Search results for "Biochemistry"
showing 10 items of 20172 documents
The non-appearance of female-specific proteins in male Spilostethus pandurus)
1990
1. 1. Female-specific peptides can be detected by SDS-PAGE in the haemolymph when the female insects are 48 hr old. 2. 2. The age of the male insect at the moment of treatment with juvenile hormone I (JH I), JH III or ecdysone has no influence on the induction of the female-specific bands in male S. pandurus. 3. 3. Male insects exposed to the hormones for periods of time longer than 24 hr were also unable to show female-specific bands in their haemolymph. Consecutive treatments with JH were unable to induce these peptides in the males.
Secretagogues Modulate the Calcium Concentration in the Endoplasmic Reticulum of Insulin-secreting Cells
1999
The precise regulation of the Ca2+ concentration in the endoplasmic reticulum ([Ca2+]er) is important for protein processing and signal transduction. In the pancreatic beta-cell, dysregulation of [Ca2+]er may cause impaired insulin secretion. The Ca2+-sensitive photoprotein aequorin mutated to lower its Ca2+ affinity was stably expressed in the endoplasmic reticulum (ER) of rat insulinoma INS-1 cells. The steady state [Ca2+]er was 267 +/- 9 microM. Both the Ca2+-ATPase inhibitor cyclopiazonic acid and 4-chloro-m-cresol, an activator of ryanodine receptors, caused an almost complete emptying of ER Ca2+. The inositol 1,4,5-trisphosphate generating agonists, carbachol, and ATP, reduced [Ca2+]e…
SFRR-E Young Investigator AwardeeαB-crystallin modulation after acute exercise in skeletal muscle: the role of oxidative stress and fiber composition.
2015
αB-crystallin (CRYAB) is a member of the small heat shock proteins implicated in various biological functions, particularly in skeletal muscle where it is involved in adaptive remodelling processes, activation of gene transcription and stabilization of nascent proteins.In this research we analysed αB-crystallin' response in mouse gastrocnemius at 15' and 30' of recovery from an acute aerobic exercise (1hour), correlating its modulation with oxidative stress level and fiber composition, red (RG) and white gastrocnemius (WG).We found for the first time that the acute exercise lead to a short term, specific increase of phospho-αB-crystallin level (pCRYAB) in the RG, while no changes were obser…
Effect of genetic polymorphisms involved in folate metabolism on the concentration of serum folate and plasma total homocysteine (p-tHcy) in healthy …
2015
Data on the effect of combined genetic polymorphisms, involved in folate metabolism, on the concentration of serum folate after folic acid supplementation are scarce. Therefore, we investigated the impact of seven gene polymorphisms on the concentration of serum folate and p-tHcy in healthy subjects after short-term folic acid supplementation. In a randomized, double blind, crossover study, apparently healthy subjects were given either 0.8 mg folic acid per day (n = 46) or placebo (n = 45) for 14 days. The washout period was 14 days. Fasting blood samples were collected on day 1, 15, 30 and 45. Data on subjects on folic acid supplementation (n = 91) and on placebo (n = 45) were used for the…
Rituximab for Immune Thrombocytopenia: A Retrospective Analysis on the Role of Prophylaxis Against Pneumocystis Jirovecii and Herpes Zoster Virus
2018
Abstract Introduction and objective of the study Rituximab (RTX) is considered a valid second line treatment option for persistent or chronic Immune Thrombocytopenia (ITP). RTX is known to affect the immune system thus increasing the risk for viral and fungal infections. Although prophylactic treatment to prevent Pneumocystis jirovecii (PJ) and herpes viruses' infections is used in patients with haematological neoplasms receiving RTX, these evidence is lacking in ITP patients candidated to anti-CD20 therapy. We here reported the role of phrophylaxis in a cohort of patients treated with RTX for refractory/relapsed ITP. Methods Data from patients affected by ITP and treated at our Institution…
Product of aromatase activity in intact LNCaP and MCF-7 human cancer cells
1997
We investigated conversion rates of androgens to estrogens in cultured, hormone-responsive prostate (LNCaP) and breast (MCF-7) human cancer cells. For this purpose, we adopted an intact cell analysis, whereby cells were incubated for different incubation times in the presence of close-to-physiological (1 nM) or supraphysiological (1 μM) concentrations of labelled androgen precursors, i.e. testosterone (T) and androstenedione (Δ4Ad). The aromatase activity, as measured by estrogen formation, was detected in LNCaP cells (0.5 pmol/ml), even though to a significantly lower extent than in MCF-7 cells (5.4 pmol/ml), using 1 μM T after 72 h incubation. Surprisingly, LNCaP cells displayed a much hi…
Luspatercept Increases Hemoglobin and Reduces Transfusion Burden in Patients with Low-Intermediate Risk Myelodysplastic Syndromes (MDS): Long-Term Re…
2016
Abstract Background: Management of anemia is a common therapeutic challenge in patients with MDS. Luspatercept (ACE-536), a fusion protein containing modified activin receptor type IIB, is being developed for treatment of anemia in lower-risk MDS. Luspatercept binds GDF11 and other TGF-β superfamily ligands to promote late-stage erythroid differentiation and increase hemoglobin (Hgb) levels (Suragani R, Nat Med, 2014 and Attie K, Am J Hematol, 2014). Aims: This is an ongoing, phase 2, multicenter, open-label, long-term extension study to evaluate the effects of luspatercept in patients (pts) with low-intermediate risk MDS. Endpoints include long-term safety and tolerability, erythroid respo…
THU0413 New Formulation with Potential for the Prevention and Treatment of Osteoporosis and Osteoarthritis
2013
Background Osteoarthritis (OA) is a multidimensional disease that affects all anatomical joint structures, particularly cartilage, synovium and subchondral bone. In turn, osteoporosis (OP) is a skeletal disorder characterized by a compromised bone strength which substantially increases the risk of fracture. Both are common disorders which affect quality of life in elderly. Despite this, there is not any drug at the moment for the simultaneous prevention and treatment of osteoporosis and osteoarthritis. Objectives The aim of this study was to investigate the effect of a new formulation in a combined rat model of OP and OA. The formulation (BIS076) contains Vitamin D3, Hydroxyapatite as a sou…
Outcomes of Mismatched Related Allogeneic Stem Cell Transplantation for Chronic Lymphocytic Leukemia: A Retrospective Study on Behalf of the Chronic …
2016
Abstract Introduction: Allogeneic hematopoietic stem cell transplantation (HCT) is a treatment for CLL that can give long disease control. Even with the availability of kinase and BCL2 inhibitors, HCT is still performed in fit patients (pts) with high-risk CLL. Almost exclusively, outcomes on matched related and unrelated donor transplantations in CLL have been published. Recently, mismatched related donors are gaining interest because of the better outcome of haploidentical HCT with post-transplantation cyclophosphamide (PTCY). Methods: All pts with CLL who received a first allogeneic HCT with a mismatched related donor and whose data were available in the EBMT registry were analyzed. Medi…
Inconsistency in circulating irisin levels: what is really happening?
2014
The discovery of irisin as a novel and promising peptidic hormone for the treatment of obesity and diabetes has recently been reported. As a result, great hopes have been raised based on this finding, hypothesizing that irisin might provide additional benefits, not only for obesity and diabetes, but also for a wide range of pathological conditions requiring therapeutical and clinical attention. However, controversial results and conclusions on circulating irisin concentrations and correlations with other variables, including its role in metabolism, have recently been reported. Although laboratory assessment of irisin by ELISA is easily available and may provide interesting information for t…