Search

BackgroundWeb 2.0 has improved interactions among peers on the Internet, especially for the many online patient communities that have emerged over the past decades. Online communities are said to be particularly beneficial peer support resources for patients with breast cancer. However, most studies of online patient communities have focused on those members who post actively (posters), even though there are many members who participate without posting (lurkers). In addition, little attention has been paid to the usage of online communities among non-English-speaking patients. ObjectiveThe present study explored the differences in peer support received by lurkers and posters in online breast cancer communities. It also examined the effects of such support on both groups’ mental health. MethodsWe conducted an exploratory, descriptive, cross-sectional, Web-based survey among members of four Japanese online breast cancer communities. In an online questionnaire, we asked questions regarding sociodemographics, disease-related characteristics, mental health, participation in online communities, and peer support received from those communities. ResultsOf the 465 people who accessed the questionnaire, 253 completed it. Of the respondents, 113/220 (51.4%) were lurkers. There was no significant difference between lurkers and posters with regard to sociodemographic variables. About half of the posters had been given a diagnosis of breast cancer less than a year previously, which was a significantly shorter period than that of the lurkers (P = .02). The 5 support functions extracted by factor analysis were the same for both posters and lurkers. These were emotional support/helper therapy, emotional expression, conflict, advice, and insight/universality. When the support scores were calculated, insight/universality scored highest for both posters and lurkers, with scores that were not significantly different between the two groups. Among the 5 support scores, emotional support/helper therapy and emotional expression were significantly higher among posters. For posters, emotional support/helper therapy and advice were negatively correlated with the anxiety subscale of the Hospital Anxiety and Depression Scale. Emotional expression, advice, and insight/universality were negatively correlated with the anxiety subscale for lurkers. ConclusionWe found that posters felt they received more benefits from online communities than lurkers did, including emotional support, helping other patients, and expressing their emotions. Yet even lurkers were found to gain a certain amount of peer support through online communities, especially with regard to advice and insight/universality. The results demonstrate that participation in online communities—even as a lurker—may be beneficial to breast cancer patients’ mental health.

In hippocampal CA1 neurons of wild-type mice, a short tetanus (15 or 20 pulses at 100 Hz) or a standard tetanus (100 pulses at 100 Hz) to a naive input pathway induces long-term potentiation (LTP) of the responses. Low-frequency stimulation (LFS; 1000 pulses at 1 Hz) 60 min after the standard tetanus reverses LTP (depotentiation [DP]), while LFS applied 60 min prior to the standard tetanus suppresses LTP induction (LTP suppression). We investigated LTP, DP, and LTP suppression of both field excitatory postsynaptic potentials and population spikes in CA1 neurons of mice lacking the inositol 1,4,5-trisphosphate (IP[subscript 3]) receptor (IP[subscript 3]R)-binding protein released with IP[subscript 3] (IRBIT). The mean magnitudes of LTP induced by short and standard tetanus were not different in mutant and wild-type mice. In contrast, DP and LTP suppression were attenuated in mutant mice, whereby the mean magnitude of responses after LFS or tetanus were significantly greater than in wild-type mice. These results suggest that, in hippocampal CA1 neurons, IRBIT is involved in DP and LTP suppression, but is not essential for LTP. The attenuation of DP and LTP suppression in mice lacking IRBIT indicates that this protein, released during or after priming stimulations, determines the direction of LTP expression after the delivery of subsequent stimulations.

In CA1 neurons of guinea pig hippocampal slices, long-term potentiation (LTP) was induced in field excitatory postsynaptic potentials (EPSPs) or population spikes (PSs) by the delivery of high-frequency stimulation (HFS, 100 pulses at 100 Hz) to CA1 synapses, and was reversed by the delivery of a train of low-frequency stimulation (LFS, 1000 pulses at 2 Hz) at 30 min after HFS (depotentiation), and this effect was inhibited when test synaptic stimulation was halted for a 19-min period after HFS or for a 20-min period after LFS or applied over the same time period in the presence of an antagonist of N-methyl-D-aspartate receptors (NMDARs), group I metabotropic glutamate receptors (mGluRs), or inositol 1, 4, 5-trisphosphate receptors (IP[subscript 3]Rs). Depotentiation was also blocked by the application of a Ca[superscript 2+]/calmodulin-dependent protein kinase II (CaMKII) inhibitor or a calcineurin inhibitor applied in the presence of test synaptic input for a 10-min period after HFS or for a 20-min period after LFS. These results suggest that, in postsynaptic neurons, the coactivation of NMDARs and group I mGluRs due to sustained synaptic activity following LTP induction results in the activation of IP[subscript 3]Rs and CaMKII, which leads to the activation of calcineurin after LFS and depotentiation of CA1 synaptic responses.

