Objective To evaluate the clinical effects of autologous bone marrow transplantation(ABMT) in the treatment of patients with acute leukemia.Methods A retrospective study was accomplished on the ABMT in the treatment of 35 patients with acute leukemia from Oct 1999 to Oct 2004.The median age of the patients was 32.5(9～55) years.Of the 35 patients,26 cases were acute non-lymphocytic leukemia(ANLL) and 9 cases were acute lymphoblastic leukemia(ALL).The patients were pretreated with melphalan(140～180mg/m~2),cyclophosphamide(120mg/kg) and arabinosylcytosin(3g/m~2).Results All patients engrafted successfully.The median follow-up duration was 756(186～1950) days.The 3-year probabilities of disease-free-survival(DFS) for ANLL and ALL were(65.4%?8.9)% and(33.3?13.6)% respectively,and the probabilities of relapse were(30.6?9.2)% and(60.7?25.5)%,respectively.Conclusion To decrease relapse and increase DFS,patients with acute leukemia who have no chance for allogene haemopoietic stem cell transplantation are recommended for ABMT.

BACKGROUND: Nanotechnology has widely used in tissue engineered reconstruction in recent years. Most reports are concerning carbon nanomaterials in bone reparation, but the study of peripheral nerve regeneration is poorly understood.OBJECTIVE: To improve the physical, chemical and biological properties of chitosan/collagen composite nerve conduit with functionalized carbon nanotubes, in addition, to investigate the therapeutic effect of this novel material.DESIGN, TIME AND SETTING: The same body controlled experiment of animals was performed at the Tissue Engineering Laboratory and The Key Laboratory of Thin Film and Microfabrication Technology, Shanghai Jiao Tong University from February 2005 to November 2006.MATERIALS: The carbon nanotubes were mixed with 2% chitosan solution, coated on the die to prepare chitosan/collagen composite nerve conduit with functionalized carbon nanotubes. The chitosan/collagen tubes were served as controls.METHODS: A total of 80 male adult-rats were prepared a 4 mm accessory nerve defects models, and repaired by nerve conduit in the experimental material and control material groups. In the auto nerve grafts group, the removed nerve was connected to the broken end. In the blank control group, there was no other treatment except removing 2 mm nerves. The left sides were served as experimental sides and the right sides as within-subject controls.MAIN OUTCOME MEASURES: The repairing outcomes were measured by electrophysiological, myophysiological, and histological measurements.RESULTS: The accessory nerve defects were repaired in a rat model using carbon nanotubes in chitosan/collagen-based composite nerve conduit. As time passed after the surgery, good results of the electrophysiological, myophysiological and histological measurements were achieved, which were similar or superior to those of the nerve autografts.CONCLUSION: The carbon nanotubes in chitosan/collagen-based composite can be an ideal candidate for peripheral nerve regeneration.

Objective:To investigate the pathological subtypes and clinicopathological characteristics of the non-squamous immunophenotype nasopharyngeal carcinoma (NSNPC).Methods:The clinicopathological features of the non-squamous immunophenotype nasopharyngeal carcinoma diagnosed between 2011 and 2019 at the First Affiliated Hospital of Zhengzhou University were analyzed using hematoxylin and eosin staining, immunohistochemistry, in situ hybridization, transmission electron microscopy and PCR gene rearrangement. Follow-up data were also collected.Results:There were 14 males and 9 females with a median age of 46 years (ranging from 16 to 76 years) with an average age of 45 years. Microscopically, patterns were similar to the classic nasopharyngeal carcinoma. Immunohistochemistry showed that most NSNPC cases expressed low molecular weight keratin (CK8/18, CK8 and CKL) and expressed pathway proteins in a low level (EGFR, PI3K, p-AKT and p-mTOR), which had significant difference from classic nasopharyngeal carcinoma group ( P<0.05). Other proteins including CK5/6, CKpan, CK7, Syn, CD56, CgA, SOX-10, AKT, mTOR, Notch, STAT3 and p-STAT3 showed no statistical difference between the two groups. Pathogen detection showed that EBER was positive (18/23, 78.3%) and HPV positive(2/23, 8.7%)which were HPV35 and HPV38. The cancer suppressor gene BLU was highly expressed in NSNPC; RASSF1 and Rbms3 were less expressed in NSNPC, in line with classic NPC. As a whole, NSNPC was characterized by ultrastructures of low-differentiated squamous cell carcinoma. Compared with classic nasopharyngeal carcinoma, NSNPC had a lower recurrence rate and earlier clinical stage( P<0.05),but there was no significant correlation with age, sex, distant metastasis and death ( P>0.05). Conclusions:The histological morphology, etiology and gene changes of NSNPC are similar to those of classical nasopharyngeal carcinoma and ultrastructural findings show that NSNPC still belongs to undifferentiated type in non-keratinized squamous cell carcinoma. The malignant degree of NSNPC is low and the prognosis is good.

