Clinical characteristics and comprehensive treatment of patients with cleidocranial dysplasia / 中华口腔医学杂志

Objective: To summarize the clinical characteristics of patients with cleidocranial dysplasia (CCD) and analyze their treatment methods. Methods: From January 2000 to December 2020, patients with CCD who completed comprehensive treatment in the Department of Orthodontics and the First Dental Clinic, School and Hospital of Stomatology, China Medical University were retrospectively analyzed. A total of 14 CCD patients [7 males and 7 females, aged (16.1±4.5) years] were collected. There were 153 impacted permanent teeth in this study. In addition to the teeth that needed to be extracted due to special conditions, 147 impacted teeth were pulled into the dentition using closed traction. Patients were divided into adolescent group (≥12 years and<18 years, 10 patients) and adult group (≥18 years, 4 patients). Failure rate of traction was compared between the two groups. Factors affecting the success rate of closed traction such as vertical position of teeth (high, middle and low) and horizontal position of the teeth (palatal, median and buccal) were analyzed. Results: The incidence of maxillary impacted teeth [69.3% (97/140)] was higher than that of mandibular impacted teeth [40% (56/140)]. The difference was statistically significant (χ2=24.22, P<0.001). The supernumerary teeth were mainly located in the premolar area 61.4% (21/44), and most of them were in the palatal region of the permanent teeth 95.5% (42/44). They were generally located at the same height or the occlusal side of the corresponding permanent teeth. The success rate of closed traction was 93.9% (138/147). The success rate in the adolescent group [98.2% (108/110)] was higher than that in the adult group [81.1% (30/37)], and the difference was significant (χ2=14.09, P<0.05). Failure after closed traction of 9 teeth was found totally, including 7 second premolars. The success rate of traction in impacted second premolars at different vertical (χ2=11.44, P<0.05) and horizontal (χ2=9.71, P<0.05) positions in alveolar bone was different significantlly. The success rates of the second premolars were high (15/16), middle (12/13), low (2/7), and lingual palatine (10/17), median (19/19), lip-buccal (0/0), respectively. Conclusions: The closed traction of impacted teeth in patients with CCD was effective, and the age was the main variable affecting the outcome. The success rate of traction in impacted second premolars located in low position vertically or in palatal position was low, which required close observation during treatment.

Clinical features of invasive pulmonary fungal infection secondary to malignant blood diseases / 中国医学科学院学报

<p><b>OBJECTIVE</b>To summarize the clinical features of invasive pulmonary fungal infection (IPFI) secondary to malignant blood diseases (MBD).</p><p><b>METHODS</b>We retrospectively analyzed the clinical data of 52 patients with IPFI secondary to MBD admitted to Peking Union Medical College Hospital from January 1995 to December 2008.</p><p><b>RESULTS</b>The incidences of IPFI secondary to acute myeloid leukemia (AML), acute lymphoblastic leukemia (ALL), non-Hodgkin's lymphoma (NHL), and aplastic anemia (AA) were 4.6%, 3.2%, 2.8%, and 2.5%, respectively. In patients with IPFI secondary to AML, 88.5% (23/26) of the patients suffered from the infections during the non-remission (NR) period (including relapse), and 11.5% (3/26) in the complete-remission (CR) period. In all the patients with IPFI secondary to malignant blood diseases, 86.5% (45/52) of MBD were neutropenic or agranulocytic, and 67.3% (35/52) had been treated with broad-spectrum antibiotics for more than 96 hours before anti-fungal therapy. The total mortality after anti-fungal therapy was 13.7% (7/51). More than half of patients with fluconazole or itraconazole as the first-line therapy had to switch to other medicines because of poor infection control.</p><p><b>CONCLUSIONS</b>IPFI secondary to MBD is most common in AML patients. Patients with NR of AML, neutropenia or agranulocytosis, and long-term broad-spectrum antibiotics usage are susceptible to IPFI. Fluconazole and itraconazole have low efficacy, and other more potent anti-fungal medicines should be considered.</p>

Advances in thalidomide therapy for idiopathic myelofibrosis / 中国医学科学院学报

Idiopathic myelofibrosis a Philadelphia-negative chronic myeloproliferative disorder. Potentially curative therapies, such as stem-cell transplantation, are reserved only for a minority of patients. Currently palliative therapies such as androgen and hydroxycarbamide are commonly used but with poor results. Thalidomide has anti-angiogenic effect and also can inhibit cytokines, and therefore plays a certain role in the treatment of a subset of idiopathic myelofibrosis.

