s:To resolve the problem of the accuracy and standardization of STR PCR typing in forensic science practice,we have designed a new method to produce standard D12S375 allelic ladder.Seven different PCR amplified D12S375 allelic fragments were isolated from the gel,eluted into the distilled water and reamplified by PCR.The purified allelic fragments were then blunt end subcloned individually into the pUC plasmid vectors and transfected into competent E.coli DH5? TM cells.The sequencing results confirmed that the size and the constructure of the inserts were correct.The recombinant plasmids DNA with 7 inserts were then used as templates for reamplification to generate D12S375 standard ladder, with which the genetic polymorphisms of D12S375 locus in Chinese Han population in Chengdu,Hui population in Gansu and Wei population in Xinjiang were studied.

The effects of pro-hepatocyte growth factor (pHGF) on the changes of renal cellular proliferative cycle of partial hepatectomized rats were observed by flow cytometry (FCM). S phase fraction (SPF) of control rats (group A) accounted for 7.58 % and increased gradually within 6 h, following a peak at 12th or 36th h after operation, but in pHGF-treated rats (group B) the peak appeared at 24th h after operation. Proliferation index (PI) of group A was 13.2%before partial hepatectomy, increased within 6 h and reached a peak at 12th or 36th h after operation, and in group B the peak appeared at 48th h after operation. There were significant differences in SPF and PI between two groups (P＜0.01). These findings suggest that pHGF may nonspecifically promote the DNA synthesis of renal cells.

The effects of pro-hepatocyte growth factor (pHGF) on the changes of renal cellular proliferative cycle of partial hepatectomized rats were observed by flow cytometry (FCM). S phase fraction (SPF) of control rats (group A) accounted for 7.58 % and increased gradually within 6 h, following a peak at 12th or 36th h after operation, but in pHGF-treated rats (group B) the peak appeared at 24th h after operation. Proliferation index (PI) of group A was 13.2%before partial hepatectomy, increased within 6 h and reached a peak at 12th or 36th h after operation, and in group B the peak appeared at 48th h after operation. There were significant differences in SPF and PI between two groups (P＜0.01). These findings suggest that pHGF may nonspecifically promote the DNA synthesis of renal cells.

OBJECTIVE: This experiment aims to determine the diagnostic value of diffusion-weighted imaging (DWI) in the differentiation of axillary inflammatory lymph nodes from metastatic lymph nodes in rabbit models in comparison with conventional magnetic resonance imaging (MRI). MATERIALS AND METHODS: Conventional MRI and DWI were performed at 4 weeks after successful inoculation into the forty female New Zealand white rabbits' mammary glands. The size-based and signal-intensity-based criteria and the relative apparent diffusion coefficient (rADC) value were compared between the axillary inflammatory lymph nodes and metastatic lymph nodes, with histopathological findings as the reference standard. Receiver operating characteristic (ROC) curve analysis was performed to evaluate the diagnostic performance of the aforementioned criteria and rADC value in differentiating the axillary inflammatory lymph nodes from metastatic lymph nodes. RESULTS: Thirty-two axillary inflammatory lymph nodes and 46 metastatic ones were successfully isolated and taken into pathological analysis. The differences of the aforementioned criteria between the two groups were not statistically significant (p > 0.05). However, the rADC value of the inflammatory lymph nodes (0.9 +/- 0.14) was higher than that of metastatic ones (0.7 +/- 0.18), with significant difference (p = 0.016). When the rADC value was chosen as 0.80, the area under the ROC curve is greater than all other criteria, and the sensitivity, specificity, accuracy, positive predictive value, and negative predictive value for differentiating two groups were 86.2%, 79.3%, 81.2%, 84.2%, and 85.6%, respectively. CONCLUSION: Diffusion-weighted imaging is a promising new technique for differentiating axillary inflammatory lymph nodes from metastatic lymph nodes. Compared with routine magnetic resonance sequences, DWI could provide more useful physiological and functional information for diagnosis.
Animals ; Axilla ; Diagnosis, Differential ; Diffusion Magnetic Resonance Imaging ; Female ; Inflammation/pathology ; Lymphatic Metastasis/*pathology ; Magnetic Resonance Imaging/*methods ; Mammary Neoplasms, Experimental/*pathology ; ROC Curve ; Rabbits ; Sensitivity and Specificity

OBJECTIVETo resolve the problem of the accuracy and standardization of short tandem repeat-polymerase chain reaction (STR-PCR) typing in forensic practice, the authors have designed a new method of producing standard D12S391 allelic ladder.

METHODSNine different PCR amplified D12S391 allelic fragments were isolated from the gel, eluted into the distilled water and re-amplified by PCR. The purified allelic fragments were then blunt-end subcloned individually into the pUC plasmid vectors and transfected into competent E.coli DH5 alpha(TM) cells. The sequencing results confirmed that the size and the structure of the inserts were correct. The recombinant plasmids DNA with 9 inserts were then used as templates for PCR re-amplification to generate D12S391 standard ladder.

RESULTSWith the ladder, the authors studied the genetic polymorphisms of D12S391 locus in six populations (German, Japanese and Chinese south-western Han, northern Han, Weiwu'er and Hui populations), and the respective primary data in the six populations were obtained. D12S391 locus showed high polymorphism in all six populations, and its exclusion power and discrimination power are 0.609-0.786 and 0.940-0.952 respectively.

