OBJECTIVE: To explore the corrective strategies and effectiveness of osteotomy surgery for severe lower limb deformities in hypophosphatemic rickets. METHODS: A retrospective analysis was conducted on 29 patients with severe lower limb deformities of hypophosphatemic rickets who underwent surgical treatment between February 2012 and August 2024. There were 9 males and 20 females. The age ranged from 13 to 53 years, with an average of 24.6 years. All patients were deformities of both lower limbs, presenting as 24 cases of O-shaped legs, 2 cases of wind-blown deformities, and 3 cases of X-shaped legs. Based on the full-length films of both lower limbs in the standing position before operation, the osteotomy planes of the femur, tibia, and fibula were designed. Among them, if both the same-sided thigh and leg were deformed, staged surgeries of both lower limbs were selected. If only the thigh or leg were deformed, simultaneous surgeries of both lower limbs were selected. The femur deformity was corrected immediately after osteotomy at the deformed plane; the osteotomy fragment was temporarily controlled with an external fixator, which was removed after perform internal fixation with a steel plate. After fibular osteotomy, the Ilizarov frame or Taylor frame was installed on the tibia and fibula. The threaded rods were removed and then tibial osteotomy was performed on the deformed plane. Patients using the Taylor frame did not undergo deformity correction during operation. The external fixators were adjusted starting 7 days after operation to correct the varus, valgus, and rotational deformities of the lower limb. Patients using the Ilizarov frame corrected the rotational deformity of the tibia during operation. The external fixator was adjusted starting 7 days after operation to correct the varus and valgus deformities of the lower limb. During the treatment period, the patient could walk with partial weight-bearing on the operated limb with crutches. The external fixator was removed after the bone healed. Before operation and at last follow-up, the medial proximal tibial angle (MPTA), lateral distal tibial angle (LDTA), posterior proximal tibial angle (PPTA), anterior distal tibial angle (ADTA), anatomic lateral distal femoral angle (aLDFA), posterior distal femoral angle (PDFA), and mechanical axis deviation (MAD), lower limb rotation, limb length discrepancy (LLD) were measured. The self-made scoring criteria were adopted to evaluate the degree of lower limb deformity of the patients. RESULTS: All operations were successfully completed, and no complications such as nerve or vascular injury occurred. The adjustment time of the external fixator of the lower limb after operation was 28-46 days, with an average of 37.4 days. The wearing time of the external fixator ranged from 134 to 398 days, with an average of 181.5 days. Mild pin tract infections occurred in 2 limbs. The osteofascial compartment syndrome occurred in 1 limb after operation. No complications related to orthopedic adjustment of the external fixator occurred in other patients. All patients were followed up 6-56 months, with an average of 28.2 months. At last follow-up, full-length films of both lower limbs in the standing position showed that the coronal mechanical axes of the lower limbs of all patients returned to the normal. At last follow-up, MPTA, LDTA, PPTA, aLDFA, PDFA, MAD, lower limb rotation, LLD, and the score of lower limb deformity significantly improved when compared with those before operation ( P<0.05). There was no significant difference in ADTA between pre- and post-operation ( P>0.05). The degree of lower limb deformity were rated as moderate in 2 cases and poor in 27 cases before operation and as excellent in 7 cases, good in 18 cases, and moderate in 4 cases at last follow-up, with an excellent and good rate of 86.2%. CONCLUSION For severe lower limb deformities in hypophosphatemic rickets, immediate correction of deformities with femoral osteotomy and internal plate fixation, as well as gradually correction of deformities with tibiofibular osteotomy and circular external fixation (Ilizarov frame or Taylor frame), have satisfactory therapeutic effects.
Humans ; Male ; Osteotomy/instrumentation* ; Female ; Adult ; Retrospective Studies ; Tibia/abnormalities* ; Adolescent ; Femur/abnormalities* ; Middle Aged ; Fibula/surgery* ; Rickets, Hypophosphatemic/complications* ; Young Adult ; Treatment Outcome ; External Fixators ; Bone Plates ; Lower Extremity Deformities, Congenital/etiology*

