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1.
Chin Med J (Engl) ; 134(19): 2275-2286, 2021 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-34593696

RESUMO

ABSTRACT: Surgical resection (SR) is recommended as a radical procedure in the treatment of hepatocellular carcinoma (HCC). However, postoperative recurrence negatively affects the long-term efficacy of SR, and preoperative adjuvant therapy has therefore become a research hotspot. Some clinicians adopt transcatheter arterial chemoembolization (TACE) as a preoperative adjuvant therapy in patients undergoing SR to increase the resection rate, reduce tumor recurrence, and improve the prognosis. However, the findings of the most relevant studies remain controversial. Some studies have confirmed that preoperative TACE cannot improve the long-term survival rate of patients with HCC and might even negatively affect the resection rate. Which factors influence the efficacy of preoperative TACE combined with SR is a topic worthy of investigation. In this review, existing clinical studies were analyzed with a particular focus on several topics: screening of the subgroups of patients most likely to benefit from preoperative TACE, exploration of the optimal treatment regimen of preoperative TACE, and determination of the extent of tumor necrosis as the deciding prognostic factor.


Assuntos
Carcinoma Hepatocelular , Quimioembolização Terapêutica , Neoplasias Hepáticas , Carcinoma Hepatocelular/cirurgia , Terapia Combinada , Hepatectomia , Humanos , Neoplasias Hepáticas/cirurgia , Recidiva Local de Neoplasia
2.
World J Surg Oncol ; 19(1): 249, 2021 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-34419064

RESUMO

OBJECTIVE: To retrospectively analyze the safety and long-term clinical efficacy of gelatin sponge microparticles combined with the chemotherapy drug pirarubicin for hepatic transcatheter arterial chemoembolization (GSMs-TACE) in order to treat breast cancer liver metastasis (BCLM). METHODS: Twenty-seven BCLM patients who underwent GSMs-TACE from July 2010 to July 2016 were enrolled. Tumor target blood vessels were slowly and regionally embolized with absorbable gelatin sponge particles and pirarubicin injections. Plain computed tomography (CT) scans and biochemical indexes were re-examined at 4 days after treatment, and enhanced CT scans or magnetic resonance images and biochemical indexes, 1 month later. For patients with stable tumors, the follow-up period was 2 to 3 months, and the tumor response was evaluated using Modified Response Evaluation Criteria in Solid Tumors. Adverse reactions, survival time, and prognostic factors were assessed. RESULTS: By October 2019, 27 patients with BCLM had undergone GSMs-TACE, with an average of 2.44 ± 1.58 treatments. The 1-, 3-, and 5-year survival rates were 62.96%, 22.22%, and 14.81%, respectively, and the mOS was 22.0 months. No serious complications, such as acute liver failure and liver abscess, had occurred. There were two cases of acute cholecystitis that recovered after symptomatic treatment. Multivariate analysis of the prognosis showed that the primary tumor size, number of metastatic lymph nodes, estrogen receptor/progesterone receptor (ER/PR) status, and time to postoperative liver metastasis and combination therapy were statistically significant. CONCLUSIONS: The overall prognosis of BCLM was poor. GSMs-TACE was safe and effective for BCLM treatment and could prolong the median survival time of patients. Therefore, it is worthy of widespread clinical application.


Assuntos
Neoplasias da Mama , Carcinoma Hepatocelular , Quimioembolização Terapêutica , Neoplasias Hepáticas , Neoplasias da Mama/terapia , Carcinoma Hepatocelular/terapia , Doxorrubicina/análogos & derivados , Feminino , Gelatina , Humanos , Neoplasias Hepáticas/terapia , Prognóstico , Estudos Retrospectivos
3.
BMC Cancer ; 20(1): 718, 2020 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-32746784

