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Legan SJ, Peng X, Yun C, Duncan MJ. Effect of arousing stimuli on circulating corticosterone and the circadian rhythms of luteinizing hormone (LH) surges and locomotor activity in estradiol-treated ovariectomized (ovx+EB) Syrian hamsters. Horm Behav 2015; 72:28-38. [PMID: 25958077 PMCID: PMC4466083 DOI: 10.1016/j.yhbeh.2015.04.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 04/28/2015] [Accepted: 04/29/2015] [Indexed: 12/21/2022]
Abstract
In most proestrous hamsters, novel wheel exposure phase advances activity rhythms and blocks the preovulatory LH surge, which occurs 2h earlier the next day. Because wheel immobilization does not prevent these effects we hypothesized that arousal alone blocks and phase advances the LH surge. Ovariectomized (ovx) hamsters received a jugular vein cannula and estradiol benzoate (EB) or vehicle was injected sc. The next day (Day 1), at zeitgeber time (ZT) 4-5 (ZT 12 = lights off), after obtaining a blood sample, each hamster was exposed to constant darkness (DD), and either remained in her home cage or was transferred to a new cage and exposed to a running wheel or a 2-hour arousal paradigm. Blood samples were obtained in dim red light and activity was recorded hourly until ~ZT 10-11 on Days 1 and 2. For the next 1-2 weeks, activity was monitored in DD. Plasma LH and corticosterone were assessed by RIA. Novel wheel exposure or arousal at ZT 4 greatly attenuated the Day 1 LH surge in ovx+EB hamsters, and phase advanced the Day 2 LH surge by about 2h. In proestrous hamsters, novel wheel exposure led to a prolonged (>2h) increase in corticosterone levels only when LH surges were blocked. Phase advances in activity rhythms were enhanced by estradiol and arousal. The results suggest that estradiol modulates the effectiveness of non-photic stimuli. The role of the increased activity of the hypothalamic-pituitary-adrenal axis associated with novel wheel-induced attenuation of LH surges in ovx+EB hamsters remains to be determined.
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Peng DF, Tang SY, Hu YJ, Chen J, Peng X, Huang Q. Comparison of valsartan and benazepril when combined with atorvastatin in protecting patients with early cardio-renal syndrome (CRS). EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2015; 19:1264-1271. [PMID: 25912588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE The aims to investigate the different protective effects of valsartan and benazepril when combined with atorvastatin in the cardio-renal functions of cardio-renal syndrome (CRS) patients. PATIENTS AND METHODS A total of 200 early CRS patients were enrolled in the present study, including 104 males and 96 females, with an average age of 62.2 ± 7.7 years. The same group of patients were set as the control group prior to treatment, and then randomly divided into two groups; the A group was treated with valsartan (80 mg/d) and atorvastatin (20 mg/d); the B group was treated with benazepril (10 mg/d) and atorvastatin (20 mg/d). The treatment period was 24 months. RESULTS The clinical efficacy and clinical events were observed and the following parameters of each patient were measured before and after treatment: 24h urine protein; creatinine clearance; serum brain natriuretic peptide (BNP); high sensitivity C-reactive protein (hsCRP); blood lipid level; liver function and ejection fraction (EF) value. Compared with the control group, the clinical symptoms of the treatment groups were improved with decreased blood lipid levels, significantly decreased serum BNP and hsCRP levels and significantly increased EF values and creatinine clearance rates (p < 0.01). The differences between the two treatment groups were not statistically significant. The number of patients that stopped treatment due to the development of a cough was significantly higher in the B group than the A group (p < 0.01). CONCLUSIONS When combined with atorvastatin, both valsartan and benazepril effectively improved the cardio-renal functions of early CRS patients. There was no significant difference between the two treatments however, valsartan appeared to be better tolerated by patients.
