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Exosomes are extracellular vesicles secreted by various cells, mainly composed of lipid bilayers without organelles. In recent years, an increasing number of researchers have focused on the use of exosomes for drug delivery. Targeted drug delivery in the body is a promising method for treating many refractory diseases such as tumors and Alzheimer's disease (AD). Finding a suitable drug delivery carrier in the body has become a popular research today. In various drug delivery studies, the exosomes secreted by mesenchymal stem cells (MSC-EXOs) have been broadly researched due to their immune properties, tumor-homing properties, and elastic properties. While MSC-EXOs have apparent advantages, some unresolved problems also exist. This article reviews the studies on MSC-EXOs for drug delivery, summarizes the characteristics of MSC-EXOs, and introduces the primary production and purification methods and drug loading methods to provide solutions for existing problems and suggestions for future studies.

Objective. Effective communication for cancer patients and/or caregivers can meet information needs, reduce caregiver burden, improve physical and mental health, and promote intimacy. The aim of this review was to identify the communication needs of cancer patients and/or caregivers and to explore their specific communication needs to guide the development of future communication interventions. Methods. Chinese and English databases were systematically searched from January 2010 to October 2019, including MEDLINE, CINAHL, PubMed, and the China Academic Journal Full-text Database. The key search terms used were “cancer” or “carcinoma” or “oncology” AND “patient” or “caregiver” or “carer” AND “communication” or “discussion” or “talk” AND “need” or “needs” or “desire.”. Results. A total of 26 articles was identified and included in this review. The findings revealed the needs of cancer patients and/or caregivers in terms of communication target, content, style, timing, and preferences. Communication targets included health professionals, peers, caregivers, and patients. Communication content included illness-related, emotional support, daily life, sexuality, death, and a way to communicate with health professionals. Communication style needed to be expressed through such things as language and communication atmosphere. Communication timing mainly referred to before treatment and approaching death. Communication preferences were related to factors such as demographics and ethnic origin. Conclusions. Cancer patients and/or caregivers have different communication needs in terms of target, content, style, and communication timing. A better understanding of the unique communication needs of patients and/or caregivers will offer health professionals detailed information on designing appropriate interventions to support cancer patients and caregivers.

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