Gastrointestinal tumors （GTs）， including colorectal cancer， gastric cancer， liver cancer， pancreatic cancer， and esophageal cancer， are increasing in incidence worldwide and have become one of the major diseases threatening human health. Tumor stem cells （TSCs）， an undifferentiated subpopulation within tumor tissues， possess biological characteristics such as self-renewal， multidirectional differentiation， high tumorigenicity， and resistance to radiochemotherapy. They play an important role in the occurrence， progression， recurrence， and metastasis of GTs and have increasingly become a research hotspot in GT treatment. Although modern medicine has made remarkable progress， there remain many problems in therapeutic approaches targeting TSCs. In this context， traditional Chinese medicine （TCM）， with its favorable safety profile and multi-target mechanisms， has shown potential advantages and value in regulating TSCs. It can reduce TSC drug resistance， enhance the sensitivity of tumor cells to chemotherapeutic agents， inhibit tumor growth and metastasis， and has shown unique advantages in improving the quality of life and prolonging the survival of GT patients. Studies have found that active components of Chinese medicine， such as terpenoids， polyphenols， flavonoids， glycosides， and quinones， and Chinese medicine compound formulas， including Zuojin pills， Sijunzi decoction， Biejiajian pills， and Xuanfu Daizhe decoction， can inhibit TSCs-related signaling pathways such as the Notch signaling pathway， the Wnt/β-catenin signaling pathway， the phosphatidylinositol 3-kinase/protein kinase B （PI3K/Akt） signaling pathway， and the Hippo signaling pathway. They also reduce the expression of TSC surface markers， including sex-determining region Y-box 2 （SOX2）， sex-determining region Y-box 9 （SOX9）， octamer-binding transcription factor 4 （OCT4）， prominin-1 （CD133）， cluster of differentiation 44 （CD44）， cluster of differentiation 24 （CD24）， and thyroid transmembrane protein 1 （CD90）， thereby hindering TSC differentiation， accelerating their metabolic processes， improving the tumor microenvironment， and consequently inhibiting GT growth. This study collects and analyzes recent research on the regulation of TSCs by TCM in the treatment of GT， aiming to provide a new theoretical basis for tumor therapy with TCM， expand its application in the comprehensive treatment of GT， and offer new therapeutic ideas and methods for clinical practice.

Objective To construct a high-quality practical teaching system of rehabilitation majors for undergraduate based on World Health Organization rehabilitation competence framework(RCF). Methods Using the principles and methods of RCF,the competency requirements for rehabilitation therapy were ana-lyzed and a practical teaching system suitable for undergraduate education in rehabilitation therapy was construct-ed. Results The rehabilitation practice education were constructed as practice courses,clinical practice and social service practice,and the practice education modules and objectives were discussed based on RCF. Conclusion A competency-oriented rehabilitation practice education system has been constructed based on RCF,includ-ing practice courses,clinical practice and social service practice.

Objective To explore the differences in MRI signs between traumatic and non-traumatic rotator cuff tears and their correlation with the degree of rotator cuff tears.Methods A retrospective analysis was conducted on the clinical data and MRI man-ifestations of 82 patients in the trauma group and 80 patients in the non-trauma group with rotator cuff tears confirmed by arthroscopy.MRI indicators included 10 parameters:the degree of rotator cuff tear,tendon kinking-sign,tendon retraction,muscle edema,fatty degeneration,muscle atrophy,long head of the biceps tendon injury,acromion type,acromio-humeral distance(AHD),and lateral acro-mion angle(LAA).The clinical data and MRI indicators of the two groups were compared,and the correlation between MRI indica-tors and the degree of rotator cuff tears was analyzed.Results There were no significant difference in age and gender between the trauma group and the non-trauma group(P＞0.05),but the onset time of symptoms was significantly shorter in the trauma group compared to the non-trauma group(30 d vs 135 d,P＜0.001).Muscle edema,tendon kinking-sign,and long head of the biceps tendon injury were more common in the trauma group(P＜0.05),while fatty degeneration and type Ⅲ acromion were more common in the non-trauma group.The average AHD was smaller in the non-trauma group compared to the trauma group(P＜0.001).In addition,type Ⅲ acromion was more commonly seen in full-thickness rotator cuff tears,and AHD value was negatively correlated with the degree of rotator cuff tears(P＜0.05).Conclusion Muscle edema,tendon kinking-sign,and long head of the biceps tendon injury on MRI are highly suggestive of traumatic rotator cuff tears,while fatty degeneration,type Ⅲ acromion and smaller AHD indicate non-traumatic rotator cuff tears.Type Ⅲ acromion and decreased AHD increase the risk of full-thickness rotator cuff tears.

