Advantage of ostarine over raloxifene and their combined treatments for muscle of estrogen-deficient rats.

PURPOSE: Selective androgen (ostarine, OST) and estrogen (raloxifene, RAL) receptor modulators with improved tissue selectivity have been developed as alternatives to hormone replacement therapy. We investigated the combined effects of OST and RAL on muscle tissue in an estrogen-deficient rat model of postmenopausal conditions. METHODS: Three-month-old Sprague Dawley rats were divided into groups: (1) untreated non-ovariectomized rats (Non-OVX), (2) untreated ovariectomized rats (OVX), (3) OVX rats treated with OST, (4) OVX rats treated with RAL, (5) OVX rats treated with OST and RAL. Both compounds were administered in the diet. The average dose received was 0.6 ± 0.1 mg for OST and 11.1 ± 1.2 mg for RAL per kg body weight/day. After thirteen weeks, rat activity, muscle weight, structure, gene expression, and serum markers were analyzed. RESULTS: OST increased muscle weight, capillary ratio, insulin-like growth factor 1 (Igf-1) expression, serum phosphorus, uterine weight. RAL decreased muscle weight, capillary ratio, food intake, serum calcium and increased Igf-1 and Myostatin expression, serum follicle stimulating hormone (FSH). OST + RAL increased muscle nucleus ratio, uterine weight, serum phosphorus, FSH and luteinizing hormone and decreased body and muscle weight, serum calcium. Neither treatment changed muscle fiber size. OVX increased body and muscle weight, decreased uterine weight, serum calcium and magnesium. CONCLUSION: OST had beneficial effects on muscle in OVX rats. Side effects of OST on the uterus and serum electrolytes should be considered before using it for therapeutic purposes. RAL and RAL + OST had less effect on muscle and showed endocrinological side effects on pituitary-gonadal axis.

Clinical outcome after dorso-ventral stabilization of the thoracolumbar and lumbar spine with vertebral body replacement and dorsal stabilization.

PURPOSE: Surgical stabilization of the spine by vertebral body replacement (VBR) is used for spinal disorders such as traumatic fractures to provide an anatomical re-adjustment of the spine to prevent late detrimental effects and pain [1-4]. This study addresses the clinical outcome after a ventral intervention with VBR and bisegmental fusion. METHODS: The study includes 76 patients (mean age: 59.34 ± 15.97; 34 females and 42 males) with fractures in the lower thoracic and lumbar spine. They were selected from patients of our hospital who received an anterolateral VBR surgery on the corresponding lower spine region over a nine-year period. Only patients were examined with X-rays and complete follow-up records. Exclusion criteria were changes due to degeneration and pathological fractures. Patients were divided into two groups, the thoracotomy group (Th10-L1) and the lumbotomy group (L2-5), respectively. Minimum one year after surgery, patients were asked about their well-being using a precasted questionnaire. RESULTS: No significant differences with respect to the subjective impression of the patients concerning their back pain, spinal functional impairment, their general functional status and their quality of life impairment. Unfortunately, however, only a rather modest but significant increase of the post-surgical life quality was reported. CONCLUSIONS: Patients who underwent VBR in the lower thoracic or lumbar spine show modest long-term well-being. The results suggest that injuries to the lower thoracic or lumbar spine requiring vertebral body replacement should be classified as severe injuries since they adversely affect the patients' long-term well-being. TRIAL REGISTRATION: Study of clinical outcome of patients after vertebral body replacement of the ventral thoracal and lumbal spine, DRKS00031452. Registered 10th March 2023 - Prospectively registered. Trial registration number DRKS00031452.

Combination of selective androgen and estrogen receptor modulators in orchiectomized rats.

