Changes in cellular proliferation and plasma products are associated with liver failure

AIM To study the differences in immune response and cytokine profile between acute liver failure and selflimited acute hepatitis.METHODS Forty-six patients with self-limited acute hepatitis(AH), sixteen patients with acute liver failure(ALF), and twenty-two healthy subjects were involved in this study. The inflammatory and anti-inflammatory products in plasma samples were quantified using commercial enzyme-linked immunoassays and quantitative real-time PCR. The cellular immune responses were measured by proliferation assay using flow cytometry. The groups were divided into viral- and non-viral-induced selflimited AH and ALF. Thus, we worked with five groups: Hepatitis A virus(HAV)-induced self-limited acute hepatitis(HAV-AH), HAV-induced ALF(HAV-ALF), nonviral-induced self-limited acute hepatitis(non-viral AH), non-viral-induced acute liver failure(non-viral ALF), and healthy subjects(HC). Comparisons among HAV and non-viral-induced AH and ALF were performed.RESULTS The levels of mitochondrial DNA(mt DNA) and the cytokines investigated [interleukin(IL)-6, IL-8, IL-10, interferon gamma, and tumor necrosis factor] were significantly increased in ALF patients, independently of etiology(P < 0.05). High plasma mt DNA and IL-10 were the best markers associated with ALF [mt DNA: OR = 320.5(95%CI: 14.42-7123.33), P < 0.0001; and IL-10: OR = 18.8(95%CI: 1.38-257.94), P = 0.028] and death [mt DNA: OR = 12.1(95%CI: 2.57-57.07), P = 0.002; and IL-10: OR = 8.01(95%CI: 1.26-50.97), P = 0.027]. In the cellular proliferation assay, NK^(bright), NKT and regulatory T cells(TReg) predominated in virusspecific stimulation in HAV-induced ALF patients with an anergic behavior in the cellular response to mitotic stimulation. Therefore, in non-viral-induced ALF, anergic behavior of activated T cells was not observed after mitotic stimulation, as expected and as described by the literature. CONCLUSION mt DNA and IL-10 may be predictors of ALF and death. TReg cells are involved in immunological disturbance in HAV-induced ALF.

Gastric Volvulus Complicates the Hepatectomy for Living Donor Liver Transplantation

Donor safety is the major concern in living donor liver transplantation (LDLT), and a constant aware of postoperative morbidity should be emphasized. Between March 2002 and May 2011 we performed 435 liver transplantations at an our center, one hundred forty eight with living donors. Among them left lobectomy or left lateral resections were conducted in 68 cases. Symptoms of gastric obstruction were recognized in 3 out of 68 patients that underwent left lateral resection (4.4%). The patients were readmitted because of severe symptoms of vomiting and abdominal pain. An upper endoscopy was performed and revealed pyloroantral obstruction due to gastric volvulus (GV). Endoscopic therapy correction was successfully performed in all patients. Reviewing the literature, one article has reported GV in 13 out of 115 donors (11.3%), all patients were submitted to a left resection. The mechanisms underlying this complication, in LDLT scenario, have not been fully elucidated. Nevertheless, clinicians should be aware of this possible association, which could make the diagnosis of GV more likely if a living donor comes back with typical symptoms.