Objective:To explore the application of energy spectrum CT single energy combined with adaptive statistical iterative reconstruction-Veo (ASIR-V) for optimizing inferior vena cava imaging.Methods:Thirty patients with negative diagnosis or minimal inferior vena cava lesions who underwent CT venography (CTV) of inferior vena cava in the Second Hospital of Harbin Medical University from August 2021 to April 2022 were enrolled in the study, including 11 males and 19 females with the age of (55.4±8.8) years and the body mass index of (23.2±2.8) kg/m2. The mixed energy group images and 5 single energy groups of 50, 55, 60, 65 and 70 keV images were reconstructed from the images in the inferior vena cava phase. The subcutaneous fat noise, CT values, signal to noise ratio (SNR) and contrast to noise ratio (CNR) for each segment of the inferior vena cava in 5 sets of single-energy images were measured and evaluated subjectively to determine the best single energy level. The images were reconstructed by combining different weight ASIR-V (20%, 30%, 40%, 50%, 60%, 70% and 80%) algorithms, and images from different weight groups and mixed energy groups were evaluated objectively to determine the best ASIR-V weights which was matched with the best single energy level. All images were scored subjectively by 2 senior radiologists based on image noise, uniformity of vessel filling, sharpness of vessel margins and diagnostic confidence.Results:There were significant differences in subcutaneous fat noise and objective evaluation indexes of each segment of inferior vena cava among the monoenergetic groups (all P<0.05), each objective evaluation index increased with the decrease of energy level, the maximum value was obtained in the 50 keV group. The subjective scores of the 5 groups were consistent by the 2 radiologists(all κ≥0.75). The highest subjective scores were obtained in the 60 keV group, the best single energy level is 60 keV in a comprehensive analysis. The differences in objective evaluation indicators among the 7 groups of best single energy combined with different weights ASIR-V image group and the mixed energy group were all statistically significant (all P<0.01). Image noise decreased with increasing ASIR-V weights for different weight groups, all differences among groups were statistically significant (all P<0.01), and the minimum noise was minimal in 80% weight group. There was no significant change in CT value of each segment of inferior vena cava (all P>0.05). The SNR and CNR of each segment of inferior vena cava increased, all differences among groups were statistically significant (all P<0.01), and the SNR and CNR of 80% weight group was the highest. The subjective scores of the 8 groups were consistent evaluated by the 2 radiologists (all κ≥0.75), and the subjective score of 60% weight group was the highest, 60% was the best ASIR-V weight for matching 60 keV in a comprehensive analysis. Conclusions:The study indicates that the best energy level for optimizing energy spectrum CT single energy imaging of the inferior vena cava is 60 keV, on the basis of which the best weighting for combined ASIR-V is 60%.

