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貨期:
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用途:
For Research Use Only. Not for use in diagnostic or therapeutic procedures.
In presence of calcium ions, it binds to surfactant phospholipids and contributes to lower the surface tension at the air-liquid interface in the alveoli of the mammalian lung and is essential for normal respiration. Enhances the expression of MYO18A/SP-R210 on alveolar macrophages.
基因功能參考文獻:
SP-A expression was up-regulated in the middle ear effusion of non-typeable Haemophilus influenza otitis media. PMID: 30055742
SPA binds dipalmitoyl-phosphatidylcholine, the major surfactant lipid component, but not phosphatidylinositol; SPD exhibits the opposite preference. Data suggest flexibility in a key surface loop supports distinctive lipid binding of SPA; quadruple mutant SPA (E171D/P175E/R197N/K203D) that introduces SPD-like loop-stabilizing Ca2+ binding site in carbohydrate recognition domain exhibits ligand-binding preferences of SPD. PMID: 28719181
Downregulation of SP-A expression caused due to silica is an important factor in the occurrence and development of silicosis. PMID: 27660222
Liraglutide activates the GLP1 receptor, increasing ACE2 expression, reversing right ventricle hypertrophy, and improving the production of SP-A and SP-B in the lungs of Type 1 Diabetes rats PMID: 26196539
Mutations of rat surfactant protein A have distinct effects on its glycosylation, secretion, aggregation and degradation. PMID: 25242514
Dual positive effects of leptin were found on protein expression and transcriptional activity of thyroid transcription factor-1 PMID: 23894445
VIP can up-regulate the expression of SP-A in alveolar type II cells. PMID: 21166190
NG-nitro-L-arginine can protect the lung from LPS-induced injury by up-regulating the expression of PS. PMID: 20663300
A novel role is demonstrated for SP-A in modulating endolysosomal trafficking via Rab7b (but not Rab5 nor Rab11) in primary alveolar macrophages, and the biochemical pathways are defined. PMID: 21248257
SP-A stimulates the release of neutrophil chemotactic factor by alveolar type II cells, and this effect is mediated by the receptor for SP-A specifically expressed by these cells. PMID: 20473679
VIP elevated SP-A expression in ATII cells which was mediated by enhanced sp-a gene transcription PMID: 20688121
crystal structures of calcium-dependent complexes of the C-terminal neck and carbohydrate recognition domain of SP-A with carbohydrates PMID: 21047777
The SPA level decreases significantly in acute pulmonary embolism. PMID: 16207426
Data suggest that the pathway for secretion of newly synthesized surfactant protein-A is by transfer from the site of synthesis to the storage/secretory organelle prior to lamellar body exocytosis. PMID: 20382745
the ability of SP-A to inhibit immune cell activation by Re-LPS may be due to its ability to block the binding of Re-LPS to LBP and prevent the initiation of the LBP/CD14 pathway for inflammatory reactions in the lung. PMID: 12204898
SP-A selectively enhances mannose receptor expression on monocyte-derived macrophages, a process involving both the attached sugars and collagen-like domain of SP-A. PMID: 12244146
SP-A can reverse the detrimental effects of surfactant oxidation on the biophysical properties of surfactant, by a mechanism that is dependent on interchain disulfide bond formation and the C-terminal domains of the protein. PMID: 12600986
SP-A and SP-D are antimicrobial proteins that directly inhibit the growth of Histoplasma capsulatum by increasing permeability of the organism PMID: 12857753
blocks secretagogue-stimulated phospholipid release, even in the presence of surfactant-like lipid PMID: 12882765
Results suggest that there is no primary deficiency of surfactant proteins A, B, or C in the nitrofen-induced rat model of congenital diaphragmatic hernia. PMID: 12904592
Crystal structure of trimeric carbohydrate recognition and neck domains of surfactant protein A PMID: 12913002
SP-A enhances the phagocytosis of S. pneumoniae by alveolar macrophages through a CK2-dependent increase of cell surface SR-A localization (scavenger receptor a) PMID: 14993215
SP-A and SP-D enhance mannose receptor-mediated phagocytosis of M. avium by macrophages PMID: 15187139
Differential allele-specific expression was observed in all tissues studied (OPN) or in all extrapulmonary tissues (SP-A). Double heterozygous rats revealed lack of coordinate allele expression among SP-A, SP-D, and OPN. PMID: 15482851
NO mediated the decrease in surfactant protein gene expression PMID: 15640287
We suggest that enhanced release of surfactant phospholipids and SP-A represents an early protective response that compensates in part for the inactivation of intraalveolar surfactant in the early phase of IR injury. PMID: 15969762
The addition of rat or recombinant rat SP-A to human monocyte-derived macrophages significantly raises the level of cytosolic calcium above baseline within 10 seconds of SP-A addition PMID: 16081790
SP-A and Prdx6 directly interact, which provides a mechanism for regulation of the PLA(2) activity of Prdx6 by SP-A PMID: 16330552
results indicated SP-A & SP-D have distinct functions in lung homeostasis & the function of the neck domain & carbohydrate recognition domain of SP-D is dependent on its own NH2-terminal & collagenous domains that cannot be complemented by those of SP-A PMID: 16500946
Direct effect of SFTPA1 on rat myometrial cells and inhibitory cross talk between SFTPA1 and LPS signals. PMID: 17202387
SP-A2 enhances phagocytosis of Pseudomonas aeruginosa by rat alveolar macrophages more than does SP-A1. PMID: 17220308
Air spaces of neonatal lungs comprised lower fractions of tubular myelinand increased unilamellar vesicles, which correlated with low SP-A concentrations in lung lavage fluid and increased respiratory rates, respectively PMID: 17469149
alterations of surfactant are a consequence of the ventilation strategy that impair the biophysical activity of this material and thereby contribute directly to lung dysfunction over time PMID: 18344412
cigarette smoke alone decreases the level of SP-A and that might have an important effect on surfactant metabolism and the host defense functions of surfactant in the peripheral airways PMID: 18480979
After OVA challenge alveolar epithelial cells Type II (AEII) show a significantly higher expression of SP-A and SP-D leading also to higher amounts of both SPs in BALF, and macrophages gather predominantly SP-A. PMID: 18802356
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亞細胞定位:
Secreted, extracellular space, extracellular matrix. Secreted, extracellular space, surface film.