3/20/2019

Interference With Cell-to-cell Signaling: a Potential Therapeutic Approach Against Vibrio Species 

Vijaya baskar .P 1* AND Veera ravi.A 2 1. Department of biotechnology Dr. G.R.D.C.S, Coimbatore. 2. Department of biotechnology, Alagappa University, karaikudi.


Dekievit, T. R., and B. H. Iglewski. 2000. Bacterial quorum sensing in pathogenic relationships. Infect. Immun. 66: 4839-4849. Dimango, E., H. J. Zar, R. Bryan, and A. Prince. 1995. Diverse Pseudomonas aerugniosa gene products stimulate respiratory epithelial cells to produce interleukin-8. J. Clin-lnvestig. 96: 2204-2210.
 




It was at the spur of the moment that we ventured to write something about pheromone attraction. Such is the amount of matter that is available on pheromone attraction.

You must be one with your quest, your ardent dream. There can be no separation between it and you; none whatsoever between life and Hero Quest. The perilous journey IS life. It is the arduous journey, the heroic tasks you must conquer to have it. Or you will not have life at all.

We suggest that the above said mechanisms in Pseudomonas with quorum sensing principle might have occurred in the present study also. This induces the bacteria Pseudomonas in epibiotic seaweeds to secrete certain active compound against to the competitor Vibrio species.

Pursuing the Scent of the Sleeping Lover So, the Hero who seeks to awaken the soul of the Lover must be well prepared. You must prepare your body for the rigors of prolonged loving. You must prepare your soul to reveal all, to give all, to allow it to be encircled. To be consumed again and again. This is the champion's quest, to prepare for a life of giving. To clear your mind of every obstacle, to rid your life of every hindrance, to tirelessly, single-mindedly pursue the scent of the sleeping Lover until you are lip-to-lip.

Bassler, B. L., E. P. Greenberg, and A. M. Sterens. 1997. Cross species induction of luminescence in the quorum - sensing bacterium Vibrio harveyi. J. Bacteriology. 179: 4043-4045.

This experiment does not showed any inhibition zones Bacterial identification The 3 producer and 3 inducer strains which were responded the quorum sensing principles alone were subjected to biochemical analysis for identification. The obtained results revealed that all the producer strains showed sings of Pseudomonas sps and the inducer strains showed signs of Vibrio sps. So, based on the obtained result all the producer strains seems to be a Pseudomonas sps where as all the Inducer strain belongs to the genus vibrio.

Awaken The Lover Who awakens the soul of the Lover? Who has the magic potion to open her eyes wide and seek her consuming embrace? What first put the Lover to sleep? Where was the magic potion hidden? Who chose this Hero to apply it?

GcD- GcE- GcF- NIL NIL 26 NIL NIL NIL Ulva lactuca 13. U1+ 14: U2+ 15. U3+ 16. U4+ U1-

Scent of Eros


This product contains androstenol and androsterone. It is popular among younger people. Androstenol is a unisex pheromone that signals youth and it is useful for breaking the ice and getting conversations going. Androsterone is a masculine pheromone. Some people say that Scent of Eros can only get you friends, but this depends on your attitude and the way you use it.

Liming, Y., G. K. Boyd, and J. G. Burgess. 2002. Surface induced attachment induced production of Antimicrobial compounds by marine epibiotic Bacteria using modified Roller Bottle. Mar. Biotechnology. 4: 356 - 366.

A. Live cells of producer and inducer strains B. Live cells of producer strain alone C. Live cells of inducer strain alone In culture system A 200ul of 16 hours old broth culture of both producer and inducer strains were added to the 15 ml of nutrient broth.

Table 2: The results of Quorum Sensing analysis of epibiotic bacterial isolates from seaweeds. Seaweed sample Producer organism Inducer organism Cross-species producer with inducer Cross-species supernatant test with inducer Zone of clearance (mm)

Liquid Trust Liquid Trust contains oxytocin - hormone that controls the level of trust in people. Oxytocin makes people more willing to bond with others. Liquid Trust Body Spray is created to increase trust in the wearer. This product is applied every morning after showering along with a favorite cologne or perfume.

