falciparum P-loop NTPases is carried out Results: Based upon

falciparum P-loop NTPases is carried out.\n\nResults: Based upon distinct sequence features and secondary structure profile of the P-loop domain of obtained sequences, a cladistic classification is also conceded: nucleotide kinases and GTPases, ABC and SMC family, SF1/2 Selleckchem Liproxstatin 1 helicases, AAA+ and AAA protein families. Attempts are made to identify any ortholog(s) for each of these proteins in other Plasmodium sp. as well as its vertebrate host, Homo sapiens. A number of P. falciparum P-loop NTPases that have no homologue in the host, as well as those annotated as hypothetical proteins and

lack any characteristic functional domain are identified.\n\nConclusion: The study suggests a strong correlation between sequence and secondary structure

profile of P-loop domains and functional roles of these proteins and thus provides an opportunity to speculate the role of many hypothetical proteins. The study provides a methodical framework for the characterization of biologically diverse NTPases in the P. Elafibranor molecular weight falciparum genome. The efforts made in the analysis are first of its kind; and the results augment to explore the functional role of many of these proteins from the parasite that could provide leads to identify novel drug targets against malaria.”
“OVAT (one variable at a time) approach was applied in this study to screen the most important physicochemical key determinants involved in the process of sheep wool biodegradation. The process was directed by a keratinase-producing Bacillus subtilis DB 100 (p5.2) recombinant strain. Data indicate that, sheep wool could be degraded efficiently in cultures incubated at 30 degrees C, with initial pH of 7 with agitation at 150 rpm. Two times autoclaved alkali treated and undefatted chopped sheep wool is more

accessible to biodegradation. B. subtilis recombinant cells could utilize sheep wool as a sole source of carbon and nitrogen. Sheep wool-based modified basal medium II, lacking NH4Cl and yeast extract, could greatly support the growth of these bacterial cells. Sheep wool biodegradation was conducted efficiently in the find more absence of kanamycin consequently; high stability of the recombinant plasmid (p5.2) represents a great challenge upon scaling up this process. Three key determinants (sheep wool concentration, incubation time and inoculum size) imposing considerable constraints on the process are highlighted. Sheep wool-based tap water medium and sheep wool-based distilled water medium were formulated in this study. High levels of released end products, produced from sheep wool biodegradation are achieved upon using these two sheep wool-based water media. Data indicate that, sheep wool hydrolysate is rich in some amino acids, such as tyrosine, phenylalanine, lysine, proline, isoleucine, leucine, valine, aspartic acid and glutamic acid. Moreover, the resulting sheep wool hydrolysate contains soluble proteins of high and intermediate molecular weights.

htt(-) cells also failed to maintain myosin II in the cortex of t

htt(-) cells also failed to maintain myosin II in the cortex of the cleavage furrow, generating unseparated daughter cells connected through a thin cytoplasmic bridge. Furthermore, similar to Dictyostelium htt(-) cells, siRNA-mediated knockdown of human HTT also decreased the PP2A activity in HeLa cells. Our data indicate that Htt regulates the phosphorylation status of myosin II during chemotaxis and cytokinesis through PP2A.”
“D-(+)-Galactose-conjugated single-walled carbon nanotubes (SWCNTs)

were synthesized for use as biosensors to detect SHP099 supplier the cancer marker galectin-3. To investigate the binding of galectin-3 to the D-(+)-galactose-conjugated SWCNTs, an electrochemical biosensor

was fabricated by using molybdenum electrodes. The binding affinities of the conjugated SWCNTs to galectin-3 learn more were quantified using electrochemical sensitivity measurements based on the differences in resistance together with typical I-V characterization. The electrochemical sensitivity measurements of the D-(+)-galactose-conjugated SWCNTs differed significantly between the samples with and without galectin-3. This indicates that D-(+)-galactose-conjugated SWCNTs are potentially useful electrochemical biosensors for the detection of cancer marker galectin-3.”
“Background: Paphiopedilum is a horticulturally and ecologically important genus of ca. 80 species of lady’s slipper orchids native to Southeast Asia. These plants have long been of GSK1838705A interest regarding their chromosomal evolution, which involves a progressive aneuploid series based

