Objective:To analyze differential diagnosis and imaging feature of ultrasonography and MRI for adrenal pheochromocytoma.Methods: The manifestations of the preoperative ultrasound and MRI of the 37 patient with adrenal pheochromocytoma who once were confirmed by pathology were analyzed by the retrospective analysis. The result of pathology was used as standard to analyze the accuracy rate and clinical feature of the two detection methods in the diagnosis of adrenal pheochromocytoma.Results: The results of pathological diagnosis for the 37 cases showed that 35 cases were benign and 2 cases were malignant. After the results of preoperative ultrasound was tested by using pathology, the tested results of 37 cases showed 32 cases were adrenal pheochromocytoma, 2 cases were adrenocortical adenocarcinoma and 3 cases were adrenal adenoma. As these results, the accuracy rate of preoperative ultrasound was 86.49%. And after the results of preoperative MRI was tested by using pathology, the tested results of 37 cases showed that 34 cases were adrenal pheochromocytoma, 2 cases were adrenocortical adenocarcinoma and 1 case was adrenal adenoma. And its accuracy rate was 91.89%. Therefore, if patients were diagnosed with adrenal pheochromocytoma by using preoperative imaging detection, they should be considered to receive further diagnosis so as to distinguish adrenal pheochromocytoma with adrenal adenoma, adrenocortical adenocarcinoma, metastatic tumor and lipomatous. Conclusion: Both of ultrasound and MRI can accurately achieve location, diagnosis of qualitative identification for adrenal pheochromocytoma, and the clinical feature and imaging feature which combined the two detections can increase the detectable rate and accuracy rate for adrenal pheochromocytoma.

Objective To investigate the efficacy of twice irradiating with focused ultrasound on recurrent and metastasized U14 cervical cancer implanted in the legs of mice. Methods Seventy-two mice with U14 cervical cancer cells implanted in their legs were divided into three groups randomly,with 24 rats in each group.One group received a single dose of focused ultrasound,while mice in the second group were irradiated twice and surgery resection was administered to the third group 7 or 8 days after the tumor was implanted.After 23 days post implantation of the tumor,local tumor recurrence and metastasis to the lungs and lymph nodes were evaluated. Results The inhibition rate after double irradiation was 61.70％ for local recurrence and 68.18％ for metastasis,significantly higher than in the other two groups. Conclusions Both single and double irradiation with focused ultrasound are effective for inhibiting local recurrence and metastasis,but double irradiation is more effective.

Objective To investigate the effects of quercetin with a special focus on their effect on macrophage po-larization after SCI.Methods Adult C57 mice underwent T10 spinal cord clip compression injury,then were ran-domly divided into SCI group and quercetin group.1-14 d after SCI received quercetin by intraperitoneal injection(once a day)in quercetin group,and received same normal saline in the SCI group.3,7 and 14 d after SCI, the lesion section of SCI group and Quercetin group stained by immunofluorescent:M1 macrophages pheno-type cell labeled with iNOS, and M2 macrophages phenotype cell labeled with Arg1.The mRNA expression of inflammatory factors in lesion site was detected by RT-PCR.The motor function was evaluated by Basso mouse scale(BMS)after SCI.Results Compare with SCI group,the expression of arginase-1(associated with M2 mac-rophage phenotype)significantly increased in quercetin group(P<0.05).The expression of inducible nitric oxide synthase-iNOS(M1 phenotype marker)was down-regulated as demonstrated using immunohisto-chemistry(P<0.05).Furthermore,the production of NOS2 and tumor necrosis factor alpha was significantly reduced whereas the level of interleukin 10 and TGF-β were elevated in quercetin group(P<0.05).The time course of functional recov-ery revealed a gradual recovery in the subacute phase in quercetin group, little improvement was observed in SCI group(P<0.05).Conclusions It is found that quercetin may promote the shift of M1 to M2 phenotype and amelio-rate the inflammatory microenvironment.Furthermore,the roles of quercetin in immunity modulation may enhance neuroprotective effects and partially contribute to the locomotor functional recovery after SCI.

