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1.
Inorg Chem ; 2021 Apr 08.
Artigo em Inglês | MEDLINE | ID: mdl-33829775

RESUMO

Two NIR luminescent Zn(II)/Cd(II)-Yb(III) complexes were obtained by the use of a Schiff base ligand with a binaphthyl backbone. Cd(II)-Yb(III) complex 2 has a triangular structure and exhibits interesting luminescent sensing activity to antibiotics, in particular to ciprofloxacin (CPFX) and norfloxacin (NFX) due to the inner filter effect. The limits of the detection of 2 to CPFX and NFX are 0.18 and 0.36 µM, respectively, and the fluorescence sensitivity is not changed with the existence of other antibiotics tested in this study.

3.
Plant Biotechnol J ; 2021 Feb 04.
Artigo em Inglês | MEDLINE | ID: mdl-33539631

RESUMO

Artemisinin, a sesquiterpene lactone widely used in malaria treatment, was discovered in the medicinal plant Artemisia annua. The biosynthesis of artemisinin is efficiently regulated by jasmonate (JA) and abscisic acid (ABA) via regulatory factors. However, the mechanisms linking JA and ABA signalling with artemisinin biosynthesis through an associated regulatory network of downstream transcription factors (TFs) remain enigmatic. Here we report AaTCP15, a JA and ABA dual-responsive teosinte branched1/cycloidea/proliferating (TCP) TF, which is essential for JA and ABA-induced artemisinin biosynthesis by directly binding to and activating the promoters of DBR2 and ALDH1, two genes encoding enzymes for artemisinin biosynthesis. Furthermore, AaORA, another positive regulator of artemisinin biosynthesis responds to JA and ABA, interacts with and enhances the transactivation activity of AaTCP15 and simultaneously activates AaTCP15 transcripts. Hence, they form an AaORA-AaTCP15 module to synergistically activate DBR2, a crucial gene for artemisinin biosynthesis. More importantly, AaTCP15 expression is activated by the multiple reported JA and ABA-responsive TFs that promote artemisinin biosynthesis. Among them, AaGSW1 acts at the nexus of JA and ABA signalling to activate the artemisinin biosynthetic pathway and directly binds to and activates the AaTCP15 promoter apart from the AaORA promoter, which further facilitates formation of the AaGSW1-AaTCP15/AaORA regulatory module to integrate JA and ABA-mediated artemisinin biosynthesis. Our results establish a multilayer regulatory network of the AaGSW1-AaTCP15/AaORA module to regulate artemisinin biosynthesis through JA and ABA signalling, and provide an interesting avenue for future research exploring the special transcriptional regulation module of TCP genes associated with specialized metabolites in plants.

4.
Artigo em Inglês | MEDLINE | ID: mdl-33593833

RESUMO

Two novel ISCR1-associated dfr genes, dfrA42 and dfrA43, were identified from trimethoprim (TMP)-resistant Proteus strains and were shown to confer high level TMP resistance (MIC ≥ 1024 mg/L) when cloned into Escherichia coli These genes were hosted by complex class 1 integrons suggesting their potentials for dissemination. Analysis of enzymatic parameters and TMP affinity were performed, suggesting that the mechanism of TMP resistance for these novel DHFRs is the reduction of binding with TMP.

