関: hyaluronan、hyaluronic acid

hyaluronic acid

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/08/22 21:44:06」(JST)

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Hyaluronan /haɪˈæljʊrənən/ (also called hyaluronic acid /ˌhaɪəl.jʊˈrɒnɨk/, hyaluronate /ˌhaɪəlˈjʊərəneɪt/ or /ˌhaɪəˈlʊərəneɪt/, or HA) is an anionic, nonsulfated glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues. It is unique among glycosaminoglycans in that it is nonsulfated, forms in the plasma membrane instead of the Golgi, and can be very large, with its molecular weight often reaching the millions.^[2] One of the chief components of the extracellular matrix, hyaluronan contributes significantly to cell proliferation and migration, and may also be involved in the progression of some malignant tumors.^[3]

The average 70 kg (154 lb) person has roughly 15 grams of hyaluronan in the body, one-third of which is turned over (degraded and synthesized) every day.^[4] Hyaluronic acid is also a component of the group A streptococcal extracellular capsule,^[5] and is believed to play a role in virulence.^[6]^[7]

1 Structure
2 Biological synthesis
3 Functions
4 Degradation
5 Cell receptors for hyaluronan
6 Clinical significance
- 6.1 Cancer
- 6.2 Wound repair
- 6.3 Inflammation
- 6.4 Granulation and organization of the granulation tissue matrix
- 6.5 Cell migration
- 6.6 Skin healing
- 6.7 Fetal wound healing and scarring
- 6.8 Cosmetic uses
7 Etymology
8 History
9 Approval
10 Other animals
11 Research
12 See also
13 References
14 External links

Structure

Properties of hyaluronan were first determined in the 1930s in the laboratory of Karl Meyer.^[8] Hyaluronan is a polymer of disaccharides, themselves composed of D-glucuronic acid and D-N-acetylglucosamine, linked via alternating β-1,4 and β-1,3 glycosidic bonds. Hyaluronan can be 25,000 disaccharide repeats in length. Polymers of hyaluronan can range in size from 5,000 to 20,000,000 Da in vivo. The average molecular weight in human synovial fluid is 3–4 million Da, and hyaluronan purified from human umbilical cord is 3,140,000 Da.^[9]

Hyaluronan is energetically stable, in part because of the stereochemistry of its component disaccharides. Bulky groups on each sugar molecule are in sterically favored positions, whereas the smaller hydrogens assume the less-favorable axial positions.

Biological synthesis

Hyaluronan is synthesized by a class of integral membrane proteins called hyaluronan synthases, of which vertebrates have three types: HAS1, HAS2, and HAS3. These enzymes lengthen hyaluronan by repeatedly adding glucuronic acid and N-acetylglucosamine to the nascent polysaccharide as it is extruded via ABC-transporter through the cell membrane into the extracellular space.^[10]

Hyaluronan synthesis (HAS) has been shown to be inhibited by 4-methylumbelliferone (hymecromone, heparvit), a 7-hydroxy-4-methylcoumarin derivative.^[11] This selective inhibition (without inhibiting other glycosaminoglycans) may prove useful in preventing metastasis of malignant tumor cells.^[12] There is feedback inhibition of hyaluronan synthesis by low molecular weight hyaluronan (<500kDa) at high concentrations but stimulation by high molecular weight (>500kDa) HA when tested in cultured human synovial fibroblasts.^[13]

Bacillus subtilis recently has been genetically modified (GMO) to culture a proprietary formula to yield hyaluronans,^[14] in a patented process producing human-grade product.

Functions

Until the late 1970s, hyaluronan was described as a "goo" molecule, a ubiquitous carbohydrate polymer that is part of the extracellular matrix.^[15] For example, hyaluronan is a major component of the synovial fluid, and was found to increase the viscosity of the fluid. Along with lubricin, it is one of the fluid's main lubricating components.

