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Article ; Online: Surfactin inhibits the growth of Propionibacterium acnes by destroying the cell wall and membrane.

Shan, M Y / Meng, F Q / Zhou, L B / Lu, F X / Bie, X M / Zhao, H Z / Lu, Z X

2021 Volume 73, Issue 6, Page(s) 684–693

Abstract: Propionibacterium acnes plays a major role in acne vulgaris. In the pre-experiment, the growth of P. acnes was inhibited effectively using surfactin; however, the antibacterial mechanism has not been described. Therefore, the aim of this study was to ... ...

Abstract	Propionibacterium acnes plays a major role in acne vulgaris. In the pre-experiment, the growth of P. acnes was inhibited effectively using surfactin; however, the antibacterial mechanism has not been described. Therefore, the aim of this study was to evaluate antibacterial activity and analyse the mechanism of surfactin against P. acnes. Minimum inhibitory concentration, time-killing kinetics and scanning electron microscopy were used to evaluate the activity of surfactin against P. acnes, which showed that 128 μg ml
MeSH term(s)	Acne Vulgaris/drug therapy ; Animals ; Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/therapeutic use ; Cell Wall ; Mice ; Microbial Sensitivity Tests ; Propionibacterium acnes
Chemical Substances	Anti-Bacterial Agents
Language	English
Publishing date	2021-10-11
Publishing country	England
Document type	Journal Article
ZDB-ID	632584-1
ISSN	1472-765X ; 0266-8254
ISSN (online)	1472-765X
ISSN	0266-8254
DOI	10.1111/lam.13576
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Article: Surfactin inhibits the growth of Propionibacterium acnes by destroying the cell wall and membrane

Shan, M.Y. / Meng, F.Q. / Zhou, L.B. / Lu, F.X. / Bie, X.M. / Zhao, H.Z. / Lu, Z.X.

Letters in applied microbiology. 2021 Dec., v. 73, no. 6

2021

Abstract: Propionibacterium acnes plays a major role in acne vulgaris. In the pre‐experiment, the growth of P. acnes was inhibited effectively using surfactin; however, the antibacterial mechanism has not been described. Therefore, the aim of this study was to ... ...

Abstract	Propionibacterium acnes plays a major role in acne vulgaris. In the pre‐experiment, the growth of P. acnes was inhibited effectively using surfactin; however, the antibacterial mechanism has not been described. Therefore, the aim of this study was to evaluate antibacterial activity and analyse the mechanism of surfactin against P. acnes. Minimum inhibitory concentration, time‐killing kinetics and scanning electron microscopy were used to evaluate the activity of surfactin against P. acnes, which showed that 128 μg ml⁻¹ effectively inhibited growth. Cell wall permeability was evaluated by detecting the extracellular alkaline phosphatase activity, which increased to 1·83‐ and 2·32‐fold after incubating with 128 and 256 μg ml⁻¹ of surfactin for 10 h, respectively. Propidium iodide fluorescence, leakage of nucleic acid, protein, K⁺, and Ca²⁺, membrane potential and the leakage of calcein from small unilamellar vesicles all increased after incubation with surfactin, indicating that its strong biological activities act mainly by altering membrane integrity. In a mouse model of acne, surfactin significantly reduced P. acnes–induced epidermal swelling and erythema. These results indicate that surfactin effectively inhibited the growth of P. acnes by destroying the cell wall and membrane, and is a potential candidate for acne treatment.
Keywords	acne ; alkaline phosphatase ; antibacterial properties ; calcium ; cell walls ; erythema ; fluorescence ; growth retardation ; membrane potential ; mice ; microbiology ; minimum inhibitory concentration ; nucleic acids ; permeability ; propidium ; surfactin
Language	English
Dates of publication	2021-12
Size	p. 684-693.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	632584-1
ISSN	1472-765X ; 0266-8254
ISSN (online)	1472-765X
ISSN	0266-8254
DOI	10.1111/lam.13576
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Article: Predominate HIV1-specific IgG activity in various mucosal compartments of HIV1-infected individuals.

Lü, F X

Clinical immunology (Orlando, Fla.)

2000 Volume 97, Issue 1, Page(s) 59–68

Abstract: Evaluating mucosal humoral immunity is important for understanding local immunity induced by HIV infection or vaccination and designing prophylactic strategies. To characterize the mucosal humoral immunity following HIV infection, the levels of ... ...

