Результаты поиска

Inactivation of a testis-specific Lis1 transcript in mice prevents spermatid differentiation and causes male infertility.

Lis1 protein is the non-catalytic component of platelet-activating factor acetylhydrolase 1b (PAF-AH 1B) and associated with microtubular structures. Hemizygous mutations of the LIS1 gene cause type I lissencephaly, a brain abnormality with developmental defects of neuronal migration. Lis1 is also expressed in testis, but its function there has not been determined. We have generated a mouse mutant (LIS1GT/GT) by gene trap integration leading to selective disruption of a Lis1 splicing variant in testis. Homozygous mutant males are infertile with no other apparent phenotype. We demonstrate that

Efficacy of In Vitro Addition of Low-Dose Arachidonic Acid in Improving the Sperm Motility of Obese Infertile Men With Asthenozoospermia.

This study aimed to investigate the impact of in vitro low-dose arachidonic acid (AA) addition on enhancing sperm motility in obese infertil … the seminal plasma AA metabolic network, indicators showed a positive association with the induced acrosome reaction, seminal plasma Ca2+ levels, PR, and the proportion of grade A sperm (rapid forward motion, speed ≥ 25 μm/s). Additionally, secretory phospholipase A2 (sPLA2), AA, and cyclooxygenase-1 (COX1) levels demonstrated a negative correlation with anthropom …

Fertilization defects in sperm from Cysteine-rich secretory protein 2 (Crisp2) knockout mice: implications for fertility disorders.

STUDY HYPOTHESIS: We hypothesize that fertility disorders in patients with aberrant expression of Cysteine-RIch Secretory Protein 2 (CRISP2) … ctional parameters associated with capacitation such as tyrosine phosphorylation (by western blot), acrosome reaction (by Coomassie Blue staining), hyperactivation (by computer-assisted sperm analysis) and intracellular Ca(2+) levels (by flow cytometry). MAIN RESULTS AND THE ROLE OF CHANCE: Crisp2(-/-) males presented normal fertility and in vivo fertilization rat …

Redox activity associated with the maturation and capacitation of mammalian spermatozoa.

As rat spermatozoa undergo epididymal maturation, they acquire the ability to exhibit a spontaneous burst of luminol-peroxidase-dependent chemiluminescence when released into a simple, defined culture medium. This activity was suppressed by inhibitors of plasma membrane redox systems such as diphenylene iodonium, p-chloromercuribenzenesulfonic acid, and capsaicin, but was resistant to inhibition by resiniferatoxin and rotenone. The luminol-peroxidase signal was dependent on the presence of bicarbonate, enhanced by the substitution of fructose for glucose, and severely suppressed by desferoxami

Воздействие расширительного энергетического субстрата на козлятину, хранящуюся в 17 °С.

Искусственное оплодотворение у коз, как правило, зависит от охлажденных доз спермы, однако оптимальный энергетический субстрат для поддержания метаболизма спермы остается неясным. Цель этого исследования состояла в том, чтобы оценить воздействие различных энергетических субстратов на метаболизм спермы козла и спермы козлятины и их моторность при охлаждении 17 °С. Семя от six Козлы мужского пола Мурциано-Гранадина были собраны и разбавлены в ПБД, дополненных 35 mM глюкозы, фруктозы, пируваты или лактата в ходе первого эксперимента. В ходе второго эксперимента оценивалось воздействие различных к

Совпадение в полном тексте источника
… Indeed, research has shown that each individual process and event (motility, capacitation, or acrosome reaction) or storage temperature (body temperature vs. 4 °C) requires a different substrate and metabolic pathway [ 7 , 9 ]. … Effect of fructose on motility, acrosome reaction and in vitro fertilization capability of boar spermatozoa Reprod. Med. Biol. 2006 5 255 10.1111/j.1447-0578.2006.00150.x 29662401 PMC5891792 32. Sun W. Jiang S. Su J. Zhang J. Bao X. Ding R. Shi P. Li S. Wu C. Zhao G. …

Recent Trends in anti-tumor mechanisms and molecular targets of celastrol.