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Wu L, Lu J, Kwee S, Li M, Peng X, Xie L, Lin Z, Kuang Y. EP-1518: 18F-NaF PET/CT-guided boost stereotactic body radiation therapy for bone metastases from prostate cancer. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)41510-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Zhang WB, Wang Y, Liu XJ, Mao C, Guo CB, Yu GY, Peng X. Reconstruction of maxillary defects with free fibula flap assisted by computer techniques. J Craniomaxillofac Surg 2015; 43:630-6. [PMID: 25887427 DOI: 10.1016/j.jcms.2015.03.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 03/04/2015] [Accepted: 03/05/2015] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE Free fibula flaps are widely used for maxillary reconstruction. The three-dimensional position of the fibula flap is very difficult to control in conventional operations based solely on the surgeon's experience. We aimed to improve this surgery by using computerized techniques. METHODS Twenty-seven patients with maxillary tumors underwent maxillectomy and free fibula flap reconstruction in our department between 2011 and 2013. Virtual planning and surgical navigation were used for eight patients, and conventional surgery was performed in 19 patients. The three-dimensional fibular positions were evaluated in the two groups. Differences between the postoperative position of the fibular segments and the virtual plans were evaluated in the computer-assisted surgery group. RESULTS The three-dimensional position of the fibula flap in the computer-assisted surgery group, including the vertical distance (p = 0.013), horizontal position (p = 0.019) and extension of the posterior end (p = 0.041), was significantly more accurate and nearer to the ideal position than that in the conventional surgery group. The average difference between the actual postoperative position of the fibular segments and the virtual plan in the computer-assisted surgery group was <5 mm. CONCLUSION Application of computer-assisted techniques such as virtual planning and surgical navigation significantly improve the clinical outcomes of maxillary reconstruction with free fibula flaps.
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Zhang W, Wang Y, Mao C, Guo C, Yu G, Peng X. Cervical metastasis of maxillary squamous cell carcinoma. Int J Oral Maxillofac Surg 2015; 44:285-91. [DOI: 10.1016/j.ijom.2014.10.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/16/2014] [Accepted: 10/23/2014] [Indexed: 10/24/2022]
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Liu F, Peng X, Liang P, Luo J. [Effectiveness and safety of low-dose vecuronium on globe position of pediatric patients in ocular surgery]. ZHONGHUA YI XUE ZA ZHI 2015; 95:286-288. [PMID: 25877246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To test the effectiveness and safety of low-dose vecuronium (0.01 mg/kg) for correcting eccentric eye position during ocular surgery. METHODS A total of 80 ASA I-II children undergoing cataract or squint surgery were randomized into 2 groups (n = 40 each). Fentanyl and propofol were used for induction and then laryngeal mask (LMA) was inserted. 0.01 mg/kg vecuronium was administered to the low-dose group (L group) and 0.08 mg/kg vecuronium for high-dose group (H group). The ToF-Watch was fixed to monitor the train of four ratio (TOFR) of adductor pollicis. Eyeball eccentricity ratio before and after dosing, TOFR, duration of eyeball in central position, duration of surgery, the time from the end of surgery to removal of LMA and oculist satisfaction were recorded. RESULTS The incidence of eccentric eyeball position was nearly 100% in both groups. The eyeball eccentricity ratio was 0.30 ± 0.11 in L group and 0.29 ± 0.12 in H group (P = 0.852) after/before vecuronium injection. The eyeballs were fixed well in the central position in both groups after vecuronium injection. The duration was shorter in L group than that in H group (23.43 ± 2.45 vs 37.63 ± 7.75 min, P < 0.001) . The time from the end of surgery to removal of LMA was (8.57 ± 3.49) min in L group and (12.28 ± 4.26) min in H group (P = 0.014). TOFR had merely mild reduction in L group and returned to normal in 10 minutes. At the end of surgery, TOFR was 102.43% ± 4.70% in L group and 80.47 ± 5.53 in H group (P < 0.001). Oculists were satisfied with eyeball position in both groups (P = 0.958). CONCLUSION Low-dose vecuronium can correct eccentric eyeball position effectively and safely during ocular surgery while it has little effect on respiratory muscles.
