Magnetic-optical dual-modality imaging monitoring chemotherapy efficacy of pancreatic ductal adenocarcinoma with a low-dose fibronectin-targeting Gd-based contrast agent.

PURPOSE: Pancreatic ductal adenocarcinoma (PDAC) is a lethal hypovascular tumor surrounded by dense fibrosis. Albumin-bound paclitaxel and gemcitabine (AG) chemotherapy is the mainstay of PDAC treatment through depleting peritumoral fibrosis and killing tumor cells; however, it remains challenging due to the lack of a noninvasive imaging method evaluating fibrotic changes during AG chemotherapy. In this study, we developed a dual-modality imaging platform that enables noninvasive, dynamic, and quantitative assessment of chemotherapy-induced fibrotic changes through near-infrared fluorescence molecular imaging (FMI) and magnetic resonance imaging (MRI) using an extradomain B fibronectin (EDB-FN)-targeted imaging probe (ZD2-Gd-DOTA-Cy7). METHODS: The ZD2-Gd-DOTA-Cy7 probe was constructed by conjugating a peptide (Cys-TVRTSAD) to Gd-DOTA and the near-infrared dye Cy7. PDAC murine xenograft models were intravenously injected with ZD2-Gd-DOTA-Cy7 at a Gd concentration of 0.05 mmol/kg or free Cy7 and Gd-DOTA as control. The normalized tumor background ratio (TBR) on FMI and the T1 reduction ratio on MRI were quantitatively analyzed. For models receiving AG chemotherapy or saline, MRI/FMI was performed before and after treatment. Histological analyses were performed for validation. RESULTS: The ZD2-Gd-DOTA-Cy7 concentration showed a linear correlation with the fluorescence intensity and T1 relaxation time in vitro. The optimal imaging time was 30 min after injection of the ZD2-Gd-DOTA-Cy7 (0.05 mmol/kg), only half of the clinic dosage of gadolinium. Additionally, ZD2-Gd-DOTA-Cy7 generated a 1.44-fold and 1.90-fold robust contrast enhancement compared with Cy7 (P < 0.05) and Gd-DOTA (P < 0.05), respectively. For AG chemotherapy monitoring, the T1 reduction ratio and normalized TBR in the fibrotic tumor areas were significantly increased by 1.99-fold (P < 0.05) and 1.78-fold (P < 0.05), respectively, in the control group compared with those in the AG group. CONCLUSION: MRI/FMI with a low dose of ZD2-Gd-DOTA-Cy7 enables sensitive imaging of PDAC and the quantitative assessment of fibrotic changes during AG chemotherapy, which shows potential clinical applications for precise diagnosis, post-treatment monitoring, and disease management.

Connection of social anxiety to impaired pattern of cognitive control and underlying motivational deficiencies: Evidence from event-related potentials.

Numerous studies have established a correlation between social anxiety and poor cognitive control. However, little is known about the cognitive control pattern of individuals with high social anxiety (HSAs) and the underlying mechanisms. Based on the Dual Mechanisms of Control framework and the Expected Value of Control theory, this study explored whether HSAs have an impaired cognitive control pattern (Experiment 1) and whether motivational deficiencies underlie the impaired control pattern (Experiment 2). In Experiment 1, 21 individuals with low social anxiety (LSAs) and 21 HSAs completed an AX-Continuous Performance Task. Results showed that HSAs had a smaller P3b amplitude than LSAs, indicating their weakened proactive control in the cue processing stage, but a larger contingent negative variation (CNV) on cue B as compensation for the negative effects of anxiety in the response preparation stage. No group difference was found in N2 and P3a amplitude on probes, suggesting that reactive control in HSAs was not affected compared to LSAs. In Experiment 2, 21 LSAs and 21 HSAs completed a cued-flanker task, where the likelihood of proactive control engagement was manipulated. The results revealed that HSAs exhibited motivation deficiencies in engaging in proactive control, as evidenced by P3b, CNV amplitude, and response times. These findings shed light on the impaired cognitive control pattern of HSAs and suggest that motivational deficiencies may be the crucial underlying factor.

A case report to understand the use of an evidence-based approach of prolonged grief therapy in Chinese culture.

