Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 19 de 19
Filtrar
1.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-879118

RESUMEN

Traditional Chinese medicine(TCM) is an important feature of cancer treatment in China. The methods to tap the advantages of TCM, reasonably evaluate and accurately apply Chinese patent medicines have become current research hotspots and difficulties. TCM takes syndrome differentiation and treatment as the core, with the characteristics of overall regulation and multi-targets efficacy. Therefore, the post-marketing survival benefit evaluation of Chinese patent medicines for cancer is different from that in modern medicine. The primary treatment goals in cancer patients include to improve the disease control rate and prolong their survival time. At present, Chinese patent medicines for cancer patients are lacking indepth studies on survival benefit at the post-marketing stage. In addition, the characteristics of individualized treatment with TCM have also increased the complexity of clinical research on TCM. Therefore, it is of certain practical significance and necessity to evaluate the survival benefit of Chinese patent medicines for cancer after marketing. Based on this, in this paper, we first summarized the technical methodological means of survival benefit evaluation at this stage, and then explored the post-marketing survival benefit evaluation of Chinese patent medicines for cancer from three aspects: the evaluation of cancer treatment effect based on survival time and quality of life, treatment-related toxicity and the auxiliary effect of TCM, and the improvement effect for tumor-related symptoms. Based on the practices of early clinical researches, and according to the insufficient efficacy evaluation of current clinical research on Chinese patent medicines, this paper proposed to improve the evaluation system for clinical researches on Chinese patent medicines, establish the evaluation method with TCM characteristics, clarify the dominant population, lay a theoretical foundation for the evaluation of post-marketing survival benefits of Chinese patent medicines for cancer in the future, and promote the modernization process of TCM.


Asunto(s)
Humanos , China , Medicamentos Herbarios Chinos/uso terapéutico , Mercadotecnía , Medicina Tradicional China , Neoplasias/tratamiento farmacológico , Medicamentos sin Prescripción/uso terapéutico , Calidad de Vida
2.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-941972

RESUMEN

OBJECTIVE@#To evaluate the effect of bone defect regeneration and the periodontal status of the second molars after mandibular third molars extraction using β-tertiary calcium phosphate (β-TCP) in the test side compared with the spontaneously healed side. To the bone defect of mandibular second molars as a result of surgical removal of impacted mandibular third molars is a common phenomenon, many research shows that the mandibular second molars alveolar bone regeneration was about 1.5 mm and the periodontal pocket >7 mm was greater than 43.3% after mandibular third molars extraction. There has been significant progress researches in the repair of bone defect after the third molar removal, and bone graft filling was one of the effective methods. The bone graft substitutes include autogenous bone, allograft bone, xenograft bone and synthetic bone.@*METHODS@#A split mouth, randomized clinical study was designed. Fifteen patients with mandibular third molars in the same jaw planned to be extracted were enrolled in the study. One of the sockets of each patient was randomly selected and filled with easy-graftTMCLASSIC (test group). The contralateral socket was left to heal spontaneously (control group). cone beam computed tomography (CBCT) scans were performed the day after the extraction and after 6 months. The horizontal dimensional changes of the sockets were recorded. The newly formed bone volume in the bone was analyzed by CBCT, and the probing depth (PD) was recorded. Student's t test was used to evaluate the difference between the two groups for each parameter, and the P value lower than 0.05 was considered to be statistically significant.@*RESULTS@#Fifteen patients (30 sockets) completed the flow-up, and all the 30 sockets healed uneventfully. After 6 months' healing, the new bone volume fraction of the test group was 63.3%±2.2%, while the new bone volume fraction of the control group was 50.1%±1.9%. The vertical dimensional increment of the test group was (5.53±0.39) mm, while the vertical change of the control group was (1.53±0.27) mm. The distal buccal site PD of the second molar was (3.0±0.7) mm in the test group, and (6.5±0.8) mm in the control group. Statistically significant differences were detected between the two groups.@*CONCLUSION@#The randomized controlled clinical trial showed that the application of β-TCP for bone defect repair after the mandibular third molars extraction resulted in more vertical bone regeneration and less probing depth when compared with what was spontaneously healed.


