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1.
J Craniofac Surg ; 33(2): 679-683, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34519710

RESUMO

ABSTRACT: Fat fixation is a key step in filling tear trough depression with inferior eyelid orbital septum fat. The ideal position for inferior eyelid fat fixation is to cross the tear trough ligament causing tear trough depression and the orbicularis retaining ligament, with the distal end fixed at the farthest end of the dissected lacuna deep down the inferior orbicularis oculi muscle. Traditional suturing is difficult in the deep narrow lacunae, but a buried guide needle can be used to suture and fix the fat in the deepest lacuna. In this study, 264 patients who underwent tear trough filling using a buried guide needle to fix the released inferior eyelid orbital septum fat from 2017 to 2020 were followed up. The preoperative and postoperative imaging findings were compared to evaluate the effectiveness of the operation and postoperative complications. The inferior eyelid bulging, loose skin, and tear trough depression significantly improved than that before the operation. None of the patients had any severe complications, such as inferior eyelid ectropion, lagophthalmos, scar hyperplasia, and diplopia, in the long term (6 months) postoperatively. Five patients showed mild eyelid-eyeball separation and recovered in 1 month. Four patients had diplopia, and 3 patients had chemosis; all recovered in 7 days. The tear trough depression was not corrected completely in 2 patients. The operation showed satisfactory results in the improvement of tear trough depression in addition to alleviation of inferior eyelid bulging and loose inferior eyelid skin that is caused by the traditional inferior eyelid pouch removal.


Assuntos
Blefaroplastia , Ectrópio , Lacerações , Tecido Adiposo/transplante , Blefaroplastia/métodos , Depressão , Diplopia/cirurgia , Ectrópio/cirurgia , Pálpebras/cirurgia , Humanos , Lacerações/cirurgia
3.
Ann Bot ; 111(1): 69-77, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23118122

RESUMO

BACKGROUND AND AIMS: Acidic soils are dominated chemically by more ammonium and more available, so more potentially toxic, aluminium compared with neutral to calcareous soils, which are characterized by more nitrate and less available, so less toxic, aluminium. However, it is not known whether aluminium tolerance and nitrogen source preference are linked in plants. METHODS: This question was investigated by comparing the responses of 30 rice (Oryza sativa) varieties (15 subsp. japonica cultivars and 15 subsp. indica cultivars) to aluminium, various ammonium/nitrate ratios and their combinations under acidic solution conditions. KEY RESULTS: indica rice plants were generally found to be aluminium-sensitive and nitrate-preferring, while japonica cultivars were aluminium-tolerant and relatively ammonium-preferring. Aluminium tolerance of different rice varieties was significantly negatively correlated with their nitrate preference. Furthermore, aluminium enhanced ammonium-fed rice growth but inhibited nitrate-fed rice growth. CONCLUSIONS: The results suggest that aluminium tolerance in rice is antagonistic with nitrate preference and synergistic with ammonium preference under acidic solution conditions. A schematic diagram summarizing the interactions of aluminium and nitrogen in soil-plant ecosystems is presented and provides a new basis for the integrated management of acidic soils.


Assuntos
Adaptação Fisiológica/efeitos dos fármacos , Alumínio/toxicidade , Nitratos/farmacologia , Oryza/efeitos dos fármacos , Oryza/fisiologia , Compostos de Amônio Quaternário/farmacologia , Modelos Biológicos , Nitrogênio/farmacologia , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/crescimento & desenvolvimento , Brotos de Planta/efeitos dos fármacos , Brotos de Planta/crescimento & desenvolvimento , Solo
4.
Beijing Da Xue Xue Bao Yi Xue Ban ; 44(2): 176-81, 2012 Apr 18.
Artigo em Zh | MEDLINE | ID: mdl-22516983

