Abstract:
:We have considered the Huxley-Simmons manoeuvre. On the assumption that the quick release is an elastic process and on the basis of the isometric tension and of the stiffness of the muscle fibre we calculated that the spontaneous release of the fibre requires approximately 43 micros, which is much faster than the observed release, approximately 180 micros. We concluded that the observed quick release is a guided process. After proper selection of the mass and of the stiffness of the system we mimicked the early recovery and noticed that most of the energy required to accomplish the early recovery is supplied by the kinetic energy accumulated during the course of the quick release. We computed that the frequency of the working strokes in the half sarcomere was between 4x10(6) and 40x10(6) s(-1). This is not to say that the ATPase rate constants are accumulative but only that the overall frequency of the working strokes in the half saromere is many orders of magnitude faster than the average ATPase rate constant. With this frequency no part of the Huxley-Simmons manoeuvre, quick release included, escapes the control of the working stroke. This means also that there is no reason to take the early recovery as an indication of the length of the working stroke.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Grazi E,Pozzati Sdoi
10.3390/ijms10030942subject
Has Abstractpub_date
2009-03-01 00:00:00pages
942-53issue
3issn
1422-0067journal_volume
10pub_type
杂志文章abstract::Abstract: Heart failure (HF) is associated with skeletal muscle wasting and exercise intolerance. This study aimed to evaluate the exercise-induced clinical response and histological alterations. One hundred and forty-four HF patients were enrolled. The individual training program was determined as a workload at or cl...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms20215514
更新日期:2019-11-05 00:00:00
abstract::The involvement of microRNAs in the control of repressors of human γ-globin gene transcription has been firmly demonstrated, as described for the miR-486-3p mediated down-regulation of BCL11A. On the other hand, we have reported that miR-210 is involved in erythroid differentiation and, possibly, in γ-globin gene up-r...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms18122530
更新日期:2017-11-26 00:00:00
abstract::The shortage of donor organs is a major global concern. Organ failure requires the transplantation of functional organs. Donor's organs are preserved for variable periods of warm and cold ischemia time, which requires placing them into a preservation device. Ischemia and reperfusion damage the organs, due to the lack ...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms20215511
更新日期:2019-11-05 00:00:00
abstract::Acute kidney injury (AKI) is a fatal medical episode caused by sudden kidney damage or failure, leading to the death of patients within a few hours or days. Previous studies demonstrated that exosomes derived from various mesenchymal stem/stromal cells (MSC-exosomes) have positive effects on renal injuries in multiple...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms21134774
更新日期:2020-07-05 00:00:00
abstract::InPBi exhibits broad and strong photoluminescence at room temperature, and is a potential candidate for fabricating super-luminescence diodes applied in optical coherence tomography. In this paper, the strained InPBi quantum dot (QD) embedded in the AlGaAs barrier on a GaAs platform is proposed to enhance the light em...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms20236001
更新日期:2019-11-28 00:00:00
abstract::In higher organisms, epithelia separate compartments in order to guarantee their proper function. Such structures are able to seal but also to allow substances to pass. Within the paracellular pathway, a supramolecular structure, the tight junction transport is largely controlled by the temporospatial regulation of it...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms20215504
更新日期:2019-11-05 00:00:00
abstract::Down syndrome (DS) or trisomy of chromosome 21 (Hsa21) is characterized by impaired hippocampal-dependent learning and memory. These alterations are due to defective neurogenesis and to neuromorphological and functional anomalies of numerous neuronal populations, including hippocampal granular cells (GCs). It has been...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms22031259
更新日期:2021-01-27 00:00:00
abstract::Radiation therapy is one of the most important treatment modalities for thoracic tumors. Despite significant advances in radiation techniques, radiation-induced lung injury (RILI) still occurs in up to 30% of patients undergoing thoracic radiotherapy, and therefore remains the main dose-limiting obstacle. RILI is a po...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms20163876
