01), Quid Pro Quo (P<0.0001), and Health Consequences (P<0.0001) expectations. The LDEQ has promise in evaluating donor candidates’ expectations.”
“Context: Pentacyclic triterpenes, mainly, asiatic acid, madecassic acid, asiaticoside, and madecassoside are the active constituents
of Centella asitica (L.) Urban. (Apiaceae). These compounds possess various pharmacological activities that have been WH-4-023 manufacturer shown to assist with wound healing and brain enrichment.\n\nObjective: Determination of these active pentacyclic triterpenes in extracts from the various parts of C. asiatica plants harvested at different times of the year and grown in different environments.\n\nMaterials and methods: The separate plant parts selected were leaves, stolons, petioles, flowers, fruits, and nodes with roots. Dried powder from each part was extracted with ethanol by microwave-assisted extraction and subjected to determination of their content of the four pentacyclic triterpenes using a HPLC method. The effects of the places of cultivation as well as harvesting periods on the content of the four pentacyclic triterpenes in the extracts
were also determined.\n\nResults and discussion: Among the various parts of C. asiatica, the leaves contained the highest amount of pentacyclic triterpenes with a total content of pentacyclic triterpenes of 19.5 mg/g dry powder. However, the contents of the pentacyclic triterpenes in C. asiatica varied according to the place of cultivation and the harvesting period. C. asiatica collected from Trang, Thailand gave the highest content of total pentacyclic https://www.selleckchem.com/products/PD-98059.html triterpenes (37.2 mg/g dry powder) when harvested in March, while those collected from Songkhla, Thailand gave the highest value (37.4 mg/g dry powder) when collected in December. C. asiatica collected from Nakornsrithammarat and Ratchaburi, Thailand gave the lowest content of total pentacyclic triterpenes in all experimental harvesting periods.”
(AMELX) and matrix metalloproteinase-20 (MMP20) are essential find more for proper enamel development. Amelx and Mmp20 mutations cause amelogenesis imperfecta. MMP20, a protease secreted by ameloblasts, is responsible for processing enamel proteins, including AMELX, during the secretory stage of enamel formation. Of at least 16 different amelogenin splice products, the most abundant isoform found in murine ameloblasts and developing enamel is the M180 protein. To understand the role of MMP20 processing of M180 AMELX, we generated AmelxKO/Mmp20KO (DKO) mice with an amelogenin (M180Tg) transgene. We analyzed the enamel phenotype by SEM to determine enamel structure and thickness, mu CT, and by nanoindentation to quantify enamel mechanical properties. M180Tg/DKO mouse enamel had 37% of the hardness of M180Tg/AmelxKO teeth and demonstrated a complete lack of normal prismatic architecture.
Findings supported hypotheses in hamsters that gastrointestinal https://www.selleckchem.com/products/sis3.html lesions are likely of brainstem origin. Ultrastructurally, virus-associated cytoplasmic vesicular or crystalline structures, or amorphous structures, were found to label IHC positive
in control-positive avian cardiomyocytes and mouse thalamic neurons, respectively, and WNV-like 50-nm particles, which were scarce, did not label.”
“Aspartate-594 is the third most common BRAF residue mutated in human cancer. Mutants of this residue are kinase inactive, and the mechanism(s) by which they contribute to cancer has remained perplexing. Using a conditional knock-in mouse model, we show that the (D594A)Braf mutant does not drive tumor development per se but is able to induce aneuploidy in murine splenocytes and mouse embryonic fibroblasts and contributes to immortalization through the propagation of aneuploid cells. (D594A)Braf lacks kinase activity but induces the related gene product Craf as well as the mitogen-activated protein/extracellular signal-regulated kinase (ERK)
kinase (MEK)/ERK pathway. Here, we show that the aneuploid phenotype is dependent on Craf. Treatment with the MEK inhibitor Nutlin-3 order U0126 did not attenuate the emergence of aneuploidy but prevented the growth of aneuploid cells. These results provide a previously unidentified link between Craf and chromosomal stability, with important implications for our understanding of the development of cancers with driver mutations that hyperactivate Craf. Cancer Res; 70(21); 8475-86. (C)2010 AACR.”