Hyaluronan is an important component of articular cartilage, where it is present as a coat around each cell (chondrocyte). When aggrecan monomers bind to hyaluronan in the presence of HAPLN1 (Hyaluronan and proteoglycan link protein 1), large, highly negatively charged aggregates form. These aggregates imbibe water and are responsible for the resilience of cartilage (its resistance to compression). The molecular weight (size) of hyaluronan in cartilage decreases with age, but the amount increases.^[16]

Hyaluronan is also a major component of skin, where it is involved in tissue repair. When skin is exposed to excessive UVB rays, it becomes inflamed (sunburn) and the cells in the dermis stop producing as much hyaluronan, and increase the rate of its degradation. Hyaluronan degradation products then accumulate in the skin after UV exposure.^[17]

While it is abundant in extracellular matrices, hyaluronan also contributes to tissue hydrodynamics, movement and proliferation of cells, and participates in a number of cell surface receptor interactions, notably those including its primary receptors, CD44 and RHAMM. Upregulation of CD44 itself is widely accepted as a marker of cell activation in lymphocytes. Hyaluronan's contribution to tumor growth may be due to its interaction with CD44. Receptor CD44 participates in cell adhesion interactions required by tumor cells.

Although hyaluronan binds to receptor CD44, there is evidence hyaluronan degradation products transduce their inflammatory signal through toll-like receptor 2 (TLR2), TLR4 or both TLR2, and TLR4 in macrophages and dendritic cells. TLR and hyaluronan play a role in innate immunity.

There are limitations including the in vivo loss of this compound limiting the duration of effect.^[18]^[19]

Degradation

Hyaluronan is degraded by a family of enzymes called hyaluronidases. In humans, there are at least seven types of hyaluronidase-like enzymes, several of which are tumor suppressors. The degradation products of hyaluronan, the oligosaccharides and very low-molecular-weight hyaluronan, exhibit pro-angiogenic properties.^[20] In addition, recent studies showed hyaluronan fragments, not the native high-molecular mass of hyaluronan, can induce inflammatory responses in macrophages and dendritic cells in tissue injury and in skin transplant^[21]^[22]

Cell receptors for hyaluronan

So far, cell receptors that have been identified for HA fall into three main groups: CD44, Receptor for HA-mediated motility (RHAMM) and intercellular adhesion molecule-1 (ICAM-1). CD44 and ICAM-1 were already known as cell adhesion molecules with other recognized ligands before their HA binding was discovered.^[23]

CD44 is widely distributed throughout the body, and the formal demonstration of HA-CD44 binding was proposed by Aruffo et al.^[24] in 1990. To date, it is recognized as the main cell surface receptor for HA. CD44 mediates cell interaction with HA and the binding of the two functions as an important part in various physiologic events,^[23]^[25] such as cell aggregation, migration, proliferation and activation; cell–cell and cell–substrate adhesion; endocytosis of HA, which leads to HA catabolism in macrophages; and assembly of pericellular matrices from HA and proteoglycan. Two significant roles of CD44 in skin were proposed ^[26] The first is regulation of keratinocyte proliferation in response to extracellular stimuli, and the second is the maintenance of local HA homeostasis.^[25]

ICAM-1 is known mainly as a metabolic cell surface receptor for HA, and this protein may be responsible mainly for the clearance of HA from lymph and blood plasma, which accounts for perhaps most of its whole-body turnover.^[23]^[27] Ligand binding of this receptor, thus, triggers a highly coordinated cascade of events that includes the formation of an endocytotic vesicle, its fusion with primary lysosomes, enzymatic digestion to monosaccharides, active transmembrane transport of these sugars to cell sap, phosphorylation of GlcNAc and enzymatic deacetylation.^[23]^[28]^[29] Like its name, ICAM-1 may also serve as a cell adhesion molecule, and the binding of HA to ICAM-1 may contribute to the control of ICAM-1-mediated inflammatory activation.^[25]

