Explain polyenes - amphotericin b, Biology

Assignment Help:

Polyenes: amphotericin b

Amphotericin B products are the only polyenes currently available for systemic treatment of fungal infections.  Nystatin, another polyene, is only available topically.  A liposomal formulation of nystatin is in clinical development for treatment of systemic fungal infections containing invasive aspergillosis.

Polyenes act by binding to ergosterol in the fungal cell membrane, leading to loss of membrane integrity and leakage of cell contents. Conventional amphotericin B and the newer lipid-based formulations have the similar spectrum of activity and are active against most patho- genic fungi and some protozoa. Exceptions include Aspergillus ter- reus,  Fusarium spp.,  Pseudallescheria boydii and some strains of Candida lusitaniae. Amphotericin is used for treatment of many fungal disorders including aspergillosis, blastomycosis, candidiasis, coccidioidomycosis, cryptococcosis (containing meningitis), histoplasmosis, paracoccidioidomycosis, sporotrichosis and zygomycosis. It is also used as empiric therapy in febrile neutropenic patients.

 


Related Discussions:- Explain polyenes - amphotericin b

Main prophylactic measures against hookworm disease, Q. What are the main p...

Q. What are the main prophylactic measures against hookworm disease? The major prophylactic measures against hookworm disease are to avoid walking barefoot on soils suspected o

Metabolism of pollen tubes, Metabolism of Pollen Tubes Pollen grains ...

Metabolism of Pollen Tubes Pollen grains contain auxins, and gibberellins which are known to be involved in post- pollination enlargement of the ovary and the development of

Stable atoms have no vacancies in their outer shell, Select all that are tr...

Select all that are true/correct: Stable atoms have no vacancies in their outer shell. Hydrogen is more stable than carbon Helium is more stable than carbon Helium is more stable t

Define altered fat metabolism - nutrition during stress, Define Altered Fat...

Define Altered Fat Metabolism - Nutrition during Stress? Fat is the major fuel oxidized in infected patients. If nutrition support is inadequate, the peripheral fat stores are

All or None Response, All or None Response A very weak stimulus does n...

All or None Response A very weak stimulus does not result in an action potential. The stimulus must have a certain strength to evoke an excitation. This is the threshold value

Define the major source of vitamin a, Define the major source of vitamin A?...

Define the major source of vitamin A? The major source of vitamin A, as you may be aware, is the carotenoid pigments which are synthesized by plants. Several carotenoid possess

What is cell cycle, What is cell cycle? Cell cycle, or mitotic cycle, i...

What is cell cycle? Cell cycle, or mitotic cycle, is the time period that starts when the cell is formed and finishes when it is divided by mitosis making two daughter cells. T

Duration limit of the qrs, Q. Duration limit of the QRS? The duration o...

Q. Duration limit of the QRS? The duration of the QRS is usually reduced slightly during exercise. Because catecholamines increase conduction velocity in the Purkinje fibers an

How are membranes classified, Concerning their permeability how are membran...

Concerning their permeability how are membranes classified? Membranes can be divided as impermeable, permeable, semipermeable or selectively permeable. An impermeable membra

What is the procedure of normal saline dressing, What is the Procedure of N...

What is the Procedure of Normal saline dressing 1. First collect the supplies near the patient. Place should be clean with good lighting where it is easy to work. Use a newspap

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd