Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0023418 (leukemia)
 93,477 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Phenylephrine hydrochloride is a sympathomimetic amine recommended for use as a nasal decongestant and as a mydriatic in ophthalmic applications. In 1977, total U.S. human exposure was estimated at 1.9 x 107 g per year. Phenylephrine hydrochloride was nominated for toxicology and carcinogenesis studies because of a lack of previous long-term studies and because two other sympathomimetic agents (soterenol hydrochloride and mesuprine hydrochloride) produced mesovarial leiomyomas in Sprague-Dawley rats. Toxicology and carcinogenesis studies of USP-grade phenylephrine hydrochloride were conducted by administering diets containing the chemical (99% pure) to F344/N rats and B6C3F1 mice of each sex in studies of 14 days, 12 weeks, and 2 years. In the 14-day studies, no toxic effects were seen in rats or mice fed diets containing up to 2,000 ppm phenylephrine hydrochloride. Doses were increased in the 12-week studies, and deaths of male rats and male mice were observed in groups fed diets containing 10,000 or 20,000 ppm; 1/10 male rats in the 5,000-ppm group died. Other than inflammatory eye lesions (considered secondary to the pharmacologic drying action of the chemical), no specific organ toxicity was noted. Body weights decreased as concentrations of phenylephrine hydrochloride in the diet were increased, and feed consumption was lower in dosed rats. Doses of 0, 620, and 1,250 ppm for rats and 0, 1,250, and 2,500 ppm for mice were selected for the 2-year studies because of the decreased body weight gains in animals given higher doses in the 12-week studies. In the 2-year studies, the approximate amount of phenylephrine hydrochloride consumed per day was 24 mg/kg for low dose rats, 50 mg/kg for high dose rats, 133 mg/kg for low dose mice, and 270 mg/kg for high dose mice. Body weight differences in rats appeared to be dose related, and dosed animals were 3%-15% lighter than controls. Body weights of dosed mice averaged 3%-14% lower than those of controls throughout the 2-year studies. Survival of high dose male rats was greater than that of the controls (control, 30/50; low dose, 33/50; high dose, 42/50); differences in survival were not significant for female rats (42/50; 34/50; 36/50), male mice (35/50; 38/50; 43/50), or female mice (37/50; 34/50; 34/50). Few nonneoplastic lesions were related to phenylephrine hydrochloride dosing in rats or mice. Chronic focal inflammation of the liver was observed at increased incidences in dosed rats (male: 2/50; 13/50; 17/50; female:17/50; 28/50; 35/50). Inflammation of the prostate was seen more frequently in dosed than in control males (10/50; 24/50; 24/50). The incidence of focal cellular change in the liver was increased slightly in high dose male mice (0/50; 2/50; 7/50). In male rats, mononuclear cell leukemia (24/50; 9/50; 5/50) and pheochromocytomas of the adrenal gland (14/49; 11/50; 2/50) occurred with negative trends, and the incidences in the high dose group were lower than those in the controls. No increases in neoplasia were seen in dosed male or female rats or mice. Phenylephrine hydrochloride was not mutagenic in four strains of Salmonella typhimurium (TA100, TA1535, TA1537, and TA98) with or without Aroclor 1254-induced liver S9 from male Sprague-Dawley rats or male Syrian hamsters. The results of mutagenicity studies of phenylephrine hydrochloride were equivocal in the mouse lymphoma L5178Y/TK+/- assay in the absence of S9; it was not tested in the presence of S9. Phenylephrine hydrochloride induced sister-chromatid exchanges (SCEs) but not chromosomal aberrations in Chinese hamster ovary cells. The increase in SCEs was seen only in the absence of metabolic activation with S9. An audit of the experimental data was conducted for the 2-year studies of phenylephrine hydrochloride. No data discrepancies were found that influenced the final interpretations. Under the conditions of these 2-year studies, there was no evidence of carcinogenicity of phenylephrine hydrochloride for male B6C3F1 mice given 1,250 or 2,500 ppm in feed. Survival of high dose male rats was greater than of high dose male rats was greater than that of controls, and the incidences of mononuclear cell leukemia and pheochromocytomas were lower in dosed than in control male rats. Inflammation was observed more frequently in the liver and prostate gland of dosed male rats than in controls. Synonyms: benzene methanol,3-hydroxy-a[(methylamino)methyl]hydrochloride (R)-; (-)-meta-hydroxy-a-[(methylamino)methyl]benzyl alcohol hydrochloride; meta-Synephrine hydrochloride; Neo-synephrinereg.
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PMID:NTP Toxicology and Carcinogenesis Studies of Phenylephrine Hydrochloride (CAS No. 61-76-7) in F344/N Rats and B6C3F1 Mice (Feed Studies). 1274 31

