Background Osteoclast stimulatory transmembrane protein (OC-STAMP) is involved in silicosis fibrosis induced by silicon oxide (SiO₂) exposure. Its role in silicosis fibrosis by inducing ferroptosis of alveolar type II epithelial cells and its related mechanism remain unclear. Objective To explore the effect and possible mechanism of OC-STAMP on ferroptosis of alveolar type II epithelial cells and silicosis fibrosis in rats under SiO₂ exposure. Methods Twenty male Wistar rats of SPF grade were randomly divided into two groups: control (Sham) group and SiO₂ group, 15 rats in each group. Rats in the SiO₂ group were given 1 mL of 50 mg·L⁻¹ SiO₂ suspension at one time through the non-exposed intratracheal instillation method to establish an animal model of silicosis, and rats in the Sham group were give 1 mL of 0.9% sodium chloride solution in the same way. Rats were sacrificed after 8 weeks. Samples of lung tissue were fixed in glutaraldehyde or paraformaldehyde for observing ultrastructure of mitochondria by transmission electron microscopy; HE, Masson, VG, and Prussian blue were used to observe changes in lung tissue structure and iron deposition. The expression level of OC-STAMP and the degree of lung fibrosis were evaluated by immunohistochemistry and immunofluorescence. The expression level of OC-STAMP in rat lung tissue was detected and the transfection effect of OC-STAMP was verified by real-time fluorescence quantitative polymerase chain reaction (RT-PCR). Overexpression (OCS group) and inhibition expression (SI-OC group) models were constructed by OC-STAMP plasmid and OC-STAMP small interfering RNA (siRNA) transfection to cultured MLE-12 cells, respectively. The relative expression levels of glutathione peroxidase 4 (GPX4), solute carrier family 7 member 11 (SLC7A11), and other proteins in lung tissue and MLE-12 were detected by Western blotting. Results The results of HE, Masson, and VG staining showed that the silicosis modeling was successful after 8 weeks of SiO₂ exposure. The immunofluorescence results showed that OC-STAMP and ATP binding cassette subfamily A member 3 (ABCA3) co-localized in alveolar type II epithelium. The immunohistochemical results showed that the levels of OC-STAMP and collagen I in the SiO₂ group were significantly higher than those in the Sham group (P<0.01). The RT-PCR results showed that the OC-STAMP mRNA in the lung tissue of the SiO₂ group was significantly higher than that of the Sham group (P<0.01). The Prussian blue staining in the lung tissue of the SiO₂ group showed positive brownish-yellow particles. Compared with the Sham group which showed normal mitochondrial structure, the mitochondrial structure was generally swollen and the mitochondrial cristae dissolved and disappeared in the SiO₂ group by transmission electron microscope observation. The Western blotting results showed that the expression levels of SLC7A11 and GPX4 both decreased in the lung tissue of the SiO₂ group (P<0.05, P<0.01), and the expression level of Vimentin increased (P<0.01). In the transfected MLE-12 cells, compared with the Sham group, the expression levels of SLC7A11 and GPX4 in the OCS group were significantly reduced (P<0.05, P<0.01). Conclusion OC-STAMP may affect the expression of proteins related to ferroptosis, and promote lung fibrosis induced by SiO₂ exposure.

Pear is one of the main fruits with thousands of years of cultivation history in China. There are more than 2000 varieties of pear cultivars around the world, including more than 1200 varieties or cultivars in China (Legrand et al., 2016). Xinjiang Uygur Autonomous Region is an important pear production region in China with 30 of varieties or cultivars. Pyrus sinkiangensis is the most popular variety, which is mainly distributed in Xinjiang (Zhou et al., 2018). Chlorogenic acid (CGA), p-coumaric acid, and arbutin are the main polyphenols in pear fruit, and their levels show great differences among different varieties (Li et al., 2014). CGA is a potential chemo-preventive agent, which possesses many important bioactivities including antioxidant, diabetes attenuating, and anti-obesity (Wang et al., 2021). Therefore, the specific CGA content of a variety is considered the embodiment of the functional nutritional value of pears.
Chlorogenic Acid ; Fruit ; Gene Expression Profiling ; Pyrus/genetics* ; Transcriptome

Based on the characteristics of forensic pathology, this paper explains the concept, connotation and advantages of holistic medicine and integrated medicine in the teaching of forensic pathology. Then, through the introduction of the specific teaching process design and effect analysis of the death cause analysis practical cases, it clarifies the necessity and effectiveness of integrated medicine and holistic medicine in the teaching of forensic pathology, and provides new ideas for the reform of the overall teaching of forensic pathology.