Asunto(s)
Humanos , Fosfatos de Calcio , Mandíbula , Diente Molar , Tercer Molar , Extracción Dental , Diente Impactado
3.
Mitochondrial DNA B Resour ; 4(2): 3569-3570, 2019 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-33366089

RESUMEN

In this paper, we obtained and characterized the complete chloroplast genome sequence of a unique moth orchid, Phalaenopsis lowii. The total plastid genome size is 146,834 bp, containing a large single copy (LSC) region (84,469 bp) and a small single-copy region (10,477 bp) that were separated by two inverted repeats (IRs) regions (25,944 bp). We annotated 110 unique genes, within which there are 76 protein-coding genes, 30 tRNA genes, and 4 rRNA genes. Phylogenetic analysis indicated the P. lowii showed a sister relationship with subgenus Phalaenopsis clade.

4.
Mitochondrial DNA B Resour ; 4(2): 3606-3607, 2019 Oct 16.
Artículo en Inglés | MEDLINE | ID: mdl-33366105

RESUMEN

Phalaenopsis cornu-cervi is a taxonomically and horticulturally important moth orchid. In this study, we report and characterize the complete plastid genome sequence of P. cornu-cervi for the first genomic resources in section Polychilos. Its complete plastome is 147,241 bp in length and contains two inverted repeat (IR) regions of 25,005bp, a large single-copy (LSC) region of 85,714 bp, and a small single-copy (SSC) region of 11,517 bp. The plastome contains 110 genes, consisting of 76 unique protein-coding genes, 30 unique tRNA genes, and 4 unique rRNA genes. It also shows the typical characteristics of Phalaenopsis chloroplast genome, while all ndh genes are non-functional. The complete plastome sequence of P. cornu-cervi will provide a useful resource for future phylogenetic study of Phalaenopsis and its garden utilization.

5.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-790841

RESUMEN

Objective To analyze the regularity and characteristics of 2621 cases of adverse drug reaction (ADR) occur-ring in our hospital during 2013-2016 ,and to explore the factors and causes of ADRs ,so as to provide evidence for the contin-uous improvement of rational use of drugs .Methods 2621 cases of ADR reports were retrospectively analyzed by monitoring software to extract ADR report source ,patient age and sex ,related pharmaceutical dosage forms ,routes of administration , clinical characterization ,organ involvement and other information .The Pareto method was used to identify the main drugs that caused ADR and ADR factorial analysis was performed with Fishbone diagram .Results ADR mainly reported by physicians (2573 cases ,98 .17% ) and pharmacists reported at least (3 cases ,0 .11% );population aged >70 years accounted for the lar-gest proportion (570 cases ,21 .74% );ADR mainly caused by intravenous infusion (1680 cases ,64 .10% ) .The clinical mani-festations were gastrointestinal system lesions (717 cases ,24 .17% ) .Pareto analysis showed that the main drug factors in-volved anti-infective drugs ,anti-neoplastic drugs ,Chinese medicine injections and parenteral nutrition drugs .Fishbone analysis showed that elderly patients ,intravenous administration ,incomplete monitoring and related drugs were the determining factors associated with ARDs .Conclusion The close attention should be paid to monitoring and guidance of special populations ,espe-cially the elderly ;reducing intravenous forms ,monitoring the main factors of medicines ,carrying out the individualized medica-tion monitoring ,strengthening clinical pharmacy ,in order to promote clinical rational use drug and reduce the occurrence of drug-induced diseases .

