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1.
Wound Repair Regen ; 29(1): 70-78, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-33073406

RESUMEN

BACKGROUND: Studies have reported associations between health-related quality of life (HRQOL), social support, and mental stress of patients with chronic wound, while the causal relationship is unclear and little is known about the HRQOL of hospitalized them. We therefore investigated the status of HRQOL of hospitalized patients with chronic wound and the causal relationships among social support, mental stress (anxiety and depression) and HRQOL of which. METHODS: A cross-sectional survey was conducted and the demographic and disease characteristics, HRQOL, perceived social support and mental stress of 216 hospitalized patients with chronic wound was surveyed through questionnaires collected by face to face interview. RESULTS: (1) The HRQOL of the non-retired patients was better than that of the retirees (P < .05); Patients with a diabetic foot ulcer, who slept less than 5 hours per night, with moderate pain, wound odor had worse HRQOL (P < .05); Sleep status, diagnosis, and pain scores were entered into the prediction equation of physiological quality of life (PQOL) of the patients (r2 = 0.125, P < .05), retired or not and wound odor were entered into the prediction equation of mental quality of life (MQOL) (r2 = 0.127, P < .05). (2) Perceived social support had a positive predictive effect on the HRQOL of hospitalized patients with chronic wound (ß = 1.161, P < .001), and a negative predictive effect on mental stress of them (ß = -0.902, P < .001). The effect of social support on the HRQOL of hospitalized patients with chronic wound was to provide a buffering effect on their mental stress, the estimated value was 2.121, 95% CI (1.46, 3.25). CONCLUSION: (a) The HRQOL of hospitalized patients with chronic wound was poor and sleep status, diagnosis, pain, retirement status and whether the wound has odor were the main demographic and disease characteristic factors which affected their HRQOL. (2) Perceived social support improved the HRQOL of hospitalized patients with chronic wound by buffering their mental stress.


Asunto(s)
Estado de Salud , Pacientes Internos/psicología , Salud Mental , Calidad de Vida , Cicatrización de Heridas , Heridas y Lesiones/psicología , Adulto , Anciano , Anciano de 80 o más Años , Enfermedad Crónica , Estudios Transversales , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Encuestas y Cuestionarios , Heridas y Lesiones/terapia
2.
Adv Skin Wound Care ; 34(12): 638-644, 2021 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-34807895

RESUMEN

OBJECTIVE: To investigate the prevalence of anxiety and depression among hospitalized patients with a chronic wound and explore the influence of demographic factors, disease characteristics, social support, and coping styles on their mental status. METHODS: Investigators recruited 216 patients with a chronic wound. The Self-rating Anxiety Scale and Self-rating Depression Scale were used to measure anxiety and depression. Patients' coping style and their social support were assessed through face-to-face interviews. RESULTS: Overall, 36.6% of participants presented with symptoms of anxiety, and 37% showed depressive symptoms. Participants who typically had less than 5 hours of sleep; experienced more severe pain; or had an odorous wound, negative coping style, or lower level of social support had a higher prevalence of anxiety and depression (P < .05). Men with higher monthly incomes who lived in the city were more likely to develop anxiety than women with lower monthly incomes who lived outside the city (P < .05). Participants with fewer years of education and without spouses were more likely to experience depression than married participants with more education (P < .05). CONCLUSIONS: The prevalence of anxiety and depression among hospitalized patients with a chronic wound is high. Support from loved ones including a spouse and a positive coping style are key protective factors for mental health and well-being.


Asunto(s)
Ansiedad/etiología , Depresión/etiología , Heridas y Lesiones/complicaciones , Adaptación Psicológica , Adulto , Ansiedad/psicología , Depresión/psicología , Femenino , Hospitalización/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Prevalencia , Calidad de Vida/psicología , Apoyo Social , Encuestas y Cuestionarios , Heridas y Lesiones/psicología
3.
Zhongguo Dang Dai Er Ke Za Zhi ; 23(12): 1208-1213, 2021 Dec 15.
Artículo en Inglés, Zh | MEDLINE | ID: mdl-34911602

