• Home
  • Raxit J Jariwalla
Raxit J Jariwalla

Raxit J Jariwalla
Independent Researcher

PhD

About

46
Publications
6,294
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,635
Citations

Publications

Publications (46)
Article
Nutrients are known to display pharmacologic activity against viruses and to exert cooperative effects in cells. To study the influence of nutrient cooperation on HIV production in chronically infected T lymphocytes, we evaluated the individual and combined effects of nutrients on HIV-1 reverse transcriptase (RT) released into the culture supernata...
Article
This chapter illustrates the essentiality of nutrition in AIDS, focusing specifically on the role of micronutrients in restoring the immune system leading to delay, deceleration, or reversal of disease progression. Human immunodeficiency virus (HIV) infection and acquired immune deficiency syndrome (AIDS) have become global health crises. Despite t...
Article
Full-text available
The effects of ascorbate (vitamin C) and azidothymidine (AZT) were examined on HIV expression in permanently infected and reporter cell lines. In T-lymphocytic HXB cells, constitutively producing moderate to high levels of virus, ascorbate suppressed HIV production and reduced the yield of infectious virus released into the culture supernatant. AZT...
Article
Influenza remains a major health threat among infectious diseases, affecting one fifth of the world's population. Current vaccines and drugs have limited efficacy and there is an urgent need for effective therapies. Influenza virus A not only infects susceptible (alveolar) cells in the lungs, it also manifests in extrapulmonary areas, which require...
Article
Selenium is an important trace element with anti-cancer properties. In the present study, the apoptosis-inducing effects of organic selenium derivatives, namely methyl-L-selenocysteine and selenomethionine, were evaluated in vitro on human tumour-derived cell lines from breast, liver, colon, brain, skin and a non-tumorigenic line of epithelial orig...
Article
To determine whether supplementation with alpha-lipoic acid (ALA), a glutathione-replenishing disulfide, modulates whole blood total glutathione (GSH + GSSG) levels and improves lymphocyte function in human immunodeficiency virus (HIV)-infected subjects with history of unresponsiveness to highly active antiretroviral treatment (HAART). Randomized,...
Article
Influenza, a long-standing common infection, poses a serious health problem causing significant morbidity and mortality, and imposing substantial economic costs. To date there are no effective antiviral therapies. A unique nutrient mixture (NM), containing lysine, proline, ascorbic acid, green tea extract, N-acetyl cysteine and selenium among other...
Chapter
This book, which contains 99 chapters, focuses on the growing body of knowledge on the role of various dietary plants in reducing disease. Most of the expert reviews define and support the actions of bioflavonoids, antioxidants and similar materials that are part of dietary vegetables, dietary supplements and nutraceuticals. The book's chapters hav...
Chapter
This book, which contains 99 chapters, focuses on the growing body of knowledge on the role of various dietary plants in reducing disease. Most of the expert reviews define and support the actions of bioflavonoids, antioxidants and similar materials that are part of dietary vegetables, dietary supplements and nutraceuticals. The book's chapters hav...
Article
Influenza, one of the oldest and most common infections, poses a serious health problem causing significant morbidity and mortality, and imposing substantial economic costs. The efficacy of current drugs is limited and improved therapies are needed. A unique nutrient mixture (NM), containing ascorbic acid, green tea extract, lysine, proline, N-acet...
Article
Abnormal gene expression is a common observation in cancer cells. Although genetic alterations via somatic mutations or DNA modifications are considered to be the cause of cancer, they do not explain the observed abnormal gene expression of many wild-type genes in cancer. Now, a new theory, called "Microcompetition", identifies a non-genetic-altera...
Article
This paper reviews phytonutrients from rice bran that have shown promising disease-preventing and health-related benefits in experimental research studies. Candidate products studied and under investigation include: inositol and related compounds, inositol hexaphosphate (IP6 or phytate), rice oil, ferulic acid, gamma-oryzanol, plant sterols, tocotr...
Article
IP6, a major dietary source of inositol phosphates, is a physiological antioxidant with potential to form complexes with cations linked to cell proliferation and hypercholesterolemia. Accordingly, we have examined the action of IP6 on dietary modulation of neoplasia and hyperlipidemia in a Fischer rat model (1, 2). Two studies were conducted on the...
