Objective To determine the difference of microvessel density(MVD) in each layer and region of abdominal flap. MethodsFlaps were obtained from 60 patients with abdominal operations,10 in each of the regions from I to VI.The vascular endothelial cells were marked with CD34 by immunohistochemistry,and the MVD in each region and layer of the abdominal flaps was determined.Results The vascular net of abdominal flap was divided into five layers: papillary layer of corium,papillary underlayer of corium,papillary deep layer of corium,superficial fascia and deep fascia.The mean MVD of the five layers were 17.80?1.68,9.12?1.84,27.91?2.44,37.18?6.55 and 46.91?7.02,respectively,with significant differences among them(P0.05).Conclusion Anatomic factors may be responsible for the survival of large abdominal flaps.Either of the direct and retrograde motion is feasible in the transplantation.

Objective　To investigate the epidemic situat ion of the dental fluorosis among the people in Tianjin area.Methods　With the method of random sampling we investigated epidemic situation of the dental fluorosis among the people aged 12 to 15 in Tianjin area.Results　The minimum patient's rate for this disease among those aged 12 to 15 is 32.11 percent while the maximum is 78.09 percent.The l owest dental fluorosis index is 0.851 and the highest is 1.923.The patient's rate and the index are both higher than the average rate and index of the whole cou ntry.Conclusions　Tianjin is one of the areas where the dental fluorosise epidemic mostly occurs.

Female ; Humans ; Methotrexate ; Pregnancy ; Pregnancy, Ectopic

Brain ; Dyspepsia ; therapy ; Gastritis ; Humans ; Medicine, Chinese Traditional ; Research Design ; Syndrome

BACKGROUND:Neural stem cels have the potential to differentiate into neurons and glial cels to replace the injured brain cels, so as to achieve the purpose of repairing nerve injury.
OBJECTIVE:To observe the neuronal differentiation ability of cel subsets with stem cel characteristics in the adult rat meningeal tissues.
METHODS:Under anesthesia, the meningeal tissues were obtained from adult Sprague-Dawley rats to make cel suspension folowed by inoculation and subculture. Then, the Nestin immunofluorescence staining was performed. The third generation cels were culturedin vitro with complete culture medium containing trichostatin A. After 7 days of induction, western blot assay was used to detect the expression of NF-200 and BM88 proteins in neural cels.
RESULTS AND CONCLUSION: At 24 hours of culture, some spherical cels were suspended and some cels adherent. In addition, some spherical cels scattered gradualy formed the clone spheres, and the growth rate decreased with the increasing volume. The positive expression of Nestin was detected by immunocytochemistry staining, and the cel nucleus was stained blue by Hoechst staining. BM88 and NF-200 proteins were al expressed at 7 days of neural induction. These findings indicate that the cel subsets with stem cel characteristics in the adult rat meningeal tissues can differentiate into neurons after in vitro induction.

[Objective]Osteoporotic vertebral compression fractures(OVCFs)are commonly multiple fractures and this study is aimed to explore how to determine the symptomatical fractured vertebrae as well as the pitfalls in treating OVCFs using percutaneous vertebroplasty(PVP).[Method]Forty-eight OVCFs patients(78 vertebrae)undergoing PVP were retrospectively analyzed.All the patients had anteroposterior and lateral plain X-rays as well as T1W1,T2W1 and fat-compressing(STIR)MR images preoperatively.The symptomatical fractured vertebrae were determined with combination of regional pain、X-rays and MR images.Of all the patients,36 were injected unilaterally while 12 were injected bilaterally.The mean injected volume of PMMA were 3-7 ml.[Result]The back pain of all the patients were relieved to different degrees postoperatively.The back pain completely disappeared in 30 patients while the left back pain was not improved though the right back pain disappeared in 2 patients who were injected via right approach.The back pain almost disappeared but the bilateral rib pain was not improved in 1 patient with T8 vertebral fracture.No severe complications including pulmonary emboli occurred.[Conclusion]The symptomatical fractured vertebrae should be determined comprehensively not only based on preoperative X-rays but also on the MR images,especially fat-compressing MR images.Only when the fractured vertebrae demonstrate low intensity on T1W1 MR image and high-intensity on T2W1 or fat-compressing MR image can we consider them new fractures.Otherwhise,the fractured vertebrae are considered old fractures and they see no necessity to be injected.The injection should reach the most severely fractured part and if necessary the bilateral approaches are considered.PMMA should be injected after the bone cements are solid enough so as not to develop complications such as pulmonary emboli.