RESUMO

BACKGROUND: To observe the medium- and long-term clinical efficacy and safety of radioactive 125I seed implantation for refractory malignant tumours based on CT-guided 3D template-assisted technique. METHODS: Twenty-five patients with refractory malignant tumours who underwent radioactive 125I seed implantation based on CT-guided 3D template-assisted technique were selected. The post-operative adverse reactions were recorded. The number of puncture needles and particles used in the operation, dosimetric parameters, post-operative physical strength scores, and tumour response were statistically analysed. The overall survival time and survival rate were calculated, and the effect and prognosis were assessed. RESULTS: 125I seed implantation was successful in all patients without serious complications. The average number of implanted puncture needles was 17 (19.12 ± 13.00), and the median number of particles was 52 (55.12 ± 32.97). D90 in the post-operative clinical target volume (CTV) (93.24 ± 15.70 Gy) was slightly lower than that in the pre-operative CTV (93.92 ± 17.60 Gy; P > 0.05). The D90 in the post-operative planning target volume (PTV) (142.16 ± 22.25 Gy) was lower than the pre-operative PTV (145.32 ± 23.48 Gy; P > 0.05). The tumour responses at 6 months post-operatively: complete remission (CR), 20% (5/25); partial remission (PR), 48% (12/25); stable disease (SD), 24% (6/25); progressive disease (PD), 8% (2/25); CR + PR, 68% (17/25); and local control rate, 92% (23/25). The 6-, 12-, and 24-month survival rates were 100, 88, and 52%, respectively. The post-operative physical strength score (Karnofsky performance score, KPS) exhibited a gradual trend towards recovery, which rose to the highest value 12 months after implantation and then decreased slightly, but the average score was still > 90 points. There was one intra-operative pneumothorax, and two patients with superficial malignant tumours developed skin ulcerations. Multivariate analysis of prognosis showed that tumour sites and types were independent risk factors affecting survival. The number of needles and particles and template types were not the factors. CONCLUSIONS: 3D template combined with CT-guided radioactive 125I seed implantation can improve the rational distribution of radiation dose in the tumour target area because accurate radioactive 125I particle implantation was achieved. This technique has fewer complications and can further extend the overall survival and improve the quality of life. TRIAL REGISTRATION: Registration number: ChiCTR2000034566 2020/7/10 0:00:00 Retrospectively registered.


Assuntos
Braquiterapia/métodos , Radioisótopos do Iodo/administração & dosagem , Neoplasias/radioterapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Braquiterapia/efeitos adversos , Braquiterapia/instrumentação , Progressão da Doença , Feminino , Humanos , Avaliação de Estado de Karnofsky , Masculino , Pessoa de Meia-Idade , Neoplasias/mortalidade , Dosagem Radioterapêutica , Indução de Remissão , Taxa de Sobrevida , Resultado do Tratamento
4.
Heliyon ; 5(10): e02694, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31687518

RESUMO

Ginsenoside-Rg5, which is derived from high temperature-processed ginseng, exhibits beneficial health effects. In the present study, ginsenoside-Rg5 was directly and rapidly prepared through the extraction of ginseng fibrous root powder (GFRP) at atmospheric pressure. The results showed that the highest extraction yield (3.79%) was obtained under optimal conditions (extraction temperature of 85 °C, acid concentration of 0.06 mol/L, sample to solvent ratio of 1:55 g/mL and ethanol concentration of 95% after 4 h). The current method integrates the extraction of original saponins and the modification of the saponins to rare ginsenosides Rg5, which was more simpler operation, more milder preparation condition and more efficient.

5.
Chin Med J (Engl) ; 132(1): 63-68, 2019 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-30628960

RESUMO

BACKGROUND: Renal artery stenosis (RAS) is always associated with abnormalities in renal microvascular perfusion (RMP). However, few imaging methods can simultaneously evaluate the degree of luminal stenosis and RMP. Thus, this study will aim to evaluate the feasibility of using contrast-enhanced ultrasound (CEUS) for assessing both RAS and RMP to achieve a one-stop assessment of patients with suspected renovascular hypertension. METHODS: This will be a single-center diagnostic study with a sample size of 440. Patients with chronic kidney disease (CKD) and suspected of having resistant hypertension will be eligible. Patients with Stages 1-3 CKD will undergo CEUS and computed tomography (CT) angiography (CTA). Values obtained by CEUS and CTA for diagnosing low-grade (lumen reduced by <60%) and high-grade (lumen reduced by ≥60%) RAS will be compared. Moreover, all patients will also undergo radionuclide imaging. The diagnostic value for RAS will be assessed by the receiver operating characteristic curve, including the accuracy, sensitivity, specificity, positive predictive values, negative predictive values, and area under the ROC. Pearson correlation analysis will be performed to assess the association between CEUS findings for RMP and glomerular filtration rate measured by a radionuclide imaging method. CONCLUSION: The data gathered from this study will be used to evaluate the feasibility of expanding clinical applications of CEUS for evaluation of patients with suspected renovascular hypertension. TRIAL REGISTRATION: Chinese Clinical Trial Registry, ChiCTR1800016252; https://www.chictr.org.cn.


