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.

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.

Having been given the assignment of writing an interesting presentation on npap heromones, this is what we came up with. Just hope you find it interesting too!

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

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.

Starch hydrolysis test, Protein hydrolysis test, Lipid hydrolysis test, Oxidative / Fermentative test, Salt concentration (0%, 3%, 5%, 7%, 10%), TCBS, Growth in Temperature, 42??C and 47??C

NIL NIL NIL NIL Gracillaria edulis 7. GcA+ 8. GcB+ 9. GcC+ 10. GcD+ 11. GcE+ 12. GcF+ GcA- GcB-

Anyway, what caught my attention was this test they did on pheromones, a known aphrodisiac scent. The test included a very sexy woman who was blindfolded. She then had to 'smell' three men and decide who she wants to date that night. The goal of the test was to determine if indeed pheromones will work.

So what do you do? Put some relaxing scents on first like almond oil or rose. Once she's had a whiff of these scents and begins to relax, she'll be more open to idea of having sex with you.

So don't completely disregard the power of scents as an aphrodisiac. Just don't choose one that's pheromones-based! How to Use the Power of Scent If you want to aid your sexual appeal with scents, then I suggest you pay close attention to what your woman likes. For example, if she's into lavender and vanilla-scents then go for an aftershave with a tinge of these scents. You can also light some vanilla candles or put some lavender oil on a scent burner so that your living room (or any room for that matter) brings her to a sexy state right away.

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

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.

a) Among these 17 producers strain 6 strains were isolated from Hypnea musiformis. 6 from Gracillaria edulis, 4 from Ulva lactuca & 1 from Sediment.

RESULTS AND DISCUSSION: QUORUM SENSING/CROSS SPECIES INDUCTION ANALYSIS In the present investigation totally 54 isolates were collected out of seaweed species. Among 54 isolates, 17 of them are producer strain, another 17 are the inducer strain rest of 20 isolates is normal and not showing any signs of activity (Table.2).

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

Korber, D. R., J. R.Lawrence, H. M. Lappin-scott, and J. W. Costerton. 1995. Growth of microorganisms on surfaces. In. Microbial. Biofilm, Lapp in - Scott. Cambridge, UK: Cambridge university press.

In this experiment among 17 Producer and Inducer strains only 3 of them have responded to the quorum sensing principle. (BrB+/BrB-), (GcC+/GcC) and (SA+/SA-)

U1+, U2+, U3+, U4+ Ulva lactuca SA+ Sediment INDUCER STRAIN BrA-, BrB-, BrC-, BrD-, BrE-, BrF- Hypnea musiformis

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

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.

In the gram negative bacteria AHSL is an active principle of quorum sensing. Our producer strain is also been identified as Pseudomonas sps. So in these organisms also active principle must falls under the AHSL. The cell-cell signaling mechanism can either require import of the signal and subsequent interaction with intracellular effectors or a two-component signaling system that transducers the information across the membrane. In V. harveyi genetic analysis of the density sensing apparatus has two independent density-sensing systems, and each is composed of a sensor-auto inducer pair; system one is composed of sensor I and Al -1, and system two is composed of sensor 2 and AI-2. The two densities - sensing system are redundant, because a null mutation in either system alone results in expression of hidden genes (Bassler, et al.,1999.).

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.

Hypnea musiformis 1. BrA+ 2. BrB+ 3. BrC+ 4. BrD+ 5. BrE+ 6. BrF+ BrA- BrB- BrC- BrD- BrE- BrF- Br A+ /Br A-

A small percent of humans have fully mastered the art of seduction and have become extremely successful not only in relationships but in business as well; that is why seduction doesn't only involve a set of skills it can change someone's life entirely. We have established that people act on emotions and that is precisely why businesses rely on this basic method to advertise and market their products to people. Think about it, would you buy a car because of the "brand"? or because you know that if you have a car in particular you will more likely to "impress" someone of the opposite sex, thus earning you better odds to "get lucky"

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.

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

If we think hard about it, man is driven by emotions and those strong emotions trigger certain physical responses. If we think in terms of basic instincts, we, as human beings only differ from animals by our cognitive ability everything else is ruled by our primitive brain, that is why in the game of "seduction" our basic instincts kick in. Instincts are simply "hard-coded programs" in our brain which serve important functions such as: survival, reproduction, etc. Since they are already in our brain we do not need to learn them, a good example of basic instincts can be seen in normal animal behavior and fixed action patterns.