RESUMO

OBJECTIVE: To learn about the prevalence and risk factors of coronary artery disease (CAD) in rheumatoid arthritis (RA). METHODS: Data were obtained from a 12-month retrospective investigation of the patients with RA, randomly selected from Departments of Rheumatology and Immunology in 21 big hospitals in China. The data were collected about their social conditions, clinical conditions, medications associated with RA, such as disease modifying anti-rheumatic drugs (DMARDs), non steroidal anti-inflammatory drugs (NSAIDs), glucocorticoid, biologic agents. A nonparameter test and multivariate logistic regression analysis were performed. RESULTS: In the study, 960 patients were enrolled. The prevalence of CAD was 3.5% in China, which was obviously higher than that of normal people. The prevalence of overweight and obesity, smoking, hypertension, diabetes mellitus, hypercholesterolemia and cerebrovascular disease were 35.1%, 12.3%, 17.0%, 7.7%, 0.4% and 3.0%, respectively. Compared with the control group, the CAD group had higher age [(64.7±9.3) years vs. (52.3±14.0) years,P<0.001], more rheumatoid nodules (14.7% vs. 3.1%,P=0.005), lower rate of hydroxychloroquine (HCQ) use (5.9% vs. 22.6%,P=0.021), higher prevalence rates of lung interstitial disease (17.5% vs. 7.0%,P<0.001), diabetes mellitus and hypertension (29.4% vs. 7.0%,P<0.001; 38.2% vs. 16.2%,P=0.001). There was no obvious correlation of CAD in RA with joint deformity, rheumatoid factor (RF) titer, glucocorticoid use, hypercholesterolemia and body mass index (BMI). Multivariate analysis showed higher age, diabetes mellitus and hypertension were independent predictors of CAD, and the use of HCQ was a protective factor of CAD. CONCLUSION: The prevalence of CAD is 3.5%. Higher age, diabetes mellitus and hypertension are independent predictors of CAD, and the use of HCQ is a protective factor of CAD.


Assuntos
Artrite Reumatoide/complicações , Doença da Artéria Coronariana/complicações , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Criança , China/epidemiologia , Doença da Artéria Coronariana/epidemiologia , Diabetes Mellitus Tipo 2/complicações , Feminino , Humanos , Hipertensão/complicações , Masculino , Pessoa de Meia-Idade , Prevalência , Fatores de Risco , Inquéritos e Questionários , Adulto Jovem
5.
World J Gastrointest Surg ; 13(11): 1390-1404, 2021 Nov 27.
Artigo em Inglês | MEDLINE | ID: mdl-34950428

RESUMO

BACKGROUND: Controversy over the issue that No. 12a lymph node involvement is distant or regional metastasis remains, and the possible inclusion of 12a lymph nodes in D2 lymphadenectomy is unclear. As reported, gastric cancer (GC) located in the lower third is highly related to the metastasis of station 12a lymph nodes. AIM: To investigate whether the clinicopathological factors and metastasis status of other perigastric nodes can predict station 12a lymph node metastasis and evaluate the prognostic significance of station 12a lymph node dissection in patients with lower-third GC. METHODS: A total of 147 patients with lower-third GC who underwent D2 or D2+ lymphadenectomy, including station 12a lymph node dissection, were included in this retrospective study from June 2003 to March 2011. Survival prognoses were compared between patients with or without station 12a lymph node metastasis. Logistic regression analyses were used to clarify the association between station 12a lymph node metastasis and clinicopathological factors or metastasis status of other perigastric nodes. The metastasis status of each regional lymph node was evaluated to identify the possible predictors of station 12a lymph node metastasis. RESULTS: Metastasis to station 12a lymph nodes was observed in 18 patients with lower-third GC, but not in 129 patients. The incidence of station 12a lymph node involvement was reported as 12.2% in patients with lower-third GC. The overall survival of patients without station 12a lymph node metastasis was significantly better than that of patients with station 12a metastasis (P < 0.001), which could also be seen in patients with or without extranodal soft tissue invasion. Station 12a lymph node metastasis and extranodal soft tissue invasion were identified as independent predictors of poor prognosis in patients with lower-third GC. Advanced pN stage was defined as independent risk factor significantly correlated with station 12a lymph node positivity. Station 3 lymph node staus was also proven to be significantly correlated with station 12a lymph node involvement. CONCLUSION: Metastasis of station 12a lymph nodes could be considered an independent prognosis factor for patients with lower-third GC. The dissection of station 12a lymph nodes may not be ignored in D2 or D2+ lymphadenectomy due to difficulties in predicting station 12a lymph node metastasis.