Prolonged grief disorder (PGD) is a new diagnosis that may cause significant functional impairment. Prolonged grief therapy (PGT) is a manualized 16-session intervention, whose efficacy has been demonstrated in studies primarily from Western cultures. The current report aimed to present a case to illustrate the use of PGT in Chinese culture. The client was a bereaved adult suffering from PGD after the death of her mother ten years ago. Additionally, she lost her father three months ago. Questionnaires were completed before and after treatment. In-depth interview was conducted at a 3-month follow-up. The client's scores for grief, functional impairment, grief-related beliefs and avoidance, depression and insomnia all decreased substantially after treatment. The follow-up feedbacks indicated that the beneficial effects of PGT persisted in the client's life. This case report provides preliminary evidence that bereaved people in China could benefit greatly from PGT, with minimal cultural adaptation.

Sensitive and quantitative in vivo analysis of PD-L1 using magnetic particle imaging and imaging-guided immunotherapy.

PURPOSE: The programmed cell death protein-1 (PD-1) and programmed cell death ligand-1 (PD-L1) expression correlate with the immunotherapeutic response rate. The sensitive and non-invasive imaging of immune checkpoint biomarkers is favorable for the accurate detection and characterization, image-guided immunotherapy in cancer precision medicine. Magnetic particle imaging (MPI), as a novel and emerging imaging modality, possesses the advantages of high sensitivity, no image depth limitation, positive contrast, and absence of radiation. Hence, in this study, we performed the pioneer investigation of monitoring PD-L1 expression using MPI and the MPI-guided immunotherapy. METHODS: We developed anti-PD-L1 antibody (aPDL1)-conjugated magnetic fluorescent hybrid nanoparticles (MFNPs-aPDL1) and utilized MPI in combination with fluorescence imaging (FMI) to dynamically monitor and quantify PD-L1 expression in various tumors with different PD-L1 expression levels. The ex vivo real-time polymerase chain reaction (qPCR), western blotting, and immunofluorescence staining analysis were further performed to validate the in vivo imaging observation. Moreover, the MPI was further performed for the guidance of immunotherapy. RESULTS: Our data showed that PD-L1 expression can be specifically and sensitively monitored and quantified using MPI and FMI imaging methods, which were validated by ex vivo qPCR and western blotting analysis. In addition, MPI-guided PD-L1 immunotherapy can enhance the effectiveness of cancer immunotherapy. CONCLUSION: To our best knowledge, this is the pioneer study to utilize MPI in combination with a newly developed MFNPs-aPDL1 imaging probe to dynamically visualize and quantify PD-L1 expression in tumor microenvironment. This imaging strategy may facilitate the clinical optimization of immunotherapy management.

Fibronectin-targeting and metalloproteinase-activatable smart imaging probe for fluorescence imaging and image-guided surgery of breast cancer.

Residual lesions in the tumor bed have been a challenge for conventional white-light breast-conserving surgery. Meanwhile, lung micro-metastasis also requires improved detection methods. Intraoperative accurate identification and elimination of microscopic cancer can improve surgery prognosis. In this study, a smart fibronectin-targeting and metalloproteinase-activatable imaging probe CREKA-GK8-QC is developed. CREKA-GK8-QC possesses an average diameter of 21.7 ± 2.5 nm, excellent MMP-9 protein responsiveness and no obvious cytotoxicity. In vivo experiments demonstrate that NIR-I fluorescence imaging of CREKA-GK8-QC precisely detects orthotopic breast cancer and micro-metastatic lesions (nearly 1 mm) of lungs with excellent imaging contrast ratio and spatial resolution. More notably, fluorescence image-guided surgery facilitates complete resection and avoids residual lesions in the tumor bed, improving survival outcomes. We envision that our newly developed imaging probe shows superior capacity for specific and sensitive targeted imaging, as well as providing guidance for accurate surgical resection of breast cancer.

Understanding the Relationship Between Peer Support and Grief/Growth in Chinese Shidu Parents: The Roles of Internalized Stigma and Stigma Resistance.

In China, families who have lost their only child are called shidu families. Support from similar others, or peer support, can help bereaved individuals adapt by reducing negative consequences and promoting positive changes. However, no research has examined the mechanism that mediates the effect of peer support on postloss adaptation. This article investigates the mediating roles of internalized stigma and stigma resistance in the relationship between peer support and grief/growth among Chinese shidu parents. In total, 208 shidu parents completed the required measurements. Structural equation modeling was used to analyze the data. The results showed that peer support was negatively related to grief symptoms and positively linked with posttraumatic growth by reducing internalized stigma. The mediating effect existed only for informational support. The mediating role of stigma resistance was not significant. These findings provide valuable information for the mechanism of peer support and promote the development of interventions.