Objective This study aims to explore the application effect of a multidisciplinary teaching model(MDT)combined with problem-based learning(PBL)and case-based learning(CBL)in the standardized training of radiation oncology residents.The study aims to highlight its innovative teaching reform characteristics and enhance students'comprehensive quali-ties.Methods This study included 80 residents who underwent radiation oncology training in our hospital from October 2018 to October 2021.The participants were divided into a research group(n=40)that received MDT combined with PBL+CBL multi-track teaching and a control group(n=40)that received traditional lecture-based teaching(LBL).General information of the residents,including age,gender,and entrance exam scores,was collected.The total scores of the two groups in theoretical knowledge,case analysis,and skill operation after training were statistically analyzed.The comprehensive qualities of the resi-dents were evaluated in terms of self-learning ability,comprehension ability,thinking ability,practical ability,and learning in-terest.The scoring system ranged from 0 to 10,with higher scores indicating stronger comprehensive qualities.A questionnaire was used to assess the satisfaction of the residents with the teaching courses,categorized as very satisfied,satisfied,or dissatis-fied,and the overall satisfaction was calculated.Results The research group had significantly higher scores in theoretical knowl-edge,case analysis,skill operation,and total scores compared to the control group(P＜0.05).The research group also had higher scores in self-learning ability,comprehension ability,thinking ability,practical ability,and learning interest(P＜0.05).The overall satisfaction evaluation of the research group was significantly higher(P＜0.05).Conclusion In the teaching of ra-diation oncology,the MDT combined with PBL+CBL model,which focuses on the cultivation of practical and applied talents,can greatly enhance the enthusiasm and interest of residents in training,significantly improve teaching outcomes,and strengthen the comprehensive qualities of clinical physicians.

Objective:To develop a preoperative differentiation model for colorectal mucinous adenocarcinoma and non-mucinous adenocarcinoma using a combination of contrast-enhanced CT radiomics and deep learning methods.Methods:This is a retrospective cohort study. Clinical data of colorectal cancer patients confirmed by postoperative pathological examination were retrospectively collected from January 2016 to December 2023 at Shanghai General Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (Center 1, n=220) and the First Affiliated Hospital of Bengbu Medical University (Center 2, n=51). Among them, there were 108 patients diagnosed with mucinous adenocarcinoma, including 55 males and 53 females, with an age of (68.4±12.2) years (range: 38 to 96 years); and 163 patients diagnosed with non-mucinous adenocarcinoma, including 96 males and 67 females, with an age of (67.9±11.0) years (range: 43 to 94 years). The cases from Center 1 were divided into a training set ( n=156) and an internal validation set ( n=64) using stratified random sampling in a 7∶3 ratio, and the cases from Center 2 were used as an independent external validation set ( n=51). Three-dimensional tumor volume of interest was manually segmented on venous-phase contrast-enhanced CT images. Radiomics features were extracted using PyRadiomics, and deep learning features were extracted using the ResNet-18 network. The two sets of features were then combined to form a joint feature set. The consistency of manual segmentation was assessed using the intraclass correlation coefficient. Feature dimensionality reduction was performed using the Mann-Whitney U test and the least absolute shrinkage and selection operator regression. Six machine learning algorithms were used to construct models based on radiomics features, deep learning features, and combined features, including support vector machine, logistic regression, random forest, extreme gradient boosting, k-nearest neighbors, and decision tree. The discriminative performance of each model was evaluated using receiver operating characteristic curves, the area under the curve (AUC), DeLong test, and decision curve analysis. Results:After feature selection, 22 features with the most discriminative value were finally retained, among which 12 were traditional radiomics features and 10 were deep learning features. In the internal validation set, the Random Forest algorithm based on the combined features model achieved the best performance (AUC=0.938, 95% CI: 0.875 to 0.984), which was superior to the single-modality radiomics feature model (AUC=0.817, 95% CI: 0.702 to 0.913, P=0.048) and the deep learning feature model (AUC=0.832, 95% CI: 0.727 to 0.926, P=0.087); in the independent external validation set, the Random Forest algorithm with the combined features model maintained the highest discriminative performance (AUC=0.891, 95% CI: 0.791 to 0.969), which was superior to the single-modality radiomics feature model (AUC=0.770, 95% CI: 0.636 to 0.890, P=0.045) and the deep learning feature model (AUC=0.799, 95% CI: 0.652 to 0.911, P=0.169). Conclusion:The combined model based on radiomics and deep learning features from venous-phase enhanced CT demonstrates good performance in the preoperative differentiation of colorectal mucinous from non-mucinous adenocarcinoma.