Celastrol, a compound derived from traditional Chinese medicine, has therapeutic effects and has been used to treat inflammation-related diseases, cancer, cardiovascular diseases, and neurodegenerative diseases. However, current reviews lack a comprehensive and systematic summary of the anti-tumor mechanisms and molecular targets of celastrol. For this reason, this paper reviews the anticancer properties of celastrol and the molecular mechanisms underlying its anticancer effects. This paper primarily focuses on the mechanism of action of celastrol in terms of inhibition of cell proliferation a

Совпадение в полном тексте источника
… The above studies indicate that celastrol has obvious cardiotoxicity, suggesting that the cardiovascular effects of celastrol should be carefully evaluated during clinical use. 5.3 Infertility toxicity Bai and colleagues investigated the impact of celastrol on Ca 2+ channels and the acrosome reaction … Their findings demonstrated that celastrol significantly reduced intracellular Ca 2+ currents in a time-dependent and irreversible manner, additionally inhibiting the progesterone-induced acrosome reaction in sperm. …

Hyaluronan, fluid pressure, and stromal resistance in pancreas cancer.

Pancreatic ductal adenocarcinomas (PDAs) are notoriously aggressive and resistant to treatment. They distinguish themselves further by their robust fibroinflammatory, or desmoplastic, stromal reaction and degree of hypovascularity. Recent findings have revealed multiple mechanisms of stromal complicity in disease pathogenesis and resistance. In this review, we focus on altered physicomechanics as one mechanism of what we term as 'stromal resistance' in PDA. Extremely high interstitial fluid pressures and a dense extracellular matrix combine to limit the delivery and distribution of therapeutic

The Role of Progranulin (PGRN) in the Pathogenesis of Glioblastoma Multiforme.

Glioblastoma multiforme (GBM) represents the most common and aggressive malignant form of brain tumour in adults and is characterized by an extremely poor prognosis with dismal survival rates. Currently, expanding concepts concerning the pathophysiology of GBM are inextricably linked with neuroinflammatory phenomena. On account of this fact, the identification of novel pathomechanisms targeting neuroinflammation seems to be crucial in terms of yielding successful individual therapeutic strategies. In recent years, the pleiotropic growth factor progranulin (PGRN) has attracted significant atten

Assessment of pigmented skin lesions in terms of blood perfusion estimates.

The rising prevalence of vision-threatening eye diseases poses a major global health and economic burden, yet timely diagnosis remains limited by workforce shortages, diagnostic delays, and restricted access to specialized care. Artificial intelligence (AI) offers potential solutions. In particular, recent progress in foundation models and large language models-especially multimodal large language models (MLLMs)-has shown promise in medical image interpretation and automated clinical documentation. However, advancing MLLMs for ophthalmology is hindered by the lack of unified, comprehensive ben

Совпадение в полном тексте источника
… In patients with asthenoteratozoospermia, increased expression of hsa-miR-27a mediates the repression of the Cysteine-RIch Secretory Protein2 ( CRISP2 ) gene that plays a role in sperm motility, acrosome reaction and gamete fusion. …

Cannabidiol on the Path from the Lab to the Cancer Patient: Opportunities and Challenges.

Cannabidiol (CBD), a major non-psychotropic component of cannabis, is receiving growing attention as a potential anticancer agent. CBD suppresses the development of cancer in both in vitro (cancer cell culture) and in vivo (xenografts in immunodeficient mice) models. For critical evaluation of the advances of CBD on its path from laboratory research to practical application, in this review, we wish to call the attention of scientists and clinicians to the following issues: (a) the biological effects of CBD in cancer and healthy cells; (b) the anticancer effects of CBD in animal models and clin

Cannabis, One Health, and Veterinary Medicine: Cannabinoids' Role in Public Health, Food Safety, and Translational Medicine.

