Abstract：
:We have studied the relationship between the in vivo aging process of the human red cell (RBC) and its main function, the transport of O2 from the lungs to the tissues. This study included several approaches. First, we observed that the affinity for O2 in young RBCs was lower than in old RBCs (p less than 0.0005) due to different intracellular concentration of 2,3-diphosphoglycerate, main effector of hemoglobin. Second, we explored whether there are some subgroups of the healthy human population with altered RBC age distribution: females in the age range 25-35 exhibited significantly younger RBCs (p less than 0.0005) and lower RBC-O2 affinity (p less than 0.01) than other groups. Correspondingly, the RBC-O2 affinity in female blood was significantly lower (p less than 0.002) than in male blood. Third, we correlated by two independent methods the lowered RBC-O2 affinity to a more efficient O2 delivery to the tissues by two independent methods: 1) calculating the size of the cardiac output increase required to sustain the tissue oxygenation after an increase of the RBC affinity for O2; and 2) monitoring the enhanced cardiac function in isolated rat hearts perfused with RBCs at low O2 affinity. Finally, comparing some hematologic findings relevant for the O2 transport in two healthy populations with different RBC age distributions, such as age-matched females and males, it appeared that the low RBC-O2 affinity in females is an adaptive response to their lower [Hb].(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Samaja M,Rovida E,Motterlini R,Tarantola Mdoi
10.1007/978-1-4684-5985-2_11subject
Has Abstractpub_date
1991-01-01 00:00:00pages
115-23eissn
0065-2598issn
2214-8019journal_volume
307pub_type
杂志文章,评审abstract：:In the microenvironment of solid growing tumors, pronounced hypoxia or extracellular acidosis is commonly found. The aim of this study was the analysis of the cytotoxic effect of different chemotherapeutic agents (cisplatin, daunorubicin, docetaxel) under these conditions in vitro. Prostate carcinoma cells (R3327-AT1)...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-71764-7_21
更新日期：2007-01-01 00:00:00
abstract：:The manzamine alkaloids such as manzamine A, B, and C belongs to a unique family of cyctotoxic beta-carbline linked azacycles, which have been isolated from several marine sponges. Manzamine A has recently been shown to exhibit in vivo antimalarial activity against parasite Plasmodium berghei. Further progress was add...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-0135-0_70
更新日期：2003-01-01 00:00:00
abstract：:Young chicks were experimentally infected with 6 strains of AEEC isolated from calves, pigs, chicks, and humans. AEEC colonized the cecum of chicks and induced the AE lesions on the mucosal surface. In the early stages of the AE lesions, AEEC attached to the enterocyte were enfolded with the microvilli. In the advance...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4899-1828-4_16
更新日期：1997-01-01 00:00:00
abstract：:Fumonisins are responsible for many of the toxic effects of the common corn fungus, Fusarium moniliforme. They are acute renal and liver toxins in rats, and have tumor promoting activity. Fumonisin B1 is poorly absorbed, rapidly excreted, and persists in small amounts in the liver and kidney. Fumonisins are specific i...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4899-1379-1_20
更新日期：1996-01-01 00:00:00
abstract：:We conducted an epidemiological survey of antibiotic resistance in Salmonella recovered from market-age swine at five different Texas farms. These farms, which were visited between October 1997 and June 1998, were completely integrated, farrow-to-finish operations. Samples were taken from the lymph nodes and cecal con...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-4143-1_31
更新日期：1999-01-01 00:00:00
abstract：:Deacetylation of histones is required for gene regulation and cell cycle progression and the mediators, the histone deacetylases, are being vigorously pursued as drug targets for cancer chemotherapy. The deacetylases are also potential drug targets against infectious diseases and genome sequencing revealed proteins of...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-77570-8_7
更新日期：2008-01-01 00:00:00
abstract：:In this paper we report the effect of sulfatides on rate constants of Factor XII activation by kallikrein and its isolated light chain. In free solution kallikrein and the light chain were equally effective in activating Factor XII and both enzymes had their pH optimum at pH 7.0 (k1 = 1.6 X 10(3) M-1 s-1). Sulfatides ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4757-0154-8_3
更新日期：1986-01-01 00:00:00
