Microsatellite instability(MSI) is a phenomenon in which new microsatellite alleles arise due to impaired or defective DNA mismatch repair in tumor cells. As one of the recognized important oncogenic pathways, MSI can lead to further disorder and mutation of tumor cell genome, thereby promoting the occurrence and development of malignant tumors. Werner syndrome protein (WRN) helicase, belonging to the RecQ family, plays an important role in DNA repair and maintenance of genome stability. Recent studies have discovered that the growth of malignancies with MSI is significantly reliant on WRN helicase, suggesting that targeting WRN could be a promising approach for developing therapies against MSI-associated cancers. Therefore, this review aims to conduct a systematic review of the structure and biological functions of WRN helicase, which is a new target for synthetic lethality. Additionally, latest progress on WRN helicase inhibitors are overviewed with the goal of providing a reference for the treatment of MSI malignant tumors and the development of WRN inhibitors.

Objective To investigate the clinical effect of continuous language rehabilitation nursing on the language function in patients with stroke motor aphasia. Methods A total of 60 motor aphasia patients with a brain stroke were recruited and divided into experimental group and control group with 30 cases each by random digits table method. The control group was treated with the routine stroke care in traditional Chinese medicine, while the experimental group with the continuing language rehabilitation nursing base on the routine stroke care. The language function of both groups were detected by the Chinese Rehabilitation Research Center Standard Aphasia Examination before and after 3 months treatment, and a survey of nursing satisfaction of patients when discharged was conducted. Results The right rate of hear and understand, retelling, say, read aloud, reading comprehension, transcription, description, dictation, calculation in the Chinese Rehabilitation Research Center Standard Aphasia Examination was (44.35 ± 18.69), (32.37 ± 22.25), (21.49 ± 14.91), (27.63 ± 12.54), (46.87 ± 15.30), (14.25 ± 6.11), (7.33±3.23), (11.63±4.82), (18.93±6.82)%before the treatment and (62.14±10.81), (55.36±19.53), (41.42 ± 13.75), (59.16 ± 11.05), (55.57 ± 13.90), (32.39 ± 7.12), (9.73 ± 3.92), (27.45 ± 4.71), (37.46 ± 6.91)%after the treatment in the experimental group, except for description, the differences were significant ( t=2.096-14.540, P<0.01 or 0.05). The right rate of hear and understand, retelling, say, read aloud, reading comprehension, transcription, description, dictation, calculation in the Chinese Rehabilitation Research Center Standard Aphasia Examination was (43.86±15.89), (34.28±20.27), (22.84±15.40), (28.63±12.45), (47.23±11.30), (13.40±6.24), (7.27±3.70), (11.10±4.73), (19.50±6.80)%before the treatment and (49.46± 14.27), (42.36±20.58), (30.33±13.36), (40.31±11.88), (49.97±10.13), (15.37±5.59), (8.50±3.74), (12.83± 4.36), (21.47 ± 7.74)% after the treatment in the control group, the differences of hear and understand, retelling, say, read aloud were significant (t=2.263-3.991, P<0.05 or 0.01). There were significant differences in hear and understand, retelling, say, read aloud, transcription, dictation, calculation after the treatment between two groups (t=2.510-10.298, all P<0.05). The score of satisfaction was (94.36 ± 5.55) in the experimental group and (88.25 ± 5.46) points in the control group, and there was significant difference (t=4.299, P<0.01). Conclusions Continuing language rehabilitation nursing can improve the recovery of the language function of the motor aphasia patients with a brain stroke.