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Institution

Dr. Hari Singh Gour University

EducationSaugor, Madhya Pradesh, India
About: Dr. Hari Singh Gour University is a education organization based out in Saugor, Madhya Pradesh, India. It is known for research contribution in the topics: Drug delivery & Drug carrier. The organization has 1120 authors who have published 1315 publications receiving 29511 citations. The organization is also known as: Dr Harisingh Gour Vishwavidyalaya & Sagar University.


Papers
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Journal ArticleDOI
TL;DR: The current landscape of the PD-1/PD-L1 mechanistic role in tumor immune evasion and therapeutic outcome for cancer treatment is reviewed and the current progress in clinical trials, combination of drug therapy with immunotherapy, safety, and future of check point inhibitors for multiple types of cancer are reviewed.
Abstract: Several cancers are highly refractory to conventional chemotherapy. The survival of tumors in several cases is assisted by checkpoint immunomodulation to maintain the imbalance between immune surveillance and cancer cell proliferation. Check point antibody inhibitors, such as anti-PD-1/PD-L1, are a novel class of inhibitors that function as a tumor suppressing factor via modulation of immune cell-tumor cell interaction. These checkpoint blockers are rapidly becoming a highly promising cancer therapeutic approach that yields remarkable antitumor responses with limited side effects. In recent times, more than four check point antibody inhibitors have been commercialized for targeting PD-1, PDL-1, and CTLA-4. Despite the huge success and efficacy of the anti-PD therapy response, it is limited to specific types of cancers, which attributes to the insufficient and heterogeneous expression of PD-1 in the tumor microenvironment. Herein, we review the current landscape of the PD-1/PD-L1 mechanistic role in tumor immune evasion and therapeutic outcome for cancer treatment. We also review the current progress in clinical trials, combination of drug therapy with immunotherapy, safety, and future of check point inhibitors for multiple types of cancer.

1,163 citations

Journal ArticleDOI
TL;DR: A summary of the achievements in the field to date of non-ionic surfactant vesicles (niosomes) as immunological adjuvants, anti-cancer/anti-infective drug targeting agents and carriers of anti-inflammatory drugs is presented.

958 citations

Journal Article
TL;DR: Improved drug delivery systems are required for drugs currently in use to treat localized diseases of the colon and the concept of using pH as a rigger to release a drug in the colon is based on the pH conditions that vary continuously down the gastrointestinal tract.
Abstract: Purpose. Although oral delivery has become a widely accepted route of administration of therapeutic drugs, the gastrointestinal tract presents several formidable barriers to drug delivery. Colonic drug delivery has gained increased importance not just for the delivery of the drugs for the treatment of local diseases associated with the colon but also for its potential for the delivery of proteins and therapeutic peptides. To achieve successful colonic delivery, a drug needs to be protected from absorption and /or the environment of the upper gastrointestinal tract (GIT) and then be abruptly released into the proximal colon, which is considered the optimum site for colon-tar- geted delivery of drugs. Colon targeting is naturally of value for the topical treatment of diseases of colon such as Chron's diseases, ulcerative colitis, colorectal cancer and amebiasis. Peptides, proteins, oligonucleotides and vac- cines pose potential candidature for colon targeted drug delivery. Methods. The various strategies for targeting orally administered drugs to the colon include covalent linkage of a drug with a carrier, coating with pH-sensitive polymers, formulation of timed released systems, exploita- tion of carriers that are degraded specifically by colonic bacteria, bioadhesive systems and osmotic controlled drug delivery systems. Various prodrugs (sulfasalazine, ipsala- zine, balsalazine and olsalazine) have been developed that are aimed to deliver 5-amino salicylic acid (5-ASA) for localized chemotherapy of inflammatory bowl disease (IBD). Microbially degradable polymers especially azo crosslinked polymers have been investigated for use in tar- geting of drugs to colon. Certain plant polysaccharides such as amylose, inulin, pectin and guar gum remains unaf- fected in the presence of gastrointestinal enzymes and pave the way for the formulation of colon targeted drug delivery systems. The concept of using pH as a rigger to release a drug in the colon is based on the pH conditions that vary continuously down the gastrointestinal tract. Times dependent drug delivery systems have been devel- oped that are based on the principle to prevent release of drug until 3-4 h after leaving the stomach. Redox sensitive polymers and bioadhesive systems have also been exploited to deliver the drugs into the colon. Results. The approach that is based on the formation of prodrug involves covalent linkage between drug and carrier. The type of linkage that is formed between drug and carrier would decide the triggering mechanism for the release of drug in colon. The presence of azo reductase enzymes play pivotal role in the release of drug from azo bond prodrugs while glycosidase activity of the colonic microflora is responsible for liberation of drugs from glycosidic pro- drugs. Release of drugs from azo polymer coated dosage forms is supposed to take place after reduction and thus cleavage of the azo bonds by the azoreductase enzymes present in the colonic microflora. Natural polysaccharides have been used as tools to deliver the drugs specifically to the colon. These polysaccharides remain intact in the phys- iological environment of stomach and small intestine but once the dosage form enters into colon, it is acted upon by polysaccharidases, which degrades the polysaccharide and releases the drug into the vicinity of bioenvironment of colon. However, they should be protected while gaining entry into stomach and small intestine due to enormous swelling and hydrophilic properties of polysaccharides. This has been achieved either by chemical crosslinking or by addition of a protective coat. Formulation coated with enteric polymers releases drug when pH move towards alkaline range while as the multicoated formulation passes the stomach, the drug is released after a lag time of 3-5 h that is equivalent to small intestinal transit time. Drug coated with a bioadhesive polymer that selectively provides adhesion to the colonic mucosa may release drug in the colon. Conclusions. Improved drug delivery systems are required for drugs currently in use to treat localized dis- eases of the colon. The advantages of targeting drugs spe- cifically to the diseased colon are reduced incidence of systemic side effects, lower dose of drug, supply of the drug to the biophase only when it is required and mainte- nance of the drug in its intact form as close as possible to the target site.

719 citations

Journal ArticleDOI
TL;DR: Various mechanisms and reports relating to solubility enhancement using dendrimers, including ionic interaction, hydrogen bonding, and hydrophobic interactions are the possible mechanisms by which a d endrimer exerts its solubilizing property.

355 citations


Authors

Showing all 1166 results

NameH-indexPapersCitations
Rajat Gupta126124072881
Sanjay Jain10388146880
Ashwani Kumar6670318099
Narendra K. Jain591549342
Suresh P. Vyas531828479
Sanyog Jain522768843
Prashant Kesharwani492328043
Amit K. Goyal471575749
Rakesh K. Tekade451815927
James P. Stables441466094
Vinod Kumar Dixit361043827
Umesh Gupta34964541
Swarnlata Saraf331614943
Govind P. Agrawal32592909
Vikas Sharma311453720
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202323
202248
2021208
2020129
2019111
201888