6.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-613555

RESUMEN

Objective To explore the effect of electroacupuncture intervention on tumor growth and PCNA expression in HepG2 nude mice.Methods Thirty-two nude mice were randomized to electroacupuncture, electrostimulation, model and blank control groups, 8 mice each. A nude mouse model of subcutaneous tumor was made with HepG2. The electroacupuncture group received electroacupuncture at points Zusanli and Sanyinjiao on bilateral lower limbs and the electrostimulation group, direct electrical stimulation of the same points. The tumor volume, the tumor/weight ratio and the tumor growth inhibition rate were observed. PCNA expression in the tumor tissue was determined.Results There was no statistically significant pre-/post-intervention difference in the tumor volume in the electroacupuncture, electrostimulation and model groups (P>0.05). There was no statistically significant post-intervention difference in the tumor volume between the electroacupuncture or electrostimulation group and the model group (P>0.05), but tumor growth tended to slow in the electroacupuncture group. There was no statistically significant pre-/post-intervention difference in the nude mouse weight in every group (P>0.05). There was a statistically significant post-intervention difference in the tumor/weight ratio between the electroacupuncture group and the electrostimulation or model group (P0.05). There was a statistically significantpost-intervention difference in the tumor growth inhibition rate between the electroacupuncture and electrostimulation groups (P0.05).Conclusion Electroacupuncture can delay HepG2 tumor growth to a certain extent.

7.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-463890

RESUMEN

Objective To explore extracellular signal-regulated kinase ( ERK1/2 ) expression in the role of curcumin inhibited staurosporine (STS)-mediated neurons toxic injury through added PD098059, and to clarify ERK1/2 mediated inhibitory role of curcumin on STS-induced neurons toxic injury.Methods The neurons toxic injury model of primary cultured hippocampal neurons was established by STS.The experiment was divided into six groups:normal control group, STS model group, PD098059 +STS model group, curcumin +STS pretreatment group, curcumin+PD098059+STS treatment group and curcumin treatment group.The cell viability were determined by MTT method, lactate dehydrogenase (LDH) release rate, cell toxicity were detected, nuclear shape were observed by DAPI staining, and ERK1/2 expression were detected by Western blot method.Results The cell viability of curcumin +STS pretreatment group was significantly higher than STS model group ( P <0.001 ); the cell viability had no significant difference between PD098059 +STS model group and curcumin +PD098059 +STS treatment group;compared with curcumin +STS model group , the cell viability of curcumin +PD098059 +STS treatment group was significantly decreased ( P<0.001 ).LDH results showed that the nerve cell toxicity of curcumin +STS pretreatment group was obviously less than STS model group (P<0.001).The cell nuclear shape showed typical apoptosis morphological characteristics in STS model group, and curcumin inhibited the effect of STS mediated-neuronal apoptosis.ERK1/2 protein expression in curcumin +STS pretreatment group significantly increased compared with STS model group ( P <0.001 ) .Conclusion Curcumin inhibited STS-mediated neurons toxicity injury by up-regulating ERK1/2 expression.After PD098059 blocking the nerve cells ERK1/2 synthesis, the inhibitory action of curcumin failed to implemented, which illustrated that ERK1/2 mediated curcumin to inhibit STS-induced neuronal toxic injury.

8.
Chinese Journal of Virology ; (6): 646-650, 2013.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-356653

RESUMEN

The constant outbreaks of influenza in a global scale have aroused great concern all over the world. Vaccine has been the most effective and economic means against influenza. However, the broad tropism and high mutation of influenza viruses have limited the effectiveness of influenza vaccines. Current influenza virus vaccines provide effective protection against virus strains that are identical or highly similar to the vaccine strain. Once a highly mutated or new strain of influenza virus appears, the current vaccine would lose its effectiveness. Therefore, the development of a universal vaccine against highly mutated or new influenza virus subtypes has become a hot spot in the field of influenza vaccine research. The major methods of developing the universal influenza vaccine are to select a conserved protein of influenza virus as an antigen. At least three universal influenza vaccines have been tested in clinical trials. Moreover, changing the routes of vaccine immunization and immunization schemes could also improve the effect of heterosubtypic immunity. This review summarized the research progresses of universal influenza vaccines and provided our prospective on universal influenza vaccine research.