Clinical significance

Hyaluronan has been used in attempts to treat osteoarthritis of the knee via injecting it into the joint. It has not been proven, however, to generate significant benefit and has potentially severe adverse effects.^[30]

Dry, scaly skin (xerosis) such as that caused by atopic dermatitis (eczema) may be treated with a prescription skin lotion containing sodium hyaluronate as its active ingredient.^[31]

Cancer

In some cancers, hyaluronan levels correlate well with malignancy and poor prognosis. Hyaluronan is, thus, often used as a tumor marker for prostate and breast cancer. It may also be used to monitor the progression of the disease.^[32]^[33]

Hyaluronan may also be used postoperatively to induce tissue healing, notably after cataract surgery.^[34] Current models of wound healing propose the larger polymers of hyaluronic acid appear in the early stages of healing to physically make room for white blood cells, which mediate the immune response.

Figure 1. The process of cancer metastasis in which HA-associated molecules play a role in the steps. Abbreviations: hyaluronic acid (HA), hyaluronic acid synthase (HAS), hyaluronic acid receptor (HAR), hyaluronidase (HAase/HYAL)^{[citation needed]}

As shown in Figure 1, the various types of molecules that interact with hyaluronan can contribute to many of the stages of cancer metastasis, i.e. further the spread of cancer.^{[citation needed]}

Hyaluronan synthases (HAS) play roles in all of the stages of cancer metastasis. By producing anti-adhesive HA, HAS can allow tumor cells to release from the primary tumor mass, and if HA associates with receptors such as CD44, the activation of Rho GTPases can promote epithelial-mesenchymal transition (EMT) of the cancer cells. During the processes of intravasation or extravasation, the interaction of HAS produced HA with receptors such as CD44 or RHAMM promote the cell changes that allow for the cancer cells to infiltrate the vascular or lymphatic systems. While traveling in these systems, HA produced by HAS protects the cancer cell from physical damage. Finally, in the formation of a metastatic lesion, HAS produces HA to allow the cancer cell to interact with native cells at the secondary site and to produce a tumor for itself.^[35]

HA fragments promote angiogenesis and hyaluronidases produce these fragments.^[36] hypoxia also increases production of HA and activity of hyaluronidases.^[37]

The hyaluronan receptors, CD44 and RHAMM, are most thoroughly studied in terms of their roles in cancer metastasis. Increased clinical CD44 expression has been positively correlated to metastasis in a number of tumor types.^[38] In terms of mechanics, CD44 affects adhesion of cancer cells to each other and to endothelial cells, rearranges the cytoskeleton through the Rho GTPases, and increases the activity of ECM degrading enzymes.^[39] Increased RHAMM expression has also been clinically correlated with cancer metastasis. In terms of mechanics, RHAMM promotes cancer cell motility through a number of pathways including focal adhesion kinase (FAK), Map kinase (MAPK), pp60(c-src), and the downstream targets of Rho kinase (ROK).^[40] RHAMM can also cooperate with CD44 to promote angiogenesis toward the metastatic lesion.^[41]

Wound repair

Skin provides a mechanical barrier to the external environment and acts to prevent the ingress of infectious agents.^[42] Once injured, the tissues beneath are exposed to infection; therefore, rapid and effective healing is of crucial significance to reconstruct a barrier function. Skin wound healing is a complex process, and includes many interacting processes initiated by haemostasis and the release of platelet-derived factors.^[43] The following stages are inflammation, granulation tissue formation, reepithelization and remodeling. HA is likely to play a multifaceted role in mediation of these cellular and matrix events. The proposed roles of HA in this sequence of skin wound healing events are elucidated in details below.