Assuntos
Hipertensão Renovascular/fisiopatologia , Obstrução da Artéria Renal/fisiopatologia , Meios de Contraste , Taxa de Filtração Glomerular/fisiologia , Humanos , Curva ROC , Artéria Renal/fisiopatologia
6.
J Cancer Res Ther ; 13(4): 642-646, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28901307

RESUMO

PURPOSE: We evaluated the clinical efficacy of gelatin sponge microparticle (GSM) -mediated chemoembolization for the treatment of patients with liver metastases following surgery for gastrointestinal tumors. MATERIALS AND METHODS: In a retrospective analysis of 37 patients who were treated at our hospital with GSM-mediated chemoembolization for liver metastases over 13 years, we evaluated outcomes using a modified response evaluation criteria in solid tumors system and also assessed liver function and adverse effects. All patients had previously undergone surgery for gastrointestinal tumors. RESULTS: Treatment produced various degrees of necrosis and shrinkage of lesions among our patients. Two patients achieved a complete response (CR), 27 showed a partial response (PR), five had stable disease, and three had progressive disease. The overall response rate (CR + PR) was 78%, and no severe adverse effects were observed. CONCLUSION: GSM-mediated chemoembolization showed good clinical efficacy in the treatment of liver metastases after gastrointestinal tumor surgery. However, larger cohort and clinical controlled studies are warranted.


Assuntos
Quimioembolização Terapêutica/métodos , Neoplasias Gastrointestinais/tratamento farmacológico , Neoplasias Hepáticas/tratamento farmacológico , Fígado/efeitos dos fármacos , Adulto , Idoso , Idoso de 80 Anos ou mais , Quimioembolização Terapêutica/efeitos adversos , Terapia Combinada , Ciclobutanos/administração & dosagem , Ciclobutanos/química , Feminino , Neoplasias Gastrointestinais/patologia , Neoplasias Gastrointestinais/cirurgia , Esponja de Gelatina Absorvível/administração & dosagem , Esponja de Gelatina Absorvível/química , Humanos , Fígado/patologia , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/secundário , Neoplasias Hepáticas/cirurgia , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Compostos Organoplatínicos/administração & dosagem , Compostos Organoplatínicos/química
7.
Medicine (Baltimore) ; 96(29): e7589, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28723799

RESUMO

To evaluate the safety and efficacy of transarterial arterial chemoembolization (TACE) with gelatin sponge particles (GSPs-TACE) and Huaier granule to treat primary hepatic carcinoma (PHC).A series of 62 patients with PHC were included between June 2009 and December 2011, and randomly assigned to a control (n = 31) or an experimental group (n = 31). The control patients received TACE with 350 to 560 µm GSPs plus lobaplatin chemotherapy. Patients in the experimental group received TACE plus Huaier granule. Treatment safety and mid-to-long-term efficacy were evaluated.Follow-up ranged from 12 to 24 months with a mean of 28.7 months. The 6- and 12-month overall survivals were 100% and 93.5% in the experimental group and 90.3% and 80.6% in control group, respectively. The difference in overall survival at 12 months was significant (χ = 5.213, P < .05), but the difference in median survival in the experimental group (20.6 months) and control group (17.1 months) patients was not significant (χ = 0.745, P > .05). The number of TACE procedures in the experimental group (2.9 ±â€Š8.7) and control group (4.1 ±â€Š7.3) patients was significantly different (χ = 7.262, P < .05). The 6-month (87.1% vs. 73.3%, χ = 5.945) and 12-month (72.4% vs. 64.3%, χ = 6.384) tumor objective response rates in the experimental and control groups were significantly different (P < .05). There were no statistically significant differences in the occurrence of treatment-related adverse reactions in the 2 groups.Transarterial chemoembolization with GSPs and Huaier granule was safe and effective for treating PHC patients.