“A series of novel cyclic amine-substituted benzoic acid derivatives were synthesized and evaluated for
their PPAR alpha agonist activity. Strucure-activity relationship studies led to the identification of (S)-3-[3[2-(4-chlorophenyl)-4-methylthyazole-5-carboxamido] piperidin-1-yl] benzoic Milciclib mouse acid (S)-4f (KRP-105) as a potent and high subtype-selective human PPARa agonist. (S)-4f showed excellent PK profile and oral administration of (S)-4f to high-fat diet dogs effectively lowered triglycerides. (C) 2011 Elsevier Ltd. All rights reserved.”
“In support of a program to develop a treatment for depression, four labeled forms of a delta opioid agonist were prepared. The [2H4] labeled form was prepared using a relatively straightforward conversion of [2H4]bromoethanol to [2H4]N-methyl-2-hydroxyethylamine. The key step in the synthesis of the [2H6] labeled form involved the Pd-catalyzed exchange in D2O of 8-quinolin-8-ol to give [2H6] 8-quinolin-8-ol. The C-14 labeled form was synthesized in one step using [14C]carbonylation, and the C-11 labeled form was prepared in two steps from 11CH3I. Copyright (C) 2011 John Wiley & Sons, Ltd.”
“Stereoselective construction of 1,2-cis-beta-L-rhamnopyranoside was achieved by our effective methodology using naphthylmethyl (NAP) ether-mediated intramolecular aglycon delivery (IAD).
We proposed that the uncontrolled cellular uptake of alcohol results in yeast ‘hyper-respiration’, leading to elaboration of hemolytic molecules such as hydrogen peroxide and lytic lipids. In the current study, we have further analyzed the molecular mechanisms involved in the MACH phenomenon in S. cerevisiae, using DNA microarrays. The patterns of regulation were confirmed by quantitative reverse transcriptase PCR. The results presented here lend further support to this hypothesis, based on upregulation of the genes responsible for coping with vast amounts
of hydrogen peroxide produced as a byproduct of excessive oxidation of alcohol. These results, taken together, show that alcohol-mediated hemolysis in yeast appears to be related to the overproduction of hemolytic byproducts, particularly hydrogen peroxide, which accumulates during long-term exposure of S. cerevisiae to both ethanol and n-butanol.”
“Defective endosperm (De*)-B30 is a dominant BI 2536 nmr maize mutation in the gene that encodes the storage protein, a-zein protein. The De*-B30 mutation results in a defective signal peptide in a 19-kD alpha-zein protein, which triggers endoplasmic reticulum (ER) stress, leading to up-regulation of genes associated with the unfolded protein response. To extend our
knowledge of the physiological responses to constitutive ER stress in plants, transgenic Arabidopsis plants were constructed, in which De*-B30 transcripts were constitutively expressed under the control of the CaMV 35S promoter. PR 171 Transgenic plants exhibited pale green leaves and growth retardation during the early vegetative stage. In addition, the growth rate of hypocotyl elongation was depressed in dark-gown transgenic seedlings. However, RNA blot analyses revealed no induction
of the ER stress-inducible see more genes, including AtBiP1, AtCNX1, and AtCRT1 in transgenic Arabidopsis plants. Even though transgenic plants also were revealed to retain wildtype level of tunicamycin sensitivity, they showed an increase in hydrogen peroxide production. Higher levels of AtGST1 gene expression in transgenic plants were revealed. These findings suggest that reactive oxygen species are involved in the response to constitutive ER stress in Arabidopsis.”
“[Purpose] The aim of this study was to identify how the lumbar stabilizer muscles respond to increased lifting loads. Twenty-four healthy subjects (10 males, 14 females) participated in this study. [Subjects and Methods] The thicknesses of the internal oblique (JO), transverse abdominis (TrA), and lumbar multifidus (LM) muscle were measured by ultrasonography during lifting of loads 10%, 20%, and 30% of body weight. The data was analyzed measured by one-way repeated measures analysis of variance (ANOVA). [Results] There were statistically significant increases in thicknesses of the TrA and LM muscles when lifting a load of 20% of subject’s body weight.