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Ramachandran K, Peng X, Bokvist K, Stehno-Bittel L. Assessment of re-aggregated human pancreatic islets for secondary drug screening. Br J Pharmacol 2015; 171:3010-22. [PMID: 24641508 DOI: 10.1111/bph.12622] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 01/10/2014] [Accepted: 01/29/2014] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Insulin secretion from isolated pancreatic islets is a pivotal assay in developing novel insulin secretagogues, given its good correlation with in vivo efficacy. Because the supply of human islets is limited, this assay is typically run with rodent islets, which do not address species differences and are low-throughput, because of the size matching or volume normalization required. Here we have evaluated the suitability of human re-aggregated islets for this assay. EXPERIMENTAL APPROACH We generated re-aggregated human islets of a consistent size, using micromolds and compared their responses with those of native human and rat islets, to known secretagogues and inhibitors of insulin release. KEY RESULTS Insulin secretion from rat islets, human islets and human re-aggregated cell clusters was concentration-dependently increased by glucose. The calcium channel agonist, Bay K 8644, stimulated insulin secretion in native rat islets and human re-aggregated islets, but not native human islets. Glibenclamide and tolbutamide were more effective and potent in re-aggregated human clusters compared with the other two preparations. Rat islets outperformed both human preparations of islets in response to caffeine, carbachol and glucagon-like peptide-1. Re-aggregated human islet clusters were more sensitive to somatostatin, diazoxide and sodium azide, but rodent islets were more sensitive to nifedipine. CONCLUSIONS AND IMPLICATIONS Human re-aggregated clusters of islet cells, of a constant size were more responsive to all compounds tested than native human islets. Importantly, the assay variability was less in the re-aggregated cluster preparations, which suggests that such re-aggregated cells could be useful for drug development.
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Ji X, Song YT, Shen G, Zhou Z, Cao L, Xu T, Liu X, Peng X, Wang C, Wang S, Zhu N, Zhang P, Wu J, Gong X, Shen B, Gao D, Fu P, Wan B, Li J. Engineering Design of EAST Passive Stabilization Loop. JOURNAL OF FUSION ENERGY 2014. [DOI: 10.1007/s10894-014-9827-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ren ZH, Yuan W, Deng HD, Deng JL, Dan QX, Jin HT, Tian CL, Peng X, Liang Z, Gao S, Xu SH, Li G, Hu Y. Effects of antibacterial peptide on cellular immunity in weaned piglets. J Anim Sci 2014; 93:127-34. [PMID: 25403191 DOI: 10.2527/jas.2014-7933] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to evaluate the effects of antibacterial peptide (ABP) sufficiency on cellular immune functions by determining the spleen cell cycle and apoptosis, peripheral blood T cell subsets, and T cell proliferation function in weaned piglets. A total of 90 piglets (Duroc × Landrace × Yorkshire) of both sexes were randomly allotted to 5 dietary treatments. Each treatment consisted of 3 replicates with 6 piglets per replicate. The dietary treatments consisted of the negative control (NC; basal diet), positive control (PC; basal diet supplemented with 400 mg/kg Astragalus polysaccharide), and ABP (basal diet mixed with 250, 500, and 1,000 mg/kg ABP). The experimental lasted for 28 d. Two piglets from each replicate were selected randomly for blood samples extraction from the jugular vein to obtain peripheral blood T cell subsets, and T cell proliferation function analysis was performed on d 32, 39, 46, and 53. Two piglets from each replicate were selected and euthanized to observe the spleen cell cycle and apoptosis on d 39 and 53. In ABP-sufficient piglets, the G0/G1 phase of the spleen cell cycle was much lower (P < 0.05) and the S and G2 + M phases and proliferation index (PI) were greater (P < 0.05) than in NC piglets. The percentage of apoptotic cells in the spleen significantly decreased under ABP sufficiency (P < 0.05). The proliferation function of peripheral blood T cells increased (P < 0.05) in ABP-sufficient piglets. Percentages of CD3 (+) and CD3 (+)CD4 (+) ratios (d 39, 46, and 53) and CD4 (+)CD8 (+) ratios (d 32, 39, 46, and 53) increased remarkably (P < 0.05) under ABP sufficiency compared with NC. These results suggest that ABP sufficiency could increase the T cell population and proliferation function of T cells and could induce decreased percentages of apoptotic cells. Overall, the cellular immune function was evidently improved in weaned piglets. We suggest optimal dosages of 500 mg/kg ABP for 4-wk addition and 1,000 mg/kg ABP for 2-wk addition.
