ONYCHOMYCOSIS & LOCERYL NAIL LACQUER What are MYCOSES? MYCOSES Definition They are diseases provoked by fungi, that can be divided among deep or SUPERFICIAL SUPERFICIAL MYCOSES Where? Skin Hair Nails Caused by? Dermatophytes Moulds Yeasts DERMATOPHYTES Pluricelularis, filamentous ANTROPOPHILIC ZOOPHILIC GEOPHILIC Trichophyton (hair, skin, nails) Microsporum (hair, skin) Epidermophyton (skin) DERMATOPHYTOSIS Clinical forms Tinea: Body (corporis) inguinal area (cruris) feet (pedis) hands (manuum) hairy leather (capitis) CANDIDIASIS Yeast Saprofit PREDISPONENT FACTORS Patogenic (opportunist) skin - eritema, oedema, pruritus nails - paronichia,white spots, striaes Courtesy dr. Baran Courtesy dr. Baran SUPERFICIAL MYCOSIS Clinical Aspects ALTERATION OF THE COLORATION ALTERATION OF THE RELIEF ALTERATION OF THE SENSIBILITY ALTERATION OF THE CONSISTENCY Courtesy dr. Baran Courtesy dr. Baran Courtesy dr. Baran SUPERFICIAL MYCOSIS Predisponent/ Trigger Factors • HEAT • HUMIDITY • EXCESSIVE PERSPIRATION• • INDIVIDUAL SENSIBILITY • Obesity Pregnancy Circulatory problems Diabetes Corticoterapy AIDS What are ONYCHOMYCOSIS? ONYCHOMYCOSIS Definition Nails fungal infections: DERMATOPHYTES 85% Yeasts - 14% Non dermatophytes molds - 1% ONYCHOMYCOSIS Epidemiology 30-50% of all nail diseases 30% of the micoses 2 to 20% of the general population 48% of older people (70 years) 80% in toenails - 80% Caused by dermatophytes 20% in the fingernails - 75% Caused by yeasts ONYCHOMYCOSIS Prevalence (Gupta, 1998) 20 18 16 14 12 10 8 6 4 2 0 20 13,7 14,1 9,8 6,5 1,6 Onychomycosis prevalence in different ages children ADULTS 40-50 50-60 60-70 70 & older ONYCHOMYCOSIS Clinical aspects... ONYCHOMYCOSIS Clinical Forms (Baran, Hay, Tosti & Haneke,1998) DISTAL SUBUNGUAL ONYCHOMYCOSIS Courtesy dr. Baran ONYCHOMYCOSIS Clinical Forms (Baran, Hay, Tosti & Haneke,1998) SUPERFICIAL ONYCHOMYCOSIS Courtesy dr. Baran ONYCHOMYCOSIS Clinical Evolution Distal subungueal Superficial (DSO ou DLSO) (SO) TOTAL DYSTROPHIC Proximal subungueal (PSO) Endonyx (EO) ONYCHOMYCOSIS Diagnosis Courtesy dr. Baran •Direct mycologic exam ONYCHOMYCOSIS Diagnosis •Culture ONYCHOMYCOSIS Cure criteria Mycologic cure Direct exam + culture Clinical cure OVERALL ASSESMENT ONYCHOMYCOSIS Therapy General cares Local cares Topical medications Systemic medications ONYCHOMYCOSIS Treatment selection criteria Causative pathogen Potencial adverse effects Dosage schedule Patient complience Age and health of patient Prior antifungal therapy Allergic history Cost Mechanism of action Antimicotic drugs Drugs with capacity of penetrating in the membrane of the fungi, that is quite resistant, and to act: in the nuclear metabolism in the cellular breathing in the cytoplasmic membrane ONYCHOMYCOSIS Systemic Drugs OLD DRUGS Griseofulvin Cetoconazol New Drugs • Itraconazol • Terbinafine • Fluconazol •Drug interactions •ADVERSE EVENTS Headache, GI symtoms - diarrhea, dyspepsia Elevated liver function tests - 0.3 - 5% SUPERFICIAL MYCOSIS Systemic Drugs Griseofulvin ALILAMINES • Terbinafine IMIDAZOLICS • Cetoconazol • Itraconazol • Fluconazol ONYCHOMYCOSIS Old Systemic Drugs Nuclear function GRISEOFULVIN Hepatotoxicity Long term teraphy (6 months fingernails, 18 m toenails) High relapses rates Dermatophites (it doesn't act in yeasts) « Low cost » ONYCHOMYCOSIS Old Systemic Drugs CETOCONAZOL • fulminant hepatotoxicity (1:10.000) • Low cure rates • Drug interactions • Hipotalamo- hipofise - adrenal ONYCHOMYCOSIS New Systemic Drugs Itraconazol / Fluconazol / Terbinafina Reduction of: ADVANTAGES Persistence until 6 months after the interruption of the treatment • Treatment