Association of Lung Cancer Risk With the Presence of Both Lung Nodules and Emphysema in a Lung Cancer Screening Trial.

Background: The coexistence of emphysema and lung nodules could interact with each other and then lead to potential higher lung cancer risk. The study aimed to explore the association between emphysema combined with lung nodules and lung cancer risk.

Methods: A total of 21,949 participants from the National Lung Screening Trial (NLST) who underwent low-dose computed tomography (LDCT) examination were included.

[Study on the ability of mammalian reovirus BYD1 to induce apoptosis and analysis of the structure of viral major membrane penetration protein involved in proapoptosis induction].

Objective: To study a newly isolated domestic mammalian reovirus, BYD1, its ability to induce apoptosis analyze the three-dimensional structure of its major membrane penetration protein to predict its function in inducing apoptosis.

Methods: HeLa cells infected with BYD1 reovirus were metered with flow cytometer (FCM) to quantify the ratio of apoptotic cells. The data were analyzed with Student's t-test to judge the ability of BYD1 strain to induce apoptosis.

[Expression and nuclease activity analysis of staphylococcus nuclease in E.coli].

Aim: To express staphylococcus nuclease (SN) in E.coli and prepare rabbit antisera against SN.

Methods: The SN gene was amplified by high-fidelity PCR from plasmid pPLC-SN and then subcloned into expression vector pLEX to obtain the recombinant plasmid pLEX-SN.