This article reviews the background and reemergence of WNF in Israel; the recent
epidemiology of WNF among Israelis; and the disease-control strategies being used to combat the disease. Methods: Employing the comprehensive base of case data that are reported to the Ministry of Health, an epidemiological record was constructed that details the incidence and distribution of WNF cases in Israel in recent years. Results: After decades of small, intermittent outbreaks, nearly 1400 cases of WNF were reported in Israel between 2000 and 2012. Incidence was consistently highest in the coastal cities, among elderly patients, and in the late summer months and early autumn. A broad range of control measures to prevent human infection has been implemented, and attention has been given to issues such as the protection of the national blood bank and the occurrence of long-term sequelae. Conclusions: The reemergence of WNF in ALK inhibitor review Israel is likely the result of a combination of factors including past immunity to the virus among the human population, a marked increase in awareness of WNF among physicians, and more frequent requests for the laboratory testing of suspected cases. In the absence of effective vaccine to protect humans from WNF, the best disease-control strategies include intensive vector-control measures,
the continued development of techniques to forecast outbreaks, and effective public education programs ATM/ATR inhibition that are targeted toward the high-risk elderly population. (C) 2013 The British Infection Association. Published by Elsevier Ltd. All rights reserved.”
“The generalized entropy theory is applied to assess the joint influence of the microscopic cohesive energy and chain stiffness on glass formation in: polymer melts using a minimal model containing a single bending energy and a single (monomer averaged) nearest neighbor van der Waals energy.
Selleck 3MA The analysis focuses on the combined impact of the microscopic cohesive energy and chain stiffness on the magnitudes of the isobaric fragility parameter m(p) and the glass transition temperature T-g. The computations imply that polymers with rigid structures and weak nearest neighbor interactions are the most fragile, while T-g becomes larger when the chains are stiffer and/or nearest neighbor interactions are stronger. Two simple fitting formulas summarize the computations describing the dependence of M-p and T-g on the microscopic cohesive and bending energies. The consideration of the combined influence of the microscopic cohesive and bending energies leads to the identification of some important design concepts, such as iso-fragility and iso-T-g lines, where, for instance, iso-fragility lines are contours with constant mp but variable T-g. Several thermodynamic properties are found to remain invariant along the iso-fragility lines, while no special characteristics are detected along the iso-T-g lines.
(Danio rerio) embryos are transparent and advantageous for studying early developmental changes due to ex utero development, making them an appropriate model for studying gene expression changes as a result of molecular targeting. Zebrafish embryos were injected with a previously reported G-quadruplex selective ligand, and the phenotypic changes were recorded. We report marked discrepancies in the development of intersegmental vessels. In silico analysis determined that the putative G-quadruplex motif occur in the upstream promoter region of the Cdh5 (N-cadherin) gene. A real-time polymerase chain reaction-based investigation indicated that in zebrafish, CDH-2 www.selleckchem.com/products/epz004777.html (ZN-cad) was significantly downregulated in the ligand-treated embryos. Biophysical characterization of the interaction LY2090314 solubility dmso of the ligand with the G-quadruplex motif found in this promoter yielded strong binding and stabilization of the G-quadruplex with this ligand. Hence, we report for the first time the phenotypic impact of G-quadruplex targeting with a ligand in a vertebrate organism. This study has unveiled not only G-quadruplex targeting in non-human animal species but also
the potential that G-quadruplexes can provide a ready tool for understanding the phenotypic effects of targeting certain important genes involved in differentiation and developmental processes in a living eukaryotic organism.”
“Objective To verify if I-123-FP-CIT, DaTSCAN (R) can differentiate early stages of Parkinson’s disease (PD) as well as patients with Atypical Parkinsonian syndromes (APS) from manifest Parkinson’s disease. Methods 128 consecutive patients were investigated with I-123-FP-CIT SPECT during a 4-year period. All patients were diagnosed according to the established consensus criteria for diagnosis of PD (n = 53) selleck compound library and APS (n = 19). Remaining patients were grouped early PD (before onset of L-DOPA medication),
(n = 20), vascular PD (n = 6), and non-PD syndromes (n = 30) and SWEDD (n = 1). SPECT images were analyzed visually according to a predefined ranking scale of dopaminergic nerve cell degeneration, distinguishing a posterior-anterior degeneration pattern (egg shape) from a more global and severe degeneration pattern (burst striatum). Striatum uptake ratios were quantitatively analyzed with the 3D software, EXINI. Results In the group of APS patients, the burst striatum pattern was most frequent and found in 61 % (11/18 patients). In PD patients, the egg shape pattern was dominating, especially in early PD where it was present in 95 % (19/20 patients). The positive predictive value for the egg shape pattern to diagnose PD was 92 % in this material (APS and all PD patients) and the specificity 90 % for the burst striatum pattern to exclude APS. The uptake ratios were reduced in both PD and APS patients and closely related to the image ranking.