Abstract	Evaluating mucosal humoral immunity is important for understanding local immunity induced by HIV infection or vaccination and designing prophylactic strategies. To characterize the mucosal humoral immunity following HIV infection, the levels of immunoglobulins (Igs), antibodies (Abs), and HIV1-specific Ab activity were evaluated in cervicovaginal secretions (CVS), saliva, breast milk, and sera of HIV-infected individuals. HIV1-specific IgG activity was significantly higher than that of IgA in CVS, saliva, and breast milk. The highest HIV1-specific IgG activity was found in breast milk. The data suggest that anti-HIV1 Abs in CVS were most likely serum derived. However, HIV1-specific Abs in saliva and breast milk were mainly locally produced. The prevalence of HIV1-specific Abs in seropositive subjects was 97% for IgG and 95% for IgA in CVS, 100% for IgG and 80% for IgA in saliva, and 59% for IgG and 94% for IgA in breast milk. These data provide evidence for both a better understanding of the nature of humoral mucosal responses after HIV1 infection and the development of strategies to induce desirable functional mucosal immunity for preventing HIV transmission.
MeSH term(s)	Adolescent ; Adult ; Cervix Mucus/immunology ; Female ; HIV Antibodies/analysis ; HIV Antibodies/blood ; HIV Envelope Protein gp160/analysis ; HIV Envelope Protein gp160/blood ; HIV Infections/immunology ; HIV-1/immunology ; Humans ; Immunity, Mucosal/physiology ; Immunoglobulin A/analysis ; Immunoglobulin Isotypes/analysis ; Middle Aged ; Milk, Human/immunology ; Mucous Membrane/immunology ; Saliva/immunology ; Serum Albumin/analysis ; Vagina/immunology
Chemical Substances	HIV Antibodies ; HIV Envelope Protein gp160 ; Immunoglobulin A ; Immunoglobulin Isotypes ; Serum Albumin
Language	English
Publishing date	2000-10
Publishing country	United States
Document type	Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1459903-x
ISSN	1521-7035 ; 1521-6616
ISSN (online)	1521-7035
ISSN	1521-6616
DOI	10.1006/clim.2000.4910
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Article: New method for quantifying anti-HIV1-gp160 antibodies in saliva, cervicovaginal secretions, and serum of infected women.

Lü, F X

Journal of clinical laboratory analysis

2000 Volume 14, Issue 4, Page(s) 188–192

Abstract: Antibody titers or units as measured by ELISA or similar assays represent only a semi-quantitative measurement of the antibody concentration. In the present study, a truly quantitative assay for evaluating antibody concentrations was developed. In the ... ...

Abstract	Antibody titers or units as measured by ELISA or similar assays represent only a semi-quantitative measurement of the antibody concentration. In the present study, a truly quantitative assay for evaluating antibody concentrations was developed. In the new assay, IgG and IgA antibody concentrations are expressed in absolute gravimetric units (weight/ml) rather than by more ambiguous terms such as titers or units. The procedure is based on the comparison of known concentrations of IgG or IgA bound to anti-F(ab)'(2) with the binding of an unknown concentration of antibodies to a specific antigen. We applied the new assay to the measurement of HIV1-gp160 specific IgG and IgA concentrations in cervicovaginal secretions (CVS), saliva, and sera of infected women. Measurement of antibody activity was obtained by comparing the amount of specific antibodies to the amount of total immunoglobulins found in the same compartment. Because of its quantitative and comparative nature, the assay was named comparative antibody gravimetric evaluation assay (CAGE).
MeSH term(s)	Antibodies, Viral/analysis ; Antibodies, Viral/blood ; Body Fluids/immunology ; Body Fluids/virology ; Cervix Uteri/immunology ; Cervix Uteri/virology ; Female ; HIV Envelope Protein gp160/immunology ; HIV Infections/diagnosis ; HIV Infections/immunology ; HIV-1/immunology ; Humans ; Immunoassay/methods ; Immunoassay/standards ; Immunoglobulin A/analysis ; Immunoglobulin A/blood ; Immunoglobulin A/chemistry ; Immunoglobulin G/analysis ; Immunoglobulin G/blood ; Immunoglobulin G/chemistry ; Molecular Weight ; Reproducibility of Results ; Saliva/immunology ; Saliva/virology ; Sensitivity and Specificity ; Vagina/immunology ; Vagina/virology
Chemical Substances	Antibodies, Viral ; HIV Envelope Protein gp160 ; Immunoglobulin A ; Immunoglobulin G
Language	English
Publishing date	2000
Publishing country	United States
Document type	Journal Article
ZDB-ID	645095-7
ISSN	1098-2825 ; 0887-8013
ISSN (online)	1098-2825
ISSN	0887-8013
DOI	10.1002/1098-2825(2000)14:4<188::aid-jcla8>3.3.co;2-v
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Zs.A 2471: Show issues

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Article: Oral mucosal immunity and HIV/SIV infection.