Article
Full-text available
Ascorbic acid (ascorbate or vitamin C) has been shown to suppress the induction of HIV in latently infected T lymphocytic cells following stimulation with a tumor promoter (PMA) and inflammatory cytokine (TNF-α). To assess whether this inhibition was mediated via modulation of the cellular transcription factor, NF-κB, we carried out gel shift analy...
Article
Full-text available
It has been known since the early days of ascorbic acid research that the appearance of scurvy, which is caused by deficiency of this vitamin, is associated with decreased resistance to infection (Reid and Briggs, 1953). Over the years, it has become well recognized that ascorbate can bolster the natural defense mechanisms of the host and provide p...
Article
Full-text available
We have recently shown that ascorbic acid (AA) suppresses the production of HIV in a latently infected T-lymphocytic cell line (ACH-2) following stimulation with the tumor promoter, PMA. To evaluate the effect of ascorbic acid on virus activation following treatment with inflammatory cytokine, we tested tumor necrosis factor alpha (TNF-alpha) whose...
Article
Full-text available
We have investigated the molecular basis of the inhibitory effect of ascorbate (vitamin C) on human immunodeficiency virus (HIV) expression in unstimulated chronically infected and reporter cell lines. Comparison of intracellular HIV RNA and protein patterns of ascorbate-treated cells with corresponding patterns of untreated controls, did not show...
Article
The 140-kDa ribonucleotide reductase (RR1) protein of herpes simplex virus type 2 (HSV-2) functions as the large subunit of virus-specified RR1 and exhibits an intrinsic protein kinase (PK) activity at its unique NH2 terminal region. The N-terminal half of RR1 contains the protein and DNA functions of the morphological transforming region III (mtrI...
Article
To elucidate the action of vitamin C on pathogenic human retroviruses, we investigated and compared the effects of noncytoxic concentrations of ascorbic acid (AA), its calcium salt (Ca-ascorbate), and two thiol-based reducing agents [glutathione (GSH) and N-acetyl-L-cysteine (NAC)] against human immunodeficiency virus (HIV)-1 replication in chronic...
Article
Full-text available
The 1.3-kilobase (kb) Pst I DNA fragment C (Pst I-C) of herpes simplex virus type 2 (HSV-2) morphological transforming region III (mtrIII; map unit 0.562-0.570) encodes part of the N-terminal half of the large subunit of ribonucleotide reductase (RR1; amino acid residues 71-502) and induces the neoplastic transformation of immortalized cell lines....
Article
We have studied the action of ascorbate (vitamin C) on human immunodeficiency virus type 1 (HIV-1), the etiological agent clinically associated with AIDS. We report the suppression of virus production and cell fusion in HIV-infected T-lymphocytic cell lines grown in the presence of nontoxic concentrations of ascorbate. In chronically infected cells...
Article
The effects of dietary phytate upon total cholesterol, triglycerides and divalent cation levels in serum of 3-mo-old female Fischer rats were investigated. Elevation of total cholesterol and triglycerides in serum resulting from the administration of 0.6% cholesterol-supplemented diet was accompanied by a 28% decrease in serum copper and a 27% incr...
Article
Full-text available
The terminal fragments (EJ and EM) of the XbaI-E transforming segment of human cytomegalovirus can independently induce the tumorigenic conversion of immortalized cells. To study their interaction, Rat-2 cells were transfected singly or with a combination of cloned EJ and EM DNAs. Large transformed foci were induced at a 10-fold higher frequency by...
Article
Alteration of gene expression in neoplastic cells can be detected by two-dimensional gel electrophoresis. This study reports the altered synthesis of an abundant cellular protein, p29, accompanying tumorigenic transformation of immortalized fibroblasts induced by transfection with oncogenic DNA. Cell lines derived from morphologically transformed f...
Article
Full-text available
To define the morphological transforming region II (mtrII) of human cytomegalovirus (HCMV), a series of subclones of the Xba I/BamHI fragment EM was constructed in vitro and tested for focus-forming activity and tumorigenicity. A 980-base-pair subclone of fragment EM was identified, and its nucleotide sequence revealed three small open reading fram...
Article
A Fischer rat tumor model was used to examine the effects of (i) dietary magnesium supplementation on tumor incidence, rate of tumor growth and latent periods for tumor appearance and death, and (ii) addition of phytate to the magnesium-supplemented diet on the same evaluation endpoints. Fifty, three-month old female Fischer rats were assigned to e...
