Most of pigments were made of aromatics extracted from cola tar. As early as 1895, aromatics were found to be carcinogenic. In 1974, ETAD had tested 50 more kinds of aromatics and found that 22 had carcinogenic role. In 1994, Germany revised the law of articles of everyday use and clearly stipulated that aromatics were prohibited to be used in production of cloth dye. Bayer had prohibited the use of 118 kinds of pigments such as aromatics, etc. In 1997, the number of prohibited pigments rose to 141. The AATCC in America plans to use environment-protecting pigments instead of aromatic pigments. In order to keep the status of great power in export textile, India had prohibited the use of 116 kinds of pigments and built a monitoring center.Internationally, the trader should show the customer a booklet of instructions indicating that the cloth does not have any pigments, which may be carcinogenic, allergenic or have hormone disrupting characteristics.

AIM: To construct a high-level expression system of recombinant human neuronal nitric oxide synthase (hnNOS) full-length enzyme in Escherichia coli. METHODS: The coding sequence of hnNOS full-length was firstly amplified by PCR, and then ligated into the expression vector pCWori+. The recombinant plasmid was transformed into Escherichia coli BL21 for high-level expression. After having been checked with Western blot, the enzyme was used for large-scale culture and purification. Finally, the property of the enzyme was determined by spectrophotometric method. RESULTS: The constructed expression system could give a yielding of 3 mg/L initial culture. CONCLUSION: The expression system constructed is fully sufficient to express the active human neuronal nitric oxide synthase.

Objective To observe the clinical curative effect of photorejuvenation of photodamaged skin by intense pulsed light (IPL) and 755nm laser. Methods A total of 187 patients were treated with a series of five or more full-face treatments using IPL and 755nm laser alternatly. After the treatement, the patients and physicians subjectively evaluated improvement in five aspects, including color of the face, telangiectasia, pore, pigmentation, and skin texture. Results According to comprehensive evaluation of the five aspects by the patient and physicians, and as compared to the first score, significant difference was observed (P

Objective To detect the clinical factors related with liver metastasis in young patients with rectal cancer.Methods Three hundred and fifty young patients with rectal cancer were collected to set up the database.Single and multi-factor Logistic regression was applied to indicate the independent factors relating to liver metastasis.The regression equation to predict probability of liver metastasis from rectal cancer was established.Results Liver metastasis was 120 cases (34.3%).Single-factor analysis revealed that patho-organization type,pathologytype,infiltration extent,blood vessel invasion (BVI),TNM stage,operation character,the preoperative level of carcino-embryonic antigen,histology grading were related with liver metastasis.Multi-factor analysis revealed that only BVI (P=0.001),TNM stage (P=0.001),pathoorganization type (P=0.005),the preoperative level of CEA (P=0.008) and operation character (P=0.032) were independent factors to predict probability of liver metastasis.Conclusions Rectal cancer of young patients who being with BVI,advanced phase,high preoperative level of CEA,radical operation or poor differentiation degree,are apt to develop liver metastasis.They should be given further individualized intensive adjuvant treatment.

OBJECTIVE: To investigate the reason for the adhesion of vocal cord after CO2 Laser laryngeal surgery. METHOD: One hundred and nineteen patients who were untaken CO2 Laser laryngeal microsurgery. RESULT: Among 119 cases, 9 cases of bilateral vocal cord paralysis, 42 cases of vocal cord polyps and 3 cases of precancerous laryngeal lesions did not show vocal cord adhesion after CO2 Laser laryngeal microsurgery. Contrarily, one of 5 cases with laryngeal stenosis, 5 of 41 cases with laryngeal papilloma and 6 of 19 cases with laryngeal carcinoma shew the adhesion of vocal cord after CO2 Laser laryngeal microsurgery. CONCLUSION Through selecting the appropriate patient and surgery spot, processing correctly during and after surgery, using the suitable dosage of laser and reducing the heat radiation, the adhesion of vocal cord can be avoided after CO2 Laser laryngeal surgery.
Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; Female ; Humans ; Laryngeal Diseases ; etiology ; pathology ; Laryngeal Neoplasms ; surgery ; Lasers, Gas ; adverse effects ; Male ; Middle Aged ; Precancerous Conditions ; etiology ; Tissue Adhesions ; Treatment Outcome ; Vocal Cords ; pathology ; Young Adult

Objective: To investigate the clinical and histological features, diagnosis and differential diagnosis of myofibroma/myofibromatosis. Methods: The clinical data and pathology features of nine cases of myofibroma/myofibromatosis were collected from August 2011 to November 2016 in Affiliated Drum Tower Hospital, Nanjing University Medical School and Children′s Hospital of Nanjing Medical University. Immunohistochemistry(IHC), PDGFRB molecular analysis and ETV6-NTRK3 gene fusion were performed and relevant literature reviewed. Results: There were 7 males and 2 females, with age ranging from 3 days to 18 years (mean 5 years). The tumors were located in head and neck (eight cases) and trunk (one case). Clinically, the tumors presented as freely movable nodules. Microscopically, they appeared biphasic with alternating light- and dark-staining areas. The light-staining area consisted mainly of plump myoid spindle cells with eosinophilic cytoplasm arranged in nodules, short fascicles, or whorls.The dark-staining area was composed of round or polygonal cells with slightly hyperchromatic nuclei or small spindle cells arranged around a distinct hemangiopericytoma-like vascular pattern. IHC showed the tumor cells in the light-staining area were strongly positive for vimentin and SMA, while cells in dark-staining area were strongly positive for vimentin, and weakly for SMA. Tumor cells were negative for desmin, S-100 protein, h-Caldesmon, CD34 and STAT6. Analysis of PDGFRB mutations was performed in seven cases. Two cases showed 12 exon point mutation c. 1681 c>T(p.R561C), one case showed 14 exon point mutation c. 1998C>G (p.N666K). ETV6-NTRK3 gene fusion was not detected by fluorescence in situ hybridization in four patients under three years old. All cases were followed for 6 to 68 months, with two recurrences. Conclusions Myofibroma/myofibromatosis is an uncommon benign myofibroblastic tumor of infancy and childhood. The tumor can appear biphasic, and may show PDGFRB point mutation which is of potential diagnostic value.

Objective:To construct a biospecimen bank of patient derived organoids (PDOs) from pancreatic cancer tissues and to explore the feasibility of PDOs drug sensitivity assay technology to guide chemotherapy drug selection for pancreatic cancer.Methods:Pancreatic cancer tissue specimens obtained after surgical resection and puncture biopsy from Mar 2020 to Dec 2022 at Drum Tower Hospital, Nanjing University School of Medicine were collected. Pancreatic cancer PDOs were cultured in vitro and histologically identified; PDOs were treated with gemcitabine, Nab-paclitaxel, fluorouracil, Oxaliplatin, and Irinotecan and cell viability was measured to analyze the correlation between PDOs drug sensitivity and the actual clinical treatment response.Results:The PDOs can reproduce the pathological features of corresponding tumor tissues; the sensitivity of different PDOs to the same chemotherapeutic drug is significantly different; The sensitivity of PDOs was highly consistent with the actual treatment effect of the corresponding patients 75.76% (25/33); organoid organ-based susceptibility testing had predictive value for the treatment response of patients (AUC=0.733, 95% CI: 0.546-0.919, P<0.05). Conclusion:A biobank of pancreatic cancer PDOs was successfully constructed, and the drug susceptibility test results were significantly correlated with the actual medication response of patients, suggesting that the drug susceptibility test technology based on PDOs has the potential to guide individualized chemotherapy for pancreatic cancer.