Lü, F X / Jacobson, R S

Journal of dental research

2007 Volume 86, Issue 3, Page(s) 216–226

Abstract: Human Immunodeficiency Virus (HIV) transmission through genital and rectal mucosa has led to intensive study of mucosal immune responses to HIV and to the development of a vaccine administered locally. However, HIV transmission through the oral mucosa is ...

Abstract	Human Immunodeficiency Virus (HIV) transmission through genital and rectal mucosa has led to intensive study of mucosal immune responses to HIV and to the development of a vaccine administered locally. However, HIV transmission through the oral mucosa is a rare event. The oral mucosa represents a physical barrier and contains immunological elements to prevent the invasion of pathogenic organisms. This particular defense differs between micro-compartments represented by the salivary glands, oral mucosa, and palatine tonsils. Secretory immunity of the salivary glands, unique features of cellular structure in the oral mucosa and palatine tonsils, the high rate of oral blood flow, and innate factors in saliva may all contribute to the resistance to HIV/Simian Immunodeficiency Virus (SIV) oral mucosal infection. In the early stage of HIV infection, humoral and cellular immunity and innate immune functions in oral mucosa are maintained. However, these particular immune responses may all be impaired as a result of chronic HIV infection. A better understanding of oral mucosal immune mechanisms should lead to improved prevention of viral and bacterial infections, particularly in immunocompromised persons with Acquired Immune Deficiency Syndrome (AIDS), and to the development of a novel strategy for a mucosal AIDS vaccine, as well as vaccines to combat other oral diseases, such as dental caries and periodontal diseases.
MeSH term(s)	Animals ; Antibody Formation ; HIV Infections/immunology ; HIV-1/immunology ; HIV-1/pathogenicity ; Haplorhini ; Humans ; Immunity, Mucosal/physiology ; Immunization ; Mouth Mucosa/blood supply ; Mouth Mucosa/immunology ; Palatine Tonsil/immunology ; Saliva/immunology ; Salivary Glands/immunology ; Simian Acquired Immunodeficiency Syndrome/immunology ; Simian Immunodeficiency Virus/immunology ; Simian Immunodeficiency Virus/pathogenicity
Language	English
Publishing date	2007-03
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	80207-4
ISSN	1544-0591 ; 0022-0345
ISSN (online)	1544-0591
ISSN	0022-0345
DOI	10.1177/154405910708600305
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Ul III Zs.75: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular ab Jg. 2022: Lesesaal (EG)
Zs.MO 262: Show issues

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Article ; Online: The effect of three-dimensional conformal radiotherapy on locally recurrent nasopharyngeal carcinoma and on the expression of succinate dehydrogenase B.

Liu, C-X / Wang, H / Qian, X-M / Lu, F-X / Zhuang, S-F / Yang, M-X / Wang, F-L / Wang, Y-T

European review for medical and pharmacological sciences

2016 Volume 20, Issue 23, Page(s) 4852–4857

Abstract: Objective: Investigate the effect of three-dimensional conformal radiotherapy (3DCRT) on locally recurrent nasopharyngeal carcinoma (NPC) on the expression of succinate dehydrogenase B (SDHB).: Patients and methods: Eighty-six patients diagnosed with ...