In both midgut regions, find more elimination
of the excretory material occurs by apocrine secretion or by discharging of apical cell fragments (loaded with lysosomes) into the gut lumen. The formation of guanine granules occurs inside the lysosomes of PMG epithelial cells thus having much in common with intracellular digestion. Peculiarities of intracellular blood digestion were analyzed according to the modern hypothesis of endocytosis and compared to what is known in ticks. (C) 2013 Elsevier Ltd. All rights reserved.”
“In the past 10 years, electronic health records (EHRs) have had growing impact in clinical care. EHRs efficiently capture and reuse clinical information, which can directly benefit patient care by guiding treatments and providing effective reminders for best practices. The increased adoption has also lead to more complex implementations, including robust, disease-specific tools, such as for rheumatoid arthritis (RA). In addition, the data collected through normal clinical care is also used in secondary research, helping to refine patient treatment for the future. Although few studies have directly demonstrated benefits for direct clinical care of RA, the opposite is true for EHR-based research – RA has been a particularly fertile
ground for clinical and genomic research that have leveraged typically advanced selleck chemicals llc informatics methods to accurately define RA populations. We discuss the clinical impact of EHRs in RA treatment and their impact on secondary research, and provide recommendations for improved Quisinostat ic50 utility in future EHR installations.”
“1-Hydrazino-3-thioxo-5,6,7,8-tetrahydroisoquinoline-4-carbonitrile (3) was subjected to react with bifunctional
compounds namely: acetylacetone, ethyl cyanoacetate, ethyl benzoylactate, diethylmalonate and ethyl acetoacetate to produce pyrazololthienotetrahydroisoquinoline derivatives 6-11. Also, heating of compound (3) with formic acid afforded triazolothienotetrahydroisoquinoline compound 5 which reacted with a-halogenated compounds to afford compounds 13a-e. Compound 13c when heated with triethylorthoformate afforded triazolo derivative 14. Also, compound 6 was used for synthesizing compounds 18-20. Representative compounds of the synthesized triazolo and pyrazolothienotetrahydroisoquinoline products were tested and evaluated as antimicrobial agents. (C) 2010 Elsevier Masson SAS. All rights reserved.”
“Extracellular matrix plays a critical role in cellular development by providing signaling cues that direct morphogenesis. In order to study both the cues that natural matrix provides and endothelial cell responses to that information, human fetal lung fibroblasts were used to produce a fibrous three-dimensional matrix. Following the removal of the fibroblasts by detergent extraction, protein and proteoglycan constituents of the remaining matrix were identified by immunofluorescence and immunoblotting.
1 is the first example of a taxane HIF inhibitor with 13-glycosidic linkage.”
“A new potential approximation known as modified Becke-Johnson based on density functional theory is applied to compute the electronic band profile and optical response of CdIn2O4, CdGa2O4 and CdAl2O4 compounds. The direct band gap with common LDA, GGA and EV-GGA is drastically underestimated compared with modified Becke-Johnson approximation, whose results are significantly closer to the experimental findings. The optical properties like dielectric constant, refractive index, reflectivity, optical conductivity and absorption coefficient are also computed. A unique characteristic associated with cation replacement is studied; the replacement of cation In by Ga and Ga by Al significantly reduces the direct energy band gap in these compounds. This variation is of crucial importance for band gap dependent optical properties of these compounds, which is also proof for applications of these compounds in optoelectronic devices.”
“Injectable drug nanocarriers have greatly benefited in their clinical development from the addition of a superficial hydrophilic corona to improve their cargo pharmacokinetics. The most studied and used polymer for this purpose is poly(ethylene glycol), PEG. However, in spite of its wide use for over two decades now, there is no general consensus on the optimum PEG chain coverage-density and
size required to escape from the mononuclear phagocyte system and to extend the
circulation time. Moreover, cellular uptake and active targeting may have conflicting requirements in terms of surface properties of the nanocarriers which Compound Library high throughput complicate even more the optimization process. These persistent issues can be largely attributed to the lack of straightforward characterization techniques to assess the coverage-density, the conformation or 17DMAG mw the thickness of a PEG layer grafted or adsorbed on a particulate drug carrier and is certainly one of the main reasons why so few clinical applications involving PEG coated particle-based drug delivery systems are under clinical trial so far. The objective of this review is to provide the reader with a brief description of the most relevant techniques used to assess qualitatively or quantitatively PEG chain coverage-density, conformation and layer thickness on polymeric nanoparticles. Emphasis has been made on polymeric particle (solid core) either made of copolymers containing PEG chains or modified after particle formation. Advantages and limitations of each technique are presented as well as methods to calculate PEG coverage-density and to investigate PEG chains conformation on the NP surface. (C) 2014 Elsevier B.V. All rights reserved.”