A high rate of heavy tobacco smoking among people with schizophrenia has been suggested to reflect self-medication and amelioration of cognitive dysfunction, a core feature of schizophrenia. NMDAR hypofunction is hypothesized to be a mechanism of cognitive dysfunction, and excessive schizophrenia-linked neuregulin 1 (NRG1) signaling through its receptor ErbB4 can suppress NMDAR function by preventing Src-mediated enhancement of NMDAR responses. Here we investigated whether chronic nicotine exposure in rats by subcutaneous injection of nicotine (0.5-1 mg/kg, twice daily for 10-15 days) counteracts the suppressive effect of NRG1β on NMDAR-mediated responses recorded from CA1 pyramidal cells in acute hippocampal slices. We found that NRG1β, which prevents the enhancement of NMDAR responses by the Src-family-kinase-activating peptide pYEEI in naive rats, failed to block the effect of pYEEI in nicotine-exposed rats. In naive rats, NRG1β acts only on GluN2B-NMDARs by blocking their Src-mediated upregulation. Chronic nicotine exposure causes enhanced GluN2B-NMDAR responses via Src upregulation and recruits Fyn for the enhancement of GluN2A-NMDAR responses. NRG1β has no effect on both enhanced basal GluN2B-NMDAR responses and Fyn-mediated enhancement of GluN2A-NMDAR responses. Src-mediated enhancement of GluN2B-NMDAR responses and Fyn-mediated enhancement of GluN2A-NMDAR responses initiate long-term potentiation (LTP) of AMPAR synaptic responses in naive and nicotine-exposed CA1 pyramidal cells, respectively. These results suggest that NRG1β suppresses LTP by blocking Src-mediated enhancement of GluN2B-NMDAR responses, but has no effect on LTP in nicotine-exposed rats. These effects of chronic nicotine exposure may counteract the negative effect of increased NRG1-ErbB4 signaling on the cellular mechanisms of learning and memory in individuals with schizophrenia, and therefore may motivate heavy smoking.

To investigate how having a child without a disability is related to maternal mental health and its predictors, we compared mothers of a single child with intellectual disabilities (single-child group, n = 117) and mothers of children with and without intellectual disabilities (multiple-children group, n = 457), in Japan. Compared to the multiple-children group, the single-child group had lower hope and social capital and poorer mental health; furthermore, 42.5% of them had decided not to have another child, despite desiring one. Hope was the strongest predictor of mental health in both groups but was more positively related to mental health in the multiple-children group. The fear of the possibility of the next child having a disability and receiving inadequate support were the obstacles for mothers who had decided not to have another child. Thus, greater support and more opportunities for obtaining adequate information about the implications of having another child may be needed.

Nicotinic and muscarinic ACh receptor agonists and acetylcholinesterase inhibitors (AChEIs) can enhance cognitive function. However, it is unknown whether a common signaling pathway is involved in the effect. Here, we show that in vivo administration of nicotine, AChEIs, and an m1 muscarinic (m1) agonist increase glutamate receptor, ionotropic, N-methyl D-aspartate 2B (GluN2B)-containing NMDA receptor (NR2B-NMDAR) responses, a necessary component in memory formation, in hippocampal CA1 pyramidal cells, and that coadministration of the m1 antagonist pirenzepine prevents the effect of cholinergic drugs. These observations suggest that the effect of nicotine is secondary to increased release of ACh via the activation of nicotinic ACh receptors (nAChRs) and involves m1 receptor activation through ACh. In vitro activation of m1 receptors causes the selective enhancement of NR2B-NMDAR responses in CA1 pyramidal cells, and in vivo exposure to cholinergic drugs occludes the in vitro effect. Furthermore, in vivo exposure to cholinergic drugs suppresses the potentiating effect of Src on NMDAR responses in vitro. These results suggest that exposure to cholinergic drugs maximally stimulates the m1/guanine nucleotide-binding protein subunit alpha q/PKC/proline-rich tyrosine kinase 2/Src signaling pathway for the potentiation of NMDAR responses in vivo, occluding the in vitro effects of m1 activation and Src. Thus, our results indicate not only that nAChRs, ACh, and m1 receptors are on the same pathway involving Src signaling but also that NR2B-NMDARs are a point of convergence of cholinergic and glutamatergic pathways involved in learning and memory.