Novel fluorescent GLUT1 inhibitor for precision detection and fluorescence image-guided surgery in oral squamous cell carcinoma.

Early detection and complete resection of oral squamous cell carcinoma (OSCC) are crucial to improving patient survival and prognosis. However, specifically targeted imaging probes for OSCC detection are limited. Our study aimed to synthesize a novel near-infrared fluorescence (NIRF) probe for precision detection and fluorescence image-guided surgery in OSCC. Bioinformatics data indicated that glucose transporter 1 (GLUT1) is highly expressed in patients with OSCC. We demonstrated high and specific GLUT1 expression upon immunohistochemical staining of samples from 20 patients with OSCC. The specific expression of GLUT1 was further validated in both human OSCC cell lines and OSCC tumor xenografts. Based on these findings, the GLUT1 inhibitor WZB117 was utilized to synthesize a novel NIRF imaging probe, WZB117-IR820. The fluorescence molecular imaging data revealed that WZB117-IR820 could specifically bind to the tumor areas in an orthotopic OSCC mouse model after intravenous injection and could be further applied for precision fluorescence image-guided surgery with no residual tumor in the orthotopic CAL27-fLUC mouse tumor model. For further clinical translational application in patients with OSCC, precise delineation of OSCC tumor areas was achieved after topical application of the WZB117-IR820 imaging probe and was validated by histopathological and immunohistochemical analyses. In conclusion, we synthesized a novel fluorescent imaging probe, WZB117-IR820, which has potential clinical applications for early detection and fluorescence image-guided surgery in OSCC with no observable toxicity.

Sensitive and specific detection of breast cancer lymph node metastasis through dual-modality magnetic particle imaging and fluorescence molecular imaging: a preclinical evaluation.

PURPOSE: A sensitive and specific imaging method to detect metastatic cancer cells in lymph nodes to detect the early-stage breast cancer is still a challenge. The purpose of this study was to investigate a novel breast cancer-targeting and tumour microenvironment ATP-responsive superparamagnetic iron oxide nanoparticles (SPIOs) imaging probe (abbreviated as SPIOs@A-T) that was developed to detect lymph node metastasis through fluorescence molecular imaging (FMI) and magnetic particle imaging (MPI). METHODS: The conjugation of the targeted peptide CREKA and SPIOs was via linker sulfo-SMCC, while the dsDNA-Cy5.5 was modified on SPIOs through the conjugation between maleimide group in sulfo-SMCC and sulfydryl group in dsDNA-Cy5.5. SPIOs@A-T was characterised for its imaging properties, targeting ability and toxicity in vitro. Mice with metastatic lymph node (MLN) of breast cancer were established to evaluate the FMI and MPI imaging strategy in vivo. Healthy mice with normal lymph node (NLN) were used as control group. Histological examination and biosafety evaluation were performed for further assessment. RESULTS: After injection with SPIOs@A-T, the obvious high fluorescent intensity and MPI signal were observed in MLN group than those in NLN group. FMI can specifically light up MLN using an ATP-responsive fluorescence design. On the other hand, MPI could complement the limitation of imaging depth from FMI and could detect MLN more sensitively. Besides, the biosafety evaluation results showed SPIOs@A-T had no detectable biological toxicity. CONCLUSION: SPIOs@A-T imaging probe in combination with FMI and MPI can provide a promising novel method for the precise detection of MLN in vivo.

Association of the ST3GAL4 rs11220462 polymorphism and serum lipid levels in the Mulao and Han populations.

