101
|
Yi J, Xiao J, Li H, Li Y, Li X, Zhao Z. Effectiveness of adjunctive interventions for accelerating orthodontic tooth movement: a systematic review of systematic reviews. J Oral Rehabil 2017; 44:636-654. [PMID: 28301678 DOI: 10.1111/joor.12509] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2017] [Indexed: 02/05/2023]
|
102
|
Liu L, Wasson M, Butler K, Yi J. 8: Retroperitoneal approach for bilateral salpingo-oophorectomy. Am J Obstet Gynecol 2017. [DOI: 10.1016/j.ajog.2016.12.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
103
|
Rittmeyer A, Smith D, Vansteenkiste J, Fehrenbacher L, Park K, Mazieres J, Artal-Cortes A, Lewanski C, Braiteh F, Yi J, He P, Zou W, Waterkamp D, Ballinger M, Chen DS, Sandler A, Spira AI. Updated survival and biomarker analyses of a randomized phase II study of atezolizumab vs. docetaxel in 2L/3L NSCLC (POPLAR). Pneumologie 2017. [DOI: 10.1055/s-0037-1598330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
104
|
Gan J, Yi J, Zhong M, Cao X, Jin X, Liu W, Zhu X. Abnormal white matter structural connectivity in treatment-naïve young adults with borderline personality disorder. Acta Psychiatr Scand 2016; 134:494-503. [PMID: 27611589 DOI: 10.1111/acps.12640] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/15/2016] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The pathogenesis of borderline personality disorder (BPD) is not well understood. We examined the microstructure of white matter in patients with BPD. METHOD Treatment-naïve young adult with BPD (N = 30) and young-adult healthy controls (HCs; N = 31) were subjected diffusion tensor imaging (DTI). Microstructural parameters were analyzed via tract-based spatial statistics (TBSS) and post hoc tractography. RESULTS TBSS analysis revealed that, relative to the HC group, the BPD group had significantly lower fractional anisotropy (FA) values in the genu and body of the corpus callosum (CC), right superior corona radiate, right anterior corona radiate, as well as higher radial diffusivity (RD) in the left anterior thalamic radiation. Tractography showed that FA values of fiber bundles passing through the fornix were significantly reduced in BPD group relative to HCs. No significant correlations were observed between clinical symptom and DTI indices in BPD group (FDR corrected). CONCLUSION Focal microstructural alterations were found in BPD group, mainly in the limbic system and CC. The present findings support the fronto-limbic disconnectivity hypothesis and suggest that abnormal maturation of white matter structures may play an important role in mechanism of BPD.
Collapse
|
105
|
Dave A, Yi J. Perspectives on Preparedness for AAGL Fellowship in Minimally Invasive Gynecology: A Quantitative Assessment of Program Directors and First-Year Fellows. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
106
|
Dave A, Yi J, Javier M. Robotic Excision of Suture Entrapment of the Lumbosacral Trunk. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
107
|
Zhou Y, Wang HX, Li YG, Li Y, Chen WJ, Yi J, Deng ZC. The conceptual design of interferometer/polarimeter system on HL-2M. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:11E107. [PMID: 27910533 DOI: 10.1063/1.4959911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
HL-2M is a new medium-sized tokamak with major radius of 1.78 m, minor radius of 0.65 m, and aspect ratio of 2.8 and will be finished soon. In the conceptual design, a double-pass, horizontal view, multi-channel far-infrared (FIR) laser interferometer/polarimeter system (at 432 μm) is proposed to simultaneously measure the phase change and the Faraday rotation for density and current profile reconstruction. A vertical CO2 dispersion interferometer system (with wavelength of 10.6 μm and 5.3 μm) is designed to measure the line density, which will mainly be used for density feedback. The performance of the system is expected to meet the requirement of the measurements on HL-2M, with phase accuracy ∼0.1°, time resolution ∼1 μs, spatial resolution ∼7.2 cm, and density measurement range of 1 × 10 18-1 ×1021 m-3.
