Quelles sont les utilisations cliniques de l’acide hyaluronique?

The unique physical Et en pluschemical properties Et en plusmultiple physiological functions De laAcide hyaluroniquehave found widespread application dansmedicine Et en plusbiomaterials....... In Le conseil des ministres1960s, Balazs [1] first used hyaluroniqueacidein complex retinal detachment surgery, achieving significant therapeutic effects; in Le conseil des ministres1970s, hyaluronic acid preparations began À propos debe applied in joint diseases; in the 1980s, hyaluronic acid emerged in the field De laaesthetics. Since then, hyaluronic acid has been increasingly applied in ophthalmology, orthopaedics, dermatology, cosmetic surgery, and other chirurgicalefields, avecrapid advancements in related research.

1 propriétés physiques et chimiques et effets physiologiques

In 1934, Professors Meyer and Palmer from the Department De laOphthalmology at ColumbiA aUniversity in the United States first isolated hyaluronic acid (HA) from the vitreous humour De lacow eyes. In 1937, Kendell and others extracted this active substance from bacteria [2]. In 1950, Karl Meyer&#Le laboratoire a réussi à élucider la structure chimique de l’acide hyaluronique [3]. L’acide hyaluronique est un polymère de poids moléculaire élevé, dont les unités structurelles de base sont l’acide d-glucuronique et la n-acétyl-d-glucosamine, liés par des liaisons glycosidiques β-1,3 et β-1,4 alternées. En raison de la présence de groupes carboxyliques acides, l’acide hyaluronique se dissocie facilement dans une solution de chlorure de sodium, libérant H+ et adoptant un état de cation polyionique acide [4], conférant ainsi ses propriétés mucopolysaccharidiques acides.

hyaluroniqueacid is widely distributed in the connective tissues De laliving organisms, such as the umbilical cord, cartilage, vitreous humour De lathe eye, blood vessel walls, joint fluid, and skin [5] [traduction]. In biological organisms, hyaluronic acid exhibits various physiological activities, including lubricating joints, regulating protein activity, inhibiting microbial invasion and the spread of toxic substances, promoting wound healing, and regulating vascular wall permeability [6] [traduction].

2 Applications cliniques en chirurgie

2.1 traitement des maladies articulaires

Hyaluronic acid is commonly found in synovial fluid in the form of Le sodiumsalts, with Hyaluronate de sodiumbeing the primary component of synovial fluid and also a component of cartilage matrix [7]. It plays a lubricating role within the joint cavity, reducing friction between connective tissues; simultaneously, it exerts elastic properties to cushion external forces exerted on joint cartilage. Injecting high-molecular-weight, high-concentration, and high-viscoelastic sodium hyaluronateinto the joint cavity can enhance the viscosity and lubricating function of synovial fluid, protect joint cartilage from further damage, and promote the healing and regeneration of joint cartilage, significantly alleviating pain and improving joint mobility [8] [traduction].

Knee osteoarthritis: Le Bannuruet al. [9] [traduction] published a Revue systématiquein 2011, which included 54 high-quality clinical randomisécontrôléLes essais(RCTs) involving 7,545 participants. The trial design compared hyaluronic acid with placebo pourthe treatment of knee osteoarthritis, administered via intra-articular injection, with the primary outcome being the reduction in pain response. Meta-analysis results showed that treatment began to show efficacy après4 weeks, reached maximum effect after 8 weeks, and the pain-relieving effect of hyaluronic acid persisted after 24 weeks. It was concluded that hyaluronic acid can serve as an effective drug pourthe treatment of knee osteoarthritis.

Temporomandibular joint disorders: Manfrediniet al. [10] [traduction] conducted a systematic review of hyaluronic acid treatment for temporomandibular joint disorders in 2010, including 19 clinical trials, of which 12 were for temporomandibular joint disorders and 7 for temporomandibular joint arthritis. The results showed that local injection of hyaluronic acid twice weekly significantly reduced pain compared with the placebo group, while joint function and mobility improved, but there was no difference in mouth opening size between the two groups; hyaluronic acid combined with aspiration was more effective than aspiration alone; and injection of hyaluronic acid in the lower part of the joint was more effective than in the upper part.

Ankle joint diseases: Loveday et al. [11] conducted a Cochrane systematic review on the intra-articular injection of hyaluronic acid for the treatment of ankle arthritis. This étudeincluded only one clinical trial with 15 participants, with a follow-up period of 6 months. All participants underwent arthroscopic minimally invasive surgery, followed by intra-articular injection of hyaluronic acid three weeks later. The results showed that hyaluronic acid did not have a significant advantage in pain relief but improved ankle joint mobility.