Mckenney, D., K. E. Brown, and D. G. Allison. 1995. Influence of Pseudomonas aeruginosa exoproducts on virulence factor production in Burkholderia cepacia: evidence of interspecies communication. J. Bacterial 177: 6989 - 6992.

TEST ORGANISMS: 1. Epiphytic Vibrio from seaweeds 2. Vibrio from primary film 3. Vibrio from Sediments 4. Pathogenic bacteria such as Escherichia coli, Staphylococcus aureus, Salmonella sp. and Proteus sp

The collected seaweed samples were thoroughly washed with sterile seawater to removes the loosely attached bacteria/particles. Seaweed fronds were scrubbed with sterile cotton swabs to obtain epiphytic bacteria. Epiphytic bacterial organism in the swab were inoculated in sterile peptone broth (50% sea water) and incubated at 28??C in an incubated shaker (220 rpm / min) for overnight. After the incubation period the enriched cultures were serially diluted up to 10-8 concentration and 200 microlitre of each diluted samples were transferred into the nutrient agar plate (50% sea water). The plates were incubated at 28??C for 5 days and the plates with crowded colonies were selected. In the crowded plates those colonies, which showed the sign of inhibition zone around its margin to the neighboring colony, were selected and considered as producer strain. The neighboring sensitive colonies were treated as inducer strain. Both producer and inducer strains were streaked repeatedly until to get pure culture. The pure culture were properly labeled and subjected to the quorum sensing analysis.

Liming, Y., K. G. Boyd, and D. R. Adams. 2003. Biofilm specific cross species induction of antimicrobial compounds in Bacilli. AppI.Envi.Microbiol, 69:3719-3727.

CONCLUSION: The present investigation was aimed to study the quorum sensing principle among seaweed epibiotic bacterial organisms. In the past few decades there was no findings of new novel antibacterial class compounds were identified. But, the pathogenic microorganisms show much higher rate of resistant development even to the potential antibiotics. So, there is an urgent need to discover new novel antibiotic compounds. The marine inhabitants such as microorganisms, seaweeds, invertebrates, etc., act as an undepleted source of wide range of natural products among which the seaweeds act as a potential source of antibiotic compounds. Currently the cross species induction / quorum sensing attracts the total attention of researchers in finding new novel drugs against multidrug resistant pathogenic microorganisms. So, the present study aim to find out the capability of seaweed epibiotic bacterial organisms to produce novel drugs against the animal and plant pathogens

Dictyota batryensis Phaeophyceae Sargassum sps Phaeophyceae Hypnea musciformis Rhodophyceae Acanthophora dendroides Rhodophyceae Jania rubens Rhodophyceae

Caulerpa racemosa Chlorophyceae Dictyota dichotoma Phaeophyceae Turbinaria ornata Phaeophyceae Padina gymnospora Phaeophyceae Sargassum cinearifolium Phaeophyceae

New Pheromone Additive (NPA) NPA is one of the most effective pheromone products on the market. It should to be added to favorite colognes or after shaves because it is very concentrated. NPA contains androstenone. It has an unpleasant pheromone smell. Recommended for more experienced users.

Ines, M. M., B. Karaigher, U. Cepon, and I. Mahne. 2003. Variability of the Quorum sensing system in natural isolates of Bacillus sp., Food technol. Biotechnol. 41: 23 - 28.

Strip away the allusions to sensuality in these old stories. They are the stories of the culmination of the Hero Quest. So, listen carefully and hear your quest, your future revealed herein.

Trischman, J.A., D.M.Tapiolas, P.R.Jensen, R.Dwight, W.Fenical, T.C.Mckee, C.M.Ireland, T.J.Stout, J.CIarely. 1994. Salinamide - A and salinamide - B - anti -inflammatory depsipeptides from a marine streptomycete. J.Am.Chem.Soc. 116: 757 -758.