on either fission or fusion of centromeres. Chromosome number is positively correlated with genome size, so rearrangement processes must include either insertion or deletion of DNA segments. We have conducted Fluorescence In Situ Hybridization (FISH) studies using 5S and 25S ribosomal DNA (rDNA) probes to survey for rearrangements, duplications, and phylogenetically-correlated variation within Paphiopedilum. We further studied sequence variation of the non-transcribed spacers of 5S rDNA (5S-NTS) to examine their complex duplication history, including the possibility that concerted evolutionary forces may homogenize diversity.\n\nResults: 5S and 25S rDNA loci among Paphiopedilum species, representing all key phylogenetic lineages, exhibit a considerable diversity that correlates well with recognized evolutionary groups. 25S rDNA signals range from 2 (representing 1 locus) to 9, the latter representing hemizygosity. 5S loci display extensive structural variation, and show from 2 specific signals to many, both major and minor and highly dispersed. The dispersed signals mainly occur at centromeric and subtelomeric positions, which are hotspots for chromosomal breakpoints.

However, several adult worms of the dose-limiting species C onco

However, several adult worms of the dose-limiting species C. oncophora demonstrably survived the IVM treatment.”
“Acquired long QT syndrome (LQTS) is a disorder of cardiac repolarization most often due to specific drugs, hypokalemia, or hypomagnesemia that may precipitate torsade de pointes and cause sudden cardiac death. Common presentations of the LQTS are palpitations, presyncope, syncope, cardiac arrest, and seizures. An abnormal 12-lead electrocardiogram Semaxanib chemical structure obtained while the patient

is at rest is the key to diagnosis. The occurrence of drug-induced LQTS is unpredictable in any given individual, but a common observation is that most patients have at least 1 identifiable risk factor in addition to drug exposure. The cornerstone of the management of acquired LQTS includes the identification and discontinuation of any precipitating drug and the correction of metabolic abnormalities, such www.selleckchem.com/products/ag-881.html as hypokalemia or hypomagnesemia. Most of the episodes of torsade de pointes are short-lived and terminate spontaneously. We propose a management protocol that could be useful for the daily practice in the emergency pediatric department to reduce the risk of acquired QT prolongation.”
“We are currently

in the midst of a revolution in ageing research, with several dietary, genetic and pharmacological interventions now known to modulate ageing in model organisms. Excitingly, these interventions also appear to have beneficial effects on late-life health. For example, dietary restriction (DR) has been shown to slow the incidence of age-associated cardiovascular disease, metabolic disease, cancer and brain ageing in non-human primates and has been shown to improve a range of health indices in humans. While the idea that DR’s ability to extend lifespan is often thought of as being universal, studies in a range of organisms, including yeast, mice and monkeys, suggest that

this may not actually be the case. The precise reasons BMS-777607 underlying these differential effects of DR on lifespan are currently unclear, but genetic background may be an important factor in how an individual responds to DR. Similarly, recent findings also suggest that the responsiveness of mice to specific genetic or pharmacological interventions that modulate ageing may again be influenced by genetic background. Consequently, while there is a clear driver to develop interventions to improve late-life health and vitality, understanding precisely how these act in response to particular genotypes is critical if we are to translate these findings to humans. We will consider of the role of genetic background in the efficacy of various lifespan interventions and discuss potential routes of utilising genetic heterogeneity to further understand how particular interventions modulate lifespan and healthspan.”

Stochastic resonance using imperceptible stochastic vestibular el

Stochastic resonance using imperceptible stochastic vestibular electrical stimulation, when applied to normal young and elderly subjects, has been shown to significantly improve ocular stabilization

reflexes in response to whole-body tilt; improved balance performance during postural disturbances and optimize covariance between the weak input periodic signals introduced via venous blood pressure receptors and the S63845 in vitro heart rate responses. In our study, 15 subjects stood on a compliant surface with their eyes closed. They were given low-amplitude binaural bipolar stochastic electrical stimulation of the vestibular organs in two frequency ranges of 1-2 and 0-30 Hz over the amplitude range of 0 to +/- 700 mu A. Subjects were instructed to maintain an upright stance during 43-s trials, which consisted of baseline (zero amplitude) and stimulation (non-zero

amplitude) periods. Measures of stability of the head and trunk using inertial motion unit sensors attached to these segments and the whole body using a force plate were measured and quantified in the mediolateral plane. Using a multivariate optimization criterion, our results show that the low levels of vestibular stimulation given to the vestibular organs improved balance performance in normal healthy subjects in the range of 5-26% consistent with the stochastic resonance phenomenon. In our study, 8 of 15 and 10 of 15 subjects were responsive for the 1-2- and 0-30-Hz stimulus signals, respectively. The improvement in balance performance did not differ significantly between the

