The fishing industry is dominated by the small-scale sector, whic

The fishing industry is dominated by the small-scale sector, which currently supports the livelihoods

of an estimated 83,157 small-scale fishermen and 583,625 of their dependants, for a total of about 667,000 people [27] and [28]. In addition, an unknown but relatively a large number of people are also engaged in post-harvest processing, marketing, and value addition [4]. The fisheries sector contributed 1.9% of Yemen׳s $26.24 billion gross domestic product in 2009 [29]. After oil exports, fisheries constitute the second largest export earner and account for 1.5% of the national labor force, supporting the livelihoods of 3.2% of the national population [30]. The fisheries industry, with its largely rural BMS-734016 location, remains the largest if not the sole source of income for coastal communities [29]. The major challenges hindering economic development in Yemen include political instability, a lack of security, and widening areas of conflicts [31]. Within the fisheries sector, poor governance, the absence Etoposide clinical trial of appropriate legislation, and inadequate infrastructure have been major problems [32] that undermine the social and economic contributions of the fisheries sector. Recently, frequent fuel and electricity

shortages, paired with subsequent price increases, have increased hardship among fishermen [33]. Widespread piracy in the Gulf of Aden and the Arabian Sea has been a major concern and has restricted productivity of fishermen from these areas [27] and [30]. According to the Yemeni government figures released in July 2009, piracy in the Gulf of Aden has cost the country an estimated $200 million in lost fishing revenue and associated revenue [34]. Moreover, Yemen has the world׳s fourth fastest growing population (3.0% in 2013) [35] and the corresponding increase in unemployment rates (17.8% in 2010; 29% in 2012) [36] will pose more threats to the already overexploited fishery resources Carbohydrate and will cause further damage to

the important coastal habitats. A national assessment carried out by the United Nations Development Program in 2010 to assess progress in Yemen toward achieving Millennium Development Goals found that Yemen is unlikely to achieve most of the Goals by 2015 due to chronic underdevelopment, security problems, and a lack of financial resources [33]. Recently, a new national fisheries strategy (2012–2025) has been formulated and has identified fisheries as a potential sector to food security and to create more employment opportunities [30]. The strategy has identified short-term, mid-term, and long-term objectives and a timeframe to achieve these objectives. This strategy and its announced objectives acknowledge the major uncertainty of the sector, in which production estimates are highly uncertain and the stock status of most species is unknown.

Moreover, as one participant said referring to conversations that

Moreover, as one participant said referring to conversations that he had had with people from communities

near several different NMPs: “Everywhere it is the same. The feeling is not good. Management shortcomings were largely seen to extend from these issues with governance. There had never been programs of education or outreach in any of the communities that we visited. Despite this, there was a slightly positive perception (+0.1) that the NMP would increase knowledge of nature and support for conservation (Fig. 3). Yet communities lacked knowledge of rules and regulations, the locations of boundaries, or even the existence of a park because there was little communication emerging from management offices. Access to park management plans was denied to our research team in all but one of four park offices that we visited Romidepsin price without a letter from the DNP head office. If it occurred,

enforcement of rules and regulations was seen to be inconsistent – due to minimal and seasonal monitoring this website – and inequitable – favoring outside business and landowners and commercial fishers over local people. Participants often discussed how there were no mechanisms for participation in creation or management, for consideration of local values and development considerations, for transparency and accountability, for resolving conflicts, or for integrating local and traditional knowledge into management. The one exception was on Koh Chang, where locals had been consulted extensively during the creation of Mu Koh Ranong. Still it was felt by many participants that park managers did not understand local communities in large part because the “superintendent and assistant superintendent never come out into the park”. This paper makes a contribution to the

literature on the impacts of conservation and MPAs in a particular context. This study suggests that local perceptions of NMPs, under the jurisdiction of the DNP, are fairly negative in coastal communities in Thailand. Perceived impacts of NMPs on livelihood strategies and outcomes are mixed. SDHB Fishing and harvesting livelihoods are generally seen to be negatively impacted by NMPs except in cases where rules were misunderstood or not applied. Participants felt there were no impacts or negative impacts for plantation owners or laborers. NMPs were seen to lead to marginal employment or monetary benefits from tourism for most except for a select elite who would gain significantly. There was perceived to be little potential for benefit from employment in NMP management. Negative impacts were seen to stem from reduced access to or lack of development of social, cultural, human, political, natural, physical, and financial assets. Conservation outcomes were perceived to be mostly positive for terrestrial environments and quite mixed for marine environments. Opinions of DNP governance and management were quite negative.