Holmstrom, C, D. Rittschof, and S. Kjelleberg. 1992. Inhibition of settlement by larvae of Balanus amphitrite by a surface - colonizing marine bacterium. Appl. Env. Microbiol. 58: 2111 -2115.

Burgess, J. G., M. Elizabeth, M. Bregu, A. Meams-Sprugg, and K. G. Boyd. 1999 Microbial antagonism: a neglected avenue of natural products research. J. Biotechnology. 70. 27-32.

REFERENCES Alim, I., and K. Yuto. 2003. Mc21-A, a Bacteriocidal antibiotic produced by a new marine bacterium, Pseudoalteromonas phenotica sp. nov. O-Bc 30T, against Methicillin -Resistant Staphylococcus aureus. Antimicro. Agents Chemoth. 47: 480 - 488.

All the cultures were incubated at 28??C for 5 days. After the incubation period the cultures were centrifuged at 10,000 rpm for 15mins. The supernatant was collected and subjected to antibacterial assay with respective inducer strain.

A sleeping Lover lays at the core of many timeless legends. A kiss, or magic potion is needed to awaken her. To grasp the eternal truths displayed so beautifully in these old texts, you need only to see it is not a story. It is instruction to you. It is your guide, your encouragement, your path to be a Hero.

Whiteley, M., K.M.Lee, and E.P.Greenberg.1999. Identification of genes controlled by quorum sensing in Pseudomonas aeruginosa. Proc.Natl.Acad.Sci.USA.96:13904-13909.

The citrus family of perfumes is, as expected, a fruity scent derived from natural fruit oils. Pomello and lemon and orange and even grapefruit are among the most popular bases for citrus perfumes. Typically younger individuals prefer the citrus based over most other fragrances.

Mearns - Spragg, A., K. G. Boyd, and M. O. Hubble. 1997. Antibiotics from surface associated marine bacteria. Proceedings of the fourth underwater science symposium. The society for underwater Technology, London: 147 - 157.

U2- U3- U4- U1+/U1- U2+/U2- U3+/U3- U4+/U4- U1- U2- U3- U4- NIL NIL NIL NIL Sediment 17. SA+ SA- SA+/SA- SA- 28

Microdictyon tenunis Chlorophyceae Chondrococcus hornemonii Chlorophyceae Enteromorpha intestinalis Chlorophyceae Caulerpa cupressoides Chlorophyceae

In gram positive bacteria peptide and derivative peptide based signaling molecules seem to be the predominant mode of communication. During high cell density the marine bacteria can produce enzymes, surfactants, toxins, and antibiotics by the chemical signal communication. Marine epibiotic bacteria are also known to produce compounds active against drug resistant hospital pathogen by the cross species induction method. Building on assays described by Austin (Billaud and Austin 1990) a screening procedure has been developed in which marine bacteria are challenged by exposing them to terrestrial bacteria prior to assay of antimicrobial compounds. Hence in this present investigation it is proposed to find out the ability of sea weed epibiotic bacterial organism to produce antibacterial compounds through quorum sensing.

It was at the spur of the moment that we ventured to write something about pheromone attraction. Such is the amount of matter that is available on pheromone attraction.



Icebreaker Pheromone Cologne



The woody fragrances are somewhat similar to the leathers, but with a more outdoor smell. With a scent that very closely matches that of the smell of burning wood, Sandalwood is the most popular of the woody fragrances. Sandalwood is popular for perfumes as well as fragrance oils and even incense.

Chypre is another popular blend, typically a soft aroma of outdoor woody-leather scents mixed with citrus aromas. These blends are typically easy to spot when shopping as they are almost always encased in leather as a protective covering. The mixing of fragrances has shifted toward the fruity or "green" scents and leaves behind a gentle musk.