Objective:To describe the clinicopathological features of pulmonary artery intimal sarcoma (PAIS), and to understand its molecular alterations.Methods:Sixty cases of pulmonary artery endarterectomy performed at the China-Japan Friendship Hospital, Beijing, China from January 2017 to January 2020 were reviewed. Clinical data of 5 patients with pulmonary artery intimal sarcoma were collected. Hematoxylin-eosin staining, immunohistochemistry staining and fluorescence in situ hybridization (FISH) were performed to evaluate the pathological features. RNA sequencing was conducted to assess the fusion gene changes in PAIS.Results:The detection rate of PAIS was 8.3% (5/60), with the median age of 49 years and a female predominance. Their clinical manifestations were non-specific. Histopathological examination showed that the tumors were composed of malignant spindle or epithelioid cells, with various degrees of atypia. Focal heterologous osteosarcomatous or leiomyosarcomatous differentiation was noted. The tumor cells could express PDGFRA, CDK4 and MDM2 with co-amplification of MDM2, CDK4 and EGFR genes. RNA sequencing detected multiple in-frame fusions in the tumors.Conclusions:PAIS is a rare, highly heterogeneous, and poorly-or un-differentiated sarcoma accompanied by complex changes of multiple genes.It has no known effective treatments, and thus has a poor prognosis.

Objective:To investigate the impact of neferine(NEF)on the blood-brain barrier in ischemic stroke(IS)rats by regulating the CC chemokine ligand 2(CCL2)-CC chemokine receptor 2(CCR2)signal pathway.Methods:SD rats were randomly divided into model group,low-dose NEF group(NEF-L group,25 mg/kg NEF),high-dose NEF group(NEF-H group,50 mg/kg NEF),and high-dose NEF+CCR2 antagonist group(NEF-H+RS102895 group,50 mg/kg NEF+10 mg/kg RS102895),sham opera-tion group(Sham group),with 15 rats in each group.The neurological function scores of rats in each group were compared.The perme-ability of blood-brain barrier of rats in each group was evaluated by Evans blue(EB)permeation method.The water content of brain tis-sue of rats in each group was determined by dry and wet weight method.The expression levels of CCL2 and CCR2 mRNA in rat brain tissue were measured by real-time fluorescence quantitative PCR(RT-qPCR).The expression levels of CCL2,CCR2,ZO-1 and Clau-din-5 proteins in rat brain tissue were detected by Western blot.Results:Compared with Sham group,the neural function score,EB content,water content,the expression levels of CCL2,CCR2 mRNA and protein in the right brain tissue of the model group were obvi-ously higher(P<0.05),the expression levels of ZO-1 and Claudin-5 were lower(P<0.05).Compared with the model group,the neuro-logical function score,water content,EB content,the expression levels of CCL2,CCR2 mRNA and protein in the right brain tissue of rats in the NEF-H group were obviously lower(P<0.05),the expression levels of ZO-1 and Claudin-5 were obviously higher(P<0.05).RS102895 enhanced the protective effect of NEF on the blood-brain barrier in IS rats.Conclusion:NEF may protect the blood-brain barrier of IS rats by inhibiting CCL2-CCR2 signal pathway.

tRNA(transfer RNA)is the most highly modified RNA in mammalian cells.Their modifications are highly dynamic and easily af-fected by environmental conditions.Notably,tumor occurrence is often accompanied by abnormal tRNA modifications.Studies have re-vealed abnormal expression of tRNA-modified enzymes in a variety of tumor tissues,thereby associating them to pathogenesis of the dis-ease.Glioma is the most common primary tumor of the central nervous system having the highest incidence of malignancy and poor pro-gnosis.This study provides a comprehensive review of several tRNA modifications associated with gliomas,describing their functions and mechanisms in the occurrence and development of these tumors.We aimed to investigate the potential of aberrantly modified tRNAs and their derivative fragments as biomarkers in glioma diagnosis and propose novel strategies for glioma therapy using small molecule inhibitors that target epigenetic regulatory factors.