5.
BMC Pregnancy Childbirth ; 21(1): 21, 2021 Jan 06.
Artigo em Inglês | MEDLINE | ID: mdl-33407256

RESUMO

BACKGROUND: The association between gestational diabetes mellitus (GDM) and childhood body weight remains controversial, and additional study is needed, especially in Asian populations. METHODS: This prospective study investigated the association between maternal glucose concentration, and GDM status and infant body weight from birth to 12 months of age. Linear mixed effects (LME) models and multiple linear regression were used to assess the longitudinal association of GDM with infant growth measured by weight-for-length z-scores (WFLZ), weight-for-age z-scores (WFAZ), and length-for-age z-scores (LFAZ) at birth, 1, 3, 6, 8, and 12 months of age. RESULTS: Offspring born to mothers with GDM had higher WFLZ [ß: 0.26 SD units (95% CI: 0.13-0.40)] across infancy than those of mothers without GDM. When stratified analysis by maternal pre-pregnancy body mass index (BMI) status, the association was pronounced in normal-weight [ß:0.28 SD units (95% CI: 0.11-0.45)] and overweight/obese women [ß: 0.34 SD units (95% CI: 0.09-0.58)] but not in underweight women (P for interaction < 0.05). Multiple linear regression found that the effect estimate of GDM on infant WFLZ was highest at birth [ß: 0.36 SD units (95% CI: 0.11-0.61)], remained significant at 1 [ß: 0.22 SD units (95% CI: 0.03-0.41)] and 3 [ß:0.19 SD units (95% CI: 0.01-0.37)] months of age and decreased across infancy. Maternal GDM status was not associated with infant WFAZ or LFAZ. CONCLUSIONS: Maternal GDM status was associated with infant WFLZ, but not WFAZ or LFAZ. The association between GDM status and offspring WFLZ was more pronounced in early infancy or in normal-weight and overweight/obese women. Increased public health efforts to prevent GDM in normal-weight and overweight/obese pre-pregnancy mothers are recommended to control offspring overweight or obesity.

6.
Future Oncol ; 17(13): 1637-1652, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33478265

RESUMO

Objective: The target of this work was to analyze the clinical characteristics and construct nomograms to predict prognosis in patients with cervical adenosquamous carcinoma (ASC). Methods: A total of 788 ASC patients were tracked in the Surveillance, Epidemiology and End Results database. We compared the clinical characteristics and prognostic factors of ASC. Cox regression models were established, and nomograms were constructed and verified. Results: ASC patients have lower age levels and higher histological grades than patients with squamous cell carcinoma. Nomograms were constructed with good consistency and feasibility in clinical practice. The C-indices for overall survival and cancer-specific survival were 0.783 and 0.787, respectively. Conclusion: ASC patients have unique clinicopathological and prognostic characteristics. Nomograms were successfully constructed and verified.

7.
Cancer Epidemiol Biomarkers Prev ; 30(4): 789-796, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33514605

RESUMO

BACKGROUND: We prospectively examined the extent to which greater inflammatory and insulinemic potential of diet and lifestyle are associated with the risk of developing hepatocellular carcinoma (HCC) in two nationwide cohorts. METHODS: Five kinds of pattern scores, including the empirical dietary inflammatory pattern (EDIP), empirical dietary index for hyperinsulinemia (EDIH) and insulin resistance (EDIR), empirical lifestyle pattern score for hyperinsulinemia (ELIH) and insulin resistance (ELIR) were calculated. Multivariable hazard ratios (HR) and 95% confidence intervals (CI) were estimated using Cox regression. RESULTS: After an average follow-up of 25.6 years among 119,316 participants, 142 incident HCC cases were documented. Higher adherence to EDIP (HR by comparing extreme tertiles: 2.03; 95% CI, 1.31-3.16; P trend = 0.001), EDIH (HR, 1.61; 95% CI, 1.06-2.43; P trend = 0.02), and EDIR (HR, 1.62; 95% CI: 1.08-2.42; P trend = 0.02) was associated with increased risk of HCC. Likewise, participants with higher scores of ELIH (HR, 1.89; 95% CI, 1.25-2.87; P trend = 0.001) and ELIR (HR, 2.05; 95% CI, 1.34-3.14, P trend = 0.0004) had higher risk of developing HCC. Additional adjustment for diabetes mellitus and/or body mass index attenuated the magnitude of the associations, indicating that diabetes and/or adiposity may partly mediate the association of these patterns with HCC risk. CONCLUSIONS: Our findings suggest that inflammation and insulin resistance/hyperinsulinemia are potential mechanisms linking dietary or lifestyle factors and HCC development. IMPACT: Inflammation and insulin resistance/hyperinsulinemia may partly mediate the association of diet and other lifestyles with HCC development, and interventions to reduce the adverse effect of pro-inflammatory and hyperinsulinemic diet and lifestyle may reduce HCC risk.