Thalidomide was used to treat acute (n=21) or chronic (n=59) graft-vs-host disease (GVHD) in 80 haematopoietic stem cell allograft recipients after failure to respond to the combination of cyclosporine and corticosteroids with or without other agents. The median time to onset of acute GVHD was 11 days, and thalidomide was started at a median of 48 days post transplant. In addition to corticosteroids and cyclosporine, 13 patients had also received other agents before thalidomide. None of the patients responded and all died of acute GVHD. For chronic GVHD (limited in 13, extensive in 46), thalidomide was started at a median of 385 days post transplant. In addition to corticosteroids and cyclosporine, 34 patients received azathioprine concomitantly. In all patients, thalidomide was added to the ongoing immunosuppressive regimen. The median duration of therapy with thalidomide was 60 days (range, 11-1210; <2 weeks in 11). In total, 13 patients (22%) had complete response, eight (14%) partial response and 38 (64%) no response. Response rates were comparable for limited (39%) and extensive (33%) chronic GVHD. At a median of 53 months, 19 patients are alive, 13 without evidence of chronic GVHD. Survival was significantly better in patients who responded to thalidomide. The principal causes of death were progressive chronic GVHD (n=29) and relapsed leukaemia (n=7). In conclusion, thalidomide has no activity in acute GVHD, but has some activity in chronic GVHD in combination with other agents.
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PMID:Thalidomide after allogeneic haematopoietic stem cell transplantation: activity in chronic but not in acute graft-versus-host disease. 1283 81

Liposomes have showed many advantages in mediating exogenous gene into many cell types in vitro and in vivo. But few data are available concerning gene transfer into hematopoietic cells. In this report, we described two-marker genes (Neo R and Lac Z) co-transferred into hematopoietic cells of human and mouse by using liposome in vitro. The efficiency of gene transfer was tested by X-gal staining and observation of colony formation. The X-gal blue staining rate of transduced cells was about (13.33 +/- 2.68)% in human and about (16.28 +/- 2.95)% in mouse without G418 selection. After G418 selection, the blue cell rate was (46.06 +/- 3.47)% in human and (43.45 +/- 4.1)% in mouse, which were markedly higher than those before selection, suggesting that high-efficiency gene transfer and expression could be attained in primary hematopoietic cells using this easy and harmless transduction protocol. At the same time, this protocol provided experimental data for clinicians to investigate the biology of marrow reconstitution and trace the origin of relapse after autologous bone marrow transplantation for the patients with leukemia.
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PMID:Experiments on gene transferring to primary hematopoietic cells by liposome. 1284 Sep 13

The role of NFkappaB in regulating G1 arrest and maturation induced by the histone deacetylase inhibitor sodium butyrate (NaB) was examined in human myelomonocytic leukemia cells (U937). Cells stably transfected with an IkappaBalpha "super-repressor" lacking phosphorylation sites necessary for proteasomal degradation exhibited diminished IkBa phosphorylation and NF-kappaB DNA binding upon exposure to TNFalpha When exposed to NaB (1 mM; 48 hr) or PMA (5 nM; 24 hr), IkappaBalphaM cells displayed a marked reduction in G1 arrest compared to Neo controls. In each case, this was accompanied by a significant reduction in the percentage of cells expressing the differentiation markers CD11a, CD11b, and CD18. The impairment in NaB-induced maturation in mutant cells was associated with a reciprocal increase in apoptosis. In contrast to impairment in NaB- or PMA-induced NF-kappaB DNA binding, stable expression of the IkappaBalphaM did not modify DNA binding of SP1 or AP2 transcription factors. IkappaBalphaM cells also displayed impairment in NaB- and PMA-mediated induction of p21CIP1 and phosphorylation (inactivation) of p34cdc2, as well as diminished levels of pRb-bound E2F1. Finally, the NF-kappaB inhibitor CAPE antagonized NaB- and PMA-related NF-kappaB DNA binding as well as induction of p21CIP1. Together, these findings suggest that NF-kappaB plays an important functional role in mediating NaB-induced p21CIP1 induction, G1 arrest, and maturation in human myelomonocytic leukemia cells, and that disruption of the NF-kappaB pathway causes cells to engage an alternative, apoptotic program.
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PMID:An intact NF-kappaB pathway is required for histone deacetylase inhibitor-induced G1 arrest and maturation in U937 human myeloid leukemia cells. 1296 41

