Macrophage infiltration of the kidney is a prominent feature associated with the severity of renal injury and progressive renal failure. To determine the influence of macrophages in renal disease models in the absence of endogenous T and B cells, we performed adoptive transfer of macrophages into severe combined immunodeficient (SCID) mice. In this study, macrophages were isolated from the spleens of BALB/c mice and stimulated with lipopolysaccharide to induce classically activated M1 macrophages or with interleukin-4 (IL-4) and IL-13 to induce alternatively activated M2 macrophages. These macrophages were then infused into SCID mice with adriamycin nephropathy; an in vivo model of chronic inflammatory renal disease analogous to human focal segmental glomerulosclerosis. Mice infused with M1 macrophages had a more severe histological and functional injury, whereas M2 macrophage-induced transfused mice had reduced histological and functional injury. Both M1 and M2 macrophages localized preferentially to the area of injury and maintained their phenotypes even after 4 weeks. The protective effect of M2 macrophages was associated with reduced accumulation and possibly downregulated chemokine and inflammatory cytokine expression of the host infiltrating macrophages. Our findings demonstrate that macrophages not only act as effectors of immune injury but can be induced to provide protection against immune injury.

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Objective. In order to provide evidence for improving the quality of managers in elderly care institutions, this paper explored the situation of managers of elderly care institutions in a city in Central China under the national guidelines for the combination of medical and elderly health care. Design. A cross-sectional study carried out in a city in Central China was designed. Setting. The online questionnaire was distributed to the managers of six elderly care institutions in a city in Central China. Participants. The questionnaire was sent to 61 recipients; from this, 60 responses were obtained. Results. There was a 98% response rate. The study found that most managers in elderly care institutions were middle-aged, with low education level and years of management. The job mobility was high, and 27% of the managers had no relevant certificates. Management years had a significant influence on the rate of certificate holding (P<0.05). Some managers were less than 30 years old and had college degree or above, which indicated that people with young and high levels of education were more likely to become managers. However, there was no significant difference in educational level among managers of different ages (P>0.05). 56.6% of the managers have received provincial or municipal training, and few managers have received the national level training. The education level is positively related to the access to training opportunities. More than half of the managers earn less than ¥3000 a month. The study showed that the education level was positively related to the career growth space (P<0.05). Conclusions. Specialized training and high salary should be provided for managers to improve their elderly care skills and hence the quality of elderly care service. In addition, in order to improve the education level of managers, a long-term continuing education system should be established gradually. Through expanding the enrollment scale of the nursing school, carrying out training about elderly care skills, and issuing vocational skills certificates to those who pass the examination, the number of local nurses for the elderly will be increasing, and the quality of the elderly care service will be improving.

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