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Chinese Archives of General Surgery(Electronic Edition) ›› 2015, Vol. 09 ›› Issue (05): 346-350. doi: 10.3877/cma.j.issn.1674-0793.2015.05.005

Special Issue:

• Original Article • Previous Articles     Next Articles

Role of Oddi sphincter motility in the process of cholesterol gallbladder stone formation in guinea pigs

Chengsheng Gao1, Chengkun Qin2, Wenmao Geng2, Xianping Cui2, Guozhe Xian2, Zhenhai Zhang2,()   

  1. 1. Department of General Surgery, Laicheng District People’s Hospital of Shandong Province, Laiwu 271100, China
    2. Department of Hepatobiliary Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
  • Received:2015-05-16 Online:2015-10-01 Published:2015-10-01
  • Contact: Zhenhai Zhang
  • About author:
    Corresponding author: Zhang Zhenhai, Email:

Abstract:

Objective

To investigate the role of Oddi sphincter motility in cholesterol gallbladder stone formation in model of guinea pigs.

Methods

Thirty-four adult male Hartley guinea pigs were divided randomly into two groups, control group (10 guinea pigs) and cholesterol stone groups (divided into 4 subgroups with 6 guinea pigs in each according to time they were sacrificed). The animals in cholesterol stone groups were fed with cholesterol lithogenic diet and sacrificed after 3, 6, 9 and 12 weeks. Sphincter of Oddi manometry and recording of myoelectric activity of the guinea pigs were obtained by multifunctional physiograph at each stage.

Results

The incidence of cholesterol gallstone formation was 0, 16.7%, 16.7% and 83.3% in 3 w, 6 w, 9 w and 12 w group. The frequency of myoelectric activity decreased apparently in the 3 w group and 6 w group (P<0.05). The amplitude of myoelectric activity decreased apparently, from (146.44±81.09) μV to (68.18±49.58) μV and (40.60±45.03) μV in the 9 w group and the 12 w group (P<0.05). The frequency of Oddi sphincter decreased apparently in the 6 w and 9 w group (P<0.05). The Oddi sphincter basal pressure and common bile duct pressure increased apparently in the 12 w group, from (25.19±7.77) mmHg to (52.38±12.84) mmHg and from (22.35±7.60) mmHg to (50.11±12.59) mmHg, respectively (P<0.01).

Conclusions

Cholesterol gallstone-causing diet can induce dysfunction of Oddi sphincter, the tension increased and its activity decreased. The disturbance of Oddi sphincter motility plays an important role in cholesterol gallstone formation.

Key words: Cholesterol gallstone, Oddi sphincter, Manometry, Myoelectric activity, Guinea pig

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