Several barriers exist to high-efficiency transfer of therapeutic genes into human hematopoietic stem cells (HSCs) using complex oncoretroviral vectors. Human clinical trials to date have used Moloney leukemia virus-based amphotropic and gibbon ape leukemia virus-based envelopes in stable retroviral packaging lines. However, retroviruses pseudotyped with these envelopes have low titers due to the inability to concentrate viral supernatants efficiently by centrifugation without damaging the virus and low transduction efficiencies because of low-level expression of viral target receptors on human HSC. The RD114 envelope from the feline endogenous virus has been shown to transduce human CD34+ cells using transient packaging systems and to be concentrated to high titers by centrifugation. Stable packaging systems have potential advantages over transient systems because greater and more reproducible viral productions can be attained. We have, therefore, constructed and tested a stable RD114-expressing packaging line capable of high-level transduction of human CD34+ cells. Viral particles from this cell line were concentrated up to 100-fold (up to 10(7) viral particles/ml) by ultracentrifugation. Human hematopoietic progenitors from cord blood and sickle cell CD34+ cells were efficiently transduced with a Neo(R)-containing vector after a single exposure to concentrated RD114-pseudotyped virus produced from this cell line. Up to 78% of progenitors from transduced cord blood CD34+ cells and 51% of progenitors from sickle cell CD34+ cells expressed the NeoR gene. We also show transfer of a human beta-globin gene into progenitor cells from CD34+ cells from sickle cell patients with this new RD114 stable packaging system. The results indicate that this packaging line may eventually be useful in human clinical trials of globin gene therapy.
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PMID:A stable murine-based RD114 retroviral packaging line efficiently transduces human hematopoietic cells. 1459 14

Thalidomide, an antiemetic administered in 60th of the 20th century to pregnant women, has become notorious for a range of adverse effects which led to its taking off market. In recent years, its antimyeloma effect was discovered. The aim of the work was to evaluate the incidence of adverse reactions to thalidomide. Its therapeutic effect has not been assessed because of a short period of monitoring and diversity of a sample. The assessed sample consisted of 17 patients with diagnosis of multiple myeloma (10 men and 7 women). An average age of patients was 62.9 +/- 9.4. An average time elapsed from making the diagnosis to starting the treatment with thalidomide was 51.0 +/- 23.7 months. An average length of therapy was 20.1 +/- 9.6 weeks. An average daily maximum therapeutic dose was 138.3 +/- 83.2 mg. Data were collected from outpatient physicians reports, regular laboratory tests, and direct interviews with patients. To classify severity of adverse drug effects (grades 0-4) we used WHO criteria, Cancer and Leukemia Group B criteria, and in cases where certain adverse effects were not included in the above mentioned criteria, we defined our own criteria. The most frequent adverse effects included: leucopenia or neutropenia in 12 (70.6%) patients, altered state of consciousness in 11 (64.7%) patients, obstipation in 10 (58.8%) patients, skin alterations in 9 (52.9%) patients, dizziness in 8 (47.1%) patients, peripheral neuropathy in 7 (41.2%) patients, spasms and spasmodic convulsions in 7 (41.2%) patients, and altered liver tests in 6 (35.3%) patients. From the perspective of necessity to interrupt treatment or reduce the dose the most severe disorders included: peripheral neuropathy in 2 patients (inability to control lower extremities), altered consciousness in 1 patient (protracted somnolence during a day), skin alteration in 1 patient (generalized toxoalergic reaction), leucopenia or neutropenia in 1 patient (1.0 resp < 0.5 x 10(9)/l), altered vision in 1 patient (blurred vision), hypothyroidism in 1 patient, and altered mood in 1 patient (subjective feeling of depression). This work proved thalidomide to be beneficial for the patients with multiple myeloma but it also shoved necessity to intensively monitor its adverse effects and to adjust its doses.
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PMID:[Desirable and undesirable effects of thalidomide in patients with multiple myeloma]. 1468 82

We report a case of secondary acute myeloid leukaemia (AML) following high dose therapy for diffuse large B-cell non-Hodgkin's lymphoma (NHL) who developed meningeal leukaemia. This was refractory to systemic and intrathecal chemotherapy and cranial irradiation. Thalidomide has been reported to have anti-AML activity and appears to cross the blood brain barrier (BBB). We, therefore, attempted a trial of oral Thalidomide and achieved rapid biochemical and cytological remission with a short course. The patient, however, progressed systemically and succumbed to her illness.
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PMID:Thalidomide is highly effective in a patient with meningeal acute myeloid leukaemia. 1506 Dec 17

