title: Effects of Streptococcus sanguinis Bacteriocin on Cell Surface Hydrophobicity, Membrane Permeability, and Ultrastructure of Candida Thallus.
abstract: Candida albicans (C.a) and Candida tropicalis (C.t) were treated with Streptococcus sanguinis bacteriocin (S.s bacteriocin), respectively; the bacteriostatic dynamics of S.s bacteriocin, their effects on cell surface hydrophobicity, leakage of inorganic phosphorus and macromolecular substance, cytosolic calcium concentration, and ultrastructure changes of Candida thallus were detected and analyzed. The results showed that inhibitory effect of S.s bacteriocin on C.a and C.t reached peak level at 24 h, the cell-surface hydrophobicity decreased significantly (P < 0.05) after S.s bacteriocin treatment, and there was leakage of cytoplasmic inorganic phosphorus and macromolecular substance from C.a and C.t; cytosolic calcium concentration decreased greatly. After 24 h treatment by S.s bacteriocin, depressive deformity and defect could be found in the cell surface of C.a and C.t; the thallus displayed irregular forms: C.a was shrunken, there was unclear margins abutting upon cell wall and cell membrane, nucleus disappeared, and cytoplasm was inhomogeneous; likewise, C.t was first plasmolysis, and then the cytoplasm was shrunk, the ultrastructure of cell wall and cell membrane was continuously damaged, and the nucleus was karyolysis. It was illustrated that S.s bacteriocin had similar antifungal effect on C.a and C.t; their cell surface hydrophobicity, membrane permeability, and ultrastructure were changed significantly on exposure to S.s bacteriocin.
authors.affiliation: Department of Stomatology, Hospital of Heilongjiang Province, Harbin 150036, China.
authors.forename: Shengli
authors.initials: S
authors.lastname: Ma
authors.affiliation: University of Jiamusi, Jiamusi 154002, China.
authors.forename: Yingnan
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: University of Jiamusi, Jiamusi 154002, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Xia
authors.affiliation: University of Jiamusi, Jiamusi 154002, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Dong
authors.affiliation: University of Jiamusi, Jiamusi 154002, China.
authors.forename: Wenyu
authors.initials: W
authors.lastname: Ge
authors.affiliation: The 2nd Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Li
mesh_terms: D000935:Antifungal Agents / Q000494:pharmacology; D001430:Bacteriocins / Q000737:chemistry / Q000494:pharmacology*; D002176:Candida albicans / Q000187:drug effects*; D041022:Candida tropicalis / Q000187:drug effects*; D002177:Candidiasis / Q000188:drug therapy* / Q000382:microbiology; D002448:Cell Adhesion / Q000187:drug effects; D002463:Cell Membrane Permeability / Q000187:drug effects; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions / Q000187:drug effects; D013298:Streptococcus sanguis / Q000737:chemistry
chemical_list: D000935:Antifungal Agents; D001430:Bacteriocins