BACKGROUND:Tissue engineering is considered an ideal treatment for growth plate regeneration.However,most of the current research on regenerative tissue engineering is the traditional scaffold-based strategy.As the limitations of traditional scaffolds are gradually revealed,the research direction is gradually diversifying. OBJECTIVE:To summarize the application of scaffold-based and scaffold-free strategies in the treatment of growth plate cartilage regeneration and their respective advantages and disadvantages. METHODS:The relevant articles were searched from PubMed,Wiley,and Elsevier.The search terms were"growth plate injury,regeneration,tissue engineering,scaffold,scaffold-free,biomimetic,cartilage"in English.The time was limited from 1990 to 2023.Finally,104 articles were included for review. RESULTS AND CONCLUSION:The biomimetic strategy is to reduce the cell composition,biological signals and unique mechanical properties of each region to the greatest extent by simulating the unique organizational structure of the growth plate,so as to build a biomimetic microenvironment that can promote tissue regeneration.Therefore,the design of a biomimetic scaffold is to simulate the original growth plate as far as possible in terms of composition,structure and mechanical properties.Although some results have been achieved,there is still the problem of the unstable regeneration effect.The scaffold-free strategy believes that the limitations of scaffolds will have adverse effects on regenerative therapy.Therefore,the design of scaffold-free constructs relies as much as possible on the ability of cells to generate and maintain extracellular matrix without interfering with cell-cell signals or introducing exogenous substances.However,there are some problems,such as poor stability,low mechanical strength and greater difficulty in operation.Biomimetic strategy and scaffold-free strategy have different emphases,advantages and disadvantages,but they both have positive effects on growth plate cartilage regeneration.Therefore,subsequent studies,whether adopting a biomimetic strategy or a scaffold-free strategy,will focus on the continuous optimization of existing technologies in order to achieve effective growth plate cartilage regeneration therapy.

Objective:To investigate the auditory and speech abilities of children with congenital auditory neuropathy (AN) after cochlear implant (CI), and to analyze the role of genetic testing in predicting the postoperative outcomes of CI in AN patients.Methods:Fourteen children diagnosed with AN by audiological battery test and underwent CI surgery in Xijing Hospital of the Air Force Medical University from 2002 to 2021 were included in this study (9 males and 5 females), with an implantation age of (3.1±1.7) years (mean±standard deviation, the same as follows). The preoperative audiological results and deafness gene results were analyzed. Another 52 children with ordinary sensorineural hearing loss (SNHL) were selected as the control group (30 males and 22 females), with an implantation age of (2.2±0.9) years. The demographic factors such as age and gender were matched with those of the AN group. The modified Category Auditory Performance (CAP-Ⅱ) and Speech Intelligence Rate (SIR) were used to evaluate the development of postoperative auditory and speech abilities in two groups. The Mandarin Speech Test System was used to test the speech recognition rate of monosyllabic and disyllabic words and sentences. Matlab 2022 software was used to analyze the data.Results:The results of gene in 14 children with AN showed that 6 cases had OTOF gene mutations, 2 cases (siblings) were confirmed to have TNN gene mutations through whole exome sequencing, and the remaining 6 cases were not find any clear pathogenic gene mutations. All subjects underwent CI surgery with electrodes implanted into the cochlea smoothly, and there were no postoperative complications. After surgery, all AN children had improved auditory and speech abilities, but only 64% (9/14) of AN children with CI had auditory ability scores comparable to the control group of SNHL children (including 2 children with TNN gene mutations), and 36% (5/14) of AN children had lower scores than the control group of SNHL children.The average speech recognition rate of two children with TNN gene mutations was 86.5%, and of two children with OTOF gene mutations was 83.2%. Conclusions:AN children achieved varying degrees of auditory and speech abilities after CI, but the postoperative effects varied greatly. Some children achieved similar results as ordinary SNHL children, but there were still some children whose effects were worse than those of ordinary SNHL children. The postoperative efficacy of CI in two children with AN caused by TNN pathogenic genes were comparable to that of ordinary SNHL in children. Genetic testing had certain reference value for predicting the postoperative effect of CI in AN children.