BACKGROUND: A previous genome-wide association study has displayed the association of the ST3 beta-galactoside alpha-2,3-sialytransferase 4 (ST3GAL4) gene variant and lipid traits in the individuals of European ancestry, but the reproducibility of this association has not been detected in the Chinese population. The present study was undertaken to detect the association of ST3GAL4 rs11220462 single nucleotide polymorphism (SNP) and several environmental factors with serum lipid profiles in the Mulao and Han populations. METHODS: A total of 700 unrelated individuals of Mulao nationality and 694 subjects of Han nationality were randomly selected from our previous stratified randomized samples. Genotypes of the SNP were determined via polymerase chain reaction and restriction fragment length polymorphism in combination with gel electrophoresis, and then verified by direct sequencing. RESULTS: Serum apolipoprotein (Apo) B levels were higher and the ApoAI/ApoB ratio was lower in Mulao than in Han (P<0.05-0.01). There were no significant differences in the genotypic and allelic frequencies of the ST3GAL4 rs11220462 SNP between the two ethnic groups or between males and females. The A allele carriers in both Mulao males and females had higher total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), and ApoB levels than the A allele non-carriers (P<0.05-0.01). The subjects with AA genotype in Han males but not in females had higher TC and triglyceride (TG) levels than the subjects with AG or GG genotype (P<0.01 for each). Multiple linear regression analyses showed that the levels of TC, LDL-C and ApoB in Mulao females; TC and LDL-C in Mulao males; and TC in Han males were correlated with the genotypes (P<0.05-0.001). Serum lipid parameters were also associated with several environmental factors in both ethnic groups (P<0.05 -0.001). CONCLUSIONS: The association of ST3GAL4 rs11220462 SNP and serum lipid levels was different between the Mulao and Han populations, suggesting that there may be a racial/ethnic-specific association, and/or sex-specific association between the ST3GAL4 rs11220462 SNP and serum lipid parameters in some ethnic groups.

RGD targeted magnetic ferrite nanoparticles enhance antitumor immunotherapeutic efficacy by activating STING signaling pathway.

Manganese has been used in tumor imaging for their ability to provide T1-weighted MRI signal. Recent research find Mn2+ can induce activation of the stimulator of interferon gene (STING) pathway to create an active and favorable tumor immune microenvironment. However, the direct injection of Mn2+ often results in toxicity. In this study, we developed an RGD targeted magnetic ferrite nanoparticle (RGD-MnFe2O4) to facilitate tumor targeted imaging and improve tumor immunotherapy. Magnetic resonance imaging and fluorescence molecular imaging were performed to monitor its in vivo biodistribution. We found that RGD-MnFe2O4 showed active tumor targeting and longer accumulation at tumor sites. Moreover, RGD-MnFe2O4 can activate STING pathway with low toxicity to enhance the PD-L1 expression. Furthermore, combining RGD-MnFe2O4 and anti-PD-L1 antibody (aPD-L1) can treat several types of immunogenic tumors through promoting the accumulation of tumor-infiltrating cytotoxic T cells. In general, our study provides a promising new strategy for the targeted and multifunctional theranostic nanoparticle for the improvement of tumor immunotherapy.

Elderly users' perceptions of signage systems from tertiary hospitals in Guangzhou.

Wayfinding in hospitals today is a significant challenge for urban residents, especially for the elderly. This study investigated the perceptions and attitudes of the elderly toward existing hospital signage systems to identify the wayfinding needs in the healthcare environment. This study collected 762 elderly participants' perceptions and personal preferences regarding 12 features of the existing signage systems in three hospitals in the Yuexiu, Haizhu, and Liwan districts of Guangzhou using a questionnaire methodology. The study further explored the differences in perceptions and preferences for signage based on the gender, age, and educational level of the elderly participants. The findings indicate that most of the elderly participants experienced becoming lost in the hospital; they typically chose to ask others for directions first, followed by using the signage system. Most of the elderly participants had positive attitudes toward the current hospital signage system. Furthermore, they emphasized the importance of the signage system's graphics, texts, colors, and updates, which directly affects the readability and comprehensibility of signs. We found gender differences in perceptions and attitudes toward signage; male participants had more positive attitudes toward the hospital signage systems than female participants. Additionally, consistent with previous findings, the older the age of participants, the less comprehension they had regarding signage graphic symbols. We also found that the more educated elderly participants were, the more understanding of signage they had. At the same time, however, they were less satisfied, which is possibly because the more educated they were, the more aware they were of signage issues.

Polysaccharides extraction from Ganoderma lucidum using a ternary deep eutectic solvents of choline chloride/guaiacol/lactic acid.

In this study, a purposefully formulated ternary deep eutectic solvents (DESs), consisting of choline chloride, guaiacol, and lactic acid in a molar ratio of 1:1:1, was synthesized for the extraction of polysaccharides from Ganoderma lucidum. The physicochemical properties of the synthesized DESs, including viscosity, density, pH, and hydrogen bonds, were comprehensively examined. Verification of the formation of the ternary DESs was accomplished through Fourier transform infrared and Nuclear magnetic resonance spectroscopies. Subsequently, response surface methodology was applied to optimize crucial parameters for polysaccharide extraction using DESs, resulting in a maximal extraction yield of 94.72 mg/g under the optimized conditions. Cyclic experiments demonstrated the commendable cyclic stability of the DESs, with a recovery rate exceeding 88 %. Furthermore, experiments on monosaccharide composition, molecular weight, and antioxidant activity of the isolated polysaccharides were conducted. Density functional theory was employed to gain insights into the molecular mechanism of polysaccharide extraction by DESs. The findings revealed a triple hydrogen bond interaction and a high binding energy (65.29 kcal/mol) between the DESs and glucose, highlighting their significant contribution to the high extraction effectiveness. This molecular-level understanding underscores the inherent superiority of DESs in the polysaccharide extraction processes, providing valuable insights for future applications in this field.