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Liu L, Xiao Z, Xiao Y, Wang Z, Li F, Li M, Peng X. Combination of high-intensity focused ultrasound irradiation and hydroxyapatite nanoparticle injection to injure normal goat liver tissue in vivo without costal bone incision. GENETICS AND MOLECULAR RESEARCH 2014; 13:8301-8. [PMID: 25366724 DOI: 10.4238/2014.october.20.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aims of this study were to evaluate the in vivo safety of intravenous nano-hydroxyapatite (nano-HA), to explore how nano-HA might influence the effects of high-intensity focused ultrasound (HIFU) on normal liver tissue, and to investigate whether intravenous nano-HA could enhance HIFU for hepatocellular carcinoma ablation in a goat model. The present study, for the first time, indicated that the delivery of abundant nano-HA into the body over short periods of time could be assembled by the hepatic reticuloendothelial system, subsequently leading to a rapid rise of ultrasound-induced overheating, and ultimately resulting in enlargement of the coagulation necrotic area for ablated hepatocellular carcinoma in goats both in vivo and ex vivo. On the other hand, therapeutic doses of nano-HA were much lower than the lethal dose, and consequently presented transient and mild abnormalities of hepatic enzymes and renal function during the first 24 h after nano-HA injection. These results suggested that the combined application of nano-HA and HIFU is potentially a more effective alternative option compared to surgery for hepatocellular carcinoma local ablation in a safe and feasible manner.
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Feng Z, Gao Y, Niu L, Peng X, Guo C. Selective versus comprehensive neck dissection in the treatment of patients with a pathologically node-positive neck with or without microscopic extracapsular spread in oral squamous cell carcinoma. Int J Oral Maxillofac Surg 2014; 43:1182-8. [DOI: 10.1016/j.ijom.2014.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 05/01/2014] [Accepted: 05/15/2014] [Indexed: 11/28/2022]
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Peng X, Gong F, Chen Y, Jiang Y, Liu J, Yu M, Zhang S, Wang M, Xiao G, Liao H. Autophagy promotes paclitaxel resistance of cervical cancer cells: involvement of Warburg effect activated hypoxia-induced factor 1-α-mediated signaling. Cell Death Dis 2014; 5:e1367. [PMID: 25118927 PMCID: PMC4454295 DOI: 10.1038/cddis.2014.297] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 05/06/2014] [Accepted: 05/27/2014] [Indexed: 02/05/2023]
Abstract
Paclitaxel is one of the most effective chemotherapy drugs for advanced cervical cancer. However, acquired resistance of paclitaxel represents a major barrier to successful anticancer treatment. In this study, paclitaxel-resistant HeLa sublines (HeLa-R cell lines) were established by continuous exposure and increased autophagy level was observed in HeLa-R cells. 3-Methyladenine or ATG7 siRNA, autophagy inhibitors, could restore sensitivity of HeLa-R cells to paclitaxel compared with parental HeLa cells. To determine the underlying molecular mechanism, differentially expressed proteins between HeLa and HeLa-R cells were identified by two-dimensional gel electrophoresis coupled with electrospray ionization quadrupole time-of-flight MS/MS. We found glycolysis-associated proteins were upregulated in HeLa-R cell lines. Inhibition of glycolysis by 2-deoxy-D-glucose or koningic acid could decrease autophagy and enhance sensitivity of HeLa-R cells to paclitaxel. Moreover, glycolysis could activate HIF1-α. Downregulation of HIF1-α by specific siRNA could decrease autophagy and resensitize HeLa-R cells to paclitaxel. Taken together, a possible Warburg effect activated HIF1-α-mediated signaling-induced autophagic pathway is proposed, which may provide new insight into paclitaxel chemoresistance.