PURPOSE: Selective androgen and estrogen receptor modulators, ostarine (OST) and raloxifen (RAL), reportedly improve muscle tissue and offer therapeutic approaches to muscle maintenance in the elderly. The present study evaluated the effects of OST and RAL and their combination on musculoskeletal tissue in orchiectomized rats. METHODS: Eight-month-old Sprague Dawley rats were analyzed. Experiment I: (1) Untreated non-orchiectomized rats (Non-ORX), (2) untreated orchiectomized rats (ORX), (3) ORX rats treated with OST during weeks 0-18 (OST-P), (4) ORX rats treated with OST during weeks 12-18 (OST-T). Experiment II: 1) Non-ORX, (2) ORX, 3) OST-P, (4) ORX rats treated with RAL, during weeks 0-18 (RAL-P), 5) ORX rats treated with OST + RAL, weeks 0-18 (OST + RAL-P). The average daily doses of OST and RAL were 0.4 and 7 mg/kg body weight (BW). Weight, fiber size, and capillarization of muscles, gene expression, serum markers and the lumbar vertebral body were analyzed. RESULTS: OST-P exerted favorable effects on muscle weight, expression of myostatin and insulin growth factor-1, but increased prostate weight. OST-T partially improved muscle parameters, showing less effect on the prostate. RAL-P did not show anabolic effects on muscles but improved body constitution by reducing abdominal area, food intake, and BW. OST + RAL-P had an anabolic impact on muscle, reduced androgenic effect on the prostate, and normalized food intake. OST and RAL improved osteoporotic bone. CONCLUSIONS: The OST + RAL treatment appeared to be a promising option in the treatment of androgen-deficient conditions and showed fewer side effects than the respective single treatments.

A combined treatment with selective androgen and estrogen receptor modulators prevents bone loss in orchiectomized rats.

PURPOSE: Enobosarm (EN), a selective androgen receptor modulator and raloxifene (RAL), a selective estrogen receptor modulator, have been shown to improve bone tissue in osteoporotic males. The present study evaluated the effects of a combination therapy of EN and RAL on bone properties in orchiectomized rats compared to the respective single treatments. METHODS: Eight-month-old male Sprague-Dawley rats were either left intact (Non-Orx) or orchiectomized (Orx). The Orx rats were divided into four groups (n = 15 each): 1) Orx, 2) EN treatment (Orx + EN), 3) RAL treatment (Orx + RAL), 4) combined treatment (Orx + EN + RAL). EN and RAL (0.4 mg and 7 mg/kg body weight/day) were applied immediately after Orx with a soy-free pelleted diet for up to 18 weeks. The lumbar spine and femora were examined by micro-CT, biomechanical, histomorphological, ashing, and gene expression analyses. RESULTS: EN exhibited an anabolic effect on bone, improving some of its parameters in Orx rats, but did not affect biomechanical properties. RAL exhibited antiresorptive activity, maintaining the biomechanical and trabecular parameters of Orx rats at the levels of Non-Orx rats. EN + RAL exerted a stronger effect than the single treatments, improving most of the bone parameters. Liver weight increased after all treatments; the kidney, prostate, and levator ani muscle weights increased after EN and EN + RAL treatments. BW was reduced due to a decreased food intake in the Orx + RAL group and due a reduced visceral fat weight in the Orx + EN + RAL group. CONCLUSION: The EN + RAL treatment appeared to be promising in preventing male osteoporosis, but given the observed side effects on liver, kidney, and prostate weights, it requires further investigation.

C-reactive protein in spinal surgery: more predictive than prehistoric.

PURPOSE: In spinal surgery, surgical site infections (SSI) after dorsal spondylodesis lead to severe short- and long-term complications. Despite various clinical and serological evidence, the detection of a postoperative SSI remains crucial. In this retrospective cohort study, we determined the prognostic value of C-reactive protein (CRP) kinetics after open reduction and dorsal spondylodesis in the development of a SSI. METHODS: We retrospectively analyzed 192 patients from 2016 to 2018 undergoing open reduction and dorsal spondylodesis with and without SSI for 20 days at a level-I trauma center and assessed their serological and clinical characteristics. RESULTS: On day 7 and 8 after surgery, patients who developed a SSI displayed significantly higher CRP levels. A second peak after the initial maximum of CRP and a restricted failure to decline as well as a maximum CRP of more than 225 mg/l predict an infectious complication with a sensitivity of 92.9%, and a specificity of 78.2%. A binary logistic regression leads to 85.7% and 69.7%, respectively. A one-phase decay exponential regression can predict 75.6% of the variance after the initial peak of CRP. CONCLUSION: Our study demonstrates a high value of postoperative CRP kinetics in SSI detection after dorsal spondylodesis. Moreover, we observed typical CRP levels with a specific course as indicative predictors that may facilitate an early SSI detection in clinical practice.

