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EuropePMC; 2020.
Preprint in English | EuropePMC | ID: ppcovidwho-313399


Backgrounds: : To describe the clinical characteristics of coronavirus disease 2019 hospitalized patients and further analyze the potential risk factors related to the severity of the disease and 28-day mortality of patients. Methods: : A total of 122 coronavirus disease 2019 patients hospitalized in Wuhan Third Hospital from 26 January 2020 to 16 March 2020 were included in this retrospective study. Clinical data of patients were retrospectively analyzed, and the risk factors associated with disease severity and 28-day mortality were screened by cox regression analysis. Results: : Of all 122 patients, the median age was 64 years old (interquartile range, 57- 71 years old).Compared with non-severe patients, severe patients had higher indices like cardiac troponin T and respiratory rate. In cox regression analysis, cardiac troponin T correlated with 28-day mortality most. Conclusions: : Abnormal cardiac troponin T value after admission were in strong correlation with 28-day survival status.

Mikrochim Acta ; 188(8): 284, 2021 08 02.
Article in English | MEDLINE | ID: covidwho-1397013


An aptasensor for electrochemical detection of carbendazim is reported with mulberry fruit-like gold nanocrystal (MF-Au)/multiple graphene aerogel (MGA) and DNA cycle amplification. HAuCl4 was reduced by ascorbic acid in a CTAC solution containing KBr and KI and formed trioctahedron gold nanocrystal. The gold nanocrystal underwent structural evolution under enantioselective direction of L-cysteine. The resulting MF-Au shows a mulberry fruit-like nanostructure composed of gold nanocrystals of about 200 nm as the core and many irregular gold nanoparticles of about 30 nm as the shell. The exposure of high-index facets improves the catalytic activity of MF-Au. MF-Au/MGA was used for the construction of an aptasensor for electrochemical detection of carbendazim. The aptamer hybridizes with assistant strand DNA to form duplex DNA. Carbendazim binds with the formed duplex DNA to release assistant strand DNA, triggering one three-cascade DNA cycle. The utilization of a DNA cycle allows one carbendazim molecule to bring many methylene blue-labeled DNA fragments to the electrode surface. This promotes significant signal amplification due to the redox reaction of methylene blue. The detection signal is further enhanced by the catalysis of MF-Au and MGA towards the redox of methylene blue. A differential pulse voltammetric signal, best measured at - 0.32 V vs. Ag/AgCl, increases linearly with the carbendazim concentration ranging from 1.0 × 10-16 to 1.0 × 10-11 M with a detection limit of 4.4 × 10-17 M. The method provides ultrahigh sensitivity and selectivity and was successfully applied to the electrochemical detection of carbendazim in cucumber. This study reports on an ultrasensitive aptasensor for electrochemical detection of carbendazim in cucumber based on mulberry fruit-like gold nanocrystal-multiple graphene aerogel and DNA cycle double amplification.

Aptamers, Nucleotide/chemistry , Benzimidazoles/analysis , Biosensing Techniques/methods , Carbamates/analysis , DNA/chemistry , Metal Nanoparticles/chemistry , Benzimidazoles/chemistry , Carbamates/chemistry , Cysteine/chemistry , Electrochemical Techniques/methods , Gels/chemistry , Gold/chemistry , Graphite/chemistry , Immobilized Nucleic Acids/chemistry , Limit of Detection , Methylene Blue/chemistry , Oxidation-Reduction
Preprint in English | medRxiv | ID: ppmedrxiv-20038539


BackgroundSince January 2020, coronavirus disease 2019 (Covid-19) has spread rapidly and developing the pandemic model around the world. Data have been needed on the clinical characteristics of the affected patients in an imported cases as model in island outside Wuhan. MethodsWe conducted a retrospective study included all 168 confirmed cases of Covid-19 in Hainan province from 22 January 2020 to 13 March 2020. Cases were confirmed by real-time RT-PCR and were analysed for demographic, clinical, radiological and laboratory data. ResultsOf 168 patients, 160 have been discharged, 6 have died and 2 remain hospitalized. The median age was 51.0 years and 51.8% were females. 129 (76.8%) patients were imported cases, and 118 (70.2%), 51 (30.4%) and 52 (31%) of patients lived in Wuhan or traveled to Wuhan, had contact with Covid-19 patients, or had contact with Wuhan residents, respectively. The most common symptoms at onset of illness were fever (65.5%), dry cough (48.8%) and expectoration (32.1%). On admission, ground-glass opacity was the most common radiologic finding on chest computed tomography (60.2%). The elderly people with diabetes, hypertension and CVD are more likely to develop severe cases. Follow-up of 160 discharged patients found that 20 patients (12.5%) had a positive RT-PCR test results of pharyngeal swabs or anal swabs or fecal. ConclusionsIn light of the rapid spread of Covid-19 around the world, early diagnosis and quarantine is important to curb the spread of Covid-19 and intensive treatments in early stage is to prevent patients away from critical condition.