H19 and breast carcinoma: Evaluation of exosomal lncRNA-H19 in breast cancer patients demonstrated that patients who are resistant to doxorubicin show higher expression levels of exosomal lncRNA-H19 in comparison with parental cells, suggesting that the exosomal lncRNA-H19 can be considered as a biomarker for monitoring doxorubicin resistance in breast cancer [131].