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Li Q, Li Y, Bai Y, Zhang H, Zhao W. Development and validation of a predictive model for the risk of developing trichomonas vaginitis in women. Sci Rep 2022; 12:20182. [PMID: 36424393 PMCID: PMC9691695 DOI: 10.1038/s41598-022-24396-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 11/15/2022] [Indexed: 11/27/2022] Open
Abstract
Trichomonas vaginitis (TV) is the most common non-viral sexually transmitted infection (STI) worldwide. The high prevalence of TV combined with mild or asymptomatic early symptoms leads to clinical vulnerability from delayed diagnosis. Latent infection can increase the incidence of pelvic infections, infertility, and adverse pregnancy complications. Data from 898 women who underwent vaginal flora testing from June 2014 to December 2014 were used to create a nomogram to assess the risk of TV in women in order to guide TV prevention and clinical intervention. The prediction model was evaluated in terms of identification, calibration, and clinical utility using the C-index, calibration plots, decision curve analysis, and internal validation. Predictors in the TV nomogram included age, occupation, yearly income, tea drinking, bathing frequency, menopause, spontaneous abortion, use of contraceptives, history of gynecological surgery, and HPV infection. The C-index of the TV risk prediction model was 0.732 (95% confidence interval: 0.695-0.768). It showed good discriminatory and predictive power. Decision curve analysis indicated that the nomogram had a good net benefit when the threshold probability of TV in women was 2-80%. The established TV prediction model easily, accurately, and quickly predicts the risk of TV onset.
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Affiliation(s)
- Qi Li
- grid.452845.a0000 0004 1799 2077Department of Obstetrics and Gynecology, the Second Hospital of Shanxi Medical University, Taiyuan, 030001 Shanxi China ,grid.263452.40000 0004 1798 4018Shanxi Medical University, Taiyuan, China
| | - Yaqin Li
- grid.452845.a0000 0004 1799 2077Department of Obstetrics and Gynecology, the Second Hospital of Shanxi Medical University, Taiyuan, 030001 Shanxi China ,grid.263452.40000 0004 1798 4018Shanxi Medical University, Taiyuan, China
| | - Ying Bai
- grid.452845.a0000 0004 1799 2077Department of Obstetrics and Gynecology, the Second Hospital of Shanxi Medical University, Taiyuan, 030001 Shanxi China ,grid.263452.40000 0004 1798 4018Shanxi Medical University, Taiyuan, China
| | - Honglei Zhang
- grid.263452.40000 0004 1798 4018Department of Pathology and Pathophysiology, Basic Medical College, Shanxi Medical University, Taiyuan, China
| | - Weihong Zhao
- grid.452845.a0000 0004 1799 2077Department of Obstetrics and Gynecology, the Second Hospital of Shanxi Medical University, Taiyuan, 030001 Shanxi China
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Tam CC, Nguyen K, Nguyen D, Hamada S, Kwon O, Kuang I, Gong S, Escobar S, Liu M, Kim J, Hou T, Tam J, Cheng LW, Kim JH, Land KM, Friedman M. Antimicrobial properties of tomato leaves, stems, and fruit and their relationship to chemical composition. BMC Complement Med Ther 2021; 21:229. [PMID: 34517859 PMCID: PMC8436577 DOI: 10.1186/s12906-021-03391-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 08/17/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND We previously reported that the tomato glycoalkaloid tomatine inhibited the growth of Trichomonas vaginalis strain G3, Tritrichomonas foetus strain D1, and Tritrichomonas foetus-like strain C1 that cause disease in humans and farm and domesticated animals. The increasing prevalence of antibiotic resistance requires development of new tools to enhance or replace medicinal antibiotics. METHODS Wild tomato plants were harvested and divided into leaves, stems, and fruit of different colors: green, yellow, and red. Samples were freeze dried and ground with a handheld mill. The resulting powders were evaluated for their potential anti-microbial effects on protozoan parasites, bacteria, and fungi. A concentration of 0.02% (w/v) was used for the inhibition of protozoan parasites. A high concentration of 10% (w/v) solution was tested for bacteria and fungi as an initial screen to evaluate potential anti-microbial activity and results using this high concentration limits its clinical relevance. RESULTS Natural powders derived from various parts of tomato plants were all effective in inhibiting the growth of the three trichomonads to varying degrees. Test samples from leaves, stems, and immature 'green' tomato peels and fruit, all containing tomatine, were more effective as an inhibitor of the D1 strain than those prepared from yellow and red tomato peels which lack tomatine. Chlorogenic acid and quercetin glycosides were present in all parts of the plant and fruit, while caffeic acid was only found in the fruit peels. Any correlation between plant components and inhibition of the G3 and C1 strains was not apparent, although all the powders were variably effective. Tomato leaf was the most effective powder in all strains, and was also the highest in tomatine. S. enterica showed a minor susceptibility while B. cereus and C. albicans fungi both showed a significant growth inhibition with some of the test powders. The powders inhibited growth of the pathogens without affecting beneficial lactobacilli found in the normal flora of the vagina. CONCLUSIONS The results suggest that powders prepared from tomato leaves, stems, and green tomato peels and to a lesser extent from peels from yellow and red tomatoes offer potential multiple health benefits against infections caused by pathogenic protozoa, bacteria, and fungi, without affecting beneficial lactobacilli that also reside in the normal flora of the vagina.
