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2.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-1013088

RESUMEN

Objective@#To study the effect of orthodontic traction on the roots and periodontal soft and hard tissues of buried obstructed upper incisors.@*Methods@#This study was reviewed and approved by the ethics committee, and informed consent was obtained from the patients. From January 2018 to December 2022, 40 patients who underwent orthodontic traction on impacted upper incisors were selected; those whose contralateral homonymous apical foramen was not developed were placed in group A (23 cases), and those whose contralateral homonymous apical foramen was developed were placed in group B (17 cases). Software was used to measure the root length of the impacted upper incisors in groups A and B on cone beam CT (CBCT) images before and after traction and compare the changes in alveolar bone (alveolar bone width, labral bone plate thickness, and horizontal height of alveolar bone) and keratinized gingival width between each impacted upper incisor and the corresponding contralateral tooth immediately and one year after traction@*Results@#The root length of the impacted upper incisors increased after traction compared to before traction (P<0.05). The width of the alveolar bone at the completion of traction in group A was similar to that of the contralateral homonymous tooth (P>0.05), whereas the width of the alveolar bone at the completion of traction in group B did not reach that of the contralateral homonymous tooth, with a significant difference in width (P<0.05). Neither the labial bone plate height or width in group A or B reached that of the contralateral homonymous tooth after traction (P<0.05). The keratinized gingival width on the affected side was also significantly smaller than that on the contralateral side (P<0.05), but it was increased significantly in group A at the one-year follow-up visit (P<0.05).@*Conclusion@#Tooth traction is conducive to impacted upper incisor root growth, alveolar bone reconstruction and keratinized gingival growth but cannot produce complete symmetry with respect to the contralateral side.

3.
Discov Med ; 35(176): 383-393, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-37272105

RESUMEN

BACKGROUND: Conditioned medium (CM) from human amnion-derived mesenchymal stem cells (hAMSCs) exhibits excellent pro-angiogenic capacity, and circ-100290 participates in this process. Autophagy is involved in the relevant mechanisms of angiogenesis, but it is unclear whether autophagy is related to the pro-angiogenesis effect of hAMSCs. This research sought to determine whether autophagy involved in the process of pro-angiogenesis induced by hAMSCs might be regulated by circ-100290. METHODS: Upon treatment with CM from hAMSC or 3-methyladenine (3-MA), autophagosomes in human umbilical vein endothelial cells (HUVECs) were observed by transmission electron microscopy. HUVECs' angiogenic ability was evaluated by in vitro assays (transwell, wound healing, tube formation) and an in vivo Matrigel plug assay. Specific small interfering RNAs (siRNA) or inhibitors were used to regulate circ-100290 expression. Additionally, western blot and quantitative reverse transcription-polymerase chain reaction (RT-qPCR) were used to evaluate expression of the following indicators: Beclin-1, LC3-II, matrix metalloproteinase 2 (MMP2), MMP9, vascular endothelial growth factor (VEGF)-A, and endothelial nitric oxide synthase (eNOS). RESULTS: Incubation with hAMSC-CM increased autophagy, angiogenesis and the expressions of VEGF-A and eNOS in HUVECs, all of which were inhibited by 3-MA. Knocking down circ-100290 in hAMSC-CM-treated HUVECs reduced Beclin-1 expression and inhibited autophagy. This resulted in lower angiogenesis in the Matrigel plug assay showing that reduced angiogenesis occurred after circ-100290 silencing in hAMSC-CM-treated HUVECs. CONCLUSIONS: Circ-100290 promotes autophagy-mediated angiogenesis in hAMSC-CM-treated HUVECs.


