[Brain impairment induced by oral intake of lead and its effects on expression of Hoxa9 Gen in Rats].

Objective: To observe effects of oral intake of lead on the expression of Hoxa9 gen and the ability of learning and memory and explore the the toxic molecular mechanisms of lead.

Methods: Thirty male Wistar rats were chosen and randomly divided into the low lead dosage group, the high lead dosage group and the control group, 10 rats in each group. The low lead dosage group and the high lead dosage group were given respectively 0.

Surgical treatment of giant esophageal leiomyoma.

Aim: To summarize the operative experiences for giant leiomyoma of esophagus.

Methods: Eight cases of giant esophageal leiomyoma (GEL) whose tumors were bigger than 10 cm were treated surgically in our department from June 1980 to March 2004. All of these cases received barium swallow roentgenography and esophagoscopy.

[The antagonistic action of Gastrodia elata combined with E-gelatin on lead-induced down regulation of c-fos expression in rat brain].

Objective: To observe the effect of lead on the expression of c-fos mRNA in hippocampus and cerebellum and the ability of learning and memory in rat, and to observe the antagonistic action of Gastrodia elata and E-gelatin on the effect mentioned above.

Methods: Rats were exposed to lead acetate (0.2 g x kg(-1) x d(-1) and 0.

[Protective effect of Gastrodia elata and E-gelatin on lead-induced damage to the structure and function of rat hippocampus].

Objective: To observe the counteraction of Gastrodia elata and E-gelatin on the effect of subchronic lead poisoning on the ability of learning and memory and the ultrastructure in hippocampus.

Methods: Subchronic lead acetate exposure was given to rats (0.2 g x kg(-1) x d(-1)).