Increased intracellular crowding during hyperosmotic stress.

Hyperosmotic stress activates in live cells numerous processes and also promotes intracellular protein/RNA aggregation and phase separation. However, the time course and the extent of these changes remain largely uncharacterized. To investigate dynamic changes in intracellular macromolecular crowding (MMC) induced by hyperosmotic stress in live cells, we used fluorescence lifetime imaging microscopy and fluorescence correlation spectroscopy (FCS) to quantify changes in the local environment by measuring the fluorescence lifetime and the diffusion of the monomeric enhanced green fluorescent protein (eGFP), respectively. Real-time monitoring of eGFP fluorescence lifetime showed that a faster response to environmental changes due to MMC is observed than when measuring the acceptor/donor emission ratio using the MMC-sensitive Förster resonance energy transfer sensor (GimRET). This suggests that eGFP molecular electronic states and/or collision frequency are affected by changes in the immediate surroundings due to MMC without requiring conformational changes as is the case for the GimRET sensor. Furthermore, eGFP diffusion assessed by FCS indicated higher intracellular viscosity due to increased MMC during hyperosmotic stress. Our findings reveal that changes in eGFP fluorescence lifetime and diffusion are early indicators of elevated intracellular MMC. Our approach can therefore be used to reveal in live cells short-lived transient states through which MMC builds over time, which could not be observed when measuring changes in other physical properties that occur at slower time scales.

Effects of the appearance care program for breast cancer patients receiving chemotherapy: A mixed method study.

BACKGROUND: Treatment of breast cancer entails surgery, often followed by chemotherapy. Alopecia is a major, intractable side effect with potentially profound impacts on appearance. We developed a nurse-facilitated program targeting appearance-related symptoms. AIMS: This study explored the effects of the appearance care program on quality of life (QOL). The program was delivered across three sessions, each involving personal reflections on appearance concerns, short lectures on skincare and makeover techniques, and small group discussions. METHOD AND RESULTS: Seventy-two women who attended the appearance care program were invited to participate. We employed a mixed-method design combining quantitative and qualitative methods. QOL instruments were used to measure effects of the program at the first and final sessions and at a one-month follow-up. The qualitative data were collected as open-ended notes regarding participants' perception of the program at the final session and at a one-month follow-up. Fifty-seven women completed all three sessions. Of them, 55 participated in this study. Their mean age was 46.4 years; 39 (70.9%) had partners, and 34 (61.8%) had children. Most participants experienced hair loss at one-month post-program; however, cancer-specific QOL improved after attending the program. Patients' experience of fatigue and weakness may explain observations of decreased physical well-being. Emotional well-being continued to increase 1 month following the program, while social and functional well-being was consistent. Participants felt empowered by the information on skincare and cosmetic techniques and valued the intimate support from the group members facing similar circumstances. CONCLUSIONS: This study showed that the appearance care program increased or maintained the well-being of participants. Findings suggest the appearance care program which promoted group sharing experiences empowered participants and may have enhanced their coping strategies.