TASK DEFINITION: In this task, you are given a passage which has a question and the context. You have to generate an answer to the question based on the information present in the context.
PROBLEM: Context: Cervical cancer continues to threaten women's health worldwide, and the incidence of cervical adenocarcinoma (AD) is rising in the developed countries. Previously, we showed that glucose-regulated protein 58 (Grp58) served as an independent factor predictive of poor prognosis of patients with cervical AD. However, the molecular mechanism underlying the involvement of Grp58 in cervical carcinogenesis is currently unknown.", 'DNA microarray and enrichment analysis were used to identify the pathways disrupted by knockdown of Grp58 expression.', 'Among the pathway identified, the WNT signaling pathway was one of those that were significantly associated with knockdown of Grp58 expression in HeLa cells. Our experiments showed that -catenin, a critical effector of WNT signaling, was stabilized thereby accumulated in stable Grp58 knockdown cells. Membrane localization of -catenin was observed in Grp58 knockdown, but not control cells. Using a transwell assay, we found that accumulated -catenin induced by Grp58 knockdown or lithium chloride treatment inhibited the migration ability of HeLa cells. Furthermore, an inverse expression pattern of Grp58 and -catenin was observed in cervical tissues.\Question: Does glucose-regulated protein 58 modulate -catenin protein stability in a cervical adenocarcinoma cell line?

SOLUTION: Our results demonstrate that -catenin stability is negatively regulated by Grp58 in HeLa cells. Overexpression of Grp58 may be responsible for the loss of or decrease in membranous -catenin expression in cervical AD.

PROBLEM: Context: Two recent genome-wide association studies identified the liver expressed transmembrane protein adiponutrin to be associated with liver related phenotypes such as non-alcoholic fatty liver disease and liver function enzymes. These associations were not uniformly reported for various ethnicities. The aim of this study was to investigate a common non-synonymous variant within adiponutrin (rs738409, exon 3) with parameters of liver function in three independent West Eurasian study populations including a total of 4290 participants.', 'The study was performed in (1) the population based Bruneck Study (n=783), (2) the Salzburg Atherosclerosis Prevention Program in Subjects at High Individual Risk Study from Austria based on a healthy working population (n=1705), and the Utah Obesity Case-Control Study including a group of 1019 severely obese individuals (average body mass index 46.0 kg/m(2)) and 783 controls from the same geographical region of Utah. Liver enzymes measured were alanine aminotransferase (ALT), aspartate aminotransferase (AST) and gamma-glutamyl transferase (GGT).', 'A strong recessive association of this polymorphism was found with age and gender adjusted ALT and AST concentrations: being homozygous for the minor allele resulted in a highly significant increase of ALT concentration of 3.53 U/l (p=1.86 x 10(-9)) and of AST concentration of 2.07 U/l (p=9.58 x 10(-6)), respectively. The associations were consistently found in all three study populations.\Question: Does a common variant in the adiponutrin gene influence liver enzyme values?

SOLUTION: The highly significant associations of this transversion polymorphism within the adiponutrin gene with increased ALT and AST concentrations support a role for adiponutrin as a susceptibility gene for hepatic dysfunction.

PROBLEM: Context: Fusobacterium nucleatum, a commensal opportunistic oral bacterium, is capable of invading gingival epithelial cells, but the entrance into human primary oral fibroblast cells has not been documented. This study evaluated the ability of three strains of F. nucleatum (F. nucleatum ssp. nucleatum, F. nucleatum ssp. polymorphum, and F. nucleatum ssp. vincentii) to enter gingival fibroblasts (GFs) and periodontal ligament fibroblasts (PLFs).', 'GFs and PLFs were cocultured for various periods of time with different strains of F. nucleatum. Scanning and transmission electron microscopy, together with confocal laser scanning microscopy, were used to visualize the entrance and presence of bacteria in host cells. Flow cytometry was performed to compare the load of internalized bacteria in GFs and PLFs exposed for 3 and 5 hours to live F. nucleatum labeled with fluorescein isothiocyanate.', 'All three strains of F. nucleatum were found entering and located in the cytoplasm of GFs and PLFs after 1 hour of exposure. Flow cytometry tests revealed a significant increase in the fluorescent signal, compared to baseline, derived from bacteria internalized in fibroblasts exposed for 3 hours (P <0.001); a further increase was found at 5 hours. The greatest bacterial mass in exposed fibroblasts of both types was of F. nucleatum ssp. polymorphum; the smallest was of F. nucleatum ssp. vincentii. Although not statistically significant, PLFs had a higher bacterial load than corresponding GFs.\Question: Does fusobacterium nucleatum enter normal human oral fibroblasts in vitro?

SOLUTION:
F. nucleatum was capable of entering GFs and PLFs in a manner that is dependent on the cell type and the bacterial strain.