The effect of mind wandering on cognitive flexibility is mediated by boredom.

Cognitive theory of boredom presumes that boredom, an important potential indicator for self-dysregulation, represents to be the result of attention failure. And lapses of attention have been shown to act as a key signal in mind wandering (especially spontaneous mind wandering), which has been found to be positively associated with boredom. If both mind wandering and boredom concurrently occupy individuals' on-task processing resources, it would definitely influence their cognitive flexibility, which is an essential component for self-regulation. Until now, however, there has been little discussion about mind wandering, boredom, and cognitive flexibility at the same time. The present study investigated the hypothesis that boredom can mediate the effect of mind wandering on cognitive flexibility at trait-level by adopting a cross-sectional exploratory study design and anonymous structured questionnaires in three studies (N = 449,182 and 190 for Studies 1, 2 and 3, respectively). Correlation analysis demonstrated that mind wandering (especially spontaneous mind wandering) was positively related to boredom, and that cognitive flexibility was negatively related to mind wandering and boredom, respectively. Mediation analysis revealed an indirect effect of mind wandering (especially spontaneous mind wandering) on cognitive flexibility through boredom. In conclusion, these findings are useful to build a theoretical framework for future clinical practice. An implication of these findings is the possibility that efficacious strategies targeting at reducing boredom are needed to decrease the detriment effect of spontaneous mind wandering on cognitive flexibility.

Network analysis of PGD, PTSD and insomnia symptoms in Chinese shidu parents with PGD.

Background: Chinese shidu parents (bereaved parents over the age of 49 who have lost their only child) are potentially at a high risk of prolonged grief disorder (PGD), posttraumatic stress disorder (PTSD) and insomnia. Objective: The current study aimed to estimate three network models in 310 shidu parents who met the ICD-11 criteria for PGD: (1) a PGD network to identify central symptoms; (2) a comorbidity network to explore bridge symptoms between PGD and PTSD; (3) a comorbidity network to examine the associations between PGD and insomnia symptoms. Methods: The R-packages bootnet, qgraph and networktools were used to investigate the structure of network models and centrality indices of symptoms. In addition, robustness and significance analyses for the edge weights and the order of centrality were performed. Results: Emotional pain and numbness emerged as the most central symptoms in the PGD network. In the PGD-PTSD comorbidity network, the highest bridge strength symptoms were inability to trust others (PGD) and feeling upset (PTSD). Inability to trust others (PGD), avoidance (PGD), and impairment of life quality (insomnia) were possible bridge symptoms connecting PGD and insomnia. Conclusions: Reducing emotional pain and numbness may be a viable target in PGD interventions for shidu parents. Additionally, findings suggest that future studies could examine the role of inability to trust others and avoidance in PGD comorbidities. HIGHLIGHTS: • Emotional pain and numbness were the most influential symptoms in shidu parents with PGD. The role of PGD symptoms of inability to trust others and avoidance in the comorbidities of PGD with PTSD and insomnia might be worthy of further study.

Antecedentes: Los padres chinos shidu (padres en duelo mayores de 49 años que han perdido a su único hijo) tienen un alto riesgo potencial de presentar trastorno de duelo prolongado (TDP), trastorno de estrés postraumático (TEPT) e insomnio. Objetivo: El presente estudio tuvo como objetivo estimar tres modelos de redes en 310 padres shidu que cumplieron con los criterios CIE-11 para TDP: (1) una red TDP para identificar síntomas centrales; (2) una red de comorbilidad para explorar los síntomas puente entre TDP y TEPT; (3) una red de comorbilidad para examinar las asociaciones entre el TDP y síntomas del insomnio. Métodos: Se utilizaron los paquetes R bootnet, qgraph y networktools para investigar la estructura de los modelos de redes y los índices de centralidad de los síntomas. Además, se realizaron análisis de robustez y significancia para los pesos de borde y el orden de centralidad. Resultados: El dolor y el embotamiento emocional surgieron como los síntomas más centrales en la red TDP. En la red de comorbilidad TDP-TEPT, los síntomas fuerza de puente más altos fueron la incapacidad para confiar en los demás (TDP) y sentirse molesto (TEPT). La incapacidad para confiar en los demás (TDP), la evitación (TDP) y el deterioro de la calidad de vida (insomnio) fueron posibles síntomas puente que conectan el TDP y el insomnio. Conclusiones: Reducir el dolor y el embotamiento emocional puede ser un objetivo viable en las intervenciones de TDP para padres shidu. Además, los hallazgos sugieren que los estudios futuros podrían examinar el papel de la incapacidad para confiar en los demás y la evitación en las comorbilidades del TDP.

