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https://www.readbyqxmd.com/read/29227750/genetic-polymorphisms-in-prm1-prm2-and-ybx2-genes-are-associated-with-male-factor-infertility
#1
Oya Sena E Aydos, Yalda Hekmatshoar, Buket Altınok, Tülin Özkan, Onur Şakirağaoğlu, Aynur Karadağ, Fuat Kaplan, Seda Ilgaz, Mehmet Taşpınar, Işıl Yükselen, Asuman Sunguroğlu, Kaan Aydos
AIMS: The etiology of infertility is still unknown in almost half of all male infertility patients. In sperm, DNA condensation differs from somatic and female gamete cells, with the protamine (PRM) gene and its transcription factor, Y-box binding protein 2 (YBX2), playing key roles in making the structure more compact. Protamine polymorphisms have been studied in different populations, but various results have been acquired. MATERIALS AND METHODS: In our study, we examined, for the first time in a Turkish population, the association between protamine gene alleles (PRM1 c...
December 11, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/29217244/intraoperative-transesophageal-and-postoperative-transthoracic-echocardiographic-evaluation-of-a-mechanical-heart-valve-prosthesis-implanted-at-aortic-position
#2
Saravana Babu, Rupa Sreedhar, Shrinivas V Gadhinglajkar, Prasanta Kumar Dash, Subin Sukesan, Vivek Pillai, Varghese T Panicker, Lovhale Pravin Shriram, Neelam Aggarwal
OBJECTIVE: The aims of this study were to evaluate the intraoperative transesophageal echocardiographic (iTEE) characteristics and Doppler flow profile of aortic Chitra heart valve prosthesis (CHVP) under stable hemodynamic and loading conditions, and to compare and correlate the iTEE data with the postoperative transthoracic echocardiography (TTE) data obtained at 48 hours (TTE1) and 3 months (TTE2) after the surgery. DESIGN: Prospective, observational study. SETTING: University-level tertiary referral hospital...
September 6, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29216327/protamine-neutralizes-chondroitin-sulfate-proteoglycan-mediated-inhibition-of-oligodendrocyte-differentiation
#3
Kazuya Kuboyama, Naomi Tanga, Ryoko Suzuki, Akihiro Fujikawa, Masaharu Noda
Chondroitin sulfate proteoglycans (CSPGs), which are enriched in demyelinating plaques in neurodegenerative diseases, such as multiple sclerosis (MS), impair remyelination by inhibiting the migration and differentiation of oligodendrocyte precursor cells (OPCs) in the central nervous system (CNS). We herein show that protamine (PRM, also known as a heparin antagonist) effectively neutralizes the inhibitory activities of CSPGs, thereby enhancing OPC differentiation and (re)myelination in mice. Cell-based assays using mouse OPC-like OL1 cells revealed that the PRM treatment exerted masking effects on extracellular CSPGs and improved oligodendrocyte differentiation on inhibitory CSPG-coated substrates...
2017: PloS One
https://www.readbyqxmd.com/read/29205060/correction-to-nematollahi-et%C3%A2-al-ternary-complex-of-plasmid-dna-with-nls-mu-mu-protein-and-cationic-niosome-for-biocompatible-and-efficient-gene-delivery-a-comparative-study-with-protamine-and-lipofectamine
#4
(no author information available yet)
No abstract text is available yet for this article.
December 5, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29199997/thrombolysis-for-acute-ischemic-stroke-after-protamine-reversal-of-heparin
#5
Omar Danoun, Pawani Sachar, Kumar Rajamani
No abstract text is available yet for this article.
