the adequacy of colonic visualization and the number of polyps detected.


Subject(s)
Acute Kidney Injury/diagnosis , Cathartics/administration & dosage , Phosphates/administration & dosage , Polyethylene Glycols/adverse effects , Acute Kidney Injury/chemically induced , Aged , Aged, 80 and over , Analysis of Variance , Cathartics/adverse effects , Chi-Square Distribution , Colonoscopy/methods , Female , Follow-Up Studies , Humans , Kidney Function Tests , Male , Middle Aged , Phosphates/adverse effects , Polyethylene Glycols/administration & dosage , Probability , Prospective Studies , Risk Assessment , Safety Management , Statistics, Nonparametric , Treatment Outcome
5.
Aliment Pharmacol Ther ; 30(11-12): 1110-7, 2009 Dec 01.
Article in English | MEDLINE | ID: mdl-19769634

ABSTRACT

BACKGROUND: As difficulty with evacuation is a common occurrence in individuals with spinal cord injury, preparation prior to colonoscopy may be suboptimal and, perhaps, more hazardous. AIM: To assess the safety and efficacy of bowel cleansing regimens in persons with spinal cord injury. METHODS: Randomized, prospective, single blind study comparing polyethylene glycol (PEG), oral sodium phosphosoda (OSPS) and combination of both for colonic preparation prior to colonoscopy in subjects with spinal cord injury. RESULTS: Thirty six subjects with eGFR > or =60 mL/min/1.73 m(2) were randomized to PEG or OSPS or PEG+OSPS. Regardless of bowel preparation employed, >73% of subjects had unacceptable colonic cleansing. No subject in the OSPS preparation group demonstrated a decrease in eGFR or an increase in serum creatinine concentration from the baseline. OSPS and PEG+OSPS preparations caused a transient change in serum potassium, phosphate and calcium concentrations, but no change in electrolytes was noted in the PEG group. CONCLUSIONS: Neither OSPS alone, PEG alone nor their combination was sufficient to prepare adequately the bowel for colonoscopy in most patients with spinal cord injury. However, administration of OSPS and/or PEG appears to be safe in the spinal cord injury population, provided adequate hydration is provided.


Subject(s)
Cathartics/adverse effects , Colon/pathology , Colonic Neoplasms/diagnosis , Creatinine/blood , Kidney/drug effects , Polyethylene Glycols/adverse effects , Spinal Injuries/complications , Adult , Aged , Colonoscopy/methods , Early Detection of Cancer/methods , Female , Humans , Male , Middle Aged , Preoperative Care , Single-Blind Method , Therapeutic Irrigation/methods
6.
Aliment Pharmacol Ther ; 27(1): 41-7, 2008 Jan 01.
Article in English | MEDLINE | ID: mdl-17956596

ABSTRACT

BACKGROUND: Rare cases of nephrotoxicity have been reported with oral sodium phosphate solution (OSPS). AIM: To evaluate whether OSPS is associated with changes in renal function. METHODS: A chart review performed on 311 patients who had colonoscopy at the James J. Peters VA Medical Centre prepared with either OSPS (n = 157) or polyethylene glycol (PEG) (n = 154). Patients had a baseline serum creatinine or=50% increase above their baseline creatinine was similar (OSPS vs. PEG, 5% vs. 3%, P = 0.77). CONCLUSIONS: Oral sodium phosphate solution was associated with a slight increase in serum creatinine, which was not clinically significant. Renal toxicity from OSPS appears to be minimal when used in patients with serum creatinine value <1.5 mg/dL.