abstract：:An unknown, but significant subgroup (perhaps the majority), of patients who have undergone chemotherapy treatment for their cancer report a subsequent decline in cognitive performance (e.g., difficulty in balancing a checkbook; forgetting or mixing up names of friends or relatives, etc.). The condition has been terme...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：2010-01-01 00:00:00
abstract：:Herpes simplex virus and varicella-zoster virus have been treated for more that half a century using nucleoside analogues. However, there is still an unmet clinical need for improved herpes antivirals. The successful compounds, acyclovir; penciclovir and their orally bioavailable prodrugs valaciclovir and famciclovir,...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4614-5037-5_7
更新日期：2013-01-01 00:00:00
abstract：:Bartonella species, vector-borne etiologic agents of many systemic or self-limited infections, are responsible for a widening spectrum of diseases in humans, including inflammatory conditions of the eye. The aim of this study was to determine whether there is any relationship between uveitis and the evidence of Barton...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/5584_2017_19
更新日期：2017-01-01 00:00:00
abstract：:Bovine coronavirus (BCV), human coronavirus OC43 (HCV-OC43) and hemagglutinating encephalomyelitis virus (HEV) are serologically related viruses that all have hemagglutinating activity. The receptor determinant for attachment to erythrocytes has been shown to be N-acetyl-9-O-acetylneuraminic acid (Neu5,9Ac2). We compa...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-1899-0_60
更新日期：1995-01-01 00:00:00
abstract：:The effect of hypoxia on the in vivo radiation response of tumors is demonstrated both for the measurement of cell survival and growth delay following treatment. Results using these endpoints for the KHT Sarcoma are then presented to demonstrate the effect of various parameters which are expected to control tumor oxyg...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-7790-0_3
更新日期：1983-01-01 00:00:00
abstract：:Store-operated Ca2+ entry (SOCE) is a ubiquitous mechanism for Ca2+ influx in mammalian cells with important physiological implications. Since the discovery of SOCE more than three decades ago, the mechanism that communicates the information about the amount of Ca2+ accumulated in the intracellular Ca2+ stores to the ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-12457-1_17
更新日期：2020-01-01 00:00:00
abstract：:Post-natal skeletal muscle is a highly plastic tissue that has the capacity to regenerate rapidly following injury, and to undergo significant modification in tissue mass (i.e. atrophy/hypertrophy) in response to global metabolic changes. These processes are reliant largely on soluble factors that directly modulate mu...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-27511-6_7
更新日期：2016-01-01 00:00:00
abstract：:The allosteric property of globular proteins is applauded as their intrinsic ability to regulate distant sites, and this property further plays a critical role in a wide variety of cellular regulatory mechanisms. Recent advancements and studies have revealed the manifestation of allostery in intrinsically disordered p...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-13-8719-7_14
更新日期：2019-01-01 00:00:00
abstract：:Differences between serum and plasma complement, which now is called as the cold activation of complement, was investigated in relation with the phenomenon reported as the cold promoted activation of factor VII, to which kallikrein and Hageman factor are known to participate. Despite the presence of several similariti...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：1979-01-01 00:00:00
abstract：:Type 1 diabetes mellitus (T1DM) is classified as an autoimmune disease which progressively results in the depletion of insulin-secreting β-cells. Consequently, the insulin secretion stops leading to hyperglycemic situations within the body. Under severe conditions, it also causes multi-organ diabetes-associated dysfun...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/5584_2018_195
更新日期：2019-01-01 00:00:00
abstract：:Heparanase is the principal enzyme that degrades heparan sulfate (HS) in both physiological (HS turnover) and pathological (tumor metastasis, inflammation) cell conditions, catalysing the hydrolysis of the β-1-4 glycosidic bond in -GlcUA-β(1-4)-GlcNX-. Despite efforts to define the minimum trisaccharide sequence that ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-34521-1_6
更新日期：2020-01-01 00:00:00
abstract：:Coronavirus defective RNA (D-RNA) vectors could be developed to deliver selected genes for the production of recombinant coronavirus vaccines. An IBV D-RNA, CD-61, derived from a naturally occurring IBV Beaudette D-RNA, CD-91, is being developed as a D-RNA vector for IBV. In order to use CD-61 as a vector it will requ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-5331-1_33