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Affiliation(s)
- Christina C Tam
- Foodborne Toxin Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, California, 94710, USA
| | - Kevin Nguyen
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Daniel Nguyen
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Sabrina Hamada
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Okhun Kwon
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Irene Kuang
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Steven Gong
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Sydney Escobar
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Max Liu
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Jihwan Kim
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Tiffany Hou
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Justin Tam
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Luisa W Cheng
- Foodborne Toxin Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, California, 94710, USA
| | - Jong H Kim
- Foodborne Toxin Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, California, 94710, USA
| | - Kirkwood M Land
- Department of Biological Sciences, University of the Pacific, Stockton, California, 95211, USA
| | - Mendel Friedman
- Healthy Processed Foods Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, California, 94710, USA.
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Friedman M, Tam CC, Kim JH, Escobar S, Gong S, Liu M, Mao XY, Do C, Kuang I, Boateng K, Ha J, Tran M, Alluri S, Le T, Leong R, Cheng LW, Land KM. Anti-Parasitic Activity of Cherry Tomato Peel Powders. Foods 2021; 10:230. [PMID: 33498638 PMCID: PMC7912415 DOI: 10.3390/foods10020230] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 12/20/2022] Open
Abstract
Trichomoniasis in humans, caused by the protozoal parasite Trichomonas vaginalis, is the most common non-viral sexually transmitted disease, while Tritrichomonas foetus causes trichomonosis, an infection of the gastrointestinal tract and diarrhea in farm animals and domesticated cats. As part of an effort to determine the inhibitory effects of plant-based extracts and pure compounds, seven commercially available cherry tomato varieties were hand-peeled, freeze-dried, and pounded into powders. The anti-trichomonad inhibitory activities of these peel powders at 0.02% concentration determined using an in vitro cell assay varied widely from 0.0% to 66.7% against T. vaginalis G3 (human); from 0.9% to 66.8% for T. foetus C1 (feline); and from 0.0% to 81.3% for T. foetus D1 (bovine). The organic Solanum lycopersicum var. cerasiforme (D) peels were the most active against all three trichomonads, inhibiting 52.2% (G3), 66.8% (C1), and 81.3% (D1). Additional assays showed that none of the powders inhibited the growth of foodborne pathogenic bacteria, pathogenic fungi, or non-pathogenic lactobacilli. Tomato peel and pomace powders with high content of described biologically active compounds could serve as functional food and feed additives that might help overcome adverse effects of wide-ranging diseases and complement the treatment of parasites with the anti-trichomonad drug metronidazole.
