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1.
Oncotarget ; 8(53): 90796-90807, 2017 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-29207604

RESUMO

Dog allergy is common worldwide. However, the allergenicity of dog allergy is still unclear in China as well as in special group, such as children. In this study, we chose Can f 6, a major dog allergen which belongs to the lipocalin to study its allergenicity in Chinese dog allergic children. Can f 6 gene was subcloned into pET-28a vector and transformed into E. coli BL21 (DE3) cells for expression. The recombinant Can f 6 was purified by nickel affinity chromatography, identified by SDS-PAGE, and tested for its allergenicity by Western blot with sera and basophil activation test. Secondary structures, B cell epitopes and homology modeling of Can f 6 were predicted by using a series of bioinformatical approaches. And the verification of B cell epitopes was detected by ELISA. The recombinant allergen showed an explicit band with the molecular weight of 20 kDa by SDS-PAGE. Sera from 56.3 % (18/32) of dog-allergic children patients reacted with Can f 6. The induction of the expression of CD63 and CCR3 of dog allergic children in passively sensitized basophils was up to approximately 5.0 times higher than healthy subjects. The secondary structure of Can f 6 contains 3 α-helices, 9 ß-sheets and random coils. Five B cell epitopes of Can f 6 were predicted and were confirmed successfully by ELISA. The results showed Can f 6 is a major allergen in Chinese children, which provides a basis for further study of Can f 6 in diagnosis and treatment of symptoms in children in China. The structural information of Can f 6 will help to form a foundation for the future design of vaccines and therapies for Can f 6 related allergies.

2.
Medicine (Baltimore) ; 96(51): e9428, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29390571

RESUMO

BACKGROUND: The multidrug resistance gene 1(MDR1) C3435T polymorphism has been reported to be associated with colorectal cancer (CRC) risk in Asians, however the results were inconsistent. Thus, we performed a meta-analysis to generate large-scale evidence on the association between C3435T polymorphism and CRC risk in Asian populations. METHODS: The PubMed, Web of Science, Embase, CNKI, and Chinese Biomedicine databases were searched up to January 15, 2017. The odd ratios (ORs) and 95% confidence intervals (95% CIs) were calculated by a fixed-effects or random-effects model. Sensitivity and cumulative meta-analysis were also performed. RESULTS: A total of 7 studies involving 4818 individuals were included in this pooled-analysis. The results suggested that persons carrying a T allele at the C3435T polymorphism had a significantly decreased risk of CRC in Asian population (T vs C: OR = 0.897, 95%CI = 0.826-0.975, P = .01), and the significant association was also observed in another 2 genetic models (TT vs CC: OR = 0.721, 95%CI = 0.605-0.861, P < .001; TT vs TC+CC: OR = 0.679, 95%CI = 0.579-0.795, P < .001). Moreover, the results of sensitivity and cumulative meta-analysis indicated the stable of our results. Finally, funnel plot and Egger's test showed no evidence of publication bias. CONCLUSIONS: In summary, this meta-analysis provided evidence that MDR1 C3435T polymorphism is associated with a decreased risk of CRC in Asian population.


Assuntos
Neoplasias Colorretais/genética , Predisposição Genética para Doença/genética , Polimorfismo de Nucleotídeo Único/genética , Subfamília B de Transportador de Cassetes de Ligação de ATP/genética , Grupo com Ancestrais do Continente Asiático/genética , Grupo com Ancestrais do Continente Asiático/estatística & dados numéricos , Humanos , Fatores de Risco
3.
PLoS One ; 11(1): e0147554, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26800211

RESUMO

BACKGROUND: Bone metastases often occur in the majority of patients with advanced cancer, such as prostate cancer, lung cancer and breast cancer. Serum tartrate-resistant acid phosphatase 5b (TRACP 5b), a novel bone resorption marker, has been used gradually in the clinics as a specific and sensitive marker of bone resorption for the early diagnosis of cancer patients with bone metastasis. Here, we reported that high concentrations of uric acid (UA) lead to decrease of TRACP 5b levels and determined whether TRACP 5b level was associated with UA in interference experiment. METHODS: A total of 77 patients with high concentrations of UA and 77 healthy subjects were tested to evaluate the differences in their TRACP 5b levels. Serial dilutions of UA were respectively spiked with a known concentration of TRACP 5b standard sample, then Serum TRACP 5b was detected by using bone TRAP® Assay. A correction equation was set to eliminate UA-derived TRACP 5b false-decrease. The effect of this correction was evaluated in high-UA individuals. RESULTS: The average TRACP level of the high-UA individuals (1.47 ± 0.62 U/L) was significantly lower than that of the healthy subjects (2.62 ± 0.63 U/L) (t-test, p < 0.0001). The UA correction equation derived: ΔTRACP 5b = -1.9751lgΔUA + 3.7365 with an R2 = 0.98899. Application of the UA correction equation resulted in a statistically non-significant difference in TRACP 5b values between the healthy subjects and high-UA individuals (p = 0.24). CONCLUSIONS: High UA concentrations can falsely decrease TRACP 5b levels due to a method-related systematic error. To avoid misdiagnoses or inappropriate therapeutic decisions, increased attention should be paid to UA interference, when TRACP 5b is used for early diagnosis of cancer patients with bone metastasis, evaluation of the aggressiveness of osteosarcoma or prediction of survival in prostate cancer and breast cancer with bone metastases.