Asunto(s)
Animales , Humanos , Investigación Biomédica , Vacunas contra la Influenza , Genética , Alergia e Inmunología , Gripe Humana , Alergia e Inmunología , Virología , Orthomyxoviridae , Genética , Alergia e Inmunología , Proteínas Virales , Genética , Alergia e Inmunología
9.
Mol Plant ; 5(5): 1029-41, 2012 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-22311778

RESUMEN

It remains unknown whether a sucrose transporter mediates sugar signaling. Here, we report that the Arabidopsis (Arabidopsis thaliana) sucrose transporter SUT4 interacts with five members of the Arabidopsis cytochrome b5 (Cyb5) family, and sucrose represses the interaction between SUT4 and a Cyb5 member Cyb5-2/A. We observed that down-regulation of SUT4 and three cytochrome b5 members (Cyb5-2, Cyb5-4, and Cyb5-6) confers the sucrose- and glucose-insensitive phenotypes in the sucrose/glucose-induced inhibition of seed germination. The sut4 cyb5-2 double mutant displays slightly stronger sucrose/glucose-insensitive phenotypes than either the sut4 or cyb5-2 single mutant. We showed that the SUT4/Cyb5-2-mediated signaling in the sucrose/glucose-induced inhibition of seed germination does not require ABA or the currently known ABI2/ABI4/ABI5-mediated signaling pathway(s). These data provide evidence that the sucrose transporter SUT4 interacts with Cyb5 to positively mediate sucrose and glucose signaling in the sucrose/glucose-induced inhibition of seed germination.


Asunto(s)
Proteínas de Arabidopsis/metabolismo , Arabidopsis/metabolismo , Citocromos b5/metabolismo , Germinación , Glucosa/metabolismo , Proteínas de Transporte de Membrana/metabolismo , Semillas/crecimiento & desarrollo , Sacarosa/metabolismo , Ácido Abscísico/metabolismo , Arabidopsis/genética , Arabidopsis/crecimiento & desarrollo , Proteínas de Arabidopsis/genética , Citocromos b5/genética , Regulación del Desarrollo de la Expresión Génica , Proteínas de Transporte de Membrana/genética , Datos de Secuencia Molecular , Unión Proteica , Semillas/genética , Semillas/metabolismo , Transducción de Señal
10.
Arthroscopy ; 27(6): 825-33, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21624677

RESUMEN

PURPOSE: To investigate the effect of graft length within the bone tunnel on tendon-bone healing at an early stage after anterior cruciate ligament (ACL) reconstruction using Achilles tendon autograft in a canine model. METHODS: We divided 40 adult dogs into 4 groups (n = 10 per group). Each dog underwent ACL reconstruction with Achilles tendon autograft in both knees. In groups I, II, III, and IV, the graft length within the tibia tunnel was 5 mm, 10 mm, 15 mm, and 20 mm, respectively. Five dogs in each group were killed 6 and 12 weeks postoperatively, with 3 knees used for histologic observation and 7 knees for mechanical testing. RESULTS: Six weeks after surgery, the histologic scores in group I were lower than those in the other groups (P < .01) and those in group II were lower than those in group III and group IV (P < .01). However, there was no difference between group III and group IV (P > .05). At 12 weeks, there were no significant differences in histologic scores between groups (P > .05). The biomechanical test at 6 weeks showed that the mean graft pullout strength improved from group I to group IV. Except between groups III and IV (P = .142), there was a significant difference in the pullout strength among other groups. At week 12, the failure points were in the midsubstance of most specimens and more tibial-side graft pullout was found in group I than in the other groups (P < .001). CONCLUSIONS: The histologic maturity and biomechanical strength of the tendon-bone junction after ACL reconstruction in dogs will be delayed at an early stage if the graft length in the bone tunnel is less than 15 mm. CLINICAL RELEVANCE: There is a minimal acceptable amount of intratunnel tendon graft to allow satisfactory early tendon-bone healing, and attempts to save tendon graft length that lower the amount of intratunnel graft below a minimum of 15 mm should be avoided.