Objective:To investigate the predicting value of high sensitivity C-reactive protein (hs-CRP) and albumin (Alb) ratio on prognosis of patients with in-hospital cardiac arrest (IHCA).Methods:A total of 107 patients with IHCA and spontaneous circulation recovery (ROSC) after cardiopulmonary resuscitation (CPR) in the Affiliated Hospital of Xuzhou Medical University during January 1, 2017 and September 30, 2020 were selected as the subjects and divided into the survival group and death group according to the survival condition on day 14 after IHCA. The correlation between ratio of high sensitivity C-reactive protein/albumin (hs-CRP/Alb) and the prognosis of patients was analyzed.Results:No statistical significant differences were found between the survival and death groups in sex, age, medical history, ECG monitoring, recovery ventilation mode, percentage of first monitoring of heart rate and pre-resuscitation Alb (all P > 0.05). However, there were significant differences in the percentage of non-cardiogenic CA and adrenaline dose > 5 mg, time of CPR, concentrations of blood lactic acid, Alb, hs-CRP, and ratio of hs-CRP/Alb (all P < 0.05). Logistic regression analysis showed that percentage of adrenaline dose > 5 mg, concentration of blood lactic acid, time of CPR, and ratio of hs-CRP/Alb were independent risk factors for predicting death. ROC curve analysis showed that hs-CRP/Alb ratio, and concentration of hs-CRP and Alb had predictive value on the death of patients with IHCA; the areas under the curves of hs-CRP/Alb ratio, hs-CRP and Alb concentration were 0.876, 0.864 and 0.745, respectively. The predictive efficiency of hs-CRP/Alb ratio was better than that of hs-CRP concentration or Alb concentration. Conclusions:hs-CRP/Alb ratio has predictive value for the prognosis of patients with IHCA and the predictive value is superior to that of hs-CRP and Alb concentration.

By analyzing the physiological structure and motion characteristics of human ankle joint, a four degree of freedom generalized spherical parallel mechanism is proposed to meet the needs of ankle rehabilitation. Using the spiral theory to analyze the motion characteristics of the mechanism and based on the method of describing the position with spherical coordinates and the posture with Euler Angle, the inverse solution of the closed vector equation of mechanism position is established. The workspace of mechanism is analyzed according to the constraint conditions of inverse solution. The workspace of the moving spherical center of the mechanism is used to match the movement space of the tibiotalar joint, and the workspace of the dynamic platform is used to match the movement space of subtalar joint. Genetic algorithm is used to optimize the key scale parameters of the mechanism. The results show that the workspace of the generalized spherical parallel mechanism can satisfy the actual movement space of human ankle joint rehabilitation. The results of this paper can provide theoretical basis and experimental reference for the design of ankle joint rehabilitation robot with high matching degree.
Ankle Joint ; Biomechanical Phenomena ; Humans ; Movement ; Range of Motion, Articular

Parthenogenetic embryos, created by activation and diploidization of oocytes, arrest at mid-gestation for defective paternal imprints, which impair placental development. Also, viable offspring has not been obtained without genetic manipulation from parthenogenetic embryonic stem cells (pESCs) derived from parthenogenetic embryos, presumably attributable to their aberrant imprinting. We show that an unlimited number of oocytes can be derived from pESCs and produce healthy offspring. Moreover, normal expression of imprinted genes is found in the germ cells and the mice. pESCs exhibited imprinting consistent with exclusively maternal lineage, and higher X-chromosome activation compared to female ESCs derived from the same mouse genetic background. pESCs differentiated into primordial germ cell-like cells (PGCLCs) and formed oocytes following in vivo transplantation into kidney capsule that produced fertile pups and reconstituted ovarian endocrine function. The transcriptome and methylation of imprinted and X-linked genes in pESC-PGCLCs closely resembled those of in vivo produced PGCs, consistent with efficient reprogramming of methylation and genomic imprinting. These results demonstrate that amplification of germ cells through parthenogenesis faithfully maintains maternal imprinting, offering a promising route for deriving functional oocytes and having potential in rebuilding ovarian endocrine function.
Animals ; Female ; Mice ; Mice, Transgenic ; Mouse Embryonic Stem Cells/metabolism* ; Oocytes/metabolism* ; Parthenogenesis

In the original publication the labelling of Figure 1D, Y-axis is incorrectly published. The correct labeling should be read as Fragilis+/SSEA1+ and the correct figure is provided in this correction.

In the original publication the labelling on Fig. 2A and B were incorrectly published as E7.5. The correct labelling of Fig. 2A and B should be read as E17.5 which is provided in this correction.