8.
J Phys Chem A ; 2021 Jan 04.
Artigo em Inglês | MEDLINE | ID: mdl-33390013

RESUMO

Two d-4f complexes [Zn2NdL2(OAc)2]·OH (1) and [Cd3Sm3L3(OAc)6(OH)3] (2) with a designed Schiff base ligand N,N'-bis(3-methoxysalicylidene)(binaphthyl)-1,4-diamine (H2L) were synthesized. The Schiff base ligands coordinate with metal ions by µ2(η1:η2:η1:η1:η2:η1) and µ2(η1:η2:η1:η1:η2:η1) modes in the complexes, which show typical lanthanide emissions. The triangular Cd-Sm complex 2 shows both visible and NIR luminescent responses to nitrobenzene explosive 2,4,6-trinitrophenol (PA).

9.
Arch Gerontol Geriatr ; 92: 104227, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32979552

RESUMO

OBJECTIVES: Little is known about the magnitude of catastrophic health expenditure (CHE) attributable to critical disease, especially in the middle-aged and elderly population. This research aimed to exploring the key aspects of how the health insurance fails to protect the middle-aged and elderly against CHE in the past five years. And propose corresponding measures to improve. METHODS: Data were obtained from the 2011 to 2015 China Health and Retirement Longitudinal Study. The method was adapted from WHO to calculate the catastrophic health expenditure (CHE) and impoverishment by medical expense (IME), and use Generalized Linear Mixed Models (GLMMs) to comprehensively analyze the risk factors that cause middle-aged and elderly people to fall into CHE. RESULTS: The incidence of CHE of China's middle-aged and elderly population has been rose in the five years from 2011 (10.5 %) to 2013 (17.5 %) to 2015 (19.7 %). The CHE of richest families was almost 6 times from 2011 to 2015. Urban Employee Medical Insurance Scheme, the incidence of CHE was up 10 percentage from 2011 to 2015. According to the GLMMs, families have inpatient cares as the most important factor to CHE. The incidence of CHE increased by 2.25 times compared with those who did not use inpatient services. CONCLUSIONS: The health system needs to control the irrational growth of health expenses and reduce residents' overuse of health services. Government should take supplementary measures to comprehensively strengthen the advantages of health insurance. Raise residents' awareness of health care, enhance citizens' physical fitness, and avoid unnecessary waste of health resources.


Assuntos
Gastos em Saúde , Seguro Saúde , Idoso , China/epidemiologia , Serviços de Saúde , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade
10.
Front Endocrinol (Lausanne) ; 11: 586440, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33329392

RESUMO

Background: Complement C1q (C1q) has been confirmed to be related to obesity, metabolic syndrome (MetS), and its components. However, human data regarding the associations are relatively scarce. This study aimed to investigate associations of C1q with obesity as well as MetS in Chinese adolescents. Methods: A total of 1,191 Chinese adolescents aged 13-18 years were enrolled in this study. The biochemical and anthropometric variables of all the subjects were evaluated using standardized procedures. C1q was measured using the immunoturbidometric assay. The relationship between C1q and obesity or MetS was analyzed using multiple regression analyses. Results: Obesity was more prevalent among participants in the highest tertile than in the lowest tertile of C1q levels. The highest tertile of C1q was related to a greater effect on the risk of MetS, and its trend test was statistically significant. Except for hyperglycemia, the prevalence of other components of MetS significantly increased relative to an increase in C1q tertile. Receiver operating characteristic (ROC) curve analysis of C1q for predicting adolescents with MetS illustrated that the area under the curve (AUC) was 0.82 [95% confidence interval (CI): 0.76, 0.88; P<0.001] in the total population after adjusting for confounders. Conclusions: This study observed a significantly higher prevalence of obesity and MetS features in adolescents with high C1q. The findings of the current study also reported a significant relationship between C1q levels and MetS components [except for fasting plasma glucose (FPG)] in Chinese adolescents. C1q may represent a biomarker for predicting obesity or MetS in adolescents.