RESUMEN

OBJECTIVES: To study the effect of glucose metabolism disorders on the short-term prognosis in neonates with asphyxia. METHODS: A retrospective analysis was performed on the medical data of the neonates with asphyxia who were admitted to 52 hospitals in Hubei Province of China from January to December, 2018 and had blood glucose data within 12 hours after birth. Their blood glucose data at 1, 2, 6, and 12 hours after birth (with an allowable time error of 0.5 hour) were recorded. According to the presence or absence of brain injury and/or death during hospitalization, the neonates were divided into a poor prognosis group with 693 neonates and a good prognosis group with 779 neonates. The two groups were compared in the incidence of glucose metabolism disorders within 12 hours after birth and short-term prognosis. RESULTS: Compared with the good prognosis group, the poor prognosis group had a significantly higher proportion of neonates from secondary hospitals (48.5% vs 42.6%, P<0.05) or with severe asphyxia (19.8% vs 8.1%, P<0.05) or hypothermia therapy (4.8% vs 1.5%, P<0.05), as well as a significantly higher incidence rate of disorder of glucose metabolism (18.8% vs 12.5%, P<0.05). Compared with the good prognosis group, the poor prognosis group had a significantly higher incidence rate of disorder of glucose metabolism at 1, 2, and 6 hours after birth (P<0.05). The multivariate logistic regression analysis showed that recurrent hyperglycemia (adjusted odds ratio=2.380, 95% confidence interval: 1.275-4.442, P<0.05) was an independent risk factor for poor prognosis in neonates with asphyxia. CONCLUSIONS: Recurrent hyperglycemia in neonates with asphyxia may suggest poor short-term prognosis, and it is necessary to strengthen the early monitoring and management of the nervous system in such neonates.


Asunto(s)
Asfixia Neonatal , Hiperglucemia , Asfixia , Asfixia Neonatal/complicaciones , Asfixia Neonatal/epidemiología , Humanos , Recién Nacido , Pronóstico , Estudios Retrospectivos
4.
J Cell Biochem ; 119(11): 8763-8772, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-30126001

RESUMEN

Papillary thyroid cancer (PTC) is the most common endocrine malignancy. Studies have confirmed an association between microRNA (miRNA) and the BRAFV600E mutation in various cellular biological processes of PTC. This study aimed to clarify the potential relationship between miR-150-5p and the BRAFV600E mutation in PTC. Human PTC cell lines B-CPAP and TPC-1 were transfected with the miR-150-5p mimic, an inhibitor, and the corresponding controls. Then, cell proliferation, viability, and apoptosis were detected by bromodeoxyuridine, trypan blue exclusion, and flow cytometry assays. The expressions of the main factors of cell cycle, epithelial mesenchymal transition (EMT), and DNA mismatch repair were examined by Western blot analysis and a real-time quantitative polymerase chain reaction. Additionally, pc-BRAFV600E was transfected into B-CPAP and TPC-1 cells to determine the relationship between miR-150-5p and BRAFV600E . In addition, the methyl ethyl ketone (MEK)/extracellular signal-regulated kinase (ERK) signal pathway was examined using Western blot analysis. Overexpression of miR-150-5p promoted cell proliferation and viability, inhibited apoptosis, and upregulated cell cycle factor expressions at 50 passages of B-CPAP and TPC-1 cells after transfection. Overexpression of miR-150-5p led to an obvious decrease in E-cadherin expression, but enhanced N-cadherin, Slug and Vimentin, ZEB1, and Snail expression. Moreover, overexpression of miR-150-5p markedly suppressed POLD3, MSH2, and MSH3 expression. Furthermore, BRAFV600E overexpression increased the expression level of miR-150-5p in TPC cells, and overexpression of telomerase reverse transcriptase further enhanced the promoting effect of BRAFV600E on miR-150-5p expression in B-CPAP and TPC-1 cells. Finally, BRAFV600E overexpression activated the MEK/ERK signal pathway in B-CPAP and TPC-1 cells. These data indicated that miR-150-5p promoted cell proliferation, suppressed apoptosis, and accelerated the EMT process by regulation of the BRAFV600E mutation. Our findings will help elucidate the pathogenesis of PTC and identify biomarkers.


