Biomedical subjects

Weiguo Wang

Publications and source records attributed to Weiguo Wang.

3 recordsLinked to original sources

PubMed2005

[A hydrostatic compression device capable of generating both intermittent compressive forces and continuous compressive forces].

A hydrostatic compression device has been designed to study the effects of intermittent or continuous compressive forces on cells by trying to mimic in vivo forces. The model system is composed of two pistons that deliver and release compressed air under control of a motor to form an enclosed tissue culture chamber housing numerous tissues culture dishes. The continuous compressive forces and intermittent compressive forces are within 100-300 KPa and 0-30 KPa respectively. The compressive force is uniform in the system and can also result in the generation of shear forces along the interface between the cells and culture substratum, so the hydrostatic compression device can be used to study the characteristics of in vitro cells loading models.

Biomechanical Phenomena↗

PubMed2004

Effective gene-viral therapy for telomerase-positive cancers by selective replicative-competent adenovirus combining with endostatin gene.

Gene-viral therapy, which uses replication-selective transgene-expressing viruses to manage tumors, can exploit the virtues of gene therapy and virotherapy and overcome the limitations of conventional gene therapy. Using a human telomerase reverse transcriptase-targeted replicative adenovirus as an antiangiogenic gene transfer vector to target new angiogenesis and making use of its unrestrained proliferation are completely new concepts in tumor management. CNHK300-mE is a selective replication transgene-expressing adenovirus constructed to carry mouse endostatin gene therapeutically. Infection with CNHK300-mE was associated with selective replication of the adenovirus and production of mouse endostatin in telomerase-positive cancer cells. Endostatin secreted from a human gastric cell line, SGC-7901, infected with CNHK300-mE was significantly higher than that infected with nonreplicative adenovirus Ad-mE in vitro (800 +/- 94.7 ng/ml versus 132.9 +/- 9.9 ng/ml) and in vivo (610 +/- 42 ng/ml versus 126 +/- 13 ng/ml). Embryonic chorioallantoic membrane assay showed that the mouse endostatin secreted by CNHK300-mE inhibited angiogenesis efficiently and also induced distortion of pre-existing vasculature. CNHK300-mE exhibited a superior suppression of xenografts in nude mice compared with CNHK300 and Ad-mE. In summary, we provided a more efficient gene-viral therapy strategy by combining oncolysis with antiangiogenesis.

Adenoviridae↗

PubMed2002

[Ultraearly treatment on sudden deafness and the influence on superoxide dismutase and malonyldialdehyde of serum].

OBJECTIVE: To explore the effect of treatment on sudden deafness at ultra-early stage and the influence on Malonyldialdehyde (MDA) and superoxide dismutase(SOD) of serum. METHODS: One hundred and forty-seven cases of sudden deafness (168 ears) from July 1995 to June 2001 were divided into three groups, 29 cases (36 ears) in group I treated within 6 hours after deafness, 55 cases(63 ears) in group II treated within 15 days after deafness, and 63 cases (69 ears) in group III treatment after 15 days after deafness. Total cases were treated with medicine and hyperbaric oxygen and the volume of SOD and MDA of serum were observed at the same time. There were 30 healthy volunteers as control group. RESULTS: In the group I, the hearing threshold was recovered in 18 ears, significant improved in 9 ears, improved in 7 ears and not changed in 2 ears after treatment. In the group II, the hearing threshold was recovered in 11 ears, significant improved in 16 ears, improved in 15 ears and no changed in 21 ears after treatment. In the group III, the hearing threshold was recovered in 14 ears, significant improved in 20 ears, improved in 13 ears and no changed in 22 ears after treatment. There was a significant difference in improved level of hearing between the group I and group II. (chi 2 = 9.90, P < 0.01) and between group I and group III (chi 2 = 9.30, P < 0.01). There was no significant difference between group II and group III (chi 2 = 0.03, P > 0.01). CONCLUSION: The treatment on sudden deafness in ultra-early stage is very important. The use of free radical scavenger early can protect audio nerve.

Adult↗