Rats with regular estrous cycle were submitted to ovariectomy (OV

Rats with regular estrous cycle were submitted to ovariectomy (OVX)9 or sham surgery under xilazine (0.03 ml/100 g bw/ip-Dopaser Laboratories Calier S.A., Barcelona, Spain) and ketamin (0.07 ml/100 g bw/ip-Fort Dodge Saúde Animal Ltd., Brazil). The animals were randomly separated in 4 groups with 40 animals each one: (1) sham, (2) OVX/O, (3) OVX/E2 and (4) OVX/RLX. Every treatment started at the 8th day after ovariectomy

and lasted for 60 days. buy Ku-0059436 The OVX animals received pellets (1.2 cm silastic tubing; Dow Corning, Grand Rapids, MI, USA) with 17β-estradiol (400 μg; Sigma, Saint Louis, MO, USA) – OVX/E2 group or pellets with corn oil – group OVX/O. The pellets were subcutaneously inserted in the back of the rats and changed each 30 days during the experimental selleck chemicals llc period because in this last period there was modification in the vaginal smears with the presence of large amounts of leukocytes, according to previous studies conducted in our

laboratory (date not shown). Raloxifene (1 mg/kg/day; Evista; Lilly, São Paulo, SP, Brazil) was directly liberated in the stomach of the experimental animals, through gavage. The treatments were performed for 60 days. The animals were anesthetized with xylazine (0.03 ml/100 g body weight [bw]/intraperitoneal [ip]; Dopaser® Laboratories Calier SA, Barcelona, Spain) and ketamine (7 μl/kg bw/ip; Fort Dodge Saúde Animal Ltd., Brazil), and after the antisepsis Dynein (polyvinylpyrrolidone iodide; Indústria Química e Farmacêutica Rioquímica Ltd., Brazil), the right upper incisive was extracted with appropriate instrumental.10 The dental sockets were sutured with silk thread (Ethicon 4.0, Johnson and Johnson, São Paulo, SP, Brazil). The extractions were realized in a way that at the end of 60 days,

it was possible to obtain pieces with reference to 7, 14, 21, 28 and 42 days of alveolar wound healing. After 60 days, the animals were sacrificed by intracardic perfusion (Cole Parmer Instrument Company, Vernon Hills, IL, USA) with a 4% paraformaldehyde solution (Acros organics, NJ, USA) then, the right maxilla was removed. The obtained pieces were postfixed in 4% paraformaldehyde solution, demineralized with 1% EDTA (Merck, Darmstadt, Germany) and crioprotected with sucrose (Merck, Darmstadt, Germany). The pieces were longitudinally sectioned through the long axis of the alveolar process with a cryostat (Micron Zeiss, Berlin, Germany) in order to obtain slices with 14 μm thickness, that were mounted in previously gelatinized slides.

Besides other aspects it could help to distinguish compound-speci

Besides other aspects it could help to distinguish compound-specific wash-in effects from barrier-disruption related effects. In contrast to the recommendation of the OECD-Guideline we decided against 3H-sucrose as ISTD because of poor information about applicability and the set limit value of 5% absorption (Walters et al., 1997). Moreover, the very high hydrophilic compound ITF2357 sucrose is not representative for routinely tested lipophilic test compounds. In accordance with the above-mentioned ‘applicability domain’ for integrity tests, the ISTD should be selected on the basis of the physico-chemical properties of the test compound, to indicate representatively the barrier function

in relation to the respective pathway through the skin. Another suggested reference compound for ISTD is phenol red. Yet a 100 times higher concentration of phenol red is needed to achieve the same analytical sensitivity as the 3H-labeled reference compounds and high concentrations increase the risk to influence the test results (Dugard and Scott, 1986). To get a first impression of the performance of different ISTDs, 3H-caffeine and 3H-mannitol were tested in parallel to 3H-testosterone in human skin experiments. The combination CAL 101 3H-testosterone and 14C-MCPA resulted in moderate and weak correlations (R2 0.52 and 0.16 for AD and

maxKp comparison, respectively). This is probably due to the divergent physico-chemical properties (logP 3.32 and −0.71 (at pH 7) and MW 288.4 and 200.6 g mol−1 for testosterone and MCPA, respectively), but also due to the narrow absorption range which was covered. In fact, once the absorption range was expanded, as done in the special investigation with damaged and undamaged rat skin, the correlation was improved (R2 0.859 and 0.911 against AD and maxKp, respectively). Weak correlations were obtained with 3H-mannitol as ISTD with 14C-testosterone (R2 0.34 and 0.14 for

