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Pathogen research abs 1 || Pathogen research abs 2 || Pathogen research abs 3 || Pathogen research abs 4 || Pathogen research abs 5 || Hormone and endocrine research abs 1 || Hormone and endocrine research abs 2 || Hormone and endocrine research abs 3 || Hormone and endocrine research abs 4 || Hormone and endocrine research abs 5

Appetite. 2002 Jun;38(3):189-97.
Public perception of a range of potential food risks in the United Kingdom.

Kirk SF, Greenwood D, Cade JE, Pearman AD.

Nutrition Epidemiology Group, Nuffield Institute for Health, 71-75 Clarendon Road, University of Leeds LS2 9PL, UK. s.f.l.kireeds.ac.uk

This study aimed to use a standard questionnaire to obtain a nationally representative sample of opinions on a range of potential food risks. Participants were a national sample of 1182 subjects selected using three different approaches: random and sentinel postal samples and a telephone survey. A modified psychometric questionnaire (the Perceived Food Risk Index) was administered to subjects on three occasions, spanning five time-points. Baseline data collection was undertaken from October to December 1998 (phase 1). The second wave of data collection was undertaken over three time-points in February, April and July 1999 (one-third of respondents to phase 1 at each time-point - data combined as phase 2), and the final phase of data collection was between October and December 1999 (phase 3). Principal components analysis was used to assess the intercorrelations between the items on the questionnaire. Two main components were identified as 'dread' and 'knowledge'. Saturated fats were perceived as the least dreaded and the most known of the potential risks considered, while bovine spongiform encephalopathy and Salmonella were the risks dreaded the most. There was a slight perception that the potential risks had become more known over the year, especially for growth hormones. This study has raised a number of important issues for risk communicators. Despite current policy aimed at reducing fat intake, this will be difficult to achieve at a population level since people are not worried about its impact, yet food safety continues to be a significant concern to the public. 2002 Elsevier Science Ltd. All rights reserved.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12071684&dopt=Abstract

Protein Expr Purif. 2002 Jun;25(1):114-23.
Rescue of intracellularly trapped lutropin receptor exodomain by endodomain and reconstitution of a functional membrane receptor: interaction between exo- and endodomains.

Bozon V, Couture L, Pajot-Augy E, Richard F, Remy JJ, Salesse R.

Laboratoire de Physiologie des Cellules Cardiaques et Vasculaires, CNRS-UMR 6542, Tours, France.

The lutropin receptor consists of an extracellular N-terminal half and a membrane-associated C-terminal half. hCG initially binds the exodomain with a high affinity and the resulting complex is thought to interact with the endodomain through a secondary contact generating a hormonal signal. Therefore, the exodomain and endodomain are likely to associate directly or indirectly with each other, but lack of fruitful materials and technology has hampered knowledge about their physical relationship and contact sites. In this work, we engineered a double-recombinant (separate exodomain and endodomain) baculovirus system successfully expressing on the surface of insect cells high levels of split LH receptor, binding the hormone with high affinity and inducing cAMP synthesis. In contrast, the exodomain and endodomain expressed separately were mostly trapped in cells. Our data indicate that the exodomain and endodomain are disulfide linked in the split receptor. When the disulfide links were reduced, the split receptor still induced cAMP up to 60%, which raises the intriguing possibility of a residual induction activity of the endodomain in the absence of high-affinity ligand binding. Our results also underscore that the targeting and transport of the LH receptor to plasma membrane require both domains, whereas each domain is independently sufficient for folding. The expression level of functional lutropin receptors is the highest ever reported. Our system may also be useful for future studies requiring a high amount of soluble secreted exodomain. 2002 Elsevier Science (USA).

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12071706&dopt=Abstract

Protein Expr Purif. 2002 Jun;25(1):124-33.
Bacterial expression of a natively folded extracellular domain fusion protein of the hFSH receptor in the cytoplasm of Escherichia coli.

Lobel L, Pollak S, Lustbader B, Klein J, Lustbader JW.

Center for Reproductive Science and Department of Obstetrics and Gynecology, Columbia University, 630 West 168th Street, New York, New York 10032, USA.

We have expressed the extracellular domain of the hFSH receptor as a fusion protein with thioredoxin in the cytoplasm of an Escherichia coli strain that contains mutations in both the thioredoxin reductase and the glutathione reductase genes. The chimeric protein isolated following induction of expression was purified in a soluble form and binds hFSH with an affinity approximating that of native receptor. This truncated form of the receptor displays the same specificity as intact receptor and does not bind hCG. The protein is expressed at levels that exceed 5 mg/L in the bacterial cytoplasm. Expression of the properly folded extracellular domain of the hFSH receptor in the cytoplasm of E. coli allows the facile and economical purification of large quantities of material. This will facilitate the determination of the structure of the hormone-binding domain of this glycoprotein receptor as well as the production of epitope-specific antibodies. 2002 Elsevier Science (USA).

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12071707&dopt=Abstract

Biochem J. 2002 Jul 1;365(Pt 1):213-22.
Isolation and characterization of the monkey UGT2B30 gene that encodes a uridine diphosphate-glucuronosyltransferase enzyme active on mineralocorticoid, glucocorticoid, androgen and oestrogen hormones.

Girard C, Barbier O, Turgeon D, Belanger A.