Asunto(s)
Metaloproteinasa 2 de la Matriz , Células Madre Mesenquimatosas , Humanos , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Medios de Cultivo Condicionados/farmacología , Medios de Cultivo Condicionados/metabolismo , Metaloproteinasa 2 de la Matriz/metabolismo , Factor A de Crecimiento Endotelial Vascular , Amnios/metabolismo , Beclina-1/genética , Beclina-1/metabolismo , Beclina-1/farmacología , Neovascularización Fisiológica , Autofagia , Células Madre Mesenquimatosas/metabolismo
4.
Stem Cells Dev ; 32(17-18): 539-553, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-37261998

RESUMEN

Traumatic brain injury (TBI), especially moderate or severe TBI, is one of the most devastating injuries to the nervous system, as the existing therapies for neurological defect repair have difficulty achieving satisfactory results. Neural stem cells (NSCs) therapy is a potentially effective treatment option, especially after specific genetic modifications and when used in combination with biomimetic biological scaffolds. In this study, tussah silk fibroin (TSF) scaffolds with interconnected nanofibrous structures were fabricated using a top-down method. We constructed the apelin-overexpressing NSCs that were cocultured with a TSF nanofiber scaffold (TSFNS) that simulated the extracellular matrix in vitro. To verify the therapeutic efficacy of engineered NSCs in vivo, we constructed TBI models and randomized the C57BL/6 mice into three groups: a control group, an NSC-ctrl group (transplantation of NSCs integrated on TSFNS), and an NSC-apelin group (transplantation of apelin-overexpressing NSCs integrated on TSFNS). The neurological functions of the model mice were evaluated in stages. Specimens were obtained 24 days after transplantation for immunohistochemistry, immunofluorescence, and western blot experiments, and statistical analysis was performed. The results showed that the combination of the TSFNS and apelin overexpression guided extension and elevated the proliferation and differentiation of NSCs both in vivo and in vitro. Moreover, the transplantation of TSFNS-NSCs-Apelin reduced lesion volume, enhanced angiogenesis, inhibited neuronal apoptosis, reduced blood-brain barrier damage, and mitigated neuroinflammation. In summary, TSFNS-NSC-Apelin therapy could build a microenvironment that is more conducive to neural repair to promote the recovery of injured neurological function.


Asunto(s)
Lesiones Traumáticas del Encéfalo , Fibroínas , Nanofibras , Células-Madre Neurales , Ratones , Animales , Fibroínas/farmacología , Fibroínas/química , Apelina/genética , Ratones Endogámicos C57BL , Lesiones Traumáticas del Encéfalo/patología
5.
Nutrients ; 15(2)2023 Jan 11.
Artículo en Inglés | MEDLINE | ID: mdl-36678238

RESUMEN

Drinking alcohol during adolescence has short-term and long-term effects on physical and mental health. At this stage, teenagers are greatly influenced by their schoolmates and friends. We conducted a multicenter cross-sectional study to investigate the association between school environment factors and adolescents' drinking behavior in China. Using multistage stratified cluster sampling, the study investigated 27,762 middle school students from six cities in China. The logistic regression model was used to explore the association between the school environment and adolescent alcohol drinking behaviors after adjusting for confounders, including gender, age, city, location, and smoking status. Compared with students with none of their close friends drinking, students with more than half of their close friends drinking were more likely to drink in a year (OR = 20.148, 95% CI: 17.722−22.905, p < 0.001) and in a month (OR = 13.433, 95% CI: 11.779−15.319, p < 0.001). In addition, classmates' drinking behaviors, friends' persuasion, and attending parties were risk factors for adolescents' drinking behavior, while the propaganda and regulations of banning drinking in school were protective factors. The school environment, especially friends drinking, is associated with students' drinking behavior. It is necessary to mobilize the strength of schools and peers to strengthen the prevention and control of adolescent drinking.


Asunto(s)
Conducta del Adolescente , Consumo de Alcohol en Menores , Adolescente , Humanos , Consumo de Bebidas Alcohólicas/epidemiología , Consumo de Bebidas Alcohólicas/psicología , Ciudades , Estudios Transversales , Factores de Riesgo , Conducta del Adolescente/psicología
6.
Front Nutr ; 9: 903216, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35774539