OBJECTIVE: To explore the genetic etiology of a child featuring global developmental and mental retardation. METHODS: Chromosome G-banding karyotype analysis, copy number variation sequencing (CNV-seq) and high-resolution chromosome banding were used to screen the genomic variant in the child and his parents. RESULTS: Both the child and his father were found to have a karyotype of 46,XY,del(18)(q21.1q21.3), whilst his mother was 46,XX. CNV-seq analysis showed that the child was arr[19]18q21.2-q21.32(chr18:48 422 190-58 039 582)×1, with a 10.58 Mb deletion which encompassed the TCF4 gene. The same deletion was found in neither parent. High-resolution banding revealed that the father has a fragment of 18q21.1q21.3 inserted into 5p13.1. CONCLUSION The child was diagnosed with Pitt-Hopkins syndrome due to the 18q21.2q21.32 deletion. Chromosome karyotyping and CNV-seq can effectively identify submicroscopic chromosome anomalies.
Child ; Chromosome Banding ; Chromosome Deletion ; DNA Copy Number Variations ; Facies ; Humans ; Hyperventilation ; Intellectual Disability/genetics*

Objective:To explore the incremental value of subtraction technique in evaluating the major features of liver reporting and data system version 2018 (LI-RADS v2018) on gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA) enhanced MRI.Methods:The Gd-EOB-DTPA enhanced MRI of 117 pathologically verified hepatocellualr carcinoma(HCC) from 87 high-risk patients in Henan Provincial People′s Hospital from January 2019 to July 2020 was analyzed retrospectively. The major features of LI-RADS in arterial phase, portal venous phase, subtraction and combined images were evaluated including nonrim arterial phase hyperenhancement (Nonrim APHE), nonperipheral washout and enhancing capsule. The lesions were graded according to LI-RADS v2018. According to the lesion size (<20 mm, ≥20 mm) and T 1WI signal intensity (hypointensity, isointensity or hyperintensity), the patients were divided into different subgroups. Cochran′s Q test was used for the comparison of the detection rate of the major features of LI-RADS and the accurate diagnosis rate based on LR-5 as the diagnostic standard among multiple groups. McNemar test was used for the comparison between two groups. Results:For all HCC, hypointensity HCC and HCC ≥20 mm, the detection rate of Nonrim APHE (χ2=12.190, 12.500, 10.083, all P<0.001) and the accurate diagnosis rate of HCC (χ2=14.450, 12.500, 10.083, all P<0.001) of subtraction images from arterial phase were significantly higher than that of arterial images. For HCC<20 mm, the detection rate of Nonrim APHE combined with arterial phase images was significantly higher than that in arterial phase images (χ2=5.143, P=0.016). For all HCC and isointensity or hyperintensity HCC, the detection rate of nonperipheral washout combined with portal venous phase images was higher than that in portal venous phase images (χ2=7.111, 6.125, P=0.004, 0.008). The detection rate of enhancing capsule of subtraction images from portal venous phase was higher than that of portal venous phase images in all groups (all P<0.017). The accurate diagnosis rate of subtraction images from portal venous phase in all HCC and HCC≥20 mm was higher than that in portal venous phase images (χ2=6.722, 6.750, P=0.008, 0.006). The accurate diagnosis rate of LR-5 in all groups using subtraction images from arterial phase and portal venous phase was higher than that of MRI images (all P<0.013). Conclusion:For Gd-EOB-DTPA dynamic enhanced MRI, subtraction images from arterial phase and portal venous phase are better than arterial phase and portal venous phase images in displaying Nonrim APHE, nonperipheral washout and enhancing capsule, which can improve the LI-RADS classification of HCC.