Asunto(s)
Reconstrucción del Ligamento Cruzado Anterior/métodos , Ligamento Cruzado Anterior/cirugía , Tendones/trasplante , Tibia/cirugía , Animales , Ligamento Cruzado Anterior/fisiopatología , Lesiones del Ligamento Cruzado Anterior , Fenómenos Biomecánicos , Modelos Animales de Enfermedad , Perros , Estudios de Seguimiento , Traumatismos de la Rodilla/cirugía , Tendones/anatomía & histología , Trasplante Autólogo , Cicatrización de Heridas
11.
Injury ; 42(10): 1116-20, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21345433

RESUMEN

PURPOSE: To evaluate the effectiveness and safety of a new double fixation technique for displaced patellar fractures using bioabsorbable cannulated lag screws and braided polyester suture tension bands. METHODS: Fifteen patients (mean age of 46.2 years) with displaced transverse or comminuted patella fractures were enrolled in this prospective study. All of the patients were treated via the open reduction internal fixation (ORIF) procedure using bioabsorbable cannulated lag screws and braided polyester suture tension bands. The patients were followed post-surgery to evaluate (1) the time required for radiographic bone union, (2) the knee joint range of motion at the time of radiographic bone union, (3) the degree of pain assessed using the visual analogue scale (VAS), (4) the function of the knee using the Lysholm score and (5) the presence of any additional complications from the surgery. RESULTS: All of the patients were followed post-treatment for more than 1 year (range, 12-19 months; mean post-treatment follow up time, 14 months). The bone union of the fractures as seen radiographically occurred approximately 3 months from surgery in all cases without implant failure or redisplacement of the fractured site. The mean knee joint range of motion was from 0 to 134.6°, and the mean VAS score was 0.7 at the time of bone union. The mean Lysholm scores at the time of bone union and 12 months post-surgery were 86.7 and 95.7, respectively. No postoperative complications, such as infection, dislocation or breakage of the implants, were observed. Moreover, all of the patients returned to their previous activity level. CONCLUSION: This new double fixation technique using bioabsorbable cannulated lag screws and braided polyester suture tension bands resulted in satisfactory outcomes for patella fractures without any obvious complications.


Asunto(s)
Implantes Absorbibles , Tornillos Óseos , Fijación Interna de Fracturas/métodos , Fracturas Conminutas/cirugía , Rótula/cirugía , Suturas , Adulto , Anciano , Femenino , Fijación Interna de Fracturas/instrumentación , Curación de Fractura/fisiología , Humanos , Articulación de la Rodilla/fisiopatología , Masculino , Persona de Mediana Edad , Dolor Postoperatorio , Rótula/lesiones , Poliésteres , Rango del Movimiento Articular/fisiología , Recuperación de la Función , Técnicas de Sutura , Factores de Tiempo , Resultado del Tratamiento
12.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-402500

RESUMEN

BACKGROUND: Ginsenoside Rb1 has been extensively used in the protection and treatment of heart, encephalon, lung, kidney and liver damage. However, its application in skin flap is rare.OBJECTIVE: To investigate the effects of intraperitoneal injection of ginsenoside Rb1 on the survival of the dorsal random-pattern skin flap with large length-to-width ratio in rats.METHODS: Healthy adult SD rats were randomly divided into experimental and control groups. A caudally based dorsal random pattern skin flap, 80 mmx20 mm (length: width = 4:1), was symmetrically made. Ginsenoside Rb1 (2 mg/kg) was intraperitoneally injected into the experimental group rats, and the same volume of normal saline was injected into the control group. Malonyl dialdehyde (MDA) and nitric oxide (NO) level of the flaps were tested 1 day after operation; the amount of viable tissues of the flaps were examined by planimetry 10 days after operation. Specimens from the proximal, middle and distal flaps were harvested for HE staining to examine the microstructure.RESULTS AND CONCLUSION: At the first day after operation, NO level was higher in the experimental group than the control group (P< 0.01), while MDA level was lower than the control group (P< 0.01). At the 10th day after operation, the survival rate of the flap was significantly greater in the experimental group than the control group (P < 0.001). Histological observation showed that compared with the control group, the edema and inflammatory cells infiltration were less, while the fiber hyperplasia and the microvascular growth were more obvious in the experimental group. Results show that intraperitoneal injection of ginsenoside Rb1 can enhance the blood supply of the flaps and improve the survival of the random-pattern skin flaps with large length-to-width ratio in rats. This may involve its effects of improving NO activity, decreasing lipid peroxidation, and promoting angiogenesis of skin flaps.