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Affiliation(s)
- Mendel Friedman
- Healthy Processed Foods Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA
| | - Christina C. Tam
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA; (C.C.T.); (J.H.K.); (L.W.C.)
| | - Jong H. Kim
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA; (C.C.T.); (J.H.K.); (L.W.C.)
| | - Sydney Escobar
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Steven Gong
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Max Liu
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Xuan Yu Mao
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Cindy Do
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Irene Kuang
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Kelvin Boateng
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Janica Ha
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Megan Tran
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Srimanth Alluri
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Tam Le
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Ryan Leong
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
| | - Luisa W. Cheng
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA; (C.C.T.); (J.H.K.); (L.W.C.)
| | - Kirkwood M. Land
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (S.E.); (S.G.); (M.L.); (X.Y.M.); (C.D.); (I.K.); (K.B.); (J.H.); (M.T.); (S.A.); (T.L.); (R.L.); (K.M.L.)
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Friedman M, Tam CC, Cheng LW, Land KM. Anti-trichomonad activities of different compounds from foods, marine products, and medicinal plants: a review. BMC Complement Med Ther 2020; 20:271. [PMID: 32907567 PMCID: PMC7479404 DOI: 10.1186/s12906-020-03061-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 08/25/2020] [Indexed: 02/07/2023] Open
Abstract
Human trichomoniasis, caused by the pathogenic parasitic protozoan Trichomonas vaginalis, is the most common non-viral sexually transmitted disease that contributes to reproductive morbidity in affected women and possibly to prostate cancer in men. Tritrichomonas foetus strains cause the disease trichomoniasis in farm animals (cattle, bulls, pigs) and diarrhea in domestic animals (cats and dogs). Because some T. vaginalis strains have become resistant to the widely used drug metronidazole, there is a need to develop alternative treatments, based on safe natural products that have the potential to replace and/or enhance the activity of lower doses of metronidazole. To help meet this need, this overview collates and interprets worldwide reported studies on the efficacy of structurally different classes of food, marine, and medicinal plant extracts and some of their bioactive pure compounds against T. vaginalis and T. foetus in vitro and in infected mice and women. Active food extracts include potato peels and their glycoalkaloids α-chaconine and α-solanine, caffeic and chlorogenic acids, and quercetin; the tomato glycoalkaloid α-tomatine; theaflavin-rich black tea extracts and bioactive theaflavins; plant essential oils and their compounds (+)-α-bisabolol and eugenol; the grape skin compound resveratrol; the kidney bean lectin, marine extracts from algae, seaweeds, and fungi and compounds that are derived from fungi; medicinal extracts and about 30 isolated pure compounds. Also covered are the inactivation of drug-resistant T. vaginalis and T. foetus strains by sensitized light; anti-trichomonad effects in mice and women; beneficial effects of probiotics in women; and mechanisms that govern cell death. The summarized findings will hopefully stimulate additional research, including molecular-mechanism-guided inactivations and human clinical studies, that will help ameliorate adverse effects of pathogenic protozoa.
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Affiliation(s)
- Mendel Friedman
- United States Department of Agriculture, Healthy Processed Foods Research Unit, Agricultural Research Service, Albany, CA, 94710, USA.
| | - Christina C Tam
- United States Department of Agriculture, Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, Albany, California, 94710, USA
| | - Luisa W Cheng
- United States Department of Agriculture, Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, Albany, California, 94710, USA
| | - Kirkwood M Land
- Department of Biological Sciences, University of the Pacific, Stockton, CA, 95211, USA
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Friedman M, Xu A, Lee R, N. Nguyen D, A. Phan T, M. Hamada S, Panchel R, C. Tam C, H. Kim J, W. Cheng L, M. Land K. The Inhibitory Activity of Anthraquinones against Pathogenic Protozoa, Bacteria, and Fungi and the Relationship to Structure. Molecules 2020; 25:molecules25133101. [PMID: 32646028 PMCID: PMC7411742 DOI: 10.3390/molecules25133101] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 01/09/2023] Open
Abstract
Plant-derived anthraquinones were evaluated in cell assays for their inhibitory activities against the parasitic protozoa Trichomonas vaginalis human strain G3 that causes the sexually transmitted disease trichomoniasis in women, Tritrichomonas foetus bovine strain D1 that causes sexually transmitted diseases in farm animals (bulls, cows, and pigs), Tritrichomonas foetus-like strain C1 that causes diarrhea in domestic animals (cats and dogs), and bacteria and fungi. The anthraquinones assessed for their inhibitory activity were anthraquinone, aloe-emodin (1,8-dihydroxy-3-hydroxymethylanthraquinone), anthrarufin (1,5-dihydroxyanthraquinone), chrysazin (1,8-dihydroxyanthraquinone), emodin (1,3,8-trihydroxy-6-methylanthraquinone), purpurin (1,2,4-trihydroxyanthraquinone), and rhein (1,8-dihydroxy-3-carboxyanthraquinone). Their activities were determined in terms of IC50 values, defined as the concentration that inhibits 50% of the cells under the test conditions and calculated from linear dose response plots for the parasitic protozoa, and zone of inhibition for bacteria and fungi, respectively. The results show that the different substituents on the anthraquinone ring seem to influence the relative potency. Analysis of the structure–activity relationships in protozoa indicates that the aloe-emodin and chrysazin with the highest biological activities merit further study for their potential to help treat the diseases in women and domestic and farm animals. Emodin also exhibited antifungal activity against Candida albicans. The suggested mechanism of action and the additional reported beneficial biological properties of anthraquinones suggest that they have the potential to ameliorate a broad spectrum of human diseases.