Abstract	Objective: Investigate the effect of three-dimensional conformal radiotherapy (3DCRT) on locally recurrent nasopharyngeal carcinoma (NPC) on the expression of succinate dehydrogenase B (SDHB). Patients and methods: Eighty-six patients diagnosed with locally recurrent NPC in our hospital were selected and divided into the control group (43 cases) and observation group (43 cases). Conventional two-dimensional radiotherapy was applied in the control group, and 3DCRT was adopted in the observation group. The curative effect of both groups was compared. Results: The effective rate and the degree of alleviation of the observation group were higher than those of the control group, and the differences were statistically significant (p<0.05). There were no differences in the occurrence rate of complications from radiotherapy between the two groups (p>0.05). The survival rate and median survival time of the observation group were significantly higher than those of the control group (p<0.05). The positive expression rate of SDHB in the observation group after radiotherapy was significantly higher than that of the control group (p<0.05), and the median survival time of patients with positive expression of SDHB was significantly higher than patients with negative expression (p<0.05). Conclusions: 3DCRT applied for treatment of locally recurrent NPC was safe and effective. It also improved the positive expression rate of SDHB, which was associated with increased survival time.
MeSH term(s)	Carcinoma/therapy ; Case-Control Studies ; Humans ; Nasopharyngeal Carcinoma ; Nasopharyngeal Neoplasms/therapy ; Radiotherapy, Conformal ; Succinate Dehydrogenase/drug effects ; Succinate Dehydrogenase/metabolism ; Survival Rate
Chemical Substances	SDHD protein, human ; Succinate Dehydrogenase (EC 1.3.99.1)
Language	English
Publishing date	2016-12-15
Publishing country	Italy
Document type	Journal Article
ZDB-ID	605550-3
ISSN	2284-0729 ; 1128-3602 ; 0392-291X
ISSN (online)	2284-0729
ISSN	1128-3602 ; 0392-291X
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Article: [The metabolism and DNA binding of 3H-fusarin C in rats].

Lu, F X

Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae

1990 Volume 12, Issue 3, Page(s) 231–234

Abstract: In this paper, the distribution and elimination of 3H-Fusarin C (3H-FC) in rats and DNA-binding of FC in cultured explants of rat esophagus are reported. The radioactivity distribution in tissues was altered dynamically, and the highest levels of ... ...

Abstract	In this paper, the distribution and elimination of 3H-Fusarin C (3H-FC) in rats and DNA-binding of FC in cultured explants of rat esophagus are reported. The radioactivity distribution in tissues was altered dynamically, and the highest levels of radioactivity were found in the intestine, stomach and liver after giving 3H-FC into the stomachs of rats. Kidney, bladder, esophagus and spleen followed. The radioactivity levels in the lung and brain were low. Radioactivity in the blood reached a peak three hours after giving 3H-FC to rats, but about 50% of the radioactivity remained in the blood even after 24 h. The total urinary excretion of radioactivity in rats was found to be about 30.7% within 48 h, and about 27.8% was present in the feces. Only 5.4% unchanged FC was excreted in the urine, while other metabolites of FC accounted for 94.6% of total urinary radioactivity. DNA-binding of FC occurred in rat esophageal explants.
MeSH term(s)	Animals ; DNA/metabolism ; Esophagus/metabolism ; Male ; Polyenes/metabolism ; Polyenes/pharmacokinetics ; Rats ; Rats, Inbred Strains ; Tissue Distribution
Chemical Substances	Polyenes ; DNA (9007-49-2) ; fusarin C (C3F3Z00LM3)
Language	Chinese
Publishing date	1990-06
Publishing country	China
Document type	Journal Article
ZDB-ID	604853-5
ISSN	1000-503X
ISSN	1000-503X
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Article: [Echocardiographic observation of cardiac change in 42 cases of myxedema].

Lu, F X

Zhonghua nei ke za zhi

1982 Volume 21, Issue 5, Page(s) 292–294

MeSH term(s)	Adult ; Aged ; Cardiomegaly/diagnosis ; Coronary Disease/diagnosis ; Echocardiography ; Female ; Heart Diseases/diagnosis ; Heart Diseases/etiology ; Humans ; Male ; Middle Aged ; Myxedema/complications ; Pericardial Effusion/diagnosis
Language	Chinese
Publishing date	1982-05
Publishing country	China
Document type	Journal Article
ZDB-ID	754223-9
ISSN	0578-1426
ISSN	0578-1426
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Zs.A 1620: Show issues

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Article: Isolation, structural identification, and characterization of a mutagen from Fusarium moniliforme.

Lu, F X / Jeffrey, A M

Chemical research in toxicology

1993 Volume 6, Issue 1, Page(s) 91–96

Abstract: Strains of Fusarium moniliforme produce a variety of toxins, including several uncharacterized mutagens that act directly in the Ames assay using Salmonella typhimurium, strain TA 100. The Ames assay was used to monitor isolation of the direct-acting ... ...