Subject(s)
Cathartics/adverse effects , Colonoscopy/adverse effects , Kidney/drug effects , Phosphates/adverse effects , Polyethylene Glycols/adverse effects , Acute Kidney Injury/chemically induced , Aged , Colonoscopy/methods , Creatinine/blood , Female , Humans , Male , Middle Aged , Phosphates/administration & dosage , Regression Analysis , Retrospective Studies , Therapeutic Irrigation
7.
Adv Med Sci ; 52: 76-82, 2007.
Article in English | MEDLINE | ID: mdl-18217394

ABSTRACT

Summary receiver operating characteristics (sROC) analysis is a recently developed statistical technique that can be applied to meta-analysis of diagnostic tests. This technique can overcome some of the limitations associated with pooling the sensitivities and specificities of published studies. The sROC curve is initially constructed by plotting the sensitivity (true positivity) and false positivity (1 - specificity) of each study. After mathematical manipulation of the true and false positivities, linear regression is performed to calculate the slope and y-intercept. These coefficients are then entered into the sROC equation to generate the sROC curve. There are three commonly used methods to assess the accuracy of the test: the exact area under the curve (AUC) for the sROC function, the homogeneous AUC, and the index Q*. Statistical formulas can compare these values from different diagnostic tests. With the introduction of sROC software and better understanding of this method, the application of sROC analysis should continue to increase.


Subject(s)
Chemistry, Clinical/methods , Radiology/methods , Area Under Curve , Artifacts , Data Interpretation, Statistical , Diagnostic Techniques and Procedures , False Positive Reactions , Humans , Observer Variation , Polyps/diagnosis , Polyps/diagnostic imaging , ROC Curve , Radiography , Reproducibility of Results , Sensitivity and Specificity
8.
Z Gastroenterol ; 44(12): 1223-6, 2006 Dec.
Article in English | MEDLINE | ID: mdl-17163372

ABSTRACT

Accessory lobes of the liver (ALL) may be congenital or acquired and are usually of no clinical significance. Torsions of the ALL are exceedingly rare and most are incidental findings at laparotomy, autopsy and in the course of investigation radiological investigations. A total of 17 infant and adult cases have been described previously in the medical literature. Most cases described since 1925 have been diagnosed at laparotomy, we report the 18th case of torsion of the accessory lobe of the liver in an elderly female which, despite all radiological interventions, required laparoscopy for diagnosis. We conclude that torsion of the accessory lobes of the liver is a rare finding; radiological imaging does not reveal the diagnosis and most are found at laparotomy. Laparoscopy may aid in the diagnosis of torsion of accessory liver lobes. If pain persists, we advocate the use surgical intervention with or without cholecystectomy.


Subject(s)
Infarction/diagnosis , Ischemia/diagnosis , Liver Diseases/diagnosis , Liver/abnormalities , Liver/blood supply , Abdominal Pain/etiology , Aged , Cholangiopancreatography, Endoscopic Retrograde , Cholecystectomy , Diagnosis, Differential , Female , Hepatectomy , Humans , Infarction/pathology , Infarction/surgery , Ischemia/pathology , Ischemia/surgery , Laparoscopy , Liver/pathology , Liver/surgery , Liver Diseases/pathology , Liver Diseases/surgery , Liver Function Tests , Predictive Value of Tests , Recurrence , Tomography, X-Ray Computed , Torsion Abnormality/diagnosis , Torsion Abnormality/pathology , Torsion Abnormality/surgery
9.
Adv Med Sci ; 51: 15-22, 2006.
Article in English | MEDLINE | ID: mdl-17357271

ABSTRACT

Bowel problems after SCI can be debilitating. Colonic inertia as a result of decreased parasympathetic (S2-4) stimulation of the left colon and rectosigmoid seems to be the principal abnormality accounting for DWE. The conventional measures used for decades have poor results in many people. Neostigmine, an anticholinesterase inhibitor, appears to be a more physiological agent for these individuals. The combination of neostigmine + glycopyrrolate infusion has shown encouraging results after intravenous administration and studies are under way to assess the efficacy of neostigmine by other routes.