Objective To analyze the results of syphilis serology test results among hospitalized patients ,and to investigate the prevalence of syphilis .Methods T he results of syphilis antibody test of 199498 patients of Haikou People′s Hospital from 2011 to 2016 were retrospectively analyzed . All samples were screened by Treponema pallidum (TP) antibody using enzyme linked immunosorbent assay (ELISA) .Syphilis toluidine red unheated serum reagin test (TRUST ) was used to test nontreponemal antibody .The TP-ELISA positive samples were confirmed by Treponema pallidum particle agglutination test (TPPA) .Chi-square test was used for statistical analysis .Results A total of 7616 cases were positive of anti-TP ,with positive rate of 3 .82％ .From 2011 to 2016 ,the annual cases tested were 23188 ,32010 ,35079 ,35734 ,35406 and 38081 ,respectively .The annual positive rates of anti-TP w ere 4 .11％ (952/23188 ) ,3 .94％ (1261/32010 ) ,4 .55％ (1597/35079 ) ,3 .85％ (1376/35734 ) , 3 .47％ (1229/35406) ,and 3 .15％ (1201/38081) ,respectively ,and the difference was statistical significant (χ2 =108 .167 ,P<0 .05) .Anti-TP positive rate in male patients was 4 .85％ (4899 cases) , and 2 .76％ (2717 cases) in female ,and the difference was statistically significant ( χ2 =593 .443 , P<0 .05) .The positive rate of TP antibody in the elderly over 80 years old was 6 .09％ ,and 5 .03％ in patients older than 60 years old .In all samples ,TRUST was positive in 3413 cases (1 .71％ ) .From 2011 to 2016 , the annual positive cases were 179 , 390 , 585 , 768 , 816 and 675 , respectively , with coresponding rates of 0 .77％ ,1 .22％ ,1 .67％ ,2 .15％ ,2 .3％ and 1 .77％ ,respectively .The difference was statistically significant (χ2 = 763 .779 , P< 0 .05) .TRUST was positive in 2022 (2 .01％ ) male patients and 1391 (1 .41％ ) female patients ,and the positive rates were significantly different (χ2 =102 .887 ,P<0 .05) .From 2011 to 2016 ,the annual TRUST positivities among patients -9 years old and -19 years old were not different (χ2 = 1 .198 and 11 .018 ,both P> 0 .05) ,while those among patients aged -29 ,-39 ,-49 ,-59 ,-69 ,-79 ,and ≥80 years old were statistically different (χ2 =20 .100 ,38 .387 ,89 .360 ,75 .874 ,87 .743 ,71 .035 and 30 .593 ,respectively ,all P<0 .05) .Conclusions From 2011 to 2016 ,the positive rates of syphilis is increased and then decreased .And it is significantly different among different genders and age groups .The positive rate in elderly is significantly higher .

With the promulgation of a series of laws and regulations in our country, the requirement for stand-ardized management of clinical research process are gradually clear, and higher requirements on the following-up review management of ethics committee also are put forward. Through concluding and summarizing 128 noncompli-ance/violation or protocol deviation reports accepted by a hospital in recent two years, this paper analyzed four main problems including that the researchers at management level failed to report or report timely; the researchers reported in irregular filling;the same type of violation/deviation program happened repeatedly and the rectification to the review opinions of ethics committee was ineffective, and also put forward the corresponding suggestions, in order to strengthen and perfect the standard management of noncompliance/violation or protocol deviation report.

Objective: To investigate the clinicopathologic and molecular characteristics, diagnostic, differential diagnostic and prognostic features of malignant gastrointestinal neuroectodermal tumor. Methods: Two cases of malignant gastrointestinal neuroectodermal tumor were retrieved; the clinical and radiologic features, histomorphology, immunophenotype, molecular genetics and prognosis were analyzed and the relevant literature reviewed. Results: Case 1 was a 57-year-old male, presented with recurrent abdominal pain and melena. Pelvic imaging showed a circumscribed thickening of the wall of a small intestinal segment, and a malignant lymphoma was favored. Case 2 was a 24-year-old male, presented with recurrent small intestinal malignancy. Imaging demonstrated multiple masses in the peritoneal and pelvic cavities, and a malignant gastrointestinal stromal tumor with multiple metastases was suspected. Grossly both tumors were located mainly in the muscularis propria of small intestine. Case 1 showed a single 5.5 cm tumor; and case 2 consisted of two tumors measuring 4 cm and 6 cm respectively. Microscopic examination of both tumors showed small round blue, but focally spindled or clear tumor cells in solid pattern. The tumor cells had scanty cytoplasm, indistinctive nucleoli and brisk mitoses. Osteoclast-like giant cells were dispersed within the stroma. In case 1 rosette-like and pseudo-papillary growth patterns were noted, and in case 2 there were variable-sized hemorrhagic cysts. By immunohistochemistry, both tumors showed strong and diffuse expression of SOX10 and S-100, and focal to diffuse expression of neuroendocrine markers (CD56 or synaptophysin). Case 2 exhibited focal reactivity to pan-cytokeratin. Both tumors lacked expression of markers associated with gastrointestinal stromal tumor, smooth muscle tumor, melanoma (HMB45 or Melan A), dendritic cell tumor and Ewing sarcoma. Fluorescence in situ hybridization analysis demonstrated EWSR1 rearrangement in both tumors and the next generation sequencing confirmed EWSR1-ATF1 gene fusion in case 2. At follow-up of 16 months, case 1 was recurrence or metastasis free; whereas case 2 showed multiple recurrences and metastases within 19 months although stable disease was transiently achieved when treated with combinations of multidrug and targeted chemotherapy. Conclusions Malignant gastrointestinal neuroectodermal tumor is a rare and aggressive soft tissue sarcoma with a predilection for small intestine. It has distinctive morphologic, immunohistochemical and molecular characteristics and needs to be distinguished from other small blue round and spindle cell tumors that occur in the gut. Careful attentions to its characteristic histomorphology with the judicious use of immunohistochemistry and molecular genetics can help to distinguish this tumor from its many mimickers.