Colony morphology, Gram staining, Motility test, Oxidase test, Catalase test, Indole Production, Methyl red test, Voges Proskauer test, Citrate Utilization test, Triple sugar Iron test, Nitrate reduction test, Lactose fermentation, Urease test

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

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

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.

ABSTRACT Bacterial biofilms are sessile communities with high cell density that are ubiquitous in natural, medical, and engineering environments; they are fascinating since they are primitive tissues with an advanced chemical communications network. Currently, there is an explosive amount of biofilm research, most of it with the ultimate aims of biofilm prevention, control, or eradication.The present investigation was aimed to study the cell signaling principle among seaweed epibiotic bacterial organisms , totally 54 bacterial isolates were made out of 20 seaweed species. Among 54 bacterial isolates 17 of them producer, another 17 of them inducer strains rest of 20 isolates were normal that have not showing any signs of activity. The 17 producers and 17 inducer strains were subjected to the cross species induction by quorum sensing principle and found that only 3 of them have responded to the cross species induction in production of antibacterial compound against the respective inducer strains. All the 3 producers and inducer were identified by biochemical analysis and surprisingly that all the 3 producer strain belongs to Genus Pseudomonas and inducer strains were belongs to Genus Vibrio. The supernatant obtain from mixed culture of Pseudomonas & Vibrio shows the antibiotic activity against the various Vibrio species which were isolated from other sources. Such as Vibrio from primary film, Vibrio from sediment Vibrio from seaweeds epibiotics. The obtain results clearly shows the particular Pseudomonas from seaweed epibionts has the capability of producing potential antibiotic compound against wide range of Vibrio species through quorum sensing.

Having been given the assignment of writing an interesting presentation on npap heromones, this is what we came up with. Just hope you find it interesting too!

Icebreaker Pheromone Cologne

Well, that may seem a lone way off yet so for now, if you see someone nursing or know of a relative who is, better get your woman near her!

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.

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.

Allison, D. G., B. Ruiz, C. Sanjose, A. Jaspe, and P.Gilbert. 1998. Extracellular products as mediators of the formation and detachment of Pseudomonas fluorescens biofilms. FEMS Microbial Lett. 167: 179-184.

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.

Patterson, G. L., and C. Ml. Bolis. 1997. Fungal cell - wall poly sacchraides elicit an antifungal secondary metabolite in the Cyanobacterium Scytonema ocellatum. J. Phycology. 33: 54 - 60.

Boyd, K.G., A. Mearns -Soragg, G. Briedley, K. Hatzidimitriou, A. Rennie, M. Bregu, M. 0. Hubble, and J. G. Burgess. 1998. Antifouling potential of epiphytic marine bacteria from the surface of marine algae. Plouzane, France: 128 -136.

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.

Is there a difference between pheromone perfume and cologne? What should you consider when shopping for human pheromone products? There really isn't any difference at all. Cologne is generally targeted towards men while perfume is basically a woman's product. It's simply marketing as women would identify much more with pheromone perfume.

QUORUM SENSING EXPERIMENT NUMBER 1 In this present study, the producer and inducer strains were cross reacted to find out the production of antibiotic compound through quorum sensing. Totally three set of cultures were maintained as follows (along with one as control).

Spray and concentrate products then complete the manor in which pheromones are made available to the public. For women though, it seems manufacturers are starting to realize they may have been leaving money on the table when they first began their quest to turn the human population into attraction magnets.

Androstenol Is Queen The pheromone used in perfume products for women is androstenol. It's the female equivalent of the version androstenone. It's said when men sense androstenol in the air, it's every guy for himself. It's what can turn a mild mannered guy into either a welcome serenader or a pain in the...!

Bainton, N. J., P. Stead, and S.R. Chhabra. 1992. N-(3-oxohexanoyl)-L-homoserine Lactone regulated carbapenem antiobiotic production in Erwinia carotovora. Biochem. J. 288: 997-1004.

All the 17 strains were named as PRODUCERS STAINS BrA+, BrB+, BrC+, BrD+, BrE+, BrF+ Hypnea musiformis GcA+, GcB+, GcC+, GcD+, GcE+, GcF+ Gracillaria edulis

In the present investigation, it was aimed to produce the antibiotics from the seaweed epibionts through quorum sensing principle. The bacterial isolates of seaweed epibionts were identified as species of Pseudomonas and Vibrio from seaweeds Hypnea musiformis and Gracillaria edulis. In this study the Pseudomonas acts as a producer strain and Vibrio as inducer strain. The recent finding says that the seaweed epibionts having potential to control the metabolic activity of competitor organisms. Allison et al., 1998 reported that many bacterial strains up on attaching to a surface produce exopolysaccharides or exopolypeptides. In addition, it has been postulated that exopolysaccharides could mediate the attachment of the bacteria to the surface and induce metabolic changes.