AD and maxKp comparison, respectively) and 14C-caffeine (R2 0.20 and 0.40 for AD and maxKp comparison, respectively). Also in this case, the distance of the logP values for the very polar ISTD 3H-mannitol and the rather lipophilic test compounds was probably too large. For the combination 14C-testosterone and 3H-caffeine, having closer logP values, the best correlations Nintedanib (BIBF 1120) with human skin were obtained (R2 0.62 and 0.81 for AD and maxKp comparison, respectively). However, the reverse case (3H-testosterone and 14C-caffeine) resulted in weaker correlations (0.59 for maxKp comparison) and even no correlation (R2 0.04 for AD comparison) – probably due to a lower number of replicates (n = 5) and one obvious outlier. Summing up, an ISTD with close physico-chemical properties to the test compound is preferable; however, the results imply that also ISTDs with a certain distance to the test compound are applicable. Finally, the suitability of the current ISTD approach was proven by the independence of 14C-analytics by LSC in the presence of 3H (Fig.

Fig  3 depicts this comparison for two healthy donors The simult

Fig. 3 depicts this comparison for two healthy donors. The simultaneous measurements of 4 to 96 RBCs (depending on the model of the automated patch systems) allow for measurement of a population of RBCs with exactly the same experimental procedure, and there is no experimental bias towards choosing a (particular) cell. In contrast, classical patch-clamp allows for more (visual) control over the particular experiment/cell and at least an order of magnitude lower noise level, typically approximately 1 pA. Comparing

data from cell suspension experiments (cp. Section (4.2) “Ion fluxes”) and those issued from patch-clamp studies is a common but difficult task, Ibrutinib clinical trial which can be exemplified by the entry of Ca2 + observed in sickle cells upon deoxygenation. This entry, designated Psickle, is best characterised as a poorly selective permeability pathway for small, inorganic monovalent and divalent cations.77 Experiments in which the fraction of activated cells was studied as a function of the external Ca2 + concentration showed that sickling is a stochastic event

of random intensity among HbSS RBCs, capable learn more of generating maximal Gardos channel activation in a small fraction of cells during each deoxygenation-sickling pulse. Consistent with the stochastic nature of Psickle, repeated pulses led to the progressive accumulation of dense cells, whereas a single long pulse caused only an early production of a single small fraction of dense RBCs.78 Lew et al. eventually depicted this nature clearly by writing: “When electrophysiologists finally approach the study of Psickle under patch-clamp, they ought to bear in mind the probabilistic nature of Psickle in each deoxygenation

pulse before consulting their this website psychiatrist for the lack of reproducibility!”.77 One has to keep in mind that electrophysiology conclusions are drawn from results where the membrane potential is changed at will by the experimenter, meaning that they are rarely obtained at the resting membrane potential, rendering comparison with cell suspensions difficult. This is exemplified in a recent study, where it was shown that increased membrane permeability for sorbitol in malaria-infected RBCs could not easily be reconciled with data from whole-cell experiments.79 Indeed, in isosmotic sorbitol haemolysis, the membrane potential reaches values above + 50 mV due to the absence of charges at the extracellular side of the membrane. Subsequent comparison of these data to that obtained with patch-clamp (at this membrane potential, inwardly rectified currents induced by infection are almost totally abolished[62] and [65]) seems impossible. FCM is a technique that uses optical detection methods for counting and analysing particles in the size range of micrometres.