更新日期:2019-08-08 00:00:00
abstract::ATP is a major energy source in the mammalian cells, but it is an extracellular chemical messenger acting on P2 purinergic receptors. A line of evidence has shown that ATP is released from many different types of cells including neurons, endothelial cells, and muscle cells. In this review, we described the distributio...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms22010251
更新日期:2020-12-29 00:00:00
abstract::Innate lymphoid cells (ILC) are important players of early immune defenses in situations like lymphoid organogenesis or in case of immune response to inflammation, infection and cancer. Th1 and Th2 antagonism is crucial for the regulation of immune responses, however mechanisms are still unclear for ILC functions. ILC...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms20215493
更新日期:2019-11-04 00:00:00
abstract::Synthesis of the CCA end of essential tRNAs is performed either by CCA-adding enzymes or as a collaboration between enzymes restricted to CC- and A-incorporation. While the occurrence of such tRNA nucleotidyltransferases with partial activities seemed to be restricted to Bacteria, the first example of such split CCA-a...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms21020462
更新日期:2020-01-10 00:00:00
abstract::The non-proteinogenic amino acid lanthionine is a byproduct of hydrogen sulfide biosynthesis: the third endogenous vasodilator gas, after nitric oxide and carbon monoxide. While hydrogen sulfide is decreased in uremic patients on hemodialysis, lanthionine is increased and has been proposed as a new uremic toxin, since...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms19051323
更新日期:2018-04-29 00:00:00
abstract::The phytohormone auxin regulates various developmental programs in plants, including cell growth, cell division and cell differentiation. The auxin efflux carriers are essential for the auxin transport. To show an involvement of auxin transporters in the coordination of fruit development in bitter gourd, a juicy fruit...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms18112343
更新日期:2017-11-06 00:00:00
abstract::The Prostate Health Index (PHI) has been used increasingly in the context of prostate cancer (PCa) diagnostics since 2010. Previous studies have shown an association between PHI and a tumor volume of >0.5 cm³. The aim of this study was to investigate the correlation between PHI and tumor volume as well as the Gleason ...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms18030488
更新日期:2017-02-24 00:00:00
abstract::Spiciformin (1) is a sesquiterpene lactone with a germacrane skeleton that is found in two Tanacetum species endemic to the Canary Islands. In this study, the cytotoxicities of 1 and its acetyl derivative (2) were evaluated against human tumor cells. These sesquiterpene lactones were cytotoxic against human acute myel...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms21082782
更新日期:2020-04-16 00:00:00
abstract::The tumor-suppressor protein p16 is paradoxically overexpressed in cervical cancer (CC). Despite its potential as a biomarker, its clinical value and the reasons for its failure in tumor suppression remain unclear. Our purpose was to determine p16 clinical and biological significance in CC. p16 expression pattern was ...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms21062125
更新日期:2020-03-19 00:00:00
abstract::This study aims to reveal the potential relationship between 5-HT and oxidative stress in the organism. Our in vitro experiments in RIN-14B cells showed that anoxia leads the cells to the state of oxidative stress. Administration of exogenous 5-HT exacerbated this effect, whereas the inhibition of Tph1, LP533401 allev...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms20061364
更新日期:2019-03-18 00:00:00
abstract::Somatic embryos (SE) have potential to rapidly form a whole plant. Generally, SE is thought to be derived from embryogenic calli (EC). However, in maize, not only embryogenic calli (EC, can generate SE) but also nonembryogenic calli (NEC, can't generate SE) can be induced from immature embryos. In order to understand ...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms19124004
更新日期:2018-12-12 00:00:00
abstract::Protein inhibitors of proteases are an important tool of nature to regulate and control proteolysis in living organisms under physiological and pathological conditions. In this review, we analyzed the mechanisms of inhibition of cysteine proteases on the basis of structural information and compiled kinetic data. The g...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms22030997