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Gong W, Peng X, Li W, Guo H. Frequency stabilization of a 1083 nm fiber laser to ⁴He transition lines with optical heterodyne saturation spectroscopies. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:073103. [PMID: 25085123 DOI: 10.1063/1.4890393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Two kinds of optical heterodyne saturation spectroscopies, namely, frequency modulation spectroscopy (FMS) and modulation transfer spectroscopy (MTS), are demonstrated for locking a fiber laser to the transition lines of metastable (4)He atoms around 1083 nm. The servo-loop error signals of FMS and MTS for stabilizing laser frequency are optimized by studying the dependence of the peak-to-peak amplitude and slope on the optical power of pump and probe beams. A comparison of the stabilization performances of FMS/MTS and polarization spectroscopy (PS) is presented, which shows that MTS exhibits relatively superior performance with the least laser frequency fluctuation due to its flat-background dispersive signal, originated from the four-wave mixing process. The Allan deviation of the stabilized laser frequency is 5.4 × 10(-12)@100 s with MTS for data acquired in 1000 s, which is sufficiently applicable for fields like laser cooling, optical pumping, and optical magnetometry.
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Peng X, Xie G, Wang Z, Lin H, Zhou T, Xiang P, Jiang Y, Yang S, Wei Y, Yu L, Zhao Y. SKLB-163, a new benzothiazole-2-thiol derivative, exhibits potent anticancer activity by affecting RhoGDI/JNK-1 signaling pathway. Cell Death Dis 2014; 5:e1143. [PMID: 24675461 PMCID: PMC3973246 DOI: 10.1038/cddis.2014.107] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 01/21/2014] [Accepted: 01/21/2014] [Indexed: 02/05/2023]
Abstract
Small-molecule inhibitors are an attractive therapeutic approach for most types of human cancers. SKLB-163, a novel benzothiazole-2-thiol derivative, was developed via computer-aided drug design and de novo synthesis. MTT assay showed it had potent anti-proliferative activity on various human cancer cells. Treatment of cancer cells with SKLB-163 induced obvious apoptosis and inhibited proliferation in vitro. SKLB-163 administered p.o. showed a marked antitumor activity in vivo. Proteomic techniques were employed to identify possible drug target proteins. The data showed molecular mechanism of action might be involved in downregulation of RhoGDI, which finally contributed to increased apoptosis and inhibited proliferation. These findings provided the potential value of SKLB-163 as a novel candidate antitumor drug.
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Xiao Y, Peng X, Ma N, Li TC, Xia E. The expression of cyclooxygenase-2 and vascular endothelial growth factor in the endometrium during the peri-implantation period in women with and without polyps. HUM FERTIL 2014; 17:67-71. [PMID: 24471989 DOI: 10.3109/14647273.2013.868933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE This prospective study was designed to determine whether the expression of cyclooxygenase-2 (COX-2) and vascular endothelial growth factor (VEGF) in the endometrial tissue obtained from the peri-implantation period of women with endometrial polyp (EP) differs from that of control subjects without a polyp. METHODS Endometrial samples were collected from 30 patients with EP and 30 control subjects without EP, in the mid-secretory phase. The expression of COX-2 and VEGF in the endometrium was examined with the use of immunohistochemistry. RESULTS COX-2 and VEGF were predominantly expressed in endometrial glands. The expression of COX-2 and VEGF in the endometrium obtained from women with EP was lower than that of control subjects. CONCLUSION The reduced expression of COX-2 and VEGF in the endometrium of women with EP may account for the association between EP and infertility.