Grief and Posttraumatic Growth Among Chinese Bereaved Parents Who Lost Their Only Child: The Moderating Role of Interpersonal Loss.

Objective: Losing the only child is considered as the most severe kind of bereavement. It can trigger intense grief symptoms along with loss of psychosocial resources, but meanwhile, it can also lead to posttraumatic growth (PTG). The current study aimed to examine (a) whether a curvilinear relationship exists between grief and PTG and (b) the moderating role of resources-loss among Chinese bereaved parents who lost their only child (shidu parents). Methods: One hundred and ninety-nine shidu parents from five provinces completed the assessment packet covering prolonged grief symptoms and PTG, as well as resource loss. Hierarchical regression analyses were computed to examine the curvilinear relationship and the moderating effect of interpersonal loss and socio-economic loss. Results: There was no significant curvilinear relationship between grief and PTG in shidu parents. Under the high levels of interpersonal loss, shidu parents' PTG scores decreased as the severity of grief increased. However, the socio-economic loss did not show a significant moderating effect. Conclusion: The results of the current study did not show a significant curvilinear relationship between grief and PTG in shidu parents. High levels of grief coupled with high levels of interpersonal loss may interfere with their ability to achieve PTG. Therefore, evaluating degrees of interpersonal loss seems to be an important part of the treatment process when working with shidu parents. To facilitate their adaptation from a positive perspective, helping them maintain existing or develop new interpersonal relationships may be helpful.

Prevalence and associated factors of prolonged grief disorder in Chinese parents bereaved by losing their only child.

In China, parents who have lost their only child and remained childless are labelled Shidu () parents. Previous research suggests high levels of psychological distress in this population, yet little is known regarding the prevalence of prolonged grief disorder (PGD) based on the new ICD-11 formulation. The present study examined prevalence rates and associated factors of prolonged grief disorder in this population. 1030 Chinese Shidu parents (381 male, 643 female) who were recruited through convenient sampling completed questionnaires assessing grief severity. Multiple linear regression models were used to examine socio-demographic, loss-related and self-reported number of chronic physical conditions associated with PGD symptoms. Results showed prevalence rate was 35.5% based on the ICD-11 PGD criteria, which was almost twice as that of Prigerson et al. (2009) criteria. Younger age of parents, being a mother, living in a rural place, lower monthly income per capital, shorter time since loss and more comorbid chronic physical conditions were related to severer PGD symptoms. The present findings revealed high rates of PGD experienced by Chinese Shidu parents and identified key risk factors which can be used for future prevention or intervention designs in this population.

Culture-related grief beliefs of Chinese Shidu parents: Development and psychometric properties of a new scale.

Background: In China, parents whose only-child dies and who have no living or adopted child are called Shidu parents. Negative thinking is assumed to contribute to the development of emotional problems in bereavement. Because grief cognitions are likely influenced by the concepts of Chinese traditional culture (e.g., family continuation), Shidu parents may hold specific culture-related grief beliefs about themselves or the world, which, in turn, could impede their recovery. Objective: This study developed a questionnaire assessing the culture-related grief beliefs of Shidu parents and examined its psychometric properties. Methods: This newly developed questionnaire was administered to the combined sample of 313 Shidu parents. Exploratory (n = 164) and confirmatory factor analysis (n = 149) were conducted. Psychometric properties of the questionnaire were evaluated. Results: Exploratory factor analysis revealed three distinct factors (filial piety belief, destiny belief and perceived stigma), generating a nine-item culture-related grief beliefs of Shidu parents questionnaire (CBSQ). Confirmatory factor analysis verified the three-factor structure (χ2(24) = 39.103, p = 0.027, χ2/df = 1.630, CFI = .980, TLI = .970, RMSEA = .065, SRMR = .052). Internal consistency and temporal stability were adequate. Convergent, discriminant and concurrent validity were supported. Conclusions: This study highlights the importance of extending the concept of grief cognitions to include culture-specific beliefs, and provides a first measurement tool to assess culture-related grief beliefs after only-child loss, which can be used in future research with Shidu parents.