Objective To explore the value of computer-aided measurement of the mass-based consolidation-to-tumor ratio(CTRmass)in predicting preoperative clinical stage IA lung adenocarcinoma invasion.Methods A total of 56 patients with stage IA lung adenocarcinoma were retrospectively selected from Linfen Central Hospital and the National Lung Screening Trial(NLST)database(project number NLST-1053),and all of them were confirmed by pathology.Computer-aided software was used to automatically cal-culate parameters such as the volume-based consolidation-to-tumor ratio(CTRvol),CTRmass,average CT value,and maximum axial diameter,and its correlation with pathological results was analyzed.Results When the CTRmass≥30.95％,it indicated that lung nodules were more likely to be invasive adenocarcinoma(IAC).Conclusion CTRmass,based on computer-aided software measure-ment,can be used as one of the important indicators to evaluate the preoperative invasion of clinical stage IA lung adenocarcinoma,guiding the selection of surgical methods,and obtaining better curative effects.

Objective To develop and evaluate the equivalence of the Mandarin test material for tracking of noise tolerance(TNT)test.Methods Six different speech materials were developed(themes including daily life,entertainment,family,festivals,outdoors,and school).Four-minute TNT tests were measured in 21 normal hear-ing subjects using six different test materials.For each session,the tolerable noise level(TNL)and TNT scores were acquired and calculated for 3 time windows(31～240 s,31～120 s,151～240 s).Results Statistic analysis showed significant differences in the TNL(F=43.611,P＜0.05)among the normal hearing listeners.There were statistically significant differences in standardize z-scored TNT scores of the six different materials in the three time windows(P＜0.05).Post-hoc comparisons revealed that all significant differences involved the family and daily life themes.Conclusion Entertainment,festival,outdoors and school themed test materials can serve as the materials of Mandarin tracking of noise tolerance test and can be appied in research and clinical testing.

Objective To evaluate the Mandarin tracking of noise tolerance(TNT)test material and compare the differences between the average tolerable noise level(aTNL)value obtained from assessment and the program-estimated tolerable noise level(eTNL).Methods A total of 25 subjects with normal hearing and aural communica-tional ability were selected to undergo two of the mandarin TNT tests successively(respectively test 1,C1;test 2,C2),and 13 of them completed the third test(C3)under the same test condition as test 2 at least 1 week later.The stimulus for the three test conditions was presented with"speech 0°,continuous noise 180°".Results The aTNL of 25 participants for C1 and C2 was 83.42±3.09 dB SPL and 83.50±3.18 dB SPL,respectively.The eTNL of 25 participants for C1 and C2 were 84.08±3.53 dB SPL and 83.95±3.85 dB SPL,respectively.The aTNL and eT-NL for 13 subjects who participated in C3 was 83.16±2.13 dB SPL and 83.18±2.64 dB SPL,respectively.The intra-session(C1 vs C2)and inter-session(C2 vs C3)test-retest reliability were 2.36 dB and 2.75 dB,respectively.Pearson correlation analysis showed that intra-session(r=0.837,P＜0.001)and inter-session(r=0.867,P＜0.001)test-retest reliability was good.There was no statistical difference between aTNL and eTNL in the other TNT tests(P＞0.05 for both)except that aTNL and eTNL were statistically different in C1(P＜0.01),and more than 90％of the subjects could obtain eTNL within 1 minute.Conclusion The test-retest reliability of Mandarin tracking of noise tolerance test is good,with advantages of high reliability and efficiency.