Public health is connected to cannabis with regard to food, animal feed (feed), and pharmaceuticals. Therefore, the use of phytocannabinoids should be examined from a One Health perspective. Current knowledge on medical cannabis treatment (MCT) does not address sufficiently diseases which are of epidemiological and of zoonotic concern. The use of cannabinoids in veterinary medicine is illegal in most countries, mostly due to lack of evidence-based medicine. To answer the growing need of scientific evidence-based applicable medicine in both human and veterinary medicine, a new approach for the

Совпадение в полном тексте источника
… Anandamide (arachidonylethanolamide), a brain cannabinoid receptor agonist, reduces sperm fertilizing capacity in sea urchins by inhibiting the acrosome reaction. Proc Natl Acad Sci U S A. 1994;91:7678–82. doi: 10.1073/pnas.91.16.7678. 167. Cottone E, Pomatto V, Cerri F, et al. …

Phosphodiesterase type 5 and cancers: progress and challenges.

Cancers are an extraordinarily heterogeneous collection of diseases with distinct genetic profiles and biological features that directly influence response patterns to various treatment strategies as well as clinical outcomes. Nevertheless, our growing understanding of cancer cell biology and tumor progression is gradually leading towards rational, tailored medical treatments designed to destroy cancer cells by exploiting the unique cellular pathways that distinguish them from normal healthy counterparts. Recently, inhibition of the activity of phosphodiesterase type 5 (PDE5) is emerging as a

Совпадение в полном тексте источника
… Sildenafil citrate improves sperm motility but causes a premature acrosome reaction in vitro. Fertil Steril. 2007;87:1064–1070. doi: 10.1016/j.fertnstert.2006.11.017. 143. Francis SH. Phosphodiesterase 11 (PDE11): Is it a player in human testicular function? …

Purinergic Signalling: Therapeutic Developments.

Purinergic signalling, i.e., the role of nucleotides as extracellular signalling molecules, was proposed in 1972. However, this concept was not well accepted until the early 1990's when receptor subtypes for purines and pyrimidines were cloned and characterised, which includes four subtypes of the P1 (adenosine) receptor, seven subtypes of P2X ion channel receptors and 8 subtypes of the P2Y G protein-coupled receptor. Early studies were largely concerned with the physiology, pharmacology and biochemistry of purinergic signalling. More recently, the focus has been on the pathophysiology and the

Invited Lectures : Overviews Purinergic signalling: past, present and future.

Аннотация не предоставлена источником. Откройте карточку для перехода к публикации.

Р

Аннотация не предоставлена источником. Откройте карточку для перехода к публикации.

C

Аннотация не предоставлена источником. Откройте карточку для перехода к публикации.

Gene regulation by non-Coding RNAs in infertility: a mechanistic review.

Infertility is a significant global health issue affecting millions of couples, with noncoding RNAs (ncRNAs) emerging as pivotal regulators in reproductive biology. This review explores the roles of various ncRNAs, including microRNAs (miRNAs), small interfering RNAs (siRNAs), long noncoding RNAs (lncRNAs), PIWI-interacting RNAs (piRNAs), and circular RNAs (circRNAs) in male and female infertility. These ncRNAs modulate critical processes such as spermatogenesis, oogenesis, follicular development, and embryo implantation through mechanisms like post-transcriptional regulation, chromatin remode

ISEV2020 Резюме

Аннотация не предоставлена источником. Откройте карточку для перехода к публикации.

The proteasome as a druggable target with multiple therapeutic potentialities: Cutting and non-cutting edges.

Ubiquitin Proteasome System (UPS) is an adaptable and finely tuned system that sustains proteostasis network under a large variety of physiopathological conditions. Its dysregulation is often associated with the onset and progression of human diseases; hence, UPS modulation has emerged as a promising new avenue for the development of treatments of several relevant pathologies, such as cancer and neurodegeneration. The clinical interest in proteasome inhibition has considerably increased after the FDA approval in 2003 of bortezomib for relapsed/refractory multiple myeloma, which is now used in

The sirtuin family in health and disease.

Sirtuins (SIRTs) are nicotine adenine dinucleotide(+)-dependent histone deacetylases regulating critical signaling pathways in prokaryotes and eukaryotes, and are involved in numerous biological processes. Currently, seven mammalian homologs of yeast Sir2 named SIRT1 to SIRT7 have been identified. Increasing evidence has suggested the vital roles of seven members of the SIRT family in health and disease conditions. Notably, this protein family plays a variety of important roles in cellular biology such as inflammation, metabolism, oxidative stress, and apoptosis, etc., thus, it is considered a