Abstract	Strains of Fusarium moniliforme produce a variety of toxins, including several uncharacterized mutagens that act directly in the Ames assay using Salmonella typhimurium, strain TA 100. The Ames assay was used to monitor isolation of the direct-acting mutagens from the F. moniliforme culture extracts. Seven strains were tested, of which strains F07 and F84 contained the highest levels of direct-acting mutagens. Extracts of strain F84 were fractionated on a silica gel column, eluted with methanol-chloroform (1:9). This fraction was then separated on a reverse-phase, C-18 column with 50% methanol in water as eluant and further purified by TLC. One compound was isolated and given the trivial name fusarin X (FX). Its structure was determined from its UV (lambda max 357 nm), 500-MHz NMR, and mass spectra, and those of its diacetate, to be the 1-hydroxy analog of the previously characterized fusarin C. FX was present in culture extracts of strains F07 and F84 at 83 and 8 micrograms/g, respectively, which was proportional to their relative mutagenicities. It was not detected in the other strains tested. Since exposure of FX most likely occurs in cooked corn, its thermal stability was measured; it, like FC, decomposes at 100 degrees C, especially at high pH. Again, in common with FC, it was decomposed by GSH. The possible role of these Fusarium metabolites in the etiology of human cancers has still to be resolved.
MeSH term(s)	Acetylation ; Animals ; Fusarium/chemistry ; Glutathione/chemistry ; Hydrogen-Ion Concentration ; Hydrolysis ; In Vitro Techniques ; Lactams/chemistry ; Lactams/isolation & purification ; Lactams/toxicity ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Models, Molecular ; Molecular Conformation ; Mutagenicity Tests ; Mutagens/chemistry ; Mutagens/isolation & purification ; Mutagens/toxicity ; Polyenes/isolation & purification ; Polyenes/toxicity ; Rats ; Spectrophotometry, Ultraviolet ; Temperature
Chemical Substances	Lactams ; Mutagens ; Polyenes ; fusarin X (145569-98-8) ; fusarin C (C3F3Z00LM3) ; Glutathione (GAN16C9B8O)
Language	English
Publishing date	1993-01
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	639353-6
ISSN	1520-5010 ; 0893-228X
ISSN (online)	1520-5010
ISSN	0893-228X
DOI	10.1021/tx00031a014
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Article: Predictive modeling and growth models of aerobic mesophilic bacteria on fresh-cut lettuce by hypochlorite-washing

Lu, Z.X / Lu, F.X / Zhang, Li-Kui / Bie, Xiao-Mei / Zou, Xiao-Kui

Journal of food safety. 2007 May, v. 27, no. 2

2007

Abstract: Response surface methodology was used to evaluate the effect of three selected factors (chlorine concentration, washing time and water-to-lettuce ratio) on reducing aerobic mesophilic bacteria on fresh-cut lettuce. According to statistical analysis, the ... ...

Abstract	Response surface methodology was used to evaluate the effect of three selected factors (chlorine concentration, washing time and water-to-lettuce ratio) on reducing aerobic mesophilic bacteria on fresh-cut lettuce. According to statistical analysis, the model established was effective in predicting the reduction of aerobic mesophilic bacteria on fresh-cut lettuce by washing with chlorine. In addition, best-fit Gompertz-modified models were described to evaluate aerobic mesophilic bacteria growth on fresh-cut lettuce during storage at 0, 4 and 25C, respectively. The final load of aerobic mesophilic bacteria and shelf life of fresh-cut lettuce could be predicted in various storing temperatures with the growth models.
Keywords	lettuce ; fresh-cut foods ; sanitizing ; decontamination ; washing ; sodium hypochlorite ; antibacterial properties ; bacterial contamination ; aerobes ; microbial load ; food pathogens ; food contamination ; food storage ; storage temperature ; predictive microbiology ; response surface methodology ; microbial growth ; mathematical models
Language	English
Dates of publication	2007-05
Size	p. 157-168.
Publisher	Blackwell Publishing Inc
Publishing place	Malden, USA
Document type	Article
ZDB-ID	756159-3
ISSN	1745-4565 ; 0149-6085
ISSN (online)	1745-4565
ISSN	0149-6085
DOI	10.1111/j.1745-4565.2007.00069.x
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