stimulations in the two frequency ranges. CP-456773 manufacturer The amplitude of optimal stimulus for improving balance performance was predominantly in the range of +/- 100 to +/- 400 mu A. A device based on SR stimulation of the vestibular system might be useful as either a training modality to enhance adaptability or skill acquisition, or as a miniature patch-type stimulator that may be worn by people with disabilities due to aging or disease to improve posture and locomotion function.”
“The increasing prevalence of diabetes among elderly patients underscores the importance of matching the most effective therapy for diabetes self-management with patients’ cognitive and motor skills, as these SRT2104 price diminish with advancing age. Although many geriatric patients state interest in insulin pump therapy for tight glycemic control, few studies have examined the effectiveness, safety, and feasibility of insulin pumps compared to traditional injected insulin therapy in older age groups. It is important, therefore, for physicians to recognize the indications and the age-related barriers to insulin pump therapy in geriatric patients. Indications include glucose variability, hypoglycemia, and poor glycemic control with traditional insulin regimens. Common barriers include poor vision, dexterity, and cognitive status.

(C) 2012 Elsevier B V All rights reserved “
“Granitic ambly

(C) 2012 Elsevier B.V. All rights reserved.”
“Granitic amblygonite-subtype and lepidolite-subtype, aplite-pegmatite sills intruded a biotite>muscovite granite (G1). Two other biotite>muscovite granites (G2 and G3) and a muscovite>biotite granite (G4) crop out in the area. Variation diagrams for major and trace elements of the Variscan rocks show fractionation trends for a) G1 and G4; b) G2, G3 and aplite-pegmatite sills.

The two series are confirmed by the two trends defined by major elements of primary muscovite. The sills also contain Li-bearing muscovite, which has higher Mn, Li, F and paragonite contents and lower Al(VI) content than primary CA4P muscovite from G2, G3 and sills. All sills have pure albite and P(2)O(5) content of buy MDV3100 K-feldspar and plagioclase increases in the series G2, G3 and sills. Beryl occurs in all sills, but lepidolite and a nearly pure petalite only occur in lepidolite-subtype sills, which are the most evolved sills. Primary topaz and amblygonite have a similar composition in all sills. Aplite-pegmatite sills contain cassiterite, which shows sequences of alternating darker and lighter zones. The former are richer in (Nb + Ta + Fe + Mn) than the latter. Manganocolumbite is common in all sills, but ferrocolumbite only appears in amblygonite-subtype

sills and manganotantalite in lepidolite-subtype sills. The sills richest in Li contain reversely-zoned crystals with a homogeneous microlite core and a heterogeneous uranmicrolite rim. Least squares analysis of major elements shows that granite G3 and amblygonite-subtype and lepidolite-subtype aplite-pegmatite sills can be derived from granite G2 magma by fractional crystallization of quartz, plagioclase, K-feldspar, biotite and ilmenite.

Modelling of trace elements shows good results for Sr, but magmatic fluids controlled the Rb and Ba contents of the aplite-pegmatite sills and probably also their Li, F, Sn and Ta contents and crystallization of lepidolite, cassiterite and Nb-Ta oxide mineral assemblage. Selleck Smoothened Agonist Schorl from the lepidolite-subtype sills that cut granite G1 has higher Mg/(Mg + Fe) than schorl from metasomatised granite at sill walls and resulted from the mixing of magmatic fluids carrying B and some Fe with a meteoric fluid that has interacted with the host granite G1 and carried Fe and Mg. Schorl and dravite, respectively from metasomatised granite and micaschist at sill walls, were also formed from the mixing processes.”
“The development of larvae and pupae of Idaea inquinata (Scopoli) was studied at two different temperatures, relative humidities and photoperiods. Tests were carried out at 26 +/- 1 degrees C and 29 +/- 1 degrees C, 50 +/- 5% RH and 70 5% RH, photoperiod 16L:8D and 0L:24D. The highest mortality was observed at 29 degrees C, with 50 and 70% RH and 16L:8D.

