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1.
Subst Abus ; 43(1): 892-900, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35192446

RESUMEN

Background: The opioid epidemic continues to erode communities across Pennsylvania (PA). Federal and PA state programs developed grants to establish Hub and Spoke programs for the expansion of medications for opioid use disorders (MOUD). Employing the telementoring platform Project ECHO (Extension for Community Health Outcomes), Penn State Health engaged the other seven grant awardees in a Collaborative Health Systems (CHS) ECHO. We conducted key informant interviews to better understand impact of the CHS ECHO on health systems collaboration and opioid crisis efforts. Methods: For eight one-hour sessions, each awardee presented their unique strategies, challenges, and opportunities. Using REDCap, program characteristics, such as number of waivered prescribers and number of patients served were collected at baseline. After completion of the sessions, key informant interviews were conducted to assess the impact of CHS ECHO on awardee's programs. Results: Analysis of key informant interviews revealed important themes to address opioid crisis efforts, including the need for strategic and proactive program reevaluation and the convenience of collaborative peer learning networks. Participants expressed benefits of the CHS ECHO including allowing space for discussion of challenges and best practices and facilitating conversation on collaborative targeted advocacy and systems-level improvements. Participants further reported bolstered motivation and confidence. Conclusions: Utilizing Project ECHO provided a bidirectional platform of learning and support that created important connections between institutions working to combat the opioid epidemic. CHS ECHO was a unique opportunity for productive and convenient peer learning across external partners. Open dialogue developed during CHS ECHO can continue to direct systems-levels improvements that benefit individual and population outcomes.


Asunto(s)
Buprenorfina , Administración Financiera , Analgésicos Opioides/uso terapéutico , Buprenorfina/uso terapéutico , Comunicación , Humanos , Pennsylvania , Atención Primaria de Salud
2.
Soft Matter ; 14(26): 5428-5441, 2018 Jul 04.
Artículo en Inglés | MEDLINE | ID: mdl-29947413

RESUMEN

We study the contact mechanics between 3 different tire tread compounds and a smooth glass surface in water. We study both adhesion and sliding friction at low-sliding speeds. For 2 of the compounds the rubber-glass contact in water is hydrophobic and we observe adhesion, and slip-stick sliding friction dynamics. For one compound the contact is hydrophilic, resulting in vanishing adhesion, and steady-state (or smooth) sliding dynamics. We also show the importance of dynamical scrape, both on the macroscopic level and at the asperity level, which reduces the water film thickness between the solids during slip. The experiments show that the fluid is removed much faster from the rubber-glass asperity contact regions for a hydrophobic contact than for a hydrophilic contact. We also study friction on sandblasted glass in water. In this case all the compounds behave similarly and we conclude that no dewetting occur in the asperity contact regions. We propose that this is due to the increased surface roughness which reduces the rubber-glass binding energy.

3.
Langenbecks Arch Surg ; 402(4): 591-598, 2017 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28365804

RESUMEN

BACKGROUND: This study aimed to demonstrate the noninferior efficacy of TachoSil vs. TachoComb in Japanese patients undergoing liver resection and to assess the safety of TachoSil vs. TachoComb in these patients. METHODS: This randomized, double-blind, noninferiority study (JapicCTI-090684) involved participants scheduled for liver resection/living donors (age ≥ 20 years). TachoSil or TachoComb (1:1 allocation ratio) was applied to control persistent exudative bleeding after primary hemostasis during liver resection/removal for donation. The primary outcome was hemostasis 5 min after study treatment application. The 95% confidence interval (CI) for the difference in the proportion of participants with hemostasis 5 min after application of TachoSil/TachoComb was determined; noninferiority of TachoSil was indicated if the lower limit of the CI was ≥-14%. Adverse events (AEs) were recorded. RESULTS: All participants in the efficacy analysis (TachoSil: 54/54, 100%; TachoComb: 54/54, 100%) achieved hemostasis 5 min after study treatment application. Therefore, TachoSil was noninferior to TachoComb. All participants experienced ≥1 AE; however, none discontinued because of an AE. Most (≥97.8%) AEs were mild or moderate in severity. CONCLUSIONS: These findings confirm the safety profile and noninferior hemostatic efficacy of TachoSil compared with TachoComb.