[Complication rate after femoral shaft fractures in childhood and adolescence depending on patient factors and treatment measures]. / Die Komplikationsrate nach Femurschaftfrakturen im Kindes- und Jugendalter in Abhängigkeit von Patientenfaktoren und Behandlungsmaßnahmen.

BACKGROUND: The treatment of pediatric femoral shaft fractures has undergone an increasing change in recent years. The previously predominant treatment procedures were extensively replaced by minimally invasive techniques (e.g. elastic stable intramedullary nailing, ESIN). The aim of this study was the comparison of complication rates depending on patient factors as well as various treatment procedures. MATERIAL AND METHODS: This study involved a retrospective X­ray morphometric evaluation of data. The patient files and X­rays of 101 children who were treated at 2 level I trauma centers were analyzed. RESULTS: Conservative treatment was carried out in 19% of the cases. Among the surgical procedures the ESIN technique was predominant (n = 60). Complications that needed revision occurred in 10% of the children after conservative treatment. Revision surgery had to be carried out in more than 6% of the cases in children who were surgically treated. Among the surgical procedures ESIN stabilization demonstrated the lowest revision rate with only 3%. Children under three years and adolescents had a higher risk for developing complications. If the ESIN wires used were too thin in relation to the diameter of the medullary cavity there was an increased probability of complications of around 30%. CONCLUSION: This study revealed a moderate risk of complications in the treatment of femoral shaft fractures in children. The risk of complications after external fixation and conservative treatment was the highest in this study. Overall, the ESIN technique showed the lowest risk of complications. The results of this study could confirm the known limitations of the ESIN technique depending on age and body weight.

Functional and molecular immune response of Mediterranean mussel (Mytilus galloprovincialis) haemocytes against pathogen-associated molecular patterns and bacteria.

The effect of live bacteria (Micrococcus lysodeikticus and Vibrio anguillarum), and PAMPs (poly I:C, zymosan, LPS, LTA and CpG) on the production of intermediate toxic radicals (respiratory burst activity and production of nitric oxide) and mytilin B, myticin C and lysozyme gene expression was studied in vivo and in vitro. In vitro, bacteria were able to modulate the haemocytes' respiratory burst activity, being significantly increased after 6 h of incubation. The effect of pathogen-associated molecular patterns (PAMPs) was also studied. Zymosan produced an increase of the PMA-mediated response but an inhibition of the zymosan-mediated response. A significant increase of nitric oxide production was found at all the sampled time points (1, 3 and 6 h) in comparison with controls on both, the Gram-positive and Gram-negative bacteria. The in vivo responses measured on haemocytes after M. lysodeikticus injection were faster than those induced by V. anguillarum. However, V. anguillarum induced stronger in vitro effects. Mytilin B, myticin C and lysozyme in vitro gene expression, occurred at short times after infection. The maximum in vitro expression was detected 3 h post-infection. The differences between M. lysodeikticus and V. anguillarum in different measured parameters may suggest that different signalling pathways might be involved. Moreover, among all assayed PAMPs, LPS elicited the highest response.

Application of voxel phantoms in whole-body counting for the validation of calibration phantoms and the assessment of uncertainties.

This article is dedicated to the application of voxel phantoms in whole-body counting calibration. The first study was performed to validate this approach using IGOR, a physical phantom dedicated to fission and activation product (FAP) measurement, and a graphical user interface, developed at the IRSN internal dose assessment laboratory, called OEDIPE (French acronym for the tool for personalised internal dose assessment) associated with the Monte Carlo code MCNP. The method was validated by comparing the results of real measurements and simulations using voxel phantoms obtained from CT scan images of IGOR. To take this application further, two studies were carried out and are presented in this article. First, a comparison was made between the IGOR voxel based phantom (IGOVOX) and a voxel human body (Zubal Phantom) to confirm whether IGOR could be considered as a realistic representation of a human. Second, the errors made when considering sources homogeneously distributed in the body were assessed against real contamination by taking into account the biokinetic behaviour of the radioactive material for two modes of exposure: the ingestion of 137Cs in soluble form and the inhalation of insoluble 60Co several days after acute incorporation.