(C) 2011 Society of Chemical Industry”
“The mechanism of com

(C) 2011 Society of Chemical Industry”
“The mechanism of complexation of poly-L-lysine (PLL) with methyl orange (MO) and the appearance of induced circular dichroism (ICD) were investigated as a function of dye concentration and temperature and compared with that of the PLL-ethyl orange complex. The formation of stoichiometric complexes with uniform size and intensities of ICDs depended on the length of alkyl groups (methyl and ethyl) as determined from quartz crystal microbalance measurement, absorption spectra, and CD spectra data. Furthermore, at constant PLL concentration,

a dependence of the inversion of the ICD on the MO concentration (CMO) was observed in the PLL-MO complexes, which to our knowledge Selleckchem S63845 has not been reported for a constant dye concentration system. The positive ICD in the PLL-MO complexes observed at CMO lower than 2.0 x 10(-5) M showed reversible

changes in response to heating and cooling, whereas the negative ICD in PLL-MO complexes observed at higher CMO inverted to positive ICD values in response to a decrease in temperature. These results demonstrate the alkyl group substituent in the dye, dye concentration, and temperature play important roles in the formation of PLL-azo dye complex and ICD appearance. (C) 2011 Wiley Periodicals, Selleckchem ATR inhibitor Inc. J Polym Sci Part A: Polym Chem 49: 1691-1698, 2011″
“Incompatibilities in interspecific hybrids, such as sterility and lethality, are widely observed causes of reproductive isolation and thus contribute to speciation. Because hybrid incompatibilities are caused by divergence in each of the hybridizing species, they also reveal genomic changes occurring on short evolutionary time scales that have functional consequences. These changes include divergence in protein-coding gene sequence, structure, and location, as well as divergence in noncoding DNAs. The most important unresolved issue is understanding the evolutionary causes of the divergence within species that in turn leads to

incompatibility between species. Surprisingly, much of this divergence does not appear to be driven by ecological adaptation but may instead result from responses to purely mutational SRT2104 research buy mechanisms or to internal genetic conflicts.”
“Purpose: To examine correlates of human papillomavirus (HPV) vaccine awareness and information sources in a state requiring schools to inform parents about HPV vaccine.\n\nMethods: Telephone survey of a North Carolina population-based sample of 696 parents of females aged 10-17 years about HPV vaccine awareness and information sources (daughters’ schools, healthcare provider, drug company advertisements, news stories) was conducted.\n\nResults: Overall, 91% of parents had heard of HPV vaccine.

Self-incompatibility in Prunus (Rosaceae) is considered to repres

Self-incompatibility in Prunus (Rosaceae) is considered to represent a self recognition by a single factor system, because loss-of-function of SFB is associated with self-compatibility, and allelic divergence of SFB is high and comparable to that of S-RNase. In contrast, Petunia (Solanaceae) exhibits non-self recognition by multiple factors. However, the distribution of self recognition MI-503 in vitro and non-self recognition SI systems in different taxa

is not clear. In addition, in non-self recognition systems, a loss-of-function phenotype of pollen S is unknown. Here we analyze the divergence of SFBB genes, the multiple pollen S candidates, of a rosaceous plant Japanese pear (Pyrus pyrifolia) and show that intrahaplotypic divergence is high and comparable to the allelic diversity of S-RNase while interhaplotypic divergence is very low. Next, we analyzed loss-of-function

of the SFBB1 type gene. Genetic analysis showed that pollen with the mutant haplotype S4sm lacking SFBB1-S4 is rejected by pistils with an otherwise compatible S1 while it is accepted by other non-self pistils. We found that the S5 haplotype encodes a truncated selleck chemicals llc SFBB1 protein, even though S5 pollen is accepted normally by pistils with S1 and other non-self haplotypes. These findings suggest that Japanese pear has a non-self recognition by multiple factors SI system, although it is a species of Rosaceae to which Prunus also belongs.”
“The neurovascular coupling describes a vasoregulative principle of the brain that adapts local cerebral

blood flow in accordance with the underlying neuronal activity. It is the basis of modern indirect brain imaging techniques. Because Vorinostat manufacturer of its wide availability and high tolerability the functional transcranial Doppler has been often used to assess brain function in clinical conditions. In the present paper we will give an overview of the current understanding of the coupling, explain basic principles of the Doppler technique and summarize relevant findings of functional Doppler tests in the different vascular territories of the brain. Finally, the concept of a combined functional electroencephalogram and transcranial Doppler technique will be outlined, which allows simultaneous investigation of the neuronal and vascular responses of neurovascular coupling. (E-mail: bernhard. [email protected]) (C) 2012 World Federation for Ultrasound in Medicine & Biology.”
“In China, wheat stripe rust, caused by Puccinia striiformis f. sp. tritici, is one of the most destructive diseases of wheat. The Longnan and Linxia regions in Gansu Province and Qinghai Province are the major over-summering regions for the pathogen and key epidemiological zones in Northwest China. Population genetic diversity and interregional long-distance spread of the wheat stripe rust pathogen in Northwest China were studied using SSR markers.