“Background: In 2010, Nicaragua became the first developing nation to add 13-valent pneumococcal conjugate vaccine (PCV-13) to its national immunization schedule, using a “3+0″ dosing schedule.
The proportions of patients reporting clinically relevant pain reduction (>= 50%) were calculated overall and for specific
subgroups. The risk ratio comparing patients with osteoarthritis to those without osteoarthritis was calculated. Analysis of variance was used to compare outcomes between subgroups of patients based on injection site. The unpaired Student t test was used to compare responses of men versus women, those with and without a diagnosis of osteoarthritis, and more experienced versus less experienced radiologists.\n\nRESULTS. Sixty-four AG-881 mouse percent of patients (224/348) reported clinically relevant pain reduction. The average decrease overall was 56% (SD, 36). Injections into the Lisfranc articulation were significantly more effective (61% pain reduction, p = 0.007) compared with other
sites, with 74% of patients obtaining clinically relevant pain relief. Patients with osteoarthritis reported more relief (62%) compared with those without (50%, p = 0.002). No difference in outcomes comparing musculoskeletal radiologists with residents or fellows this website in training was found.\n\nCONCLUSION. Nearly two thirds of patients receiving imaging-guided injections into the foot articulations reported clinically relevant pain reduction. Lisfranc joint injections and patients with a diagnosis of osteoarthritis responded better.”
“Background and purpose: As baclofen is active in patients with anxiety disorders, GABA(B) receptors have been implicated in the modulation of anxiety. To avoid the side effects of baclofen, allosteric enhancers of GABA(B) receptors have been studied to provide an alternative therapeutic
avenue for modulation of GABA(B) receptors. The aim of this study was to characterize derivatives of (R,S)-5,7-di-tert-butyl-3-hydroxy-3-trifluoromethyl-3H-benzofuran-2-one (rac-BHFF) as enhancers of GABA(B) receptors.\n\nExperimental approach: Enhancing properties of rac-BHFF were assessed in the Chinese hamster ovary (CHO)-G alpha 16-hGABA(B(1a,2a)) cells U0126 cell line by Fluorometric Imaging Plate Reader and GTP gamma[(35)S]-binding assays, and in rat hippocampal slices by population spike (PS) recordings. In vivo activities of rac-BHFF were assessed using the loss of righting reflex (LRR) and stress-induced hyperthermia (SIH) models.\n\nKey results: In GTP gamma[(35)S]-binding assays, 0.3 mu M rac-BHFF or its pure enantiomer (+)-BHFF shifted the GABA concentration response curve to the left, an effect that resulted in a large increase in both GABA potency (by 15.3- and 87.3-fold) and efficacy (149% and 181%), respectively. In hippocampal slices, rac-BHFF enhanced baclofen-induced inhibition of PS of CA1 pyramidal cells. In an in vivo mechanism-based model in mice, rac-BHFF increased dose-dependently the LRR induced by baclofen with a minimum effective dose of 3mg kg(-1) p.o. rac-BHFF (100mgkg(-1) p.o.
(C) 2012 Elsevier B.V. All rights reserved.”