Asunto(s)
Apoptosis , Proliferación Celular , Transición Epitelial-Mesenquimal , MicroARNs/genética , MicroARNs/metabolismo , Proteínas Proto-Oncogénicas B-raf/genética , Cáncer Papilar Tiroideo/patología , Neoplasias de la Tiroides/patología , Análisis de Varianza , Biomarcadores de Tumor/química , Biomarcadores de Tumor/genética , Biomarcadores de Tumor/metabolismo , Ciclo Celular , Línea Celular Tumoral , Reparación del ADN , Regulación Neoplásica de la Expresión Génica , Humanos , Sistema de Señalización de MAP Quinasas , MicroARNs/química , Imitación Molecular , Mutación , Proteínas Proto-Oncogénicas B-raf/metabolismo , Transfección
5.
Med Princ Pract ; 22(1): 24-8, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-22890443

RESUMEN

OBJECTIVE: To evaluate the changes and the prognostic value of serum vascular endothelial growth factor (VEGF) in patients with differentiated thyroid cancer (DTC). SUBJECTS AND METHODS: A total of 79 patients with DTC and 30 healthy individuals were divided into four groups: (1) a healthy control group (n = 30); (2) DTC without recurrence (n = 35; 23 papillary, 12 follicular); (3) DTC with local recurrence (n = 24; 15 papillary, 9 follicular), and (4) DTC with lung metastasis (n = 20; 13 papillary, 7 follicular). Serum VEGF and thyroglobulin levels were measured in all patients. RESULTS: Serum levels of VEGF were significantly higher in the lung metastasis group than in the other three groups (p < 0.05). Serum thyroglobulin concentration positively correlated with VEGF expression (r = 0.8678, p < 0.001) in patients with thyroid cancer recurrence. Multivariate Cox regression analysis showed that clinical staging (OR = 1.851, 95% CI 1.04-3.47; p = 0.038), noncompliance with postoperative thyroxin replacement therapy (OR = 1.935, 95% CI 1.03-3.65; p = 0.042) and postoperative levels of thyroglobulin (OR = 1.892, 95% CI 1.01-3.56, p = 0.032) were independent predictors for thyroid cancer recurrence. Every additional 100 ng/l of serum VEGF levels increased the risk of thyroid cancer recurrence by 20.3%; but this did not reach statistical significance (OR = 1.203, 95% CI 0.95-1.52; p = 0.125). CONCLUSIONS: Serum VEGF increased in patients with recurrent thyroid cancer following surgical therapies. The predictive value of serum VEGF requires further investigation.


Asunto(s)
Neoplasias Pulmonares/secundario , Neoplasias de la Tiroides/sangre , Neoplasias de la Tiroides/patología , Factor A de Crecimiento Endotelial Vascular/sangre , Adolescente , Adulto , Factores de Edad , Anciano , Femenino , Humanos , Masculino , Cumplimiento de la Medicación , Persona de Mediana Edad , Recurrencia Local de Neoplasia/sangre , Pronóstico , Factores de Riesgo , Factores Sexuales , Tiroglobulina/sangre , Tiroxina/uso terapéutico , Adulto Joven
6.
Transgenic Res ; 21(5): 1023-32, 2012 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-22252123

RESUMEN

Risk assessments of ecological effects of transgenic rice expressing lepidoptera-Cry proteins from Bacillus thuringiensis (Bt) on non-target arthropods have primarily focused on rice plants during cropping season, whereas few studies have investigated the effects in postharvest periods. Harvested rice fallow fields provide a critical over-wintering habitat for arthropods in the Chinese rice ecosystems, particularly in the southern region of the country. During 2006-08, two independent field trials were conducted in Chongqing, China to investigate the effects of transgenic Cry1Ab rice residues on non-target arthropod communities. In each trial, pitfall traps were used to sample arthropods in field plots planted with one non-Bt variety and two Bt rice lines expressing the Cry1Ab protein. Aboveground arthropods in the trial plots during the postharvest season were abundant, while community densities varied significantly between the two trials. A total of 52,386 individual insects and spiders, representing 93 families, was captured in the two trials. Predominant arthropods sampled were detritivores, which accounted for 91.9% of the total captures. Other arthropods sampled included predators (4.2%), herbivores (3.2%), and parasitoids (0.7%). In general, there were no significant differences among non-Bt and Bt rice plots in all arthropod community-specific parameters for both trials, suggesting no adverse impact of the Bt rice plant residues on the aboveground non-target arthropod communities during the postharvest season. The results of this study provide additional evidence that Bt rice is safe to non-target arthropod communities in the Chinese rice ecosystems.