Article
Experiments were done to determine if cloned transforming sequences from herpes simplex virus type 2 (HSV-2) DNA confer upon transfected Rat-2 cells the capacity to be stimulated in phospholipase and cyclooxygenase activities following 12-O-tetradecanoylphorbol-13-acetate (TPA) treatment. Tumor-derived Rat-2 cells transformed with sub-fragments (Ba...
Article
The transforming (focus forming) activity of defined cloned DNA fragments from human cytomegalovirus Towne and AD169 was carried out in immortalized rodent cells. The frequency of focus formation in NIH 3T3 cells by Towne XbaI fragment E was 80- to 100-fold higher than that observed with Towne XbaI fragments AO, O, C, or carrier DNA alone but was s...
Article
Full-text available
The 7.5-kilobase BamHI E fragment (BamHI-E) of herpes simplex virus type 2 (HSV-2) DNA (map position 0.533-0.583) encodes the 144-kDa subunit of ribonucleotide reductase and induces the neoplastic transformation of immortalized cell lines. To define the minimal transforming region of BamHI-E, a series of subclones were constructed that spanned the...
Article
Full-text available
The transforming potential of the herpes simplex virus type 2 (HSV-2) BamHI fragment E (map position 0.533-0.583) encoding the 140-kDa ribonucleotide reductase was assayed by transfection in established Rat-2 cells. Foci of refractile, morphologically distinguishable cells were induced at lower efficiency and after a longer incubation period as com...
Article
Heteroploid mouse NIH 3T3 fibroblasts and several rat fibroblast strains (Rat-1, Rat-2 and REF-52) are cell lines of special interest in the field of carcinogenesis because of their extensive use as normal cells in transformation assays for putative cancer-causing genes. Exposure of these cells to carcinogenic chemicals or oncogenic DNA produces an...
Article
Full-text available
Diploid Syrian hamster embryo (SHE) cells were passaged after transfection with recombinant plasmids containing herpes simplex virus type 2 (HSV-2) DNA inserts Bgl II focus-forming fragment N, Bgl II transforming fragment C, and EcoRI/HindIII fragment AE. Cultures transfected with salmon DNA or with 0.1-5.0 micrograms of Bgl II fragment N reached c...
Article
Full-text available
Specific DNA fragments from human cytomegalovirus (HCMV) strains Towne and AD169 exhibited homology to myc DNA sequences under hybridization conditions corresponding to a 22-28% base mismatch. In a specific subset of hybridizing HCMV fragments, the homology was restricted to the 5' half of viral v-myc and the 5' half of human c-myc. No hybridizatio...
Article
Specific DNA fragments of human cytomegalovirus strain Towne exhibited sequence homology to the transforming regions of herpes simplex virus type 2 (HSV-2) when examined by nitrocellulose filter hybridization under nonstringent conditions. Cloned Towne Xba I fragments B and C were homologous to both Bgl II transforming fragments N and C of HSV-2 DN...
Article
The addition of 1.5 M guanidine thiocyanate (GuSCN) reactivates inactive human leukocyte interferon. The biological activity of inactivated human fibroblast interferon can be only partially recovered with GuSCN if additional (thermal) energy is supplied.
Article
Transfection of Syrian hamster embryo cells with limit digests of Bgl II-, Hpa I-, or Bgl II/Hpa I-cleaved DNA from herpes simplex virus type 2 (strain S-1) but not with salmon sperm DNA resulted in the appearance of refractile, morphologically altered cells at a frequency of 10(-5)/0.005 microgram of viral DNA within two to four passages. Transfor...
Article
Full-text available
Syrian hamster embryo cells were transformed to a neoplastic phenotype after exposure to herpes simplex virus type 2 (S-1) DNA at concentrations (less than or equal to 0.01 microgram per 60-mm dish) at which infectivity was no longer demonstrable. Transformed cells manifested in vitro phenotypic properties characteristic of the neoplastic state, ex...
Article
Altering the aqueous environment, especially with agents that affect hydrogen bonds, markedly affects the stability of mouse L cell interferon. Low pH stabilizes interferon whereas high pH labilizes it; heavy water further enhances interferon thermostability at pH 2 but not at pH 9. Exposure to the protein denaturants, 4 M-guanidine hydrochloride a...
Article
The degradation of biological activity of virus-induced murine interferon was determined in linear nonisothermal and multiple isothermal tests. The stabilizing effect of pH during heating on interferon in solution was greatest at low pH, such that pH 2 greater than pH 5 greater than pH 7 greater than or equal to pH 9; freeze-dried preparations of i...

Network

Cited By