Given a passage, 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.

Lipopolysaccharide (LPS)-induced preconditioning protects neurons against traumatic spinal cord injury (TSCI) in rats. This study sought to test whether Nrf2, a transcription factor, mediated LPS-induced preconditioning.', 'The TSCI model was established using a standardized NYU impactor on adult female rats. Rats were pretreated with LPS (0.2mg/kg, IP; 72h before injury). Nrf2 was silenced by injecting a lentivirus encoding RNAi against Nrf2 into injured spinal cords. Neurologic function was assessed by Basso, Beattie and Bresnahan (BBB) scores 6h, 12h, 24h, 48h, 72h, 7d and 14d after TSCI. Neuronal apoptosis was measured by a TUNEL staining. Ultrastructure was observed using transmission electron microscope (TEM). The protein expression of HO-1, NQO1 and GCLC was examined using immunohistochemistry and immunoblotting.', 'The injection of a lentivirus effectively transfected GFP into injured spinal cords. The expression of Nrf2 was significantly decreased in spinal cords receiving a lentivirus encoding RNAi against Nrf2. BBB scores showed that TSCI markedly impaired nervous function, which was markedly preserved by LPS pretreatment. Nrf2 knockdown significantly suppressed LPS pretreatment-induced protection of nervous function. TEM images and TUNEL staining showed an increase in apoptotic cells when Nrf2 was silenced. Moreover, immunohistochemistry and immunoblotting analysis exhibited that LPS pretreatment significantly upregulated the expression of anti-oxidative proteins including HO-1, NQO1 and GCLC, which was suppressed when Nrf2 expression was silenced in injured spinal cords.
Does lipopolysaccharide-induced preconditioning protect against traumatic spinal cord injury by upregulating Nrf2 expression in rats?

The aim of this study was to determine the reasons for which erupted third molars (3M) are extracted in a sample of Mexican patients.', "A retrospective cross-sectional study was performed on a sample of 83 patients attending exodontia (minor oral surgery) clinics of a public university in Mexico (Autonomous University of Hidalgo State). The outcome variable was the reason for extractions using Kay and Blinkhorn's classification. The independent variables were age, gender, arch and tooth number according to the World Health Organization (WHO). For statistical analysis, we used the Chi-squared test in Stata 9.0.", 'Eighty-three patients underwent 150 3M extractions. Mean age was 38.67 13.96 years, and 71.1% were female. The four reasons for 3M extraction were prosthetic (44.0%), followed by orthodontic (24.7%), dental caries (20.0%) and periodontal disease (11.3%). Differences were observed in the reasons for 3M extractions across age groups (p < 0.05). No significant differences existed between men and women (p > 0.05), or the WHO tooth number (p > 0.05).
Are reasons why erupted third molars extracted in a public university in Mexico?

The objective of this study was to study how changing the ratio of Lys to Thr, Lys to His, and Lys to Val affects the expression of lipogenic genes and microRNA (miRNA) in bovine mammary epithelial cells.', 'Triplicate cultures with the respective "optimal" amino acid (AA) ratio (OPAA=Lys:Met 2.9:1; Thr:Phe 1.05:1; Lys:Thr 1.8:1; Lys:His 2.38:1; Lys:Val 1.23:1) plus rapamycin (OPAARMC; positive control), OPAA, Lys:Thr 2.1:1 (LT2.1), Lys:Thr 1.3:1 (LT1.3), Lys:His 3.05:1 (LH3.0), or Lys:Val 1.62:1 (LV1.6) were incubated in lactogenic medium for 12h. The expression of 15 lipogenic genes and 7 miRNA were evaluated. Responses to LT2.1, LT1.3, LH3.0, and LV1.6 relative to the control (OPAARMC) included up-regulated expression of ACSS2, FABP3, ACACA, FASN, SCD, LPIN1, INSIG1, SREBF1, PPARD, and NR1H3 (commonly known as LXR-). Furthermore, LV1.6 up-regulated expression of ACSL1, DGAT1, and RXRA and down-regulated PPARG expression. Although no effect of OPAA on expression of PPARG was observed, compared with the control, OPAA up-regulated expression of the PPAR targets ACSS2, FABP3, ACACA, FASN, SCD, LPIN1, INSIG1, and SREBF1. Compared with the control, the expression of the anti-lipogenic MIR27AB was down-regulated by OPAA, LT2.1, LT1.3 and LH3.0. In contrast, compared with the control, the expression of the pro-lipogenic MIR21 was up-regulated by LT2.1, LT1.3, LH3.0, and LV1.6.
Do essential amino acid ratios and mTOR affect lipogenic gene networks and miRNA expression in bovine mammary epithelial cells?