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Biomedical subjects

K Rifai

Publications and source records attributed to K Rifai.

14 recordsLinked to original sources

Repeated administration of a vitamin preparation containing glycocholic acid in patients with hepatobiliary disease.

BACKGROUND: Until now, hydrophilic and lipophilic vitamin preparations had to be administered separately during total parenteral nutrition. By addition of glycocholic acid, a vitamin supplement (Cernevit, Baxter, Heidelberg, Germany) was developed that combines all vitamins into one vial. However, little information exists about possible consequences of bile acid administration such as glycocholic acid, especially if liver disease is pre-existing. AIM: To evaluate the effects of total parenteral nutrition with a vitamin preparation containing high doses of glycocholic acid in patients with and without liver disease. METHODS: In a prospective, randomized-controlled trial, 74 patients, 36 of them with hepatobiliary disease, received total parenteral nutrition for 16 +/- 11 days, either with Cernevit or control vitamin supplements. Patients were closely monitored for clinical and biochemical parameters including serum bile acid profiles measured by high-performance liquid chromatography. RESULTS: Serum glycocholic acid increased in patients with liver disease treated with Cernevit, whereas total bile acids did not significantly change. Other liver function tests remained stable during treatment. No adverse events during Cernevit administration were noted except for a reversible slight increase of transaminases in one patient. CONCLUSIONS: Cernevit was well tolerated after repeated dosing, even in patients with severe liver disease. Apart from standard controls of liver biochemistry, no specific surveillance is necessary during treatment with Cernevit.

Adult↗

[Severe drug hepatitis caused by Chelidonium].

We report the case of a 58-year-old male patient who was admitted with severe acute cholestatic hepatitis. Liver biopsy showed signs of drug-induced hepatitis. Other causes of acute hepatitis were excluded. Therefore, the ingestion of a Chelidonium-containing preparation (celandine) was thought to be responsible for the hepatitis. Shortly after stopping the administration of Chelidonium, the highly pathological levels of several liver parameters began to normalise. As no autoantibodies were detectable, an idiosyncratic reaction as the cause of drug-induced hepatitis is probable. In cases of unknown hepatitis, herbal medications should be taken into account as a possible cause.

Chelidonium↗

[Liver dialysis].

Explore the source record for details and available documents.

Hemofiltration↗

Severe hearing loss after liver transplantation.

Little is known about hearing impairment in patients after organ transplantation. Few cases of hearing loss associated with different immunosuppressants have been published. To evaluate severe hearing impairment in patients after liver transplantation (OLT), all living adult patients in need of a hearing aid were analyzed. Out of 521 transplanted patients, 25 (5%) were identified with hearing aids. Nine (36%) of these patients either suffered from hearing loss prior to OLT or experienced risk factors such as ototoxic drugs. Of the remaining 16 patients who developed severe hearing loss after OLT (64%), half were men. Mean age was 42 +/- 18 years at OLT, which took place 8 +/- 4 years ago. Main transplantation indication was virus-induced cirrhosis (44%). In 14/16 (88%) patients, the hearing aid was bilateral. In 50% of patients, the hearing aid was necessary within 2 years post-OLT. Additional tinnitus was present in 9/16 patients (56%), otalgia in three patients (19%). Four patients (25%) reported a history of sudden deafness. In three of them, an association with high levels of calcineurin inhibitors was found. The proportion of patients receiving tacrolimus (50%) was relatively higher than those receiving cyclosporine (50%) compared to control patients (28% respectively 64%, P < .05). In conclusion, a high incidence of severe hearing loss was found in patients after liver transplantation. In most patients, onset of hearing loss is early and bilateral, suggesting a dose-dependent toxicity. The pathogenetic role of different immunosuppressants remains to be evaluated.

Adult↗

Retrospective analysis of the impact of immunosuppression on the course of recurrent hepatitis C after liver transplantation.