Shoulder joint diseases: Saito et al. [12] [en] conducted a systematic review in 2010 on the efficacy and La sécuritéof hyaluronic acid shoulder injections for chroniqueshoulder pain. A total of 19 RCTs and 2,120 participants were included. The results showed that hyaluronic acid injections into the shoulder effectively alleviated chronic shoulder pain and improved shoulder joint function, with no significant difference in the total number of adverse reactions between the two groups. This study also conducted a subgroup analysis comparing hyaluronic acid with corticosteroids, which showed that the hyaluronic acid group had better recovery of shoulder joint function than the corticosteroid group.

2.2. -    Pour la réparation des plaies

L’acide hyaluronique est l’un des principaux composants de la matrice extracellulaire de l’épiderme et du derme de la peau humaine [13] [en]. Il améliore les conditions de croissance des cellules de la peau et fournit un environnement externe optimal pour la synthèse de collagène et de fibres élastiques dans les cellules cutanées [14] [traduction]. Il protège également les cellules des tissus endommagés contre les bactéries pathogènes, réduit les réponses inflammatoires [15] [traduction], améliore la cicatrisation et la régénération des plaies, et accélère la régénération des tissus de la peau.

Trauma repair: Voigt et al. [16] conducted a systematic review and meta-analysis of hyaluronic acid treatment for trauma in 2012. This study included 10 RCTs, 4 of which involved hyaluronic acid treatment for burns and 6 for ulcerated wounds. The results showed that hyaluronic acid accelerated wound healing in burn patients, shortened healing time, and higher concentrations of hyaluronic acid formulations were more beneficial for burn repair.

Postoperative wound repair: Metwallyet al. [17] [traduction] published a systematic review in 2007 on the use of hyaluronic acid solutions to prevent postoperative adhésionsafter gynaecological surgery, including 4 RCTs. The results showed that the incidence of adhesions was lower in the hyaluronic acid group than in the control group after gynaecological surgery; in Les patientswho had developed adhesions, hyaluronic acid reduced the incidence of further adhesion progression, but there was no difference in the improvement rate of adhesions between the two groups. À propos de nouset al. [18] [traduction] published a systematic review in 2012, including five RCTs. The meta-analysis results showed that cross-linked hyaluronic acid Le gelreduces the incidence of adhesions after gynaecological surgery; in laparoscopic myomectomy, hyaluronic acid reduces the incidence of adhesions between the wound and the peritoneum; and in hysteroscopic gynaecological surgery, hyaluronic acid reduces the incidence of adhesions between the wound and the uterus.

2.3. -    Pour les affections de la peau

Hyaluronic acid is the most effective natural moisturising agent discovered to date, possessing powerful water-binding and moisturising properties, capable of absorbing approximately 1,000 times its own weight in water. With age, nutritional deficiencies, sun exposure, environmental stressors, and other factors, the body's ability to synthesise hyaluronic acid gradually decreases, leading to a reduction in its concentration in the skin. This ultimately results in keratinisation, wrinkles, ageing, and even inflammatory reactions in the skin.

Actinic keratosis: Guptaet al. [19] [traduction] published a systematic review in 2012, conducting a meta-analysis of various treatment measures for actinic keratosis. The study included three randomised controlled trials (RCTs) on hyaluronic acid treatment for actinic keratosis. The intervention in the treatment group was a 3% diclofenac sodium solution containing 2.5% hyaluronic acid, while the control group received a placebo. A total of 420 participants were included. The results showed that the efficacy rate in the treatment group was higher than that in the control group.

Les rayonnementsdermatitis: Kirova et al. [20] conducted a La phaseIII. Le droit de la familleclinical trial En utilisanta randomised controlled blinded method to investigate the effect of hyaluronic acid on radiation dermatitis following radiotherapy for chest tumours. A total of 200 participants were included, with the intervention group receiving hyaluronic acid ointment and the control group receiving traditional moisturising ointment. The results showed that the incidence of radiation dermatitis was not significantly different between the two groups; however, the skin colour at the radiation site was better in the experimental group than in the control group. Additionally, the pain response in patients with radiation dermatitis was reduced after using hyaluronic acid cream. Pinnix et al. [21] conducted a randomised controlled clinical trial involving 130 participants. They compared the effects of hyaluronic acid gel and vaseline gel on the skin at the radiation site in female seinLe cancerpatients undergoing radiotherapy. Applied hyaluronic acid gel versus vaseline gel to the irradiated areas. Results showed that hyaluronic acid did not reduce the incidence of grade 2 or higher radiation dermatitis.