Antecedentes: En China, los padres quienes fallece su único hijo y no tienen hijos vivos o adoptados son llamados padres Shidu. Se asume que el pensamiento negativo contribuye a problemas emocionales en el duelo. Dado que las cogniciones del duelo son probablemente influenciadas por los conceptos de la cultura tradicional China (por ejemplo, continuación de la familia), los padres Shidu pueden mantener creencias del duelo específicas relacionadas a la cultura acerca de sí mismos o el mundo, las cuales, a su vez, podrían impedir su recuperación.Objetivo: Este estudio desarrolló un cuestionario de evaluación de las creencias del duelo relacionadas a la cultura de los padres Shidu y examinó sus propiedades psicométricas.Métodos: Este cuestionario recientemente desarrollado fue administrado a la muestra combinada de 313 padres Shidu. Se realizaron análisis factoriales exploratorio (n=164) y confirmatorio (n=149). Se evaluó las propiedades psicométricas del cuestionario.Resultados: El análisis factorial exploratorio reveló tres factores distintos (creencia de devoción filial, creencia en el destino y estigma percibido), generando un cuestionario de 9 ítems de creencias del duelo relacionadas a la cultura en padres Shidu (CBSQ, por su sigla en inglés). El análisis de factores confirmatorio verificó la estructura de tres factores (χ2(24) = 39.103, p= 0.027, χ2/df = 1.630, CFI = .980, TLI = .970, RMSEA = .065, SRMR = .052). La consistencia interna y estabilidad temporal fueron adecuadas. Fueron corroboradas la validez convergente, discriminante y concurrente.Conclusiones: Este estudio destaca la importancia de extender el concepto de cogniciones del duelo para incluir creencias específicas a la cultura, y provee una primera herramienta de medición para evaluar las creencias del duelo específicas a la cultura luego de la pérdida de un hijo único, el que puede ser usado en investigaciones futuras con padres Shidu.

Mechanisms of attentional selection bias for threatening emotions of anger and disgust in individuals with high-trait anxiety.

There are still some controversies that attentional bias to negative emotions in individuals with high-trait anxiety (HTA), as compare with those with low-trait anxiety (LTA), occurs in the engagement or disengagement facet of attentional selectivity and whether this attentional bias is affected by negative emotional types. In this study, we explored the different attentional selectivity mechanisms for threatening emotions of anger and disgust between individuals with HTA and LTA using the variant attentional-probe paradigm. The results showed that under the engagement condition, the HTA group's attentional bias index of the anger mood was negative and was significantly less than the disgusting mood (positive) and that the P1 was smaller with angry faces as compared with neutral faces, which was separate from the results of the disgusted faces, having a significant difference with neutral faces on P1 component. In the LTA group, under the disengagement condition, the attentional bias index of the disgusting mood was significantly bigger than the attentional bias index of the anger mood. Moreover, the P1 of the disgusted faces was significantly bigger than the P1 of the angry faces. The topographical maps were also made to reveal the different neural underpinnings. The results suggested that there were different mechanisms of selective attentional bias for threatening emotions of anger and disgust in individuals with HTA. HTA individuals were characterized by facilitated attentional engagement with angry faces and impaired attentional engagement with disgusted faces. LTA individuals had different neural underpinnings and had impaired attentional disengagement with disgusted faces.

Latent profiles of physical and psychological outcomes of bereaved parents in China who lost their only child.