July 14, 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/29196042/multilayer-polyion-complex-nanoformulations-of-superoxide-dismutase-1-for-acute-spinal-cord-injury
#6
N V Nukolova, A D Aleksashkin, T O Abakumova, A Y Morozova, I L Gubskiy, Е А Kirzhanova, M A Abakumov, V P Chekhonin, N L Klyachko, A V Kabanov
As one of the most devastating forms of trauma, spinal cord injury (SCI) remains a challenging clinical problem. The secondary processes associated with the primary injury, such as overproduction of reactive oxygen species (ROS) and inflammation, lead to concomitant compression of the injured spinal cord and neuronal death. Delivery of copper-zinc superoxide dismutase (SOD1), an efficient ROS scavenger, to the site of injury can mitigate SCI-induced oxidative stress and tissue damage. Towards this goal catalytically active nanoformulations of SOD1 ("nanozymes") are developed as a modality for treatment of SCI...
November 28, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29190857/preparation-in-vitro-characterization-and-pharmacokinetic-study-of-coenzyme-q10-long-circulating-liposomes
#7
Shuoye Yang
Long-circulating liposomal delivery systems of encapsulated Coenzyme Q10 (CoQ10), a ubiquinone anti-cataract agent, were developed with different molar ratios of PEGylated lipids and/or cholesterol. The resulting samples were contrasted through observation of morphology, analysis of particle size and Zeta potential, and in vivo pharmacokinetics. A protamine aggregation method with high selectivity was developed to determine the encapsulation efficiency (EE), after which the liposome formulation was further optimized by applying a Box Behnken design (BBD) using EE as the evaluation index...
November 30, 2017: Drug Research
https://www.readbyqxmd.com/read/29186293/early-histone-h4-acetylation-during-chromatin-remodeling-in-equine-spermatogenesis
#8
Chelsea C Ketchum, Casey D Larsen, Alexis McNeil, Mirella L Meyer-Ficca, Ralph G Meyer
Chromatin remodeling during spermatogenesis culminates in the exchange of nucleosomes for transition proteins and protamines as an important part of spermatid development to give rise to healthy sperm. Comparative immunofluorescence analyses of equine and murine testis histological sections were used to characterize nucleoprotein exchange in the stallion. Histone H4 hyperacetylation is considered a key event of histone removal during the nucleoprotein transition to a protamine-based sperm chromatin structure...
November 25, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29184407/photodynamic-therapy-by-conjugation-of-cell-penetrating-peptide-with-fluorochrome
#9
Chul-Kyu Park, Yong Ho Kim, Suhyun Hwangbo, Hoonsung Cho
Photodynamic therapy (PDT) is a promising alternative therapy that could be used as an adjunct to chemotherapy and surgery for cancer, and works by destroying tissue with visible light in the presence of a photosensitizer (PS) and oxygen. The PS should restrict tissue destruction only to the tumor and be activated by light of a specific wavelength; both of these properties are required. Arginine-rich peptides, such as cell-penetrating peptides, have membrane-translocating and nuclear-localizing activities, which have led to their application in various drug delivery modalities...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29179259/roles-of-histone-h3-5-in-human-spermatogenesis-and-spermatogenic-disorders
#10
K Shiraishi, A Shindo, A Harada, H Kurumizaka, H Kimura, Y Ohkawa, H Matsuyama
Histone H3.5 (H3.5) is a newly identified histone variant highly expressed in the human testis. We have reported the crystal structure, instability of the H3.5 nucleosome and accumulation around transcription start sites, mainly in primary spermatocytes, but its role in human spermatogenesis remains poorly understood. Testicular biopsy specimens from 30 men (mean age: 35 years) with non-obstructive azoospermia (NOA) who underwent microdissection testicular sperm extraction and 23 men with obstructive azoospermia (OA) were included...
November 27, 2017: Andrology
https://www.readbyqxmd.com/read/29177237/the-etiologies-of-dna-abnormalities-in-male-infertility-an-assessment-and-review
#11
REVIEW
Soheila Pourmasumi, Parvin Sabeti, Tahereh Rahiminia, Esmat Mangoli, Nasim Tabibnejad, Ali Reza Talebi
The sperm DNA damage may occur in testis, genital ducts, and also after ejaculation. Mechanisms altering chromatin remodeling are abortive apoptosis and oxidative stress resulting from reactive oxygen species. Three classifications of intratesticular, post-testicular, and external factors have been correlated with increased levels of human sperm DNA damage which can affect the potential of fertility. Lifestyle, environment, medical, and iatrogenic factors might be considered to cause dysmetabolism to make distracting interactions and endocrine disrupting compounds...