Asunto(s)
Aprotinina/uso terapéutico , Pérdida de Sangre Quirúrgica/prevención & control , Fibrinógeno/uso terapéutico , Hemostasis Quirúrgica , Hemostáticos/uso terapéutico , Hepatectomía/efectos adversos , Trombina/uso terapéutico , Anciano , Método Doble Ciego , Combinación de Medicamentos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Resultado del Tratamiento
4.
Phys Rev Lett ; 112(7): 071101, 2014 Feb 21.
Artículo en Inglés | MEDLINE | ID: mdl-24579585

RESUMEN

Ultracold neutrons (UCNs) can be bound by the potential of terrestrial gravity and a reflecting mirror. The wave function of the bound state has characteristic modulations. We carried out an experiment to observe the vertical distribution of the UCNs above such a mirror at the Institut Laue-Langevin in 2011. The observed modulation is in good agreement with that prediction by quantum mechanics using the Wigner function. The spatial resolution of the detector system is estimated to be 0.7 µm. This is the first observation of gravitationally bound states of UCNs with submicron spatial resolution.

5.
Prostaglandins Other Lipid Mediat ; 108: 23-30, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24614064

RESUMEN

Chronic airway diseases like COPD and asthma are usually accompanied with airway fibrosis. Myofibroblasts, which are characterized by expression of smooth muscle actin (α-SMA), play an important role in a variety of developmental and pathological processes, including fibrosis and wound healing. Sphingosylphosphorylcholine (SPC), a sphingolipid metabolite, has been implicated in many physiological and pathological conditions. The current study tested the hypothesis that SPC may modulate tissue remodeling by affecting the expression of α-SMA in human fetal lung fibroblast (HFL-1) and fibroblast mediated gel contraction. The results show that SPC stimulates α-SMA expression in HFL-1 and augments HFL-1 mediated collagen gel contraction in a time- and concentration-dependent manner. The α-SMA protein expression and fibroblast gel contraction induced by SPC was not blocked by TGF-ß1 neutralizing antibody. However, it was significantly blocked by S1P2 receptor antagonist JTE-013, the Rho-specific inhibitor C3 exoenzyme, and a Rho-kinase inhibitor Y-27632. These findings suggest that SPC stimulates α-SMA protein expression and HFL-1 mediated collagen gel contraction via S1P2 receptor and Rho/Rho kinase pathway, and by which mechanism, SPC may be involved in lung tissue remodeling.


Asunto(s)
Actinas/metabolismo , Fibroblastos/metabolismo , Fosforilcolina/análogos & derivados , Receptores de Lisoesfingolípidos/metabolismo , Esfingosina/análogos & derivados , Proteína de Unión al GTP rhoA/metabolismo , Actinas/genética , Remodelación de las Vías Aéreas (Respiratorias) , Células Cultivadas , Colágeno/metabolismo , Geles , Humanos , Pulmón/patología , Transducción de Señal , Esfingosina/fisiología , Receptores de Esfingosina-1-Fosfato , Activación Transcripcional , Factor de Crecimiento Transformador beta1/fisiología
6.
Gait Posture ; 112: 53-58, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38744021