Asunto(s)
Artrópodos/efectos de los fármacos , Proteínas Bacterianas/toxicidad , Endotoxinas/toxicidad , Proteínas Hemolisinas/toxicidad , Oryza/metabolismo , Plantas Modificadas Genéticamente/metabolismo , Agrobacterium/genética , Agrobacterium/metabolismo , Animales , Artrópodos/crecimiento & desarrollo , Bacillus thuringiensis/genética , Bacillus thuringiensis/metabolismo , Toxinas de Bacillus thuringiensis , Proteínas Bacterianas/genética , Proteínas Bacterianas/metabolismo , China , Ecosistema , Endotoxinas/genética , Endotoxinas/metabolismo , Monitoreo del Ambiente/métodos , Proteínas Hemolisinas/genética , Proteínas Hemolisinas/metabolismo , Oryza/genética , Control Biológico de Vectores , Plantas Modificadas Genéticamente/genética , Densidad de Población , Dinámica Poblacional , Estaciones del Año , Transformación Genética
7.
J Econ Entomol ; 104(6): 1892-9, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-22299350

RESUMEN

Transgenic rice expressing Bacillus thuringiensis (Bt) CrylAb protein is expected to be commercialized in China in the near future. The use of Bt rice for controlling insect pests sparks intensive debates regarding its biosafety. Folsomia candida is an euedaphic species and is often used as a "standard" test organism in assessing effects of environmental pollutants on soil organisms. In this study, growth, development, reproduction, and superoxide dismutase activity (SOD) of F. candida were investigated in the laboratory for populations reared on leaf tissue or leaf-soil mixtures of two CrylAb rice lines and a non-Bt rice isoline. Two independent tests were performed: 1) a 35-d test using petri dishes containing yeast diet (positive control) or fresh rice leaf tissue, and 2) a 28-d test in soil-litter microcosms containing yeast or a mixture of soil and rice leaf tissue. Biological parameters measured in both tests were number of progeny production, population growth rate, and SOD activity. For the petri dish test, data measured also included insect body length and number of exuviation. There were no significant differences between the populations reared on Bt and non-Bt rice leaf tissue in all measured parameters in both tests and for both Bt rice lines, suggesting no significant effects of the CrylAb protein in Bt rice on F. candida in the laboratory studies. Results of this study should add additional biosafety proofs for use of Bt rice to manage rice pests in China.


Asunto(s)
Proteínas Bacterianas/farmacología , Toxinas Bacterianas/farmacología , Endotoxinas/farmacología , Proteínas Hemolisinas/farmacología , Insectos/efectos de los fármacos , Oryza/toxicidad , Plantas Modificadas Genéticamente/toxicidad , Superóxido Dismutasa/metabolismo , Animales , Bacillus thuringiensis/genética , Toxinas de Bacillus thuringiensis , Proteínas Bacterianas/genética , Proteínas Bacterianas/metabolismo , Toxinas Bacterianas/genética , Toxinas Bacterianas/metabolismo , Endotoxinas/genética , Endotoxinas/metabolismo , Proteínas Hemolisinas/genética , Proteínas Hemolisinas/metabolismo , Insectos/enzimología , Insectos/crecimiento & desarrollo , Oryza/genética , Oryza/metabolismo , Plantas Modificadas Genéticamente/genética , Plantas Modificadas Genéticamente/metabolismo , Reproducción , Superóxido Dismutasa/antagonistas & inhibidores
8.
Onco Targets Ther ; 11: 6687-6692, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30349302

RESUMEN

PURPOSE: The aim of this study was to evaluate the effect of postoperative thyroid-stimulating hormone suppression (TSHS) on bone mineral density (BMD) in Chinese postmenopausal women with differentiated thyroid carcinoma (DTC). PATIENTS AND METHODS: A total of 225 postmenopausal women with DTC who had received TSHS were included in the study. Postmenopausal women with postoperative DTC undergoing thyroid residual ablation or metastasis treatment between 2009 and 2015 were enrolled and followed up for 2 years. They were divided into two groups: TSHS group (median thyroid-stimulating hormone [TSH] <0.3 µIU/mL) and postmenopausal control group (median TSH >0.3 µIU/mL). Lumbar 1-4 BMD levels were measured by a dual-energy X-ray absorptiometry (DXA) at baseline and 6, 12 and 24 months. All patients had calcium and vitamin D supplementation. The diagnosis of osteopenia (-1 SD > T >-2.5 SD) and osteoporosis (T <-2.5 SD) was made according to WHO guidelines. RESULTS: Thyroid cancers included 211 papillary carcinomas and 14 follicular carcinomas. One hundred and fifty-four patients were in the TSHS group, and 71 patients were in the non-suppressed TSH group (postmenopausal controls). No significant differences were found in the BMD of the lumbar spine between baseline and after 6, 12 and 24 months, pre and post treatment in TSHS and non-suppressed TSH patients. Compared with pre-TSHS, there was a reduction in the BMD of 1.9% in the lumbar spine at the 2-year follow-up. Significant difference in the number of osteopenia and osteoporosis patients at 24 months (χ 2=2.88, P=0.004) was found between the TSHS (103/152) and postmenopausal control (32/68) groups. TSHS is not a significant risk of bone loss, but it is the incidence of osteopenia in postmenopausal women with DTC. CONCLUSION: Our 2-year follow-up data indicated that TSHS had little effect on BMD in postmenopausal women with DTC. Large population with at least 5-year follow-up should be further investigated. BMD in postmenopausal women with DTC should be followed up regularly.