6.
Yi Chuan ; 32(10): 1065-70, 2010 Oct.
Artigo em Zh | MEDLINE | ID: mdl-20943495

RESUMO

A rice (Oryza sativa L.) mutant with a high-tillering capacity, designated as ht1, was found from a japonica rice variety Xindao18. This high-tillering mutant phenotype was stably expressed through successive five self-crossed generations, and the number of tillers in mutants was three times more than that in wild-type rice. Genetic analysis showed that the phenotype of ht1was controlled by a single dominant nuclear gene, temporarily designated as HT1. By means of molecular marker technique, the HT1 gene was mapped to an interval between two SSR markers RM25435 and RM25552 on chro-mosome 10. Through high-resolution linkage analysis, the HT1 gene was further restricted to a 0.1 cM region flanked by two SSR markers RM25523 and RM25532. The physical distance between these two markers is about 130kb.


Assuntos
Mapeamento Cromossômico , Mutação , Oryza/genética , Locos de Características Quantitativas
7.
PhytoKeys ; 157: 155-166, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32934453

RESUMO

Allocheilos W.T.Wang in Gesneriaceae was described in 1983 and is characterized by its 4-lobed adaxial lip and undivided abaxial lip with acute apex. The genus is endemic to the karst regions in southwestern China and is classified as endangered due to habitat loss. During surveys of the karst areas in Yunnan of southwestern China in 2017, we collected two unknown species of the genus and later confirmed their novelty to science based on the detailed observation of their morphological characteristics, viz. A. maguanensis W.H.Chen & Y.M.Shui and A. rubroglandulosus W.H.Chen & Y.M.Shui. Their relationships with the similar species and provisional conservation status are discussed.

8.
PhytoKeys ; 157: 207-216, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32934459

RESUMO

Two new species of Gesneriaceae, Paraboea myriantha sp. nov. and P. brevipedunculata sp. nov. are described and illustrated with photos. They grow in the Caryota obtusa forests from Yunnan Province of China. P. myriantha is closely related to P. glutinosa (Hand.-Mazz.) K.Y.Pan, but differs mainly in corolla outside glandular-puberulent, adaxial corolla lobes semicordate, corolla tube obliquely campanulate, and filaments glandular-puberulent. P. brevipedunculata is closely related to P. crassifolia (Hemsley) B. L. Burtt, but different mainly in simple dichasia with 1 and 2 flowers, peduncles 0.5-2 cm long and capsules slightly twisted. The geographical relationship between the two new species and their similar species has been discussed.

9.
PhytoKeys ; 157: 217-226, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32934460

RESUMO

One new species and one new variety of Gesneriaceae in Vietnam are described, viz. Paraboea sinensis var. glabrissimavar. nov. and Primulina xuansonensis sp. nov. These two new taxa grow in limestone regions in North Vietnam. The former new variety differs from Paraboea sinensis (Oliv.) Burtt var. sinensis in its young leaf abaxially, stem and peduncle sparsely and thin pannose, acute top of leaves, pistil glandular-pubescent or pubescent. The latter new species differs in its bracts 1.6-2.5 × 1.3-1.5 cm, corolla 3-3.5 cm long, corolla tube slightly curved near the base and inflated on the adaxial surface near the corolla lobes, and corolla abaxial lip lobes rounded. The two new taxa grow at Xuan Son National Natural Reserve, North Vietnam and remain undisturbed with low risk of extinction.