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Affiliation(s)
- Mendel Friedman
- Healthy Processed Foods Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA
- Correspondence: ; Tel.: +1-510-559-5615
| | - Alexander Xu
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (A.X.); (R.L.); (D.N.N.); (T.A.P.); (S.M.H.); (R.P.); (K.M.L.)
| | - Rani Lee
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (A.X.); (R.L.); (D.N.N.); (T.A.P.); (S.M.H.); (R.P.); (K.M.L.)
| | - Daniel N. Nguyen
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (A.X.); (R.L.); (D.N.N.); (T.A.P.); (S.M.H.); (R.P.); (K.M.L.)
| | - Tina A. Phan
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (A.X.); (R.L.); (D.N.N.); (T.A.P.); (S.M.H.); (R.P.); (K.M.L.)
| | - Sabrina M. Hamada
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (A.X.); (R.L.); (D.N.N.); (T.A.P.); (S.M.H.); (R.P.); (K.M.L.)
| | - Rima Panchel
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (A.X.); (R.L.); (D.N.N.); (T.A.P.); (S.M.H.); (R.P.); (K.M.L.)
| | - Christina C. Tam
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA; (C.C.T.); (J.H.K.); (L.W.C.)
| | - Jong H. Kim
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA; (C.C.T.); (J.H.K.); (L.W.C.)
| | - Luisa W. Cheng
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service, United States Department of Agriculture, Albany, CA 94710, USA; (C.C.T.); (J.H.K.); (L.W.C.)
| | - Kirkwood M. Land
- Department of Biological Sciences, University of the Pacific, Stockton, CA 95211, USA; (A.X.); (R.L.); (D.N.N.); (T.A.P.); (S.M.H.); (R.P.); (K.M.L.)
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Kim SP, Lee SJ, Nam SH, Friedman M. The composition of a bioprocessed shiitake (Lentinus edodes) mushroom mycelia and rice bran formulation and its antimicrobial effects against Salmonella enterica subsp. enterica serovar Typhimurium strain SL1344 in macrophage cells and in mice. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 18:322. [PMID: 30518352 PMCID: PMC6282263 DOI: 10.1186/s12906-018-2365-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 10/29/2018] [Indexed: 02/06/2023]
Abstract
Background Human infection by pathogenic Salmonella bacteria can be acquired by consuming of undercooked meat products and eggs. Antimicrobial resistance against antibiotics used in medicine is also a major concern. To help overcome these harmful effects on microbial food safety and human health, we are developing novel antimicrobial food-compatible formulations, one of which is described in the present study. Methods The composition of a bioprocessed (fermented) rice bran extract (BPRBE) from Lentinus edodes liquid mycelia culture was evaluated using gas chromatography and mass spectrometry, and the mechanism of its antibacterial effect against Salmonella Typhimurium, strain SL1344 was investigated in macrophage cells and in mice. Results BPRBE stimulated uptake of the bacteria into RAW 264.7 murine macrophage cells. Activation of the cells was confirmed by increases in NO production resulting from the elevation of inducible nitric oxide synthase (iNOS) mRNA, and in protein expression. Salmonella infection down-regulated the expression of the following protein biomarkers of autophagy (a catabolic process for stress adaptation of cellular components): Beclin-1, Atg5, Atg12, Atg16, LC3-I and LC3-II. BPRBE promoted the upregulation of protein expressions that induced bacterial destruction in autolysosomes of RAW 264.7 cells. ELISA analysis of interferon IFN-β showed that inflammatory cytokine secretion and bactericidal activity had similar profiles, suggesting that BPRBE enhances cell-autonomous and systemic bactericidal activities via autophagic capture of Salmonella. The treatment also elicited increased excretion of bacteria in feces and their decreased translocation to internal organs (cecum, mesenteric lymph node, spleen, and liver). Conclusions The antibiotic mechanism of BPRBE involves the phagocytosis of extracellular bacteria, autophagic capture of intracellular bacteria, and prevention of translocation of bacteria across the intestinal epithelial cells. The new bioprocessing combination of mushroom mycelia and rice brans forms a potentially novel food formulation with in vivo antimicrobial properties that could serve as a functional antimicrobial food and medical antibiotic.
