[Features and evaluations of organizational support provided by occupational health nurses in private practice for the implementation of sustainable health and productivity management in medium-sized enterprises].

OBJECTIVES: This study aimed to clarify the features and evaluations of the organizational support provided by occupational health nurses (OHNs) in private practice to promote sustainable health and productivity management (HPM) in medium-sized enterprises. METHODS: Corporate managers and employees of four enterprises with fewer than 300 employees received support from an experienced OHN in private practice through five support sessions per company, primarily targeting company managers. The OHNs documented their support steps and evaluations. After completing the support process, we conducted semi-structured interviews with company managers and OHNs to evaluate the support provided by the OHNs. The support processes were organized for each company according to an analytical framework based on the consolidated framework for implementation research; the support features of OHNs were extracted. The evaluations of the support provided by OHNs from the perspective of company personnel were categorized using content analysis. RESULTS: Six features of support by OHNs for the promotion of HPM were extracted, including clarifying corporate needs while focusing on relationships of trust with company representatives, providing appropriate health information, and introducing external resources to facilitate independent and continuous efforts in the company to promote sustainable HPM. The managers' evaluations of the support provided by the OHNs included the following six categories: 1) identified and recognized current internal health issues; 2) received specific assistance tailored to the company; 3) gained an opportunity to work on health promotion measures; 4) considered the development and continuation of future health promotion measures; 5) learned about the existence of OHNs as easy to consult with; and 6) identified aspects of support from OHNs that were different from what they expected. CONCLUSIONS: This study clarified the features and evaluations of the support provided by OHNs in private practice in medium-sized enterprises for the promotion of HPM. Our findings suggest that the involvement of OHNs in private practice may increase the number of medium-sized enterprises that can autonomously commit themselves to HPM in a sustainable manner.

Support for balancing cancer treatment and work by occupational health nurses: support structures and implementation status.

This study aimed to quantitatively grasp the structure of support for balancing cancer treatment and work among occupational health nurses (OHNs) with the current implementation status. The anonymous questionnaire was designed based on the findings of our previous qualitative study and distributed to OHNs. The degrees of support implementation for workers with cancer, superiors and colleagues, and human resource managers were assessed for each item. Factor analysis of support items was conducted, and Wilcoxon signed-rank test was carried out to compare the support scores between the factors. Support for workers with cancer comprised six factors in which the factor, concerning the provision of information regarding resources inside and outside the company, showed the lowest score. Support for superiors and colleagues was divided into three factors, and that for human resource managers comprised two factors. By Mann-Whitney's U-test, it was found that OHNs, who worked without full-time occupational health physicians for smaller companies, showed significantly higher implementation for several support factors, such as support to human resource managers. This study revealed the structure as well as implementation status of OHNs' support for balancing cancer treatment and work, which will provide suggestions for developing training programs for OHNs to promote these activities.

Development and evaluation of a training program for occupational health nurses regarding support for workers with cancer and their workplaces.

OBJECTIVES: This study aimed to develop and evaluate a training program for occupational health nurses (OHNs) regarding support for workers with cancer and their workplaces. METHODS: Based on our prior research, we engaged in multiple discussions on the development of training program for OHNs. For examining the effectiveness of the developed training program, we collected and analyzed the data from three repeated surveys conducted before, immediately after, and 3 months after the training on self-confidence levels of the participants regarding 23 items associated with support for workers with cancer and their workplaces. RESULTS: We made a 3-hour training program including a lecture and a group work. First, we gave a lecture explaining the support scheme consisting of 4 parts and the 12 hints in action phrase while using the guidebook. Second, we conducted the group work regarding the case of a female worker diagnosed with breast cancer. Of the participants who supported workers with cancer in actuality during the 3-month post-training, 86% acknowledged the utility of the training in implementing support. As for the pre-post evaluation of the training program, most items of the participants' self-confidence significantly increased from pretraining to immediately after and 3 months post-training. DISCUSSION: This study demonstrated that the developed training program was effective in that the participants learned the support schemes and skills and gained self-confidence in implementing supports in real-work settings. We hope that this training program will be extensively used in the future, enabling OHNs to contribute toward balancing cancer treatment and work.

The Effectiveness of Japan's Community Centers in Facilitating Social Participation and Maintaining the Functional Capacity of Older People.

This study examines the effectiveness of a community center in Japan at promoting social participation and sustaining its regular users' functional capacity. The surveys were distributed to 108 physically and cognitively independent local older people; 72 responses were received. There were 16 regular users and 56 nonregular users. An inverse probability of treatment-weighted Poisson regression analysis was performed, and prevalence rate ratios were computed for social participation and functional capacity according to respondents' use of the center. Results showed that using the center regularly facilitated social participation, contributing to the maintenance of living functions. Regular users' social participation was promoted through opportunities in sports and volunteer organizations. Their living functions were maintained through instrumental self-maintenance and intellectual activity. Community centers evidently enable beneficial gatherings of older people, encourage social participation, and help to maintain higher level activities of daily living. Thus, they might offer effective preventative care for older people.