10.
PhytoKeys ; 157: 27-41, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32934446

RESUMO

The former genus Bournea is endemic to China, including two species, has been under consideration for incorporation into the expanded genus Oreocharis s.l. in Gesneriaceae. The phylogenetic tree inferred from two DNA sequences (trnL-F and ITS) showed that this genus is deeply nested into Oreocharis s.l. However, the new tree from seven ones (atpB-rbcL, ndhH-rps15-ycf1, rpl132, trnC-trnD, trnL-F, trnT-trnL of chloroplast DNA and ITS regions) revealed that Bournea is the sister group of other of Oreocharis s.l. Furthermore, Bournea is morphologically different from other Oreocharis based on existing data. We suggest keeping Bournea as an independent genus in Gesneriaceae.

11.
PhytoKeys ; 157: 199-206, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32934458

RESUMO

A new species of Deinostigma (Gesneriaceae) from Yunnan, China, Deinostigma fasciculatum W.H.Chen & Y.M.Shui, sp. nov., has been discovered and described. In the genus, the new species is similar to D. cicatricosum (W.T. Wang) D.J. Middleton & Mich. Möller and D. cyrtocarpum (D. Fang & L. Zeng) Mich. Möller & H.J. Atkins in dark purple flowers and falcate fruit, but differs from them mainly in the inflorescences with fasciculate flowers, calyx lobes (reflexed, narrowly lanceolate and 1.2-1.3 cm long), corolla tubes (sharply contracted below middle and white outside and below throat). The above three species grow nearby non-limestone wet cliffs and geographically isolated with different distributions (the new species in Southeast Yunnan, D. cicatricosum in Eastern Guangxi and D. cyrtocarpum in Southern Guangxi and Guangdong, China).

12.
Surgery ; 168(6): 1003-1014, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32321665

RESUMO

BACKGROUND: Neoadjuvant chemotherapy may benefit patients with pancreatic ductal adenocarcinoma with resectable and borderline disease. Inappropriate use of neoadjuvant therapy, however, may lead to the loss of therapeutic opportunities. Until an effective prediction model of individual drug sensitivity is established, no accurate model exists to help surgeons decide on the appropriate use of neoadjuvant chemotherapy. We hypothesized that early recurrence in patients undergoing upfront, early resection may be an indication for neoadjuvant chemotherapy. Therefore, we aimed to use preoperative clinical parameters to establish a model of early recurrence to select patients at high risk for neoadjuvant chemotherapy. METHODS: Patients who underwent resection for pancreatic ductal adenocarcinoma between January 2014 and November 2017 were analyzed retrospectively. After the minimum P-value approach, the patients were divided into three groups: early recurrence, middle recurrence, and late/non-recurrence. Preoperative clinicopathologic factors that could predict early recurrence were included in a Cox proportional hazards regression model for univariate and multivariate analyses. The factors related to early recurrence were included to establish nomogram and decision tree models, which were then validated in 68 patients. RESULTS: We found that 235 (72.5%) of 324 patients had recurrence with a median recurrence-free survival of 210 days. The early recurrence, middle recurrence, and late/non-recurrence groups differed in preoperative carbohydrate antigen 19-9 and carcinoembryonic antigen levels, "resectability" on cross-sectional imaging, resection requiring a vascular resection, T stage, tumor size, and adjuvant chemotherapy. The best cutoff value of early recurrence was the first 162 days postoperatively. Univariate and multivariate analyses showed that selected preoperative chief complaints, lymph node enlargement and resectability on cross-sectional imaging, preoperative carbohydrate antigen 19-9 levels >210 kU/L, and a neutrophil/lymphocyte ratio >4.2 were independent predictors for early recurrence. CONCLUSION: We have successfully built a prediction model of early recurrence of patients with pancreatic ductal adenocarcinoma with the optimal cutoff early-recurrence value of 162 days. Our nomogram and decision tree models may be used to select those at high risk for early recurrence to guide preoperative decision-making concerning the use of neoadjuvant therapy in those patients who have "resectable" disease and not only the more classic criteria of borderline resectability.