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Xin C, Wang J, Zhang W, Wang L, Peng X. Retinal and choroidal thickness evaluation by SD-OCT in adults with obstructive sleep apnea-hypopnea syndrome (OSAS). Eye (Lond) 2014; 28:415-21. [PMID: 24406421 DOI: 10.1038/eye.2013.307] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 11/25/2013] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE To assess the macular retina and choroidal thickness change in patients with obstructive sleep apnea-hypopnea syndrome (OSAS) with no significant symptoms and pathological changes in the fundus using spectral domain-optical coherence tomography. METHODS This prospective, observational case-control study consisted of 53 eyes of 53 patients with OSAS and 12 eyes of 12 age-matched controls. Macular and choroidal thicknesses were measured by optical coherence tomography. RESULTS The foveal and nasal macular thicknesses were significantly different between four groups (P=0.001, P=0.016). The foveal thickness of the control group was significantly thinner than that of the severe group (P=0.000). The nasal macular thickness of the control group was significantly thinner than that of the severe group (P=0.008). A significant correlation was found between oxygen desaturation index (ODI) and macular center thickness (r=0.357, R(2)=0.127, P=0.004), with an ODI coefficient of 0.457 (P=0.004). Similarly, a significant correlation was found between ODI and nasal macular thickness (r=0.265, R(2)=0.070, P=0.033), with an ODI coefficient of 0.233 (P=0.033). The subfoveal choroidal thickness was significantly different among the groups (F=3.657, P=0.017). The subfoveal choroidal thickness of the severe group was significantly thinner than that of the control group, mild group, and moderate group (P=0.023, 0.006, and 0.036, respectively). The choroidal thickness 1 mm nasal to the fovea was significantly different between the groups after correcting for age and diopter (F=3.411, P=0.023). The choroidal thickness 1 mm nasal to the fovea was significantly thinner in the severe group compared with the control group and mild group (P=0.013 and 0.010, respectively). Choroidal thickness was significantly correlated with diopter (r=0.520, R(2)=0.270, P<0.001), with a coefficient of 0.327 (P<0.001), and with ODI (r=0.520, R(2)=0.165, P=0.001), with a coefficient of -0.370 (P=0.001). CONCLUSIONS OSAS patients showed decreased foveal and nasal macular thickness, similar to the subfoveal and nasal choroidal thickness. These findings suggest that, because of intermittent hypoxia, OSAS might change the retinal and choroidal blood supply.
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Peng X, Sun P, Novick D, Andrews J, Sun S. Real-world comparison of health care utilization between duloxetine and pregabalin initiators with fibromyalgia. J Pain Res 2014; 7:37-46. [PMID: 24470771 PMCID: PMC3891762 DOI: 10.2147/jpr.s51636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objectives To compare health care utilization of duloxetine initiators and pregabalin initiators among fibromyalgia patients in a real-world setting. Methods A retrospective cohort study was conducted based on a US national commercial health claims database (2006–2009). Fibromyalgia patients who initiated duloxetine or pregabalin in 2008, aged 18–64 years, and who maintained continuous health insurance coverage 1 year before and 1 year after initiation were assigned to duloxetine or pregabalin cohorts on the basis of their initiated agent. Patients who had pill coverage of the agents over the course of 90 days preceding the initiation were excluded. The two comparative cohorts were constructed using propensity score greedy match methods. Descriptive analysis and paired t-test were performed to compare health care utilization rates in the postinitiation year and the changes of these rates from the preinitiation year to the postinitiation year. Results Both matched cohorts (n=1,265 pairs) had a similar mean initiation age (49–50 years), percentage of women (87%–88%), and prevalence of baseline comorbid conditions (neuropathic pain other than diabetic peripheral neuropathic pain, low back pain, cardiovascular disease, hypertension, headache or migraine, and osteoarthritis). In the preinitiation year, both cohorts had similar inpatient, outpatient, and medication utilization rates (inpatient, 15.7%–16.1%; outpatient, 100.0%; medication, 97.9%–98.7%). The utilization rates diverged in the postinitiation year, with the pregabalin cohort using more fibromyalgia-related inpatient care (3.2% versus 2.2%; P<0.05), any inpatient care (19.3% versus 16.8%; P<0.05), and fibromyalgia-related outpatient care (62.1% versus 51.8%; P<0.05). From the preinitiation period to the postinitiation period, the duloxetine cohort experienced decreases in certain utilization rates, whereas the pregabalin cohort had increases (percentage of patients with a fibromyalgia-related admission, −1.2% versus 0.4% [P<0.01]; number of fibromyalgia-related outpatient claims, −1.7 versus 4.7 [P<0.01]). Conclusion Fibromyalgia patients initiating pregabalin tended to consume more fibromyalgia-related inpatient and outpatient care in the first postinitiation year, whereas fibromyalgia patients initiating duloxetine tended to have lower utilization rates of fibromyalgia-related inpatient care in the postinitiation year than in the preinitiation year.