Collapse
|
108
|
Yuan L, Yi J, Lin Q, Xu H, Deng X, Xiong W, Xiao J, Jiang C, Yuan X, Chen Y, Deng H. Identification of a PRX variant in a Chinese family with congenital cataract by exome sequencing. QJM 2016; 109:731-735. [PMID: 27081207 DOI: 10.1093/qjmed/hcw058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 03/16/2016] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Congenital cataract is a common cause of childhood vision impairment or blindness with genetic and clinical heterogeneity. The aim of this study was to identify the disease-associated gene in a Chinese family with congenital cataract. METHODS A four-generation Chinese family with three enrolled patients suffering from congenital cataract was studied. Detailed family history and clinical data of all the members were collected and recorded. Exome sequencing was applied in the proband to screen potential genetic variants, and then Sanger sequencing was used to verify the variant within the family. RESULTS A heterozygous variant, c.3673G > A (p.V1225M), in the periaxin gene (PRX) was identified in three patients and two asymptomatic individuals of the family. The variant was absent in the other three unaffected family members and in 3290 ethnically matched in-house controls from BGI-Shenzhen. CONCLUSIONS By utilizing both exome sequencing and Sanger sequencing, we identified a missense variant in the PRX gene that is possibly associated with disease in this family. Our finding may broaden the spectrum of genes associated with congenital cataract, and may provide insights into lens development, pathogenic mechanism, future clinical genetic diagnosis and therapy of congenital cataract.
Collapse
|
109
|
Dave A, Yi J. Why Did Current Fellows Choose a Fellowship in Minimally Invasive Gynecology? A Qualitative Evaluation. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
110
|
Rosén A, Yi J, Kirsch I, Kaptchuk TJ, Ingvar M, Jensen KB. Effects of subtle cognitive manipulations on placebo analgesia - An implicit priming study. Eur J Pain 2016; 21:594-604. [PMID: 27748563 PMCID: PMC5363385 DOI: 10.1002/ejp.961] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/08/2016] [Indexed: 12/17/2022]
Abstract
Background Expectancy is widely accepted as a key contributor to placebo effects. However, it is not known whether non‐conscious expectancies achieved through semantic priming may contribute to placebo analgesia. In this study, we investigated if an implicit priming procedure, where participants were unaware of the intended priming influence, affected placebo analgesia. Methods In a double‐blind experiment, healthy participants (n = 36) were randomized to different implicit priming types; one aimed at increasing positive expectations and one neutral control condition. First, pain calibration (thermal) and a credibility demonstration of the placebo analgesic device were performed. In a second step, an independent experimenter administered the priming task; Scrambled Sentence Test. Then, pain sensitivity was assessed while telling participants that the analgesic device was either turned on (placebo) or turned off (baseline). Pain responses were recorded on a 0–100 Numeric Response Scale. Results Overall, there was a significant placebo effect (p < 0.001), however, the priming conditions (positive/neutral) did not lead to differences in placebo outcome. Prior experience of pain relief (during initial pain testing) correlated significantly with placebo analgesia (p < 0.001) and explained 34% of placebo variance. Trait neuroticism correlated positively with placebo analgesia (p < 0.05) and explained 21% of placebo variance. Conclusions Priming is one of many ways to influence behaviour, and non‐conscious activation of positive expectations could theoretically affect placebo analgesia. Yet, we found no SST priming effect on placebo analgesia. Instead, our data point to the significance of prior experience of pain relief, trait neuroticism and social interaction with the treating clinician. Significance Our findings challenge the role of semantic priming as a behavioural modifier that may shape expectations of pain relief, and affect placebo analgesia.