Osteoporosis is a common senile bone metabolism disease， clinically characterized by decreased bone mass， destruction of bone microstructure， increased bone fragility， and easy fracture. It tends to occur in the elderly and postmenopausal women， seriously threatening the quality of life and physical and mental health of the elderly. At present， the treatment of osteoporosis is mainly based on oral western medicines， such as calcium， Vitamin D， and bisphosphonates. Still， there are drawbacks such as a long medication cycle and many adverse reactions. In recent years， due to the advantages of multi-component， multi-pathway， and multi-target， some traditional Chinese medicines and effective ingredients can regulate the osteogenic and osteoclastic differentiation process in both directions and are widely used in the prevention and treatment of osteoporosis. Hippophae rhamnoides is a commonly used herbal medicine， and its fruits are rich in flavonoids， polyphenols， fatty acids， vitamins， and trace elements， which have been proven to have a good anti-osteoporosis effect. Isorhamnetin is the main effective ingredient of Hippophae rhamnoides fruits， which has many pharmacological effects such as anti-inflammation， anti-oxidative stress， anti-aging， and anti-tumor. Studies have shown that isorhamnetin can participate in the regulation of bone metabolism and has a good anti-osteoporosis effect. However， the pharmacological effects and related mechanisms of isorhamnetin against osteoporosis have not been systematically summarized. Therefore， this paper reviewed the pharmacological effects and related mechanisms of isorhamnetin against osteoporosis by referring to relevant literature to provide more basis for the development and application of isorhamnetin.

Objective To investigate the effect of ligustrazine on spinal cord repair from the perspective of macrophage autophagy and its molecular mechanism in a rat model.Methods A rat model of spinal cord injury was established using Allen's method.Successful modeling was indicated by hindlimb spasm,tail twisting,and Basso,Beattie,and Bresnahan(BBB)score of 0.The rats were divided into 4 groups:sham-operation group,model group,low-dose ligustrazine group,and high-dose ligustrazine group,with 10 rats in each group.The low-dose and high-dose ligustrazine groups were administered ligustrazine(150 mg/kg and 200 mg/kg,respectively)via intraperitoneal injection,while the normal and model groups received an equal volume of normal saline once daily for 28 days.At different time points after surgery,the hindlimb motor function of the rats was assessed using the BBB scale.Hematoxylin-eosin(HE)and Nissl staining were used to observe the histopathological changes in the spinal cord tissue and the morphology of neurons.Enzyme-linked immunosorbent assay(ELISA)was employed to detect the expression levels of superoxide dismutase(SOD)and malondialdehyde(MDA)in the spinal cord tissue.TUNEL staining was used to evaluate the apoptosis status of spinal cord neurons.Protein levels of LC3 I,LC3 Ⅱ,Bax,and Bcl-2 in the spinal cord tissue were detected by Western Blot.Electron microscopy was used to observe the formation of autophagosomes in spinal cord macrophages,and immunofluorescence was used to detect the protein expression of LC3 Ⅱ in spinal cord macrophages.Results Compared with the sham-operation group,the model group exhibited impaired hindlimb function and spinal cord tissue morphology(P<0.05),along with decreased levels of SOD,apoptosis,LC3 Ⅱ/Ⅰ,Bcl-2 protein expression,autophagosome number in macrophages,and LC3 Ⅱ protein expression,as well as increased levels of MDA,Bax,and Bax/Bcl-2 protein expression(P<0.05).Compared with the model group,both the low-dose and high-dose ligustrazine groups showed improved hindlimb function and spinal cord tissue morphology(P<0.05),with increased levels of SOD,apoptosis,LC3 Ⅱ/Ⅰ,Bcl-2 protein expression,autophagosome number in macrophages,and LC3 Ⅱ protein expression,as well as decreased levels of MDA,Bax,and Bax/Bcl-2 protein expression(P<0.05).The intervention effect of ligustrazine was dose-dependent.Conclusion Ligustrazine can effectively repair spinal cord injury in rats,and its molecular mechanism may be related to the activation of autophagy in spinal cord macrophages and the inhibition of neuronal apoptosis.