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Zheng W, Zhang R, Wu X, Ren Y, Nong X, Gu X, Wang S, Peng X, Yang G. Evaluating troponin C fromPsoroptes cuniculias a diagnostic antigen for a dot-ELISA assay to diagnose mite infestations in rabbits. Parasite Immunol 2014; 36:53-9. [DOI: 10.1111/pim.12076] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 09/12/2013] [Indexed: 11/27/2022]
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Novick D, Montgomery W, Moneta V, Peng X, Brugnoli R, Haro J. EPA-1087 - Treatment patterns in asian patients with a major depressive episode. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78365-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Zhuang M, Zhu D, Huang L, Peng X, Qiu Q, Wu R, Lin Z, Chen Z. EP-1609: Volumetric modulated arcs with flattening filter-free beams for recurrent nasopharyngeal carcinoma. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31727-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lu L, Shi J, Li Q, Peng X, Dong L, Li Y, Dai P, Wang Y, Guo E, Zhou F, Liu Z. Effects of liver diseases on drug-metabolizing enzymes: implications for drug fate alterations and nano-therapeutic openings. Curr Med Chem 2013; 21:2522-41. [PMID: 24358976 DOI: 10.2174/0929867321666131212144016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 06/10/2013] [Accepted: 12/06/2013] [Indexed: 11/22/2022]
Abstract
Metabolizing and eliminating toxic chemicals in the liver are key processes in the body's defense system. Drug-metabolizing enzymes (DMEs) play central roles in such processes. The activity and expression of several key DMEs are changed in various liver diseases and thus lead to significantly altered drug disposition. This phenomenon severely affects the pharmacotherapy of clinical medications in terms of the safety and efficacy of drug responses. This review highlights liver physiological functions, altered DMEs, and altered drug disposition in liver diseases. Moreover, the implications of changes in DMEs on the fate of clinically relevant drugs are also discussed. Pregnane X receptor and constitutive androstane receptor are two liver-enriched nuclear receptors originally defined as xenobiotic sensors that affect regulation of DMEs. Altered regulation of DMEs in liver diseases contributes to the development of powerful in vitro and in vivo tools to predict drug responses and options for improved drug delivery and development. Although a number of treatment drugs are available for liver diseases, they are limited by their low drug concentration in the target site, presence of side effects, and instability in the human body. The nanoparticle drug delivery system has recently attracted research attention because of its potential to offer solutions to current obstacles that involve the use of therapeutic drugs for liver diseases. Conclusively, this review aims to improve understanding on the regulation of DMEs in liver diseases and on corresponding implications in drug disposition, including novel therapeutic medications.
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Ren Z, Zhou R, Deng J, Zuo Z, Peng X, Wang Y, Wang Y, Yu S, Shen L, Cui H, Fang J. Effects of the Fusarium toxin zearalenone (ZEA) and/or deoxynivalenol (DON) on the serum IgA, IgG and IgM levels in mice. FOOD AGR IMMUNOL 2013. [DOI: 10.1080/09540105.2013.867928] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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248
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Lu J, Xu X, Liu X, Peng Y, Zhang B, Wang L, Luo H, Peng X, Li G, Tian W, He M, Li X. Predictive value of miR-9 as a potential biomarker for nasopharyngeal carcinoma metastasis. Br J Cancer 2013; 110:392-8. [PMID: 24327016 PMCID: PMC3899774 DOI: 10.1038/bjc.2013.751] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 10/30/2013] [Accepted: 11/05/2013] [Indexed: 01/05/2023] Open
Abstract
Background: Nasopharyngeal carcinoma (NPC) has a distinctive geographic distribution and is characterised by its strong tendency of metastasis. We aimed to examine the microRNA (miRNA) expression profiles in plasma samples of NPC patients to explore their clinical significance in disease development and progression. Methods: This study was divided into four steps: (1) confirmation of differentially expressed miRNAs using microarray analysis and quantitative PCR validation; (2) comparison of plasma miR-9 levels during NPC progression; (3) evaluation of the predictive performance of plasma miR-9 as a biomarker for NPC metastasis; and (4) comparison of plasma miR-9 levels between pre- and post-treatment samples. Results: Plasma microarray profiling identified 33 differentially expressed miRNAs between NPC patients and healthy volunteers. The significantly declined level of miR-9 in NPC patients was confirmed through two-stage validation. The low level of plasma miR-9 was significantly correlated with worse lymphatic invasion and advanced TNM stage. The plasma miR-9 could distinguish locoregional from metastatic NPC cases with a high sensitivity and specificity. Furthermore, the plasma miR-9 level was significantly elevated in post-treatment plasma compared with those pre-treatment samples. Conclusion: Our study reports that plasma miR-9 may serve as a useful biomarker to predict NPC metastasis and to monitor tumour dynamics.