13.
Plant Physiol ; 150(4): 1880-901, 2009 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-19502355

RESUMEN

Sugar transporters are central machineries to mediate cross-membrane transport of sugars into the cells, and sugar availability may serve as a signal to regulate the sugar transporters. However, the mechanisms of sugar transport regulation by signal sugar availability remain unclear in plant and animal cells. Here, we report that a sucrose transporter, MdSUT1, and a sorbitol transporter, MdSOT6, both localized to plasma membrane, were identified from apple (Malus domestica) fruit. Using a combination of the split-ubiquitin yeast two-hybrid, immunocoprecipitation, and bimolecular fluorescence complementation assays, the two distinct sugar transporters were shown to interact physically with an apple endoplasmic reticulum-anchored cytochrome b5 MdCYB5 in vitro and in vivo. In the yeast systems, the two different interaction complexes function to up-regulate the affinity of the sugar transporters, allowing cells to adapt to sugar starvation. An Arabidopsis (Arabidopsis thaliana) homolog of MdCYB5, AtCYB5-A, also interacts with the two sugar transporters and functions similarly. The point mutations leucine-73 --> proline in MdSUT1 and leucine-117 --> proline in MdSOT6, disrupting the bimolecular interactions but without significantly affecting the transporter activities, abolish the stimulating effects of the sugar transporter-cytochrome b5 complex on the affinity of the sugar transporters. However, the yeast (Saccharomyces cerevisiae) cytochrome b5 ScCYB5, an additional interacting partner of the two plant sugar transporters, has no function in the regulation of the sugar transporters, indicating that the observed biological functions in the yeast systems are specific to plant cytochrome b5s. These findings suggest a novel mechanism by which the plant cells tailor sugar uptake to the surrounding sugar availability.


Asunto(s)
Metabolismo de los Hidratos de Carbono , Citocromos b5/metabolismo , Malus/metabolismo , Proteínas de Transporte de Membrana/metabolismo , Proteínas de Plantas/metabolismo , Adaptación Fisiológica , Secuencia de Aminoácidos , Arabidopsis/citología , Arabidopsis/metabolismo , Proteínas de Arabidopsis/metabolismo , Carbohidratos/deficiencia , Citocromos b5/química , Cinética , Modelos Biológicos , Datos de Secuencia Molecular , Especificidad de Órganos , Unión Proteica , Transporte de Proteínas , Saccharomyces cerevisiae/citología , Saccharomyces cerevisiae/crecimiento & desarrollo , Saccharomyces cerevisiae/metabolismo , Proteínas de Saccharomyces cerevisiae/metabolismo , Especificidad por Sustrato
14.
J Exp Bot ; 60(3): 1025-34, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19174457

RESUMEN

NAD(+)-dependent sorbitol dehydrogenase (NAD-SDH, EC 1.1.1.14), a key enzyme in sorbitol metabolism, plays an important role in regulating sink strength and determining the quality of apple fruit. Understanding the tissue and subcellular localization of NAD-SDH is helpful for understanding sorbitol metabolism in the apple. In this study, two NAD-SDH cDNA sequences were isolated from apple fruits (Malus domestica Borkh cv. Starkrimson) and named MdSDH5 and MdSDH6. Immunohistochemical analysis revealed that NAD-SDH is distributed in both the flesh and the vascular tissue of the fruit, and the vascular tissue and mesophyll tissue in the young and old leaves, indicating that it is a ubiquitous protein expressed in both sink and source organs. Immunogold electron microscopy analysis demonstrated that NAD-SDH is localized mainly in the cytoplasm and chloroplast of the fruit and leaves. The chloroplast localization of NAD-SDH was confirmed by the transient expression of MdSDH5-GFP and MdSDH6-GFP in the mesophyll protoplast of Arabidopsis. NAD-SDH was also found in electron opaque deposits of vacuoles in young and mature leaves. These data show that NAD-SDH has different subcellular localizations in fruit and leaves, indicating that it might play a different role in sorbitol metabolism in different tissues of apple.