INTRODUCTION: In a substantial proportion of patients, recurrent hepatitis C after liver transplantation (OLT) rapidly progresses to graft cirrhosis. The role of different immunosuppressive schemes is not well evaluated. PATIENTS AND METHODS: The clinical course of 130 patients with recurrent hepatitis C after OLT was retrospectively analyzed. Mean trough levels of calcineurin inhibitors and cumulative doses of the remaining immunosuppressants were calculated. The results were compared with liver function tests, histological fibrosis progression, and survival. RESULTS: Survival and fibrosis progression were similar in patients with tacrolimus and cyclosporine and did not correlate with mean trough levels. In contrast, the application of azathioprine (mean dose of more than 25 mg/d during the first 3 months after OLT) was associated with significantly less progression of fibrosis (P = .01). Administration of azathioprine after the early postoperative phase was not related to the long-term outcome. The dose of prednisolone in the long-term course after OLT significantly correlated with the rate of fibrosis progression (P = .008). CONCLUSIONS: The clinical course of recurrent hepatitis C was variable. Survival and fibrosis progression did not correlate with the type or trough level of calcineurin inhibitors. Azathioprine early in the course after OLT and prolonged administration of prednisolone were associated with less fibrosis progression.

Female↗

[Liver transplantation for metabolic liver disease in adulthood].

The clinical presentation of metabolic liver disease is highly variable, covering acute liver failure, liver cirrhosis, hepatic cancer and various extrahepatic manifestations. Both natural course and prognosis after liver transplantation are substantially influenced by extrahepatic manifestations. In many types of metabolic liver disease, timely diagnosis allows for successful medical treatment. However, progressive liver failure and severe extrahepatic damage can be the indication for liver transplantation. In general, standard transplantation criteria also apply for metabolic liver disease. They have to be modified by disease-specific criteria, and extrahepatic damage may necessitate multiorgan transplantation. The overall prognosis after liver transplantation for metabolic liver disease is favorable. Furthermore, several metabolic defects are phenotypically cured by liver transplantation. Alternative treatments like hepatocyte transplantation or gene therapy are still in the experimental stage.

Adult↗

[Acute liver failure].

Acute liver failure is characterized by a dynamic clinical course associated with high mortality. The main prognostic determinant is the development of extrahepatic complications. Close monitoring is mandatory, and prophylactic measures to avoid complications should be initiated. In case of complications, early and aggressive treatment is indicated. To date, artificial liver support devices are still in the experimental phase. Liver transplantation should be considered in patients with predictors of a poor spontaneous prognosis. Therefore, a transplant center should be contacted in every case of acute liver failure.

Emergencies↗

[Liver replacement therapy. Reliable indications in acute liver failure].

Extracorporeal liver support devices aim at improving the therapeutical options for liver failure. Numerous artificial and bioartificial devices have been tested to reduce the high mortality of this dynamic disease. In particular, the detoxification function of the liver should be upheld, by means of a number of different procedures, either until liver function is restored or until transplantation. Both purely artificial, machine-based procedures including different forms of dialysis and hemoadsorption as well as bioartificial procedures based on hepatocytes are being tested, as are different types of extracorporeal liver perfusion. This paper provides an overview of the different methods and devices and their clinical evidence in order to give a recommendation for the handling of the expensive devices. There is no current indication for the application of liver support devices outside of clinical studies at specialised centres.

Exchange Transfusion, Whole Blood↗

A 10 year follow up study of patients transplanted for autoimmune hepatitis: histological recurrence precedes clinical and biochemical recurrence.

BACKGROUND AND AIM: Autoimmune hepatitis (AIH) has been reported to recur after orthotopic liver transplantation (OLT) in 10-35% of patients in small series with a short follow up. The aim of the present study was to examine the clinical and histological outcome more than 10 years after OLT for AIH. PATIENTS AND METHODS: Seventeen women with a mean age of 30 (12) years at the time of OLT, selected from among 44 patients transplanted for AIH, were followed for more than 10 years. The criteria for definite AIH, as established by the International Autoimmune Hepatitis Group, were met in every case. Liver biopsies were performed 1, 2, 5, and 10 years after OLT, and when indicated by abnormal liver function tests. Specimens were examined for evidence of recurrent AIH, namely interface hepatitis, lobular activity, portal lymphoplasmocytic infiltration, and fibrosis. Other signs of recurrence included hypertransaminasaemia, serum autoantibodies, and the response to steroid reintroduction or significant steroid dose increments. RESULTS: AIH recurred in 7 (41%) of 17 patients. In four patients histological abnormalities were detected by means of protocol biopsies 1-5 years before the onset of biochemical abnormalities. Two patients developed severe recurrences after 10 and 15 years, respectively, and required treatment with steroids and tacrolimus. In the other three patients histological recurrence was detected 0.6-3 years post-OLT, concomitantly with biochemical abnormalities. CONCLUSIONS: AIH recurred in 41% of patients followed for more than 10 years after OLT. As histological signs preceded biochemical abnormalities in four patients (23.5%), regular liver biopsy is warranted after OLT. Detection of isolated histological signs may call for closer follow up and/or a change in immunosuppressive therapy.