12.
Inorg Chem ; 59(23): 16809-16813, 2020 Dec 07.
Artigo em Inglês | MEDLINE | ID: mdl-33225699

RESUMO

One 12-metal Cd(II)-Yb(III) nanoring, [Cd8Yb4L8(OAc)8]·4OH (1), with a size of 1.2 × 2.8 × 2.8 nm was obtained from a designed flexible salen-type ligand that has eight coordination sites (O and N atoms). The near-IR emission of Yb(III) at 983 nm was detected upon the excitation of ligand-central absorption at 386 nm. This Cd(II)-Yb(III) nanoring exhibits high sensitivity to nitrofuran antibiotics (NFAs) even in the presence of other antibiotics. The quenching constants and limits of detection of NFAs are 2.5 × 104-4.5 × 104 M-1 and 1.5-2.8 µM, respectively.

13.
Inorg Chem ; 59(23): 17608-17613, 2020 Dec 07.
Artigo em Inglês | MEDLINE | ID: mdl-33226799

RESUMO

One 18-metal Nd(III) nanoring, [Nd18(L1)8(HL2)2(OAc)20(MeOH)8(EtOH)6(H2O)4]·2(MeOH)·6(H2O) (1), was constructed by the use of a hexadentate Schiff base ligand. For 1, the near-infrared (NIR) luminescence of Nd(III) was detected under the excitation of absorption band at 371 nm. The study of luminescent sensing properties exhibits that, even with the existence of other antibiotics, this Nd(III) nanoring displays high sensitivity and selectivity to nitrofuran antibiotics (NFAs). The luminescence quenching constants and limits of detection of 1 to NFAs are found to be 1.4 × 104 to 3.5 × 104 M-1 and 0.9-2.2 µM, respectively.

14.
J Exp Bot ; 2020 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-33165526

RESUMO

Glandular secreting trichomes (GSTs) synthesize and secrete large quantities of secondary metabolites, some of which have well-established commercial value. An example is the anti-malarial compound artemisinin, which is synthesized in the GSTs of Artemisia annua. Accordingly, there is considerable interest in understanding the processes that regulate GST density as a strategy to increase artemisinin production. In this study we identified a GST-specific WRKY transcription factor from A. annua, AaGSW2, which is positively regulated by the direct binding of the homeodomain proteins AaHD1 and AaHD8 to the L1-box of the AaGSW2 promoter. Overexpression of AaGSW2 in A. annua significantly increased GST density, while AaGSW2 knockdown lines showed impaired GST initiation. Ectopic expression of AaGSW2-homologs from two mint cultivars, Mentha spicata and Mentha haplocalyx, in A. annua also induced GST formation. These results reveal a molecular mechanism involving homeodomain and WRKY proteins that controls glandular trichome initiation, at least part of which is shared by A. annua and mint.

15.
Peptides ; 135: 170422, 2020 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-33144092

RESUMO

Nonalcoholic steatohepatitis (NASH) is a global public health challenge. Overwhelmed oxidative stress and impaired autophagy play an important role in the progression of NASH. Chemerin is an adipokine that has attracted much attention in inflammation and metabolic diseases. This study aimed to examine the effects of chemerin in NASH and its association with oxidative stress and autophagy. In this study, chemerin was found to significantly ameliorate high-fat diet (HFD) induced NASH, marked by decreased serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), interleukin (IL)-1ß, IL-6, and tumor necrosis factor-α (TNF-α), decreased insulin resistance (IR) and leptin resistance (LR), and improved liver lesions. Besides, chemerin prevented enhanced oxidative stress in NASH mice by regulating the antioxidant defense system (MDA downregulation and upregulation of superoxide dismutase (SOD)). Moreover, chemerin contributed to the alleviation of NASH through autophagy activation (p62 downregulation, and upregulation of beclin-1 and LC3). Furthermore, these effects were related to increased phosphorylation of JAK2-STAT3 stimulated by chemerin, which could be inhibited by the CMKLR1 specific inhibitor α-NETA. In conclusion, excess chemerin highly probably ameliorated NASH by alleviating oxidative stress and promoting autophagy, the mechanism responsible for this process was related, at least in part, to the increased phosphorylation of JAK2-STAT3 stimulated by chemerin/CMKLR1. Rh-chemerin may represent promising therapeutic targets in the treatment of NASH.