Duration • Adverse reactions incidence • Failure rates ONYCHOMYCOSIS New Systemic Drugs Itraconazol Triazole antifungal agent Increased specificity for fungal rather than mammalian cytochrome P450 enzimes Decreases the risk of drug interactions Broad spectrum (dermatophites and yeasts) Drug interactions - terfenadin, astemizol, sinvastatin, lovastatin, midazolan, triazolan, cisapride ONYCHOMYCOSIS New Systemic Drugs Itraconazol Pharmacokinetics Strong affinity for keratinazed tissue Concentration in nails 90 days after a 7 days course of medication exccds the MIC of common dermatophytes Pulse therapy - 7 days/month 2 - 3 months ONYCHOMYCOSIS New Systemic Drugs Itraconazol Efficacy Cure rates - 35 - 86% toenails Relapses - 9 - 11% (9 - 12 months) Safety Drug interactions Elevated liver function tests - 0.3 - 5% ONYCHOMYCOSIS New Systemic Drugs Terbinafine Allylamine antifungal agent Blocks ergosterol synthesis by inhibiting squalene epoxidase - increase squalene, toxic for fungal cells Limitate spectrum (activity against yeasts is variable) ONYCHOMYCOSIS New Systemic Drugs Terbinafine Pharmacokinetics Concentration in nails 90 days after a 7 days course of medication excceds the MIC of common dermatophytes 250 mg/d - 6 weeks treatment in fingernails 12 weeks treatment in toenails ONYCHOMYCOSIS New Systemic Drugs Terbinafine Efficacy Cure rates - 90%fingernails / 80% toenails Relapses - 6 - 12%(12 months) Safety Well tolerated Headache (13%), GI symtoms - diarrhea, dyspepsia ONYCHOMYCOSIS New Systemic Drugs Fluconazol Bis Triazole antifungal agent Increased specificity for fungal rather than mammalian cytochrome P450 enzimes Broad spectrum (dermatophites and yeasts) Drug interactions - terfenadin, astemizol, sinvastatin, lovastatin, midazolan, triazolan, cisapride, antiacids, rifampin, anticoagulants, phenitoin, ciclosporin, theophilin, hypoglicemic agents ONYCHOMYCOSIS New Systemic Drugs Fluconazol Pharmacokinetics Strong affinity for keratinazed tissue Levels up to 50 times those found in plasma on the stratum corneum of nails Concentration in nails 2 weeks after medication above the MIC of common dermatophytes and nondermatophytes Pulse therapy - 150 - 300mg/ once weekly ONYCHOMYCOSIS Topical Drugs CICLOPIROX (loprox*, HMR) celular breath (ATP production) “Fungicida” Nail lacquer Broad Spectrum: Dermatophites Yeasts start 3 times/ week ONYCHOMYCOSIS Topical Drugs AMOROLFINE Solution Solvent evaporation FILM • Active - 5% • Polimer (metacrílic acid) • Plastificant • Solvent (ethanol) • Active - 25% • Polimer • Plastificant ONYCHOMYCOSIS Topical Drugs - LOCERYL Adequate vehicle - film Safety Efficacy Once a week - praticity Broad- spectrum LOCERYL PHARMACOLOGICAL ASPECTS Mode of action Deprives the membrane of ergosterol and causes accumulation of unusual sterols Morphological changes in nuclear membranes, mytochondria, vacuoles, cytoplasm, cytoplasmic membrane and the cell wall Necrosis of the cell LOCERYL NAIL LACQUER Loceryl Efficacy rates 80 70 60 50 40 30 20 10 0 71 47 CLINICAL CURE MYCOLOGICAL CURE ONYCHOMYCOSIS Choose of the treatment Combined teraphy TOPICAL TOPICAL + SYSTEMIC Courtesy dr. Baran ONYCHOMYCOSIS Choose of JUST topical treatment % of nail plate affected - less than 60% Distance between the matrix and border involvement more than 6mm (next slide) Type of onychomycosis - superficial or distal subungeal Number of affected nails - 1 or 2 Disease time - less than 5 years 6 mm Courtesy dr. Baran ONYCHOMYCOSIS Choose of the treatment COMBINATE THERAPY (topical + systemic) ANY TYPE AND INVOLVEMENT IMPROVE CURE RATES REDUCE THE TIME OF TREATMENT REDUCE THE RELAPSE RATES