Hyaluronan has also been used in the synthesis of biological scaffolds for wound-healing applications. These scaffolds typically have proteins such as fibronectin attached to the hyaluronan to facilitate cell migration into the wound. This is particularly important for individuals with diabetes suffering from chronic wounds.^[44]

Inflammation

The wound tissue in the early inflammatory phase of wound repair is abundant in HA, probably a reflection of increased synthesis.^[25] HA acts as a promoter of early inflammation, which is crucial in the whole skin wound-healing process. In a murine air pouch model of carrageenan/IL-1-induced inflammation, HA was observed to enhance cellular infiltration.^[25]^[45] showed a dose-dependent increase of the proinflammatory cytokines TNF-α and IL-8 production by human uterine fibroblasts at HA concentrations of 10 μg/mL to 1 mg/mL via a CD44-mediated mechanism. Endothelial cells, in response to inflammatory cytokines such as TNF-α, and bacterial lipopolysaccharide, also synthesize HA, which has been shown to facilitate primary adhesion of cytokine-activated lymphocytes expressing the HA-binding variants of CD44 under laminar and static flow conditions.^[25]^[46] It is interesting to note that HA has contradictory dual functions in the inflammatory process. It not only can promote the inflammation, as stated above, but also can moderate the inflammatory response, which may contribute to the stabilization of granulation tissue matrix, as described in the following part.

Although inflammation is an integral part of granulation tissue formation, for normal tissue repair to proceed, inflammation needs to be moderated. The initial granulation tissue formed is highly inflammatory with a high rate of tissue turnover mediated by matrix degrading enzymes and reactive oxygen metabolites that are products of inflammatory cells.^[25] Stabilization of granulation tissue matrix can be achieved by moderating inflammation. HA functions as an important moderator in this moderation process, which contradicts its role in inflammatory stimulation, as described above. HA can protect against free-radical damage to cells.^[47] This may attribute to its free-radical scavenging property, a physicochemical characteristic shared by large polyionic polymers. In a rat model of free-radical scavenging property, HA has been shown to reduce damage to the granulation tissue.^[48]

In addition to the free-radical scavenging role, HA may also function in the negative feedback loop of inflammatory activation through its specific biological interactions with the biological constituents of inflammation.^[25] TNF-α, an important cytokine generated in inflammation, stimulates the expression of TSG-6 (TNF-stimulated gene 6) in fibroblasts and inflammatory cells. TSG-6, a HA-binding protein, also forms a stable complex with the serum proteinase inhibitor IαI (Inter-α-inhibitor) with a synergistic effect on the latter’s plasmin-inhibitory activity. Plasmin is involved in activation of the proteolytic cascade of matrix metalloproteinases and other proteinases leading to inflammatory tissue damage. Therefore, the action of TSG-6/ IαI complex, which may be additionally organized by binding to HA in the extracellular matrix, may serve as a potent negative feedback loop to moderate inflammation and stabilize the granulation tissue as healing progresses.^[25]^[49] In the murine air pouch model of carragenan/IL-1 (Interleukin-1β)-induced inflammation, where HA has been shown to have a proinflammatory property, reduction of inflammation can be achieved by administrating TSG-6, and the result is comparable with systemic dexamethasone treatment.

Granulation and organization of the granulation tissue matrix

Granulation tissue is the perfused, fibrous connective tissue that replaces a fibrin clot in healing wounds. It typically grows from the base of a wound and is able to fill wounds of almost any size it heals. HA is abundant in granulation tissue matrix. A variety of cell functions that are essential for tissue repair may attribute to this HA-rich network. These functions include facilitation of cell migration into the provisional wound matrix, cell proliferation and organization of the granulation tissue matrix.^[25] Initiation of inflammation is crucial for the formation of granulation tissue, therefore the pro-inflammatory role of HA as discussed above also contributes to this stage of wound healing.^[25]