Assuntos
Carcinoma Ductal Pancreático/terapia , Terapia Neoadjuvante , Recidiva Local de Neoplasia/epidemiologia , Nomogramas , Pancreatectomia , Neoplasias Pancreáticas/terapia , Idoso , Antígeno CA-19-9 , Carcinoma Ductal Pancreático/sangue , Carcinoma Ductal Pancreático/diagnóstico , Carcinoma Ductal Pancreático/mortalidade , Quimioterapia Adjuvante , Tomada de Decisão Clínica/métodos , Intervalo Livre de Doença , Feminino , Seguimentos , Humanos , Contagem de Linfócitos , Linfócitos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/prevenção & controle , Estadiamento de Neoplasias , Neutrófilos , Pâncreas/diagnóstico por imagem , Pâncreas/patologia , Pâncreas/cirurgia , Neoplasias Pancreáticas/sangue , Neoplasias Pancreáticas/diagnóstico , Neoplasias Pancreáticas/mortalidade , Seleção de Pacientes , Período Pré-Operatório , Estudos Retrospectivos , Medição de Risco/métodos , Tomografia Computadorizada por Raios X
13.
Mol Ther Nucleic Acids ; 18: 155-165, 2019 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-31546150

RESUMO

Menin displays either tumor suppression or promotion functions in a context-dependent manner. Previously, we proposed that Menin acts as a tumor suppressor by inhibiting cell growth in pancreatic ductal adenocarcinoma (PDAC), whereas the relationship between the Menin expression and overall survival rate of PDAC patients has not been completely elucidated, indicating the complexity of Menin functions in PDAC progression. Here, we identify Menin as a promoter of epithelial-mesenchymal transition (EMT), which is largely associated with cell migration or metastasis, with modest activity in cell growth inhibition. Ectopic expression of Menin suppresses the expression of CCAAT/enhancer-binding protein beta (CEBPB) and epithelial-specific genes by histone deacetylation and further enhances the TGF-ß signaling-related EMT process. We also demonstrate that CCAAT/enhancer binding protein (C/EBP) beta (C/EBPß; encoded by CEBPB) acts downstream of Menin and TGF-ß signaling for balancing growth inhibition and EMT, and C/EBPß overexpression could restore the anti-cancer functions of Menin in pancreatic cancer by cooperatively activating CDKN2A/B genes and antagonizing EMT processes. Taken together, our results suggest that Menin functions as an oncogene for cancer metastasis upon C/EBPß depletion or acts as a tumor suppressor by cooperation with C/EBPß to activate CDKN2A transcription.

14.
Front Plant Sci ; 9: 1346, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30337932

RESUMO

The root of Panax notoginseng (P. notoginseng) is one of the most highly valuable medicinal herbs in China owing to its pronounced hemostatic and restorative properties. Despite this important fact, growing P. notoginseng is seriously limited by root-rot diseases. In studies aimed at developing a solution to this problem, environment-friendly essential oils (EOs) of five medicinal plants of the family Zingiberaceae were tested for their inhibitory effects on the growth of three main soil pathogens associated with the root-rot diseases of P. notoginseng. The results showed that the EOs of Alpinia katsumadai Hayata and Zingiber officinale Roscoe promote significant reductions in the mycelium growth of the pathogen in vitro at a concentration of 50 mg mL-1, which is much higher than that needed (5 mg mL-1) to reduce growth by the positive control, flutriafol. Furthermore, the chemical components of the two EOs were determined by using GC-MS analysis. Eucalyptol was found to account for more than 30% of the oils of the two plants, with the second major components being geranyl acetate and α-terpineol. These substances display different degrees of fungistasis in vitro. To further determine the effects of the EO of Zingiber officinale (Z. officinale) in vivo, soilless cultivation of P. notoginseng with pathogen inoculation was conducted in a greenhouse. Addition of the petroleum ether extract (approximately equal to EO) of Z. officinale to the culture matrix causes a large decrease in both the occurrence and severity of the P. notoginseng root-rot disease. The decreasing trend of net photosynthetic rate (Pn), stomatal conductance (gs), intercellular CO2 concentration (Ci), and transpiration rate (Tr) were all alleviated. In addition, the activities of catalase (CAT), peroxidase (POD), and the malondialdehyde (MDA) content were also largely reduced after pathogen infection, with the root activity being higher than that of the control. Taken together, the findings reveal that the EOs from plants might serve as promising sources of eco-friendly natural pesticides with less chemical resistance.