Assuntos
Antineoplásicos/uso terapêutico , Carcinoma Hepatocelular/terapia , Quimioembolização Terapêutica , Misturas Complexas/uso terapêutico , Medicamentos de Ervas Chinesas/uso terapêutico , Idoso , Antineoplásicos/efeitos adversos , Carcinoma Hepatocelular/patologia , Quimioembolização Terapêutica/efeitos adversos , Terapia Combinada/efeitos adversos , Ciclobutanos/uso terapêutico , Medicamentos de Ervas Chinesas/efeitos adversos , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Compostos Organoplatínicos/uso terapêutico , Fatores de Tempo , Trametes , Resultado do Tratamento
8.
Medicine (Baltimore) ; 96(16): e6629, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28422858

RESUMO

To retrospectively analyze the safety and efficacy of 350-560 µm gelatin sponge particles combined with single-chemotherapy drug transcatheter arterial chemoembolization (Gs-TACE) for the treatment of elderly hepatocellular carcinoma without surgical resection.Thirty elderly hepatocellular carcinoma patients without surgical resection, who received Gs-TACE in our hospital, were selected. Slowly injected gelatin sponge particles (350-560 µm)+ 10 mg lobaplatin injection into the regional embolization tumor target vessel. The Response Evaluation Criteria for Solid Tumors could be used to evaluate the tumor response after intervention surgery.Eighty-nine times of intervention TACE were conducted on the 30 patients. The average size of tumor was 8.3 cm. The median survival time was 28 months, and the 1 and 2-year survival rates were 89% and 58%, respectively. The Response Evaluation Criteria for Solid Tumors was used to evaluate the tumor response, and found that the complete response, partial response, and OR were 30%, 56.67%, and 86.67%, respectively, at 1 month after intervention surgery. The patients were divided into groups: 60 to 65 years age group (A), >65 to 75 years age group (B), and >75 years age group (C); the median survival times were 16, 32, and 33 months, respectively, and there was statistical difference between A group, B group, and C group. The analysis of prognosis factors showed that there was statistical significance in age, Barcelona Clinic Liver Cancer stage, portal vein invasion, and alpha fetal protein (AFP), and age was the protective factor.Gelatin sponge particles (350-560 µm), combined with transcatheter arterial chemoembolization, provide an alternative method for the treatment of elderly hepatocellular carcinoma without surgical resection.


Assuntos
Antineoplásicos/administração & dosagem , Carcinoma Hepatocelular/terapia , Quimioembolização Terapêutica/métodos , Ciclobutanos/administração & dosagem , Neoplasias Hepáticas/terapia , Compostos Organoplatínicos/administração & dosagem , Idoso , Idoso de 80 Anos ou mais , Animais , Antineoplásicos/uso terapêutico , Ciclobutanos/uso terapêutico , Sistemas de Liberação de Medicamentos/métodos , Feminino , Gelatina , Humanos , Masculino , Pessoa de Meia-Idade , Compostos Organoplatínicos/uso terapêutico , Tamanho da Partícula , Poríferos/química , Estudos Retrospectivos , Taxa de Sobrevida
9.
Exp Ther Med ; 12(4): 2201-2207, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27698712

RESUMO

Spontaneous rupture of hepatocellular carcinoma hemorrhage is life-threatening. The aim of the present study was to retrospectively analyze the effect of gelatin sponge microparticles (GSMs) of various diameters on the treatment of spontaneous rupture of hepatocellular carcinoma hemorrhage. GSMs serve as embolization agents by transcatheter arterial chemoembolization (TACE), and the current study analyzed their safety and efficacy. Data from a total of 13 cases of spontaneous rupture of hepatocellular carcinoma hemorrhage, who were treated with GSM-TACE at the Affiliated Zhongshan Hospital of Dalian University (Dalian, China) between August 2010 and June 2014, were collected. Post-operative complications were classified according to the National Cancer Institute Common Terminology Criteria. Review computed tomography was conducted 1, 3 and 6 months after GSM-TACE treatment in order to determine the occurrence of re-bleeding; the tumor response was evaluated based on the Modified Response Evaluation Criteria In Solid Tumors and the expression levels of α-feroprotein. The patients were followed-up for 1-6 months (average, 5.15±1.67 months). Following GSM-TACE treatment, 13 cases reached successful hemostasis without technical complications. The survival rates 1, 3 and 6 months after treatment were 76.9 (10/13), 61.5 (8/13) and 53.8% (7/13), respectively; the objective response rates were 61.6, 53.9 and 38.5%, respectively. The primary post-operative complications were pain (100%), nausea and vomiting (69.2%), and fever (53.8%). Among the 13 patients, 2 cases underwent surgical excision 10 and 30 days after GSM-TACE, and 1 case experienced re-bleeding 3 months after treatment, after which the patient received a second treatment with TACE and successful achieved hemostasis. In conclusion, GSM-TACE of various diameters is a safe and effective method in the treatment of spontaneous rupture of hepatocellular carcinoma hemorrhage. GSM-TACE is able to achieve immediate hemostasis and improves the survival rate of patients, thus creating favorable conditions for follow-up treatment.

