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.

Patchouli has a sugary, very resilient, musky trail that is confeaturered very sexy. On its own, it is the kind of trail you moreover adoration or abhor, as it can be overpowering, but when blended into a imbue with other comments, it gives the imbue a sexier feel.

The completion of this article on hunting pheromones was our prerogative since the past one month. However, we completed it within a matter of fifteen days!

The complexities of the subject matter within this article strive to give you a better look at what this subject is all about.

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.

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.

c) The normal 20 bacterial strains isolated from 20 algal species were crossed with terrestrial bacteria such as E-coli, Staphylococcus aureus separately

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

That's a simple shortlist of checkpoints you can perform before considering a pheromone oil product. The second point is extremely important. A company which produces it's own product in-house is usually a good sign that they aim to be in business a long time. Even more importantly, you can bet they have conducted plenty of research on the product and will continue to do so in future.

Ever heard about pheromones? That is the stealthy of sexual drawion. In the animal world, pheromones draw affiliate the contrary sex irresistably when the animal is in reheat. Think about the fechap cat who draws chap cats in droves, who attack over her when she is in reheat.

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.

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

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.

property they have in everyday? A unique connection? Or is it the way they smell to each other? Actually, the way you smell acting an important part in the mating contest. It is proper in the animal world. Like it or not, it is also proper among people.

Hypnea valentiae Rhodophyceae Hypnea pannose Rhodophyceae Hypnea esperi Rhodophyceae Acanthophora spicifera Rhodophyceae ISOLATION OF EPIPHYTIC BACTERIA

Seaweeds itself secretes secondary metabolites to prevent fouling and grazing. In addition to that epibiotic bacteria on macro algae can also produce antifouling compounds that work in concert with the seaweed derived compounds to protect the seaweed surface. Recent studies have highlighted important roles of epibiotic bacteria colonizing the surface of seaweeds and releasing antifouling compounds. For the past 50 years antibiotics have revolutionized medicine by providing cures for formerly life threatening diseases. However, strains of bacteria have recently emerged that are virtually unresponsive to antibiotics such multidrug resistance, arising mainly through antibiotic misuse, is now recognized as a global health problem. In this situation, it is clear that new classes of antibiotics are urgently needed. Many marine bacteria have been shown to produce secondary metabolites that display antibacterial properties. The first antibiotic from a marine bacterium was identified and characterized in 1966. In addition, bacteria in biofilm on the surface of marine organisms have been documented to contain a higher proportion of antibiotic producing bacteria than some other marine environments (Burgess, et al., 1999). Marine epibiotic bacteria, associated with nutrient-rich algal surfaces have also been shown to produce antibacterial secondary metabolites which inhibit the settlement of potential competitors. Recently a lot new novel antibiotics such as Phenazine, thiomarinol, phenazine-1-carboxylic acid, 1-hydroxyphenazine 2-n-heptylquinol-4-one, 2-n-nonylquinol-4-one pyolipic, loloatins, agrochelin, sesbanimides, pelagiomicins, indomycione and indomycione have been identified from various marine epibiotic bacterial organisms. In particular, some species of the genus Pseudomonas produce both antibiotics and several other bioactive substances. For example, Pseudoalteromonas rubra and Pseudoalteromonas aurantia have been reported to be antibiotic producing bacteria. The phenomenon of higher organisms utilizing their associated microflora for the production of beneficial secondary metabolites is common in the marine environment (Yotsu, et al., 1987). A study of bacteria isolated from marine algae surfaces indicated that the incidence of antibiotic producing strains from this habitat was 20% whereas that from sea water was only a few percent. In addition, some bacteria that previously did not produce any active compounds have been found to be producing such metabolites when they are exposed to other bacterial species or extra cellular chemical from other bacteria. Bacteria may also produce antimicrobial compounds when they sense the presence of competing organisms. However, few attempts have been made to study such chemical communication between different bacterial species or how this might affect. The secretion of antimicrobial compounds (Mearns-Spragg, et al., 1998). Bacterial communication by the chemical signals for specific function is simply known as Quorum sensing. In which a bacterial population receives input from the environment and elicits an appropriate response (Hiroaki and Kristina. 2003). The term "quorum sensing" describes the ability of a microorganism to perceive and response to diffusible signal molecules. Bacterial cells sense their population density through a sophisticated cell to cell communication system and trigger expression of particular genes. Tne first system of density-dependent regulation was studied in detail with the luminescence of Photobacterium fischeri (formerly known as Vibrio fischeri) by Bassler et al., 1997. Eventually, they discovered that 3-oxo-N-(tetrahydro-2-oxo-3-furanyl) hexanamid or N-3-(oxohexanoyl) homoserine lactone (OHHL) was responsible the agent in the broth that induced luminescence. Followed by this many researchers have confirmed that in Gram negative bacteria acyl-homoserine lactone is responsible for the cell to cell communication system.

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

Human pheromone oils are fast becoming the "secret weapon" of singles looking for an edge in the game of sex. Let's face it, for most of us, any kind of advantage is welcome!

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.

In culture system B 200ul of 16 hours old producer strain alone was inoculated. In culture system C 200ul of 16 hours old inducer strain alone was inoculated.