15.
Sci Rep ; 7(1): 7016, 2017 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-28765540

RESUMO

Increasing grain zinc (Zn) concentration of cereals for minimizing Zn malnutrition in two billion people represents an important global humanitarian challenge. Grain Zn in field-grown wheat at the global scale ranges from 20.4 to 30.5 mg kg-1, showing a solid gap to the biofortification target for human health (40 mg kg-1). Through a group of field experiments, we found that the low grain Zn was not closely linked to historical replacements of varieties during the Green Revolution, but greatly aggravated by phosphorus (P) overuse or insufficient nitrogen (N) application. We also conducted a total of 320-pair plots field experiments and found an average increase of 10.5 mg kg-1 by foliar Zn application. We conclude that an integrated strategy, including not only Zn-responsive genotypes, but of a similar importance, Zn application and field N and P management, are required to harvest more grain Zn and meanwhile ensure better yield in wheat-dominant areas.


Assuntos
Agricultura/métodos , Grão Comestível/química , Triticum/química , Triticum/crescimento & desenvolvimento , Zinco/análise , Fertilizantes , Genótipo , Humanos , Nitrogênio/metabolismo , Fósforo/metabolismo , Triticum/genética , Triticum/metabolismo
16.
Cell Biosci ; 5: 58, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26464794

RESUMO

Hepatocyte nuclear factor-1beta (HNF1ß) was initially identified as a liver-specific transcription factor. It is a homeobox transcription factor that functions as a homodimer or heterodimer with HNF1α. HNF1ß plays an important role in organogenesis during embryonic stage, especially of the liver, kidney, and pancreas. Mutations in the HNF1ß gene cause maturity-onset diabetes of the young type 5 (MODY5), renal cysts, genital malformations, and pancreas atrophy. Recently, it has been shown that the expression of HNF1ß is associated with cancer risk in several tumors, including hepatocellular carcinoma, pancreatic carcinoma, renal cancer, ovarian cancer, endometrial cancer, and prostate cancer. HNF1ß also regulates the expression of genes associated with stem/progenitor cells, which indicates that HNF1ß may play an important role in stem cell regulation. In this review, we discuss some of the current developments about HNF1ß and tumor, the relationship between HNF1ß and stem/progenitor cells, and the potential pathogenesis of HNF1ß in various tumors.

