Factors that can induce the release of histamine from basophils have been studied for more than 30 years. A protein termed histamine-releasing factor (HRF) was purified and molecularly cloned in 1995. HRF can stimulate histamine release and IL-4 and IL-13 production from IgE-sensitized basophils and mast cells. HRF-like activities were found in bodily fluids during the late phase of allergic reactions, implicating HRF in allergic diseases. However, definitive evidence for the role of HRF in allergic diseases has remained elusive. On the other hand, we found effects of monomeric IgE on the survival and activation of mast cells without the involvement of a specific antigen, as well as heterogeneity of IgEs in their ability to cause such effects. The latter property of IgE molecules seemed to be similar to the heterogeneity of IgEs in their ability to prime basophils in response to HRF. This similarity led to our recent finding that ~30% of IgE molecules can bind to HRF via their Fab interactions with two binding sites within the HRF molecule. The use of peptide inhibitors that block HRF-IgE interactions revealed an essential role of HRF to promote skin hypersensitivity and airway inflammation. This review summarizes this and more recent findings and provides a perspective on how they impact our understanding of allergy pathogenesis and potentially change the treatment of allergic diseases.
Asthma* ; Basophils ; Binding Sites ; Clone Cells ; Hand ; Histamine ; Histamine Release ; Hypersensitivity* ; Immunoglobulin E ; Immunoglobulins* ; Inflammation ; Interleukin-13 ; Interleukin-4 ; Mast Cells ; Population Characteristics ; Skin

In order to promote regional cooperation in palliative care, we developed a regional cooperation clinical pathway for home palliative care that offers simple support and is easy to use. We then administered a questionnaire survey to 14 healthcare professionals with various specialties who were involved in the introduction of the pathway, and we revised the pathway on the basis of the survey results. The revised pathway was then tested in 13 patients who were discharged from 3 designated cancer care hospitals in Toyama City to home care, and another questionnaire survey was conducted afterwards in the same manner. The mean overall score on the questionnaire was 2 in seven, 3 in seven (on a scale of 0 to 3) at the time of introduction, whereas the score after trial use was 1 in one, 2 in four, 3 in five. We believe that more innovative approaches to the implementation of such pathways are required.

Purpose and Methods: Aiming at the relief of suffering by the palliative care team and prompt information sharing between healthcare professionals with various specialties, We introduced new IT cloud system, carried out questionnaire survey and examined the usefulness to 11 persons of healthcare professionals. Five cases where the palliative care team was concerned during the hospitalize became a home palliative care to the tried half a year. Results: All the members were using the personal computer as an input device. Four persons were using the iPhone. Two persons had the experience inputted on the spot. Nine persons of the input time were 5 or less minutes. All the members were perusing at various places by various device. Urgently and vital mail was useful: 3 in six, 2 in three, 1 in one, 0 in one. Information content were suitable: 3 in nine, 2 in two. Cooperation were completed in the smooth: 3 in nine, 2 in two. Have you utilized EIR for the home palliative care?: 3 in nine, 2 in two. Conclution: To the support of information sharing and palliative care team by IT cloud system transduction, the useful probability was suggested in the home palliative care.

PURPOSE: Monomeric IgE molecules, when bound to the high-affinity receptor, exhibit a vast heterogeneity in their ability to induce survival promotion and cytokine production in mast cells. At one end of this spectrum, highly cytokinergic (HC) IgEs can induce potent survival promotion, degranulation, cytokine production, migration, etc., whereas at the other end, poorly cytokinergic (PC) IgEs can do so inefficiently. In this study, we investigated whether IgEs recognize autoantigens and whether IgEs' binding of autoantigens correlates with difference s in HC versus PC properties. METHODS: Enzyme-linked immunosorbent assays were performed to test whether IgEs bind antigens. Histamine-releasing factor in human sera was quantified by western blotting. Cultured mast cells derived from human cord blood were used to test the effects of human sera on cytokine production. RESULTS: Most (7/8) of mouse monoclonal HC IgEs exhibited polyreactivity to double-stranded DNA (dsDNA), single-stranded DNA (ssDNA), beta-galactosidase, thyroglobulin and/or histamine-releasing factor. By contrast, mouse PC IgEs failed to react with these antigens. A human monoclonal HC IgE also showed polyreactivity to histamine-releasing factor, dsDNA and ssDNA. Interestingly, sera from atopic dermatitis patients showed increased reactivity to ssDNA and beta-galactosidase and increased levels of histamine-releasing factor. Some atopic dermatitis patients, but not healthy individuals, had substantial serum levels of HRF-reactive IgE. Sera from atopic dermatitis patients with high titers of DNA-reactive IgE could induce several fold more IL-8 secretion in human mast cells than sera from healthy individuals. CONCLUSIONS: The results show that most HC, but not PC, IgEs exhibit polyreactivity to autoantigens, supporting the autoimmune mechanism in the pathogenesis of atopic dermatitis.
Animals ; Autoantigens ; beta-Galactosidase ; Blotting, Western ; Dermatitis, Atopic ; DNA ; DNA, Single-Stranded ; Enzyme-Linked Immunosorbent Assay ; Fetal Blood ; Humans ; Immunoglobulin E ; Interleukin-8 ; Mast Cells ; Mice ; Population Characteristics ; Thyroglobulin

Objective: Perceptions of citizens and health professions educators towards the socioeconomic backgrounds of medical students were investigated to elucidate the challenges of selecting medical students who will be responsible for the future of healthcare in Japan.Methods: Ten focus groups, comprising 14 citizens and 26 health professions educators, were conducted regarding the presented information on the socioeconomic backgrounds of Japanese medical students. Data were analyzed using an inductive thematic analysis approach.Results: Six themes related to family backgrounds, such as higher economic status, five themes related to social backgrounds, such as social and educational disparity, and four themes related to expectations for medical education, such as selection of medical students with diverse backgrounds were extracted.Discussion: Both citizens and health professions educators were aware of the problem of the skewed socioeconomic backgrounds of medical students and the need to expand diversity. This finding will contribute to the reconsideration of future medical school admission criteria.

Objective: To clarify the characteristics of medical students' motives for choosing their profession.Methods: A nationwide, cross-sectional, quantitative web survey was conducted using the Profession Choice Motivation Scale for Education Students. Results: Valid responses were obtained from 1,804 medical students, and the applicability of this scale was demonstrated. Medical students considered "contribution to others," "fulfillment in the profession and studying medicine," "financial aspects," and "evaluation by others" to be important, while "mental and physical comfort" was deemed less important. Mean scores for "contribution to others" were significantly higher among female students, public medical school students, students attending their first- or second-choice medical schools, regional quota students, public high school graduates, and first-generation college students. Conversely, students with very low scores for "contribution to others" showed opposite demographic backgrounds. Discussion: The Profession Choice Motivation Scale for Education Students was applicable to the analysis of medical students, and a correlation was observed between demographic backgrounds and profession choice motives.