16.
Front Chem ; 8: 536907, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33195043

RESUMO

One Zn-Nd complex [Zn2Nd4L2(OAc)10(OH)2(CH3OH)2] (1) was synthesized from Schiff base ligand bis(3-methoxysalicylidene)ethylene-1,2-phenylenediamine (H2L). 1 shows nanoscale rectangular structure with sizes of about 0.8 × 1.1 × 2.8 nm. 1 exhibits typical near-infrared luminescence of Nd(III) under the excitation of UV-visible light. Further study shows that the complex displays luminescent response behavior to anions and nitro explosives, especially with high sensitivity to H2 PO 2 - and 2,4,6-trinitrophenol.

17.
J Natl Cancer Inst ; 2020 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-33225344

RESUMO

BACKGROUND: The influence of type 2 diabetes mellitus (T2D) duration on cancer incidence remains poorly understood. METHODS: We prospectively followed for cancer incidence 113 429 women in the Nurses' Health Study (1978-2014) and 45 604 men in the Health Professionals Follow-up Study (1988-2014) who were free of diabetes and cancer at baseline. Cancer incidences were ascertained by review of medical records. RESULTS: In the multivariable-adjusted model incident, T2D was associated with higher risk of cancers in the colorectum, lung, pancreas, esophagus, liver, thyroid, breast, and endometrium. The pooled hazard ratios (HRs) ranged from 1.21 (95% confidence interval [CI] = 1.06 to 1.38) for colorectal cancer to 3.39 (95% CI = 2.24 to 5.12) for liver cancer. For both composite cancer outcomes and individual cancers, the elevated risks did not further increase after 8 years of T2D duration. The hazard ratio for total cancer was 1.28 (95% CI = 1.17 to 1.40) for T2D duration of 4.1-6.0 years, 1.37 (95% CI = 1.25 to 1.50) for 6.1-8.0 years, 1.21 (95% CI = 1.09 to 1.35) for 8.1-10.0 years, and 1.04 (95% CI = 0.95 to 1.14) after 15.0 years. In a cross-sectional analysis, a higher level of plasma C-peptide was found among participants with prevalent T2D of up to 8 years than those without T2D, whereas a higher level of HbA1c was found for those with prevalent T2D of up to 15 years. CONCLUSIONS: Incident T2D was associated with higher cancer risk, which peaked at approximately 8 years after diabetes diagnosis. Similar duration-dependent pattern was observed for plasma C-peptide. Our findings support a role of hyperinsulinemia in cancer development.

18.
Life Sci ; 260: 118424, 2020 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-32949586

RESUMO

AIMS: Cannabinoid receptor 2 (CB2R) is an important regulator of immunoinflammatory responses. Interestingly, studies have demonstrated that CB2R was expressed in metabolically active tissue, so we speculated that CB2R might have a crucial impact on energy balance. We thus examined the anti-inflammatory activities of CB2R and a CB2R agonist, JWH-133, in diet-induced obese in mice as well as in cultured macrophages. MATERIALS AND METHODS: We evaluated the in vivo effect of JWH-133 on diet-induced adipose tissue inflammation. We also assessed the in vitro effects of JWH-133 on lipopolysaccharide (LPS)-induced inflammation in RAW264.7 macrophages, with a focus on the nuclear factor E2-related factor 2/heme oxygenase 1 (Nrf2/HO-1) signaling pathway. KEY FINDINGS: We found that JWH-133 reduced body weight gain, relieved glucose tolerance, and enhanced insulin sensitivity in a mouse model. It also down-regulated the expression of M1 macrophage biomarkers (tumor necrosis factor-α, interleukin (IL)-6, inducible nitric oxide synthase (iNOS), IL-1ß, CC motif chemokine ligand 2, and C-X-C motif chemokine 10) in vivo and in vitro, but up-regulated levels of M2 macrophage biomarkers (IL-10 and arginase-1) in both mice and cultured macrophages. Furthermore, the underlying mechanisms were studied in an LPS-treated RAW264.7 cell line. We found a role for JWH-133 in controlling M1 macrophage polarization by activating the Nrf2/HO-1 pathway, while the effect of JWH-133 was diminished by a HO-1 inhibitor, Sn(IV) protoporphyrin IX dichloride. SIGNIFICANCE: JWH-133 showed anti-obesity effects that ameliorated pro-inflammatory M1 macrophage polarization through the Nrf2/HO-1 pathway. Therefore, our results provide a new proof for the potential use of the CB2R agonist, JWH-133, in the treatment of obesity.