RESUMEN

Objective: Adolescents' alcohol consumption has lifetime adverse physical and mental health effects. Family environment factors have a significant influence in shaping adolescents' beliefs and habits. We conducted the multicenter cross-sectional study aiming to investigate the association between family environment factors and adolescent drinking behavior in China. Methods: The study investigated 27,762 middle school students from Beijing, Shanghai, Guangzhou, Jinan, Chengdu, and Harbin. A logistic regression model was used to explore the association between family environmental factors and adolescent drinking behavior. Participants were asked to self-report previous experiences of drinking and getting drunk to access their drinking status. Factors of family environment related to alcohol consumption included: parents' educational level, family economic status, family composition, the number of times parents drank alcohol in the past 30 days, and parents' attitudes toward their drinking behavior. The logistic regression model was used to adjust the demographic confounders, including gender, age, city, location, and smoking status, and to explore the association between family environmental factors and adolescent alcohol drinking behaviors. Results: Compared with students whose parents prohibited drinking, students who were approved drinking were more likely to drink in this year (OR = 16.544, 95%CI:15.265-17.929, P < 0.001; Full adjustment: OR = 13.111, 95% CI: 12.031-14.288, P < 0.001), drink in this month (OR = 7.791, 95% CI: 7.077-8.565, P < 0.001; Full adjustment: OR = 6.010, 95% CI: 5.439-6.641, P < 0.001). In addition, Low family economic status, not living with the mother, parents' ambivalent attitudes toward their children's drinking and parental drinking were risk factors for drinking among middle school students. Conclusion: The family environment, especially parents' attitudes, is associated with students' drinking and drunken behavior. Mobilizing the power of parents may play a positive role in the effective prevention and control of adolescent drinking.

7.
ACS Omega ; 7(23): 19979-19987, 2022 Jun 14.
Artículo en Inglés | MEDLINE | ID: mdl-35721914

RESUMEN

Biopolymer nanofiber membranes are attracting interest as promising biomaterial scaffolds with a remarkable range of structural and functional performances for guided bone regeneration (GBR). In this study, tussah silk nanofiber (TSn) and Bombyx mori silk nanofiber (BSn) membranes were prepared by physical shearing. The diameters of the TSn and BSn membranes were 146.09 ± 63.56 and 120.99 ± 91.32 nm, respectively. TSn showed a Young's modulus of 3.61 ± 0.64 GPa and a tensile strength of 74.27 ± 5.19 MPa, which were superior to those of BSn, with a Young's modulus of 0.16 ± 0.03 GPa and a tensile strength of 4.86 ± 0.61 MPa. The potential of TSn and BSn membranes to guide bone regeneration was explored. In vitro, the TSn membrane exhibited significantly higher cell proliferation for MC3T3-E1 cells than the BSn membrane. In a cranial bone defect in a rat model, the TSn and BSn membranes displayed superior bone regeneration compared to the control because the membrane prevented the ingrowth of soft tissue to the defective area. Compared to the BSn membrane, the TSn membrane improved damaged bone regeneration, presumably due to its superior mechanical properties, high osteoconductivity, and increased cell proliferation. The TSn membrane has a bionic structure, excellent mechanical properties, and greater biocompatibility, making it an ideal candidate for GBR.

8.
J Anal Toxicol ; 46(7): 743-749, 2022 Aug 13.
Artículo en Inglés | MEDLINE | ID: mdl-34665862

RESUMEN

The investigation of the 2019-2020 E-cigarette or Vaping Product Use-Associated Lung Injury (EVALI) outbreak in New York State provided a unique opportunity to examine the formulations and chemical components found in clandestine cannabis-containing e-liquids. In this EVALI investigation, it was determined that an unusually high proportion (16%) of the cannabis e-liquids analyzed contained significant levels of ∆8-tetrahydrocannabinol (∆8-THC). Although not thought to be the causative agent in the outbreak, the manufacturing origin of vaping e-liquids containing large concentrations of ∆8-THC was of great interest, since high ∆8-THC concentrations are not observed in the extracts of common cannabis strains. A principal component analysis of multiple cannabinoid concentrations revealed clusters of similar or identical ∆8-THC-containing products. This technique may be useful in identifying common manufacturing sources in this and future investigations. Several possible manufacturing methods to enrich ∆8-THC appear in literature and are discussed based on their likelihood as sources of this cannabinoid in these samples from the EVALI investigation. The presence of high levels of ∆8-THC in numerous illicit vaping products may implicate cannabidiol, which is readily available at low cost, as its synthetic precursor.