10.
Medicine (Baltimore) ; 94(52): e2154, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26717358

RESUMO

Gelatin sponge particles are commonly used in the conventional transarterial chemoembolization (c-TACE) as an adjuvant embolizing agent for hepatocellular carcinoma (HCC). However, there are few reports regarding the clinical applications of gelatin sponge microparticles (GSMs) as a main embolizing agent in the treatment of HCC. This retrospective study aim to evaluate the efficacy and safety of patients with Barcelona Clinic Liver Cancer (BCLC) stage B HCC treated with intra-arterial injection of 350 to 560 µm GSMs mixed with anticancer agents.Twenty-four patients with unresectable BCLC stage B HCC without any prior treatment underwent transarterial chemoembolization with gelatin sponge microparticles (GSMs-TACE) of diameter 350 to 560 µm mixed with lobaplatin. The mixture was injected into tumor-feeding arteries until the sluggish flow in selective artery. Safety was measured by assessing complication rate, and efficacy was reflected by assessing response to mRECIST therapy and overall survival. The survival rate was calculated using the Kaplan-Meier method.All 24 BCLC stage B HCC patients showed good tolerance to the procedure. The mean follow-up period was 27 months and mean number of TACE treatments per patient was 3.7 sessions (range 1-10) during the follow-up period. Postprocedure complications were mild and treated by symptomatic treatment. Six months and 1 year overall survival rates were 100% and 87.5%, respectively. Overall median survival time was 25 months (95%CI: 21.06-28.95 months).GSMs-TACE is a safe and effective method for BCLC stage B HCC patients.


Assuntos
Carcinoma Hepatocelular , Quimioembolização Terapêutica , Ciclobutanos , Gelatina , Neoplasias Hepáticas , Compostos Organoplatínicos , Poríferos , Adulto , Idoso , Animais , Antineoplásicos/administração & dosagem , Antineoplásicos/efeitos adversos , Carcinoma Hepatocelular/patologia , Carcinoma Hepatocelular/terapia , Quimioembolização Terapêutica/efeitos adversos , Quimioembolização Terapêutica/métodos , Ciclobutanos/administração & dosagem , Ciclobutanos/efeitos adversos , Feminino , Gelatina/administração & dosagem , Gelatina/efeitos adversos , Humanos , Injeções Intra-Arteriais , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/terapia , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Compostos Organoplatínicos/administração & dosagem , Compostos Organoplatínicos/efeitos adversos , Estudos Retrospectivos , Análise de Sobrevida
11.
Ying Yong Sheng Tai Xue Bao ; 26(5): 1587-93, 2015 May.
Artigo em Chinês | MEDLINE | ID: mdl-26571681

RESUMO

The pothole is one of the special habitats in river ecosystems, which is simply structured, well-defined, food chain-short, and easily controlled, thus making it a model system in ecological, evolutionary and phenological studies. Here we first reviewed hydrological, chemical and physical characteristics of potholes, their biological community (biodiversity, environmental factors) as well as food chain (competition, predation and parasitism) in mountain rivers. The differences between pothole ecosystems and river ecosystems in hydrological characteristics, biological community and food-chain were analyzed. Hydrological, physical chemical, and ecological characteristics of potholes were largely unexplored in China. Finally, we suggested future directions and recommendations in pothole ecosystems.


Assuntos
Ecossistema , Cadeia Alimentar , Rios , Biodiversidade , China , Hidrologia
12.
Ying Yong Sheng Tai Xue Bao ; 26(9): 2835-42, 2015 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-26785569

RESUMO

Hyporheic macroinvertebrates are an important component of stream ecosystem. The composition and distribution of the hyporheic macroinvertebrates were investigated using artificial substrates in the upper reaches of Heishuitan River in August, December 2013 and April 2014. The results indicated that a total of 27 microinvertbrate species were identified in all three seasons. In summer, 22 species were identified, accounting for 81.8% of aquatic insects. 16 species were identified both in winter and spring, accounting for 75.0% and 62.5% of aquatic insects, respectively. The density of macroinvertebrate assemblage was significantly lower in summer than in winter and spring, and was the highest in spring. The biomass of macroinvertebrate assemblage was significantly higher in winter than in summer and spring, and was the lowest in summer. Species richness, Shannon index and Pielou index all had no significant difference among the three seasons. The density and richness of macroinvertebrates decreased with bed depth, and the maximum invertebrate density was found within the top 20 cm of the stream bed. Collector-filterer and collector-gatherer were the dominant functional feeding group in all three seasons. The community structure and temporal-spatial distribution of macroinvertebrates were determined by interactions and life history strategy of macroinvertebrates, and physical-chemical factors of hyporheic zone.