RESUMEN

BACKGROUND: To evaluate whether the knee adduction moment (KAM) could be reduced by a short instruction in the Draw-in (DI) maneuver in healthy adults, and whether knee joint function would improve with a longer DI gait intervention in patients with knee osteoarthritis (OA). METHOD: In Study 1, healthy adults received 10 minutes supervised instruction in DI gait in and then practiced the gait independently for 10 minutes. Three-dimensional motion analysis measurement was performed in each phase. In Study 2, patients with OA performed a 20-minute DI gait intervention daily for 6 weeks. At baseline and after 6 weeks, knee pain, the Knee injury and Osteoarthritis Outcome Score, the MOS 8 item Short-Form Health Survey, thoracic kyphosis angle, knee joint range of motion, knee extension muscle strength, hip abduction muscle strength, and activity level were evaluated. RESULTS: In Study 1, the DI gait to decrease KAM could be learning following only 10 minutes of instruction and 10 minutes of self-practice in healthy adults. In Study 2, knee pain was reduced by 19 % and the thoracic kyphosis angle was reduced by 2.6° after 6 weeks. No significant changes in other parameters were detected, and the implementation rate was 86 ±â€¯14 %. SIGNIFICANCE: In healthy adults, DI gait instruction for 10 minutes of instruction and 10 minutes of self-practice reduced the KAM. In patients with knee OA, 20 minutes of DI gait per day for 6 weeks may reduce knee pain and thoracic kyphosis.


Asunto(s)
Marcha , Articulación de la Rodilla , Cifosis , Osteoartritis de la Rodilla , Rango del Movimiento Articular , Humanos , Osteoartritis de la Rodilla/fisiopatología , Osteoartritis de la Rodilla/rehabilitación , Masculino , Femenino , Cifosis/fisiopatología , Persona de Mediana Edad , Marcha/fisiología , Rango del Movimiento Articular/fisiología , Articulación de la Rodilla/fisiopatología , Adulto , Anciano , Fuerza Muscular/fisiología
7.
Nat Genet ; 26(2): 237-41, 2000 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-11017086

RESUMEN

Macular corneal dystrophy (MCD; MIM 217800) is an autosomal recessive hereditary disease in which progressive punctate opacities in the cornea result in bilateral loss of vision, eventually necessitating corneal transplantation. MCD is classified into two subtypes, type I and type II, defined by the respective absence and presence of sulphated keratan sulphate in the patient serum, although both types have clinically indistinguishable phenotypes. The gene responsible for MCD type I has been mapped to chromosome 16q22, and that responsible for MCD type II may involve the same locus. Here we identify a new carbohydrate sulphotransferase gene (CHST6), encoding an enzyme designated corneal N-acetylglucosamine-6-sulphotransferase (C-GlcNAc6ST), within the critical region of MCD type I. In MCD type I, we identified several mutations that may lead to inactivation of C-GlcNAc6ST within the coding region of CHST6. In MCD type II, we found large deletions and/or replacements caused by homologous recombination in the upstream region of CHST6. In situ hybridization analysis did not detect CHST6 transcripts in corneal epithelium in an MCD type II patient, suggesting that the mutations found in type II lead to loss of cornea-specific expression of CHST6.


Asunto(s)
Cromosomas Humanos Par 16 , Distrofias Hereditarias de la Córnea/genética , Mutación , Sulfotransferasas/genética , Secuencia de Aminoácidos , Secuencia de Bases , Mapeo Cromosómico , Distrofias Hereditarias de la Córnea/clasificación , Distrofias Hereditarias de la Córnea/enzimología , Etiquetas de Secuencia Expresada , Femenino , Marcadores Genéticos , Humanos , Sulfato de Queratano/sangre , Masculino , Datos de Secuencia Molecular , Linaje , Polimorfismo de Longitud del Fragmento de Restricción , Alineación de Secuencia , Homología de Secuencia de Aminoácido , Sulfotransferasas/química , Carbohidrato Sulfotransferasas
8.
Phys Rev Lett ; 108(4): 047001, 2012 Jan 27.
Artículo en Inglés | MEDLINE | ID: mdl-22400880

RESUMEN

We report a systematic study by (75)As nuclear-quadrupole resonance in LaFeAsO(1-x)F(x). The antiferromagnetic spin fluctuation found above the magnetic ordering temperature T(N) = 58 K for x = 0.03 persists in the regime 0.04 ≤ x ≤ 0.08, where superconductivity sets in. A dome-shaped x dependence of the superconducting transition temperature T(c) is found, with the highest T(c) = 27 K at x = 0.06, which is realized under significant antiferromagnetic spin fluctuation. With increasing x further, the antiferromagnetic spin fluctuation decreases, and so does T(c). These features resemble closely the cuprates La(2-x)Sr(x)CuO(4). In x = 0.06, the spin-lattice relaxation rate (1/T(1)) below T(c) decreases exponentially down to 0.13T(c), which unambiguously indicates that the energy gaps are fully opened. The temperature variation of 1/T(1) below T(c) is rendered nonexponential for other x by impurity scattering.