Background: Although sense of coherence (SOC) moderates parental stress, the relationship between SOC, parental mental health and physical punishment of children with intellectual disabilities remains uncertain. The present authors describe parental physical punishment towards children with intellectual disabilities and investigate its related demographic characteristics, SOC and parental mental health. Materials and Methods: With the cooperation of Tokyo's 10 special needs schools, the present authors obtained 648 questionnaire responses from parents of children with intellectual disabilities. Results: Of the parents, 69.7% reported having physically punished their children with intellectual disabilities. This was positively associated with parents' younger age, poorer mental health, lower SOC, children's younger age, birth order (firstborns) and disability type (autism/pervasive developmental disorder). Conclusions: This is the first study supporting the relationship between SOC, mental health and physical punishment use among parents of children with intellectual disabilities. It may assist the development of strategies to prevent physical abuse of children with disabilities.

We investigated the role of inositol 1,4,5-trisphosphate receptors (IP3Rs) activated by preconditioning low-frequency afferent stimulation (LFS) in the subsequent induction of long-term potentiation (LTP) in CA1 neurons in hippocampal slices from mature guinea pigs. Induction of LTP in the field excitatory postsynaptic potential or the population spike by the delivery of high-frequency stimulation (HFS, a tetanus of 100 pulses at 100 Hz) to the Schaffer collateral-commissural pathway to CA1 neuron synapses was suppressed when group I metabotropic glutamate receptors (mGluRs) were activated prior to the delivery of HFS. LTP induction was also suppressed when CA1 synapses were preconditioned 60 min before HFS by LFS of 1000 pulses at 1 Hz and this effect was inhibited when the test stimulation delivered at 0.05 Hz was either halted or applied in the presence of an antagonist of N-methyl-D-aspartate receptors, group I mGluRs, or IP3Rs during a 20-min period from 20 to 40 min after the end of LFS. Furthermore, blockade of group I mGluRs or IP[subscript 3]Rs immediately before the delivery of HFS overcame the effects of the preconditioning LFS on LTP induction. These results suggest that, in CA1 neurons, after a preconditioning LFS, activation of group I mGluRs caused by the test stimulation results in IP[subscript 3]Rs activation that leads to a failure of LTP induction.

The role of inositol 1, 4, 5-trisphosphate receptors (IP3Rs) in long-term potentiation (LTP) and long-term depression (LTD) was studied in CA1 neurons in guinea pig hippocampal slices. In standard solution, short tetanic stimulation consisting of 15 pulses at 100 Hz induced LTP, while three short trains of low-frequency stimulation (LFS; 200 pulses at 1 Hz) at 18-min intervals or one long train of LFS (1000 pulses at 1 Hz) induced stable LTD in both the slope of the field EPSP (S-EPSP) and the amplitude of the population spike (A-PS). Bath application of 2-aminoethoxydiphenyl borate (2-APB), an IP3R antagonist, or of [alpha]-methyl-4-carboxyphenylglycine (MCPG), a wide-spectrum metabotropic glutamate receptor antagonist, during weak tetanic stimulation significantly increased the magnitude of the LTP in both the S-EPSP and A-PS. Three short trains of LFS or one long train of LFS delivered in the presence of 2-APB or MCPG did not induce LTD, but elicited LTP. Based on these results, we conclude that, in hippocampal CA1 neurons, IP3Rs play an important role in synaptic plasticity by attenuating LTP and facilitating LTD. (Contains 6 figures.)

To evaluate the intent and practice of condom use among Japanese HIV-positive men who have sex with men (MSM), a survey using anonymous questionnaires was carried out and 117 respondents were investigated. For anal sex and oral sex, respectively, 58.1% and 15.2% intended to use condoms and 47.2% and 12.4% used condoms all of the time. The intent of condom use decisively affected the practice of condom use and was closely related to the perceived risk level of HIV/sexually transmitted (STI) transmission. In anal sex, willingness to protect sexual partners from HIV infection was strongly related not only to the intent but also to the practice. Enhancement of willingness to protect oneself from STI was suggested to enhance willingness to protect his/her sexual partners from HIV infection with secondary enhancement of the intent or the practice of condom use. Specific support of MSM with HIV for improving the intent and practice of condom use is urgently needed.

