Examine the relationships between health-related quality of life, achievement motivation and job performance: the case of Taiwan hospitality industry.

BACKGROUND: Employees are considered as one of the most important assets in many organizations, and their health well-being is critical to help achieve a sustainable and motivated workforce that is committed to delivering quality hospitality services through enhanced performance and productivity. Given the extent of the challenges and impact presented by the COVID-19 pandemic to the hospitality industry, it is timely to gain further insights on employees' health well-being. The key purpose of this study is to examine the relationships between health-related quality of life, achievement motivation and job performance in the Taiwan hospitality industry, to acquire a better understanding of their relationships through the job performance pathway models. METHODS: This study has used a purposeful sampling technique to select the 10 highest-earning hospitality companies in Taiwan. A total of 292 questionnaires were collected from the employees of these hospitality companies. Based on the multi-dimensional concept of health-related quality of life (HRQoL), the relationships between the five key dimensions (i.e. psychological health, physical health, social health, achievement motivation, and job performance) were examined. To measure these dimensions, the survey questions were adapted from previous research such as the World Health Organization's WHOQOL-BREF scale, Minnesota Satisfaction Questionnaire. Partial least squares - Structural Equation Modeling method was used to explore these dimensions, and two job performance pathway models (for manager and staff) were subsequently developed. RESULTS AND CONCLUSIONS: Findings showed that psychological health directly affected the manager's job performance and physical health had a similar effect through social health. While psychological health had not affected the staff's job performance, but it could affect achievement motivation through both direct and indirect effects of social health. The pathway models that were developed indicated that the manager's job performance was mainly affected by psychological health and social health, whereas the key dimension that had affected the staff's job performance was achievement motivation.

Phenethyl isothiocyanate inhibits in vivo growth of subcutaneous xenograft tumors of human malignant melanoma A375.S2 cells.

Numerous studies have shown that phenethyl isothiocyanate (PEITC) induces apoptosis of different types of human cancer cell lines, however, there are no reports showing that PEITC inhibits tumor growth in a xenograft model of melanoma in nude mice. We investigated effects of PEITC on the growth of xenografted A375.S2 cell tumors in nude BALB/c mice. A375.S2 cancer cells were inoculated subcutaneously into the lower flanks of mice. Seven days post-inoculation, mice having one palpable tumor were randomly divided into three groups and injected intraperitoneally with PEITC (0, 20 and 40 mg/kg). PEITC reduced tumor weight but total body weight was unaffected. These in vivo results provide support for further investigations to determine the potential use of PEITC as an anticancer drug.

Extract of medicinal mushroom Agaricus blazei Murill enhances the non-specific and adaptive immune activities in BALB/c mice.

Agaricus blazei Murill (AbM) is traditionally used against a wide range of conditions such as ulcerative colitis, Crohn's disease, foot-and-mouth disease and chronic hepatitis C infection. In this study, we evaluated the immunomodulatory effects of AbM. For the non-specific immune response experiments, a total of 40 female BALB/c mice were divided into control (group 1) and experimental (groups 2-4) groups of 10 animals each. Groups 2, 3 and 4 were orally-administered high (819 mg/kg), medium (273 mg/kg) and low (136.5 mg/kg) doses of AbM daily for six weeks and then six parameters related to non-specific immune response were detected. For the adaptive immune response experiments, 40 female mice were similarly divided into four groups. After six weeks of treatment, animals were immunized with the OVA immunogen. Two weeks later, splenocytes and sera were collected. Four parameters related to adaptive immune response were evaluated. We found that feeding mice with AbM extract increased the IgG level in serum, promoted phagocytosis of peritoneal macrophages and elevated the activity of Natural killer cells. We also found that the highest dose of AbM increased interleukin-2 (IL-2) levels in splenocytes and that a medium dose increased interferon-γ. The levels of interleukin-4 (IL-4) were reduced or unchanged. T-helper type 1 cytokine levels were increased. AbM increased the humoral immune response and also affected the cellular immune response. These results provide evidence that AbM can modulate innate and adaptive immunity.

Oral administration of benzyl-isothiocyanate inhibits in vivo growth of subcutaneous xenograft tumors of human malignant melanoma A375.S2 cells.

A number of experiments have demonstrated that benzyl-isothiocyanate (BITC) induces cytotoxic cell death through the induction of apoptosis in various human cancer cell lines. In the present study, we investigated the effects of BITC on the growth of A375.S2 cell xenograft tumors in nude BALB/c mice in vivo. The A375.S2 cancer cells were inoculated subcutaneously into the lower flanks of each nude mouse. After cancer cell inoculation, all animals were maintained in the animal room for seven days and all mice produced one palpable tumor. Animals were randomly divided into two groups, each mouse was individually given intraperitoneal injections of BITC (20 mg/kg) or not (control). Results from the in vivo experiments indicated that BITC did not significantly affect the body weight of nude BALB/c mice bearing xenograft A375.S2 cell tumors but did significantly decrease the tumor weight.