Objective To explore the effective therapeutic methods for thin endometrium(TE)and recovery of reproductive function of uterine.Methods Menstrual days,the Pictorial Blood Loss Assessment Chart(PBAC)score for menstrual volume,and ultrasound indicators before and after modified hysteroscopic adhesiolysis in 48 patients with TE were retrospectively analyzed.Results The average postoperative menstrual period of 48 patients was(5.60±1.40)days,which was significantly longer than(4.30±1.20)days before operation(P＜0.05);the postoperative PBAC score for men-strual volume was(55.60±6.20)points,which was significantly higher than(21.40±5.60)points before operation(P＜0.05);there were no significant differences in the mean resistance index(RI)and pulse index(PI)of bilateral uterine arteries before and after surgery(P＞0.05);the post-operative endometrial thickness and the endometrial volume were(9.10±1.10)mm and(4.68± 0.81)cm3,which were significantly higher than(4.30±1.20)mm and(3.21±0.31)cm3 before operation(P＜0.05);the postoperative RI value and PI value of the endometrium were(0.51± 0.13)and(0.77±0.26),which were significantly lower than(0.59±0.07)and(0.91±0.18)before operation(P＜0.05).The pregnancy rate of 48 patients was 60.4％.The volume and thick-ness of the endometrium were positively significantly correlated with pregnancy(P＜0.05),while the RI and PI values of the endometrium were negatively significantly correlated with pregnancy(P＜0.05).Conclusion Changing electric current cutting to"cold needle"physical and mechanical separation of scar adhesions can effectively repair scar adhesions in the uterine cavity,facilitate postoperative reconstruction of endometrial blood flow,improve uterine receptivity of TE patients,and restore uterine reproductive function.

Objective To explore the effective therapeutic methods for thin endometrium(TE)and recovery of reproductive function of uterine.Methods Menstrual days,the Pictorial Blood Loss Assessment Chart(PBAC)score for menstrual volume,and ultrasound indicators before and after modified hysteroscopic adhesiolysis in 48 patients with TE were retrospectively analyzed.Results The average postoperative menstrual period of 48 patients was(5.60±1.40)days,which was significantly longer than(4.30±1.20)days before operation(P＜0.05);the postoperative PBAC score for men-strual volume was(55.60±6.20)points,which was significantly higher than(21.40±5.60)points before operation(P＜0.05);there were no significant differences in the mean resistance index(RI)and pulse index(PI)of bilateral uterine arteries before and after surgery(P＞0.05);the post-operative endometrial thickness and the endometrial volume were(9.10±1.10)mm and(4.68± 0.81)cm3,which were significantly higher than(4.30±1.20)mm and(3.21±0.31)cm3 before operation(P＜0.05);the postoperative RI value and PI value of the endometrium were(0.51± 0.13)and(0.77±0.26),which were significantly lower than(0.59±0.07)and(0.91±0.18)before operation(P＜0.05).The pregnancy rate of 48 patients was 60.4％.The volume and thick-ness of the endometrium were positively significantly correlated with pregnancy(P＜0.05),while the RI and PI values of the endometrium were negatively significantly correlated with pregnancy(P＜0.05).Conclusion Changing electric current cutting to"cold needle"physical and mechanical separation of scar adhesions can effectively repair scar adhesions in the uterine cavity,facilitate postoperative reconstruction of endometrial blood flow,improve uterine receptivity of TE patients,and restore uterine reproductive function.