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Peng X, Xu H, Jones B, Chen S, Zhou H. Silicified virus-like nanoparticles in an extreme thermal environment: implications for the preservation of viruses in the geological record. GEOBIOLOGY 2013; 11:511-526. [PMID: 24102946 DOI: 10.1111/gbi.12052] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 07/20/2013] [Indexed: 06/02/2023]
Abstract
Biofilms that grow around Gumingquan hot spring (T = 71 °C, pH = 9.2) in the Rehai geothermal area, Tengchong, China, are formed of various cyanobacteria, Firmicutes, Aquificae, Thermodesulfobacteria, Desulfurococcales, and Thermoproteales. Silicified virus-like nanoparticles, 40-200 nm in diameter, are common inside the microbial cells and the extracellular polymeric substances around the cells. These nanoparticles, which are formed of a core encased by a silica cortex, are morphologically akin to known viruses and directly comparable to silicified virus-like particles that were produced in biofilms cultured in the laboratory. The information obtained from examination of the natural and laboratory-produced samples suggests that viruses can be preserved by silicification, especially while they are still encased in their host cells. These results expand our views of virus-host mineral interaction in extreme thermal environments and imply that viruses can be potentially preserved and identified in the geological record.
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Peng X, Zhang MQZ, Conserva F, Hosny G, Selivanova G, Bykov VJN, Arnér ESJ, Wiman KG. APR-246/PRIMA-1MET inhibits thioredoxin reductase 1 and converts the enzyme to a dedicated NADPH oxidase. Cell Death Dis 2013; 4:e881. [PMID: 24157875 PMCID: PMC3920950 DOI: 10.1038/cddis.2013.417] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 09/13/2013] [Accepted: 09/23/2013] [Indexed: 01/05/2023]
Abstract
The low-molecular-weight compound APR-246 (PRIMA-1(MET)) restores wild-type conformation and function to mutant p53, and triggers apoptosis in tumor cells. We show here that APR-246 also targets the selenoprotein thioredoxin reductase 1 (TrxR1), a key regulator of cellular redox balance. APR-246 inhibited both recombinant TrxR1 in vitro and TrxR1 in cells. A Sec-to-Cys mutant of TrxR1 was not inhibited by APR-246, suggesting targeting of the selenocysteine residue in wild-type TrxR1. Preheated APR-246 and its conversion product methylene quinuclidinone (MQ) were much more efficient TrxR1 inhibitors than APR-246 itself, indicating that MQ is the active compound responsible for TrxR1 enzyme inhibition. TrxR1 inhibited by MQ was still functional as a pro-oxidant NADPH oxidase. Knockdown of TrxR1 caused a partial and reproducible attenuation of APR-246-induced tumor cell death independently of p53 status. Cellular TrxR1 activity was also inhibited by APR-246 irrespective of p53 status. We show that APR-246 can directly affect cellular redox status via targeting of TrxR1. Our findings provide an explanation for the previously observed effects of APR-246 on tumor cells lacking mutant p53.
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