Assuntos
Biota , Ecossistema , Invertebrados , Rios , Animais , Biomassa , China , Insetos , Estações do Ano
13.
Tumour Biol ; 35(11): 10905-10, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25085588

RESUMO

The objective of this study is to investigate pharmacokinetics of gelatin sponge microparticles (GSMs) combined with epirubicin in a rabbit VX2 liver tumor model of hepatic arterial chemoembolization (TACE). Eighteen successful models of VX2 in New Zealand white rabbits was established, which were divided into three groups randomly: HAI group (n = 6), the epirubicin solution (epirubicin 10 mg mixed with saline 10 ml into the hepatic artery); GSMs-TACE group (n = 6), GSMs (20 mg) mixed with epirubicin solution (1 mg/ml); c-TACE group (n = 6), epirubicin (10 mg) mixed with lipiodol (10 ml). Each rabbit was administrated epirubicin at dose adjusted for a 1 mg/kg. Samples were collected from femoral vein at 5, 10, 20, 30, 40, 60, 90, and 120 min after therapy after 120 min; rabbit was killed, and tumor and peritumoral normal liver tissue was cised. Epirubicin concentrations in plasma and tumor were measured. The epirubicin concentration in plasma was significantly lower in GSMs-TACE group than in HAI group. C max in there groups after administration was 28.77 ± 7.15 µg/ml in c-TACE group, 83.84 ± 32.28 µg/ml in GSMs-TACE group, and 238.46 ± 23.44 µg/ml in HAI group at 5 min, respectively. The epirubicin concentration in tumor tissue was 53.06 ± 16.9 µg/g in c-TACE group, 44.49 ± 16.80 µg/g in the GSMs-TACE group, and 18.32 ± 8.30 µg/g in HAI group, respectively. Epirubicin concentration of GSMs-TACE group was significantly higher than that of HAI group (P < 0.05). The area under the curve (AUC) at 0-120 min in c-TACE, GSMs-TACE, and HAI groups were 1,815 ± 889.88, 3,416 ± 799.90, and 11,899 ± 2,717.17 µg min/ml, respectively. The AUC was lower in GSMs-TACE group than in HAI group (P < 0.05). Compared with HAI, GSMs-TACE has higher epirubicin concentrations in tumor and lower concentrations in plasma. The results show that GSMs-TACE has a feature of slow drug release-it may be one of the mechanisms of GSMs-TACE for HCC.


Assuntos
Antibióticos Antineoplásicos/farmacocinética , Quimioembolização Terapêutica , Portadores de Fármacos , Epirubicina/farmacocinética , Esponja de Gelatina Absorvível/farmacocinética , Artéria Hepática , Neoplasias Hepáticas Experimentais/terapia , Animais , Antibióticos Antineoplásicos/administração & dosagem , Cromatografia Líquida , Epirubicina/administração & dosagem , Feminino , Esponja de Gelatina Absorvível/administração & dosagem , Neoplasias Hepáticas Experimentais/irrigação sanguínea , Neoplasias Hepáticas Experimentais/patologia , Coelhos , Espectrometria de Massas em Tandem
14.
Ying Yong Sheng Tai Xue Bao ; 25(11): 3357-65, 2014 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-25898637

RESUMO

The stream hyporheic zone is an ecotone of surface water-ground water interactions, which is rich in biodiversity, and is an important component of stream ecosystem. The macroinvertebrates, which are at the top of food webs in the hyporheic zone to directly influence the matter and energy dynamics of the hyporheic zone, and are potential indicators of river ecological health to adjust the function of environment purification and ecological buffer. The macroinvertebrates in the hyporheic zone are divided into three categories: stygoxenes, stygophiles and stygobites. The key factors which influenced macroinvertebrates distribution in the hyporheic zone are physical size of interstitial spaces, interstitial current velocity, dissolved oxygen (DO), water temperature, available organic matter, hydraulic conductivity and hydraulic retention time. A suitable sampling method should be used for diverse research purposes in the special ecological interface. In the future, some necessary researches should focus on the life-history and life history strategy of the macroinvertebrates in the hyporheic zone, the quantitative analysis on the matter and energy dynamics in the ecological system of stream, the assessment systems of river ecological health based on the macroinvertebrates of the stream hyporheic zone, and the ecological significance of the hyporheic zone as a refuge for distribution and evolution of the macroinvertebrates.