Asunto(s)
Cannabinoides , Sistemas Electrónicos de Liberación de Nicotina , Alucinógenos , Vapeo , Dronabinol , New York
9.
Front Bioeng Biotechnol ; 9: 746016, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34926415

RESUMEN

Nanofibers as elements for bioscaffolds are pushing the development of tissue engineering. In this study, tussah silk was mechanically disintegrated into nanofibers dispersed in aqueous solution which was cast to generate tussah silk fibroin (TSF) nanofiber mats. The effect of treatment time on the morphology, structure, and mechanical properties of nanofiber mats was examined. SEM indicated decreasing diameter of the nanofiber with shearing time, and the diameter of the nanofiber was 139.7 nm after 30 min treatment. These nanofiber mats exhibited excellent mechanical properties; the breaking strength increased from 26.31 to 72.68 MPa with the decrease of fiber diameter from 196.5 to 139.7 nm. The particulate debris was observed on protease XIV degraded nanofiber mats, and the weight loss was greater than 10% after 30 days in vitro degradation. The cell compatibility experiment confirmed adhesion and spreading of NIH-3T3 cells and enhanced cell proliferation on TSF nanofiber mats compared to that on Bombyx mori silk nanofiber mats. In conclusion, results indicate that TSF nanofiber mats prepared in this study are mechanically robust, slow biodegradable, and biocompatible materials, and have promising application in regenerative medicine.

10.
Front Chem ; 9: 748935, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34778204

RESUMEN

E-cigarette or vaping product use-associated lung injury (EVALI) is a serious pulmonary condition that is associated with the extended use of certain vaping products. EVALI was first characterized in the summer of 2019 and has since been reported in all 50 U.S. states. From August 2019 through June 2021, the New York State Department of Health has reported more than 197 confirmed cases emanating from all regions of the state. The Wadsworth Center at the New York State Department of Heath received vaping cartridges recovered from EVALI patients for chemical analysis of their contents. Untargeted analytical methods using gas chromatography-mass spectrometry and liquid chromatography-high-resolution mass spectrometry as well as targeted analyses for a variety of analytes including cannabinoids, pesticides, vitamin E acetate (VEA) and mycotoxins were used to characterize the composition of the vaping fluids and several commercial vaping fluid additives. From the analyses of the 284 e-cigarette devices recovered from patients, 82 were found to be nicotine-containing pods, and 202 devices containing cannabis oil, apparently from unauthorized or black-market dealers. The fluids from the cannabis-oil cartridges tended to have lower levels of THCs (Δ9-tetrahydrocannabinol + Δ8-tetrahydrocannabinol) and total cannabinoids compared with those of commercially produced formulations and contained significant levels of diluents including VEA, medium-chain triglycerides, polyethylene glycol, and castor oil. VEA was the diluent most frequently detected, which was present in 132 (65.3%) of the vaping fluids that contained cannabis oil. When present, VEA ranged from 2.0 to 67.8% of the total mass of the oil with a mean content of 37.0%. In some cases, two or three diluents were detected in the same sample. The ratio of VEA to THCs varied widely, from 0.07 to 5.34. VEA and specifically the high ratios of VEA to THCs in black-market vaping fluids may be causative in EVALI. The safety of additional components and additives that are present in vaping fluids are likewise of concern.

11.
BMC Infect Dis ; 21(1): 1040, 2021 Oct 07.
Artículo en Inglés | MEDLINE | ID: mdl-34620102

RESUMEN

BACKGROUND: Coronavirus disease 2019 (COVID-19) is a declared global pandemic, causing a lot of death. How to quickly screen risk population for severe patients is essential for decreasing the mortality. Many of the predictors might not be available in all hospitals, so it is necessary to develop a simpler screening tool with predictors which can be easily obtained for wide wise. METHODS: This retrospective study included all the 813 confirmed cases diagnosed with COVID-19 before March 2nd, 2020 in a city of Hubei Province in China. Data of the COVID-19 patients including clinical and epidemiological features were collected through Chinese Disease Control and Prevention Information System. Predictors were selected by logistic regression, and then categorized to four different level risk factors. A screening tool for severe patient with COVID-19 was developed and tested by ROC curve. RESULTS: Seven early predictors for severe patients with COVID-19 were selected, including chronic kidney disease (OR 14.7), age above 60 (OR 5.6), lymphocyte count less than < 0.8 × 109 per L (OR 2.5), Neutrophil to Lymphocyte Ratio larger than 4.7 (OR 2.2), high fever with temperature ≥ 38.5℃ (OR 2.2), male (OR 2.2), cardiovascular related diseases (OR 2.0). The Area Under the ROC Curve of the screening tool developed by above seven predictors was 0.798 (95% CI 0.747-0.849), and its best cut-off value is > 4.5, with sensitivity 72.0% and specificity 75.3%. CONCLUSIONS: This newly developed screening tool can be a good choice for early prediction and alert for severe case especially in the condition of overload health service.