*Corresponding author e-mail: vijay10bas@yahoo.co.in INTRODUCTION We are living in a microbial planet. About 71 % of the surface of this planet is covered by sea water. A typical milliliter of seawater contains 103 fungal cells, 106 bacteria, and 107 viruses, including pathogens that cause widespread mortalities and microbes that initiate fouling of host surfaces (Rheinheimer, 1992). Thus, marine plants and animals are continually exposed to high concentrations of potentially harmful microbes. These microorganisms in nature exists as free living planktonic mode of life in sea water or it may exist as epibiotic organisms in various living and nonliving surfaces. Among living organisms, seaweeds and invertebrates act as suitable substrate for the establishment of epibiotic organisms Seaweeds are known to release a large amount of organic carbon into the surrounding environment providing a nutrient rich habitat for microorganisms like bacteria. Bacteria are generally considered to be independent unicellular organisms. One cell accomplishes all of the tasks of feeding, locomotion, 'reproduction, respiration and all other processes necessary to keep an organism alive. There are several classes of bacteria such as primary film forming bacteria, sediment bacteria, symbiotic bacteria, and epibiotic bacteria in various aquatic organisms. The marine surface environment is a site of intense composition for living space by a wide variety of organisms. Bacteria are generally recognized as primary colonizers of this habitat and are able to form biofilm on marine surface such as invertebrates and algae (Bryers, et al., 1982). Bacteria may also be abundant on the surfaces of some algae as an important epibiotic organism. In many cases, the bacterial population found to be specific, with changes occurring throughout the year or life span of the algal surface. This algal-bacterial relationship is symbiotic in most cases; the epibiotic bacteria in seaweed play a protective role by releasing secondary metabolites into the surrounding seawater that help preventing extensive fouling of the surface. Epibiotic bacteria are therefore attracting attention as a source of new natural products. Bacteria from the larvae of some crustaceans protect them from fungal infection by the production of simple antimicrobial compounds. Bacteria isolated from the surface of a tunicate prevented the settlement of barnacle and tunicate larvae exposed to the bacteria as biofilm in petridishes (Evelyn et al., 2001).

Armstrong, E., J. D. Mckenzie, and G.T. G. Worthy. 1999. Aquaculture of sponges on scallops for natural products research and antifouling. J. Biotechnol. 70: 163-174. 70. 21-

In concluding this discussion, the quorum sensing is wider spread among bacterial population then was previously thought, (In Gram positive, Gram negative bacterial communication). Current assays for antimicrobial activities are inadequate because some antibiotic producing bacteria may require the presence of another bacterial species. These findings have important implication for the discovery of novel antimicrobial compounds from marine bacteria and may allow the development of new methods for screening novel compounds active against multidrug resistant bacteria.

Evelyn, A., Y. Liming, K.G. Boyd, P. C. Wright, and J. G. Burgess. 2001. The symbiotic role of marine microbes on living surfaces. Hydrobiologia. 461: 37 - 40

The results of Vanderivere and Kirchman 1993 suggest that the addition of increased surface by adding sand will induce the exopolymer synthesis through the high cell density dependent system. In the same way the bacterial organisms attached to the surface of seaweed shows alteration of genes expression may be due to the response to the high competitive environment. When cell density increases the competition for space and nutrients are also increased. So the existing bacteria were forced to protect themselves in this competitive environment. Normally in this condition the bacteria will be activated to induce the expression of certain hidden genes in genetic material through quorum sensing. The quorum sensing is principles were active compounds (autoinducer) from bacterial cell will promote the expression of a particular hidden gene of other bacterial organism in a stressed condition.

The Hero she seeks must prepare himself for her awakening long before the opportunity to win her wafts into the air. It is not his fortune that she seeks. It is not his beauty - for her Hero, her champion, will always be beautiful to her, no matter his visage. It is not his courage to best all in his quest to find her that underlies her dormant love.