更新日期:2021-01-20 00:00:00
abstract::Kynurenine aminotransferase isozymes (KATs 1-4) are members of the pyridoxal-5'-phosphate (PLP)-dependent enzyme family, which catalyse the permanent conversion of l-kynurenine (l-KYN) to kynurenic acid (KYNA), a known neuroactive agent. As KATs are found in the mammalian brain and have key roles in the kynurenine pat...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms17060946
更新日期:2016-06-15 00:00:00
abstract::Pancreatic cancer (PC) is a highly lethal malignancy due to the cancer routinely being diagnosed late and having a limited response to chemotherapy. Pancreatic ductal adenocarcinoma (PDAC) is the most common form of pancreatic malignant tumor, representing more than 85% of all pancreatic cancers. In the present study,...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms21124473
更新日期:2020-06-23 00:00:00
abstract::Idiopathic pulmonary fibrosis (IPF) is age-related interstitial lung disease of unknown etiology. About 100,000 people in the U.S have IPF, with a 3-year median life expectancy post-diagnosis. The development of an effective treatment for pulmonary fibrosis will require an improved understanding of its molecular patho...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms21020643
更新日期:2020-01-18 00:00:00
abstract::Understanding how cell organelles and compartments communicate with each other has always been an important field of knowledge widely explored by many researchers. However, despite years of investigations, one point-and perhaps the only point that many agree on-is that our knowledge about cellular-signaling pathways s...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms21176173
更新日期:2020-08-26 00:00:00
abstract::Programmed cell death (PCD) is a crucial process required for the normal development and physiology of metazoans. The three major mechanisms that induce PCD are called type I (apoptosis), type II (autophagic cell death), and type III (necrotic cell death). Dysfunctional PCD leads to diseases such as cancer and neurode...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms15023145
更新日期:2014-02-21 00:00:00
abstract::Endocannabinoids including anandamide and 2-arachidonoylglycerol are involved in cancer pathophysiology in several ways, including tumor growth and progression, peritumoral inflammation, nausea and cancer pain. Recently we showed that the endocannabinoid profiles are deranged during cancer to an extent that this manif...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms17020230
更新日期:2016-02-10 00:00:00
abstract::Salinity is considered as one of the most important abiotic challenges that affect crop productivity. Plant hormones, including salicylic acid (SA), are key factors in the defence signalling output triggered during plant responses against environmental stresses. We have previously reported in peach a new SA biosynthet...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms19113519
更新日期:2018-11-08 00:00:00
abstract::MicroRNAs (miRNAs) play key roles in plant reproduction. However, knowledge on microRNAome analysis in autotetraploid rice is rather limited. Here, high-throughput sequencing technology was employed to analyze miRNAomes during pollen development in diploid and polyploid rice. A total of 172 differentially expressed mi...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms17040499
更新日期:2016-04-12 00:00:00
abstract::Gastric cancer (GC) is the fifth most common cancer worldwide and the second leading cause of cancer-related death. GC is usually diagnosed at an advanced stage due to late presentation of symptoms. Therefore, there is a need for establishing more sensitive and specific markers useful in early detection of the disease...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms21228456
更新日期:2020-11-10 00:00:00
abstract::Creatine is a metabolite important for cellular energy homeostasis as it provides spatio-temporal adenosine triphosphate (ATP) buffering for cells with fluctuating energy demands. Here, we examined whether placental creatine metabolism was altered in cases of early-onset pre-eclampsia (PE), a condition known to cause ...
journal_title:International journal of molecular sciences
pub_type: 杂志文章
doi:10.3390/ijms21030806
更新日期:2020-01-26 00:00:00
abstract::Prostate cancer is the most prevalent disease affecting males in many Western countries, with an estimated 29,480 deaths in 2014 in the US alone. Incidence rates for prostate cancer deaths have been decreasing since the early 1990s in men of all races/ethnicities, though they remain about 60% higher in African America...
journal_title:International journal of molecular sciences
pub_type: 杂志文章,评审
doi:10.3390/ijms16023350
更新日期:2015-02-03 00:00:00