[Laparoscopic resection of a giant colon diverticulum : Case report and review of the literature]. / Laparoskopische Resektion eines Riesenkolondivertikels : Fallbericht und Literaturübersicht.

BACKGROUND: Giant diverticula are rare complications of diverticular disease. Current opinion regards operative therapy as the method of choice for the treatment of symptomatic giant diverticula; however, there is neither consensus about the technique nor about the necessary extent of resection. Based on a non-systematic review of the literature, an overview of giant diverticula in terms of epidemiology, pathology and classification is given. The current case is considered with respect to appropriate diagnostic procedures and possible therapeutic options. CASE PRESENTATION: An 80-year-old female patient presented to the emergency department with abdominal pain and dyspnea. A computed tomography scan showed a large gas-filled structure in the upper left abdomen adjacent to the left colon. A giant colonic diverticulum was suspected and laparoscopy was performed. Intraoperatively, the diagnosis of a giant colon diverticulum located at the splenic flexure was confirmed. An unremarkable diverticulosis only was found in the descending colon. The giant diverticulum was treated by an atypical colon wedge resection and the postoperative course was uneventful. DISCUSSION: This case report describes a laparoscopic atypical colon wedge resection as treatment of a giant colon diverticulum. Only four laparoscopic bowel resections in terms of sigmoid resections or hemicolectomy with primary anastomosis have been reported. Minimally invasive surgery can be a valuable alternative to open procedures. In the current case a laparoscopic atypical colon wedge resection was safely performed. This option might be considered as an alternative to extended resections of giant diverticula. Localization of the giant diverticulum and the simultaneous existence of diverticular disease are the main criteria for the decision between the different operative approaches.

Estrone and estradiol C-16 derivatives as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase.

Three series of steroid derivatives, enones 1, enols 2 and saturated alcohols 3, were easily synthesized from estrone according to a sequence of three reactions: an aldol condensation with an aromatic aldehyde (R(a-g)CHO) to afford 1, the carbonyl reduction of 1 to obtain the enol 2, and the double bond reduction of 2 to give 3 with the R(a-g) group 16beta-oriented. All compounds were tested as inhibitors of type 1 17beta-HSD. The inhibitory potency increases in the following order 1<2<3, suggesting that the presence of a flexible 16beta-methylene group allows a better positioning of the aryl moiety. With an IC50 of 0.8 microM, the 16beta-benzyl-E2 (3a) is the best inhibitor in this series.

Interactions between earthworm hemolysins and sheep red blood cell membranes.

The hemolytic activity exhibited by the coelomic fluid of the Annelid Eisenia fetida andrei is mediated by two lipoproteins of mass 40 and 45 kDa, each of them capable of hemolysis. Such an activity is not inhibited by zymosan, inulin or lipopolysaccharide (LPS), nor by hydrazine or methylamine, suggesting that earthworm hemolysins are not related to C3 or C3b complement components. Among the membrane lipids tested (phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, sphingomyelin and cholesterol) only sphingomyelin inhibited hemolysis. The analysis of E.f. andrei proteins bound to sphingomyelin microvesicles, as well as to sheep red blood cell (SRBC) membranes, revealed a polymerization of E.f. andrei 40 kDa and/or 45 kDa hemolysins. Consequently, sphingomyelin appears a likely candidate for hemolytic complex receptor. Electron microscopy observations suggested that the polymerization causes an open channel through the lipid bilayer. As demonstrated using metal ions, heparin, chondroitin sulfate, poly(L-lysine) and protamine chloride, the mode of action of earthworm hemolytic complex is not analogous to that of C9 or perforine.

Structure and differential target sensitivity of the stimulable cytotoxic complex from hemolymph of the Mediterranean mussel Mytilus galloprovincialis.

A cytotoxic protein complex of 320 kDA was isolated from dialyzed plasma of the edible mussel, Mytilus galloprovincialis. Constituted by the assembly of several different proteins, the complex exhibits selective killing against eukaryotic cells, including erythrocytes, mouse tumor cells and protozoan parasites. High variability, which was not correlated with protein concentration, suggested that the immune response of naive mussels was in various stages of activation. Stimulation assays by different treatments in vivo resulted in significant increases in the activity of the plasma suggesting that cytotoxic complexes are involved in immune defense. Lytic activity appears to involve binding of cytotoxic complexes onto target cell membranes and the formation of transmembrane pores. This research provides more evidence that the innate immune system of invertebrates involves large cytotoxic proteins with a broad range of recognitive specificities in addition to small antibacterial, antifungal peptides.