Thus, Salmonella enters nonphagocytic cells by manipulating the t

Thus, Salmonella enters nonphagocytic cells by manipulating the two core machineries of actin-based motility in the host: Arp2/3 complex-driven actin polymerization and actomyosin-mediated contractility.”
“We previously demonstrated that Ginkgo biloba extract (GBE) produces an anti-hypertensive effect via enhanced vasodilation responses in young spontaneously hypertensive rats (SHR) and hepatic hypertrophy occurs with increased cytochrome P450 (CYP) mRNA expression in young rats. In the present

study, to clarify whether these actions of GBE are observed in older rats, we investigated cardiovascular functions and hepatic CYP protein expressions in aged SHR fed a control LSD1 inhibitor diet or a diet containing 0.5% GBE for 4 weeks. In aged SHR, GRE feeding significantly increased liver weight per 100g body weight without changing the body weight. Furthermore, significant increases in alanine aminotransferase level in serum and marked increase in CYP2B protein expression in the liver were observed in aged SHR fed GBE. On the other hand, GBE feeding did not affect blood pressure, but significantly reduced heart rate and blood How velocity in tail arteries of aged SHR. Furthermore, GBE feeding did not affect contractile response to phenylephrine, relaxation responses to not

SU5402 mw only sodium nitroprusside but also acetylcholine, and protein levels of endothelium nitric oxide synthase and soluble guanylate cyclase in aortas of aged SHR. These results suggested that long-term GBE feeding impairs peripheral circulation due to bradycardia and hepatic function in aged SHR. Thus, in the elderly population with hypertension, the use of GBE may need to be assessed for effects on heart rate and liver function.”
“A novel series of matriptase inhibitors based on previously identified tribasic 3-amidinophenylalanine derivatives was prepared. The C-terminal basic group was replaced 4SC-202 molecular weight by neutral residues to reduce the hydrophilicity of the

inhibitors. The most potent compound 22 inhibits matriptase with a K(i) value of 0.43 nM, but lacks selectivity towards factor Xa. By combination with neutral N-terminal sulfonyl residues several potent thrombin inhibitors were identified, which had reduced matriptase affinity. (C) 2009 Elsevier Ltd. All rights reserved.”
“The resting membrane potential (RMP) of most cells is not greatly influenced by the transmembrane calcium gradient because at rest, the membrane has very low permeability to calcium. We have observed, however, that the resting membrane potential of muscle cells in the larval bodywall of Drosophila melanogaster varies widely as the external calcium concentration is modified. The RMP depolarized as much as 21.8 mV/mM calcium at low concentrations, and on average, about 10 mV/mM across a range typical of neurophysiological investigations.

Although RUNX1 is not required for the maintenance of hematopoiet

Although RUNX1 is not required for the maintenance of hematopoietic stem cells, it is required for the homeostasis of hematopoietic Semaxanib price stem and progenitor cells, and expansion of hematopoietic stem and progenitor cells due to RUNX1 deletion may be an important cause of human leukemias. Molecular abnormalities cooperating with loss of RUNX1 have also been identified. These findings may lead to a further understanding of human leukemias,

and suggest novel molecular targeted therapies in the near future.”
“OBJECTIVES: The purpose of this study was to evaluate the effect of alendronates on healing of extraction sockets and healing around implants in the maxilla of rats.\n\nMATERIALS AND METHODS: Twenty-four Sprague-Dawley rats were used. The rats in bisphosphonate group were subcutaneously injected with alendronate (5.0 mg kg(-1)) three times a week for 4 weeks. Both sides of the maxillary first molars were extracted, and customized titanium implants (empty set1.5 x 2.0 mm) were placed immediately into one side. Rats were killed at 3, 7, 14, or 28 days following surgery.\n\nRESULTS: New bone formation in extraction sockets, bone area around the implant site, and bone-implant contact were not delayed

