Given a passage with a context and an answer, construct a question on the basis of the information present in the passage. Construct the question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) it answer uses text phrases from the passage. Avoid creating questions that (i) can't be answered correctly without actually understanding the passage and (ii) uses the same words or phrases given in the passage.

[EX Q]: Context: Oxidative stress has been considered to play a primary role in the pathogenesis of stress-induced gastric damage. The aim of this study was to investigate the effects of melatonin, ascorbic acid and -carotene on stress-induced gastric mucosal damage.', 'Fifty-six male Wistar albino rats were divided into control, stress, stress + standard diet, stress + saline, stress + melatonin, stress + ascorbic acid and stress + -carotene groups. The rats from stress groups were exposed to starvation, immobilization and cold by immobilizing for 8 h at +4C following 72-hour food restriction. Following stress application, melatonin, ascorbic acid and -carotene were administered for 7 days. Specimens of gastric tissue were prepared for microscopic and biochemical examinations.', 'Mean histopathological damage scores and mean tissue malondialdehyde levels were significantly decreased but mean tissue glutathione levels and glutathione peroxidase and superoxide dismutase activities were increased in treatment groups vs. stress groups in general. Mean histopathological damage scores of the stress + Mel group was lower than those of stress + D, stress + S, stress + -car (p < 0.05) and stress + Asc groups (p < 0.005). Additionally, mean tissue catalase activity of the stress + Mel group was higher than that of stress + S (p < 0.005), stress + D (p < 0.05) and stress + -car groups (p < 0.05).
Answer: Melatonin is more effective than ascorbic acid and -carotene in improvement of gastric damage induced by intensive stress. We suggest that as well as the direct antioxidant and free radical scavenging potency of melatonin, its indirect effect via the brain-gut axis might account for its greater beneficial action against stress-induced gastric damage.
[EX A]: Is melatonin more effective than ascorbic acid and -carotene in improvement of gastric mucosal damage induced by intensive stress?

[EX Q]: Context: Breast reconstruction (BR) following mastectomy for breast cancer has been shown to improve quality of life and body image; however, there is significant geographic variation in BR rates. We explored factors associated with BR following mastectomy.', 'This is a population-based data linkage study consisting of cancer registry records linked to hospital inpatient episodes for 4104 women aged 20years and over-diagnosed with a first primary invasive localized stage breast cancer between 1997 and 2012 in Queensland, Australia, who underwent a mastectomy. Multivariate logistic regression was used to model predictors of BR.', 'Overall, 481 women (11.7%) underwent reconstruction. Proportions increased over time and were higher for younger women. Younger age, more recent diagnosis, living in high or very high accessibility areas or less disadvantaged areas, smaller tumours and attending a private or high-volume hospital independently increased the odds of reconstruction. The geographical disparity reduced significantly over time.
Answer: Geographical barriers to accessing BR have reduced; however, continued monitoring and further research to inform strategies to further reduce subgroup disparities remain a priority.
[EX A]: Does geographical disparity in breast reconstruction following mastectomy have reduced over time?

[EX Q]: Context: Aging and obesity are associated with elevated pro-inflammatory cytokines such as monocyte chemoattractant protein (MCP)-1 and tumor necrosis factor (TNF), which are linked to insulin resistance. Anti-inflammatory agents have marginal effect in improving insulin resistance. Hence, agents are needed to improve glycemic control despite the inflammation. Ad36, a human adenovirus, increases TNF and MCP1 mRNA in adipose tissue, yet improves glycemic control in mice. Ad36 via its E4orf1 gene, up-regulates AKT/glucose transporter (Glut)-4 signaling to enhance cellular glucose uptake.', 'Directly test a role of Ad36, or E4orf1 in enhancing cellular glucose uptake in presence of inflammatory cytokines.', 'Experiment 1: 3T3-L1 preadipocytes were treated with 0, 10 or 100ng/mL lipopolysaccharides (LPS), and infected with 0 or 5 plaque forming units (PFU) of Ad36/cell. 3T3-L1 cells that stably and inducibly express E4orf1 or a null vector (pTRE-E4orf1 or pTRE-null cells), were similarly treated with LPS and then with doxycycline, to induce E4orf1. Experiment 2: 3T3L1 preadipocytes were treated with 25nM MCP1 or 20nM TNF for 16h, followed by infection with 0 or 5PFU of Ad36/cell. Experiment 3: pTRE-E4orf1 or -null cells were similarly treated with MCP1 or TNF followed by doxycycline to induce E4orf1. Cellular glucose uptake and cellular signaling were determined 72h post-Ad36 infection or E4orf1-induction, in continued presence of MCP1 or TNF.', 'In 3T3-L1 preadipocytes, Ad36, but not E4orf1, increased MCP1 and TNF mRNA, in presence of LPS stimulation. Ad36 or E4orf1 up-regulated AKT-phosphorylation and Glut4 and increased glucose uptake (P<0.05) in the presence of MCP1 or TNF.
Answer: Unlike Ad36, E4orf1 does not appear to stimulate inflammatory response. Ad36 and E4orf1 both enhance cellular glucose uptake even in presence of inflammation. Further research is needed to harness this novel and beneficial property of E4orf1 to improve hyperglycemia despite chronic inflammation that is commonly present in aging and obesity.
[EX A]:
Do human adenovirus Ad36 and its E4orf1 gene enhance cellular glucose uptake even in the presence of inflammatory cytokines?