Collapse
|
111
|
Wong H, Yi J, Huang X, Luo J, Wang K, Zhang Y, Qu Y, Wu R, Zhang S, Liu Q, Xiao J, Li S, Xu G, Gao L. Peripheral Blood CD4/CD8 Ratio Is More Predictive of Progression-Free Survival Than TNM Stage in Nasopharyngeal Cancer Treated With Intensity Modulated Radiation Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
112
|
Sun S, Gao L, Yi J, Luo J, Xiao J, Li S, Zhang S, Huang X, Qu Y, Wang K, Zhang Y, Liu Q, Wu R, Xu G. The Long-Term Treatment Outcomes of Mucosal Melanoma of the Head and Neck: A Clinical Review of 157 Cases. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
113
|
Li W, Hu XH, Yi J, Yao L, Huang GL. [Hypoglossia with cystic and solid lesions in floor of mouth: a case report]. ZHONGHUA KOU QIANG YI XUE ZA ZHI = ZHONGHUA KOUQIANG YIXUE ZAZHI = CHINESE JOURNAL OF STOMATOLOGY 2016; 51:574-5. [PMID: 27596352 DOI: 10.3760/cma.j.issn.1002-0098.2016.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
114
|
Jo SY, Park SH, Kim IS, Yi J, Kim HH, Chang CL. Performance evaluation of recently launched Sysmex XN-550 Automatic Hematology Analyzer. Int J Lab Hematol 2016; 39:e4-e9. [PMID: 27566446 DOI: 10.1111/ijlh.12571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
115
|
Wang YW, Bian XL, Wu SW, Hussain I, Jia YD, Yi J, Wang G. Rate dependent of strength in metallic glasses at different temperatures. Sci Rep 2016; 6:27747. [PMID: 27270688 PMCID: PMC4897709 DOI: 10.1038/srep27747] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 05/23/2016] [Indexed: 11/09/2022] Open
Abstract
The correlation between the strength at the macroscale and the elastic deformation as well as shear cracking behavior at the microscale of bulk metallic glasses (BMGs) is investigated. The temperatures of 298 K and 77 K as well as the strain rate ranging from 10−6 s−1 to 10−2 s−1 are applied to the BMGs, in which the mechanical responses of the BMGs are profiled through the compression tests. The yield strength is associated with the activation of the elementary deformation unit, which is insensitive to the strain rate. The maximum compressive strength is linked to the crack propagation during shear fracture process, which is influenced by the strain rate. The cryogenic temperature of 77 K significantly improves the yield strength and the maximum compressive strength of the BMGs.
Collapse
|
116
|
Jin X, Yi J, Xie C. SU-F-P-64: The Impact of Plan Complexity Parameters On the Plan Quality and Deliverability of Volumetric Modulated Arc Therapy with Canonical Correlation Analysis. Med Phys 2016. [DOI: 10.1118/1.4955772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
117
|
Jin X, Yi J, Xie C. SU-F-P-63: Individual Volume Based 3D Gamma Indices for Pretreatment VMAT QA. Med Phys 2016. [DOI: 10.1118/1.4955771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
118
|
Yi J, Delp MS, Gilbert ER, Siegel PB, Cline MA. Anorexia is Associated with Stress-Dependent Orexigenic Responses to Exogenous Neuropeptide Y. J Neuroendocrinol 2016; 28. [PMID: 26924179 DOI: 10.1111/jne.12378] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 02/22/2016] [Accepted: 02/23/2016] [Indexed: 11/28/2022]
Abstract
Chicken lines that have been divergently selected for either low (LWS) or high (HWS) body weight at 56 days of age for more than 57 generations have different feeding behaviours in response to a range of i.c.v. injected neurotransmitters. The LWS have different severities of anorexia, whereas the HWS become obese. Previously, we demonstrated that LWS chicks did not respond, whereas HWS chicks increased food intake, after central injection of neuropeptide Y (NPY). The present study aimed to determine the molecular mechanisms underlying the loss of orexigenic function of NPY in LWS. Chicks were divided into four groups: stressed LWS and HWS on day of hatch, and control LWS and HWS. The stressor was a combination of food deprivation and cold exposure. On day 5 post-hatch, each chick received an i.c.v. injection of vehicle or 0.2 nmol of NPY. Only the LWS stressed group did not increase food intake in response to i.c.v. NPY. Hypothalamic mRNA abundance of appetite-associated factors was measured at 1 h post-injection. Interactions of genetic line, stress and NPY treatment were observed for the mRNA abundance of agouti-related peptide (AgRP) and synaptotagmin 1 (SYT1). Intracerebroventricular injection of NPY decreased and increased AgRP and SYT1 mRNA, respectively, in the stressed LWS and increased AgRP mRNA in stressed HWS chicks. Stress was associated with increased NPY, orexin receptor 2, corticotrophin-releasing factor receptor 1, melanocortin receptor 3 (MC3R) and growth hormone secretagogue receptor expression. In conclusion, the loss of responsiveness to exogenous NPY in stressed LWS chicks may be a result of the decreased and increased hypothalamic expression of AgRP and MC3R, respectively. This may induce an intensification of anorexigenic melanocortin signalling pathways in LWS chicks that block the orexigenic effect of exogenous NPY. These results provide insights onto the anorexic condition across species, and especially for forms of inducible anorexia such as human anorexia nervosa.