Assuntos
Canabinoides/farmacologia , Inflamação/tratamento farmacológico , Macrófagos/efeitos dos fármacos , Obesidade/etiologia , Adipócitos/efeitos dos fármacos , Adipócitos/patologia , Animais , Peso Corporal/efeitos dos fármacos , Polaridade Celular/efeitos dos fármacos , Citocinas/genética , Citocinas/metabolismo , Dieta Hiperlipídica/efeitos adversos , Expressão Gênica/efeitos dos fármacos , Glucose/metabolismo , Heme Oxigenase-1/metabolismo , Inflamação/etiologia , Lipopolissacarídeos/toxicidade , Macrófagos/metabolismo , Macrófagos/patologia , Masculino , Proteínas de Membrana/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Fator 2 Relacionado a NF-E2/metabolismo , Obesidade/complicações , Obesidade/patologia , Paniculite/tratamento farmacológico , Paniculite/patologia , Células RAW 264.7 , Receptor CB2 de Canabinoide/agonistas
19.
Inorg Chem ; 59(19): 14620-14626, 2020 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-32951426

RESUMO

One 14-metal Yb(III) nanoring [Yb14(HL)2L20(DMF)8(H2O)8] (1) with a size of about 1.1 × 2.5 × 2.7 nm was synthesized from a tridentate ligand. Under the excitation of ligand absorption bands, 1 exhibits the NIR luminescence of Yb(III) and displays high luminescence sensitivity and selectivity to Co(II), Cu(II), and 2,4,6-trinitrophenol (PA) at the parts per million level. The KSV values of 1 to Co(II), Cu(II), and PA are 6.0 × 104 M-1, 3.8 × 104 M-1, and 6.9 × 104 M-1, respectively. 1 exhibits high luminescent sensitivity to PA even in the presence of other explosives.

20.
Gynecol Oncol ; 159(2): 365-372, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32933759

RESUMO

OBJECTIVE: High-dose-rate (HDR) afterloading brachytherapy using Iridium-192 source involves large radiation activity varieties due to fast decay. It was unknown but clinically desirable to evaluate its impacts on patient outcomes to support more informed decisions. METHODS: Data of 510 cervical carcinoma (CC) patients were retrospectively included. High-radioactive (HR) and low-radioactive (LR) groups were statistically defined per patient-specific average mean-dose-rate (MDR) of all fractions. The cutoffs were calculated using R-3.6.1 packages based on significance of correlation with binary outcome or survival time. Categorized 1-month and 3-month follow-up results were analyzed as short-term outcomes. Long-term outcomes were evaluated using local recurrence-free survival (LRFS) and metastatic recurrence-free survival (MRFS). Propensity-score-matched (PSM) pairs were generated to reduce bias. RESULTS: The median follow-up time was 47.1 months (interquartile range: 33.9 months-66.4 months), involving MDR varieties of up to 9 folds ranging from 6059.99 cGy/h to 54013.66 cGy/h due to 17 source replacements at intervals ranging from 93 days-199 days. Both short-term (1-month: p = 0.22; 3-month: p = 0.79) and long-term (LRFS: p = 0.10; MRFS: p = 0.46) outcomes showed no significant difference between HR and LR. Subgroup analysis displayed significantly better results in LR for stage I-II (3-month, p = 0.02) and stage II (LRFS, p = 0.04) patients. Both LRFS and MRFS of LR were significantly non-inferior to HR (p ≤ 0.02). CONCLUSIONS: LR is clinically non-inferior or partially superior to HR for CC treatment using HDR, which dispels concerns of potentially undermined patient outcomes when source replacement is delayed.

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