Surveillance and pathogenic analysis on non-typhoidal Salmonella in Guangdong province, 2007 / 中华流行病学杂志

Objective To understand non-typhoid Salmonella in diarrhea patients from Guangdong province in order to timely discover the outbreaks caused by them as well as to grasp the serotypes, antibiotic resistance and pulse-field gel electrophoresis (PFGE) types of those strains isolated from this surveillance program. Methods Salmonella strains from diarrhea patients were detected and all the positive strains were tested by serum agglutination, antibiotic susceptibility and PFGE. Results 71 nontyphoid Salmonella strains were isolated from 1128 stoop samples, with a positive rate of 6.29 %. All the strains were divided into 29 serotypes, with Salmonella serotype enteritidis and typhimurium showing the most common serotypes. Most of the strains were sensitive to cephalosporins and quinolones. The antibiotic resistance rates of S. typhimurium were higher than S. enteritidis and S. stanley. Other than S. enteritidis, all the serotype strains did not have the same type of PFGE. 17 S. enteritidis strains digested by Xba Ⅰ were divided to 8 PFGE types while the PFGE 4 type appeared the most common one. 12 S. enteritidis strains were typed again by Sfi Ⅰ and Not Ⅰ , and there were still 3 groups of strains showing the same PFGE pattern. Conclusion Most of the infection caused by non-typhoidal Salmonella was sporadic in Guangdong province in 2007. Cephalosporins and quinolones seemed the best in curing the infection of non-typhoidal Salmonella at the clinics.

Copper treatment alters the barrier functions of human intestinal Caco-2 cells / 中华预防医学杂志

<p><b>OBJECTIVE</b>To investigate the effects of copper on permeability and P-glycoprotein (P-gp) of Caco-2 cell monolayers.</p><p><b>METHODS</b>The differentiated Caco-2 cell model was used in this study. Permeability of cell monolayers was reflected by monitoring transepithelial electrical resistance (TEER); distribution of tight junctional protein ZO-1 was measured by immunofluorescent staining; F actin was measured by fluorescence staining; and Activity of P-gp was reflected by changes of transcellular transport and accumulation of Rho-123 in Caco-2 cells.</p><p><b>RESULTS</b>Apical treatment with copper (30 - 100 micromol/L, Hanks' buffered salt solution, up to 3 hours) induced a time- and concentration-dependent increase in permeability reflected by progressive decrease of TEER of Caco-2 cell monolayers, accompanied by deorganization of F actin, but without significant effects on tight junctional protein ZO-1; at a dose without any adverse effects on viability and permeability of Caco-2 monolayers, copper treatment (300 micromol/L, complete medium, 24 hours) decreased Papp(BL-->AP) from 7.37 +/- 0.20 x 10(-6) cm/s (controls) to (6.43 +/- 0.27) x 10(-6) cm/s, the increased Papp(AP-->BL) from (1.23 +/- 0.05) x 10(-7) cm/s (controls) to (3.41 +/- 0.08) x 10(-7) cm/s, and enhanced the intracellular Rho-123 from (0.31 +/- 0.01) nmol/filter (controls) to (0.50 +/- 0.03) nmol/filter.</p><p><b>CONCLUSION</b>Copper might alter the barrier functions of Caco-2 cells through increasing the permeability and inhibiting P-gp of Caco-2 cells.</p>

Analysis of caspases activity of hematopoietic progenitor cells and its significance in myelodysplastic syndromes / 中华血液学杂志

<p><b>OBJECTIVE</b>To investigate the changes of apoptosis and the activity of caspases 3 and 9 in bone marrow hematopoietic progenitor cells in myelodysplastic syndromes (MDS).</p><p><b>METHODS</b>Bone marrow hematopoietic progenitor cells (including both CD(34)(+) and CD(34)(-) cells) were collected by negative selection in 34 patients with MDS. Apoptosis was measured with Annexin V assay and activities of caspases 3 and 9 by spectrophotometer.</p><p><b>RESULTS</b>1. Apoptosis was significantly increased in MDS-RA (39.5%, P < 0.01) and MDS-RAEB (31.0%, P < 0.05), but was not different statistically in MDS-RAEBt/AML (18.8%) compared with that of control. 2. Activities of caspases 3 and 9 increased 45 and 20 fold in MDS-RA, increased 14 and 2 fold in MDS-RAEB, respectively and was not increased in MDS-RAEBt/AML compared with that of control. 3. Apoptosis and activities of caspases 3 and 9 reduced in 3 cases of MDS-RAEB group who progressed into AML.</p><p><b>CONCLUSION</b>Increased activities of caspases 3 and 9 may be one of causes of excessive apoptosis in MDS. With progress to AML, activities of caspases 3 and 9 and apoptosis reduced. Reduced activity of caspase 9 may result in apoptosis "escape" and progression into AML.</p>