Methylmercury is a potent toxicant, bioaccumulated and concentrated through the aquatic food chain, placing risks to human on the top of the chain. Based on the researches of adverse health effects exposed to methylmercury, several health risk assessment indexes (reference dose, provisional tolerable weekly intake, occupational mercury exposure assessment indexes ) and experiences on methylmercury exposure prevention (mainly on fish consumption) from the developed countries are presented in this paper.

The dissolution rates of the cephalexin tablets made by five t actories in China were determined with rotating basket method. The dissolution constants Ki were calculated using single exponential method. The analysis of variance was carried out for Ki. The results showed that constants Ki of products from different factories were significantly different (p

Magnesium deficiency is common in patients with type 2 diabetes mellitus(T2DM);meanwhile,it may in crease the risk of the occurrence and development of T2DM.Adequate supplementation of magnesium may be helpful for the prevention and treatment of T2DM.

Objective To investigate the effects of mouse nerve growth factor on amikacin (AK)-induced ototoxicity in guinea pigs .Methods 45 guinea pigs were randomly divided into three groups with 15 guinea pigs in each group .The control group received no drug treatment ,the poisoning group received an intraperitoneal injection of AK (400 mg · kg -1 · d-1 ) for 10 days ,and the treatment group received an intraperitoneal injection of AK (400 mg · kg -1 · d-1 ) for 10 days and an intramuscular injection of NGF (1 500 AU · kg -1 · d-1 ) for 14 consecutive days .Auditory brainstem responses were tested on the day before administration ,the 10th day and 20th day after administration .All the guinea pigs were sacrificed when the last ABR test was finished on the 20th day whose Corti organs were observed as well .Results The ABR thresholds of each group showed no significant difference before administration .The ABR threshold of the treatment group was lower than that of the poisoning group .With light microscopy ,the hair cells with normal morphology were observed in the control group .However ,there was an ex-tensive loss of outer hair cell in the poisoning group .For the treatment group ,the miss rate of hair cell was lower compared with the poisoning group .Conclusion Our data shows that NGF has played a protective role on amikacin-induced ototoxicity .

OBJECTIVE:To evaluate the quality of sampling drugs of Hubei province,and to provide reference for drug enter-prises and supervision department. METHODS:The data obtained by Hubei Institute for Food and Drug Control about provincial drug sampling and testing from 2013 to 2015 were summarized,the overall quality and unqualified items were statistically analyzed according to current standard. RESULTS & CONCLUSIONS:The number of total sampling batches was 7721 and that of the un-qualified batches was 333 (4.3%) during 2013-2015. Most of the unqualified samples came from distribution units (2.8%-9.0%) and medical institutions (5.2% -11.7%). Among all sample types, the herbal medicine has the highest unqualified rate (12.1%-37.4%),with the largest number of unqualified items(content determination,supplement inspection item,property,resid-ual amount of sulfur dioxide,ash content). The quality of pharmaceutical preparations is relatively stable,and the unqualified items correlated with drug types and dosage forms. The current issues of provincial drug sampling and testing are the variety of standard levels,unreasonable sampling resource allocation and the low level of the industry. Supervision department is proposed to readjust drug standard,reasonably plan sampling and testing process and strengthen production source controlling.

Objective To investigate the effect of periodontal basic treatment combined with coenzyme Q10 on cytokines in serum and gingival crevicular fluid of periodontitis with coronary heart disease.Methods A total of 68 patients with periodontitis with coronary heart disease were collected and randomly divided into 2 groups with 34 cases in each group.Patients in the control group were treated by periodontal basic treatment, patients in the experimental group were treated on the basis of the control group with coenzyme Q10 injection, continuous treatment for 2 weeks, the inflammatory factors levels in serum and gingival crevicular fluid were detected and the periodontal indexes and clinical efficacy were observed.Results Compared with before treatment, the TNF-α, IL-1β, IL-6 and IL-8 levels of serum and gingival crevicular fluid were decreased (P<0.05), the plaque index (PLI), sulcus bleeding index (SBI), periodontal depth (PD) and clinical attachment loss (CAL) were decreased (P<0.05);compared with the control group, the TNF-α, IL-1β, IL-6 and IL-8 levels in serum and gingival crevicular fluid of the experimental group were lower ( P<0.05 ) , PLI, SBI and PD periodontal indexes were lower (P<0.05), the clinical curative effect was higher (P<0.05).Conclusion Coenzyme Q10 injection in the treatment of patients of periodontitis with coronary heart disease could significantly improve the periodontal inflammation, and reduce the IL-6 and TNF-αlevels in serum and gingival crevicular fluid.