Asunto(s)
COVID-19 , Humanos , Masculino , Tamizaje Masivo , Estudios Retrospectivos , Factores de Riesgo , SARS-CoV-2
12.
J Bioenerg Biomembr ; 53(4): 393-403, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34076840

RESUMEN

Inflammation and renal cell apoptosis participate in sepsis-induced acute kidney injury. Previous research found the upregulation of long non-coding RNA Linc-KIAA1737-2 in hypoxia- or inflammation-challenged human proximal tubular epithelial cells, but its role in sepsis-induced acute kidney injury is underexplored. In this research, we found that Linc-KIAA1737-2 could be upregulated in HK-2 human proximal tubular epithelial cells by LPS treatment, and knock-down of this lncRNA significantly attenuated LPS-induced apoptosis in HK-2 cells, while its overexpression showed opposite effect. MiR-27a-3p was confirmed to interact with Linc-KIAA1737-2 in HK-2 cells by RNA pull-down and dual-luciferase assay. MiR-27a-3p mimic transfection significantly attenuated LPS-induced HK-2 cell apoptosis by downregulating the protein levels of TLR4 and NF-κB, which was overturned by overexpression of Linc-KIAA1737-2. Our results suggested that Linc-KIAA1737-2 could promote LPS-induced apoptosis in HK-2 cells, and presumably sepsis-induced acute kidney injury, by regulating the miR-27a-3p/TLR4/NF-κB axis.


Asunto(s)
Lipopolisacáridos/metabolismo , MicroARNs/metabolismo , FN-kappa B/metabolismo , ARN Largo no Codificante/genética , Apoptosis , Humanos , Transfección
14.
Nat Food ; 2(7): 519-528, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-37117678

RESUMEN

Food loss and waste (FLW) hampers global food security, human health and environmental sustainability. However, monitoring and benchmarking FLW reduction is often constrained by the lack of reliable and consistent data, especially for emerging economies. Here we use 6 yr large-scale field surveys and literature data to quantify the FLW of major agrifood products along the entire farm-to-fork chain in China. We show that 27% of food annually produced for human consumption in the country (349 ± 4 Mt) is lost or wasted; 45% of this is associated with postharvest handling and storage and 13% with out-of-home consumption activities. We also show that the land, water, carbon, nitrogen and phosphorus footprints associated with total FLW are similar to those of a medium-sized country (such as the United Kingdom's in the case of carbon footprint). These results highlight the importance of better primary data to inform FLW reduction actions and ensure food security and sustainability.

15.
ACS Appl Bio Mater ; 4(2): 1369-1380, 2021 02 15.
Artículo en Inglés | MEDLINE | ID: mdl-35014488

RESUMEN

In this paper, three different mass fractions of sodium carbonate were used for degumming to obtain different degrees of damaged silk fibroin fibers, which were then treated with formic acid to shrink and bond them into 3D scaffolds. The structure and performance of silk fibroin fibers and silk fibroin 3D scaffolds were characterized by scanning electron microscopy, infrared spectroscopy, X-ray diffraction, a differential thermal scanner, a universal materials testing machine, and laser confocal microscopy, and the degradation performance was tested by protease degradation. The results showed that an excessive mass fraction of sodium carbonate would cause partial hydrolysis of fibroin fibers, decrease the mechanical properties of fibroin fiber, increase the surface roughness of fibroin fibers, and make mouse embryonic fibroblasts easier to adhere and grow. Silk fibroin fibers were slightly dissolved, shrunk, and dispersed in formic acid. The mass fraction of sodium carbonate can adjust the enzymatic degradation rate of the silk fibroin 3D scaffolds. With the extension of the degradation time, minerals will be deposited on the surface of the scaffolds. The results show that the silk fibroin 3D scaffolds have biocompatibility, mechanical properties, and degradability, which provides a good material for a barrier biofilm in the future.