Angiogenesis is defined as the formation of new capillaries from prexisting blood vessels and plays an important role in the progression of solid tumors and hematologic malignancies. Markers of angiogenesis correlate with clinical characteristics in leukemia and non-Hodgkin's-lymphoma, serving as predictors of poor prognosis. Antiangiogenic effects of chemotherapeutics as well as of novel drugs such as farnesyltransferase inhibitors and tyrosine kinase inhibitors such as Gleevec might contribute to their therapeutic potential. Thalidomide which has antiangiogenic effects and direct cytotoxic effects was found to be effective in multiple myeloma and is considered as an established treatment modality for patients with refractory or relapsed multiple myeloma. Thalidomide has a significant therapeutic effect in myelodysplastic syndrome (MDS) by improving cytopenia and achieving independence of transfusion therapy in a subset of patients. Preliminary data indicate activity of specific VEGF receptor tyrosine kinase (RTK) inhibitors in multiple myeloma (MM) and acute myeloid leukemia (AML). The positive correlation between increased levels of angiogenic cytokines and clinical response to VEGF-RTK inhibitors and thalidomide indicates the relevance of detecting angiogenesis markers to identify best candidate patients for specific approaches. Including antiangiogenic drugs into treatment protocols for hematologic malignancies is an important task for future clinical studies.
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PMID:Antiangiogenic therapy in hematologic malignancies. 1507 37

Thalidomide alone or in combination with steroids has significant activity in multiple myeloma (MM). However, given its teratogenic potential, analogs have been synthesized, retaining the anti-MM activity without these side effects. We examined the anti-MM activity of two thalidomide analogs, CPS11 and CPS49. Direct cytotoxicity of the drugs on myeloma cell lines and patient myeloma cells was examined using thymidine uptake. Tumor cell apoptosis was evaluated by flow cytometry as well as Western blotting for caspase and PARP cleavage. Cellular signaling events were examined by immunoblotting for phosphorylated proteins. Both drugs inhibit proliferation of several MM cell lines sensitive and resistant to conventional therapies. They decrease secretion of IL-6, IGF, and VEGF by marrow stromal cells. Importantly, they inhibit proliferation of MM cells adherent to stromal cells. These drugs induce caspase-mediated apoptosis in MM cell lines, as well as patient MM cells. They inhibit the PI3K/Akt and JAK/STAT (signal transducers and activators of transcription) pathways in MM cells and are antiangiogenic in matrigel-based assays. CPS11 and CPS49 have potent antimyeloma activity and can overcome protective effects of the tumor microenvironment. They have potent antiangiogenic activity and direct effect on bone marrow stroma. These encouraging preclinical data provide the basis for further evaluation in the clinic.
Leukemia 2005 Jul
PMID:Antimyeloma activity of two novel N-substituted and tetraflourinated thalidomide analogs. 1585 15

Human mesenchymal stem cells (hMSCs) were transfected using four retroviral pseudotypes, amphotropic murine leukemia viruses 4070 (MuLV-10A1), a modification of amphotropic pseudotype 4073 (A71G, Q74K, V139M), gibbon ape leukemia virus (GaLV), or feline endogenous virus (RD114) encoding the neomycin resistance (Neo(r)) gene and enhanced green fluorescent protein (eGFP) as genetic markers. It was observed that the MuLV4073 was the most efficient pseudotype for hMSC transfection. The proliferation and differentiation characteristics of eGFP-labelled hMSCs were not significantly different from control hMSCs. G418 selected eGFP-labelled cells were cultured for 3 weeks on two porous, commercially available calcium phosphate bioceramics, a "synthetic hydroxyapatite" and a "deproteinised bone", before implantation into NOD/SCID mice for up to 4 weeks. The eGFP-labelled hMSCs could be readily visualised by their intense green fluorescence both in vitro and in vivo. In "synthetic hydroxyapatite" implants the cells remained in a monolayer, whereas in "deproteinised bone" implants mineralised tissues were detected by histology, scanning electron microscopy and energy dispersive X-ray spectrometry. From the results, it is concluded that the use of eGFP-labelled hMSCs is an effective tool to trace the fate of hMSCs and evaluate the interactions between cells and ceramics both in vitro and in vivo. This is of great value in prospective assessments of these cell populations for use in tissue engineering applications.
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PMID:Efficient characterisation of human cell-bioceramic interactions in vitro and in vivo by using enhanced GFP-labelled mesenchymal stem cells. 1588 1


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