Background: Along with the implementation of the one-child policy in China, a special group of bereaved parents called 'shiduer' (), meaning parents bereaved by the loss of their only child, emerged. Although previous research has examined the physical and psychological health of this population, individual differences in physical and psychological outcomes are still not well understood. Objective: This study aimed to identify heterogenous subgroups of Chinese bereaved parents who lost their only child based on the physical and psychological health of this population as well as the predictive factors of each subgroup. Method: Latent profile analysis was used to explore underlying patterns of physical and psychological indicators including subjective physical health, negative psychological outcomes (i.e. depression, post-traumatic stress disorder and prolonged grief disorder) and positive psychological outcomes (i.e. post-traumatic growth) among a sample of Chinese bereaved parents who lost their only child (N = 536). A three-step approach was used to examine the effects of covariates including quality of spousal relationship and recruitment channels on psychological and physical outcomes. Results: A three-profile model identified severity-based groupings of a 'resilient' subgroup (n = 153), a 'coping' subgroup (n = 338) and a 'dysfunctional' subgroup (n = 45). Less satisfaction with spousal relationship and recruitment from institutions in the community and online self-help groups (vs. offline support groups) are associated with the membership of the 'coping' or 'dysfunctional' subgroup compared to the 'resilient' subgroup. Conclusions: There is heterogeneity regarding the physical and psychological health of Chinese parents after losing their only child. The predictive effects of the quality of spousal relationship and the recruitment channels could provide directions for professional intervention.

Resumen del Artículo: Antecedentes: Junto a la implementación de la política de un solo hijo en China, surgió un grupo especial de padres afligidos llamado 'shiduer' (失 独 者), que significa padres despojados (en duelo) por la pérdida de su único hijo. Aunque investigaciones previas han examinado la salud física y psicológica de esta población, las diferencias individuales en los resultados físicos y psicológicos aún no son bien comprendidos.Método: Se usó el análisis de perfil latente para explorar patrones subyacentes de indicadores físicos y psicológicos que incluían salud física subjetiva, resultados psicológicos negativos (es decir, depresión, trastorno de estrés postraumático y trastorno de duelo prolongado) y resultados psicológicos positivos (es decir, crecimiento postraumático) en una muestra de padres chinos en duelo que perdieron a su único hijo (N = 536). Se utilizó un enfoque de tres pasos para examinar los efectos de las covariables, incluida la calidad de la relación conyugal y las vías de reclutamiento, en los resultados psicológicos y físicos.Resultados: Un modelo de tres perfiles identificó agrupaciones basadas en la gravedad mostrando un subgrupo 'resilente' (n = 153), un subgrupo 'de afrontamiento' (n = 338) y un subgrupo 'disfuncional' (n = 45). La menor satisfacción con la relación conyugal y el reclutamiento de instituciones en la comunidad y grupos de autoayuda en línea (en comparación con grupos de apoyo presenciales) se asociaron con la pertenencia al subgrupo 'afrontamiento' o 'disfuncional' en comparación con el subgrupo 'resilente'.Conclusiones: Existe heterogeneidad con respecto a la salud física y psicológica de los padres chinos después de perder a su único hijo. Los efectos predictivos de la calidad de la relación conyugal y las vías de reclutamiento podrían proporcionar instrucciones para la intervención profesional.

Electrophysiological Correlates of Emotional Source Memory in High-Trait-Anxiety Individuals.

The interaction between recognition memory and emotion has become a research hotspot in recent years. Dual process theory posits that familiarity and recollection are two separate processes contributing to recognition memory, but further experimental evidence is needed. The present study explored the emotional context effects on successful and unsuccessful source retrieval amongst 15 high-trait-anxiety college students by using event-related potentials (ERPs) measurement. During study, a happy, fearful, or neutral face picture first was displayed, then a Chinese word was superimposed centrally on the picture and subjects were asked to remember the word and the corresponding type of picture. During the test participants were instructed to press one of four buttons to indicate whether the displayed word was an old or new word. And then, for the old word, indicate whether it had been shown with a fearful, happy, or neutral face during the study. ERPs were generally more positive for remembered words than for new words and the ERP difference was termed as an old/new effect. It was found that, for successful source retrieval (it meant both the item and the source were remembered accurately) between 500 and 700 ms (corresponding to a late positive component, LPC), there were significant old/new effects in all contexts. However, for unsuccessful source retrieval (it meant the correct recognition of old items matched with incorrect source attribution), there were no significant old/new effects in happy and neutral contexts, though significant old/new effects were observed in the fearful context. Between 700 and 1200 ms (corresponding to a late slow wave, LSW), there were significant old/new effects for successful source retrieval in happy and neutral contexts. However, in the fearful context, the old/new effects were reversed, ERPs were more negative for successful source retrieval compared to correct rejections. Moreover, there were significant emotion effects for successful source retrieval at this time window. Further analysis showed ERPs of old items were more negative in fearful context than in neutral context. The results showed that early unsuccessful fearful source retrieval processes (related to familiarity) were enhanced, but late successful fearful source retrieval processes during source retrieval monitoring (related to recollection) were weakened. This provided preliminary evidence for the dual processing theory.