Br B+ /Br B- Br C+/Br C- Br D+/Br D- Br E+/Br E- Br F+/Br F- BrA- Br B- BrC- BrD- BrE- BrF- NIL 39

Cappuccino J. G., and N. Shermann. 1999. Microbiology, A Laboratory manual, Fourth edition, Addison Wesley, New York. Davies, D. G., M. R. Parsek, J. P. Pearson, B. H. Iglewski, J. W. Costerton, and E. P. Greenberg. 1998. The involvement of cell to cell signals in the development of a bacterial biofilm. Science. 280: 295-298.

b) Among these 17-inducer strain 6 strains were isolated from Hypnea musiformis, 6 from Gracillaria edulis, 4 from Ulva lactuca & 1 from sediment.

EXPERIMENT NUMBER 2 In this experiment, culture supernatant was obtained as per the procedure given in the experiment 1. 50ml of supernatant was mixed with equal volume of 80% methanol and 1% acetic acid mixture and it was shaked thoroughly in a separating funnel. Finally the methanol and acetic acid fractions were collected and concentrated by evaporation using water bath at 55??C. The viscous colloidal residues were resuspended in 600 microlitre of 50% methanol and it was used for antibacterial assay against different test organism.

Bassler, B.L.1999. Curr.Opin.Microbiol.2: 582-587.* Bernan, V. S., M. Greenstein, and W. M. Maiese. 1997. Marine microorganisms as a source of new natural products. Adv. Appl. Microbiol. 43: 57 - 89.

Miller, M. B., and B. L. Bassler. 2001. Quorum sensing in bacteria. Annu. Rev. Microbiol. 55: 165-199. Msadek, T. 1999. When the going gets tough: survival strategies and environmental signaling network in Bacillus subtilis. Trends Microbiol. 7: 201-207.

No, it is only that her Hero sees in her beautiful sleep what no others can see. It is your ability to follow the lead of her loving fragrance, and count all the challenges to kiss her as mere distractions and delays until you can lay your lips upon hers and pull her to full awareness. It is this enduring quality that she seeks, because she intends to love you long, and love you well, and nothing short of this will enable you to stay the course and give her all she desires. For want of this, she chooses to sleep, resting her energies for the passionate embrace she intends to fill her lifetime. Is there any other reason to stay awake?

Burgess, J. G., H. Miyashita, H. Sudo, and T. Matsunaga.1991. Antibiotic production by marine photosynthetic bacterium Chromatium purpuratum NKPB 031704: Localization of activity to the chromatophores. FEMS Microbiol. Lett. 84: 301 - 306.

Are you ready to awaken the soul of the sleeping lover? Next Week: The True Identity of the Lasting Hero If you would like to pre-register for a copy of Boyd's upcoming book, "The Hero Quest", send us an email here.

MATERIALS AND METHODS: SAMPLE COLLECTION: Seaweed samples were collected from Gulf of Mannar Marine Biosphere Reserve and identified up to species level by using CMFRI bulletin (14) as follows:

The earlier genetic analysis in Pseudomonas reveals the Pseudomonas consist of two quorum sensing systems as Las R1-I and Rh1R-l and have linked with R and I genes, in addition recently a third Lux R homolog that is advanced to a cluster of quorum sensing - controlled (qsc) genes were detected. Las R is a transcriptional regulator that responses primarily to the Las I - generated signal and Rh1R is a transcriptional regularly that responses best to the Rhl -generated signal. In Pseudomonas auriginosa, at low population densities Las I produce a basel level of 3-O-C12-HSL. As density increases, 3-0-C12-HSL builds to a critical concentration, at which point interacts with LasR. This Las R -3-0-012-HSL complex that activates transcription of a number of genes [Whileley, et al., 1999].


?? 2007 Boyd L. Jentzsch



There is significant matter enclosed in this article about pheromone attraction for you to understand pheromone attraction better. Use it to itÂ’s best.
Author Dave Thomson
 
 
 


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