Identification of Plants That Inhibit Lipid Droplet Formation in Liver Cells: Rubus suavissimus Leaf Extract Protects Mice from High-Fat Diet-Induced Fatty Liver by Directly Affecting Liver Cells.

Fatty liver disease is a condition in which abnormally large numbers of lipid droplets accumulate in liver cells. Fatty liver disease induces inflammation under conditions of oxidative stress and may result in cancer. To identify plants that protect against fatty liver disease, we examined the inhibitory effects of plant extracts on lipid droplet formation in mouse hepatoma cells. A screen of 98 water extracts of plants revealed 4 extracts with inhibitory effects. One of these extracts, Rubus suavissimus S. Lee (Tien-cha or Chinese sweet tea) leaf extract, which showed strong inhibitory effects, was tested in a mouse fatty liver model. In these mouse experiments, intake of the plant extract significantly protected mice against fatty liver disease without affecting body weight gain. Our results suggest that RSE directly affects liver cells and protects them from fatty liver disease.

A small molecule inhibitor of Bcl-2, HA14-1, also inhibits ceramide glucosyltransferase.

HA14-1 is a Bcl-2 inhibitor that is widely used for studies of apoptosis. In the course of searching for a ceramide glucosyltransferase inhibitor that catalyzes the first glycosylation step of glycosphingolipid synthesis, we unexpectedly found that HA-14-1 also has the ability to inhibit ceramide glucosyltransferase. The IC50 value of HA14-1 against ceramide glucosyltransferase is 4.5µM, which is lower than that reported for Bcl-2 in vitro. Kinetic analyses revealed that HA14-1 is a competitive and mixed-type inhibitor with respect to C6-NBD-ceramide and UDP-glucose, respectively.

Biological effects of Mammalian translationally controlled tumor protein (TCTP) on cell death, proliferation, and tumorigenesis.

Translationally controlled tumor protein (TCTP) is a highly conserved protein found in eukaryotes, across animal and plant kingdoms and even in yeast. Mammalian TCTP is ubiquitously expressed in various tissues and cell types. TCTP is a multifunctional protein which plays important roles in a number of cell physiological events, such as immune responses, cell proliferation, tumorigenicity, and cell death, including apoptosis. Recent identification of TCTP as an antiapoptotic protein has attracted interest of many researchers in the field. The mechanism of antiapoptotic activity, however, has not been solved completely, and TCTP might inhibit other types of cell death. Cell death (including apoptosis) is closely linked to proliferation and tumorigenesis. In this context, we review recent findings regarding the role of TCTP in cell death, proliferation, and tumorigenesis and discuss the mechanisms.

Up-regulation of ceramide glucosyltransferase during the differentiation of U937 cells.

The phorbol ester tetradecanoylphorbol acetate (TPA) induces promyelocytic leukaemia cells to differentiate to macrophage-like cells in vitro. During the course of this differentiation, the cells adhere to the bottom of the culture dish, a process that requires an increase in cell surface glycosphingolipids (GSLs). We examined the cellular content of glucosylceramide (GlcCer), the simplest of the GSLs, in a TPA-treated leukaemia cell line, U937. Following TPA treatment, we observed a 3.5-fold increase in GlcCer levels that was caused by enhanced activity of ceramide glucosyltransferase (GlcT-1), which catalyses ceramide glycosylation. Furthermore, in TPA-treated cell GlcT-1 amounts were increased at both the mRNA and protein levels. We also found decreased activity of lactosylceramide synthase in TPA-treated cells, which could also contribute to the increase in cellular GlcCer content.

Functional cloning of genes that suppress oxidative stress-induced cell death: TCTP prevents hydrogen peroxide-induced cell death.

We used retroviral-mediated expression cloning to identify cDNAs that inhibit cell death induced by oxidative stress. To isolate the genes, we introduced a murine embryonic retroviral cDNA library into NIH/3T3 cells, and selected for cells resistant to hydrogen peroxide. The surviving cells were cloned, and the integrated cDNAs were rescued by polymerase chain reaction. Several of the isolated cDNAs are known to be involved in modulating the redox state of cells. Other cDNAs encode proteins known to suppress apoptosis caused by reasons other than oxidative stress. These included polyadenylate-binding protein, cytosolic 1 (Pabpc1) and translationally controlled tumor protein (TCTP).

Identification and characterization of a novel alternative splice variant of mouse GMx33alpha/GPP34.

We have cloned and characterized a novel splice variant of mouse GMx33alpha/Golgi-associated protein of 34 kDa (GPP34), hereby designated GMx33alphaV/GPP34V. This splice variant skips the second and third exons, and the resulting frame shift generates a stop codon in the fourth exon. GMx33alphaV/GPP34V is comprised of 81 amino acid residues derived from the N-terminal end of the full length protein and corresponds to approximately one-third of the full length GMx33alpha/GPP34 sequence with a calculated molecular mass of 8900. In contrast to GMx33alpha/GPP34 mRNA which is expressed at similar levels in various tissues, GMx33alphaV/GPP34V mRNA was differentially expressed when examined by RT-PCR. Compared to other tissues, skeletal muscle showed relatively strong expression of GMx33alphaV/GPP34V mRNA. This splice variant cDNA was also detected in a human cell line.