Asunto(s)
Frutas/enzimología , L-Iditol 2-Deshidrogenasa/metabolismo , Malus/enzimología , Hojas de la Planta/enzimología , Secuencia de Aminoácidos , Anticuerpos , Western Blotting , Cloroplastos/enzimología , Clonación Molecular , Frutas/citología , Frutas/ultraestructura , L-Iditol 2-Deshidrogenasa/química , L-Iditol 2-Deshidrogenasa/aislamiento & purificación , Malus/citología , Malus/ultraestructura , Datos de Secuencia Molecular , NAD , Especificidad de Órganos , Filogenia , Hojas de la Planta/citología , Hojas de la Planta/ultraestructura , Transporte de Proteínas , Análisis de Secuencia de Proteína , Fracciones Subcelulares/enzimología
15.
Plant Mol Biol ; 64(5): 531-8, 2007 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-17476573

RESUMEN

Calcium is an important second messenger involved in abscisic acid (ABA) signal transduction. Calcium-dependent protein kinases (CDPKs) are the best characterized calcium sensor in plants and are believed to be important components in plant hormone signaling. However, in planta genetic evidence has been lacking to link CDPK with ABA-regulated biological functions. We previously identified an ABA-stimulated CDPK from grape berry, which is potentially involved in ABA signaling. Here we report that heterologous overexpression of ACPK1 in Arabidopsis promotes significantly plant growth and enhances ABA-sensitivity in seed germination, early seedling growth and stomatal movement, providing evidence that ACPK1 is involved in ABA signal transduction as a positive regulator, and suggesting that the ACPK1 gene may be potentially used for elevating plant biomass production.


Asunto(s)
Proteínas de Arabidopsis/genética , Arabidopsis/genética , Proteínas Quinasas/genética , Ácido Abscísico/farmacología , Arabidopsis/enzimología , Arabidopsis/crecimiento & desarrollo , Cartilla de ADN , Regulación Enzimológica de la Expresión Génica/efectos de los fármacos , Regulación de la Expresión Génica de las Plantas/efectos de los fármacos , Germinación/efectos de los fármacos , Germinación/fisiología , Cinética , Hojas de la Planta/enzimología , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa
16.
Nature ; 443(7113): 823-6, 2006 Oct 19.
Artículo en Inglés | MEDLINE | ID: mdl-17051210

RESUMEN

Abscisic acid (ABA) is a vital phytohormone that regulates mainly stomatal aperture and seed development, but ABA receptors involved in these processes have yet to be determined. We previously identified from broad bean an ABA-binding protein (ABAR) potentially involved in stomatal signalling, the gene for which encodes the H subunit of Mg-chelatase (CHLH), which is a key component in both chlorophyll biosynthesis and plastid-to-nucleus signalling. Here we show that Arabidopsis ABAR/CHLH specifically binds ABA, and mediates ABA signalling as a positive regulator in seed germination, post-germination growth and stomatal movement, showing that ABAR/CHLH is an ABA receptor. We show also that ABAR/CHLH is a ubiquitous protein expressed in both green and non-green tissues, indicating that it might be able to perceive the ABA signal at the whole-plant level.


Asunto(s)
Ácido Abscísico/metabolismo , Proteínas de Arabidopsis/metabolismo , Arabidopsis/metabolismo , Liasas/química , Liasas/metabolismo , Subunidades de Proteína/metabolismo , Arabidopsis/enzimología , Arabidopsis/genética , Proteínas de Arabidopsis/química , Proteínas de Arabidopsis/genética , Regulación de la Expresión Génica de las Plantas , Liasas/genética , Datos de Secuencia Molecular , Plantas Modificadas Genéticamente , Unión Proteica , Subunidades de Proteína/genética , Transducción de Señal , Especificidad por Sustrato
17.
Plant Physiol ; 140(2): 558-79, 2006 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-16407437