The CAS (Chemical Abstracts Service) number of the compound shoul

The CAS (Chemical Abstracts Service) number of the compound should allow its identification through the free Common Chemistry utility (http://www.commonchemistry.org). Alternatively several databases

provide alternative names that have been used for individual compounds together with their IUPAC names (http://pubchem.ncbi.nlm.nih.gov/; http://www.chemspider.com/; http://www.ebi.ac.uk/chebi/; http://www.genome.jp/kegg/). A common problem with compounds that exist in more than one isomeric form is the failure to indicate which form was used. The question of whether the enzyme under study has been modified in any way is important since such modifications may affect its behaviour. It is common to find that proteolysed preparations are used, either by design check details or accident, with the assumption that if the enzyme preparation has activity, buy Roxadustat it must be satisfactory. However, there is a considerable amount of evidence that this may not be a valid assumption. Proteolytic cleavage can occur quite easily during extraction and purification of enzymes and this is, for example, known to affect the pH optimum of fructose bisphosphatase (EC 3.1.3.11) as well as the allosteric properties of that enzyme (Nimmo and Tipton, 1982) and of glutamate dehydrogenase [NAD(P)+] (EC 1.4.1.3) (McCarthy and Tipton, 1985). Despite this, an increasing number of studies have been conducted with preparations that are truncated,

fused with another protein, contain tags, such as poly-His, lack native glycosylation or are suspended in some unusual detergent without any investigation as to whether

these have altered the behaviour of the enzyme.. The units in which enzyme activities are given should be specified, but their Leukotriene-A4 hydrolase form has not been standardized. Activities are generally expressed as the amount product formed in unit time per amount enzyme protein present. This is often known as the International unit (IU) when 1 IU is the amount of enzyme that produces 1 µmol of product per min. The SI equivalent of the IU is the katal (mol/s) and this may alternatively be used as a unit of activity (conversion factors 1 IU=16.67 nkat; 1 kat=6×107 IU). This is the recommended unit of the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) and the International Union of Pure and Applied Chemistry (IUPAC) (Dybkaer, 2001). However, many biochemists find this an inconveniently small unit of activity and continue to use the IU (see also Bisswanger, 2014). It is also common to find enzyme activities expressed in non-standard units, such as the amount of enzyme catalysing a specified change in absorbance within a specific time (s, min or h). Since these are often referred to as units, there is scope for confusion with the IU. The stoichiometry of the reaction assayed is also of importance in this context. For example, the enzyme carbamoyl-phosphate synthase (ammonia) (EC 6.3.4.

24% compared to respective control activities (*P≤0 001 in each c

24% compared to respective control activities (*P≤0.001 in each case). Rats were found to be protected against any such decreased activities of enzymes when pre-treated with Cu LE at a dose of 200 mg/kg buy BIBW2992 body weight. Figure 6 indicates tissue disintegration and breakdown of cellular matrix to potentiate sloughing of mucosal cells on piroxicam administration.

Photomicrographs of Sirius red stained sections and confocal microscopy done to determine tissue collagen volume reveal that piroxicam depleted tissue collagen significantly (33.4% decrease Vs control, *P≤ 0.001Vs control). Collagen volume did not decrease significantly in Cu LE pre-treated piroxicam administered group which indicates that tissue collagen depletion and gastric tissue damage can be well prevented if prior administration of Cu LE is done. Selumetinib datasheet Cu LE at a dose of 200 mg/kg body weight dose can effectively decrease pro-MMP 9 activity by 21.1% against activity in control animals. Therefore, when Cu LE was administered before piroxicam feeding, activity of pro-MMP 9 significantly decreased than the

levels determined for only piroxicam administered animals. The activity levels of Pro-MMP 9 in Cu LE + Px treated animal group decreased by 21.3% against only piroxicam administered group. Dry curry leaf powder yielded 14.72% (by weight) water soluble components. Chemical characterization of the extract showed presence of polyphenol, flavonoid, alkaloid and tannin. Table 3 shows the amount of each substance in milligrams per gram extract. The extract contains protein and water soluble polyphenols in appreciable amount. Figure 7Ashows GCMS analysis of the extract and 7B bears the representative images of mass spectrometry of five important compounds present in the extract. Ten of the total fifteen compounds identified to be present in the extract include GC-MS reference compounds and metabolites from pestidicides. Therefore, five of the fifteen compounds determined to be relevant in the present study are pyrrolidine,[2-butyl-1-methyl-], 2,2′-dipiperidine, phenol,[2-methyl-5-(1-methylethyl)], estra-1,3,5(10)-triene-17-one and phytol. Presence of these five

compounds clearly supports the presence of alkaloids, polyphenols, flavonoids and chlorophyll respectively in Cu LE. Alternative medicine in management of different diseases is gaining in importance G protein-coupled receptor kinase and emerging as an extensive field of research for the drug development industry. Different dietary factors and nutritional components are emerging in future therapeutics either as magical healers or as protective shields in ensuing fatal diseased conditions. Recent management of gastric pathology also relies more on the upcoming trend of using alternative medicine for protection and remedy. Considering the changes in disease management we searched for herbal nutritional sources effective in protecting against piroxicam induced gastro-ulcerative side effect.

