Abstract:
:The physiological importance of the intestinal plasma membrane calcium pump, isoform 1, (Pmca1, Atp2b1), in calcium absorption and homeostasis has not been previously demonstrated in vivo. Since global germ-line deletion of the Pmca1 in mice is associated with embryonic lethality, we selectively deleted the Pmca1 in intestinal absorptive cells. Mice with loxP sites flanking exon 2 of the Pmca1 gene (Pmca1(fl/fl)) were crossed with mice expressing Cre recombinase in the intestine under control of the villin promoter to give mice in which the Pmca1 had been deleted in the intestine (Pmca1(EKO) mice). Pmca1(EKO) mice were born at a reduced frequency and were small at the time of birth when compared to wild-type (Wt) littermates. At two months of age, Pmca1(EKO) mice fed a 0.81% calcium, 0.34% phosphorus, normal vitamin D diet had reduced whole body bone mineral density (P < 0.037), and reduced femoral bone mineral density (P < 0.015). There was a trend towards lower serum calcium and higher serum parathyroid hormone (PTH) and 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3) concentrations in Pmca1(EKO) mice compared to Wt mice but the changes were not statistically significant. The urinary phosphorus/creatinine ratio was increased in Pmca1(EKO) mice (P < 0.004). Following the administration of 200 ng of 1α,25(OH)2D3 intraperitoneally to Wt mice, active intestinal calcium transport increased ∼2-fold, whereas Pmca1(EKO) mice administered an equal amount of 1α,25(OH)2D3 failed to show an increase in active calcium transport. Deletion of the Pmca1 in the intestine is associated with reduced growth and bone mineralization, and a failure to up-regulate calcium absorption in response to 1α,25(OH)2D3.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ryan ZC,Craig TA,Filoteo AG,Westendorf JJ,Cartwright EJ,Neyses L,Strehler EE,Kumar Rdoi
10.1016/j.bbrc.2015.09.087subject
Has Abstractpub_date
2015-11-06 00:00:00pages
152-6issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(15)30604-5journal_volume
467pub_type
杂志文章abstract::Force impulse is thought to be generated in muscle when myosin head (S-1), while weakly bound to actin filament, undergoes orientational change to form a strong (rigor) bond with actin. There is ample evidence that this bond involves interaction of 1 myosin head with 1 actin monomer. However, X-ray diffraction data of...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(91)91990-t
更新日期:1991-05-31 00:00:00
abstract::We have isolated mouse cDNA clones that encode a newly discovered collagenous polypeptide. Four overlapping cDNA clones contained an open reading frame of 1140 amino acid residues of collagenous and non-collagenous domains. The predicted polypeptide consists of 10 collagenous domains of various length that are interru...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1993.2288
更新日期:1993-10-29 00:00:00
abstract::Genes are organized as chromatin domains and positioned in the nucleus through regions of nuclear matrix association, termed MARs. Although well-studied, the mechanisms regulating expression of the beta-globin locus remain an enigma. Here, we show that certain MAR sequences of the beta-globin locus are conserved and r...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1997.7939
更新日期:1998-01-14 00:00:00
abstract::Antibodies subjected to SDS-polyacrylamide gel electrophoresis and transferred to nitrocellulose paper, have been found to retain the ability to bind specific antigen. This has been demonstrated for two groups of antibodies, directed to a) a large molecular weight glycoprotein of the human milk fat globule and b) huma...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(85)91238-0
更新日期:1985-12-31 00:00:00
abstract::We have developed a multi-target cell tracking program TADOR, which we applied to a series of fluorescence images. TADOR is based on an active contour model that is modified in order to be free of the problem of locally optimal solutions, and thus is resistant to signal fluctuation and morphological changes. Due to ad...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2011.12.100
更新日期:2012-01-20 00:00:00
abstract::Nuclei of the dorsolateral prostate of rats contain a large amount of androgen-dependent non-histone protein (20K-NHP) (mol. wt. not equal to 20,000; pI not equal to 11.5) (Matuo et al. (1]. Its content in the nuclei increased most markedly during 4-8 weeks of age, when functional differentiation of the prostate was m...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(84)91326-3
更新日期:1984-01-30 00:00:00
abstract::In Wernicke's encephalopathy and thiamine deficiency (TD), the cause of this brain disorder, development of inflammation is an important aspect of the disease process. How this pathological mechanism relates to the neurologic impairment associated with TD, however, remains unclear. A key feature of the inflammatory pr...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2010.09.128