CONCLUSIONThe results demonstrate that the standard ladder generated via this method is excellent, and D12S391 locus is robust for genetic research and forensic application.

Alleles ; Asian Continental Ancestry Group ; genetics ; China ; European Continental Ancestry Group ; genetics ; Forensic Medicine ; Genetics, Population ; Germany ; Humans ; Japan ; Polymerase Chain Reaction ; Polymorphism, Genetic ; Tandem Repeat Sequences ; genetics

Objective To investigate risk factors of postoperative pulmonary infection in patients with liver cancer. Methods A total of 120 patients with primary liver cancer patients were divided into infected group(12 cases) and non-infected group(108 cases), two groups of patients in sex, age, underlying disease, whether ascites before surgery, surgery transfusion amount of time, blood loss, intraoperative, duration of mechanical ventilation index differences were com-pared and line Logistic regression analysis of its risk factors. Results In 120 cases of hepatocellular carcinoma 12 cases of postoperative pulmonary infection, the rate was 10.0%. The differences of age, underlying disease, whether ascites preoperative, operative time, blood loss, intraoperative blood transfusion, duration of mechanical ventilation in non-in-fected group and the infection group were statistically significant (P<0.05). Conclusion Age>60 years, underlying dis-ease, preoperative ascites, long operation time, blood loss volume, blood transfusion volume, length of mechanical venti-lation independent are risk factors for lung infections in patients with liver cancer after surgery.

Objective : To summarize the clinical experience of removing infratemporal fossa and pterygopalatine fossa foreign bodies via a trans-oral approach. Methods: The clinical data of 9 patients with foreign bodies in the infratemporal fossa and pterygopalatine fossa hospitalized from March 2008 to June 2017 were analyzed retrospectively. Among these cases, 4 were flying injuries, 2 were falling injuries, 2 were traffic injuries and 1 was an iatrogenic syringe injury. Foreign bodies were divided into the following categories: 3 cases of wood from branches, 3 cases of iron filings, 2 cases of broken glass, and one case of a broken syringe needle. Before surgery, all subjects underwent spiral CT three-dimensional reconstruction and CT angiography examinations. After accurately determining the relationship between the foreign body and the internal and external carotid arteries and their branches, patients underwent an operation under general anesthesia to remove the foreign body via a trans-oral approach. In addition, patients participated in mouth opening training for one week. Then, patients were followed for 1 to 6 months. Foreign bodies were removed completely in all 9 patients. Results: Foreign bodies were independently located in the pterygopalatine fossa in 2 cases and in the in fratemporal fossa in 3 cases. There were 4 cases of foreign bodies located in both the infratemporal fossa and the pterygopalatine fossa. All 9 patients had the foreign bodies completely removed and were discharged one week after surgery. They were followed for 1 to 6 months. Their mouth opening and occlusion were normal, without any complications. Conclusion Spiral CT, 3D reconstruction and CT angiography examinations are necessary and important for accurate pre-operation positioning. It is feasible to remove foreign bodies in the infratemporal fossa and pterygopalatine fossa via a trans-oral approach.

Objective:To explore the evolution of CT characteristics of the "reversed halo sign" of pulmonary tuberculosis, and to further improve the recognition of its CT signs.Methods:Clinical and CT data of 12 patients with pulmonary tuberculosis who were clinically and pathologically confirmed and accompanied with CT manifestation of "reversed halo sign" in First Affiliated Hospital of Henan University of Science and Technology from August 2013 to April 2020 were analyzed retrospectively. Pathological and imaging contrastl analysis was performed on 1 patient undergoing surgical treatment.Results:Among 12 cases with "reversed halo sign", there were 2 cases with single lesion in unilateral lung, 2 cases with multiple lesions in unilateral lung, and 8 cases with multiple lesions in bilateral lungs. Three cases showed only "reversed halo sign", 9 cases showed both halo-like sign and uniform fireworks sign. "Tree-in-bud "sign was found in all 12 patients in the outer ring of the "reversed halo sign". Eight patients received three or more CT examinations, and six of them showed reduction of density and volume of the "reversed halo sign" after standardized anti-tuberculosis treatment. Under the natural course of the disease in two cases, the overall enlargement of the lesion was observed in 1 case, and the overall density of the lesion was reduced and the outer ring wall of the "reversed halo sign" was thinned in 1 case. The pathology of one case after surgical lobectomy showed granulomatous inflammatory nodules of varying sizes containing Langerhans nodule giant cells in the lung parenchyma. The typical caseous necrotic granulomatous nodules were rare here. The "reversed halo sign" showed dense Langerhans nodules in the outer ring, sparse central areas with fibrous hyperplasia and alveolar wall thickening.Conclusions:The outer ring of "reversed halo sign" of pulmonary tuberculosis shows as "tree-in-bud" sign, and its center shows as the fine reticulation pattern. After effective anti-tuberculosis treatment, both the overall density of "reversed halo sign" and the lesion size reduced. Finally, the lesions mostly present as as fine grid shadows for a long time.