Objective To observe the imaging manifestations of alveolar soft part sarcoma(ASPS).Methods CT,MRI and PET/CT data of 21 patients with pathologically confirmed ASPS were retrospective reviewed,and the imaging findings were analyzed.Results All 21 cases of ASPS presented as single primary lesion,mostly located in lower limbs(9/21,42.86％)and pelvis(5/21,23.81％),with the average maximum diameter of(72.10±42.23)mm.On non-contrast CT imaging,primary lesions appeared as iso-low inhomogeneous density masses(9/9,100％),which obviously heterogeneously enhanced in 6 cases(6/6,100％).Enlarged blood vessel shadows were noticed in 3 cases(3/6,50.00％),especially upper/lower pole of the tumors.The primary lesions presented as iso-slight high signals on non-contrast T1WI,mixed high signals on both T2WI and diffusion weighted imaging(DWI),as well as low signals on apparent diffusion coefficient(ADC)images(18/18,100％),with necrosis and cystic areas within the tumor and empty blood vessel shadows in 15 cases(15/18,83.33％).Heterogeneous enhancement of primary lesions were detected in 9 cases(9/9,100％),while necrosis and cystic areas did not enhance,but empty blood vessel shadows obviously enhanced.PET/CT demonstrated increased FDG uptake in 4 cases(4/4,100％),with the maximum standard uptake value ranged from 4.2 to 7.9.Among 21 cases,distant metastases developed in 19(19/21,90.48％),most frequently to lungs(17/21,80.95％),bones(11/21,52.38％)and lymph nodes(6/21,28.57％).Conclusion ASPS usually occurred in lower limbs and pelvis,which was prone to distant metastasis.The imaging manifestations of primary ASPS mostly presented as large tumors with uneven density,and enlarged blood vessel above and below the tumor were the relative characteristic performances.

Objective:To establish of a newmethod:for the rapid detection of H5N1-Avian Influenza virus by combining reverse transcription (RT), multiple cross displacement amplification (MCDA) and nanoparticle-based lateral flow biosensor (LFB).Methods:MCDA primers were designed based on gene sequences specific to Hemagglutinin (HA) and Neuraminidase (NA) in H5N1 avian influenza virus. The target genes HA and NA were amplified through reverse transcription and MCDA in one reaction system. Results were displayed by LFB. The assay was named as H5N1-mRT-MCDA-LFB. The reaction conditions of the H5N1-RT-MCDA-LFB method were optimized, and the sensitivity and specificity were also assessed.Results:The H5N1-RT-MCDA-LFB assay could achieve good amplification effect at a constant temperature of 65 ℃ for 40 minutes. The method had a lower limit of detection of 100 fg per reaction with 100-fold higher sensitivity than that of the RT-qPCR (lower limit of detection 10 pg per reaction). The assay was negative in detecting 28 common viruses, mycoplasmas, chlamydias, bacterias and funguses, except for H5N1. In addition, the H5N1-RT-MCDA-LFB method showed better validation in simulated clinical samples with a lower limit of detection at 1×10 2 copies/ml. Conclusion:The H5N1-RT-MCDA-LFB assay is a valuable molecular diagnostic technique for detecting H5N1 avian influenza virus due to its simplicity, rapidity, sensitivity and specificity.

Background/Aims: The occurrence and development of circular RNAs in gastric cancer (GC) has attracted increasing attention. This study focused on investigating the biological role and molecular mechanism of circ_0043947 in GC. Methods: The expression levels of circ_0043947, miR-384 and CAMP response element binding protein (CREB1) were determined by quantitative real-time polymerase chain reaction or Western blotting. Cell proliferation, migration, and invasion, the cell cycle and apoptosis were determined using a cell counting kit-8 assay, 5-ethynyl-2'-deoxyuridine assay, colony formation assay, wound healing assay, transwell assay, and flow cytometry assay. The interaction between miR-384 and circ_0043947 or CREB1 was verified by dual-luciferase reporter assay and RNA pull-down assay. The in vivo assay was conducted using a xenograft mouse model. Results: Circ_0043947 and CREB1 expression levels were significantly upregulated, whereas miR-384 expression levels were downregulated in GC tissues and cells. Functionally, knockdown of circ_0043947 inhibited cell proliferation, migration and invasion and induced G0/G1 phase arrest and apoptosis in vitro. Circ_0043947 could upregulate CREB1 expression by directly sponging miR-384. Rescue experiments showed that a miR-384 inhibitor significantly reversed the inhibitory effect of si-circ_0043947 on GC progression, and CREB1 overexpression significantly reversed the inhibitory effect of miR-384 mimics on the progression of GC cells. Furthermore, silencing of circ_0043947 inhibited tumor growth in vivo. Conclusions Circ_0043947 acted as an oncogenic factor in GC to mediate GC cell proliferation, migration, and invasion, the cell cycle and apoptosis by regulating the miR-384/CREB1 axis.Circ_0043947 may be a potential target for GC diagnosis and therapy.