9.
Eur Respir J ; 35(3): 637-46, 2010 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19797126

RESUMEN

Pleiotropic effects of statins have been reported to include inhibition of matrix metalloproteinase (MMP) release from macrophages and endothelial cells. We evaluated whether statins would inhibit MMP release from human lung fibroblasts, which play a major role in remodelling processes. Monolayer and three-dimensional (3D) collagen gel cultures of fibroblasts were used. Cytokines (tumour necrosis factor-alpha and interleukin-1alpha) were used to induce MMP release and mRNA expression. Collagen degradation induced by cytokines and neutrophil elastase (NE) was evaluated by quantifying hydroxyproline. Atorvastatin inhibited MMP-1 and -3 release and mRNA expression in both culture systems. Similar results were obtained with simvastatin and fluvastatin. In 3D cultures where cytokines also stimulated MMP-9 release, atorvastatin also inhibited MMP-9 release. In 3D cultures, cytokines together with NE induced collagen degradation, which was also inhibited by atorvastatin. The effect of atorvastatin was reversed by mevalonate and geranylgeranyl-pyrophosphate but not by farnesyl-pyrophosphate. The current data suggest that statins may modulate remodelling processes mediated by fibroblasts by inhibiting MMP release.


Asunto(s)
Fibroblastos/efectos de los fármacos , Inhibidores de Hidroximetilglutaril-CoA Reductasas/farmacología , Metaloproteinasas de la Matriz/efectos de los fármacos , Alveolos Pulmonares/citología , Células Cultivadas , Humanos , Metaloproteinasas de la Matriz/genética , Metaloproteinasas de la Matriz/metabolismo , Alveolos Pulmonares/efectos de los fármacos , ARN Mensajero/metabolismo
10.
Br J Surg ; 97(7): 1062-9, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20632273

RESUMEN

BACKGROUND: Although patients with liver cirrhosis are supposed to tolerate ischaemia-reperfusion poorly, the exact impact of intermittent inflow clamping during hepatic resection of cirrhotic compared with normal liver remains unclear. METHODS: Intermittent Pringle's manoeuvre was applied during minor hepatectomy in 172 patients with a normal liver, 59 with chronic hepatitis and 97 with liver cirrhosis. To assess hepatic injury, delta (D)-aspartate aminotransferase (AST) and D-alanine aminotransferase (ALT) (maximum level minus preoperative level) were calculated. To evaluate postoperative liver function, postoperative levels of total bilirubin, albumin and cholinesterase (ChE), and prothrombin time were measured. RESULTS: Significant correlations between D-AST or D-ALT and clamping time were found in each group. The regression coefficients of the regression lines for D-AST and D-ALT in patients with normal liver were significantly higher than those in patients with cirrhotic liver. Irrespective of whether clamping time was 45 min or less, or at least 60 min, D-AST and D-ALT were significantly lower in patients with cirrhosis than in those with a normal liver. Parameters of hepatic functional reserve, such as total bilirubin, prothrombin time, albumin and ChE, were impaired significantly after surgery in patients with a cirrhotic liver. CONCLUSION: Patients with liver cirrhosis had a smaller increase in aminotransferase levels following portal triad clamping than those with a normal liver. However, hepatic functional reserve in those with a cirrhotic liver seemed to be affected more after intermittent inflow occlusion.