Cell migration

Cell migration is essential for the formation of granulation tissue.^[25] The early stage of granulation tissue is dominated by a HA-rich extracellular matrix, which is regarded as a conducive environment for migration of cells into this temporary wound matrix. Contributions of HA to cell migration may attribute to its physicochemical properties as stated above, as well as its direct interactions with cells. For the former scenario, HA provides an open hydrated matrix that facilitates cell migration,^[25] whereas, in the latter scenario, directed migration and control of the cell locomotory mechanisms are mediated via the specific cell interaction between HA and cell surface HA receptors. As discussed before, the three principal cell surface receptors for HA are CD44, RHAMM, and ICAM-1. RHAMM is more related to cell migration. It forms links with several protein kinases associated with cell locomotion, for example, extracellular signal-regulated protein kinase (ERK), p125fak, and pp60c-src.^[50]^[51]^[52] During fetal development, the migration path through which neural crest cells migrate is rich in HA.^[25] HA is closely associated with the cell migration process in granulation tissue matrix, and studies show that cell movement can be inhibited, at least partially, by HA degradation or blocking HA receptor occupancy.^[53]

By providing the dynamic force to the cell, HA synthesis has also been shown to associate with cell migration.^[54] Basically, HA is synthesized at the plasma membrane and released directly into the extracellular environment.^[25] This may contribute to the hydrated microenvironment at sites of synthesis, and is essential for cell migration by facilitating cell detachment.

Skin healing

HA plays an important role in the normal epidermis. HA also has crucial functions in the reepithelization process due to several of its properties. It serves as an integral part of the extracellular matrix of basal keratinocytes, which are major constituents of the epidermis; its free-radical scavenging function and its role in keratinocyte proliferation and migration.^[25]

In normal skin, HA is found in relative high concentrations in the basal layer of the epidermis where proliferating keratinocytes are found.^[55] CD44 is collocated with HA in the basal layer of epidermis where additionally it has been shown to be preferentially expressed on plasma membrane facing the HA-rich matrix pouches.^[25]^[56] Maintaining the extracellular space and providing an open, as well as hydrated, structure for the passage of nutrients are the main functions of HA in epidermis. A report found HA content increases at the presence of retinoic acid (vitamin A).^[55] The proposed effects of retinoic acid against skin photo-damage and aging may be correlated, at least in part, with an increase of skin HA content, giving rise to increase of tissue hydration. It has been suggested the free-radical scavenging property of HA contributes to protection against solar radiation, supporting the role of CD44 acting as a HA receptor in the epidermis.^[25]

Epidermal HA also functions as a manipulator in the process of keratinocyte proliferation, which is essential in normal epidermal function, as well as during reepithelization in tissue repair. In the wound healing process, HA is expressed in the wound margin, in the connective tissue matrix, and collocating with CD44 expression in migrating keratinocytes.^[25] Kaya et al. found suppression of CD44 expression by an epidermis-specific antisense transgene resulted in animals with defective HA accumulation in the superficial dermis, accompanied by distinct morphologic alterations of basal keratinocytes and defective keratinocyte proliferation in response to mitogen and growth factors. Decrease in skin elasticity, impaired local inflammatory response, and impaired tissue repair were also observed.^[25] Their observations are strongly supportive of the important roles HA and CD44 have in skin physiology and tissue repair.^[25]

Fetal wound healing and scarring

Lack of fibrous scarring is the primary feature of fetal wound healing. Even for longer periods, HA content in fetal wounds is still higher than that in adult wounds, which suggests that HA may, at least in part, reduce collagen deposition and therefore lead to reduced scarring.^[57] This suggestion is in agreement with the research of West et al., who showed in adult and late gestation fetal wound healing, removal of HA results in fibrotic scarring.^[25]

Cosmetic uses

Hyaluronan is a common ingredient in skin-care products. Until recently, hyaluronic acid fillers were injected using a classic sharp hypodermic needle, cutting through nerves and vessels, causing pain and bruising.

In certain cases, the hyaluronic acid fillers results in a granulomatous foreign body reaction.^[58]

Etymology

Hyaluronic acid is derived from hyalos (Greek for vitreous) and uronic acid because it was first isolated from the vitreous humour and possesses a high uronic acid content.

