Rana P. Singh

ORCID: 0000-0003-4261-7044
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Research Areas
  • Silymarin and Mushroom Poisoning
  • Berberine and alkaloids research
  • Cancer, Lipids, and Metabolism
  • Selenium in Biological Systems
  • Plant Stress Responses and Tolerance
  • Synthesis and bioactivity of alkaloids
  • Plant Micronutrient Interactions and Effects
  • Polyamine Metabolism and Applications
  • Cancer-related Molecular Pathways
  • Genomics, phytochemicals, and oxidative stress
  • Urological Disorders and Treatments
  • Drug-Induced Hepatotoxicity and Protection
  • Cancer, Hypoxia, and Metabolism
  • Arsenic contamination and mitigation
  • Phytase and its Applications
  • Natural product bioactivities and synthesis
  • Toxin Mechanisms and Immunotoxins
  • Plant nutrient uptake and metabolism
  • Aluminum toxicity and tolerance in plants and animals
  • Agricultural Science and Fertilization
  • Pharmacological Effects of Natural Compounds
  • Cancer Cells and Metastasis
  • Flavonoids in Medical Research
  • Heavy metals in environment
  • Cell death mechanisms and regulation

Jawaharlal Nehru University
2016-2025

University of Colorado Denver
2004-2024

University of Montana
2024

University of Colorado Anschutz Medical Campus
2002-2024

Chandragupt Institute of Management
2023-2024

Alabama State University
2024

Rajendra Institute of Medical Sciences
2019-2024

Paras Hospitals
2024

Sanjay Gandhi Post Graduate Institute of Medical Sciences
2023-2024

Government Medical College
2022-2024

Abstract We isolated a coumarin compound decursin (C19H20O5; molecular weight 328) from Korean angelica (Angelica gigas) root and characterized it by spectroscopy. Here, for the first time, we observed that (25-100 μmol/L) treatment 24 to 96 hours strongly inhibits growth induces death in human prostate carcinoma DU145, PC-3, LNCaP cells. Furthermore, decursinol [where (CH3)2-C=CH-COO- side chain of is substituted with -OH] has much lower effects compared decursin, suggesting possible...

10.1158/0008-5472.1035.65.3 article EN Cancer Research 2005-02-01

The anti-cancer efficacy of grape seed extract (GSE) against prostate cancer (PCA) via its anti-proliferative, pro-apoptotic and anti-angiogenic activities in both cell culture animal models have recently been described by us. GSE is a complex mixture containing gallic acid (GA), catechin (C), epicatechin (EC) several oligomers (procyanidins) C and/or EC, some which are esterified to GA. To determine components most active PCA, an ethyl acetate was separated reverse-phase high-performance...

10.1093/carcin/bgi347 article EN Carcinogenesis 2006-02-10

Roots and leaves of Zea mays L. cv. Ganga Safed‐2 seedlings grown with nutrient solution containing either 10 m M KNO 3 or NH 4 Cl 5 NO had considerably higher glutamate synthase (NADH, EC 1.4.1.14) activity than the corresponding organs from without any nitrogen. The supply inorganic nitrogen for a short time, i.e. h, to roots excised also increased enzyme in these organs. This increase was more pronounced nitrate ammonium When ‐grown were incubated minus medium 24 declined considerably....

10.1111/j.1399-3054.1986.tb05944.x article EN Physiologia Plantarum 1986-03-01

Abstract Herein, for the first time, we investigated in vivo efficacy and associated molecular biomarkers mechanisms of a chemopreventive agent, silibinin, against human colorectal carcinoma (CRC) HT29 xenograft growth. Nude mice were implanted with cells fed vehicle (carboxymethyl cellulose or phosphatidylcholine) 200 mg/kg/d dose silibinin 100 doses silybin-phytosome (5 days per week) 32 days. Silibinin inhibited tumor growth that accounted 48% (P = 0.002) decrease volume 42% 0.012) weight...

10.1158/0008-5472.can-07-6247 article EN Cancer Research 2008-03-13

Abstract Purpose: Accumulating evidences suggest the beneficial effects of fruit-and-vegetable consumption in lowering risk various cancers, including colorectal cancer. Herein, we investigated vitro and vivo anticancer associated mechanisms grape seed extract (GSE), a rich source proanthocyanidins, against Experimental Design: Effects GSE were examined on human cancer HT29 LoVo cells culture for proliferation, cell cycle progression, apoptosis. The effect oral was tumor xenograft growth...

10.1158/1078-0432.ccr-06-1465 article EN Clinical Cancer Research 2006-10-15

The chronic nature of prostate cancer growth and progression leading to metastasis provides a large window for intervention. Herein, the first time, we investigated effect associated mechanisms silibinin phosphatidylcholine (silybin-phytosome) on established tumors in transgenic adenocarcinoma mouse (TRAMP) model.Twenty-week-old TRAMP male mice having palpable tumor were fed with control or 0.5% 1%, w/w, silybin-phytosome diets 11 weeks then sacrificed.Dietary inhibited (up 60%, P < 0.001)...

10.1158/1078-0432.ccr-08-1309 article EN Clinical Cancer Research 2008-12-01

Silibinin, a flavanone from milk thistle, inhibits the growth of tumors in several rodent models. We examined effects dietary silibinin on growth, progression, and angiogenesis urethane-induced lung mice.A/J mice (15 per group) were injected with urethane (1 mg/g body weight) or saline alone fed normal diets for 2 weeks, after which they containing different doses (0%-1% [wt/wt] silibinin) 18 27 weeks. Immunohistochemistry Western blot analysis used to examine enzymatic markers inflammation,...

10.1093/jnci/djj231 article EN JNCI Journal of the National Cancer Institute 2006-06-20
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