Collapse
|
119
|
Yi J, Xu L, Lin HH. [Postoperative analgesia effect of different background volumes of ropivacaine in continuous tibial nerve block in patients with calcaneal surgery]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2016; 48:283-286. [PMID: 27080282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To observe the clinical effect of different background volumes of ropivacaine in continuous tibial nerve block of postoperative analgesia after calcaneal surgery. METHODS This study was a prospective, randomized, controlled study. Sixty cases of calcaneal visual analogue scale (ASA) I or II undergoing elective surgery were selected and randomly assigned to two groups, thirty cases in each group. The patients received popliteal fossa posterior tibial nerve block using ultrasound guided. The continuous stimulation catheter was inserted after successful position and the 0.2% ropivacaine was injected. The background volumes of the A and B groups were 5 mL/h and 3.2 mL/h. The VAS score, the sensory block and motor block of tibial nerve and common peroneal nerve, and the satisfaction of the patients at h 12, h 24 and h 48 were recorded after catheter insertion. RESULTS The VAS scores at the three time points (h 12, h 24 and h 48) on the two groups of the patients were compared, and the difference was not statistically significant (P > 0.05). The difference of the sensory block and the motor block of the tibial nerve at the three time points (h 12, h 24 and h 48) on the two groups of the patients were also compared, and the difference was not statistically significant (P> 0.05). The difference of the sensory block and the motor block of common peroneal nerve at h 48 hs was statistically significant, group A was higher than the group B (P< 0.05). The difference of the patient satisfaction at the three time points (h 12, h 24 and h 48) on the two groups was not statistically significant (P> 0.05). CONCLUSION The use of 0.2% ropivacaine with the background volume of 3.2 mL/h in continuous tibial nerve block can provide good analgesia and reduce the incidence of the sensory block and motor block of the common peroneal nerve.
Collapse
|
120
|
Butler K, Yi J, Klauschie J, Ryan D, Hentz J, Cornella J, Magtibay P, Kho R. 7: Randomized clinical trial of postoperative belladonna and opium (B&O) suppositories in vaginal surgery. Am J Obstet Gynecol 2016. [DOI: 10.1016/j.ajog.2016.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
121
|
Mansfield A, Murphy S, Peikert T, Yi J, Vasmatzis G, Wigle D, Aubry M. 70 Heterogeneity of programmed death-ligand 1 expression in multifocal lung cancer. Lung Cancer 2016. [DOI: 10.1016/s0169-5002(16)30087-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
122
|
Yi J, Yu DZ, Wang H, Liu A, Fang F, Hou Q, Han T, Zhu XH, Jiang H. A longitudinally split rabbit segmental gracilis to simulate penile erectile function: anatomic basis and animal models. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2016; 20:12-19. [PMID: 26813448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE The gracilis was once applied in reconstructing erectile function but its appearance was bulky. We aimed to design a model meeting the requirements of both reducing volume and retaining function. MATERIALS AND METHODS The gracilis muscles of 6 rabbits were harvested, applied colorful vascular perfusion and modified Sihler's intramuscular nerve staining. According to their intramuscular nerves and blood vessels, 9 rabbit right gracilis muscles were then longitudinally split into two halves. The anterior muscle bundle was selected as the functional unit and blood supply. RESULTS The intramuscular nerves and vessels were simultaneously presented on a same specimen. Their relationship suggested gracilis muscle to be composed of two relatively independent subunits. The reconstructed penis survived well, simulating erectile action satisfactorily. DISCUSSION The penis model reconstructed with longitudinally split rabbit segmental gracilis myocutaneous flap had met the requirements of both restoring erectile function and improving the appearance.