Bryers, J. D., and W. G. Characklis. 1982. Processes governing primary biofilm formation. Bioeng. 24: 2451-2476 Burgess, J. G., K. Boyd, E. Armstrong, T. Pisacane, and D. R. Adams. 2003. The development of a marine natural product-based antifouling paint. Biofouling. 19: 197 -205.

The Power Of Androstenol Androstenol is said to have the power to turn a man into a woman's slave; they will become more receptive to your needs. Now that's every woman's dream. Imagine, that pile of uncut firewood in the backyard or the unmowed grass which has been put on hold during football season.

Table 1. List of Seaweeds species collected for the present study SPECIES NAME FAMILY Halimeda gracilis Chlorophyceae Ulva lactuca 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.

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.

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.

And here's another thing you can do: bake pumpkin pie! According to research, the smell of pumpkin pie increases blood flow to a woman's vagina. Don't know how to make pumpkin pie? Just buy a ready-made one and put it in the oven just before your woman arrives. This will make the whole room (or house) smell like pumpkin pie and this will help her get the 'juices' flowing!

In this present work the totally 54 isolates were screened from 20 different seaweed species out of which 34 species were showed the signs of quorum sensing i.e. 17 producer and 17 inducer strains, but when these organisms where subjected to quorum sensing principle in mixed culture only 3 them have responded. So the present study reveals around 17% of bacterial species isolated from seaweeds and sediment were responded to quorum sensing. According to the results of bacteria isolated from marine algae surfaces indicated that the incidence of antibiotic producing strains from this habitat was 20% where as that from sea water was only a few percent. In the present study also reveals more or less the same ratio in Pseudomonas spp. was observed. Our results also reveals a results of Kell et al., 1995; Stead et al., 1996; they have said the culture supernatant of Pseudomonas sps known to contain AHLS which induces the production of phenazine antibiotics. In this investigation due to time constraint, It was not attempted to identify the active compound secreted by Pseudomonas through quorum sensing, which may leave the space for the further intensive research in future.

Imagine ladies, just a dab of pheromone perfume and you can put your man under your spell. You'll be the envy of every female in your own imaginary Wisteria Lane!

The art of seduction is a topic which has been studied since ancient times, the attraction between man and woman (etc.!) seems to drive people regardless of their intellectual state. Societies and even empires have been ruled by "desire" a clear example was Babylon which as we all know was famous for their, shall we say "sexy parties".

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-

Yotsu, T., Y.Meguro, A. Endo, M. Murate, H. Naold, and T. Yasumoto.1987. Production of tetrodotoxin and its derivatives by Pseudomonas sp. Toxicon 25: 225 - 228

ANTIBIOTIC ASSAYS Antibiotic activity was performed in duplicate using a standard paper disc diffusion method as well as well assay. In well assay 10mm in diameter wells were made in marine agar plates and the plates were swabbed with 16 hours old inducer strain. To these wells 200ul of cell free supernatant were added to each well. In paper disc assay the Watmann no.1 filter paper discs (6mm in diameter) were saturated with 200ul of cell free supernatant. The impregnant discs were Dlaced in the centre of the plates swabbed with test organisms. The plates were Incubated at 37??C overnight and observed for inhibition zone. The zone of inhibition was measured as the distance from the border of paper disc to the edge of the clear zone and expressed in mm.

An important factor which needs to be realized in order to learn the art of seduction is that people are driven by emotions and the "emotions" triggered when someone is attracted or aroused by another person are extremely strong; they can make us spend 80K on a car or simply say "Yes!" to important business decisions.

We had never thought that we could write so much about npap heromones. We just got to writing, and voila, this article.
Author Dave Thomson

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According to some surveys, about 50% of adult humans can t detect androstenone, unless the concentration is extremely high. Those who can detect androstenone say that its smell is not very pleasant. Androstenone is the main pheromone that men unknowingly secrete that attract women. Both men and women secrete pheromones when they sweat. However, since our body naturally only secretes small amounts...

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