Accidents, Occupational ; prevention & control ; Adolescent ; Dermatitis, Occupational ; etiology ; prevention & control ; Female ; Humans ; Male ; Trichloroethylene ; poisoning ; Young Adult

Objective To observe the effect of ligustrazine hydrochioridc(LHC) injection on TGF-β1 -induced proliferation and type IV collagen secretion in the human mesangial cells(HMCs). Methods The interstitial fibrosis in kidney disease was mimicked by inducing proliferation and type IV collagen secretion in HMCs with TGF- β1. The experiment was divided into 5 groups: blank, control, low, medium, and high(10, 30, and 100 μg/ml)ligustrazinc hydrochloride groups. MTT method was adopted to examine the proliferation and inhibition rate of HMCs. Enzyme-linked immunosorbent assay was used to determine the production of type IV collagen in cultured HMCs. Results LHC at high concentration (100 μg/ml) significantly inhibited the proliferation of HMCs (P<0. 01). LHC also inhibited the production of type IV collagen, with the significant inhibition found when at the concentration of 100 μg/ml (P

Acute Disease ; Chromates ; poisoning ; Humans ; Male ; Occupational Diseases ; Young Adult

Acute Disease ; Cytogenetics ; Humans ; Leukemia ; genetics

Objective To investigate clinical significance of proinsulin and true insulin in obese children with impaired glucose tolerance (IGT).Methods There were 21 IGT and 52 normal glucose tolerance (NGT) children. Control cases were 40 normal children. The levels of serum fasting proinsulin,true insulin,insulin,c-peptide and glucose were measured in all the subjects.Results 1.Levels of fasting proinsulin,c-peptide, glucose, insulin, true insulin and homeostasis insulin resistance in obese children with IGT showed significant difference compared with NGT (P

Animals ; Arrhythmias, Cardiac ; chemically induced ; etiology ; Female ; Heart ; drug effects ; In Vitro Techniques ; Lysophospholipids ; pharmacology ; physiology ; Male ; Random Allocation ; Rats ; Rats, Wistar

Objective: To examine the expression of α-melanocyte-stimulating hormone (α-MSH) and the melanin in different kinds of human skin autografts and in the normal skins, so as to elucidate the role of α-MSH in hyperpigmentation in the skin autografts. Methods: Immunohistochemical technique was employed to detect the expression and distribution of α-MSH in skin autografts (including the full thickness skin autografts, medium thickness skin autografts, razor-thin skin autografts, and normal skins adjacent to the donor site and the recipient site). Masson-Fontana staining technique was used to detect the melanin contents in all the above skin specimens. Results: The location of α-MSH expression was at the cytoplasm of melanocytes and keratinocytes in epiderm; α-MSH was positive in most skin autografts and its expression was higher in the thinner skin autografts. The expression of α-MSH in all types of skin autografts was significantly different from that in normal skin (P<0.01); α-MS expression was also significantly different between all the skin autografts (P<0.01); α-MSH expression in normal skin around donor site and recipient site had no statistical difference. The contents of melanin in skin autografts was obvious increased compared with that in normal skin(P<0.01); the contents of melanin between all the skin autografts were also significantly different (P<0.01). The melanin contents increased with the decrease of skin autografts thickness. The expression of α-MSH was positively correlated with the contents of melanin in epidermis. Conclusion: The expression of α-MSH in skin autografts is positively correlated with the contents of melanin in skin autografts. Overexpression of α-MSH may play an important role in hyperpigmentation process of skin autografts.

Objective: To study the influence of agouti signal protein (ASIP) on melanocyte function in skin autograft, so as to understand the cause of hyperpigmentation in skin autograft. Methods: Guinea pigs were used to establish a skin autograft hyperpigmentation model. The skin autografts in model animals were injected with ASIP or normal saline (control). RT-PCR technique was used to detect the tyrosinase mRNA expression in melanocytes of skin autografts and Masson-Fontana staining technique was used to detect the melanin contents in skin autografts in ASIP treatment group; and the results were compared with those of control group (n=13) and normal guinea pigs (n=5). Results: The expression of tyrosinase mRNA and the melanin content in skin autografts in ASIP treatment group were both lower than those of control group and normal guinea pigs (P<0.01). Conclusion: The results indicate that ASIP can antagonize the melanogenic effect of α-MSH, resulting in reduced pigmentation in skin autografts. It is also indicated that overexpression of α-MSH in epidermal cells after skin grafting is an important cause of hyperpigmentation in skin autografts.

Objective To explore the effects of citicoline injection into Zusanli point (ST36) on learning and memory function of rats after traumatic brain injury (TBI). Methods The model was induced with the improved Feeney method. The rats were randomly divided into 5 groups: sham-operation group, control group, acupuncture point saline injection group, intraperitoneal drug injection group and acupuncture point drug injection group with 8 rats in each group. The rats in the acupuncture point drug or saline injection group were treated with acupuncture injection of citicoline or saline daily. The rats in the intraperitoneal drug injection group and control group were treated with intraperitoneal injection of citicoline or saline daily. The treatment continued for 14 d. The learning and memory function was evaluated with the Morris water maze test and passive avoidance test. Results Acupuncture point injection of citicoline can significantly shorten the escape latent period of TBI rats in Morris water tests and extend the latent period of learning and memory of TBI rats (P<0.05). Conclusion Acupuncture point injection is effective on the recovery of learning and memory function of rats after TBI.