Asunto(s)
Cirrosis Hepática/cirugía , Daño por Reperfusión/etiología , Adulto , Anciano , Anciano de 80 o más Años , Alanina Transaminasa/metabolismo , Albúminas/metabolismo , Análisis de Varianza , Aspartato Aminotransferasas/metabolismo , Bilirrubina/metabolismo , Colinesterasas/metabolismo , Femenino , Hepatectomía , Hepatitis Crónica/metabolismo , Hepatitis Crónica/fisiopatología , Hepatitis Crónica/cirugía , Humanos , Cirrosis Hepática/metabolismo , Cirrosis Hepática/fisiopatología , Neoplasias Hepáticas/metabolismo , Neoplasias Hepáticas/fisiopatología , Neoplasias Hepáticas/cirugía , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias/etiología , Tiempo de Protrombina , Factores de Tiempo
11.
Theor Appl Genet ; 120(7): 1335-46, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-20069415

RESUMEN

To perform comparative studies of CR (clubroot resistance) loci in Brassica oleracea and Brassica rapa and to develop marker-assisted selection in B. oleracea, we constructed a B. oleracea map, including specific markers linked to CR genes of B. rapa. We also analyzed CR-QTLs using the mean phenotypes of F(3) progenies from the cross of a resistant double-haploid line (Anju) with a susceptible double-haploid line (GC). In the nine linkage groups obtained (O1-O9), the major QTL, pb-Bo(Anju)1, was derived from Anju with a maximum LOD score (13.7) in O2. The QTL (LOD 5.1) located in O5, pb-Bo(GC)1, was derived from the susceptible GC. Other QTLs with smaller effects were found in O2, O3, and O7. Based on common markers, it was possible to compare our finding CR-QTLs with the B. oleracea CR loci reported by previous authors; pb-Bo(GC)1 may be identical to the CR-QTL reported previously or a different member contained in the same CR gene cluster. In total, the markers linked to seven B. rapa CR genes were mapped on the B. oleracea map. Based on the mapping position and markers of the CR genes, informative comparative studies of CR loci between B. oleracea and B. rapa were performed. Our map discloses specific primer sequences linked to CR genes and includes public SSR markers that will promote pyramiding CR genes in intra- and inter-specific crosses in Brassica crops. Five genes involved in glucosinolates biosynthesis were also mapped, and GSL-BoELONG and GSL-BoPro were found to be linked to the pb-Bo(Anju)1 and Bo(GC)1 loci, respectively. The linkage drag associated with the CR-QTLs is briefly discussed.


Asunto(s)
Brassica/genética , Brassica/parasitología , Genes de Plantas/genética , Inmunidad Innata/genética , Enfermedades de las Plantas/inmunología , Enfermedades de las Plantas/parasitología , Sitios de Carácter Cuantitativo/genética , Brassica/inmunología , Mapeo Cromosómico , Segregación Cromosómica/genética , Cromosomas de las Plantas/genética , Cruzamientos Genéticos , Sitios Genéticos/genética , Marcadores Genéticos , Enfermedades de las Plantas/genética
12.
J Nanosci Nanotechnol ; 10(6): 3994-7, 2010 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-20355404

RESUMEN

This paper reports the structural properties of the high-pressure and high-temperature (HPHT) treated double-walled carbon nanotubes (DWCNTs) based on Raman, XRD and TEM experiments. It was found that the DWCNTs are more stable toward HPHT treatment than the single-walled carbon nanotubes (SWCNTs). We propose that this is probably because the DWCNTs tend not to be deformed by compression and thereby they are less reactive under pressure compared to SWCNTs.

13.
J Nanosci Nanotechnol ; 10(6): 4089-94, 2010 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-20355420

RESUMEN

Surface functionalization of single wall carbon nanotubes (SWCNTs) is carried out by chemical and electrochemical oxidation in aqueous medium. Treatment of SWCNT in acid mixtures results oxygenated surface with mainly micro porous texture which shows a pseudocapacitance of 209 Fg(-1) in 1 M H2SO4 solution at a current rate of 50 mAg(-1). The SWCNT surface become slightly non-polar when treated with fuming HNO3 even in the presence of oxygenated species. Under a current rate of 50 mAg(-1), a maximum capacitance of 202 Fg(-1) is observed in 1 M Et3MeNBF4 in polycarbonate due to presence of mesopores. Electrochemical oxidation in KNO2 functionalizes the SWCNT surface with NO2 species which shows intermediate pseudocapacitance facilitating probably organization of only smaller ions along the walls of mesopores of SWCNT. The mixed acid treated SWCNTs exhibit sensibly larger capacitance of 160 Fg(-1) even at higher current rate of 5000 mAg(-1).