The term hyaluronate refers to the conjugate base of hyaluronic acid. Because the molecule typically exists in vivo in its polyanionic form, it is most commonly referred to as hyaluronan.

History

Hyaluronan is found in many tissues of the body, such as skin, cartilage, and the vitreous humour. Therefore, it is well suited to biomedical applications targeting these tissues. The first hyaluronan biomedical product, Healon, was developed in the 1970s and 1980s by Pharmacia, and is approved for use in eye surgery (i.e., corneal transplantation, cataract surgery, glaucoma surgery, and surgery to repair retinal detachment). Other biomedical companies also produce brands of hyaluronan for ophthalmic surgery.^[59]^[60]^[61]

Native hyaluronan has a relatively short half-life (shown in rabbits)^[62] so various manufacturing techniques have been deployed to extend the length of the chain and stabilise the molecule for its use in medical applications. The introduction of protein based cross-links,^[63] the introduction of free-radical scavenging molecules such as sorbitol,^[64] and minimal stabilisation of the HA chains through chemical agents e.g. NASHA stabilisation are all techniques that have been used.^[65]

In the late 1970s, intraocular lens implantation was often followed by severe corneal edema, due to endothelial cell damage during the surgery. It was evident that a viscous, clear, physiologic lubricant to prevent such scraping of the endothelial cells was needed.^[66]^[67]

Approval

FDA approved formulations are available.^[19] In 2007, the EMA extended its approval of Hylan GF-20 as a treatment for ankle and shoulder osteoarthritis pain.^[68]

Other animals

Hyaluronan is used in treatment of articular disorders in horses, in particular those in competition or heavy work. It is indicated for carpal and fetlock joint dysfunctions, but not when joint sepsis or fracture are suspected. It is especially used for synovitis associated with equine osteoarthritis. It can be injected directly into an affected joint, or intravenously for less localized disorders. It may cause mild heating of the joint if directly injected, but this does not affect the clinical outcome. Intra-articularly administered medicine is fully metabolized in less than a week.^[69]

Note that, according to Canadian regulation, hyaluronan in HY-50 preparation should not be administered to animals to be slaughtered for horse meat.^[70] In Europe, however, the same preparation is not considered to have any such effect, and edibility of the horse meat is not affected.^[71]

Naked mole rats have very high molecular weight hyaluronan (6–12 MDa) that has been shown to give them resistance against cancer.^[72] This large HA is due to both differently sequenced HAS2 and lower HA degradation mechanisms.

Research

Due to its high biocompatibility and its common presence in the extracellular matrix of tissues, hyaluronan is gaining popularity as a biomaterial scaffold in tissue engineering research.^[73]^[74]^[75] In particular, a number of research groups have found hyaluronan's properties for tissue engineering and regenerative medicine are significantly improved with crosslinking, producing a hydrogel. This added feature allows a researcher to form a desired shape, as well as to deliver therapeutic molecules, into a host.^[76] Hyaluronan can be crosslinked by attaching thiols (trade names: Extracel, HyStem),^[76]methacrylates,^[77] hexadecylamides (trade name: Hymovis),^[78] and tyramines (trade name: Corgel).^[79] Hyaluronan can also be crosslinked directly with formaldehyde (trade name: Hylan-A) or with divinylsulfone (trade name: Hylan-B).^[80]

Due to its ability to regulate angiogenesis by stimulating endothelial cells to proliferate, hyaluronan can be used to create hydrogels to study vascular morphogenesis.^[81] These hydrogels have properties similar to human soft tissue, but are also easily controlled and modified, making HA very suitable for tissue engineering studies. For example, HA hydrogels are appealing for engineering vasculature from endothelial progenitor cells by using appropriate growth factors such as VEGF and Ang-1 to promote proliferation and vascular network formation. Vacuole and lumen formation have been observed in these gels, followed by branching and sprouting through degradation of the hydrogel and finally complex network formation. The ability to generate vascular networks using HA hydrogels leads to opportunities for in vivo and clinical applications. One in vivo study, where HA hydrogels with endothelial colony forming cells were implanted into mice three days after hydrogel formation, saw evidence that the host and engineered vessels joined within 2 weeks of implantation, indicating viability and functionality of the engineered vasculature.^[82]

