The Formation of Stigma and Its Social Consequences on Chinese People Living With Lung Cancer: A Qualitative Study.

PURPOSE: To explore the formation of stigma toward lung cancer and its social consequences for Chinese patients living with this diagnosis. PARTICIPANTS & SETTING: A purposive sample of 19 patients with lung cancer were recruited in the outpatient clinic of a tertiary cancer center in southern China. METHODOLOGIC APPROACH: This is a descriptive qualitative study. Semistructured interviews were conducted to explore the formation of stigma toward lung cancer and its social consequences. Audio recordings were transcribed verbatim and coded by the thematic analysis approach. FINDINGS: The following three themes emerged from interviews: (a) sources of stigma, (b) stigma manifestations, and (c) social consequences of stigma. IMPLICATIONS FOR NURSING: Considering that the formation of lung cancer stigma is socioculturally specific, existing stereotypes and prejudice in Chinese society should be the focus of antistigma interventions at the population level. At the individual level, cancer concealment, resistance to cancer identity, and feelings of no longer being a normal person were three common manifestations that may be indicators for stigma screening among people with lung cancer. In addition, stigmas profoundly affected patients' social lives and their help-seeking behaviors, and medical staff should use effective strategies to alleviate stigma toward lung cancer and its effects.

Enhanced Production of Ethyl Lactate in Saccharomyces cerevisiae by Genetic Modification.

Ethyl lactate is an important flavor substance in baijiu, and it is also one of the common raw materials in the production of flavors and spices. In this study, we first established the ethyl lactate biosynthesis pathway in Saccharomyces cerevisiae α(L) by introducing propionyl coenzyme A transferase (Pct) and alcohol acyltransferase (AAT), and the results showed that strain α(L)-CP-Ae produced the most ethyl lactate 239.53 ± 5.45 mg/L. Subsequently, the copy number of the Pctcp gene and AeAT9 gene was increased, and the modified strain α(L)-tCP-tAe produced 346.39 ± 3.99 mg/L ethyl lactate. Finally, the porin gene (por2) and the mitochondrial pyruvate carrier gene (MPC2) were knocked to impede mitochondrial transport of pyruvate, and the final modified strain α(L)-tCP-tAeΔpor2 produced ethyl lactate 420.48 ± 6.03 mg/L.

Biosynthetic Pathway for Ethyl Butyrate Production in Saccharomyces cerevisiae.

Ethyl butyrate is one of the most important flavor substances in Chinese Baijiu and is also an ingredient in various daily-use chemical essences and food flavorings. In this study, to produce ethyl butyrate, we first introduced a butyryl-CoA synthesis pathway into Saccharomyces cerevisiae. Subsequently, three different alcohol acyltransferases, SAAT, VAAT, and CmAAT, were separately introduced into S. cerevisiae to catalyze the reaction of butyryl-CoA with ethanol to produce ethyl butyrate, and the results showed that strain EBS with SAAT produced the most ethyl butyrate (20.06 ± 2.23 mg/L). Furthermore, as the reaction catalyzed by Bcd to produce butyryl-CoA from crotonyl-CoA is a rate-limiting step, we replaced Bcd with Ter, and the modified strain EST produced 77.33 ± 4.79 mg/L ethyl butyrate. Finally, the copy numbers of Ter and SAAT were further increased, and the resulting modified strain EST-dST produced 99.65 ± 7.32 mg/L ethyl butyrate.