14.
Lett Appl Microbiol ; 49(1): 136-41, 2009 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-19413761

RESUMEN

AIMS: To investigate hydrogen peroxide production by lactic acid bacteria (LAB) and to determine the key factors involved. METHODS AND RESULTS: Six strains of Weissella cibaria produced large amounts (2.2-3.2 mmol l(-1)) of hydrogen peroxide in GYP broth supplemented with sodium acetate, but very low accumulations in glucose yeast peptone broth without sodium acetate. Increased production of hydrogen peroxide was also recorded when strains of W. cibaria were cultured in the presence of potassium acetate, sodium isocitrate and sodium citrate. Oxidases and peroxidases were not detected, or were present at low levels in W. cibaria. However, strong nicotinamide adenine dinucleotide (NADH) oxidase activity was recorded, suggesting that the enzyme plays a key role in production of hydrogen peroxide by W. cibaria. CONCLUSIONS: Weissella cibaria produces large quantities of hydrogen peroxide in aerated cultures, in a process that is dependent on the presence of acetate in the culture medium. NADH oxidase is likely the key enzyme in this process. SIGNIFICANCE AND IMPACT OF THE STUDY: This is the first study showing that sodium acetate, normally present in culture media of LAB, is a key factor for hydrogen peroxide production by W. cibaria. The exact mechanisms involved are not known.


Asunto(s)
Bacterias Grampositivas/metabolismo , Peróxido de Hidrógeno/metabolismo , Acetato de Sodio/metabolismo , Aerobiosis , Citratos/metabolismo , Medios de Cultivo/química , Complejos Multienzimáticos/metabolismo , NADH NADPH Oxidorreductasas/metabolismo , Acetato de Potasio/metabolismo , Citrato de Sodio
15.
Kyobu Geka ; 62(6): 500-3, 2009 Jun.
Artículo en Japonés | MEDLINE | ID: mdl-19522214

RESUMEN

We report a 27-year-old woman who underwent off-pump coronary artery bypass grafting (OPCAB) for angina pectoris with coronary artery aneurysm due to Kawasaki disease. At the age of 3, she was diagnosed as Kawasaki disease with coronary artery aneurysms in the right coronary artery and the left anterior descending artery. She was medically followed-up since then Because an enlarged aneurysm and a stenotic lesion were recognized in the right coronary artery, operation was indicated. In operation, the right coronary artery was ligated at the inflow and the outflow of the aneurysm. OPCAB was also conducted with the right internal thoracic artery anastomosed to the right coronary artery. Postoperative course was uneventful, and she was discharged at the day 5 after operation. Revascularization using arterial grafts, especially the internal thoracic arteries, may be the choice for young patients to expect a good patency rate in the long-term.


Asunto(s)
Angina de Pecho/etiología , Angina de Pecho/cirugía , Puente de Arteria Coronaria Off-Pump , Puente de Arteria Coronaria , Síndrome Mucocutáneo Linfonodular/complicaciones , Adulto , Anastomosis Quirúrgica , Aneurisma Coronario/etiología , Aneurisma Coronario/cirugía , Vasos Coronarios/cirugía , Femenino , Humanos , Arterias Mamarias/cirugía
16.
Kyobu Geka ; 62(1): 19-23, 2009 Jan.
Artículo en Japonés | MEDLINE | ID: mdl-19195181