Improving the nitrogen use efficiency (NUE) of Brassica napus is of significant importance for achieving the national goal of zero growth in chemical fertilizer application and ensuring the green development of the rapeseed industry. This study aims to explore the effects of the nitrate transporter gene BnaNRT1.5s on the nitrogen transport and NUE of B. napus, providing excellent genetic resources for the development of nitrogen-efficient B. napus varieties. The spatiotemporal expression of BnaA05.NRT1.5 as a key nitrogen responsive gene was profiled by qRT-PCR at different growth stages and for different tissue samples of B. napus 'Westar'. Subcellular localization was employed to examine its expression pattern in the cells. Additionally, CRISPR/Cas9 was used to create BnaNRT1.5s knockout lines, which were subjected to hydroponic experiments under high nitrogen (12.0 mmol/L) and low nitrogen (0.3 mmol/L) conditions. After the seedlings were cultivated for 21 days, root and shoot samples were collected for weighing, nitrogen content determination, xylem sap nitrate content assessment, and calculation of total nitrogen and NUE. The B. napus nitrate transporter BnaA05.NRT1.5 was localized to the cell membrane. During the seedling and early bolting stages, BnaA05.NRT1.5 was predominantly expressed in roots, while it was highly expressed in old leaves and mature silique skin during the reproductive stage. Compared with the wild type, the mutant BnaNRT1.5s showed significant increases in the dry weight and total nitrogen of seedlings under both high and low nitrogen conditions. Under low nitrogen conditions, NUE in the roots of BnaNRT1.5s significantly improved. Notably, under both high and low nitrogen conditions, the nitrate content in the shoots of BnaNRT1.5s decreased significantly, while that in the roots increased significantly, resulting in a significantly decreased shoot-to-root nitrate content ratio. BnaNRT1.5s is involved in regulating the transport of nitrate from the roots to the shoots, and its mutation enhances nitrogen absorption and utilization in B. napus seedlings, promoting seedling growth. This study not only provides references for understanding the physiological and molecular mechanisms by which BnaNRT1.5s regulates NUE but also offers valuable genetic resources for improving NUE in B. napus.
Brassica napus/genetics* ; Anion Transport Proteins/metabolism* ; Nitrogen/metabolism* ; Nitrate Transporters ; Plant Proteins/metabolism* ; Nitrates/metabolism* ; Gene Expression Regulation, Plant ; Biological Transport

Objective To investigate the association between the TyG index,its modified variants,and the risk of developing colorectal cancer(CRC).Methods This study included a total of 93,177 participants from the 2006 Kailuan Group health examination cohort.Participants were categorized into four quartiles(Q1-Q4)according to their TyG and modified TyG indices.Follow-up began at the baseline examination,with incident CRC as the primary outcome.Participants were censored at the time of CRC diagnosis,death,or the end of the study,whichever occurred first.The dose-response relationship between TyG and its modified indices and the risk of CRC was evalu-ated using restricted cubic splines(RCS)in conjunction with Cox proportional hazards regression models,yielding hazard ratios(HRs)and 95%confidence intervals(CIs).To compare the strength of associations between TyG and its modified versions(TyG-BMI,TyG-WC,TyG-WHR,TyG-WHtR,TyG-WWI)and CRC risk,HRs for CRC per one standard deviation increase in each index were calculated and compared.Results Both the TyG index and its modified variants demonstrated a significant dose-response relationship with the risk of CRC incidence.Specifically,for the TyG index,each 1-standard deviation(SD)increase was associated with a 1.17-fold(95%CI:1.09～1.27)higher risk of CRC.Compared with the first quartile(Q1),the third quartile(Q3)and fourth quartile(Q4)exhibited a 1.25-fold(95%CI:1.01～1.55)and 1.26-fold(95%CI:1.01～1.57)increased risk,respectively.For TyG-BMI,each 1-SD increase was linked to a 1.20-fold(95%CI:1.07～1.35)elevated CRC risk.Compared with Q1,Q3 and Q4 showed a 1.32-fold(95%CI:1.06～1.64)and 1.51-fold(95%CI:1.21～1.88)increase,respectively.Regarding TyG-WC,each 1-SD increment was associated with a 1.22-fold(95%CI:1.13～1.32)higher CRC risk,with Q3 and Q4 showing a 1.35-fold(95%CI:1.08～1.70)and 1.56-fold(95%CI:1.24～1.96)increased risk compared to Q1.For TyG-WHtR,each 1-SD increase was associated with a 1.24-fold(95%CI:1.08-1.42)higher CRC risk.Compared with Q1,Q2,Q3,and Q4 demonstrated a 1.31-fold(95%CI:1.03～1.66),1.55-fold(95%CI:1.23～1.95),and 1.60-fold(95%CI:1.27～2.02)increase,respectively.In the case of TyG-WHR,each 1-SD increase was associated with a 1.19-fold(95%CI:1.10～1.29)higher CRC risk,with Q4 showing a 1.42-fold(95%CI:1.14～1.77)increased risk compared to Q1.Finally,for TyG-WWI,each 1-SD increase was associated with a 1.22-fold(95%CI:1.13～1.32)elevated CRC risk,with both Q3 and Q4 showing a 1.58-fold increase(Q3:95%CI:1.26～1.98;Q4:95%CI:1.25～1.99).Stratified analyses by sex and age consistently revealed significant associations between the TyG index and its modified variants and CRC risk.Furthermore,these indices were independently associated with the incidence of both colon cancer and rectal cancer.Conclusions(1)Elevated levels of the TyG index and its modified variants are independent risk factors for CRC.(2)Both the TyG index and its modified forms demonstrate a significant dose-response association with the incidence of CRC.(3)Among the modified TyG indices,TyG-WWI,TyG-WHtR,TyG-BMI,TyG-WC,and TyG-WHR showed stronger correlations with CRC risk compared to the original TyG index.