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Friedman M, Huang V, Quiambao Q, Noritake S, Liu J, Kwon O, Chintalapati S, Young J, Levin CE, Tam C, Cheng LW, Land KM. Potato Peels and Their Bioactive Glycoalkaloids and Phenolic Compounds Inhibit the Growth of Pathogenic Trichomonads. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7942-7947. [PMID: 30039703 DOI: 10.1021/acs.jafc.8b01726] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Potato peel, a waste product of the potato processing industry, is high in bioactive compounds. We investigated the in vitro antitrichomonad activity of potato peel powders prepared from commercial Russet, red, purple, and fingerling varieties as well as several known potato components, alkaloids and phenolic compounds, against three pathogenic strains of trichomonads. Trichomonas vaginalis is a sexually transmitted protozoan parasite that causes the human disease trichomoniasis. Two distinct strains of the related Tritrichomonas fetus infect cattle and cats. The glycoalkaloids α-chaconine and α-solanine were highly active against all parasite lines, while their common aglycone solanidine was only mildly inhibitory. α-Solanine was several times more active than α-chaconine. The phenolic compounds caffeic and chlorogenic acids and quercetin were mildly active against the parasites. Most of the potato peel samples were at least somewhat active against all three trichomonad species, but their activities were wide-ranging and did not correspond to their glycoalkaloid and phenolic content determined by HPLC. The two Russet samples were the most active against all three parasites. The purple potato peel sample was highly active against bovine and mostly inactive against feline trichomonads. None of the test substances were inhibitory toward several normal microflora species, suggesting the potential use of the peels for targeted therapeutic treatments against trichomonads.
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Affiliation(s)
- Mendel Friedman
- Healthy Processed Foods Research Unit, Agricultural Research Service , United States Department of Agriculture , Albany , California 94556 , United States
| | - Vincent Huang
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
| | - Quincel Quiambao
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
| | - Sabrina Noritake
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
| | - Jenny Liu
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
| | - Ohkun Kwon
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
| | - Sirisha Chintalapati
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
| | - Joseph Young
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
| | - Carol E Levin
- Healthy Processed Foods Research Unit, Agricultural Research Service , United States Department of Agriculture , Albany , California 94556 , United States
| | - Christina Tam
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service , United States Department of Agriculture , Albany , California 94556 , United States
| | - Luisa W Cheng
- Foodborne Toxins Detection and Prevention Research Unit, Agricultural Research Service , United States Department of Agriculture , Albany , California 94556 , United States
| | - Kirkwood M Land
- Department of Biological Sciences , University of the Pacific , Stockton , California 95211 , United States
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Kim SP, Lee SJ, Nam SH, Friedman M. Mechanism of Antibacterial Activities of a Rice Hull Smoke Extract (RHSE) Against Multidrug-Resistant Salmonella Typhimurium In Vitro and in Mice. J Food Sci 2017; 83:440-445. [PMID: 29266224 DOI: 10.1111/1750-3841.14020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/13/2017] [Accepted: 11/27/2017] [Indexed: 12/11/2022]
Abstract