RESUMEN

We report the clinical results of 799 cases of isolated coronary artery bypass grafting (CABG) performed during the recent 5 years. We performed off-pump CABG (OPCAB) as standard operation, in which arterial grafts were mainly used. The mean number of distal anastomoses was 3.6 +/- 1.4 per patient Four hundred and fifty-five cases (57.0%) were done only with arterial grafts. Bilateral internal thoracic arteries were used in 326 cases. The mean number of saphenous vein grafts was 1.6 +/- 0.8 per patient. Continuous hemodiafiltraion (CHDF) was performed in 22 cases (2.8%) postoperatively. Among the OPCAB cases, 10 cases (1.3%) were converted to on-pump CABG. There were 7 cases (0.9%) of hospital death. The mean length of postoperative hospital stay was 10.2 +/- 5.3 days. The ratio of the patients with left main trunk disease and that of the patients who required postoperative CHDF increased year by year. The mean length of postoperative hospital stay decreased every year, and the reduced length was 2.7 days in the 5 years (8.7+/- 3.6 days in 2007). It is expected that patients who have severe calcified lesions or who are on hemodialysis may increase in the near future. In such cases, CABG rather than percutaneous catheter intervention may be suitable for revascularization. Therefore, not only appropriate choice of treatment strategies, but also accurate surgical techniques may become more importance.


Asunto(s)
Puente de Arteria Coronaria Off-Pump/métodos , Anciano , Puente de Arteria Coronaria , Femenino , Humanos , Masculino , Resultado del Tratamiento
17.
Am J Transplant ; 8(1): 170-4, 2008 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-18021282

RESUMEN

In adult-to-adult living donor liver transplantation (LDLT), left-lobe grafts can sometimes be small-for-size. Although attempts have been made to prevent graft overperfusion through modulation of portal inflow, the optimal portal venous circulation for a liver graft is still unclear. Hepatic hemodynamics were analyzed with reference to graft function and outcome in 19 consecutive adult-to-adult LDLTs using left-lobe grafts without modulation of graft portal inflow. Overall mean graft volume (GV) was 398 g, which was equivalent to 37.8% of the recipient standard liver volume (SV). The GV/SV ratio was less than 40% in 13 of the 19 recipients. Overall mean recipient portal vein flow (PVF) was much higher than the left PVF in the donors. The mean portal contribution to the graft was markedly increased to 89%. Average daily volume of ascites revealed a significant correlation with portal vein pressure, and not with PVF. When PVP exceeds 25 mmHg after transplantation, modulation of portal inflow might be required in order to improve the early postoperative outcome. Although the study population was small and contained several patients suffering from tumors or metabolic disease, all 19 patients made good progress and the 1-year graft and patient survival rate were 100%. A GV/SV ratio of less than 40% or PVF of more than 260 mL/min/100 g graft weight does not contraindicate transplantation, nor is it necessarily associated with a poor outcome. Left-lobe graft LDLT is still an important treatment option for adult patients.


Asunto(s)
Circulación Hepática/fisiología , Trasplante de Hígado , Hígado/cirugía , Donadores Vivos , Vena Porta/cirugía , Adulto , Anciano , Femenino , Hemodinámica , Venas Hepáticas/cirugía , Humanos , Hígado/irrigación sanguínea , Masculino , Persona de Mediana Edad , Presión Portal/fisiología
18.
Mol Cell Biol ; 1(11): 1038-47, 1981 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-6180295

RESUMEN

Sodium butyrate (3 mM) inhibited the entry into the S phase of quiescent 3T3 cells stimulated by serum, but had no effect on the accumulation of cellular ribonucleic acid. Simian virus 40 infection or manual microinjection of cloned fragments from the simian virus 40 A gene caused quiescent 3T3 cells to enter the S phase even in the presence of butyrate. NGI cells, a line of 3T3 cells transformed by simian virus 40, grew vigorously in 3 mM butyrate. Homokaryons were formed between G1 and S-phase 3T3 cells, Butyrate inhibited the induction of deoxyribonucleic acid synthesis that usually occurs in B1 nuclei when G1 cells are fused with S-phase cells. However, when G1 3T3 cells were fused with exponentially growing NGI cells, the 3T3 nuclei were induced to enter deoxyribonucleic acid synthesis. In tsAF8 cells, a ribonucleic acid polymerase II mutant that stops in the G1 phase of the cell cycle, no temporal sequence was demonstrated between the butyrate block and the temperature-sensitive block. These results confirm previous reports that certain virally coded proteins can induce cell deoxyribonucleic acid synthesis in the absence of cellular functions that are required by serum-stimulated cells. Our interpretation of these data is that butyrate inhibited cell growth by inhibiting the expression of genes required for the G0 leads to G1 leads to S transition and that the product of the simian virus 40 A gene overrode this inhibition by providing all of the necessary functions for the entry into the S phase.