Adolescent↗

Elevated bound leptin correlates with energy expenditure in cirrhotics.

BACKGROUND & AIMS: Leptin, found to be elevated in patients with liver cirrhosis, may contribute to the inadequate energy expenditure and malnutrition associated with a negative prognosis for these patients. Our aim was to characterize leptin components and their relationships to body composition, resting energy expenditure (REE), and substrate use in patients with posthepatic liver cirrhosis. METHODS: Using specific radioimmunoassays, we measured free leptin and bound leptin in 27 cirrhotics and 27 matched control subjects. In the cirrhotic group, body composition and REE were determined. RESULTS: Free leptin was not different in cirrhotics and control subjects and was related to body mass index (controls: r = 0.34, P < 0.05; cirrhotics: r = 0.55, P < 0.005) and to fat mass (cirrhotics: r = 0.76, P < 0.0001). Bound leptin was significantly higher in cirrhotic subjects than in controls (P < 0.001) and was related to REE x fat-free mass(-1) (r = 0.57, P < 0.005) or to the difference between measured and estimated REE (r = 0.55, P < 0.005). CONCLUSIONS: Free leptin reflects fat mass in controls and cirrhotics. Increased serum leptin in cirrhotics is a result of increased bound leptin serum concentrations, which are positively related to energy expenditure. Moreover, bound leptin may be a useful marker for inadequate energy expenditure in patients with liver cirrhosis.

Adipose Tissue↗

Malabsorption with progressive weight loss and multiple intestinal ulcers in a patient with T-cell lymphoma.

We describe a 52-year-old woman who presented with severe diarrhea, nausea, intermittent abdominal pain and weight loss of 18 kg within ten months. Jejunal and duodenal ulcers were detected by endoscopy and multiple biopsies revealed villous atrophy of the jejunum. However, neither gliadin nor endomysium antibodies were detected and no clinical and histological improvement was achieved after gluten withdrawal. Despite strong clinical suspicion for intestinal lymphoma many unrevealing biopsies were done. The patient developed intermittent septic fever and diagnostic laparotomy revealed jejunal perforation. Partial jejunal resection was performed and histology confirmed the diagnosis of an intestinal T-cell lymphoma without celiac disease. Malabsorption and all intestinal ulcers disappeared during the course of chemotherapy (six cycles CHOP) and the patient recovered remarkably.

Biopsy↗

A perfusion technique for the determination of pro-inflammatory mediators induced by intradental application of irritants.

INTRODUCTION: Several morphological and functional features contribute to the consideration of the tooth as a separate compartment having special type of innervation and special immune mechanisms. This study describes a new method allowing the intradental perfusion of rat incisors for the in vivo assessment of pulpal reaction to inflammatory agents. METHODS: Under deep anesthesia, the distal 2-3 mm of each of the rat lower incisors was cut and wrapped in a polyethylene tubing connected to a perfusion chamber made of tigone tubing (ID 1/8 in., volume 100-150 microl). Several groups of rats (n=5 each) were used for intradental application of either saline, capsaicin (100 microg in 100 microl), or endotoxin (ET, 20 microg in 100 microl) for a period of 40 min followed by filling the tooth chamber with saline and collecting the perfusate every 40 min for a period of 8 h. The collected perfusates were stored at -70 degrees C for subsequent determination of the concentration of prostaglandin E(2) (PGE(2)) and nerve growth factor (NGF) by enzyme-linked immunosorbent assay (ELISA). RESULTS: Dentinal injury produced a moderate increase in the levels of NGF and PGE(2) in incisors perfused with saline. Application of ET or capsaicin, however, produced a highly significant increase in the levels of both mediators. These effects peaked at 1.5-3 h for PGE(2) and at 5 h for NGF. Capsaicin showed the most significant effects. DISCUSSION: The reported results cannot be attributed to any factor other than the inflammation of the incisor's pulp, because the described chamber does not allow any spread or leak of the applied irritants. Further studies using other reagents can allow the determination of the variation of the levels of the various pro-inflammatory mediators and their modulation by treatment with anti-inflammatory drugs.

Animals↗