microbial diseases(항결핵, 항진균, 항바이러스약) Flashcards
Isoniazid :A synthetic analog of __________
pyridoxine
Isoniazid 대표적인 AE 2가지?
Peripheral Neuritis, Hepatitis and idiosyncratic hepatotoxicity
Blocks transcription by interacting with the b subunit of bacterial but not human DNA-dep. RNA pol.
Adverse effects
➢ a harmless orange-red color to urine, sweat, and tears
Rifampin
Rifampin is _________ of CYP 450
induction
경구로 투여하는 항결핵약 5가지?
isoniazid, rifampin, ethambutol, pyrazinamide, rifabutin
항결핵약 중에
retrobulbar neuritis (loss of visual acuity and red-green color blindness)
hyperuricemia (acute gouty arthritis)
이러한 AE를 가지는 약은?
ethambutol
Alternative 2nd-line drugs for TB
a folate synthesis antagonist that is active almost exclusively against M tuberculosis.
Gastrointestinal symptoms are common (peptic ulceration and hemorrhage
p-Aminosalicylic acid (PAS)
an inhibitor of cell wall synthesis
• Inhibition of Ala racemase and D-alanyl-D-alanine synthetase
• it is used almost exclusively to treat tuberculosis caused by strains of M. tuberculosis resistant to first-line agents.
Cycloserine
결핵약의 최후의 수단으로 생각해
used in combination with other second- and third-line drugs to treat patients with tuberculosis caused by multidrug-resistant strains
Linezolid
inhibits folate synthesis.
• Resistance can emerge in large populations of M leprae, if very low doses are given.
The combination of ____________, rifampin, and clofazimine is recommended for initial therapy.
dapsone
- difficult to distinguish reactions to dapsone from manifestations of the underlying illness.
- may be suppressed by corticosteroids or by thalidomide.(면역억제제)
Erythema nodosum leprosum (나성결절홍반)
___________: infectious diseases cased by fungi
Mycoses
fungi _______ rather than cholesterol in the fungal cell membrane, which is useful for the target.
Ergosterol
Binding to ergosterol → alteration of the permeability by forming ______________-
associated pores → allows the leakage of intracellular ions/macromolecules → cell death.
amphotericin B
triazole 계와 ________은 서로 길항작용을 갖는다.
왜냐하면 ________은 ergosterol에 결합해야지 작용할 수 있기 때문이다.
Amphotericin B
Synergism with amphotericin B (related to enhanced penetration of the _____________)
flucytosine
The adverse effects of ___________ result from metabolism (possibly by intestinal flora) to the toxic antineoplastic compound fluorouracil.
• Bone marrow toxicity (the most common adverse effects)
• anemia, leukopenia, and thrombocytopenia are
flucytosine
• the first oral azole introduced into clinical use.
• less selective for fungal P450 than are the newer azoles. (systemic ketoconazole has fallen out of clinical use)
• Inhibit mammalian CYP450
→ potentiate the toxicities of drugs such as cyclosporine, phenytoin, tolbutamide, and warfarin
Ketoconazole
The antifungal activity of azole drugs results from the reduction of ergosterol synthesis by inhibition of fungal cytochrome P450 enzymes.
azole계, 예로 ketoconazole
inhibits the fungal enzyme squalene epoxidase
→ leading to inhibition of ergosterol biosynthesis
→ also accumulation of the sterol squalene, which is toxic to the organism.
Terbinafine
➢ it is accumulated in newly forming skin where it binds to keratin, protecting the skin from new infection
: Due to the disruption of the mitotic spindle and inhibition of fungal mitosis
➢ Clinical use: the systemic treatment of dermatophytosis
Griseofulvin
_______: block the M2 proton ion channel of the virus particle and inhibit uncoating of the viral RNA within infected host cells, thus preventing its replication.
• They are active against influenza A only.
Amantadine* and Rimantadine
_____________ is a weak antagonist of the NMDA-type glutamate receptor, increases dopamine release, and blocks dopamine reuptake. This makes it a weak therapy for Parkinson’s disease.
Amantadine
____________ interfere with release of progeny influenza virus from infected to new host cells, thus halting the spread of infection within the respiratory tract.
• competitively and reversibly interact with the active enzyme site to inhibit neuraminidase activity.
Oseltamivir/Zanamivir