17.
Sci Rep ; 5: 13319, 2015 Aug 27.
Artigo em Inglês | MEDLINE | ID: mdl-26311117

RESUMO

Hepatocyte nuclear factor-1beta (HNF-1B) is involved in the hepatobiliary specification of hepatoblasts to cholangiocytes during liver development, and is strongly expressed throughout adult biliary epithelium. The aim of this study was to examine the expression of HNF-1B in different pathologic subtypes of primary liver cancer, including hepatocellular carcinoma (HCC) and cholangiocarcinoma (ICC), and the relationship between HNF-1B expression, clinicopathological features and prognosis. We retrospectively investigated 2 cohorts of patients, including 183 HCCs and 69 ICCs. The expression of HNF-1B was examined by immunohistochemistry. We found that HNF-1B expression was associated with pathological subtype of primary tumor, and HNF-1B expression in HCC tissue may be associated with the change of phenotype on recurrence. The HNF-1B expression was positively correlated with biliary/HPC (hepatic progenitor cell) markers expression. Further, multivariable analysis showed that HNF-1B expression was an independent prognostic factor for both overall survival and disease-free survival of HCC patients. However, no correlation between HNF-1B expression and survival was found in ICC patients. In summary, HCC with high HNF-1B expression displayed biliary phenotype and tended to show poorer prognosis. HNF-1B-positive malignant cells could be bipotential cells and give rise to both hepatocytic and cholangiocytic lineages during tumorigenesis.


Assuntos
Ductos Biliares/patologia , Carcinoma Hepatocelular/metabolismo , Fator 1-beta Nuclear de Hepatócito/metabolismo , Neoplasias Hepáticas/metabolismo , Biomarcadores Tumorais/metabolismo , Carcinoma Hepatocelular/patologia , Proliferação de Células , Colangiocarcinoma/metabolismo , Colangiocarcinoma/patologia , Intervalo Livre de Doença , Feminino , Humanos , Estimativa de Kaplan-Meier , Neoplasias Hepáticas/patologia , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Recidiva Local de Neoplasia/patologia , Fenótipo , Prognóstico , Células-Tronco/metabolismo
18.
Oncotarget ; 6(40): 42952-62, 2015 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-26515593

RESUMO

Hepatitis B virus (HBV) infection is a risk factor for hepatocarcinogenesis and recurrence. Here, we sought to characterize intratumoral and peritumoral expression of HBsAg and its specific receptors in HBsAg-positive hepatocellular carcinoma (HCC) patients and further examined their correlation with the recurrence-free survival (RFS). HCC tissue and adjacent normal tissue specimens were acquired from HBsAg-positive patients. The presence of HBsAg and receptors, as well as hepatic progenitor cells (HPCs) were detected by tissue microassay and immunohistochemistry. Necroinflammatory activity was evaluated by HE staining. The mean IOD of HBsAg and HBV DNA in the intratumoral tissues was markedly lower than that in the peritumoral tissues (P < 0.001). Pearson correlation analysis further showed a significant correlation between the expression of HBsAg and NTCP (r = 0.461, P < 0.001) or ASGPR (r = 0.506, P < 0.001) in peritumoral tissues. And the peritumoral HBsAg and receptors presented a positive association with necroinflammatory activity (P < 0.05). Inflammation induced by HBV infection presented a positive association with HPCs activation (P < 0.05). Additionally, due to lack of HBV receptors, HPCs was not preferentially infected with HBV, but activated HPCs had a significant correlation with HBsAg expression in peritumoral tissues, and the peritumoral HPCs activation was associated with RFS of HCC patients, therefore, the overexpression of HBsAg and receptors in peritumor were also with higher recurrence risk (P < 0.05). In conclusion, lack of HBV receptors resulted in scant HBV infection in tumor cells, and overexpression of HBsAg and receptors in peritumor was strongly associated with higher recurrence risk in HCC patients.


Assuntos
Carcinoma Hepatocelular/patologia , Carcinoma Hepatocelular/virologia , Hepatite B/complicações , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/virologia , Recidiva Local de Neoplasia/virologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Receptor de Asialoglicoproteína/análise , Receptor de Asialoglicoproteína/biossíntese , Carcinoma Hepatocelular/mortalidade , Criança , DNA Viral/análise , Intervalo Livre de Doença , Feminino , Antígenos de Superfície da Hepatite B/análise , Humanos , Imuno-Histoquímica , Hibridização in Situ Fluorescente , Inflamação/patologia , Inflamação/virologia , Estimativa de Kaplan-Meier , Neoplasias Hepáticas/mortalidade , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/patologia , Transportadores de Ânions Orgânicos Dependentes de Sódio/análise , Transportadores de Ânions Orgânicos Dependentes de Sódio/biossíntese , Simportadores/análise , Simportadores/biossíntese , Análise Serial de Tecidos , Adulto Jovem
19.
Cancer Lett ; 346(2): 278-84, 2014 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-24462821