Subject(s)
Colonic Diseases, Functional/drug therapy , Constipation/drug therapy , Spinal Cord Injuries/complications , Colon/drug effects , Colon/physiopathology , Colonic Diseases, Functional/etiology , Constipation/etiology , Drug Therapy, Combination , Glycopyrrolate/therapeutic use , Humans , Neostigmine/therapeutic use
10.
Pancreas ; 23(1): 89-93, 2001 Jul.
Article in English | MEDLINE | ID: mdl-11451153

ABSTRACT

Production of nitric oxide (NO) by inducible nitric oxide synthase (iNOS) has been proposed as a pathogenic factor in acute pancreatitis, but its role has still not been fully examined. The present study explored the role of iNOS in cerulein-induced acute pancreatitis using iNOS-deficient mice. Twelve- to 14-week-old male mice (C57B1/6 and iNOS-deficient) were administered cerulein by intraperitoneal (i.p.) injection at hourly intervals for 7 hours and killed 24 hours later after the first dose. Pancreatic wet weight, pancreatic myeloperoxidase (MPO) activity, and levels of plasma nitrite and serum amylase were measured. In another experiment isosorbide dinitrate (an NO donor) was given by oral gavage every 6 hours for 24 hours beginning simultaneously with cerulein injections in iNOS-deficient mice. Cerulein administration dose-dependently increased pancreatic wet weight, myeloperoxidase activity, and levels of nitrite and amylase in C57B1/6 mice. These parameters (except nitrite levels) were significantly intensified in iNOS-deficient mice. At the dose employed, cerulein failed to increase nitrite levels in iNOS-deficient mice. The susceptibility to cerulein toxicity in iNOS-deficient mice was abolished by NO donor treatment. NO release from an iNOS source appears to play a protective role in cerulein-induced pancreatitis. At least in part, NO may prevent neutrophil accumulation after cerulein administration.


Subject(s)
Ceruletide/toxicity , Nitric Oxide Synthase/physiology , Pancreatitis/chemically induced , Acute Disease , Amylases/blood , Animals , Genetic Predisposition to Disease , Injections, Intraperitoneal , Isosorbide Dinitrate/pharmacology , Isosorbide Dinitrate/therapeutic use , Male , Mice , Mice, Inbred C57BL , Mice, Knockout , Neutrophils/enzymology , Neutrophils/pathology , Nitric Oxide Donors/pharmacology , Nitric Oxide Donors/therapeutic use , Nitric Oxide Synthase/deficiency , Nitric Oxide Synthase/genetics , Nitric Oxide Synthase Type II , Nitrites/blood , Pancreatitis/blood , Pancreatitis/genetics , Peroxidase/analysis
11.
Digestion ; 63(2): 102-7, 2001.
Article in English | MEDLINE | ID: mdl-11244248

ABSTRACT

Nicotine intensifies experimental gastric ulceration by reducing gastric mucosal blood flow (GMBF) and mucus. As both these parameters can be improved by nitric oxide (NO), we evaluated the impact of a NO donor in ethanol-induced gastric mucosal injury in rats administered nicotine. A nicotine solution or water was administered for 20 days to Sprague-Dawley rats. NO donor (isosorbide dinitrate) was given 60 and 10 min before preparation of ex vivo gastric chambers and exposure to ethanol. Chronic nicotine intake significantly reduced GMBF and gastric mucus content. Nicotine intensifies ethanol-induced gastric injury and short-term administration of NO donor failed to antagonize the ulcerogenic action from either nicotine or alcohol. In another study, rats drank nicotine solution for 20 days, after which the nicotine was withdrawn and replaced by water for 10 additional days. NO donor was provided during these last 10 days. The gastric effects of nicotine persisted for at least 10 days after nicotine was withdrawn but then these effects could be abolished by prolonged NO treatment. Nicotine reduces plasma nitrite level, but gastric mucosal MPO activity remained unchanged. Our data suggest that nicotine cessation plus a longer period of NO donor administration can completely abolish the gastric effects of nicotine.


Subject(s)
Gastric Mucosa/drug effects , Isosorbide Dinitrate/pharmacology , Nicotine/pharmacology , Analysis of Variance , Animals , Blood Flow Velocity/drug effects , Ethanol/toxicity , Gastric Mucins/drug effects , Gastric Mucins/metabolism , Gastric Mucosa/blood supply , Male , Nitrites/blood , Peroxidase/metabolism , Rats , Rats, Sprague-Dawley , Regional Blood Flow/drug effects , Stomach Ulcer/chemically induced
12.
Gastroenterology ; 118(4): 780-94, 2000 Apr.
Article in English | MEDLINE | ID: mdl-10734030