The present study tested antibacterial activity of a rice hull smoke extract (RHSE) against a multidrug-resistant strain of Salmonella Typhimurium and examined its mode of suppressive action in vitro and in mice. In vitro studies showed that the minimum inhibitory concentration (MIC) value of RHSE was 1.29% (v/v). The inactivation was confirmed by complete loss of cell viability in the range of 104 to 107 colony forming units of the resistant Salmonella Typhimurium strain. Agarose and sodium dodecyl sulfate-polyacrylamide gel electrophoreses were used to evaluate the integrities of bacterial genomic DNA and total cellular protein profiles. The antibacterial action of RHSE results from a leakage of intracellular macromolecules following rupture of bacterial cells. Scanning electron microscopy of the cells shows that RHSE also induced deleterious morphological changes in the bacterial cell membrane of the pathogens. In vivo antibacterial activity of RHSE at a 1 × MIC concentration was examined in a bacterial gastroenteritis model using Balb/c mice orally infected with the Salmonella Typhimurium. The results show greatly decreased excretion of the bacteria into the feces and suppressed translocation of the bacteria to internal organs (cecum, mesenteric lymph node, spleen, and liver) compared with the infected mice not subjected to the RHSE treatment. Collectively, the present findings indicate that the mechanism of the antibacterial activities both in vitro and in the gastroenteritis environment of the animal model is the result of the direct disruption of cell structure, leading to cell death. RHSE has the potential to serve as a multifunctional food additive that might protect consumers against infections by antibiotic-resistant microorganisms. PRACTICAL APPLICATION The rice hull derived liquid smoke has the potential to complement widely used wood-derived smoke as an antimicrobial flavor and health-promoting formulation for application in foods and feeds.
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Affiliation(s)
- Sung Phil Kim
- STR Biotech Ltd., Chuncheon 24232, Republic of Korea.,Research Inst. of Basic Sciences, Ajou Univ., Suwon 164499, Republic of Korea
| | - Sang Jong Lee
- STR Biotech Ltd., Chuncheon 24232, Republic of Korea
| | - Seok Hyun Nam
- Dept. of Biological Science, Ajou Univ., Suwon 16499, Republic of Korea
| | - Mendel Friedman
- U.S. Dept. of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA 94710, U.S.A
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Friedman M. Chemistry, Antimicrobial Mechanisms, and Antibiotic Activities of Cinnamaldehyde against Pathogenic Bacteria in Animal Feeds and Human Foods. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10406-10423. [PMID: 29155570 DOI: 10.1021/acs.jafc.7b04344] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Cinnamaldehyde is a major constituent of cinnamon essential oils produced by aromatic cinnamon plants. This compound has been reported to exhibit antimicrobial properties in vitro in laboratory media and in animal feeds and human foods contaminated with disease-causing bacteria including Bacillus cereus, Campylobacter jejuni, Clostridium perfringens, Escherichia coli, Listeria monocytogenes, and Salmonella enterica. This integrated review surveys and interprets our current knowledge of the chemistry, analysis, safety, mechanism of action, and antibiotic activities of cinnamaldehyde in food animal (cattle, lambs, calves, pigs, poultry) diets and in widely consumed liquid (apple, carrot, tomato, and watermelon juices, milk) and solid foods. Solid foods include various fruits (bayberries, blueberries, raspberries, and strawberries), vegetables (carrots, celery, lettuce, spinach, cucumbers, and tomatoes), meats (beef, ham, pork, and frankfurters), poultry (chickens and turkeys), seafood (oysters and shrimp), bread, cheese, eggs, infant formula, and peanut paste. The described findings are not only of fundamental interest but also have practical implications for food safety, nutrition, and animal and human health. The collated information and suggested research needs will hopefully facilitate and guide further studies needed to optimize the use of cinnamaldehyde alone and in combination with other natural antimicrobials and medicinal antibiotics to help prevent and treat food animal and human diseases.
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Affiliation(s)
- Mendel Friedman
- Healthy Processed Foods Research, Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture , Albany, California 94710, United States
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