TASK DEFINITION: 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.
PROBLEM: Context: We examined the effect of prior heating, by exercise and warm-water immersion, on core cooling rates in individuals rendered mildly hypothermic by immersion in cold water.', 'There were seven male subjects who were randomly assigned to one of three groups: 1) seated rest for 15 min (control); 2) cycling ergometry for 15 min at 70% Vo2 peak (active warming); or 3) immersion in a circulated bath at 40 degrees C to an esophageal temperature (Tes) similar to that at the end of exercise (passive warming). Subjects were then immersed in 7 degrees C water to a Tes of 34.5 degrees C.', 'Initial Tes cooling rates (initial approximately 6 min cooling) differed significantly among the treatment conditions (0.074 +/- 0.045, 0.129 +/- 0.076, and 0.348 +/- 0.117 degrees C x min(-1) for control, active, and passive warming conditions, respectively); however, secondary cooling rates (rates following initial approximately 6 min cooling to the end of immersion) were not different between treatments (average of 0.102 +/- 0.085 degrees C x min(-1)). Overall Tes cooling rates during the full immersion period differed significantly and were 0.067 +/- 0.047, 0.085 +/- 0.045, and 0.209 +/- 0.131 degrees C x min(-1) for control, active, and passive warming, respectively.
Answer: These results suggest that prior warming by both active and, to a greater extent, passive warming, may predispose a person to greater heat loss and to experience a larger decline in core temperature when subsequently exposed to cold water. Thus, functional time and possibly survival time could be reduced when cold water immersion is preceded by whole-body passive warming, and to a lesser degree by active warming.

SOLUTION: Does warming by immersion or exercise affect initial cooling rate during subsequent cold water immersion?

PROBLEM: Context: Magnetic fields have been shown to affect cell proliferation and growth factor expression in cultured cells. Although the activation of endorphin systems is a recurring motif among the biological events elicited by magnetic fields, compelling evidence indicating that magnetic fields may modulate opioid gene expression is still lacking. We therefore investigated whether extremely low frequency (ELF) pulsed magnetic fields (PMF) may affect opioid peptide gene expression and the signaling pathways controlling opioid peptide gene transcription in the adult ventricular myocyte, a cell type behaving both as a target and as a source for opioid peptides.', 'Prodynorphin gene expression was investigated in adult rat myocytes exposed to PMF by the aid of RNase protection and nuclear run-off transcription assays. In PMF-exposed nuclei, nuclear protein kinase C (PKC) activity was followed by measuring the phosphorylation rate of the acrylodan-labeled MARCKS peptide. The effect of PMF on the subcellular distribution of different PKC isozymes was assessed by immunoblotting. A radioimmunoassay procedure coupled to reversed-phase high performance liquid chromatography was used to monitor the expression of dynorphin B.', 'Here, we show that PMF enhanced myocardial opioid gene expression and that a direct exposure of isolated myocyte nuclei to PMF markedly enhanced prodynorphin gene transcription, as in the intact cell. The PMF action was mediated by nuclear PKC activation but occurred independently from changes in PKC isozyme expression and enzyme translocation. PMF also led to a marked increase in the synthesis and secretion of dynorphin B.
Answer: The present findings demonstrate that an opioid gene is activated by myocyte exposure to PMF and that the cell nucleus and nuclear embedded PKC are a crucial target for the PMF action. Due to the wide ranging importance of opioid peptides in myocardial cell homeostasis, the current data may suggest consideration for potential biological effects of PMF in the cardiovascular system.

SOLUTION: Do elf-pulsed magnetic fields modulate opioid peptide gene expression in myocardial cells?

PROBLEM: Context: CYR61 is an extracellular matrix-associated protein that promotes adhesion, migration, and proliferation of endothelial cells and fibroblasts. Prostate enlargement, which frequently causes the urethral compression, is often histologically observed as stromal and epithelial hyperplasia in an enlarged gland. To determine whether or not CYR61 has relevance to the progression of benign prostatic hyperplasia (BPH), we investigated the induction of CYR61, and also examined its function in both prostatic stromal and epithelial cells.', 'Recombinant CYR61 protein was used for the examination of the activity of CYR61 as to cell adhesion and proliferation. Quantitative reverse transcription-polymerase chain reaction (RT-PCR) was utilized to screen for inducers of the CYR61 gene in prostatic cells. Finally, the effects of an anti-sense oligonucleotide, which could reduce the production of CYR61, on the morphology and growth of prostatic cells were also examined.', 'Recombinant CYR61 protein promotes prostatic cell adhesion and proliferation. The mRNA for CYR61, a growth factor-inducible immediate early gene, was markedly induced by fetal bovine serum (FBS) within 1 hr, and strongly induced by transforming growth factor-beta1 (TGF-beta) for at least 19 hr following stimulation. The suppression of CYR61 production with an anti-sense oligonucleotide causes obvious morphological changes of prostatic cells. Furthermore, we have shown that CYR61 is necessary, at least in part, for FBS-induced prostatic cell proliferation, because dramatic inhibition of cellular growth was caused by the suppression of CYR61 production with the addition of the anti-sense oligonucleotide before FBS stimulation.
Answer: In this study, we demonstrate that serum growth factors induce the CYR61 gene in both stromal and epithelial cells, and that CYR61 plays functional roles in cell adhesion, morphology, and proliferation, supporting its involvement in benign prostatic enlargement. These results strongly suggest that CYR61 is a key molecule, and therefore could be a potential therapeutic target in prostatic hyperplastic growth.

SOLUTION:
Is induction and function of CYR61 ( CCN1 ) in prostatic stromal and epithelial cells : CYR61 required for prostatic cell proliferation?