ABSTRACT

BACKGROUND & AIMS: Activated pancreatic stellate cells have recently been implicated in pancreatic fibrogenesis. This study examined the role of pancreatic stellate cells in alcoholic pancreatic fibrosis by determining whether these cells are activated by ethanol itself and, if so, whether such activation is caused by the metabolism of ethanol to acetaldehyde and/or the generation of oxidant stress within the cells. METHODS: Cultured rat pancreatic stellate cells were incubated with ethanol or acetaldehyde. Activation was assessed by cell proliferation, alpha-smooth muscle actin expression, and collagen synthesis. Alcohol dehydrogenase (ADH) activity in stellate cells and the influence of the ADH inhibitor 4-methylpyrazole (4MP) on the response of these cells to ethanol was assessed. Malondialdehyde levels were determined as an indicator of lipid peroxidation. The effect of the antioxidant vitamin E on the response of stellate cells to ethanol or acetaldehyde was also examined. RESULTS: Exposure to ethanol or acetaldehyde led to cell activation and intracellular lipid peroxidation. These changes were prevented by the antioxidant vitamin E. Stellate cells exhibited ethanol-inducible ADH activity. Inhibition of ADH by 4MP prevented ethanol-induced cell activation. CONCLUSIONS: Pancreatic stellate cells are activated on exposure to ethanol. This effect of ethanol is most likely mediated by its metabolism (via ADH) to acetaldehyde and the generation of oxidant stress within the cells.


Subject(s)
Ethanol/pharmacology , Pancreas/drug effects , Pancreas/pathology , Acetaldehyde/pharmacology , Actins/metabolism , Animals , Ascorbic Acid/pharmacology , Cell Division/drug effects , Cells, Cultured , Collagen/biosynthesis , Drug Combinations , Ethanol/metabolism , Ferric Compounds/pharmacology , Fibrosis , Lipid Peroxides/metabolism , Malondialdehyde/metabolism , Muscle, Smooth/metabolism , Oxidative Stress , Pancreas/metabolism , Rats
13.
Gastrointest Endosc ; 51(2): 199-201, 2000 Feb.
Article in English | MEDLINE | ID: mdl-10650268

ABSTRACT

BACKGROUND: It is difficult to study human colonic motility under physiologic conditions. An important limitation associated with prolonged colonic recording is the failure of the sensors to resist normal expulsive forces. METHOD: In this article we describe a method of endoscopically positioning a manometric catheter by using clips in conjunction with a solid-state catheter. With the use of a rotatable clip-fixing device loaded on to a colonoscope, the manometric catheter was clipped to the colonic mucosa. RESULTS: Recordings for up to 120 hours were obtained from 6 subjects without apparent migration of the catheter assembly. No complications were noted, the catheter does not interfere with defecation, and defecation does not result in its expulsion. CONCLUSION: The current technique will allow reliable ambulatory measurements over prolonged periods of time in relatively comfortable and unrestrained subjects. This technique should increase our understanding of normal and abnormal colonic motility.


Subject(s)
Colon/physiology , Colonoscopy , Gastrointestinal Motility , Manometry/methods , Monitoring, Ambulatory/methods , Female , Humans , Male , Manometry/instrumentation , Middle Aged , Monitoring, Ambulatory/instrumentation
14.
Am J Gastroenterol ; 94(3): 790-4, 1999 Mar.
Article in English | MEDLINE | ID: mdl-10086667

