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Article

pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats

  • Authors:
    • Chun-Le Zhang
    • Zhi-Jun Duan
    • Ge Tian
    • Yan Tian
    • Gao-Hong He
    • Teng-Fei Bian
    • Xue Jin
    • Xiao-Yu Sun
    • Zhen Liu
    • Qing-Yong Chang
  • View Affiliations / Copyright

    Affiliations: Department of Gastroenterology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China, Pharmaceutical College, Dalian Medical University, Dalian, Liaoning 116044, P.R. China, Membrane Science and Technology Center, Dalian University of Technology, Dalian, Liaoning 116012, P.R. China, Department of Neurosurgery, Zhongshan Affiliated Hospital of Dalian University, Dalian, Liaoning 116001, P.R. China
  • Pages: 3925-3933
    |
    Published online on: January 14, 2015
       https://doi.org/10.3892/mmr.2015.3201
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Abstract

Microemulsions with limited stability in mimetic gastrointestinal environments have previously demonstrated potential for the effective removal of ammonia from artificial colonic fluid. Specialized pH‑sensitive microemulsion‑based gels for the removal of colonic ammonia (MBG‑RCA), however, possess relative stability in the gastrointestinal (GI) tract of normal rats, indicating potential use in in vivo applications. An investigation of the effects of oral MBG‑RCA was conducted in order to evaluate the reduction of intestinal ammonia and the prevention of hepatic encephalopathy (HE) in rat models. Eighty rats were allocated into eight 4‑day treatment groups: The HE model (intraperitoneal injection of thioacetamide) group; the high‑, medium‑ and low‑dose MBG‑RCA therapeutic groups (15, 10 and 5 ml/kg MBG‑RCA, respectively); and the normal, blank, lactulose and acetic acid control groups, each of which received daily treatment administration. Oral MBG‑RCA effects were identified using behavioral monitoring observed by an infrared night vision supervisory control system, electroencephalograms, blood ammonia levels, intestinal ammonia levels, liver functionality and pathological observation. High‑ and medium‑dose oral administrations of MBG‑RCA significantly decreased the blood and intestinal ammonia levels (P<0.05), improved liver functionality and reduced the clinical manifestations of HE in rats. MBG‑RCA demonstrated high clearance of rat colonic ammonia while maintaining sufficient stability in the GI tract, indicating the potential for the development of new clinically relevant oral preparations for the prevention of HE. Additionally, such preparations are advantageous in that ammonia is eliminated without the production of potentially harmful metabolic byproducts.
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Copy and paste a formatted citation
Spandidos Publications style
Zhang C, Duan Z, Tian G, Tian Y, He G, Bian T, Jin X, Sun X, Liu Z, Chang Q, Chang Q, et al: pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats. Mol Med Rep 11: 3925-3933, 2015.
APA
Zhang, C., Duan, Z., Tian, G., Tian, Y., He, G., Bian, T. ... Chang, Q. (2015). pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats. Molecular Medicine Reports, 11, 3925-3933. https://doi.org/10.3892/mmr.2015.3201
MLA
Zhang, C., Duan, Z., Tian, G., Tian, Y., He, G., Bian, T., Jin, X., Sun, X., Liu, Z., Chang, Q."pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats". Molecular Medicine Reports 11.5 (2015): 3925-3933.
Chicago
Zhang, C., Duan, Z., Tian, G., Tian, Y., He, G., Bian, T., Jin, X., Sun, X., Liu, Z., Chang, Q."pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats". Molecular Medicine Reports 11, no. 5 (2015): 3925-3933. https://doi.org/10.3892/mmr.2015.3201
Copy and paste a formatted citation
x
Spandidos Publications style
Zhang C, Duan Z, Tian G, Tian Y, He G, Bian T, Jin X, Sun X, Liu Z, Chang Q, Chang Q, et al: pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats. Mol Med Rep 11: 3925-3933, 2015.
APA
Zhang, C., Duan, Z., Tian, G., Tian, Y., He, G., Bian, T. ... Chang, Q. (2015). pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats. Molecular Medicine Reports, 11, 3925-3933. https://doi.org/10.3892/mmr.2015.3201
MLA
Zhang, C., Duan, Z., Tian, G., Tian, Y., He, G., Bian, T., Jin, X., Sun, X., Liu, Z., Chang, Q."pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats". Molecular Medicine Reports 11.5 (2015): 3925-3933.
Chicago
Zhang, C., Duan, Z., Tian, G., Tian, Y., He, G., Bian, T., Jin, X., Sun, X., Liu, Z., Chang, Q."pH-sensitive microemulsion-based gels for removal of colonic ammonia: A novel preventative oral preparation for hepatic encephalopathy in rats". Molecular Medicine Reports 11, no. 5 (2015): 3925-3933. https://doi.org/10.3892/mmr.2015.3201
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