Browsing by Author "Gotur, Raghavender"

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    Incidence, risk factors and outcomes of de novo malignancies post liver transplantation
    (Baishideng Publishing Group Co (World Journal of Hepatology), 2016-04-28) Mukthinuthalapati, Pavan Kedar; Gotur, Raghavender; Ghabril, Marwan; Department of Medicine, IU School of Medicine
    Liver transplantation (LT) is associated with a 2 to 7 fold higher, age and gender adjusted, risk of de novo malignancy. The overall incidence of de novo malignancy post LT ranges from 2.2% to 26%, and 5 and 10 years incidence rates are estimated at 10% to 14.6% and 20% to 32%, respectively. The main risk factors for de novo malignancy include immunosuppression with impaired immunosurveillance, and a number of patient factors which include; age, latent oncogenic viral infections, tobacco and alcohol use history, and underlying liver disease. The most common cancers after LT are non-melanoma skin cancers, accounting for approximately 37% of de novo malignancies, with a noted increase in the ratio of squamous to basal cell cancers. While these types of skin cancer do not impact patient survival, post-transplant lymphoproliferative disorders and solid organ cancer, accounting for 25% and 48% of malignancies, are associated with increased mortality. Patients developing these types of cancer are diagnosed at more advanced stages, and their cancers behave more aggressively compared with the general population. Patients undergoing LT for primary sclerosing cholangitis (particularly with inflammatory bowel disease) and alcoholic liver disease have high rates of malignancies compared with patients undergoing LT for other indications. These populations are at particular risk for gastrointestinal and aerodigestive cancers respectively. Counseling smoking cessation, skin protection from sun exposure and routine clinical follow-up are the current approach in practice. There are no standardized surveillance protocol, but available data suggests that regimented surveillance strategies are needed and capable of yielding cancer diagnosis at earlier stages with better resulting survival. Evidence-based strategies are needed to guide optimal surveillance and safe minimization of immunosuppression.
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    Most Individuals With Advanced Cirrhosis Have Sleep Disturbances, Which Are Associated With Poor Quality of Life
    (Elsevier, 2017) Ghabril, Marwan; Jackson, Mollie; Gotur, Raghavender; Weber, Regina; Orman, Eric; Vuppalanchi, Raj; Chalasani, Naga; Department of Medicine, IU School of Medicine
    Background & Aims Sleep disturbances are common in patients with cirrhosis, but their determinants and effects on health-related quality of life are not well-understood. We investigated the prevalence of disturbed sleep in these patients, factors associated with sleep disruption, and effects on quality of life. Methods We performed a prospective, cross-sectional study of 193 stable ambulatory patients with cirrhosis (154 with decompensated cirrhosis). Participants completed the Pittsburgh Sleep Quality Index (to assess sleep quality), the Chronic Liver Disease Questionnaire (CLDQ), and muscle cramp questionnaires and underwent neurocognitive testing. Actigraphy was performed in a subset of patients with normal and disturbed sleep. We collected serum samples from subjects with normal and disturbed sleep and performed non-targeted metabolomic analyses. Results Of the study subjects, 157 (81%) had disturbed sleep, with Pittsburgh Sleep Quality Index scores >5. Disturbed sleep was associated with muscle cramps, daytime somnolence, and decreased quality of life on the basis of CLDQ scores. Factors independently associated with disturbed sleep in logistic regression analysis included hypoalbuminemia, opiate therapy, and muscle cramps. Disturbed sleep was independently associated with CLDQ score (correlation parameter, –36.6; 95% confidence interval, –24 to –49; P < .001) on linear regression. Disturbed sleep was associated with neurocognitive impairment and with significantly delayed bedtime and decreased total sleep time, measured by actigraphy. Disturbed sleep was associated with metabolome signatures of alterations to the intestinal microbiome and lipid, arginine, and urea cycle metabolism. Conclusions Most patients with advanced cirrhosis (81%) have disturbed sleep. This has negative effects on quality of life and is associated with disruptions of several metabolic pathways, including metabolism by the intestinal microbiota.
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    Relationship Between Characteristics of Medications and Drug-Induced Liver Disease Phenotype and Outcome
    (Elsevier B.V., 2014-09) Vuppalanchi, Raj; Gotur, Raghavender; Reddy, K. Rajender; Fontana, Robert J.; Ghabril, Marwan; Kosinski, Andrzej S.; Gu, Jiezhun; Serrano, Jose; Chalasani, Naga; Department of Medicine, IU School of Medicine
    Background & Aims: It is not known if specific characteristics of medication are associated with type of drug-induced liver injury (DILI) or outcome. We examined the relationships among select characteristics of medications and DILI phenotype and outcome. Methods: We analyzed 383 cases of DILI caused by a single orally administered prescription agent from the DILI Network Prospective Study with causalities of definite, highly likely, or probable. Relationship of daily dosage (≥ 50 mg vs. ≤ 49 mg), preponderance of hepatic metabolism (≥50% vs <50%), or Biopharmaceutics Drug Disposition Classification System (BDDCS) class (1–4, based on solubility and metabolism of the drug) were compared with clinical characteristics and outcomes. Results: Compared to cases of DILI in the <50 mg/day group, those associated with daily dosages ≥50 mg had shorter latency (median 38 days vs 56 days; P=.03) and a different biochemical pattern of liver injury (P=.04); no differences in pattern of injury, recovery, severity, or outcome were observed. Patients with DILI caused by medications with or without preponderant hepatic metabolism did not differ in clinical characteristics or outcomes. Compared to other classes of BDDCS, DILI caused by BDDCS class 1 medications had significantly longer latency (P<.001) and greater proportion of hepatocellular injury (P=.001). However, peak liver biochemical values and patients’ time to recovery, disease severity, and outcomes did not differ among the 4 BDDCS classes. Conclusions: Characteristics of medications (dosage, hepatic metabolism, and solubility) are associated with features of DILI such as latency and pattern of liver injury, but not with recovery, severity, or outcome.