Objective To explore the use of ChatGPT (Chat Generative Pre-trained Transformer) in pediatric diagnosis, treatment and doctor-patient communication, evaluate the professionalism and accuracy of the medical advice provided, and assess its ability to provide psychological support. Methods The knowledge databases of ChatGPT 3.5 and 4.0 versions as of April 2023 were selected. A total of 30 diagnosis and treatment questions and 10 doctor-patient communication questions regarding the pediatric urinary system were submitted to ChatGPT versions 3.5 and 4.0, and the answers to ChatGPT were evaluated. Results The answers to the 40 questions answered by ChatGPT versions 3.5 and 4.0 all reached the qualified level. The answers to 30 diagnostic and treatment questions in ChatGPT 4.0 version were superior to those in ChatGPT 3.5 version (P=0.024). There was no statistically significant difference in the answers to the 10 doctor-patient communication questions answered by ChatGPT 3.5 and 4.0 versions (P=0.727). For prevention, single symptom, and disease diagnosis and treatment questions, ChatGPT’s answer scores were relatively high. For questions related to the diagnosis and treatment of complex medical conditions, ChatGPT’s answer scores were relatively low. Conclusion ChatGPT has certain value in assisting pediatric diagnosis, treatment and doctor-patient communication, but the medical advice provided by ChatGPT cannot completely replace the professional judgment and personal care of doctors.
Objective To establish a safe, effective, and economic feeder-free culture system which is suitable for the culture of human parthenogenetic embryonic stem cells (hPESCs) in vitro. Methods hPESCs were cultured with mTeSRTMl medium (control group) and human foreskin fibroblasts-conditional medium (hFFs-CM) (experimental group). The growth status of hPESCs in both feeder-free culture systems were observed with inverted microscope. Alkaline phosphatase (ALP) analysis and karyotype analysis were used to study the biological characteristics of hPESCs. The expression of hPESCs pluripotent marker Oct-4 was analyzed by RT-PCR. Differentiation experiment in vivo and in vitro was applied to observe the differentiation potential of hPESCs into three germ layers. Results hPESCs had regular morphology with difficulty in differentiation in both culture systems. No obvious difference was observed in morphology and expansion speed of hPESCs between 2 groups. After subcultured for 15 passages in vitro, hPESCs in 2 groups could maintain normal female diploid karyotype 46, XX and pluripotency. The expression of Oct-4 mRNA was positive in 2 groups. hPESCs in 2 groups could form embryonic body in differentiation experiment in vitro and could develop into teratomas containing three germ layers in nude mice. Conclusion Feeder-free culture system of hFFs-CM can sustain the growth of hPESCs and keep hPESCs undifferentiated state for long. A feeder-free culture system of hPESCs is successfully established, which can support the growth of hPESCs, reduce the contamination from animals, decrease the cost of culture, and satisfy the clinical large-scale application.