“Purpose/Objective(s): To determine if intensity modulated radiation therapy (IMRT) in the post-operative setting for gastric cancer was associated with reduced toxicity compared to 3D conformal radiation therapy (3DCRT). Materials/Methods: This retrospective study includes 24 patients with stage IB-IIIB gastric cancer consecutively treated from 2001-2010. All underwent surgery followed by adjuvant chemoradiation. Concurrent chemotherapy consisted of 5-FU/leucovorin (n = 21), epirubicin/cisplatin/5FU (n =
DZNeP in vivo 1), or none (n = 2). IMRT was utilized in 12 patients and 3DCRT in 12 patients. For both groups, the target volume included the tumor bed, anastomosis, gastric stump, and regional lymphatics. Results: Median follow-up for the entire cohort was 19 months (range 0.4-8.5 years), and 49 months (0.5-8.5 years) in surviving patients. The 3DCRT group received a median dose of 45 Gy, and the IMRT group received a median dose of 50.4 Gy (p = 0.0004). For the entire cohort, 3-year overall survival (OS) was 40% and 3-year disease free survival (DFS) was 41%. OS and DFS did not differ significantly between the groups. Acute toxicity was similar. Between 3DCRT and IMRT groups, during radiotherapy, median weight lost (3.2 vs. 3.3 kg, respectively; p = 0.47) and median percent weight loss were similar (5.0% vs. 4.3%, respectively; p = 0.43). Acute grade 2 toxicity was experienced by 8 patients
receiving 3DCRT and 11 receiving IMRT (p = 0.32); acute grade 3 toxicity occurred in 1 patient receiving www.selleckchem.com/products/sbe-b-cd.html 3DCRT and none receiving IMRT (p = 1.0). No patients in either cohort experienced late grade 3 toxicity, including renal or gastrointestinal toxicity. At last follow up, the median increase in creatinine was 0.1 mg/dL in the IMRT group and 0.1 mg/dL in the 3DCRT group (p = 0.78). Conclusion: This study demonstrates that adjuvant chemoradiation for gastric cancer with IMRT to 50.4 Gy was well-tolerated and compared similarly in toxicity with 3DCRT to 45 Gy.”
“Supercooled liquids are proposed to be dynamically heterogeneous, with regions exhibiting
relaxation time scales that vary in space and time. Measurement of the distribution of such time scales could be an important test of various proposed TPCA-1 cost theories of vitrification. Single molecule fluorescence experiments attempt to uncover this distribution, typically by embedding single molecule probes into these systems and monitoring their individual rotational relaxations from a computed autocorrelation function (ACF). These ACFs may exhibit stretched exponential decays, with the value of the stretching exponent assumed to report the set of dynamical environments explored by the probe. Here, we use simulated trajectories of rotation to investigate how the time scale of dynamic exchange relative to underlying relaxation time scales in the system affects probe ability to report the distribution relaxation of time scales present.
We reviewed 15 upper extremities in 14 patients with brachial plexus injuries caused by anterior shoulder dislocation. Two-thirds of the cases had total brachial plexus palsy. With the conservative treatment, the motor recoveries of all cases are full or nearly full within 20 months except
intrinsic muscle of the hand. Intrinsic muscle recovery may be better in a younger age group (less than 50 years). Nerve exploration is usually unnecessary. However, reconstructive surgery for the residual neurological deficit can provide improvement of hand function. (C) 2009 Elsevier Ltd. All rights reserved.”
“Glutamate is the primary excitatory transmitter of sensory transmission and perception in the central nervous system. Painful or noxious stimuli from the periphery ‘teach’ humans and animals to avoid potentially dangerous objects AZD4547 manufacturer or environments, whereas tissue injury itself
Vactosertib causes unnecessary chronic pain that can even last for long periods of time. Conventional pain medicines often fail to control chronic pain. Recent neurobiological studies suggest that synaptic plasticity taking place in sensory pathways, from spinal dorsal horn to cortical areas, contributes to chronic pain. Injuries trigger long-term potentiation of synaptic transmission in the spinal cord dorsal horn and anterior cingulate cortex, and such persistent potentiation does not require continuous neuronal activity from the periphery. At the synaptic level, potentiation of excitatory transmission caused by injuries may be mediated by the enhancement of glutamate release from presynaptic terminals and potentiated postsynaptic responses of AMPA receptors. Preventing, ‘erasing’ or reducing such potentiation may serve as a new mechanism to inhibit chronic pain in patients in the future.”
diurnal birds of prey have historically been placed in a single order due to a number of morphological www.selleckchem.com/products/blz945.html characters, recent molecular phylogenies have suggested that this is a case of convergence rather than homology, with hawks (Accipitridae) and falcons (Falconidae) forming two distantly related groups within birds. The feather lice of birds have often been used as a model for comparing host and parasite phylogenies, and in some cases there is significant congruence between the two. Thus, studying the phylogeny of the lice of diurnal raptors may be of particular interest with respect to the independent evolution of hawks vs. falcons. Using one mitochondrial gene and three nuclear genes, we inferred a phylogeny for the feather louse genus Degeeriella (which are all obligate raptor ectoparasites) and related genera. This phylogeny indicated that Degeeriella is polyphyletic, with lice from falcons vs. hawks forming two distinct clades.