ABSTRACT

OBJECTIVE: It is unclear why some alcohol abusers develop alcoholic cirrhosis whereas others contract chronic pancreatitis. The aim of this study was to examine the importance of race as a risk factor for the development of chronic pancreatitis. METHODS: We compared the racial status of 1883 patients discharged with a first-listed diagnosis of two diseases strongly related to alcohol abuse: 433 patients with chronic pancreatitis (ICD 5771) and 1450 patients with alcoholic cirrhosis (ICD 5712). Information came from discharge statistics maintained by two acute care hospitals in New York City and one acute care hospital in Lisbon, Portugal. The study period included the years 1989-1996 in the US and 1989-1994 in Portugal. RESULTS: A total of 215 (50%) of the 433 chronic pancreatitis patients were black compared with 333 (23%) of the 1450 patients with alcoholic cirrhosis. When adjusted for sex and hospital site, patients with pancreatitis were significantly more likely to be black than patients with cirrhosis (odds ratio 2.5, 95% confidence interval 1.9-3.2, p < 0.001). CONCLUSIONS: In comparison with white patients, black patients are two to three times more likely to be hospitalized for chronic pancreatitis than alcoholic cirrhosis. This highly significant (p < 0.001) difference was observed in both men and women: in three different hospitals, and in two different countries. The explanation is unknown, but could be related to racial differences in diet, type or quantity of alcohol consumption, smoking, or ability to detoxify substances harmful to the liver or pancreas.


Subject(s)
Black People , Pancreatitis, Alcoholic/ethnology , White People , Adult , Chronic Disease , Female , Humans , Liver Cirrhosis, Alcoholic/ethnology , Male , Middle Aged , New York City/epidemiology , Portugal/epidemiology , Risk Factors
15.
Gut ; 44(4): 534-41, 1999 Apr.
Article in English | MEDLINE | ID: mdl-10075961

ABSTRACT

BACKGROUND: The pathogenesis of pancreatic fibrosis is unknown. In the liver, stellate cells play a major role in fibrogenesis by synthesising increased amounts of collagen and other extracellular matrix (ECM) proteins when activated by profibrogenic mediators such as cytokines and oxidant stress. AIMS: To determine whether cultured rat pancreatic stellate cells produce collagen and other ECM proteins, and exhibit signs of activation when exposed to the cytokines platelet derived growth factor (PDGF) or transforming growth factor beta (TGF-beta). METHODS: Cultured pancreatic stellate cells were immunostained for the ECM proteins procollagen III, collagen I, laminin, and fibronectin using specific polyclonal antibodies. For cytokine studies, triplicate wells of cells were incubated with increasing concentrations of PDGF or TGF-beta. RESULTS: Cultured pancreatic stellate cells stained strongly positive for all ECM proteins tested. Incubation of cells with 1, 5, and 10 ng/ml PDGF led to a significant dose related increase in cell counts as well as in the incorporation of 3H-thymidine into DNA. Stellate cells exposed to 0.25, 0.5, and 1 ng/ml TGF-beta showed a dose dependent increase in alpha smooth muscle actin expression and increased collagen synthesis. In addition, TGF-beta increased the expression of PDGF receptors on stellate cells. CONCLUSIONS: Pancreatic stellate cells produce collagen and other extracellular matrix proteins, and respond to the cytokines PDGF and TGF-beta by increased proliferation and increased collagen synthesis. These results suggest an important role for stellate cells in pancreatic fibrogenesis.


Subject(s)
Cytokines/pharmacology , Extracellular Matrix Proteins/metabolism , Pancreas/pathology , Actins/metabolism , Animals , Cell Culture Techniques , Cell Division , Collagen/biosynthesis , Fibrosis , Immunoenzyme Techniques , Pancreas/metabolism , Platelet-Derived Growth Factor/pharmacology , Rats , Transforming Growth Factor beta/pharmacology
16.
J Lab Clin Med ; 132(4): 294-302, 1998 Oct.
Article in English | MEDLINE | ID: mdl-9794700