Objective:In carbon ion treatment planning of water phantom, establish a conversion factor calculation system and conversion factor curves for organs at risk (OAR) for microdosimetric kinetic models (MKM) and local effect models (LEM), and validate them in clinical patient planning.Methods:Using a uniform spherical water phantom as the research object, relative biological effectiveness-weighted doses (RWD) for the LEM were re-calculated based on the physical dose of RayStation-MKM. The median dose within the planning target volume (PTV) of LEM and MKM was regarded as the conversion factor. The impacts of single-fraction target prescription dose, spread-out Bragg peak (SOBP) width and depth, shape, and irradiation mode on the conversion factor were assessed, and a conversion factor calculation system was established. Additionally, the accuracy of the conversion factor calculation system was validated using both water phantoms and clinical patient cases. The conversion factor curves for OAR were computed based on clinical patient treatment plans.Results:The primary influencing factors for the conversion factors were the single-fraction prescription dose, target SOBP width and depth. The conversion factors were increased with the increase of SOBP width and target depth, whereas decreased with the increase of the single-fraction prescription dose. Under single-field irradiation, a conversion factor calculation system was established based on above 3 parameters. For the plans of 9 patients, the average difference between the calculated results and the conversion factor calculation system was 0.340% ± 0.203%, and the average difference in the conversion curves for OAR was 2.650% ± 2.399%.Conclusion:A dose conversion factor calculation system and conversion factor curves for OAR for carbon ion radiotherapy are established for MKM and LEM, and their accuracy meets the requirements for use in clinical patient treatment plans.

Objective:To observe the efficacy and safety of micro-focusing ultrasound (MFU) combined with dye pulsed light (DPL) in the treatment of facial skin aging.Methods:A retrospective study was conducted in 133 patients treated for facial skin aging at Zhiyan Medical Beauty Clinic, the Fifth Affiliated Hospital of Guangzhou Medical University, and Sun Yat-sen Memorial Hospital of Sun Yat-sen University from May to September 2023. There were 46 males and 87 females, aged 24-45 (34.5±3.7) years. Patients were divided into two groups based on the treatment they received: combined treatment group: 55 cases, treated with MFU combined with DPL; control group: 77 cases, treated with MFU only. After the completion of treatment in all patients, three clinical physicians evaluated the pre-treatment and immediate post-treatment photos for efficacy, including improvement, deterioration, and ineffectiveness. The pain degree scores and skin reaction scores were compared between the two groups. The occurrence of adverse reactions was recorded.Results:After treatment, the improvement rate of all patients was 100 % (133/133). The pain score of the combined treatment group was 0.10 (0.05, 0.20) points, and that of the control group was 0.75 (0.60, 0.90) points. The difference was statistically significant between the two groups ( Z=-6.66, P<0.001). The skin reaction score of the combined treatment group was 0.40 (0.20, 0.60) points, and that of the control group was 1.20 (0.90, 1.50) points. The difference was statistically significant between the two groups ( Z=-5.18, P<0.001). There were no treatment site wounds and other serious adverse reactions during the treatment of all patients. Conclusion:MFU combined with DPL is effective in the treatment of facial skin aging without serious adverse reactions.

A 57-year-old female patient with small cell lung cancer was treated with serplulimab (100 mg by intravenous infusion on the first day, 21 days as a cycle). After the 10th cycle of treatment, the patient suddenly presented drowsiness, shortness of breath, dry mouth, nausea, vomiting, fatigue and other symptoms. Laboratory tests showed fasting blood glucose 38.9 mmol/L, glycosylated hemoglobin 7.9%, serum C peptide 0.2 μg/L, pH value 7.05, anion gap 31 mmol/L, anti-islet cell antibody 36 kU/L, anti-glutamic acid decarboxylase antibody 131 kU/L, urine ketone body (+++). The patient was diagnosed with fulminant type 1 diabetic ketoacidosis, which was considered to be related to serplulimab. The drug was stopped, and insulin, rehydration, correction of acid-base imbalance, and other treatments were given. After 3 days, the patient′s consciousness returned to normal. After 12 days, her breathing was stable, dry mouth, nausea, vomiting and other symptoms were relieved. Laboratory tests showed random blood glucose 13.6 mmol/L, pH value 7.44, anion gap 6 mmol/L, and urine ketone body negative. After 26 days, her random blood glucose was controlled at 10.0-12.0 mmol/L.