Objective To investigate the clinical efficacy of combined detection of VCA-IgA and Rta-IgG in the diagnosis of nasopharyngeal carcinoma.Methods From May 2013 to November 2014, 3 913 serum samples(male 2 367,female 1 546) from healthy people who had health examination in our medical center were collected and 169 serum samples(male 118,female 51) were collected from the patients who were diagnosed as nasopharyngeal carcinoma by pathological biopsy.Serum samples in two groups were detected by EBV RTA-IgG, VCA-IgA assay ( ELISA ) respectively.SPSS17.0 statistical software and receiver operating characteristic curve ( ROC) were applied to data analysis.Results The Rta-IgG positive rates of EB virus were 93.5%in NPC group (158/169) and 2.4%(93/3 913) in healthy group;while the VCA-IgA positive rates were 79.3%in NPC group ( 134/169 ) and 8.9% ( 349/3 913 ) in healthy group. The sensitivity(χ2 =14.49,P<0.05) and specificity(χ2 =157.15,P<0.05) of Rta-IgG in the diagnosis of nasopharyngeal carcinoma were significantly better than that of VCA-IgA. Using VCA-IgA/Rta-IgG combined detection analysis, not only failed to effectively improve the diagnosis of nasopharyngeal cancer, but to reduce the detection sensitivity to 72.8%( 123/169 ) , compared with Rta-IgG detection only. Conclusions Rta-IgG is significantly better than that of VCA-IgA.There was no significant improvement in the clinical diagnostic efficacy of nasopharyngeal carcinoma using VCA-IgA/Rta-IgG combined detection mode.

Objective To investigate the short-term efficacy of CT-guided radiofrequency ablation (RFA) for the treatment of advanced non-small cell lung cancer. Methods During the period from June 2010 to June 2013, a total of 100 patients with advanced non-small cell lung cancer were admitted to authors’ hospital. The patients were equally and randomly divided into the study group (n=50) and the control group (n=50). The patients of the control group received concurrent radiotherapy and chemotherapy treatment, while the patients of the study group received CT-guided RFA. The clinical effect, changes in CT values after the treatment, the improvement of physical condition and postoperative complications were recorded, and the results were compared between the two groups. Results The remission rate of the disease in the study group was 86.0%, which was much higher than that in the control group (52.0%), and the difference between the two groups was statistically significant (P<0.05). After the treatment, the CT value of the study group was (14.1±3.9) HU, which was significantly lower than that of the control group (29.8±4.7 HU, P<0.05). The physical improvement rate of the study group (66.0%) was significantly higher than that of the control group (44.0%), the difference between the two groups was statistically significant (P<0.05). The occurrence of postoperative complications, such as pulmonary infection, chest pain, fever, thoracic effusion and gastrointestinal reaction, in the study group was strikingly lower than that in the control group (P<0.05). Conclusion For the treatment of advanced non-small cell lung cancer, CT-guided radiofrequency ablation is safe and less-invasive, it can improve the clinical short-term effect as well as the quality of life. Therefore, this technique should be recommended in clinical practice.