in 5-Fluoracil mouse the bisphosphonate group. The tartrate-resistant acid phosphatase positive cell count did not differ between bisphosphonate and control groups; however, empty lacunae were observed significantly more in bisphosphonate group. The differences in empty lacunae were shown at different time

points between the implant sites and extraction sites: at 7 days after extraction, and at 14 and 28 days after implantation.\n\nCONCLUSIONS: Alendronates seemed to decrease bone resorption but not to decrease bone formation. Empty lacunae were observed significantly more at later time points in implant sites compared to extraction sockets. Oral Diseases (2011) 17, 705-711″
“A right-sided Adriamycin aortic arch with an aneurysm of the aberrant subclavian artery is a rare disease. We report a case of Kommerell’s diverticulum of an aberrant left subclavian artery in a patient with a right-sided aortic arch. Fewer than 50 cases have been reported in the literature. A number of operative strategies are described. Right thoracotomy provides good exposure and avoids the morbidity associated with bilateral thoracotomy or sternotomy and thoracotomy. In our patient with symptoms of dysphagia, syncope, and left subclavian steal syndrome, a left thoracotomy was used. The repair was accomplished by division of a left ligamentum arteriosum, obliteration of the Kommerell’s aneurysm, and an aorto-subclavian bypass. Postoperative complications included left vocal cord palsy and Horner’s syndrome. Hoarseness and left ptosis recovered spontaneously 3 months after surgery, and the patient remained symptom-free at the 1-year follow-up. We believe a left thoracotomy for direct repair of Kommerell’s diverticulum is a simple and safe method without the increased morbidity found in other procedures.

AimTo assess whether oxidative stress has a greater role in g

\n\nAimTo assess whether oxidative stress has a greater role in generalized than in localized vitiligo.\n\nMethodsWe assessed 31 patients with active vitiligo (17 localized, 14 generalized) and 38 healthy controls. Serum total oxidant status (TOS), total antioxidant status (TAS) and oxidative stress index (OSI) were determined.\n\nResultsPatients with vitiligo had significantly lower TAS and higher TOS and OSI values than controls. Both localized and generalized vitiligo were associated with lower TAS CFTRinh-172 ic50 and higher TOS and OSI values, compared with controls, and all three did not differ with vitiligo type.\n\nConclusionsA systemic oxidative

stress exists in patients with vitiligo. These results indicate that the global antioxidant capacity of patients might have been exhausted through a defence mechanism against oxidative processes. The imbalance in TOS/TAS status may have an important role in the aetiopathogenesis of vitiligo, regardless of the clinical variant of the disease.”
“Treatment of diabetic mice with glibenclamide and crude extract (BE) significantly declined the FBG content. However, amongst the 6 isolated compounds, 3 compounds (C1, C4 and C6) appreciably subsided the exaggerated level of FBG. Simultaneously, glibenclamide,

BE, C4 and C6 treatment markedly enhanced the hepatic selleck chemicals llc glycogen content as compared to diabetic control group. Administration of crude extract, C4, C5 and C6 also exerted a protective effect on the declined activity of SOD, CAT and GSH-Px in the three tissues. However, all the herbal treatments produced a pronounced escalation in GSH content. Contrarily the elevated level of hepatic, pancreatic and renal TBARS monitored in diabetic animals was significantly diminished in treated groups of animals. Alloxan administration severely deteriorated the structure of liver and pancreas of diabetic mice, which was found to Quizartinib purchase be restored to a certain extent in glibenclamide, BE and C6 treated animals. Identification of the most potent antihyperglycernic compound C6 by

HPLC confirmed its triterpene nature. C6 was then further characterized via various spectroscopic methods (IR, NMR and Mass) that revealed its similarity with laccijalaric ester-I, a triterpene present in soft resin of B. monosperma seeds.”
“A homologous series of soluble photoluminescent polyesters, namely polybis(4-hydroxybenzylidene)acetone-5-(m-alkyloxyisophthalate), PAI1-PAI5 were designed and synthesized via polycondensation reaction. The branches of these polyesters consisted of flexible alkyloxy chains with different chain lengths in order to investigate their influence toward thermal stability as well as the photocrosslinking property. It was found that increasing length of the flexible chain would reduce the thermal stability of the polyesters.