更新日期:2010-11-05 00:00:00
abstract::Extracellular matrix facilitates anchorage-dependent cell survival via interaction of its arginine-glycine-aspartate (RGD) motif with integrins. In this report, we describe an unexpected, apoptosis-promoting the effect of immobilized RGD (iRGD) on tumor necrosis factor-alpha (TNF-alpha)-induced apoptosis. Mesangial ce...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2000.3654
更新日期:2000-10-22 00:00:00
abstract::The pattern of micrococcal nuclease digestion of chromatin from different organs of Allium cepa has been studied. The DNA from small oligonucleosomes appears to be highly degraded and heterogeneous. In solutions of intermediate ionic strength (0.15 M NaCl) histones H2A and H2B form dimers, however at high salt concent...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(85)91940-0
更新日期:1985-06-28 00:00:00
abstract::Nitric oxide (NO*) is produced endogenously from NOS isoforms bound to sarcolemmal (SL) and sarcoplasmic reticulum (SR) membranes. To investigate whether locally generated NO* directly affects the activity of enzymes mediating ion active transport, we studied whether knockout of selected NOS isoforms would affect the ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/S0006-291X(02)00599-5
更新日期:2002-06-28 00:00:00
abstract::4alpha-Carbinolamine dehydratase is a bifunctional protein involved in the regeneration of tetrahydrobiopterin during the hydroxylation of the aromatic amino acids. It is also a dimerization cofactor of HNF1 and therefore is believed to function as part of the hepatic gene transcription system. In view of the recent d...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1997.7336
更新日期:1997-09-18 00:00:00
abstract::Clinicians successfully utilize high uptake of radiolabeled glucose via PET scanning to localize metastases in melanoma patients. To take advantage of this altered metabolome, 3-bromopyruvate (BrPA) was used to overcome the notorious resistance of melanoma to cell death. Using four melanoma cell lines, BrPA triggered ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2010.04.126
更新日期:2010-05-28 00:00:00
abstract::Mg2+ is essential for guanosine triphosphatase activity and plays key roles in guanine nucleotide binding and preserving the structural integrity of GTP-binding proteins. To understand the structural basis for Mg2+ function during the GDP/GTP exchange process, we determined the crystal structure of Delta9-Sar1-GDP at ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2006.07.148
更新日期:2006-09-29 00:00:00
abstract::An inactive form of acrosin was extracted from epididymal boar spermatozoa utilizing acid pH conditions. When subjected to activation in alkaline environment, this form turns into an enzymatically active species, which exhibits close-related electrophoretic characteristics. Both the precursor and the activated species...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(86)90257-3
更新日期:1986-07-16 00:00:00
abstract::Sepsis, the systemic response to infection, is the leading cause of death in the intensive care units worldwide. Septic patients can succumb through the development of early refractory hypotension or late multiple organ dysfunction. Misregulation of apoptosis during sepsis may contribute to cellular dysfunction and mu...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2011.07.080
更新日期:2011-08-26 00:00:00
abstract::Leprechaunism is an inherited disorder characterized by growth restriction and severe insulin resistance and caused by mutations in the insulin receptor gene. Cells from these patients have defective insulin binding. Fibroblasts from some patients have concomitant defects in other tyrosine kinase receptors, such as th...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1993.2551
更新日期:1993-12-15 00:00:00
abstract::The relation between platelet-derived growth factor (PDGF)-induced smooth muscle cell migration, measured in Boyden chambers, and cellular arachidonic acid cascade was studied by using rat aortic smooth muscle cells. Partially purified PDGF stimulated cell migration significantly at a concentration of 1.33-133.0 micro...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(83)91697-2
更新日期:1983-05-16 00:00:00
abstract::Most studies characterizing H-ras have been conducted in constitutively expressing cell lines. To explore the early interaction between H-ras p21 and signal transduction systems we have utilized an NIH3T3 fibroblast line transfected with a steroid inducible MMTV H-ras vector. Exposure to dexamethasone resulted in tran...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1994.2782
更新日期:1994-12-15 00:00:00