June 2017: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/29172917/prospective-evaluation-of-a-protocol-for-transitioning-porcine-lente-insulin-treated-diabetic-cats-to-human-recombinant-protamine-zinc-insulin
#12
Ruth Gostelow, Katarina Hazuchova, Christopher Scudder, Yaiza Forcada, David Church, Stijn J M Niessen
Objectives The objective was to evaluate a nadir-led protocol for transitioning porcine lente insulin suspension (PLIS)-treated diabetic cats onto human recombinant protamine zinc insulin (PZIR). Methods Recently diagnosed (<5 months) diabetic cats, treated with PLIS q12h for ⩾6 weeks, were recruited. Fructosamine, 24 h blood glucose curve (BGC), quality of life assessment (DIAQoL-pet score) and Diabetic Clinical Score (DCS) were assessed at enrolment (PLIS-treated) and 2, 4 and 12 weeks after transitioning to PZIR (starting dose 0...
March 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/29165574/histone-variants-essential-actors-in-the-male-genome-programing
#13
Naghmeh Hoghoughi, Sophie Barral, Alexandra Vargas, Sophie Rousseaux, Saadi Khochbin
Prior to its transmission to the offspring, the male genome has to be tightly compacted. A genome-scale histone eviction and the subsequent repackaging of DNA by protamines direct this essential genome condensation step. The requirement for male germ cells to undergo such a dramatic and unique genome reorganization explains why these cells express the largest number of histone variants, including many testis-specific ones. Indeed, an open chromatin, nucleosome instability and a facilitated process of histone disassembly are direct consequences of the presence of these histone variants in the chromatin of male germ cells...
November 20, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/29160061/a-dual-macrophage-targeting-nanovector-for-delivery-of-oligodeoxynucleotides-to-overcome-cancer-associated-immunosuppression
#14
Xiao-Yan He, Bo-Ya Liu, Jin-Long Wu, Shu-Lun Ai, Ren-Xi Zhuo, Si-Xue Cheng
To overcome cancer-associated immunosuppression, we prepared a dual-targeting vector to deliver CpG oligodeoxynucleotides (ODN) to macrophages. The dual-targeting system composed of mannosylated carboxymethyl chitosan (MCMC)/hyaluronan (HA) for macrophage targeting and protamine sulfate (PS) for ODN complexation was prepared by self-assembly. The effects of ODN delivery on immune cells was studied in J774A.1 cells. Due to the enhanced delivery efficiency, the dual-targeting delivery system exhibits a higher immune stimulatory activity compared with the mono-targeting delivery system containing either MCMC or HA, resulting in dramatically enhanced secretion of pro-inflammatory cytokines and a successful shift to activated macrophages (M1)...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29154161/effect-of-bovine-sperm-chromatin-integrity-evaluated-using-three-different-methods-on-in%C3%A2-vitro-fertility
#15
L S Castro, A F P Siqueira, T R S Hamilton, C M Mendes, J A Visintin, M E O A Assumpção
In vitro fertility potential of individual bulls is still relatively uncharacterized. Classical sperm analysis does not include the evaluation of all sperm characteristics and thus, some cell compartments could be neglected. In humans, sperm DNA integrity has already proven to have major influence in embryo development and assisted reproduction techniques successfully. In bovine, some studies already correlated chromatin integrity with field fertility. However, none of those have attempted to relate DNA assessment approaches such as chromatin deficiency (CMA3), chromatin stability (SCSA; AO+) and DNA fragmentation (COMET assay) to predict in vitro bull fertility...
