Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Augmentation Therapy:
The functional gene is introduced in addition to the defective gene endogeneous to the cell(s) in this somatic cell gene therapy, i.e. the improved cells consist both the defective (endogeneous) and the normal (introduced) copies of the gene. There are two basic approaches to augmentation therapy. First was used in the first two patients on whom gene therapy was attempted to right the genetic disorder known Severe Combined Immune Deficiency (SCID) syndrome formed by adenosine deaminase (ADA) deficiency. (i) General ADA gene copies were formed by cloning and then (ii) packed into a faulted retrovirus; mostly viral genes were replaced by the ADA gene. (iii) Lymphocytes were linked from the patients, and (IV) the recombinant retroviruses were used to infect the lymphocytes. And (v) the infected cells showing the ADA gene were injected back into the patients. The usual ADA gene was expressed in the patients, and ADA deficiency was partially right, this resulted in an improvement in the patient's immune system. Different kinds of viral vectors have been used to deliver genes into target/stem cells, like lymphocytes, cultured in vitro, bone marrow cells. The target cells themselves are obtained from the concerned patient (more desirable) or from a matched donor. The reservations about security of retroviral vectors is sought to be resolved by developing suicide vectors which cannot replicate after delivery of the gene. The other major problems of this approach are: (i) low frequency of transfect ion of stem cells, (ii) persist ability of the integrated gene, (iii) duration of the gene expression, (iv) lack of suitable regulation of gene expression etc. More recently, interest has targeted on physical methods of gene delivery like Ca2+ phosphate co precipitation, particle gun, electro oration etc. The next approach is the direct injection of DNA into the tissues either as protein complexes (in order to bring about receptor-mediated transfer of DNA into a particular tissue, for example liver) or even as naked DNA into skin or muscle. Interestingly these cells obtain the DNA and show the gene product. Exciting results have been obtained with experimental familial hypercholesterolemia, where LDL receptor stage has been augmented by insertion of the gene as a sialoglycoprotein complex. The problems in this approach relate to the frequency of cells taking up and showing the gene and, more specifically, the duration of expression. The gene delivery methods used for gene therapy may also be used for healing of cancer or AIDS. In the case of cancer, a toxin encoding gene can be delivered into the cancer cells. In the same way, appropriate interleukin genes can be delivered to boost up the body's defence mechanisms (in case of AIDS).
What is Gymnosperms explain its dividions? Gymnosperms are one of the two major groups of plants that bear seeds. The other group, the Angiosperms (flowering plants), differ in
Poxvirus zoonoses Naturally occurring poxvirus infections affect humans and many species of animals and insects. However, for most part, poxviruses other than variola cause self-l
Drawbacks of Lamellar model This model does not explain the elasticity of PM. Although this model says that PM is elastic but it also states that head of lipid molecules is
Starch gelatinization Undamaged starch granules are insoluble in cold water but can imbibe water reversibly i.e. they can swell slightly and then return to their original siz
Which cell count is likely to be elevated when an individual has an allergy or parasitic worms? a) Red blood cells b) Erythrocyte c) Eosinophil (pron: e-o-sin-o-fill)
Circuitry and Priming : The cardio pulmonary bypass circuit consists of oxygenator, tubings, cannulae, cardiotomy reservoirs and cardioplegia attachments. The first step is to pri
However, according to conventional principles of economic analysis it is necessary that a resource is used for it to acquire a value. Consequently economists traditionally value bi
Question 1: Highlight the salient features of eTrials EDC. Explain briefly what is eTrials EDC Describe the salient features of eTrials EDC in comparison with other ED
PENIS - Intromittent organ. Erectile, its apex is penis glanse. Covered by prepuce (part of skin). Main function is insemination (To transfer sperms in vagina in deep).
How Peroxisomes formed Peroxisomes are formed within the cell from the smooth endoplasmic reticulum by a process of budding. Peroxisomes found in the kidney and liver cells are
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd