Objective To study the CT features and enhance the knowledge of peripheral primitive neuroectodermal tumors(pPNETs). Methods The CT appearances of 6 patients with pPNETs pathologically proved were analyzed retrospectively. Results The CT findings of 5 bone pPNETs were soft mass of homogeneous or heterogeneous density and osteolytic destruction without osteosclerosis, periosteum reaction and tumor bone formation. Follow up CT showed the mass shrunken significantly after radiotherapy in one case. In 1 patient of chest Askin tumor, the lesion appeared as a vast heterogeneous soft mass with moderate inhomogeneous enhancement. The mass invaded mediastinum and local bone destruction were not detected. Four months after operation, a small homogeneous tumor occurred in right chest wall with moderate homogeneous enhancement. Conclusion The manifestations of pPNETs on CT have no characteristics. However, CT can show the intra tumor structures and the extent of the tumor very well, which is helpful in differentiating diagnosis,predicting resectability, detecting distant metastases and evaluating the response to treatment.

Objective To determine bone mineral density (BMD) and biochemical parameters of bone metabolism in premenopausal female patients with systemic lupus erythematosus(SLE), and investigate the correlation between them. Methods Lumbar and femoral BMD in 30 female patients with SLE was determined by dual energy X ray absorptiometry. In 30 female patients and 39 controls, the corrected serum levels of calcium, phosphorus, alkaline phosphatase, creatinine and albumin were measured by routine methods, and bone specific isoform of alkaline phophatase, propeptide of type 1 procollagen, deoxypyridinoline excretion, telopeptide of type 1 collagen, osteocalcin, parathyroid hormone, 25-OH vitamin D, testosterone, progesterone, estradiol, follicle stimulating hormone and luteinotropic hormone were measured by ELISA or RIA. Results According to the WHO criteria, 39% patients with SLE had normal BMD, 46% had osteopenia and 15% had osteoporosis at the lumbar spine; at the femoral neck 38.5% had normal BMD, 38.5% had osteopenia and 23% suffered form osteoporosis. All other bone resorption and formation markers measured were not significantly different except significantly higher corrected serum levels of albumin calcium (P=0.0001)and significantly lower osteocalcin level and phosphorus value(P=0.03,P=0.002) were found in the SLE patients. Of all sex hormones tested lower testosterone and higher follicle stimulating hormone concentration were seen in patients with SLE(P=0.001,P=0.42). Conclusion A high incidence of osteopenia and osteoporosis was found in premenopausal patients with SLE, which seems to be attributable, at least in part , to decreased bone formation in SLE patients.

Objective:To prepare resveratrol microemulsions by high pressure homogenization method and characterize the microe-mulsions. Methods:Using the particle size, polydispersion index and encapsulation efficiency as the indicators, the independent varia-bles of the preparation were inspected, and the microemulsions were characterized. The stability of resveratrol microemulsions was stud-ied by long term stability test preliminarily. Results:The mean particle size, polydispersion index and zeta potential of resveratrol mi-croemulsions was (231 ± 37. 8) nm, 0. 228 ± 0. 047 and ( -42. 5 ± 4. 3) mV, respectively. The microemulsions were found to be small and spherical with smooth surface under a transmission electron microscope. Long term stability studies showed that the microe-mulsions were stable in 3 months after stored at 25℃. Conclusion:The preparation process of high pressure homogenization method for resveratrol microemulsions is simple and feasible.

Exons encoding the variable regions of the light and heavy chain of the murine McAb HIT3a against CD3 antigen were isolated from HIT3a gene library and inserted into mammalian expression vectors containing the human K and y1 region exons. The chimeric genes were transfected into murine SP2/0 hybridoma cells by Lipofectin. Antibody levels of culture supernatants from transfectomas ranged 21~32 ?g/ml. The chimeric antibodies bound specifically to human T cells and competed effectivelly with the parental anti-CD3 murine McAb for binding to CD3 antigen on human T cells. The ability to promote antibody-dependent cell-mediated cytolysis was significantly enhanced with the chimeric antibodies as compared with anti-CD3 murine McAb. The mitogenic activity of human T cells can be suppressed and enhanced by the anti-CD3 chimeric antibodies. The cytotoxicity to tumor cells and proliferation of human T cells mediated by the anti-CD3 chimeric antibodies were much higher than IL-2 alone. Chimeric HIT3a antibody is a clinically relevant, genetically engineering antibody with potential use in treatment of graft-versus-host disease in tranplantation, autoimmune diseases and some tumors.

[Summary] Postoperative cognitive dysfunction ( POCD) is a common central nervous system complication after anesthesia and surgery.The mechanisms of POCD are not clear yet.The article reviewed several potential mechanisms that have been reported. Further researches are needed to identify the pathophysiologic progress of POCD, which have great clinical and economic values.

