Synthesis and antitumor activity evaluation of maleopimaric acid N-aryl imide atropisomers.

Maleopimaric acid N-aryl imides (2) and methyl maleopimaric acid N-aryl imides (3) were designed and synthesized. Their atropisomers (A and B) were separated into their enantiomeric pure forms and the anti-proliferative activity was tested against NCI, A549, Hep G-2, MGC-803 and Hct-116 cell lines, respectively. A significant difference in the level of cytotoxicity was observed between R and S conformers. Atropisomers A with an R configuration exhibited significant toxicity (the IC50 values ranging from 7.51 to 32.1 µM). Further experiments proved that antitumor activity of 2A was achieved through the induction of cell apoptosis by G1 cell-cycle arrest.

[Correlative analysis of cervical curvature and atlantoaxial instability].

OBJECTIVE: To investigate the correlation between the changes of cervical curvature and atlantoaxial instability. METHODS: The correlation between the changes of cervical curvature and atlantoaxial instability was retrospectively studied in 50 outpatients with abnormal cervical curvature (abnormal cervical curvature group) from January 2018 to December 2019. There were 24 males and 26 females in abnormal cervical curvature group, aged from 18 to 42 years old with an average of(30.62±5.83) years. And 53 patients with normal cervical curvature (normal cervical curvature group) during the same period were matched, including 23 males and 30 females, aged from 21 to 44 years with an average of(31.98±6.11) years. Cervical spine X-ray films of 103 patients were taken in lateral position and open mouth position. Cervical curvature and variance of bilateral lateral atlanto-dental space(VBLADS) were measured and recorded, Pearson correlation coefficient analysis was used to study the correlation between the changes of cervical curvature and atlantoaxial instability. RESULTS: Atlantoaxial joint instability accounted for 39.6%(21/53) in normal cervical curvature group and 84.0%(42/50) in abnormal cervical curvature group. There was significant difference between two groups(P<0.01). VBLADS in abnormal cervical curvature group was (1.79±1.01) mm, which was significantly higher than that in normal cervical curvature group(0.55±0.75) mm(P<0.01). Pearson correlation coefficient analysis showed that the size of cervical curvature was negatively correlated with VBLADS. CONCLUSION: Cervical curvature straightening and inverse arch are the cause of atlantoaxial instability, the smaller the cervical curvature, the more serious the atlantoaxial instability.

[Application of ultrasound in treating postpartum pubis symphysis diastasis by bone setting manipulation].

OBJECTIVE: To explore application value of ultrasound in treating postpartum pubis symphysis diastasis by bone setting manipulation. METHODS: Retrospective analysis was performed on 30 patients (case group) with postpartum pubis symphysis diastasis diagnosed in Wangjing Hospital, China Academy of Chinese Medical Sciences from June 2017 to January 2021, aged from 21 to 43 years old, with an average of (33.0±3.5) years old. The main clinical manifestations were mobility disorders such as turning over and walking, and all patients were treated by bone setting manipulation. Before and after treatment, pain and degree of pubic symphysis separation were evaluated by visual analogue scale(VAS) and ultrasonography. In normal group, 30 menopausal women aged from 49 to 59 years old with an average of(54.0±2.9) years old who wanted to remove intra uterine device(IUD) and were underwent conventional pelvic plain radiographswere selected, and the width of pubic symphysis space was measured by ultrasound and plain radiographs. RESULTS: In normal group, the width of pubic symphysis was about (5.2±1.7) mm by ultrasonography, X-ray measurement was (5.0±2.1) mm, and showed no difference(P>0.05).In case group, the width of pubic symphysis measured by ultrasound before manipulation was about (9.5±1.8) mm, VAS was 6.05(5.27, 6.80) scores;while the width of pubic symphysis measured by ultrasound before manipulation was about (5.8±1.3) mm, VAS was 0(0, 0) scores, and there were statistical difference before and after manipulation (P<0.05). CONCLUSION: Ultrasound is examation method with safe, non radioactive, easy to repeat for many times, could clearly show cartilage, ligament and bone structure around pubic symphysis, and is more suitable for the imaging diagnosis of postpartum pubis symphysis diastasis, which provide quantitative imaging basis for clinical evaluation of the curative effect of bone setting manipulation in treating postpartum pubis symphysis diastasis.

[Application value of high-frequency ultrasound on the diagnosis of rotator cuff tears].

OBJECTIVE: To study the diagnostic value of high frequency ultrasound in diagnosing rotator cuff tears. METHODS: Total 37 patients (37 shoulders) with rotator cuff tears were detected by ultrasound, MRI examination and arthroscopy retrospectively. Among the patients,21 patients were male and 16 patients were female. The average age was 64 years old (ranged, 51 to 75 years old). High frequency ultrasonography and MRI were applied to exam the shoulder under the standardizeds to point types and compare with arthroscopy results. RESULTS: Thirty-two shoulders were diagnosed as rotator cuff injury by ultrasound, and 5 shoulders were detected as normal rotator cuff by ultrasound. Twenty-nine shoulders were diagnosed as rotator cuff injury by MRI, and 8 shoulders were detected as normal rotator cuff by MRI. Thirty-three shoulders were diagnosed as rotator cuff injury during the operation, and 4 shoulders were regarded as rotator cuff during the operation. The sensitivity of ultrasound diagnosis was 93.4% (31/33), and specific degree was 75.0%(3/4). The sensitivity of MRI diagnosis was 87.5% (28/32), and specific degree was 80.0% (4/5). CONCLUSION: High frequency ultrasound in the diagnosis of rotator cuff tears injuries has a high sensitivity and specificity. High frequency ultrasound can be used as a routine method to diagnose rotator cuff tears injuries.