November 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/29152782/oestradiol-17%C3%AE-is-a-local-factor-inducing-the-early-stage-of-spermatogenesis-in-mouse-testes
#16
K G Kim, Y S Park
This study was undertaken to elucidate the effect of testicular oestradiol-17β (E2 ) on spermatogenesis. Spermatogonial development and spermatogenic gene expression in testicular germ cells were investigated using an in vitro culture system supplemented with E2 . E2 stimulated spermatocytogenic development of cultured testicular germ cells regardless of the addition of follicle-stimulating hormone and testosterone to the culture medium. E2 also induced the expression of genes encoding synaptonemal complex protein 1 and protamine 1, proteins required for spermatogenesis...
November 20, 2017: Andrologia
https://www.readbyqxmd.com/read/29140788/impact-of-protamine-i-on-colon-cancer-proliferation-invasion-migration-diagnosis-and-prognosis
#17
Zhi Chen, Chunyu Shi, Shuohui Gao, Ye Feng
The paper investigated the Protamine I (PRM1) expression and its effects on proliferation, invasion and migration of colon cancer cells as well as its function in clinical diagnosis and prognosis. Gene chips were used to screen differentially expressed genes. PRM1 expression was detected by Western blotting and qRT-PCR. HE staining and immunohistochemistry were utilized to compare the expression of PRM1 from multiple differentiation levels of colon cancer tissues. Cell viability, cell apoptosis and cell cycle were tested by MTT assay and flow cytometry...
August 28, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/29126688/prediction-of-postoperative-blood-loss-using-thromboelastometry-in-adult-cardiac-surgery-cohort-study-and-systematic-review
#18
Michael I Meesters, David Burtman, Peter M van de Ven, Christa Boer
OBJECTIVE: The aim was to evaluate the predictive value of thromboelastometry for postoperative blood loss in adult cardiac surgery with cardiopulmonary bypass. DESIGN: Retrospective cohort study and systematic review of the literature. SETTING: A tertiary university hospital. PARTICIPANTS: 202 patients undergoing elective cardiac surgery. INTERVENTIONS: Thromboelastometry was performed before cardiopulmonary bypass and 3 minutes after protamine administration...
August 16, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29123209/chromatin-protamination-and-catsper-expression-in-spermatozoa-predict-clinical-outcomes-after-assisted-reproduction-programs
#19
S Marchiani, L Tamburrino, F Benini, L Fanfani, R Dolce, G Rastrelli, M Maggi, S Pellegrini, E Baldi
Identification of parameters predicting assisted reproductive technologies (ARTs) success is a major goal of research in reproduction. Quality of gametes is essential to achieve good quality embryos and increase the success of ARTs. We evaluated two sperm parameters, chromatin maturity and expression of the sperm specific calcium channel CATSPER, in relation to ART outcomes in 206 couples undergoing ARTs. Chromatin maturity was evaluated by Chromomycin A3 (CMA3) for protamination and Aniline Blue (AB) for histone persistence and CATSPER expression by a flow cytometric method...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29121251/protective-effect-of-fgf-2-and-low-molecular-weight-heparin-protamine-nanoparticles-on-radiation-induced-healing-impaired-wound-repair-in-rats
#20
Jun Kinoda, Masayuki Ishihara, Shingo Nakamura, Masanori Fujita, Koichi Fukuda, Yoko Sato, Hidetaka Yokoe
We examined the effectiveness of localized administration of fibroblast growth factor-2 containing low-molecular-weight heparin/protamine nanoparticles (FGF-2&LMWH/P NPs) on apoptosis in vivo and on healing of radiation-induced skin injury in a rat model. FGF-2 binds onto LMWH/P NPs, which can significantly enhance and stabilize FGF-2 as a local carrier. X-irradiation at a dose of 25 Gy was administered to the lower part of the back (using a lead sheet with two holes) 1 h before the administration of FGF-2&LMWH/P NPs...
November 7, 2017: Journal of Radiation Research
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