Asunto(s)
Butiratos/farmacología , ADN Viral/metabolismo , ADN/biosíntesis , Virus 40 de los Simios/genética , Animales , Bovinos/sangre , Ciclo Celular/efectos de los fármacos , Transformación Celular Viral , Células Cultivadas , ADN Recombinante , Células Híbridas , Ratones , Ratones Endogámicos , Mutación , ARN/biosíntesis , Temperatura
19.
Nat Biotechnol ; 19(5): 466-9, 2001 May.
Artículo en Inglés | MEDLINE | ID: mdl-11329018

RESUMEN

One of the widest ranging abiotic stresses in world agriculture arises from low iron (Fe) availability due to high soil pH, with 30% of arable land too alkaline for optimal crop production. Rice is especially susceptible to low iron supply, whereas other graminaceous crops such as barley are not. A barley genomic DNA fragment containing two naat genes, which encode crucial enzymes involved in the biosynthesis of phytosiderophores, was introduced into rice using Agrobacterium-mediated transformation and pBIGRZ1. Phytosiderophores are natural iron chelators that graminaceous plants secrete from their roots to solubilize iron in the soil. The two transgenes were expressed in response to low iron nutritional status in both the shoots and roots of rice transformants. Transgenic rice expressing the two genes showed a higher nicotianamine aminotransferase activity and secreted larger amounts of phytosiderophores than nontransformants under iron-deficient conditions. Consequently, the transgenic rice showed an enhanced tolerance to low iron availability and had 4.1 times greater grain yields than that of the nontransformant rice in an alkaline soil.


Asunto(s)
Hordeum/genética , Hierro/metabolismo , Oryza/genética , Proteínas de Plantas/genética , Transaminasas/genética , Técnicas de Transferencia de Gen , Vectores Genéticos , Hordeum/enzimología , Concentración de Iones de Hidrógeno , Hierro/química , Quelantes del Hierro/química , Quelantes del Hierro/metabolismo , Deficiencias de Hierro , Isoenzimas/genética , Isoenzimas/aislamiento & purificación , Isoenzimas/metabolismo , Oryza/enzimología , Oryza/crecimiento & desarrollo , Raíces de Plantas/química , Raíces de Plantas/genética , Brotes de la Planta/química , Brotes de la Planta/genética , Plantas Modificadas Genéticamente/enzimología , Plantas Modificadas Genéticamente/genética , Proteínas Recombinantes/biosíntesis , Rhizobium/enzimología , Rhizobium/genética , Sideróforos/biosíntesis , Suelo/análisis
20.
Nat Commun ; 8(1): 1267, 2017 11 02.
Artículo en Inglés | MEDLINE | ID: mdl-29097672

RESUMEN

Superconductivity appears in the cuprates when a spin order is destroyed, while the role of charge is less known. Recently, charge density wave (CDW) was found below the superconducting dome in YBa2Cu3O y when a high magnetic field is applied perpendicular to the CuO2 plane, which was suggested to arise from incipient CDW in the vortex cores that becomes overlapped. Here by 63Cu-nuclear magnetic resonance, we report the discovery of CDW induced by an in-plane field, setting in above the dome in single-layered Bi2Sr2-x La x CuO6. The onset temperature T CDW takes over the antiferromagnetic order temperature T N beyond a critical doping level at which superconductivity starts to emerge, and scales with the pseudogap temperature T*. These results provide important insights into the relationship between spin order, CDW and the pseudogap, and their connections to high-temperature superconductivity.

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