ABSTRACT

It has been postulated that ethanol-induced pancreatic injury may be mediated by the oxidation of ethanol within the pancreas with secondary toxic metabolic changes, but there is little evidence of pancreatic ethanol oxidation. The aims of this study were to determine whether pancreatic acinar cells metabolize significant amounts of ethanol and, if so, to compare their rate of ethanol oxidation to that of hepatocytes. Cultured rat pancreatic acinar cells and hepatocytes were incubated with 5 to 50 mmol/L carbon 14-labeled ethanol (25 dpm/nmol). Ethanol oxidation was calculated from the production of 14C-labeled acetate that was isolated by Dowex ion-exchange chromatography. Ethanol oxidation by pancreatic acinar cells was demonstrable at all ethanol concentrations tested. At an intoxicating ethanol concentration (50 mmol/L), 14C-labeled acetate production (227+/-20 nmol/10(6) cells/h) approached that of hepatocytes (337+/-61 nmol/10(6) cells/h). Phenanthroline (an inhibitor of classes I through III isoenzymes of alcohol dehydrogenase (ADH)) inhibited pancreatic ethanol oxidation by 90%, but 4-methylpyrazole (a class I and II ADH inhibitor), carbon monoxide (a cytochrome P450 inhibitor), and sodium azide (a catalase inhibitor) had no effect. This study has shown that pancreatic acinar cells oxidize significant amounts of ethanol. At intoxicating concentrations of ethanol, pancreatic acinar cell ethanol oxidation may have the potential to contribute to pancreatic cellular injury. The mechanism appears to involve the class III isoenzyme of ADH.


Subject(s)
Ethanol/metabolism , Pancreas/metabolism , Acetates/metabolism , Alcohol Dehydrogenase/antagonists & inhibitors , Amylases/metabolism , Animals , Carbon Radioisotopes , Cells, Cultured/drug effects , Ceruletide/pharmacology , Cytoplasmic Granules/ultrastructure , Endoplasmic Reticulum, Rough/ultrastructure , Ethanol/pharmacology , Immunohistochemistry , Liver/drug effects , Liver/metabolism , Male , Oxidation-Reduction , Pancreas/cytology , Pancreas/drug effects , Phenanthrolines/pharmacology , Protease Inhibitors/pharmacology , Rats , Rats, Sprague-Dawley
17.
Gut ; 43(1): 128-33, 1998 Jul.
Article in English | MEDLINE | ID: mdl-9771417

ABSTRACT

BACKGROUND: The pathogenesis of pancreatic fibrosis is unknown. In the liver, stellate cells (vitamin A storing cells) play a significant role in the development of fibrosis. AIMS: To determine whether cells resembling hepatic stellate cells are present in rat pancreas, and if so, to compare their number with the number of stellate cells in the liver, and isolate and culture these cells from rat pancreas. METHODS: Liver and pancreatic sections from chow fed rats were immunostained for desmin, glial fibrillary acidic protein (GFAP), and alpha smooth muscle actin (alpha-SMA). Pancreatic stellate shaped cells were isolated using a Nycodenz gradient, cultured on plastic, and examined by phase contrast and fluorescence microscopy, and by immunostaining for desmin, GFAP, and alpha-SMA. RESULTS: In both liver and pancreatic sections, stellate shaped cells were observed; these were positive for desmin and GFAP and negative for alpha-SMA. Pancreatic stellate shaped cells had a periacinar distribution. They comprised 3.99% of all pancreatic cells; hepatic stellate cells comprised 7.94% of all hepatic cells. The stellate shaped cells from rat pancreas grew readily in culture. Cells cultured for 24 hours had an angular appearance, contained lipid droplets manifesting positive vitamin A autofluorescence, and stained positively for desmin but negatively for alpha-SMA. At 48 hours, cells were positive for alpha-SMA. CONCLUSIONS: Cells resembling hepatic stellate cells are present in rat pancreas in a number comparable with that of stellate cells in the liver. These stellate shaped pancreatic cells can be isolated and cultured in vitro.


Subject(s)
Liver/cytology , Pancreas/cytology , Animals , Cell Culture Techniques , Cell Separation , Coloring Agents , Desmin , Glial Fibrillary Acidic Protein , Immunohistochemistry , Male , Microscopy, Fluorescence , Microscopy, Phase-Contrast , Rats , Rats, Sprague-Dawley
18.
J Spinal Cord Med ; 21(1): 21-4, 1998 Jan.
Article in English | MEDLINE | ID: mdl-9541883

ABSTRACT

The efficacies of four bowel care regimens (bisacodyl suppositories, glycerin suppositories, mineral oil enemas and docusate sodium mini-enemas) were compared in seven subjects with traumatic spinal cord injury. Efficacy was assessed in terms of colonic transit time, bowel evacuation time and subjective responses to a questionnaire. Both docusate sodium mini-enemas and mineral oil enemas decreased total and left-sided colonic transit time. However, docusate sodium mini-enemas were superior to mineral oil enemas in terms of the decrease in bowel evacuation time and symptom reduction. Results in this small group of subjects suggest that docusate sodium mini-enemas may have advantages in the management of bowel evacuation in individuals with spinal cord injury.