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External links

ATC codes: D03AX05, M09AX01, R01AX09, S01KA01
Hyaluronan at the US National Library of Medicine Medical Subject Headings (MeSH)

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 関節内および軟部組織注射：注射剤の種類および投与頻度 intraarticular and soft tissue injections what agents to inject and how frequently
2. 初期薬物療法に反応しない変形性関節症の治療 treatment of osteoarthritis resistant to initial pharmacologic therapy
3. 注入可能軟部組織充填剤：非永久性充填剤 injectable soft tissue fillers temporary agents
4. Myocardial infarction with no obstructive coronary atherosclerosis
5. 成人における関節吸引または注射：合併症 joint aspiration or injection in adults complications

English Journal

Reductive alkylation of hyaluronic acid for the synthesis of biocompatible hydrogels by click chemistry.

Huerta-Angeles G, Němcová M, Příkopová E, Smejkalová D, Pravda M, Kučera L, Velebný V.SourceContipro Biotech, Dolni Dobrouč 401, 561 02 Dolni Dobrouč, Czech Republic.
Carbohydrate polymers.Carbohydr Polym.2012 Nov 6;90(4):1704-11. Epub 2012 Jul 28.
Hyaluronan (HA) based hydrogels have been synthesized combining chemical modification of the polysaccharide by partial oxidation, reductive amination and 'click chemistry'. HA was oxidized by 4-acetamido-TEMPO-mediated reaction, using sodium hypochlorite as primary oxidant and NaBr in buffered pH, s
PMID 22944436

Impact of a model synovial fluid on supported lipid membranes.

Kreuzer M, Strobl M, Reinhardt M, Hemmer MC, Hauß T, Dahint R, Steitz R.SourceHelmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany; Angewandte Physikalische Chemie, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany.
Biochimica et biophysica acta.Biochim Biophys Acta.2012 Nov;1818(11):2648-59. Epub 2012 May 27.
The interaction of a model synovial fluid, here a solution of 3mg/mL hyaluronic acid (HA) in heavy water (D(2)O), with an oligolamellar stack of lipid (DMPC) membranes on silicon support has been studied by neutron reflectometry and infrared spectroscopy on the molecular scale at non-physiological a
PMID 22647709

Japanese Journal

臨床研究人工涙液およびヒアルロン酸ナトリウム点眼液が高次収差に及ぼす影響

山下力,越智進太郎,井上康 [他]
日本眼科学会雑誌 117(12), 963-970, 2013-12
NAID 40019912205

臨床報告涙液層破壊時間(BUT)短縮型ドライアイ患者に対するヒアルロン酸ナトリウムとジクアホソルナトリウム点眼治療後の患者満足度

内野美樹,内野裕一,深川和己 [他]
臨床眼科 67(8), 1403-1411, 2013-08
NAID 40019765402

軽症ドライアイにおけるヒアルロン酸NaからジクアホソルNaへの切り替え効果 (特集第66回日本臨床眼科学会講演集(4))