Assuntos
Invertebrados/classificação , Rios , Animais , Biodiversidade , Ecologia , Cadeia Alimentar , Água Subterrânea , Oxigênio/química , Temperatura , Água/química , Movimentos da Água
16.
Anal Bioanal Chem ; 405(16): 5549-55, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23657446

RESUMO

The recognition of targets such as biomacromolecules, viruses and cells by their aptamers is crucial in aptamer-based biosensor platforms and research into protein function. However, it is difficult to evaluate the binding constant of aptamers and their targets that are hard to purify and quantify, especially when the targets are undefined. Therefore, we aimed to develop a modified capillary electrophoresis based method to determine the dissociation constant of aptamers whose targets are hard to quantify. A protein target, human thrombin, and one of its aptamers were used to validate our modified method. We demonstrated that the result calculated by our method, only depending on the aptamer's concentrations, was consistent with the classical method, which depended on the concentrations of both the aptamers and the targets. Furthermore, a series of DNA aptamers binding with avian influenza virus H9N2 were confirmed by a four-round selection of capillary electrophoresis-systematic evolution of ligands by exponential enrichment, and we identified the binding constant of these aptamers by directly using the whole virus as the target with the modified method. In conclusion, our modified method was validated to study the interaction between the aptamer and its target, and it may also advance the evaluation of other receptor-ligand interactions.


Assuntos
Aptâmeros de Nucleotídeos/metabolismo , Eletroforese Capilar/métodos , Vírus da Influenza A Subtipo H9N2/metabolismo , Trombina/metabolismo , Sequência de Bases , Técnicas Biossensoriais/métodos , Humanos , Dados de Sequência Molecular , Reprodutibilidade dos Testes
17.
Environ Sci Pollut Res Int ; 20(10): 7092-102, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23296972

RESUMO

For flood control purpose, the water level of the Three Gorges Reservoir (TGR) varies significantly. The annual reservoir surface elevation amplitude is about 30 m behind the dam. Filling of the reservoir has created about 349 km(2) of newly flooded riparian zone. The average flooding period lasts for more than 6 months, from mid-October to late April. The dam and its associated reservoir provide flood control, power generation, and navigation, but there are also many environmental challenges. The littoral zone is the important part of the TGR, once its eco-health and stability are damaged,which will directly endanger the ecological safety of the whole reservoir area and even the Yangtze River Basin. So, understanding the great ecological opportunities which are hidden in littoral zone of TGR (LZTGR) and putting forward approaches to solve the environmental problems are very important. LZTGR involves a wide field of problems, such as the landslides, potential water pollution, soil erosion, biodiversity loss, land cover changes, and other issues. The Three Gorges dam (TGD) is a major trigger of environmental change in the Yangtze River. The landslides, water quality, soil erosion, loss of biodiversity, dam operation, and challenge for land use are closely interrelated across spatial and temporal scales. Therefore, the ecological and environmental impacts caused by TGD are necessarily complex and uncertain. LZTGR is not only a great environmental challenge but also an ecological opportunity for us. In fact, LZTGR is an important structural unit of TGR ecosystem and has special ecosystem services function. Vegetation growing in LZTGR is therefore a valuable resource due to accumulation of carbon and nutrients. Everyone thinks that the ecological approach to the problem is needed. If properly designed, dike-pond systems, littoral woods systems, and re-created waterfowl habitats will have the capacity to capture nutrients from uplands and obstruct soil erosion. Ecological engineering approaches can therefore reduce environmental impacts of LZTGR and optimize ecological services. In view of the current situation and existing ecological problems of LZTGR, according to function demands such as environmental purification, biodiversity conservation, and vegetation carbon sink enhancement, we should explore the eco-friendly utilization mode of resources in LZTGR. Ecological engineering approaches might minimize the impacts or optimize the ecological services. Natural regeneration and ecological restoration in LZTGR are valuable for soil erosion decrease, pollutant purification, biodiversity conservation, carbon sink increase, and ecosystem health maintenance in TGR.