abstract::A strong overlap exists between gp170 and CYP3A substrates and inducers. In order to investigate a putative coregulation of MDR and CYPA gene expression, we measured their transcripts in human liver and after dexamethasone treatment in HepG2 cells or in different mouse tissues. In human liver, we observed no correlati...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1998.9662
更新日期:1998-11-18 00:00:00
abstract::Oxidative stress induced vascular endothelial cell injure is one of the key and initial event in the development of atherosclerosis. Septin4, as a member of GTP binding protein family, is widely expressed in the eukaryotic cells and considered to be an essential component of the cytoskeleton which is involved in many ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2018.01.105
更新日期:2018-02-05 00:00:00
abstract::Calcitonin is a key hormone involved in the regulation of calcium metabolism in vertebrates. Using oligonucleotide primers derived from consensus sequences of vertebrate calcitonin receptors, we have cloned and characterized the first representative of an invertebrate calcitonin receptor from the bivalve mollusc Crass...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2003.09.116
更新日期:2003-10-24 00:00:00
abstract::The NC1 domains from the different α(IV) collagen chains were found to exert anti-tumorigenic and/or anti-angiogenic activities. A limitation to the therapeutic use of these matrikines is the large amount of purified recombinant proteins, in the milligram range in mice that should be administered daily throughout the ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2013.02.074
更新日期:2013-03-22 00:00:00
abstract::Amyloid fibrils were isolated from amyloid-laden tissue obtained from a chronic hemodialysis patient with carpal tunnel syndrome. After solubilization in guanidine HCl, a significant amount of the protein was located in a homogeneous low molecular weight fraction. The protein was found to be identical to beta 2-microg...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(85)91948-5
更新日期:1985-06-28 00:00:00
abstract::A two fold stimulation in the incorporation of [3H-methyl] groups from [3H-methyl] methionine into phospholipids was seen in intact pancreatic islets within six minutes of exposure to a glucose concentration that stimulates insulin release. Nonstimulatory sugars, L-glucose and D-galactose, as well as dibutyryl cAMP, d...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(84)80091-1
更新日期:1984-07-31 00:00:00
abstract::Hepatocytes cultured on type I collagen proliferate in response to mitogenic growth factors yet de-differentiate. By contrast, hepatocytes on laminin-rich gels (EHS) demonstrate stable differentiated functions, while DNA synthesis is negligible. Here we have confirmed that this lack of proliferation was not due to det...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1996.1647
更新日期:1996-11-12 00:00:00
abstract::Ribose methylation of eukaryotic rRNA is directed by box C/D small nucleolar RNAs (snoRNAs), which pinpoint the nucleotide to be methylated in specific position within the rRNA sequence. Here, we report the identification of a novel double-guide C/D box snoRNA termed snR88 that directs methylation of two previously un...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2006.12.207
更新日期:2007-03-02 00:00:00
abstract::Although it is widely accepted that insulin stimulates leptin secretion, a dual action was observed using a validated in vitro system, i.e., an early (less than 48 h) inhibitory action, followed later (48-96 h) by a clear-cut stimulation. While the inhibitory phase was observed at every glucose concentration tested (f...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2000.3506
更新日期:2000-09-24 00:00:00
abstract::Rats were fed for 15 days a diet containing ammonium acetate (20% w/w) and then injected i. p. with ammonium acetate (7 mmol/Kg). Only 1 out of 18 control rats but 9 of 18 rats fed ammonium survived, indicating a protective effect of ammonium ingestion against an acute ammonia challenge. Blood ammonia returned to norm...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(88)81324-x
更新日期:1988-06-30 00:00:00
abstract::Clostridium difficile toxin A (TcdA) is one of the main pathogenic factors released by C. difficile. Due to its potent cytotoxic and proinflammatory activities, we investigated the anti-tumor activity of TcdA. CT26 colorectal cancer cells were challenged with recombinant TcdA, and it was found that TcdA could induce a...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章,收录出版
doi:10.1016/j.bbrc.2012.04.068
更新日期:2012-05-25 00:00:00
abstract::Acute respiratory distress syndrome (ARDS) is associated with high mortality and morbidity. Early diagnosis and risk stratification in patients with ARDS should improve prognosis. Unfortunately, no clinical biomarkers are available for use in early diagnosis. Quantitative proteomics is a powerful tool for biomarker di...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2016.08.125
更新日期:2016-09-23 00:00:00