髙嶋雄二,合屋慶太,松尾雅子 [他]
臨床眼科 67(6), 929-933, 2013-06
NAID 40019697921

Related Pictures

★リンクテーブル★

リンク元	「ヒアルロン酸」「hyaluronan」
拡張検索	「sodium hyaluronate」「hyaluronate sodium」

「ヒアルロン酸」

Hyaluronan
Identifiers
CAS Registry Number	9004-61-9 ; 31799-91-4 (potassium salt) ; 9067-32-7 (sodium salt)
ATC code	D03AX05; M09AX01, R01AX09, S01KA01
ChemSpider
UNII	S270N0TRQY
Properties
Chemical formula	(C14H21NO11)n
Solubility in water	soluble (sodium salt)
Hazards
S-phrases	S22, S24/25 (sodium salt)
	Lethal dose or concentration (LD, LC):
LD50 (Median dose)	> 2400 mg/kg (mouse, oral, sodium salt); >4000 mg/kg (mouse, subcutaneous, sodium salt); 1500 mg/kg (mouse, intraperitoneal, sodium salt)
Related compounds
Related compounds	D-glucuronic acid and D-N-acetylglucosamine (monomers)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	verify (what is: /?)
	Infobox references

　　[★]

英: hyaluronate, hyaluronic acid
化: ヒアルロン酸ナトリウム hyaluronate sodium
商: アイケア、アイケアミニ、アスリカン、アダント、アドマック、アルツ、アルヒーロ、オペガン、オペガンハイ、オペリード、グリオロン、グルコジン、サイビスク、スベニール、ソルペント、ティアバランス、ディスコビスク、ニコゼット、ハリソン、ヒアール、ヒアガード、ヒアルトーワ、ヒアルロン酸Na、ヒアルロン酸Ｎａ、ヒアルロン酸ナトリウム、ヒアレイン、ヒアロス、ヒアロンサン、ヒーロン、ヒーロンV、ピオネス、ヒカミロン、ビスコート、ヒュースレン、ヒルネート、プリーラ、プロビスク、ホスビロン、ユニヒロン、ルミステロン
関: 肝線維化マーカー; 眼科用剤

ムコ多糖

臨床関連

胸水検査：ヒアルロン酸高値　→　癌性胸膜炎(原発性肺癌の浸潤、悪性胸膜中皮腫、悪性リンパ腫、転移性腫瘍(乳癌、子宮の癌、腎細胞癌、胃癌))

添付文書

ヒアレイン点眼液0.1％／ヒアレインミニ点眼液0.1％／ヒアレインミニ点眼液0.3％

http://www.info.pmda.go.jp/go/pack/1319720Q3078_1_05/1319720Q3078_1_05?view=body

「hyaluronan」

　　[★]

ヒアルロナン、ヒアルロン酸

関: hyaluronate、hyaluronic acid、sodium hyaluronate

「sodium hyaluronate」

　　[★]

ヒアルロン酸ナトリウム

関: hyaluronan、hyaluronic acid

「hyaluronate sodium」

　　[★] ヒアルロン酸。ヒアルロン酸ナトリウム

[ChemIDplus-1] Hyaluronate Sodium in the ChemIDplus database, consulté le 12 février 2009

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[Synvisc-One_.28hylan_GF-20.29_-_P940015.2FS012-19] ttp://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/DeviceApprovalsandClearances/Recently-ApprovedDevices/ucm133863.htm.

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[hylira-31] "Hylira gel: Indications, Side Effects, Warnings". Drugs.com.

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Identifiers

CAS Registry Number	9004-61-9^Y 31799-91-4 (potassium salt)^N 9067-32-7 (sodium salt)^N
ATC code	D03AX05 M09AX01, R01AX09, S01KA01
ChemSpider	^N
UNII	S270N0TRQY^Y
Properties
Chemical formula	(C₁₄H₂₁NO₁₁)_n
Solubility in water	soluble (sodium salt)
Hazards
S-phrases	S22, S24/25 (sodium salt)
Lethal dose or concentration (LD, LC):
LD₅₀ (Median dose)	> 2400 mg/kg (mouse, oral, sodium salt) >4000 mg/kg (mouse, subcutaneous, sodium salt) 1500 mg/kg (mouse, intraperitoneal, sodium salt)^[1]
Related compounds
Related compounds	D-glucuronic acid and D-N-acetylglucosamine (monomers)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is: Y/N?)
Infobox references

匿名

検索

案内

hyaluronate