Asunto(s)
Fibroínas/química , Ensayo de Materiales , Andamios del Tejido/química , Células 3T3 , Animales , Carbonatos , Supervivencia Celular , Cirugía Laser de Córnea , Análisis Diferencial Térmico , Ratones , Microscopía Electrónica de Rastreo , Péptido Hidrolasas/metabolismo , Espectrofotometría Infrarroja , Difracción de Rayos X
16.
Inflamm Res ; 69(7): 645-656, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32342116

RESUMEN

OBJECTIVE AND DESIGN: Nowadays, sepsis-induced acute kidney injury (AKI) has gradually become a global problem for its high incidence and increasing mortality. Previous study has reported lncRNA ENST00000452391.1 in sepsis patients. However, its potential biological function and downstream molecular mechanism are still mysterious. METHODS AND RESULTS: Our study found that it was upregulated in sepsis-induced AKI patients, so it was identified as "sepsis-induced kidney injury associated transcript 1 (SIKIAT1)". We used lipopolysaccharide (LPS) stimulated HK-2 cells as an in vitro model to demonstrated that SIKIAT1 acts as a ceRNA for miR-96-3p to enhance FOXA1 expression and promote HK-2 cell apoptosis. CONCLUSION: Therefore, it could be a potential biomarker and therapeutic target for sepsis-induced AKI in the development of disease.


Asunto(s)
Apoptosis/fisiología , Factor Nuclear 3-alfa del Hepatocito/fisiología , Enfermedades Renales/etiología , MicroARNs/fisiología , Sepsis/complicaciones , Línea Celular , Regulación de la Expresión Génica , Técnicas de Silenciamiento del Gen , Factor Nuclear 3-alfa del Hepatocito/genética , Humanos , Riñón/efectos de los fármacos , Riñón/metabolismo , Riñón/patología , Enfermedades Renales/patología , Lipopolisacáridos/farmacología , MicroARNs/genética , ARN Largo no Codificante/genética , ARN Largo no Codificante/fisiología , Sepsis/genética , Sepsis/patología , Transfección
17.
Artículo en Inglés | MEDLINE | ID: mdl-32235690

RESUMEN

Although potatoes are highly nutritious, many epidemiological studies have connected their consumption with abnormal lipids, diabetes, and hypertension. Steamed potato bread has recently become one of China's staple foods. A randomized controlled trial was designed to evaluate the effect of steamed potato bread consumption on Chinese adolescents. Four classes from a high school were randomly selected and assigned to the intervention group (two classes) or control group (two classes). The steamed wheat bread (100% raw wheat flour) and potato bread (raw wheat flour to cooked potato flour ratio of 3:7) were provided to the control group and intervention group as staple food once a school day for 8 weeks, respectively. Compared with the control group, the intervention group had significant net changes in systolic blood pressure (4.6 mmHg, p = 0.010), insulin (-4.35 mIU/L, p < 0.001), total cholesterol (-0.13 mmol/L, p = 0.032), and high-density lipoproteins cholesterol (-0.07 mmol/L, p = 0.010). The urinary level of Na+/K+ did not differ between the groups. In conclusion, the intake of steamed potato bread for 8 weeks resulted in positive effects on the total cholesterol and insulin profiles but a negative effect on the systolic blood pressure and high-density lipoproteins cholesterol of adolescents.


Asunto(s)
Pan , Harina , Potasio/orina , Sodio/orina , Solanum tuberosum , Triticum , Adolescente , Pueblo Asiatico , Glucemia , China , Femenino , Glucosa , Índice Glucémico , Humanos , Lípidos , Masculino
18.
Artículo en Inglés | MEDLINE | ID: mdl-32188025

RESUMEN

In the original version of our article [1], insufficient acknowledgement was given for the originsof some of the dish samples used [...].