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.socscimed.2005.10.032 Byline: Yuri Mizota (a), Megumi Ozawa (a), Yoshihiko Yamazaki (a), Yoji Inoue (b) Keywords: Hemophilia; Bereavement; HIV/AIDS; Posttraumatic stress disorder; Discrimination; Japan Abstract: This study sought to investigate the psychosocial difficulties faced by bereaved families of HIV-infected hemophiliacs in Japan, with the goal of clarifying appropriate ways to offer them support. Interviews were conducted with 46 family members from 36 families, and a written survey was mailed to 392 families. Valid responses from 225 families (307 family members) were analyzed (response rate 57.4%). We found that even at a mean 7-9 years after their family member's death, the bereaved continued to express deep feelings of sorrow and grief, and further, expressed strong feelings of resentment, anger, guilt and regret, anxiety over discrimination, and loneliness. Notably, 95% of the mothers endorsed feeling 'sorry for giving birth to a hemophiliac child'. Additionally, even after their family member's death, approximately 70% of the respondents continued to restrict their daily activities due to stigmatization or anxiety over discrimination. Finally, 59% of the respondents were found to have posttraumatic stress disorder-like symptoms according to the Impact of Event Scale-Revised, and 46% were found, according to General Health Questionnaire-12 (a measure of mental disorder) criteria, to suffer mental health problems. These results indicate that bereaved families of HIV-infected hemophiliacs in Japan have special characteristics and psychosocial needs, and still suffer significant psychosocial difficulties years after the bereavement. Author Affiliation: (a) Department of Health Sociology, Graduate School of Health Sciences & Nursing, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan (b) School of Nursing, Mie Prefectural College of Nursing, 1-1-1 Yumegaoka, Tsu-si Mie 514-0116, Japan

This research examined the experience of Amyotrophic Lateral Sclerosis (ALS) patients who depend on an invasive mechanical ventilator in Japan. We investigated their difficulties in expressing their needs, their desires and wishes, and their sources of support and happiness. We examined the relationship between these factors and patient demographics, and hope as an indicator of successful adaptation to the illness experience (assessed by the Herth Hope Index). Interview results guided the formation of an anonymous questionnaire distributed to patients by mail. We interviewed 27 patients and their families and surveyed 157 respondents with a questionnaire. Most patients experienced multiple categories of difficulties, which correlated with reduced hope. More severe physical symptoms correlated with more emotional and social difficulties. Notable findings included a high prevalence of unalleviated pain, fear or experience of ventilator difficulties, and fear of burdening others. Having more sources of psychosocial support and happiness was associated with greater hope. Living at home was associated with fewer social difficulties. No patients claimed additional sources of support without claiming family or professional caregiver support, suggesting their mediation may be crucial in maintaining other social connections. Users of computer communication reported more sources of support and happiness and less frustration from difficulty expressing themselves. The most common reported desires, following a cure for ALS, related to the happiness of the patients' families, and a desire not to burden them. We also found that invasive mechanical ventilation (IMV) had been initiated emergently in 30.1% of patients without patient or family consent. Our results provide an insight into the world of this challenged population, elucidating the difficulties they face, and clarifying the role of support and other factors in maintaining hope. We identify concrete areas to which increased attention should be directed in patient care. Keywords: Amyotrophic lateral sclerosis; Hope; Invasive mechanical ventilator; Expression; Psychosocial support; Difficulties; Japan

Although the triadic encounter of physician, patient, and an accompanying family member is a common phenomenon in geriatrics, previous research on the communication in medical encounters has primarily focused on dyadic interactions between physician and patient. This study aimed to explore the triadic communication and communication roles of patient companions in Japanese geriatric encounters. Among elderly patients aged 65 or over who were under continuous care of nine attending physicians at a university affiliated geriatric clinic in Tokyo, 63 accompanied patients and 82 unaccompanied patients were included for this study. The consultation was audiotape recorded and analyzed using the Roter Interaction Analysis System (RIAS) with additional categories developed to code aspects of companion communication. In dyadic encounters, the average proportions of physician's talk and patient's talk were 54% and 46%, respectively, while in triadic encounters the average talk proportions of physician, patient, and companion were 49%, 29%, and 22%. Companions made a significant contribution to the communication during the visit by providing information and asking the physician questions, as well as facilitating patient's talk. The companion's communication may influence not only the patient's but also the physician's communication. The patient's expectation of the companion's role during the visit and the companion's intention regarding their role were generally related to one another, and had positive associations with the companion's actual behavior during the visit. Nevertheless, companions often anticipated playing a more direct communication role during the visit, including the provision of information and asking of questions, than patients expected of them. Further investigation is needed to explore the communication dynamics in triads and dyads, and its relation to patient outcomes. Keywords: Companion; Elderly; Family; Japan; Physician-patient communication