Estradiol-adenosine hybrid compounds designed to inhibit type 1 17beta-hydroxysteroid dehydrogenase.

The steroidogenic enzyme type 1 17beta-hydroxysteroid dehydrogenase (17beta-HSD) is involved in the synthesis of estradiol (E(2)), a hormone well-known to stimulate the growth of estrogen-sensitive tumors. To obtain compounds able to control E(2) formation, two moieties were linked with a methylene side chain: an adenosine moiety for interacting with the cofactor-binding site and an E(2) moiety for interacting with the substrate-binding site. When tested as inhibitors of type 1 17beta-HSD, the hybrid compounds inhibited the reductive activity (E(1) into E(2)) with IC(50) values ranging from 52 to 1,000 nM. The optimal side-chain length was determined to be eight methylene groups for a 16 beta-orientation. The presence of two components (E(2) and adenosine) is essential for good inhibition, since 16 beta-nonyl-E(2) and 5-nonanoyl-O-adenosine, two compounds having only one of the components, did not inhibit the enzyme. Moreover, the 3D-structure analysis of EM-1,745 complexed with type 1 17beta-HSD showed key interactions with both substrate- and cofactor-binding sites.

A concerted, rational design of type 1 17beta-hydroxysteroid dehydrogenase inhibitors: estradiol-adenosine hybrids with high affinity.

Human estrogenic 17beta-hydroxysteroid dehydrogenase (17beta-HSD type 1) catalyzes the final step in the synthesis of active estrogens that stimulate the proliferation of breast cancer cells. Based on the initial premise to make use of the binding energies of both the substrate and cofactor sites, and molecular modeling starting from the enzyme structure, several estradiol-adenosine hybrids were designed and synthesized. Among these hybrids, EM-1745 with a linker of 8-CH2 groups is proved to be the best competitive inhibitor with a Ki of 3.0 +/- 0.8 nM. The crystal structure of the EM-1745 enzyme complex at 1.6 A provides evidence at atomic resolution of strong interactions between both the steroid and cofactor moieties and the enzyme molecule, as illustrated by a deltaA-weighted 2Fo-Fc electron density map contoured at 3.0 delta. The substrate entry loop is further stabilized in this complex compared with previous complexes of the enzyme. These results confirm our initial strategy of combining studies of structural biology and enzyme mechanism in the inhibitor design, which may be applied to other steroidogenic enzymes involved in human diseases.

New method of voxel phantom creation: application for whole-body counting calibration and perspectives in individual internal dose assessment.

The purpose of this work is to present an innovative approach for the creation and application of voxel phantoms associated with the Monte Carlo calculation (MCNP) for the calibration of whole-body counting systems dedicated to the measurement of fission and activation products. The new method is based on a graphical user interface called 'OEDIPE' that allows to simulate a whole measurement process using all measurement parameters, the final goal being to approach a numerical calibration of the facilities. The creation of voxel phantoms and validation of the method are presented in this paper using the IGOR phantom. Finally, the efficiency of the method is discussed, in particular, with the perspective of validating IGOR as a suitable human-equivalent phantom and for the assessment of uncertainties in dose estimation due to the inhomogeneous distribution of activity in the body, correlated to the bio-kinetic behaviour of the radionuclides.

In vitro production of superoxide and nitric oxide (as nitrite and nitrate) by Mytilus galloprovincialis haemocytes upon incubation with PMA or laminarin or during yeast phagocytosis.