9.
Braz J Med Biol Res ; 51(6): e7046, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29791590

RESUMEN

Thyroid cancer is a common malignant tumor. Long non-coding RNA colon cancer-associated transcript 1 (lncRNA CCAT1) is highly expressed in many cancers; however, the molecular mechanism of CCAT1 in thyroid cancer remains unclear. Hence, this study aimed to investigate the effect of CCAT1 on human thyroid cancer cell line FTC-133. FTC-133 cells were transfected with CCAT1 expressing vector, CCAT1 shRNA, miR-143 mimic, and miR-143 inhibitor, respectively. After different treatments, cell viability, proliferation, migration, invasion, and apoptosis were measured. Moreover, the regulatory relationship of CCAT1 and miR-143, as well as miR-143 and VEGF were tested using dual-luciferase reporter assay. The relative expressions of CCAT1, miR-143, and VEGF were tested by qRT-PCR. The expressions of apoptosis-related factors and corresponding proteins in PI3K/AKT and MAPK pathways were analyzed using western blot analysis. The results suggested that CCAT1 was up-regulated in the FTC-133 cells. CCAT1 suppression decreased FTC-133 cell viability, proliferation, migration, invasion, and miR-143 expression, while it increased apoptosis and VEGF expression. CCAT1 might act as a competing endogenous RNA (ceRNA) for miR-143. Moreover, CCAT1 activated PI3K/AKT and MAPK signaling pathways through inhibition of miR-143. This study demonstrated that CCAT1 exhibited pro-proliferative and pro-metastasis functions on FTC-133 cells and activated PI3K/AKT and MAPK signaling pathways via down-regulation of miR-143. These findings will provide a possible target for clinical treatment of thyroid cancer.


Asunto(s)
MicroARNs/metabolismo , ARN Largo no Codificante/metabolismo , Neoplasias de la Tiroides/metabolismo , Neoplasias de la Tiroides/patología , Apoptosis , Línea Celular Tumoral , Movimiento Celular , Proliferación Celular , Supervivencia Celular , Regulación hacia Abajo , Regulación Neoplásica de la Expresión Génica , Humanos , MicroARNs/genética , Invasividad Neoplásica/patología , ARN Largo no Codificante/genética , Neoplasias de la Tiroides/genética , Transfección
10.
J Genet ; 86(3): 249-57, 2007 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-18305344

RESUMEN

Many novel lines were established from an intergeneric mixoploid between Brassica rapa (2n = 20) and Orychophragmus violaceus (2n = 24) through successive selections for fertility and viability. Pedigrees of individual F(2) plants were advanced to the 10th generation by selfing. Their breeding habit was self-compatible and different from the self-incompatibility of their female parent B. rapa, and these lines were reproductively isolated to different degrees from B. rapa and B. napus. The lines with high productivity showed not only a wide spectrum of phenotypes but also obvious variations in fatty acid profiles of seed oil and glucosinolate contents in seed meal. These lines had 2n = 36, 37, 38, 39 and 40, with 2n = 38 being most frequent (64.56%), and no intact O. violaceus chromosomes were detected by genomic in situ hybridization (GISH) analysis. Amplified fragment length polymorphism (AFLP) analyses revealed a high extent of variation in genomic compositions across all the lines. O. violaceus-specific bands, deleted bands in B. rapa and novel bands for two parents were detected in these lines, with novel bands being the most frequent. The morphological and genetic divergence of these novel types derived from a single hybrid is probably due to rapid chromosomal evolution and introgression, and provides new genetic resources for rapeseed breeding.