RESUMO

Activation of p53 can induce apoptosis, cell cycle arrest, and cell senescence, although some evidence has suggested that p53 could promote cell survival. However, whether p53 plays a positive role in cancer cell survival to chemotherapy remains unknown. In this study, we show that inhibition of p53 enhanced apoptosis and increased chemosensitivity to 5-fluorouracil (5-FU) in nutrient-deprived hepatocarcinoma cells (HCC). Meanwhile, nutrient-deprivation-induced autophagy was inhibited by pifithrin-α or small interfering RNA targeting p53. The expression of p53 was not increased when HCC were incubated under nutrient-deprived conditions. This indicates that the basal level of p53 is important to autophagy activation in nutrient-deprived HCC cells. Furthermore, combining p53 inhibition and nutrient deprivation or 5-FU treatment resulted in a marked increase in reactive oxygen species generation and mitochondrial damage. Antioxidants reduced nutrient deprivation or 5-FU-induced cell death of HCC after p53 inhibition. Our results suggest that p53 contributes to cell survival and chemoresistance in HCC under nutrient-deprived conditions by modulating autophagy activation.


Assuntos
Antimetabólitos Antineoplásicos/farmacologia , Benzotiazóis/farmacologia , Carcinoma Hepatocelular/tratamento farmacológico , Fluoruracila/farmacologia , Neoplasias Hepáticas/tratamento farmacológico , Tolueno/análogos & derivados , Proteína Supressora de Tumor p53/antagonistas & inibidores , Apoptose/efeitos dos fármacos , Autofagia/efeitos dos fármacos , Carcinoma Hepatocelular/metabolismo , Carcinoma Hepatocelular/patologia , Linhagem Celular Tumoral , Sinergismo Farmacológico , Células Hep G2 , Humanos , Neoplasias Hepáticas/metabolismo , Neoplasias Hepáticas/patologia , Mitocôndrias Hepáticas/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Tolueno/farmacologia
20.
Cell Biosci ; 4(1): 50, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25197550

RESUMO

BACKGROUND: Ductular reactions (DRs) are well documented in many acute and chronic liver disease.The DRs are thought to be the transit amplifying cells deriving from activation of the stem/progenitor cell compartments of the liver. The aim of this study was to examine the presence of proliferative index of DR (PI-DR) and HPC markers' expression in HCCs after curative hepatectomy, as well as their relationship with clinicopathological features and prognosis. RESULTS: Tissue microarray with peritumoral and intratumoral tissue samples of 120 HCCs after hepatectomy was analysed for peritumoral expression of proliferating cell nuclear antigen for PI-DR. Peritumoral and intratumoral expression status of HPC markers including EpCAM, OV6, CD133 and c-kit were also examined by immunohistochemistry. TMA analysis of HCCs revealed that peritumoral PI-DR strongly correlated with the degree of inflammation and fibrosis. The peritumoral PI-DR positively correlated with peritumoral HPC markers EpCAM, OV6, CD133 and c-kit expression. Moreover, there were highly significant correlations between peritumoral PI-DR and intratumoral HPC markers EpCAM, OV6, CD133 and c-kit expression. Further, multivariate analysis showed that peritumoral PI-DR was the independent prognostic factor for overall survival (HR; 3.316, P < 0.001), and peritumoral PI-DR had a better power to predict disease-free survival (HR; 2.618, P < 0.001). CONCLUSIONS: Peritumoral PI-DR, as a valid surrogate for peritumoral and intratumoral expression of HPC markers, could be served as a potential prognostic marker for recurrence and survival in HCC after hepatectomy.

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