The phagocytic process is one of the most important elements of the self-defence system in mammals as well as in molluscs. In mammalian phagocytes, superoxide participates in the innate defence system by combining with nitric oxide to generate peroxynitrite, a strong oxidant that possesses highly cytotoxic properties against bacteria. To evidence a role of nitric oxide in the self-defence system of the marine bivalve Mytilus galloprovincialis similar to the role observed in the mammalian defence system, we measured the generation of superoxide and nitrite/nitrate (the stable end products of nitric oxide) upon in vitro stimulation of M. galloprovincialis haemocytes with PMA, laminarin, LPS and by phagocytosis of Saccharomyces cerevisiae (yeast cells). We show that stimulation with PMA, laminarin and yeast cell phagocytosis promotes superoxide and nitrite/nitrate generation from M. galloprovincialis haemocytes. Inhibitors of NADPH oxidase and inhibitors of NO synthase decreased the nitrite/nitrate levels generated by M. galloprovincialis haemocytes showing that both NADPH oxidase and NO synthase pathways are involved in the self-defence system of M. galloprovincialis.

Original involvement of antimicrobial peptides in mussel innate immunity.

Recently, the existence and extended diversity of antimicrobial peptides has been revealed in two mussel species. These molecules are classified into four groups according to common features of their primary structure: defensins, mytilins, myticins and mytimycin. In Mytilus galloprovincialis, gene structure reveals synthesis as precursors in circulating hemocytes. Synthesised even in absence of challenge, the precursors mature and the peptides are stored in granules as active forms. The different peptides are engaged in the destruction of bacteria inside phagocytes, before being released into hemolymph to participate in systemic responses. Such involvement in anti-infectious responses is unique, and apparently more related to those of mammalian phagocytes than to those of insects.

Oyster IKK-like protein shares structural and functional properties with its mammalian homologues.

In our search for genes involved in oyster immunity we isolated a cDNA encoding a polypeptide closely related to the mammalian IkappaB kinase (IKK) family. IKK proteins play a central role in cell signaling by regulating nuclear factor-kappaB (NF-kappaB) activation. We report here the cloning of an oyster IKK-like protein (oIKK) which possesses the characteristic organization of the mammalian IKK proteins, namely an amino-terminal kinase domain followed by a leucine zipper region and a carboxyl-terminal helix-loop-helix motif. When transfected into human cell lines, oIKK activated the expression of NF-kappaB-controlled reporter gene, whereas transfections with mutants of oIKK deleted within the kinase domain or within the helix-loop-helix motif respectively abolished and greatly reduced reporter gene activation. These results indicate that oIKK can replace the hIKK-alpha in catalyzing NF-kappaB nuclear translocation, and in triggering gene expression. Our results sustain the concept of an evolutionarily conserved signaling machinery in which IKK plays a major role.

Transient expression assays with the proximal promoter of a newly characterized actin gene from the oyster Crassostrea gigas.

We undertook the characterization of an actin gene and its proximal promoter in the oyster Crassostrea gigas. A complete actin cDNA was identified, sequenced and its amino acid sequence deduced. Comparative analysis showed a high homology with actin of other species and that this gene is closer to the cytoplasmic form of actins than to the muscle type. A probe derived from the 5'-untranslated region of the cDNA was then used to isolate the actin gene from a genomic library. The gene was sequenced and shown to contain a single 643 bp intron. A 1670 bp fragment upstream from the open reading frame was isolated and sequenced. This upstream region displays typical features of actins such as a serum response element (CarG box). This fragment was cloned into the promoterless vector pGL3-basic and the resulting construct was transfected into cells of dissociated oyster heart primary cultures. Its capacity to express the luciferase in this in vitro homologous system was monitored and showed high expression levels. This is the first complete actin sequence reported so far for the oyster C. gigas and its promoter is the first available among bivalves.

Second-set allograft responses in the earthworm Lumbricus terrestris. Kinetics and characteristics.

Second-set Lumbricus terrestris allografts from the same donor to the same recipient undergo accelerated rejection if transplanted less than 10 days after first-set allografts. In contrast, second-set allografts, transplanted at longer intervals (20-90 days) show no accelerated rejection. Accelerated rejection of allotransplants under these kinetic conditions agrees with earlier intrafamilial xenotransplant results obtained in earthworms affirming an essential experimental variable: the time of second-set transplantation. Accelerated rejection, weak specificity, and short-term "memory" are three characteristics of the earthworm's allogeneic cellular defense/immune system. These reactions probably result from intense responses (although of short duration) of coelomocytes activated by first transplants that are still present at the time of second-set grafting but absent or inactive at later periods.