Collapse
|
123
|
Jiang Y, Guo X, Zhang J, Gao J, Wang X, Situ W, Yi J, Zhang X, Zhu X, Yao S, Huang B. Abnormalities of cortical structures in adolescent-onset conduct disorder. Psychol Med 2015; 45:3467-3479. [PMID: 26189512 DOI: 10.1017/s0033291715001361] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Converging evidence has revealed both functional and structural abnormalities in adolescents with early-onset conduct disorder (EO-CD). The neurological abnormalities underlying EO-CD may be different from that of adolescent-onset conduct disorder (AO-CD) patients. However, the cortical structure in AO-CD patients remains largely unknown. The aim of the present study was to investigate the cortical alterations in AO-CD patients. METHOD We investigated T1-weighted brain images from AO-CD patients and age-, gender- and intelligence quotient-matched controls. Cortical structures including thickness, folding and surface area were measured using the surface-based morphometric method. Furthermore, we assessed impulsivity and antisocial symptoms using the Barratt Impulsiveness Scale (BIS) and the Antisocial Process Screening Device (APSD). RESULTS Compared with the controls, we found significant cortical thinning in the paralimbic system in AO-CD patients. For the first time, we observed cortical thinning in the precuneus/posterior cingulate cortex (PCC) in AO-CD patients which has not been reported in EO-CD patients. Prominent folding abnormalities were found in the paralimbic structures and frontal cortex while diminished surface areas were shown in the precentral and inferior temporal cortex. Furthermore, cortical thickness of the paralimbic structures was found to be negatively correlated with impulsivity and antisocial behaviors measured by the BIS and APSD, respectively. CONCLUSIONS The present study indicates that AO-CD is characterized by cortical structural abnormalities in the paralimbic system, and, in particular, we highlight the potential role of deficient structures including the precuneus and PCC in the etiology of AO-CD.
Collapse
|
124
|
Chen B, Bao Y, Chen X, Yi J, Liu S, Fang Z, Zheng S, Chen J. Mir-664 promotes osteosarcoma cells proliferation via downregulating of FOXO4. Biomed Pharmacother 2015; 75:1-7. [DOI: 10.1016/j.biopha.2015.08.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 08/03/2015] [Indexed: 12/28/2022] Open
|
125
|
Stapleton PA, McBride CR, Yi J, Nurkiewicz TR. Uterine microvascular sensitivity to nanomaterial inhalation: An in vivo assessment. Toxicol Appl Pharmacol 2015; 288:420-8. [PMID: 26375943 DOI: 10.1016/j.taap.2015.08.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 07/30/2015] [Accepted: 08/19/2015] [Indexed: 12/21/2022]
Abstract
With the tremendous number and diverse applications of engineered nanomaterials incorporated in daily human activity, exposure can no longer be solely confined to occupational exposures of healthy male models. Cardiovascular and endothelial cell dysfunction have been established using in vitro and in situ preparations, but the translation to intact in vivo models is limited. Intravital microscopy has been used extensively to understand microvascular physiology while maintaining in vivo neurogenic, humoral, and myogenic control. However, a tissue specific model to assess the influences of nanomaterial exposure on female reproductive health has not been fully elucidated. Female Sprague Dawley (SD) rats were exposed to nano-TiO2 aerosols (171 ± 6 nm, 10.1 ± 0.39 mg/m(3), 5h) 24-hours prior to experimentation, leading to a calculated deposition of 42.0 ± 1.65 μg. After verifying estrus status, vital signs were monitored and the right horn of the uterus was exteriorized, gently secured over an optical pedestal, and enclosed in a warmed tissue bath using intravital microscopy techniques. After equilibration, significantly higher leukocyte-endothelium interactions were recorded in the exposed group. Arteriolar responsiveness was assessed using ionophoretically applied agents: muscarinic agonist acetylcholine (0.025 M; ACh; 20, 40, 100, and 200 nA), and nitric oxide donor sodium nitroprusside (0.05 M; SNP; 20, 40, and 100 nA), or adrenergic agonist phenylephrine (0.05 M; PE; 20, 40, and 100 nA) using glass micropipettes. Passive diameter was established by tissue superfusion with 10(-4)M adenosine. Similar to male counterparts, female SD rats present systemic microvascular dysfunction; however the ramifications associated with female health and reproduction have yet to be elucidated.
Collapse
|