Ylang ylang has a resilient, femalely trail. Ylang ylang can be overpowering but when worn lightly or in blends, it is said to put one in a romantic mood. Ylang ylang imbues are epitome for that romantic night out.

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.

Understanding the various varieties of perfume can help to cut through the difficulty in selecting a fragrance. With so many variances within each category, choosing exactly the right aroma for your body or anyone else's for that matter, is no easy task.

Jasmine, patchouli, sandalwood, rose, ylang ylang and a number of other aromatherapy oils worn in imbuery are known for their aphrodisiac properties.

Wagner, V. E., D. Bushneil, and L. Passador. 2003. Micro array analysis of Pseudomonas aeruginosa quorum sensing regulons. J. Bacteriol, 185: 2080 - 2095.

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

Then there is musk which on its own, is a heady manly trail. With other trails, it might be barely detectable yet it gives the imbue spray an air of mystery. Even the lightest, most fancy imbues inhibit a follow of musk.

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.

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.

Choosing A Product Okay, let's purchase a pheromone oil product. Searching online we come across some likely candidates. Some are cheaper than others while some are offering some pretty sweet deals such as a two-for-one offer. Let's narrow it down:

The completion of this article on hunting pheromones was our prerogative since the past one month. However, we completed it within a matter of fifteen days!

Icebreaker Pheromone Cologne

One of the more musky yet strong aromas falls in the leather category. Leather fragrances have almost an animal like smokiness to them that is suitable for men and some women, although it is not recommended to purchase leather fragrances as a gift for women since it matches very few female pheromones. The leather scents are reminiscent of the aroma that tanning animal hides gives off. While it is not a fragrance for everyone, those for whom it works for creates a very original scent that can be very attractive.

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.

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-)

The truth... pheromone oils probably instill an air of confidence in the "wearer." While you may get noticed, the hard work is still up to you. Alone, pheromone oils won't get you mobbed; you'll still need to use some form of persuasive conversation.

Hiroaki, S., and K. M. Smith. 2003. Molecular mechanisms of bacterial quorum sensing as a new drug target. Curr. Opin. Chem. Biol. 7: 586-591. Hoang, T., Y. Ma, R. J. Stern, M. R. Meneil, and H. P. Schwezer. 1999. Construction and use of low-copy number T7 expression vectors for purification of problem proteins: purification of Mycobacterium tuberculosis RmID and Pseudomonas aeruginosa Lasl and Rhll proteins, and functional analysis of purified Rhll. Gene. 237: 361 - 371.

Did you know that in certain parts of the world, during village dances, daughters would control slices of apple in their armpits while they dance. Then, they would proffer the sweat sopping apples to the guys they confeaturer.

Kell, D. B., A. S. Kaprelyants, and A. Grafen. 1995. Pheromones, Social behaviour and the functions of secondary metabolism in bacteria. Trends in Ecol. and Evol. 10: 126-129.

Burgess, J. G., E. M. Jordan, M. Bregu, and A. Mearns-spragg. 1999. Microbial antagonism: a neglected avenue of natural products research. J. Biotechnology. 70: 27-32.

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

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)

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

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.

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

illaud, A. C, and B. Austin. 1990. Inhibition of the fish pathogen, Serratia liquefaciens by an antibiotic producing isolates of planococcus recovered from sea water. Journal of

Perfumes as we know them were first worn by Egyptians to protect the deadly bodies of mummies. Later, imbues were worn before sex. To get both parties in a more romantic mood.

Holmstrom, C, and S. Kjelleberg. 1994. The effect of external biological factors on, settlement of marine invertebrates and new antifouling technologies. Biofouling. 8: 147-160.

each has a million apocrine glands whose sole event is to products a smell. These only become active winning teens. leading sexual wisdom. A sex trail, if you will.

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).

Vandevivere, P., and D. L. Kirchman.1993. Attachment stimulates exopolysaccharide synthesis by a bacterium. Appl. Environ. Microbiol. 59: 3280-3286.

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].

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.

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.

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

1. Do a check on the company and see how long they have been in business. 2. This is the most important aspect. Check to see if the company produces it's own product in-house. If it does, this is a big plus!

Jasmine imbue has a very bodily perfume. Jasmine necessary oil itself exerts an produce on a fechap hormones. It is worn in aromatherapy to consider hormones and to boost confidence. Jasmine is admired in imbues as it has a resilient erogenous produce on people.

*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).

I reaffiliate appraisal an witty thing about a guy who worn sandalwood as a sore throat remedy. It has an interesting feature produce. It amplified his libido significantly. That means sandalwood imbues do make you sexier.

Fougere is a French fragrance that has gained huge popularity in the United States. Literally translated it means "fern," and has an interested fragrance blend of musty moss-like aroma with herbs such as lavender. Men have a particular fondness for this perfume for its subtle blended scent.

The Oriental aromas are more balsamic with a hint of oak moss, animal scents, or vanilla which creates a noticeable lingering in the air. Obsession is a very popular brand of an Oriental based perfume. Oriental perfumes are considered quite full if not even "heavy."

Now that we have come to the end of this composition on hunting pheromones, we do hope that you enjoyed reading it as much as we enjoyed writing it.
Author Dave Thomson

hunting hperomones | human sex pheromones | humanp heromones products | humans affected by pheromones | humans produce pheromones | hunting pheromones | human pheromones work with alcohol |

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