Objective To explore the immune function injury and its mechanism in drug abuser.Methods The immune function changes in 50 drug abusers were compared with normal healthy populations by detection of the indexes of subgroups of Th cells, transformation rate of lymphocytes,IgA,IgM,IgG,IgE,compliment C3,C4,IL 1, IL 2,IL 6 TNF and NO.Result In peripheral blood the percentage of Th1 cell, transformation rate of lymphocyte, IgA, IgM, IgG, IgE content, compliment C4,C4, IL 1, IL 2,IL 6,and TNF levels were significantly lower than normal(P< 0.01).The value of Th1/Th2 was lower than normal as well(P< 0.05).NO content was significantly higher than normal(P< 0.001).Conclusion The mechanism of immune function injury in drug abuser might be correlative to direct injury of drugs and their inhibition effect on the thymus hypothalamus hypophysis adrenal axis.

Objective To review the research advances in molecular biology of vascular restenosis.Methods The literatures about molecular biology of vascular restenosis were reviewed.Results Current transgenic ways had some advantages and disadvantages. Gene therapy with HSV tk, Rb,p21,p27,p53,c myc, c myb, vascular endothelial growth factor,bFGF,platelet derived growth facfor,nuclear factor ?B and so on inhibited vascular restenosis.Conclusion A better transgenic system and gene combination therapy will be effective to treat vascular restenosis.

Objective To observe and scale knee joint space of the patients who suffered adults' Kaschin-Beck disease (KBD) in Shangzhi City of Heilongjiang Province in order to acquire basic knowledge for upcoming intervention trial. Methods Clinical test was proceeded in adults aged above 40 in Guanghui Village of Shangzhi City in 2007. In typical patients, bilateral knee X-ray was taken and knee joint space was scaled. Three points were chosen on inner and outer epicondyle of each knee and results were recorded. Results There were 307 peoples over the age of 40 in the village. Two hundred eighty-two accepted clinical test, in a rate of 91.9%. Eighty out of 282 suffered KBD, accounting for 28.4%. When the patients' condition became more serious, measurements from flank, middle, inside points on outer epicondyle of joint space presented a narrowing trend [degree Ⅰ: (5.85±0.17), (4.84±0.17), (4.36±0.18)mm; degree Ⅱ: (5.11±0.43), (4.24±0.34), (3.48±0.28)nun; degree Ⅲ: (3.59± 0.78), (3.10±0.56), (2.14±0.62)mm; Fflank,middle,inside= 6.547,5.372,10.302, all P < 0.05], but those on inner epicondyle of joint space did not[degree Ⅰ:(3.66±0.17), (3.47±0.17), (3.73±0.18)mm; degree Ⅱ:(3.55± 0.34), (3.54±0.29), (4.35±0.35)mm; degree Ⅲ: (3.19±0.72), (3.92±0.66), (4.51±0.72)ram; Finside,middle,flank= 0.351,0.356,1.883, all P > 0.05]. Joint space < 5.00 mm were found in 618, among which 363 were measured on inner epieondyle, obviously greater than those measured on outer epicondyle of joint space(255), the difference being statistically signifieant(χ2=9.59, P<0.05). Conclusions Adult cases of KBD occur in Guanghui Village. Knee joint space of adult patients narrows obviously, the more serious, the narrower, especially occurring more obviously on outer epicondyle, but frequently on inner epicondyle.

Objective To determine the clinical value of contrast enhanced MRI in differentiating benign and malignant pancreatic endocrine tumors (PNETs).Methods MRI findings on 13 cases who were pathologically diagnosed as PNETs were retrospectively analyzed , including the tumor volume , border , MRI signal and adjacent organ involvement of Grade 1~3 tumors, and the sensitivity, specificity and accuracy of MRI for diagnosing PNETs were calculated .Results A total of 18 tumors were detected , including 12 benign (Grade 1) and 6 malignant (Grade 2~3) tumors.Eight Grade 1 tumors′(66.7%) maximal diameters were≤2 cm, while 100%(6 /6) Grade 2 ~3 tumors′maximal diameters were ≥2 cm.All of Grade 1 tumors (100%) had clear boundary , while 50%(2/4) Grade 2 and 100%(2/2) Grade 3 tumors had unclear boundary.Ten Grade 1 tumors (83.3%) had intratumoral homogeneous signal , while 100%(6/6) Grade 2~3 tumors had heterogeneous intratumoral signal .Two Grade 3tumors ( 100%) had organ infiltration and retroperitoneal lymph node metastasis .The sensitivity ,specificity and accuracy of MRI for differentiating benign and malignant PNETs were 833.%, 85.7%and 84.6%, respectively.Conclusi ons MRI had higher sensitivity, specificity and accuracy in differentiating benign and malignant PNETs , but it was still difficult to differentiate Grade 1 from Grade 2 tumors by MRI.Tumors size could not be considered to be a reliable indicator for differentiating benign and malignant PNETs .