The most important components of the sprat’s diet are micro- and

The most important components of the sprat’s diet are micro- and mesozooplankton – copepods, cladocerans and rotifers. The diet of the herring is dominated by micro- and mesozooplankton in the first period of life, but older fish consume mainly mysidaceans (macrozooplankton) (Załachowski et al., 1975 and Wiktor, http://www.selleckchem.com/products/AC-220.html 1990). The copepods in the sprat and herring diet are represented mostly by Pseudocalanus minutus elongatus, Acartia spp. and Temora longicornis ( Załachowski et al., 1975 and Wiktor, 1990). Copepods are the most abundant zooplankton species

in the Baltic Sea and adjacent waters. Numerous environmental factors – most importantly, temperature – govern essential physiological and metabolic processes in copepods. Together with food quality and concentration, this affects mortality Panobinostat rates (Hirst & Kiørbe 2002), egg production (Halsband-Lenk et al. 2002) and the growth and development rates of these animals (Twombly and Burns, 1996, Campbell et al., 2001, Peterson, 2001, Hirst and Kiørbe, 2002, Leandro et al., 2006a and Leandro

et al., 2006b). In copepods, stage durations decrease and growth rates increase significantly with temperature, causing the animals to develop faster (Leandro et al., 2006a and Leandro et al., 2006b). Temperature also has a very important influence on moulting rates in juveniles (Hirst & Bunker 2003). Experiments on the growth rate of T. longicornis suggest that this parameter is directly proportional to food concentration ( Harris and Paffenhöfer, 1976a, Harris and Paffenhöfer, 1976b and Klein Breteler et al., 1982) and is strongly influenced

by food quality ( Klein Breteler et al. 1990). The development of T. longicornis has also been found to accelerate with temperature ( McLaren, 1978, Martens, 1980, Klein Breteler and Gonzalez, 1986, Hay et al., 1988 and Fransz et al., 1989). However, the combined effect of food concentration and temperature as a function of these parameters on the growth and development rates of T. longicornis at each of the model stages (naupliar, C1, C2, C3, C4, C5) is Docetaxel order established in this paper. Recently, quantitative expressions describing the effects of temperature and food concentration on the growth and development of P. minutus elongatus and Acartia spp. were presented by Dzierzbicka-Głowacka, 2004, Dzierzbicka-Głowacka, 2005a and Dzierzbicka-Głowacka, 2005b) and Dzierzbicka-Głowacka et al., 2006 and Dzierzbicka-Głowacka et al., 2009a. The experimental data given by Klein Breteler and Gonzalez, 1986, Klein Breteler et al., 1982 and Klein Breteler et al., 1990were sufficient to do likewise for T. longicornis. The present work advances the idea of establishing the combined effect of temperature and food concentration on the development and growth of the naupliar stage and copepodid stages (C1, C2, C3, C4, C5) of T. longicornis.

Ten/fifteen-year survival, leukemic transformation and fibrotic p

Ten/fifteen-year survival, leukemic transformation and fibrotic progression rates were significantly worse in early/prefibrotic PMF vs ET. However thrombosis rates were similar between the two groups. These results validate the clinical relevance of strict adherence to WHO criteria in the diagnosis of ET. In connection to this, useful GSK-3 inhibitor information

is expected from the Anahydret trial.49 Anahydret is a randomized single blind international multicenter phase III study designed to evaluate the non-inferiority of anagrelide vs HU in 258 high risk ET patients diagnosed according to the 2008 WHO diagnostic criteria. This classification, at variance of PVSG criteria required in the PT-1 trial, included a more homogenous category of patients excluding those with early myelofibrosis who, at diagnosis, present different hematological and clinical features in comparison with WHO-ET. Moreover, contrary to PT-1 enrolling