Background/Aims: The occurrence and development of circular RNAs in gastric cancer (GC) has attracted increasing attention. This study focused on investigating the biological role and molecular mechanism of circ_0043947 in GC. Methods: The expression levels of circ_0043947, miR-384 and CAMP response element binding protein (CREB1) were determined by quantitative real-time polymerase chain reaction or Western blotting. Cell proliferation, migration, and invasion, the cell cycle and apoptosis were determined using a cell counting kit-8 assay, 5-ethynyl-2'-deoxyuridine assay, colony formation assay, wound healing assay, transwell assay, and flow cytometry assay. The interaction between miR-384 and circ_0043947 or CREB1 was verified by dual-luciferase reporter assay and RNA pull-down assay. The in vivo assay was conducted using a xenograft mouse model. Results: Circ_0043947 and CREB1 expression levels were significantly upregulated, whereas miR-384 expression levels were downregulated in GC tissues and cells. Functionally, knockdown of circ_0043947 inhibited cell proliferation, migration and invasion and induced G0/G1 phase arrest and apoptosis in vitro. Circ_0043947 could upregulate CREB1 expression by directly sponging miR-384. Rescue experiments showed that a miR-384 inhibitor significantly reversed the inhibitory effect of si-circ_0043947 on GC progression, and CREB1 overexpression significantly reversed the inhibitory effect of miR-384 mimics on the progression of GC cells. Furthermore, silencing of circ_0043947 inhibited tumor growth in vivo. Conclusions Circ_0043947 acted as an oncogenic factor in GC to mediate GC cell proliferation, migration, and invasion, the cell cycle and apoptosis by regulating the miR-384/CREB1 axis.Circ_0043947 may be a potential target for GC diagnosis and therapy.

Background/Aims: The occurrence and development of circular RNAs in gastric cancer (GC) has attracted increasing attention. This study focused on investigating the biological role and molecular mechanism of circ_0043947 in GC. Methods: The expression levels of circ_0043947, miR-384 and CAMP response element binding protein (CREB1) were determined by quantitative real-time polymerase chain reaction or Western blotting. Cell proliferation, migration, and invasion, the cell cycle and apoptosis were determined using a cell counting kit-8 assay, 5-ethynyl-2'-deoxyuridine assay, colony formation assay, wound healing assay, transwell assay, and flow cytometry assay. The interaction between miR-384 and circ_0043947 or CREB1 was verified by dual-luciferase reporter assay and RNA pull-down assay. The in vivo assay was conducted using a xenograft mouse model. Results: Circ_0043947 and CREB1 expression levels were significantly upregulated, whereas miR-384 expression levels were downregulated in GC tissues and cells. Functionally, knockdown of circ_0043947 inhibited cell proliferation, migration and invasion and induced G0/G1 phase arrest and apoptosis in vitro. Circ_0043947 could upregulate CREB1 expression by directly sponging miR-384. Rescue experiments showed that a miR-384 inhibitor significantly reversed the inhibitory effect of si-circ_0043947 on GC progression, and CREB1 overexpression significantly reversed the inhibitory effect of miR-384 mimics on the progression of GC cells. Furthermore, silencing of circ_0043947 inhibited tumor growth in vivo. Conclusions Circ_0043947 acted as an oncogenic factor in GC to mediate GC cell proliferation, migration, and invasion, the cell cycle and apoptosis by regulating the miR-384/CREB1 axis.Circ_0043947 may be a potential target for GC diagnosis and therapy.