Asunto(s)
Brassica rapa/genética , Brassica/genética , Brassicaceae/genética , Análisis del Polimorfismo de Longitud de Fragmentos Amplificados , Evolución Biológica , Brassica/química , Brassica/clasificación , Brassicaceae/clasificación , Cromosomas de las Plantas/genética , Ácidos Grasos/análisis , Glucosinolatos/análisis , Hibridación Genética , Hibridación in Situ , Fenotipo
11.
Rev. bras. pesqui. méd. biol ; Braz. j. med. biol. res;51(6): e7046, 2018. graf
Artículo en Inglés | LILACS | ID: biblio-889094

RESUMEN

Thyroid cancer is a common malignant tumor. Long non-coding RNA colon cancer-associated transcript 1 (lncRNA CCAT1) is highly expressed in many cancers; however, the molecular mechanism of CCAT1 in thyroid cancer remains unclear. Hence, this study aimed to investigate the effect of CCAT1 on human thyroid cancer cell line FTC-133. FTC-133 cells were transfected with CCAT1 expressing vector, CCAT1 shRNA, miR-143 mimic, and miR-143 inhibitor, respectively. After different treatments, cell viability, proliferation, migration, invasion, and apoptosis were measured. Moreover, the regulatory relationship of CCAT1 and miR-143, as well as miR-143 and VEGF were tested using dual-luciferase reporter assay. The relative expressions of CCAT1, miR-143, and VEGF were tested by qRT-PCR. The expressions of apoptosis-related factors and corresponding proteins in PI3K/AKT and MAPK pathways were analyzed using western blot analysis. The results suggested that CCAT1 was up-regulated in the FTC-133 cells. CCAT1 suppression decreased FTC-133 cell viability, proliferation, migration, invasion, and miR-143 expression, while it increased apoptosis and VEGF expression. CCAT1 might act as a competing endogenous RNA (ceRNA) for miR-143. Moreover, CCAT1 activated PI3K/AKT and MAPK signaling pathways through inhibition of miR-143. This study demonstrated that CCAT1 exhibited pro-proliferative and pro-metastasis functions on FTC-133 cells and activated PI3K/AKT and MAPK signaling pathways via down-regulation of miR-143. These findings will provide a possible target for clinical treatment of thyroid cancer.


Asunto(s)
Humanos , MicroARNs/metabolismo , ARN Largo no Codificante/metabolismo , Neoplasias de la Tiroides/patología , Apoptosis , Línea Celular Tumoral , Movimiento Celular , Proliferación Celular , Supervivencia Celular , Regulación hacia Abajo , Regulación Neoplásica de la Expresión Génica , MicroARNs/genética , Invasividad Neoplásica/patología , ARN Largo no Codificante/genética , Transfección
12.
J Agric Food Chem ; 57(19): 8906-12, 2009 Oct 14.
Artículo en Inglés | MEDLINE | ID: mdl-19761185

RESUMEN

The aim of this research was to identify tea varieties containing high levels of catechin methyl ester that could be used as important sources for genetic breeding and in the production of high quality tea. We examined 113 species that have been preserved in the Taitung Branch of the Tea Research and Extension Station of Taiwan (TTES). The average level of (-)-epigallocatechin-3-O-(3-O-methyl) gallate (EGCG3''Me) was 0.45% for all varieties screened. Among them, 16 varieties with higher EGCG3''Me content (>0.8%) were considered good candidates for manufacturing partially fermented tea. Analysis of these tea varieties revealed that the EGCG3''Me content in leaves did not correlate with the caffeine content. Genetic assessments revealed that the lengths of their internal transcribed spacers (ITS) were in the range of 638-670 bp and that the sequence identities were in the range of 0.690-1. Two major groups were constructed by phylogenetic analysis, I and II, with a genetic distance of 0.08 based on the ITS1-5.8S-ITS2 sequences between the ribosomal genes. Our results provide genetic information about tea varieties with elevated EGCG3''Me content and indicate the need for a comprehensive genetic assessment of tea germplasms preserved in the TTES to better serve the future of tea breeding.


Asunto(s)
Camellia sinensis/química , Camellia sinensis/genética , Catequina/análogos & derivados , Catequina/análisis , Hojas de la Planta/química , Cruzamiento , Cafeína/análisis , Metilación , Filogenia , Especificidad de la Especie , Taiwán
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