criteria that included all comers with ET, these were de novo diagnosed and cytotoxic therapy naïve patients. During the whole study period, 11 major ET‐related complications occurred in the anagrelide group (5 arterial events, 2 venous thrombotic complications Maraviroc clinical trial and 4 bleedings) and 12 major events were seen in the hydroxyurea arm (5 arterial events, 5 venous thrombotic events and 2 bleedings). Transformations to myelofibrosis were not reported. This study provides preliminary evidence for non-inferiority of anagrelide

compared to HU in the first line treatment of ET diagnosed according to the WHO classification. However, compared to PT-1, the number of patients enrolled was small, duration of follow-up relatively short and considerably fewer end-point events were recorded. It is therefore questionable whether this study has the statistical power to detect the differences observed in the PT-1 study. Therefore, anagrelide does appear to provide partial protection from thrombosis, particularly in JAK2 V617F old negative ET patients, and may be suitable as second line therapy for patients in whom hydroxyurea is inadequate or not tolerated.[17] and [50] In Europe, anagrelide is licensed only for patients with ET who are refractory or intolerant to first-line therapy with hydroxyurea, according to the ELN criteria.44 On the contrary, anagrelide has been approved by the Food and Drug Administration as a first-line agent for the control of thrombocytosis associated with MPN. IFN-alpha was considered for the treatment of patients with MPN since this agent suppresses the proliferation of hematopoietic progenitors, has a direct inhibiting effect on bone marrow fibroblast progenitor cells, and antagonizes the action of platelet-derived growth factor, transforming growth factor-beta and other cytokines, which may be involved in the development of myelofibrosis.

Membranes were then washed 3 × with PBS-T

and incubated f

Membranes were then washed 3 × with PBS-T

and incubated for 1 h at RT with rabbit anti-mouse HRP conjugated Oligomycin A order secondary antibody 1:2000 in PBS-T (Abcam, ab6728), before visualization with enhanced chemiluminescence (ECL,Thermo Scientific, 32209) in a dark room. Comparisons were made between control plates of cells and differences at the 5% level considered significant. Multiple-time accumulation data were analysed by Two Way Repeated Measures ANOVA tests and Holm–Sidak posthoc tests, MTT assay data were compared against controls using a One Way ANOVA using Sigma Plot version 11.0 software (SPSS Science Software UK Ltd., Birmingham UK). All data are expressed as mean ± SEM, except MTT data which are expressed as percentage viability. The authors acknowledge that there are no conflicts of interest. The authors would like to thank CP-868596 purchase Professor Pierre Couraud and Dr Ignacio Romero for the hCMEC/D3 cell line and Mr Enrico Cristante (Imperial College London) for the HepG2 cell line. We would also like to thank Dr Jonathan

Corcoran and Dr Maria de Castro Vasconcelos Goncalves (King’s College London) for their help with the confocal microscopy. This work was supported by the Wellcome Trust [080268] and an EPSRC DT grant (EP503523/1). “
“The blood–brain barrier is formed by brain endothelial cells lining cerebral microvessels, and performs a combination of physical, transport and enzymatic barrier functions (Abbott et al., 2010). The physical barrier is largely the result of extremely tight zonulae occludentes (tight junctions), which seriously restrict the paracellular flux of small hydrophilic molecules ( Tsukita et al., 2001 and Wolburg and Lippoldt, 2002). The transport barrier results from a combination of specific membrane carrier systems for uptake and efflux

CYTH4 that regulate small molecular traffic at apical (luminal) and basal (abluminal) membranes ( Begley, 2004, Hawkins et al., 2002 and Hawkins et al., 2006), together with receptor-mediated and absorptive-mediated transcytosis (RMT, AMT) that mediate the transfer of small amounts of larger molecules such as peptides and proteins ( Hervé et al., 2008 and Wolburg et al., 2009). The enzymatic barrier results from the presence on and within brain endothelial, of ecto- and endo-enzymes capable of metabolising endogenous and exogenous compounds ( Abbott et al., 2006 and Persidsky et al., 2006). The net result of all three barrier functions is protection of the brain from potentially toxic or neuroactive agents capable of disturbing neural function, and a contribution to homoeostatic regulation of the brain microenvironment that is essential for neural activity and integration. Increased understanding of BBB function has come from careful study in vivo, traditionally using animal models, and increasingly involving minimally invasive investigation, where the technologies allow, in human subjects ( Hawkins and Egleton, 2007 and Rebeles et al., 2006).