Scleroderma: Yu Chunshui et al. [22] [en] investigated the treatment of advanced localized scleroderma, enrolling 22 patients with scleroderma. Participants were randomly assigned to two groups: the experimental group (11 patients) received hyaluronic acid spot injections once every 5 weeks for a total of 15 weeks, while the control group (11 patients) received hyaluronic acid spot injections once weekly for a total of 15 weeks. At the end of week 15, the efficacy rate in the experimental group was 90.91%, while in the control group it was 45.45%. One adverse reActions à entreprendreoccurred in the experimental group and three in the control group, all manifesting as swelling at the injection site. The results indicate that hyaluronic acid is safer and more effective than hyaluronidase for the treatment of scleroderma.

Skin rejuvenation: Narins et al. [23] [en] selected 138 middle-aged and elderly female patients and conducted a comparative study on the efficacy of hyaluronic acid and collagen protein subcutaneous injections for the removal of nasolabial folds. The injection frequency was once every 2 weeks until the nasolabial folds faded to a satisfactory effect, with a maximum treatment duration of 6 months. The results showed that after 6 months, the efficacy rate for fading nasolabial folds was 59.6% in the hyaluronic acid group and 9.5% in the collagen group; among those who achieved satisfactory results, the number of injections required was fewer in the hyaluronic acid group than in the collagen group; there were no significant differences in post-injection reactions or tolerability between the two groups.

2.4. -    Applications dans les maladies ophtalmiques

Sodium hyaluronate is an important component of aqueous humour and vitreous humour, protecting the corneal endothelium, iris, and retina [24] [traduction]. Injection of sodium hyaluronate into the anterior chamber maintains anterior chamber depth; injection into the vitreous cavity aids in retinal repositioning; and in ophthalmic surgery, it reduces intraoperative or postoperative adhesions. Hyaluronic acid can also adsorb and bind large amounts of water molecules, preventing ocular dryness, and is used for corneal damage caused by or associated with dry oeilsyndrome, intrinsic disorders, or external stimuli [25] [traduction].

Dry eye disease: mcdonald’Set al. [26] [en] selected 39 patients with dry eye disease and conducted a randomised crossover controlled trial to comparerthe therapeutic effects De 0,1%sodium hyaluronate and polyvinyl alcohol. A total of 32 patients completed the entire two-way crossover trial. Both groups received local topical instillation three to four times daily. After four weeks of treatment and control measures, the groups were crossed over and treated for another four weeks. The results showed that the burning sensation was significantly lower in the hyaluronic acid group than in the polyvinyl alcohol group, and the recovery of corneal function was better in the hyaluronic acid group than in the polyvinyl alcohol group (P = 0.04 < 0.05).

Kératite: Liu Jun [27] a publié en 2011 un essai clinique contrôlé randomisé sur le traitement de la kératite du virus de l’herpès simplex avec de l’acide hyaluronique. Au total, 26 sujets ont été inclus, dont 14 dans le groupe traité et 12 dans le groupe témoin. Les mesures de traitement pour le groupe de traitement étaient:0,1% acide hyaluronique gouttes pour les yeuxLe groupe témoin a reçu des gouttes pour les yeux de Tylenol associées au ganciclovir. Les résultats ont montré que les gouttes ophtalmiques à l’acide hyaluronique pourraient raccourcisser le temps de guérison épithéliale et améliorer l’acuité visuelle chez les patients atteints de kératite épithéliale herpès simplex.

Low intraocular pressure: Kucukerdonmez et al. [28] conducted a clinical study on the treatment of chronic low intraocular pressure with hyaluronic acid, enrolling 32 patients with low intraocular pressure, with an average age of 56.8 years. The treatment involved intravitreal injection of sodium hyaluronate. After treatment, patients recovered well, indicating that hyaluronic acid is effective for treating low intraocular pressure.

Eye burns: Zhao Fajun et al. [29] treated patients with eye burns using traditional methods such as erythromycin or tetracycline eye ointment, chloramphenicol eye drops, and atropine for mydriasis when necessary. Additionally, they administered 0.1% sodium hyaluronate eye drops combined with 2% ofloxacin eye drops every 4 hours. Results showed that early application of sodium hyaluronate after eye burns reduced severe complications and disability rates.

2.5 autres

Ye Shufen [30] and Lai Hanbiao et al. [31] reported that the use of hyaluronic acid gel after dental implant surgery effectively reduces pain responses and alleviates redness and swelling. Wu et al. [32] and Wang Jianping et al. [33] found that hyaluronic acid administered to patients after dacryocystitis surgery promotes the recovery of lacrimal sac function and reduces postoperative scarring.

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