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).
Water Soluble Vitamins B-vitamins are abundant in milk and other feeds. B-vitamins are synthesized by rumen microorganisms, beginning soon after a young animal begins feeding.
Median Sternotomy Approach : The preferred approach these days is through a median sternotomy. Pericardiectoiny proceeds in the same way as done through left thoracotomy, by
Which type Ribosome occurs exclusivley in Mitocondria?
Q. What is membrane? Membrane is any delicate sheet that separates one region from another blocking or permitting completely or selectively the passage of substances. The skin,
Induction of antimicrobial substances Phytoalexins are antimicrobial substances produced by plants in response to pathogen. They accumulate at the site of infection. For exam
Q. What are NADPH and NADP? NADP is the short form of the nicotinamide adenine dinucleotide phosphate cation, a hydrogen acceptor. NADPH is made when NADP binds to one hydrogen
Explain the Metabolic Alterations during Cancer? As we have studied earlier, patients with advanced cancer experience profound anorexia, early satiety, changes in the structure
Isomer : Existence of different compounds having same molecular form but different structural forms.
MENSTRUAL CYCLE - It occurs only in Primates. Start at the age of 13 yrs. upto menopouse. During this period, generally one egg is released every 28 dyas or so alternately f
Explain Administrative dietitian Administrative dietitian play a major role in large-scale meal planning and monitoring the food preparation process by applying the
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