BACKGROUND:Studies have found that Notch pathway and Bmi-1 gene both have the ability to regulate stem cel self-renew. Functional dysfunction of the both may have a great relationship with tumorigenesis. OBJECTIVE:To investigate the expression and clinical significance of Notch1 and Bmi-1 protein in lung tissue. METHODS:Eighty-seven lung cancer tissue samples (lung cancer group) and forty pathologicaly confirmed normal lung tissue samples (normal group) were obtained from related surgeries and included as research objects. The protein expression of Notch1 and Bmi-1 in specimens of these two groups was measured by immunohistochemistry SP method. The relationship between Notch1 and Bmi-1 protein expression and clinicopathological features of lung cancer patients was analyzed. RESULTS AND CONCLUSION: The positive rate of Notch1, Bmi-1 protein expression was respectively 61% and 47%, which was significantly higher in the lung cancer group than that in the normal group (P < 0.05). In the lung cancer group, Notch1 protein expression was significantly positively correlated with Bmi-1 protein expression (r=0.567,P < 0.001). There were no significant differences in Notch1 and Bmi-1 protein expression rates between different genders and different pathological types of patients (P < 0.05). The Notch1 and Bmi-1 protein positive expression rates in poorly-differentiated, TNM stage III-IV lung cancer patients with lymph node metastasis were significantly higher than those in wel- and moderately-differentiated, TNM stage I-II lung cancer patients without lymph node metastasis (P < 0.05). These results demonstrate that Notch1 and Bmi-1 protein may have certain relationship with the occurrence and development of lung cancer.

Objective To study the treatment of elderly depression and anxiety in the treatment of depression and anxiety. Methods 76 cases of senile depression and anxiety co-morbidity were selected from our hospital from January 2016 to January 2017, and were randomly divided into control group and experimental group, with 38 cases in each group. The patients in the control group were treated with escitalopram, and the patients in the experimental group were treated with ascitalopram. The treatment time for both groups was two months. Comparative analysis was made on the clinical indicators of the experimental group and the control group. Results After treatment, the score of HAMD score and HAMA score in the experimental group was significantly lower than that in the control group, and the score of the experimental group was significantly lower than that in the control group, the differences were statistically significant (P< 0.05). The effective treatment efficiency of the patients in the experimental group was 86.84 ％ compared with the control group (73.68％), the differences were statistically significant (P< 0.05). There were 9 cases and 10 cases of adverse reactions between the experimental group and the control group, but there was no significant difference in the incidence of adverse reactions. Conclusion The liver capsule joint resolve depression escitalopram citalopram treatment of senile depression and anxiety comorbidities better clinical effect, can significantly improve the condition, improve the treatment efficiency, further promotion and application of clinical significance.

BACKGROUND:Due to quantity and quality deficiencies, chondrocytes from microtia are difficult to act as seed cells to construct an ear cartilage scaffold with the normal human auricle size. OBJECTIVE: To test the hypothesis that auricular chondrocytes from microtia can promote chondrogenic differentiation and chondrogenesis of human adipose tissue-derived stem cells (ADSCs) at non-chondrogensis sitein vivo, which is the preparatory work for preparation of human tissue-engineered auricle cartilage scaffold. METHODS: Human ADSCs at passage 3 and auricular chondrocytes at passage 2 were mixed at a ratio of 7:3 and 5.0×1010/L mixed cells were suspended in 0.2 mL of 30% Pluronic F-127, and then the mixture was injected subcutaneously into Balb/c nude mice as experimental group. Auricular chondrocytes or ADSCs at the concentration of 5.0×1010/L were mixed with 0.2 mL of Pluronic F-127 and injected respectively as positive and negative control groups. 1.5×1010/L auricular chondrocytes were mixed and injected as low-concentration chondrocyte control group. All specimens were collected at the 8th week post-injection. Newborn tissues in nude mice were taken out for morphological examination, wet weight measurement, determination of glycosaminoglycans, histological and immunohistochemical staining. RESULTS AND CONCLUSION:The wet weight of specimens in the experimental group was over 80% of that in the positive control group, and the wet weight of specimens in the low-concentration chondrocyte control group was less than 30% of that in the positive control group. The average wet weight and glycosaminoglycan content were significantly higher in the experimental and positive control group than in the negative control and low-concentration chondrocyte control groups (P < 0.05). In all the groups except for the negative control group, mature cartilage lacunas could be observed by histological staining and collagen type Ⅱ could be detected for expression by immunohistochemistry to different extents. In the low concentration chondrocyte control group, cartilage lacunas were incompact and inhomogeneous, and the extracellular matrix was slightly stained. In the negative control group, mature cartilage lacunae and collagen type Ⅱ could not be detective. To conclude, auricular chondrocytes from microtia can promote chondrogenic differentiation and chondrogenesis of ADSCs at the non-chondrogenesis sitein vivo.

Atherosclerosis is a multifactorial disease for which the molecular etiology of many of the risk factors is still unknown.Reactive oxygen species(ROS) mediate various signaling pathways that underlie vascular inflammation in atherogenesis: from the initiation of fatty streak development through lesion progress to ultimate plaque rupture.The mitochondrial respiratory chain is the major source of reactive oxygen species as byproducts of normal cell respiration.Mitochondria may also be important target for reactive oxygen species,which may lead to mitochondrial dysfunction.Moreover,in patients with mitochondrial diseases,vascular complications are commonly observed at an early age,often in the absence of traditional risk factors for atherosclerosis.The aim of this review is to summarize the data linking mitochondrial dysfunction to the pathogenesis of atherosclerosis.