RESUMEN

It has been demonstrated that calcium plays a central role in mediating abscisic acid (ABA) signaling, but many of the Ca2+-binding sensory proteins as the components of the ABA-signaling pathway remain to be elucidated. Here we identified, characterized, and purified a 58-kD ABA-stimulated calcium-dependent protein kinase from the mesocarp of grape berries (Vitis vinifera x Vitis labrusca), designated ACPK1 (for ABA-stimulated calcium-dependent protein kinase1). ABA stimulates ACPK1 in a dose-dependent manner, and the ACPK1 expression and enzyme activities alter accordantly with the endogenous ABA concentrations during fruit development. The ABA-induced ACPK1 stimulation appears to be transient with a rapid effect in 15 min but also with a slow and steady state of induction after 60 min. ABA acts on ACPK1 indirectly and dependently on in vivo state of the tissues. Two inactive ABA isomers, (-)-2-cis, 4-trans-ABA and 2-trans, 4-trans-(+/-)-ABA, are ineffective for inducing ACPK1 stimulation, revealing that the ABA-induced effect is stereo specific to physiological active (+)-2-cis, 4-trans-ABA. The other phytohormones such as auxin indoleacetic acid, gibberellic acid, synthetic cytokinin N-benzyl-6-aminopurine, and brassinolide are also ineffective in this ACPK1 stimulation. Based on sequencing of the two-dimensional electrophoresis-purified ACPK1, we cloned the ACPK1 gene. The ACPK1 is expressed specifically in grape berry covering a fleshy portion and seeds, and in a developmental stage-dependent manner. We further showed that ACPK1 is localized in both plasma membranes and chloroplasts/plastids and positively regulates plasma membrane H+-ATPase in vitro, suggesting that ACPK1 may be involved in the ABA-signaling pathway.


Asunto(s)
Ácido Abscísico/farmacología , Calcio/fisiología , Proteínas de la Membrana/metabolismo , Proteínas de Plantas/metabolismo , Proteínas Quinasas/metabolismo , Vitis/enzimología , Secuencia de Aminoácidos , Southern Blotting , Membrana Celular/metabolismo , Cloroplastos/metabolismo , Cloroplastos/ultraestructura , Clonación Molecular , Frutas/efectos de los fármacos , Frutas/enzimología , Proteínas de la Membrana/análisis , Proteínas de la Membrana/genética , Datos de Secuencia Molecular , Filogenia , Proteínas de Plantas/análisis , Proteínas de Plantas/genética , Proteínas Quinasas/análisis , Proteínas Quinasas/genética , Alineación de Secuencia , Análisis de Secuencia de ADN , Transducción de Señal/efectos de los fármacos , Regulación hacia Arriba , Vitis/efectos de los fármacos
18.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-564000

RESUMEN

Objective To retrospectively review the diagnosis and treatment of intraarticular synovial hemangioma of the knee under arthroscope. Methods Six cases of intraarticular synovial hemangioma of the knee were included. The examination of X ray and MRI before surgery indicated intraarticular synovial hemangioma in 5 cases and pigmented villonodular synovitis in 1 case, then arthroscopic diagnosis and excision of the lesions were followed. Results The six cases were definitely diagnosed as intraarticular synovial hemangioma. Under arthroscope, the lesions exhibited as irregular dark blue or purple capillary clumps of different sizes. The postoperative follow-up of 10.7 months in average (range 4-23 months) shows good joint function for all the patients and no signs of recurrence at the last follow-up. Conclusion Intraarticular synovial hemangioma is rare with a high rate of misdiagnosis. Careful physical examination and MRI can help to make the diagnosis. Arthroscopic surgery is a choice of diagnosis and treatment for intraarticular synovial hemangioma of knee.

19.
Artículo en Chino | WPRIM (Pacífico Occidental) | ID: wpr-677100

RESUMEN

Aim To evaluate the effects of pantoprazole on various experimental acute ulcer inrats and mice. Methods The model of a gastric ulcer of rats or mice was caused bystree- induced ulcer and ligatel pylurus-induced ulcer. Results & Conclusions At adose of 5, 10, 20 mg? kg-1 of Pantoprazole can markedly decrease the ulcer index ofstree-induced ulcer. Pantoprazole(4, 8, 16 mg? kg -1 ) significantly decrease the areaof ligated pylorus-induced gastric ulcer. It was also found that pantoprazole caninhibit the output of basic gastric acid.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...