Hydatid worms, hosted by humans and animals, impose serious human health risk and cause significant livestock production loss. To better understand the disease infection status in Xinjiang, China, we investigated the disease epidemics in 4 livestock animals, i.e., cattle, sheep (both sheep and goat), camels, and horses, slaughtered at the abattoirs in Urumqi, Yining, Tacheng, and Altay areas. The results showed that the animals were infected at different rates, in the order of sheep (9.8%), cattle (8.4%), camels (6.8%), and horses (4.3%). The infection rates were found to be different between the abattoirs in various regions even for the same animals. For sheep, the rates increased significantly as the animals grew older. It was 1.9% before 1 year of age and increased to 8.2% in the age of 1-2 years, and further increased to 12.3% when the animals were 3-4 years old, and reached 17.2% when they were 5-6 year old. Sheep older than 6 years had an infection rate of 19.5%. This study demonstrates that the 4 livestock animals in the pastoral areas in Xinjiang were infected by the parasites to various extend. This study is the first systematic investigation of the hydatid worms in various livestock animals in Xinjiang, China, which provides epidemiological information about the infection of hydatid worms in livestock, and is valuable in developing strategies for prevention and control of the hydatid disease.
Age Factors ; Animals ; China/epidemiology ; Echinococcosis/epidemiology/*veterinary ; *Livestock ; Prevalence

Chinese dental doctoral education has developed multiple lengths of schooling, including eight-year programme, five-year direct doctoral programme, five-year master-doctor combined programme and three-year doctoral programme. The review summarizes the development of the lengths of schooling of Chinese dental doctoral education, compares and analyzes different modes of education and their outcomes. In order to further construct the Chinese dental doctoral education, it's strongly suggested to set a medical-scientist training programme, to promote the double-track system and to deepen the collaborative reform of medical and educational cooperation to train more outstanding talents for the future development of stomatology in China.

Bone tissue engineering has emerged as a promising alternative therapy for patients who suffer bone fractures or defects caused by trauma, congenital diseases or tumours. However, the reconstruction of bone defects combined with osteoporosis remains a great challenge for clinicians and researchers. Based on our previous study, Ca-Si-based bioceramics (MSCs) showed enhanced bone formation capabilities under normal conditions, and strontium was demonstrated to be therapeutic in promoting bone quality in osteoporosis patients. Therefore, in the present study, we attempted to enlarge the application range of MSCs with Sr incorporation in an osteoporotic bone regeneration model to evaluate whether Sr could assist in regeneration outcomes. In vitro readout suggested that Sr-incorporated MSC scaffolds could enhance the expression level of osteogenic and angiogenic markers of osteoporotic bone mesenchymal stem cells (OVX BMSCs). Animal experiments showed a larger new bone area; in particular, there was a tendency for blood vessel formation to be enhanced in the Sr-MSC scaffold group, showing its positive osteogenic capacity in bone regeneration. This study systematically illustrated the effective delivery of a low-cost therapeutic Sr agent in an osteoporotic model and provided new insight into the treatment of bone defects in osteoporosis patients.

In the original publication of the article the keywords are incorrectly online published. The correct keywords should read as α-Conotoxin; Nicotinc acetylcholine receptor; Acetylcholine binding protein; X-ray crystallography".

The α3* nAChRs, which are considered to be promising drug targets for problems such as pain, addiction, cardiovascular function, cognitive disorders etc., are found throughout the central and peripheral nervous system. The α-conotoxin (α-CTx) LvIA has been identified as the most selective inhibitor of α3β2 nAChRs known to date, and it can distinguish the α3β2 nAChR subtype from the α6/α3β2β3 and α3β4 nAChR subtypes. However, the mechanism of its selectivity towards α3β2, α6/α3β2β3, and α3β4 nAChRs remains elusive. Here we report the co-crystal structure of LvIA in complex with Aplysia californica acetylcholine binding protein (Ac-AChBP) at a resolution of 3.4 Å. Based on the structure of this complex, together with homology modeling based on other nAChR subtypes and binding affinity assays, we conclude that Asp-11 of LvIA plays an important role in the selectivity of LvIA towards α3β2 and α3/α6β2β3 nAChRs by making a salt bridge with Lys-155 of the rat α3 subunit. Asn-9 lies within a hydrophobic pocket that is formed by Met-36, Thr-59, and Phe-119 of the rat β2 subunit in the α3β2 nAChR model, revealing the reason for its more potent selectivity towards the α3β2 nAChR subtype. These results provide molecular insights that can be used to design ligands that selectively target α3β2 nAChRs, with significant implications for the design of new therapeutic α-CTxs.
Animals ; Aplysia ; Binding Sites ; Conotoxins ; chemistry ; Crystallography, X-Ray ; Humans ; Protein Structure, Quaternary ; Receptors, Nicotinic ; chemistry