Subject(s)
Cathartics/administration & dosage , Gastrointestinal Diseases/etiology , Gastrointestinal Diseases/therapy , Spinal Cord Injuries/complications , Adult , Aged , Bisacodyl/administration & dosage , Bisacodyl/therapeutic use , Cathartics/therapeutic use , Colon/drug effects , Colon/physiopathology , Defecation/drug effects , Dioctyl Sulfosuccinic Acid/adverse effects , Dioctyl Sulfosuccinic Acid/therapeutic use , Enema , Gastrointestinal Diseases/physiopathology , Gastrointestinal Transit/drug effects , Glycerol/administration & dosage , Glycerol/therapeutic use , Humans , Male , Middle Aged , Mineral Oil/administration & dosage , Mineral Oil/therapeutic use , Suppositories , Surveys and Questionnaires , Time Factors
19.
Biochim Biophys Acta ; 1336(1): 89-98, 1997 Jul 19.
Article in English | MEDLINE | ID: mdl-9271254

ABSTRACT

Postulated mechanisms of alcoholic pancreatitis include (i) zymogen granule fragility facilitating intracellular activation of digestive enzymes and (ii) ductular obstruction by protein plugs. GP2, a pancreatic glycoprotein, stabilizes zymogen granule membranes and is an important constituent of pancreatic protein plugs. Therefore, this study examined the pancreatic content and messenger RNA levels of GP2 after chronic ethanol administration. Rats were fed liquid diets with or without ethanol, for four weeks. GP2 levels in pancreatic homogenates, crude zymogen granules and zymogen granule membrane fractions were assessed by immunoblotting. Messenger RNA levels for GP2 were measured by Northern and dot blotting of pancreatic RNA. Pancreatic GP2 levels were lower in ethanol-fed rats than in controls (GP2 levels expressed as % of control: 38.75 +/- 5.8, p < 0.001 in homogenate; 31.28 +/- 3.5, p < 0.0005 in crude zymogen granules and 22.89 +/- 5.4, p < 0.0005 in zymogen granule membranes). Messenger RNA levels for GP2 were unchanged after ethanol feeding. Chronic ethanol consumption decreases GP2 content of pancreatic homogenate and zymogen granules. This decrease could (i) result from an increased release into pancreatic juice thereby favouring protein plug formation and (ii) impair zymogen granule stability. Both these mechanisms could potentiate pancreatic damage.


Subject(s)
Ethanol/pharmacology , Pancreas/drug effects , Phosphorylases/metabolism , Animals , Blotting, Northern , Ethanol/administration & dosage , Male , Pancreas/enzymology , Phosphorylases/genetics , RNA, Messenger/genetics , RNA, Messenger/metabolism , Rats , Rats, Sprague-Dawley
20.
Alcohol Health Res World ; 21(1): 13-20, 1997.
Article in English | MEDLINE | ID: mdl-15706759

ABSTRACT

Pancreatitis is a potentially fatal inflammation of the pancreas often associated with long-term alcohol consumption. Symptoms may result from blockage of small pancreatic ducts as well as from destruction of pancreatic tissue by digestive enzymes. In addition, by-products of alcohol metabolism within the pancreas may damage cell membranes. Research on the causes of pancreatitis may support more effective disease management and provide hope for a potential cure.


Subject(s)
Alcohol Drinking/physiopathology , Pancreas/physiopathology , Pancreatitis, Alcoholic/physiopathology , Pancreatitis, Alcoholic/therapy , Alcohol Drinking/adverse effects , Alcohol Drinking/therapy , Humans , Pancreas/drug effects , Pancreas/metabolism , Pancreas/pathology , Pancreatitis, Alcoholic/diagnosis , Pancreatitis, Alcoholic/etiology
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