The objective of this study was to explore the clinical significance of measuring serum free light chains (sFLC) and to compare with serum total light chains (free and binded) in multiple myeloma (MM). sFLC in 20 newly diagnosed MM patients and 20 cases of healthy people as control were measured by immuno-nephelometric assays; the serum light chains and kappa/lambda ratio were measured in all patients, while immunofixation electrophoresis (IFE) tests were carried out at the same time in 18 out of 20 patients. The results showed that the abnormality of serum free light chains and kappa/lambda ratio were found in all of the 20 newly diagnosed MM patients (p < 0.01). The measurement of sFLC showed higher sensitivity than the total serum chains (p < 0.01). It is concluded that the method testing sFLC by immuno-nephelometric assay combined with kappa/lambda ratio is valuable for MM diagnosis, and the measurement of sFLC can be used as one of indicators for MM diagnosis.
Adult ; Aged ; Biomarkers, Tumor ; blood ; Female ; Humans ; Immunoglobulin kappa-Chains ; blood ; Immunoglobulin lambda-Chains ; blood ; Male ; Middle Aged ; Multiple Myeloma ; blood

OBJECTIVETo observe the effect of ultrasound stimulation at the acupoint Guanyuan (CV 4) on follicular development in menopausal rats.

METHODSMenopausal female SD rats were selected by vaginal smear examinations. The rats were subjected to ultrasound stimulation at the acupoint Guanyuan with the output power of 0.1 W, working frequency of 9 MHz, and focal length of 4.5-5 mm. Electrochemiluminescence immunoassay was used to detect the serum estrogen levels of the menopausal rats. The changes in the ovarian tissue histology and the follicle number were observed.

RESULTSCompared with the control group, a 10-day ultrasound stimulation for 10 and 5 min daily at Guanyuan significantly increased the serum estrogen levels and the numbers of primary and secondary follicles (P<0.05) and reduced the number of atretic follicles in the menopausal rats (P<0.05).

CONCLUSIONUltrasound stimulation at the acupoint Guanyuan can increase the estrogen secretion function and promote the development of follicles in menopausal rats.

Acupuncture Points ; Animals ; Estrogens ; blood ; Female ; Menopause ; Ovarian Follicle ; growth & development ; Rats ; Rats, Sprague-Dawley ; Sonication

OBJECTIVES: To analyze the relationship among electrical conductivity （EC）, total volatile basic nitrogen （TVB-N）, which is an index of decomposition rate for meat production, and postmortem interval （PMI）. To explore the feasibility of EC as an index of cadaveric skeletal muscle decomposition rate and lay the foundation for PMI estimation. METHODS: Healthy Sprague-Dawley rats were sacrificed by cervical vertebrae dislocation and kept at 28 ℃. Muscle of rear limbs was removed at different PMI, homogenized in deionized water and then skeletal extraction liquid of mass concentration 0.1 g/mL was prepared. EC and TVB-N of extraction liquid were separately determined. The correlation between EC (x₁) and TVB-N (x₂) was analyzed, and their regression function was established. The relationship between PMI (y) and these two parameters were studied, and their regression functions were separately established. RESULTS: The change trends of EC and TVB-N of skeletal extraction liquid at different PMI were almost the same, and there was a linear positive correlation between them. The regression equation was x₂=0.14x₁-164.91(R²=0.982). EC and TVB-N of skeletal muscle changed significantly with PMI, and the regression functions were y=19.38x₁³-370.68x₁²+2 526.03 x₁-717.06(R²=0.994), and y=2.56x₂³-48.39x₂²+330.60x₂-255.04(R²=0.997), respectively. CONCLUSIONS EC and TVB-N of rat postmortem skeletal muscle show similar change trends, which can be used as an index for decomposition rate of cadaveric skeletal muscle and provide a method for further study of late PMI estimation.
Animals ; Autopsy ; Electric Conductivity ; Forensic Pathology ; Muscle, Skeletal/pathology* ; Nitrogen ; Postmortem Changes ; Rats ; Rats, Sprague-Dawley ; Time Factors

Ear Neoplasms/surgery* ; Ear, Middle/surgery* ; Humans ; Papilloma, Inverted/surgery*