Objective To study the features of pulmonary cryptococcosis and the curative effect of thoracoscopic operation for it. Methods The authors retrospectively analyzed the clinical data of 11 patients with pulmonary cryptococcosis in this hospital between January 1996 and December 2002, consisting of 8 cases of thoracoscopic wedge resection, 2 cases of thoracoscopy-assisted modified posterolateral mini-lobectomy, and 1 case of pulmonary wedge resection. Results Ten patients were preoperatively misdiagnosed. Solitary lesions were found in 8 patients and multiple lesions in both lungs in 3 patients. Complete removal of lesions was achieved in 8 patients and pulmonary biopsy was conducted in 3 patients. Except for 3 cases of wound effusion, there were no other postoperative complications. Follow-up for (38.6?10.8) months (range, 12～72 months) found no pyothorax, bronchopleural fistula, or recurrence of cryptococcosis. Conclusions Pulmonary cryptococcosis usually makes its appearance as a solitary lesion without underlying diseases or symptoms, which is difficult to diagnose preoperatively. Video-assisted thoracoscopic surgery can remove the lesion completely, giving a minimal invasion and rapid recovery.

Carpal tunnel syndrome (CTS) is a common peripheral neuropathy, which include a series of symptoms results from median nerve injury. Electrical physical examination is the gold standard for diagnosis of CTS. More new technology, such as high frequency ultrasound and magnetic resonance imaging, provides more information for the diagnosis of CTS.

【Objective】 To investigate the effect of AIDET communication mode in informing blood donors of reactive viral markers results. 【Methods】 Blood donors who came FOR COUNSELLING AFTER NOTIFICATION OF THEIR REACTIVE SCREENING TEST RESULTS from Jan 2018 to Sep 2021 were selected as the subjects. They were divided into two groups according to the blood donation time and notification mode: control group who were notified by a conventional mode(n=128), from Jan 2018 to Dec 2019, and the experimental group(n=92) who were notified by AIDET mode, from Jan 2020 to Sep 2021. The anxiety state and degree of satisfaction to the notification were compared between the two groups. 【Results】 After attending COUNSELLING, the anxiety level of the experimental group was significantly lower, while the degree of satisfaction to the notification was significantly higher than that of the control group (P<0.05). 【Conclusion】 AIDET communication mode established a standardized and effective communication channel and reduced the anxiety of blood donors WHEN NOTIFYING THE REACTIVE SCREENING TEST RESULTS. Moreover, it can enhance the trust and satisfaction between donors and medical staff as well as the quality of notification, which is of great significance to promote the healthy and continuous development of voluntary blood donation.

Liposomes can be cleared by the reticuloendothelial system (RES) when it is in the blood circulation in the body. And they can accumulate in the organs rich in RES in the body by passive targeting. Targeting of the liposomes is an important factor for its use as a drug carrier, and particle size as well as surface charge are important for its in vivo targeting. In this paper, studies on the influences of particle size and surface charge of the liposomes on cell binding and phagocytosis mechanism were reviewed. A comprehensive review on passive targeting effect of the particle size and surface charge of liposomes on blood, liver, spleen as well as tumor tissue was made. At last, an outlook for future research directions was made.

Objective To analyze the prevalence and genetic characteristics of influenza A(H3N2) viruses in the city of Xiangyang in 2022-2023, and to provide a scientific basis for predicting the epidemic and mutation of influenza virus. Methods Throat swab specimens of the influenza like cases were collected from national influenza monitoring sentinel hospitals in Xiangyang every week. RNA was extracted from the specimens for influenza diagnosing using real-time RT-PCR．Viruses were isolated from H3N2 positive specimens, and HA and NA genes were amplified and sequenced．3D modeling analyses were conducted. Results The gene phylogenetic tree showed that the H3N2 isolates in 2022-2023 belonged to 3C.2a1b.2a1 and 3C.2a1b.2a2 branches, respectively. The A(H3N2) influenza virus strains all had amino acid point mutation sites on important antigenic determinants of HA protein. The epitope mutations of the 2022 A(H3N2) strain mainly occurred in regions B, C, and D. The epitope mutations of the A(H3N2) strain in 2023 mainly occurred in regions C and D. Different glycosylation sites of HA gene were found in 2022-2023 strains. No variation was found in key amino acid sites associated with neuraminidase inhibitor resistance. The difference of overall structure was not obvious in the three-dimensional simulation structure diagram. Conclusion The A(H3N2) influenza strains isolated in this study have shown antigenic drift, especially the mutation of HA, which may affect the protective effect of the vaccine on the local population and lead to influenza epidemic. The variations of HA and NA suggest that close attention should be paid to the epidemic and genetic variation of H3N2 subtype influenza virus, to provide a scientific basis for the selection of influenza virus vaccine strains and the prevention and control of influenza.