Assuntos
Conservação dos Recursos Naturais/métodos , Ecossistema , Rios/química , Biodiversidade , Carbono , China , Inundações , Fenômenos Geológicos , Plantas/classificação , Solo/química , Poluição da Água/análise , Poluição da Água/estatística & dados numéricos , Qualidade da Água
18.
Nanoscale ; 4(24): 7780-5, 2012 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-23138761

RESUMO

Porous BiOCl micro-flowers constructed from ultrathin nanosheets with nearly 100% {001} facets exposed were selectively prepared. The exposed {001} facets terminated with a high density of oxygen atoms and are not only favorable for the adsorption of the cationic dye RhB but also can accumulate the photogenerated electrons injected from excited RhB. These electrons can be captured by O(2) and transformed to reactive oxygen species, which possess a strong photooxidative ability to degrade the dye pollutants directly and easily. Therefore, the resultant BiOCl photocatalysts exhibit superior activity for indirect dye photosensitization degradation under visible light, with a rapid degradation rate and high photostability.


Assuntos
Bismuto/química , Nanoestruturas/química , Oxirredução , Fotólise , Porosidade , Espécies Reativas de Oxigênio/química , Rodaminas/química
19.
Zhonghua Wai Ke Za Zhi ; 41(5): 336-9, 2003 May.
Artigo em Chinês | MEDLINE | ID: mdl-12892585

RESUMO

OBJECTIVE: To discuss the role of nitric oxide (NO) in lung injury associated with acute necrotizing pancreatitis (ANP). METHODS: One hundred and twenty SD rats were randomized into five groups: control group, ANP group, L-arginine (L-arg) pretreatment group, L-NAME pretreatment group, and mixed pretreatment group (n = 24 for each group). Rat ANP model was induced by intraductal administration of 3% sodium taurocholate. Alveolar macrophages (AMs) were obtained by bronchoalveolar lavage. The protein content of bronchoalveolar lavage fluids (BALF), the myeloperoxidase (MPO) of lung tissue and generation of tumor necrosis factor alpha (TNFalpha)and NO by alveolar macrophages were evaluated. The expression of TNFalpha mRNA and iNOS mRNA was also measured. RESULTS: Lung injury was aggravated gradually with progression of the disease. The level of MPO of lung tissue and the protein content of BALF showed a steady increase with time and peaked at the 12(th) hour (10.8 +/- 0.6 U/g for MPO and 2,011.0 +/- 105.5 micro g/ml for protein, respectively). TNFalpha and NO secreted by AMs were elevated gradually and peaked at the 6(th) hour (1,624.2 +/- 149.2 pg/ml and 88.8 +/- 6.5 micro mol/L respectively) but decreased at the 12(th) hour. The expression of TNFalpha mRNA and iNOS mRNA was similar with the change of TNFalpha and NO. The parameters of the groups of L-arg, L-NAME and the mixed pretreatment were similar to those of ANP group. The parameters compared with those of the control group showed a significant difference (P < 0.05). The parameters of groups of L-Arg and L-NAME pretreatment in comparison with those of the ANP group showed significant difference (P < 0.05). CONCLUSIONS: Over production of NO mediated by iNOS aggravates lung injury caused by acute necrotizing pancreatitis. Administration of exogenous NOS substrate would worsen lung injury, whereas administration NOS inhibitor would alleviate lung injury.


Assuntos
Lesão Pulmonar/fisiopatologia , Óxido Nítrico/fisiologia , Pancreatite Necrosante Aguda/fisiopatologia , Animais , Arginina/farmacologia , Modelos Animais de Doenças , Inibidores Enzimáticos/farmacologia , Feminino , Histocitoquímica , Pulmão/efeitos dos fármacos , Pulmão/metabolismo , Pulmão/patologia , Lesão Pulmonar/etiologia , Macrófagos Alveolares/efeitos dos fármacos , Macrófagos Alveolares/metabolismo , Macrófagos Alveolares/patologia , Masculino , NG-Nitroarginina Metil Éster/farmacologia , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo II/antagonistas & inibidores , Óxido Nítrico Sintase Tipo II/genética , Óxido Nítrico Sintase Tipo II/metabolismo , Pancreatite Necrosante Aguda/complicações , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Fator de Necrose Tumoral alfa/genética , Fator de Necrose Tumoral alfa/metabolismo
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