Assuntos
Fosfatase Ácida/sangue , Isoenzimas/sangue , Ácido Úrico/sangue , Adolescente , Adulto , Idoso , Biomarcadores Tumorais/sangue , Neoplasias Ósseas/sangue , Reabsorção Óssea/sangue , Estudos de Casos e Controles , Reações Falso-Negativas , Feminino , Humanos , Imunoensaio , Masculino , Pessoa de Meia-Idade , Neoplasias/sangue , Neoplasias/diagnóstico , Fosfatase Ácida Resistente a Tartarato , Adulto Jovem
4.
J Hum Evol ; 73: 58-63, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25053189

RESUMO

The fluvio-lacustrine sequences in the Nihewan Basin, northern China provide an important source of Paleolithic settlements and therefore early human occupation in the eastern Old World. Here we present electron spin resonance (ESR) chronology for the Majuangou (MJG-III, MJG-II and MJG-I) and Banshan (BS) Paleolithic sites in this basin by the quartz Ti-Li center ESR dating. Results show that the ages of MJG-III and MJG-II could be estimated to be ∼1.70 Ma (millions of years ago); of MJG-I, ∼1.40 Ma; and BS, ∼1.35 Ma. This ESR chronology is consistent with the previous magnetochronology, thus providing strong support for the earliest human presence at the high northern latitudes of Northeast Asia.


Assuntos
Arqueologia , Cronologia como Assunto , Hominidae , Animais , China , Espectroscopia de Ressonância de Spin Eletrônica
5.
Nan Fang Yi Ke Da Xue Xue Bao ; 31(6): 1069-71, 2011 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-21690072

RESUMO

OBJECTIVE: To establish a chromatography-based method for simultaneous analysis of the concentrations of amoxicillin and clavulanate potassium in human blood. METHODS: With paracetamol as the internal control, human plasma samples, after treatment with methanol for protein sedimentation and centrifugation, were loaded for analysis with high-performance liquid chromatography (HPLC). HPLC analysis was carried out using a C18 column (5 µm, 4.6 mm×150 mm) with the mobile phase of acetonitrile-PBS (0.05 mol/L) of 10:90 (pH 2.3), UV detection wavelength of 220 nm, flow rate of 1.0 ml/min, and column temperature of 25 degrees celsius;. RESULTS: The retention time of acetaminophen for potassium clavulanate, amoxicillin sodium and the internal control was 5.3, 7.2, and 8.5 min, respectively, and no interference by the endogenous impurities in the plasma samples was found. Amoxicillin sodium showed a good linearity within the concentration range of 0.52-4.16 µg/ml (r(2)=0.9996), and potassium clavulanate had a good linearity within the range of 0.266-2.14 µg/ml (r(2)=0.9998). The minimum detectable concentrations of amoxicillin sodium and potassium clavulanate were 0.065 µg/ml and 0.066 µg/ml, respectively. The relative recoveries of amoxicillin sodium were 95.9%-96.5% (n=5), and those of clavulanate potassium were 92.5%-98.8% (n=5); the intra- and inter-day RSD of amoxicillin sodium was 1.84%-6.4% and 2.1%-7.8%, as compared to that of potassium clavulanate of 3.57%-8.6% and 1.8%-9.1%, respectively. CONCLUSION: This method is simple, accurate, sensitive, specific and reproducible for analyzing the concentrations of amoxicillin and clavulanate potassium simultaneously in human plasma.


Assuntos
Amoxicilina/sangue , Cromatografia Líquida de Alta Pressão/métodos , Ácido Clavulânico/sangue , Estabilidade de Medicamentos , Humanos
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