19.
Orthod Craniofac Res ; 23(3): 332-341, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32202038

RESUMEN

OBJECTIVE: To investigate the morphological characteristics of the mandible in subjects with impacted mandibular second molars by measuring and analysing the mandible in three dimensions. SETTING AND SAMPLE POPULATION: In this retrospective study, the data of a total of 52 609 subjects who underwent cone-beam computed tomography (CBCT) for diagnosis and treatment were reviewed. According to the inclusion and exclusion criteria, 183 subjects with impacted mandibular second molars and 176 age- and sex-matched controls were included. METHODS: A retrospective case-control study was designed. The 183 subjects were divided into two groups: group 1 (G1) comprised 120 patients with unilaterally impacted mandibular second molars, and group 2 (G2) comprised 63 patients with bilaterally impacted mandibular second molars. Group 3 (G3) contained 176 age- and sex-matched controls. The mandible was reconstructed with nineteen landmarks using Mimics software. Twelve linear lengths and 3 angles were measured. RESULTS: The bilateral germination gap, mandibular body width and gonion width in G1 were significantly lower than those in G3 (P < .05), while the gnathion angle and first molar width values in G1 were significantly higher than those in G3 (P < .05). The results in G2 were similar to those in G1, but the differences between G2 and G3 were greater than those between G1 and G3. There were no significant differences in the other measurements among the groups. CONCLUSION: The mandibles of the subjects with impacted second molars were constricted in terms of the sagittal length and transverse width.


Asunto(s)
Diente Impactado , Estudios de Casos y Controles , Tomografía Computarizada de Haz Cónico , Humanos , Mandíbula , Diente Molar , Tercer Molar , Estudios Retrospectivos
20.
Int Wound J ; 17(3): 735-741, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32090497

RESUMEN

We investigated the molecular mechanism of paraoxonase-2 (PON-2) in regulating blood coagulation activation in rats with haemorrhagic shock through endothelial tissue factor (TF). Thirty adult Sprague Dawley rats were randomly divided into three groups: healthy control group (group A), the haemorrhagic shock PON-2 treatment group (group B), and the haemorrhagic shock group (group C). After the model was established, blood was withdrawn from the inferior vena cava of all rats. The difference in plasma thrombomodulin (TM) levels of the three groups was determined by Western blotting. The expression of transcription factors Egr-1 and Sp1 was detected by Western blotting assays. reverse transcription-polymerase chain Reaction (RT-PCR) was used to determine the mRNA expression of t-PA, PAI-1, TM, and PON-2 in the serum of three groups of rats. Endothelial TF was measured by enzyme linked immunosorbent assay (ELISA), and coagulation assay was used to detect the activity of coagulation factor VIII. Histopathological examination of the arteries of the rats was performed. The molecular mechanism of PON-2 in regulating blood coagulation activation in haemorrhagic shock model rats by endothelial tissue factor was analysed. The expression of thrombin was determined by electrophoresis. Compared with the healthy control group, the expression of TM in groups B and C decreased, both 188.64 ± 12.47 and 137.48 ± 9.72, respectively, with a significant difference. The mRNA expression of TM and PON was determined by RT-PCR. The mRNA expression of TM and PON in group B was 0.97 ± 0.07 and 1.14 ± 0.09, compared with the control group, and the mRNA expression of TM and PON in group C was 0.86 ± 0.38 and 1.12 ± 0.41, both of which increased, and there were significant differences. By measuring the expression of endothelial TF, the expression of TF in groups B and C was elevated to 12.69 ± 1.07 and 11.59 ± 0.87, with significant differences. The enzyme activities of PON-2 in groups B and C, which were 110.34 ± 14.37 and 52.37 ± 8.06, respectively, were increased compared with the healthy control group and there were significant differences. PON-2 regulates the activation of coagulation in rats with haemorrhagic shock by regulating the expression of endothelial tissue-related genes such as plasma TM and endothelial TF under hypoxic and ischaemic conditions.


Asunto(s)
Arildialquilfosfatasa/farmacología , Coagulación Sanguínea/efectos de los fármacos , Choque Hemorrágico/metabolismo , Trombomodulina/metabolismo , Animales , Modelos Animales de Enfermedad , Proteína 1 de la Respuesta de Crecimiento Precoz/metabolismo , Femenino , Masculino , ARN Mensajero/metabolismo , Ratas , Ratas Sprague-Dawley , Choque Hemorrágico/etiología , Factor de Transcripción Sp1/metabolismo , Trombomodulina/genética , Tromboplastina/metabolismo
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