Oncology and Molecular Endocrinology Research Center, Laval University Medical Center (CHUL) and Laval University, 2705, Laurier Boulevard, Quebec, Canada G1V 4G2.

The present study reports the genomic organization and the characterization of a novel cynomolgus monkey UDP-glucuronosyltransferase (UGT) enzyme, UGT2B30. UGT enzymes are microsomal proteins that catalyse the transfer of the glucuronosyl group from UDP-glucuronic acid (UDPGA) to a wide variety of lipophilic compounds, namely hormonal steroids. The 15 kb UGT2B30 gene amplified by PCR showed a genomic organization similar to those encoding UGT2B human enzymes. The cDNA encoding UGT2B30 was isolated from a cynomolgus monkey prostate cDNA library, and the deduced amino acid sequence showed an identity of 94% with UGT2B19, a monkey isoform previously characterized. Stable expression of UGT2B30 protein in human kidney 293 (HK293) cells was assessed by Western-blot analysis and its conjugating activity was screened using 39 potential substrates. The UGT2B30 enzyme is active on many compounds of different classes, including testosterone, dihydrotestosterone, 5alpha-androstane-3alpha,17beta-diol, androsterone, oestradiol, tetrahydroaldosterone and tetrahydrocortisone, with glucuronidation efficiencies (V(max)/K(m) ratios) ranging from 0.6 to 8.8 microl x min(-1) x mg of protein(-1). Reverse-transcriptase-PCR analysis revealed that the UGT2B30 transcript is expressed in several tissues, including prostate, testis, mammary gland, kidney, adrenals and intestine. The relative activity of UGT2B30 in comparison with other simian UGT2B isoforms, as well as its large variety of substrates, strongly suggest that this enzyme is essential to inactivation of several steroids.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12071853&dopt=Abstract

Biochem J. 2002 Sep 15;366(Pt 3):863-72.
Effects of L- and D-REKR amino acid-containing peptides on HIV and SIV envelope glycoprotein precursor maturation and HIV and SIV replication.

Bahbouhi B, Chazal N, Seidah NG, Chiva C, Kogan M, Albericio F, Giralt E, Bahraoui E.

Laboratoire d'Immuno-Virologie, EA 30-38 Universite Paul Sabatier, UFR/SVT, 118 route de Narbonne 31062 Toulouse, France. bahraouict.fr

The aim of the present study was to evaluate the capacity of synthetic l- and d-peptides encompassing the HIV-1(BRU) gp160 REKR cleavage site to interfere with HIV and simian immuno-deficiency virus (SIV) replication and maturation of the envelope glycoprotein (Env) precursors. To facilitate their penetration into cells, a decanoyl (dec) group was added at the N-terminus. The sequences synthesized included dec5d or dec5l (decREKRV), dec9d or dec9l (decRVVQREKRV) and dec14d or dec14l (TKAKRRVVQREKRV). The peptide dec14d was also prepared with a chloromethane (cmk) group as C-terminus. Because l-peptides exhibit significant cytotoxicity starting at 35 microM, further characterization was conducted mostly with d-peptides, which exhibited no cytotoxicity at concentrations higher than 70 microM. The data show that only dec14d and dec14dcmk could inhibit HIV-1(BRU), HIV-2(ROD) and SIV(mac251) replication and their syncytium-inducing capacities. Whereas peptides dec5d and dec9d were inactive, dec14dcmk was at least twice as active as peptide dec14d. At the molecular level, our data show a direct correlation between anti-viral activity and the ability of the peptides to interfere with maturation of the Env precursors. Furthermore, we show that when tested in vitro the dec14d peptide inhibited PC7 with an inhibition constant K(i)=4.6 microM, whereas the peptide dec14l preferentially inhibited furin with a K(i)=28 microM. The fact that PC7 and furin are the major prohormone convertases reported to be expressed in T4 lymphocytes, the principal cell targets of HIV, suggests that they are involved in the maturation of HIV and SIV Env precursors.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12071862&dopt=Abstract

The most ostensive feature that distinguishes us human from chimps and other primates is the lack of bodily hair. During evolutionary process, we have lost the majority of hair. Hair is no longer an essential part of our body, just like appendix. What little hair we still have on our scalp and a few other bodily parts is still regarded as significant for reasons other than biological necessity. Hair loss is naturally accompanied by aging process, although the extent of hair loss and the timing of onset vary widely among individuals. Thus, loss of hair and baldness is considered as a symbol of maturity or old age. Like winkles and other signs of aging, hair loss is not welcome by most people, because we don't welcome aging, and being perceived as an aging person. However, it is alopecia, or premature hair loss that especially concerns certain people.

Hair Million is a blend of Asian herbs that wards off hair loss and promotes hair growth. Of various approaches to hair restoration, Hair Million offers advantages including low cost compared with other methods or drugs, and safety, because it is made of safe and healthy herbs.

DHEA is a natural hormone, and it is produced in our body by the adrenal glands. DHEA has been suggested to provide numerous potential benefits. DHEA (or dehydroepiandrosterone) is converted into androgens (male hormones) or estrogens (female hormones) in the cells. Our bodies produce decreasing amount of DHEA as we get older. various health benefits: To deter aging, improve sexual function/erectile dysfunction, treat cognitive decline, enhance athletic performance, facilitate weight loss, improve strength, prevent osteoporosis, enhance immunomodulation for rheumatic conditions, and treat depression.

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