更新日期：1998-01-01 00:00:00
abstract：:Legume proteins are relatively deficient in the sulfur amino acids. Among the different strategies to increase the sulfur amino acid contents of legumes, we have chosen to increase the biosynthesis of endogenous, non-abundant sulfur-rich proteins we have identified in soybean seed. We identified and isolated an 8 kDa ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-4729-7_10
更新日期：1999-01-01 00:00:00
abstract：:The recruitment of monocytes from the peripheral vasculature to an area of chronic inflammation is a complex phenomenon. This complicated process is likely mediated to a large extent by chemotactic cytokines that are expressed via a cytokine cascade. A number of chronic diseases that are difficult to manage are charac...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4684-6009-4_8
更新日期：1991-01-01 00:00:00
abstract：:The basic physical and functional unit of heredity; made up of DNA, they act as instructions to make proteins. There are about 20,000-25,000 genes in humans, with size varying from a few hundred DNA bases to more than 2 million bases. Most genes are the same in all people; less than 1% differ. Each person has two copi...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-95046-4_7
更新日期：2018-01-01 00:00:00
abstract：:Virtual imaging, image manipulation and morphometric methods are increasingly used in medicine and the natural sciences. Virtual imaging hardware and image manipulation software allows us to readily visualise, explore, alter, repair and study digital objects. This suite of equipment and tools combined with statistical...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-24281-7_6
更新日期：2019-01-01 00:00:00
abstract：:Oxytocin is a nonapeptide hormone that participates in the regulation of parturition and lactation. It has also been implicated in various behaviors, such as mating and maternal, and memory. To investigate whether or not oxytocin (OT) is essential for any of these functions, we eliminated, by homologous recombination,...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-4871-3_30
更新日期：1998-01-01 00:00:00
abstract：:This book highlights contributions from leaders in the field of sigma receptor research. Sigma receptors represent a promising, novel target for the treatment of neurodegenerative diseases, retinal degenerations, pain and substance abuse. Information is presented about tracers for molecular imaging these receptors, th...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-319-50174-1_1
更新日期：2017-01-01 00:00:00
abstract：:The mechanisms of sensory transduction in the fine nerve terminals of free nerve endings supplied by Adelta and C sensory axons are largely a matter of speculation. This is because the nerve terminals are small and inaccessible, particularly in intact tissues like skin. However, some of the difficulties associated wit...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-0713-0_3
更新日期：2002-01-01 00:00:00
abstract：:The extracellular calcium ([Formula: see text])-sensing receptor (CaSR) was the first GPCR identified whose principal physiological ligand is an ion, namely extracellular Ca(2+). It maintains the near constancy of [Formula: see text] that complex organisms require to ensure normal cellular function. A wealth of inform...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-94-007-2888-2_5
更新日期：2012-01-01 00:00:00
abstract：:We review here the covalent photo-binding induced by visible light between the essential amino acid tryptophan and the vitamin riboflavin. We discuss the biological implications of this photoadduct in relation to the hepatotoxic and cytotoxic effect associated to parenteral nutrients and to culture media exposed to th...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4899-2626-5_3
更新日期：1991-01-01 00:00:00
abstract：:New methods have been developed for the preparation of highly purified gangliosides, homogeneous in the saccharide, long chain base, and fatty acid moieties and gangliosides carrying different kinds of labelled probes. Gangliosides, homogeneous in the oligosaccharide portion, were prepared by preparative normal phase ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4613-1663-3_16
更新日期：1988-01-01 00:00:00
abstract：:We have examined the question of how hormones regulate the biosynthesis of gonadotropins. In particular we have studied the effects of gonadal sex steroid hormones on the regulation of LH subunit gene expression to determine whether they may occur at the pre-translational level. Success in the molecular cloning of cDN...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4684-5209-9_11
更新日期：1986-01-01 00:00:00
