Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 12 de 12
Filtrar
1.
World J Oncol ; 15(3): 348-354, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38751697

RESUMEN

Multiple myeloma (MM), a malignancy involving plasma cells, disproportionately affects older adults with an average age of diagnosis of about 70 years. Oftentimes, the therapies used in the treatment of MM are associated with a risk for immunotoxicity, lowering the ability of the immune system to fight off opportunistic infections. This is an important relationship for clinicians to realize as the incidence of opportunistic infections in myeloma patients is increasing. As an example, we present a case of a patient with MM who subsequently developed a cryptococcal infection. Our paper will highlight the key details of the case as well as shed light on the importance of understanding the immunodeficiencies in this patient population. We highlight important aspects of the current literature related to MM and relate them to the associated case.

2.
Cureus ; 15(11): e49354, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-38143634

RESUMEN

Juvenile monomelic amyotrophy (JMA), also known as Hirayama's disease, is a rare cervical myelopathy that predominantly affects young Asian males. It is characterized by degeneration of anterior horn cells due to compression by the redundant dural sac. This study presents an atypical case of a 23-year-old Indian male who exhibited uncommon symptoms of JMA. The patient displayed progressive weakness and atrophy in the left forearm, including the usually spared brachioradialis muscle. Electrophysiological tests and MRI scans solidified the diagnosis of Hirayama's disease. After wearing a cervical collar for one year, the patient's condition stabilized, reinforcing the diagnosis. Unlike most JMA cases, this instance highlights the involvement of the brachioradialis muscle, underlining the variability in JMA presentations. A precise diagnosis is contingent upon clinical criteria, dynamic MRI, and electrophysiological findings. Recognizing these variations is crucial for early detection and appropriate management of the disease.

3.
J Assoc Physicians India ; 70(4): 11-12, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35443326

RESUMEN

Present work was conducted to study of role of NGAL in diagnosis and staging the severity of diabetic nephropathy in type 2 diabetes mellitus patients to assess serum NGAL, urine albumin levels in diabetic patients with and without apparent nephropathy. MATERIAL: Comparative study conducted in the General Medicine department of SMS Hospital. INCLUSION CRITERIA: Patients of type 2 Diabetes mellitus. EXCLUSION CRITERIA: Patients consuming high protein diet, pregnancy, severe muscular exercises, orthostatic albuminuria, congestive heart failure, urinary tract infections, liver diseases. Patients with type 1 diabetes mellitus. OBSERVATION: The mean age of patient was 51.7 years. Here, HbA1c and NGAL were negatively correlated with each other with Pearson correlation -0.484 (p-value<0.05). In prediabetic patients mean NGAL was 407ng/ml and as HbA1c increases mean NGAL decreases 276.69 ng/ml (P-value <0.0012). As ACR increases mean NGAL increases significantly (P-value<0.05). CONCLUSION: Neutrophil gelatinase-associated lipocalin could be a renal function evaluation marker for patients with renal dysfunction and markers for detection of diabetic nephropathy in patients with type2 diabetes mellitus.


Asunto(s)
Diabetes Mellitus Tipo 1 , Diabetes Mellitus Tipo 2 , Nefropatías Diabéticas , Biomarcadores , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/diagnóstico , Femenino , Hemoglobina Glucada , Humanos , Lipocalina 2/orina , Masculino , Persona de Mediana Edad
4.
J Genet Eng Biotechnol ; 19(1): 65, 2021 May 07.
Artículo en Inglés | MEDLINE | ID: mdl-33961150

RESUMEN

The antineoplastic herb, Catharanthus roseus is a classified high-value low-volume medicinal herb which is in global attention of scientific research for modulation of its monoterpenoid indole alkaloids (MIA) pathway through genetic engineering. These secondary metabolites are generally stored in specific types of structures/compartments due to their cytotoxic nature and designated roles in plant defense response. However, their presence can hinder the genetic engineering process used to develop transgenic plants through de novo morphogenesis and regeneration of plants from cultured cells/tissues and hence, it always remained a critical impediment in transgenic research in C. roseus. The pre-plasmolysis treatment of leaf explants can help to tackle the recalcitrant nature of leaf explant and can support the direct regeneration response by ex-osmosis that minimizes the concentration of alkaloids. Therefore, this study was performed to chase the effect of osmotic conditions on recalcitrant leaves of C. roseus engaged in vitro plant regeneration and hypothesis of alkaloids ex-osmosis is confirmed by HPLC analysis.

5.
Biotechnol Lett ; 42(1): 11-23, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31729591

RESUMEN

Catharanthus roseus synthesizes one of the most structurally, chemically and biologically active phytomolecules monoterpenoids indole alkaloids (MIAs) with having a wide range of pharmaceutical activities. Being the sole source of antineoplastic MIAs vinblastine and vincristine C. roseus has become one of the most valued plant. The low in planta availability of these MIAs and unavailability of alternative chemical synthesis system has enhanced their demand and equally let to the exorbitant market cost. To bridge this gap alternative production systems have been investigated using MIAs metabolic engineering (ME) in the homologous and heterologous systems. The availability of improved recombinant technologies along with genomics and metabolomics tools has opened the door of tremendous new potentials of ME. To encash these potentials of ME for MIAs pathway, efforts were made by expressing constitutive structure biosynthesis enzymes, transporters, and transcription factors of C. roseus MIAs biosynthesis in both homologous and heterologous systems. Here we review the knowledge of C. roseus MIAs pathway metabolic engineering in homologous and heterologous systems, gained in the past 35 years of C. roseus research.


Asunto(s)
Antineoplásicos/metabolismo , Biotecnología/métodos , Catharanthus/metabolismo , Ingeniería Metabólica/métodos , Alcaloides de Triptamina Secologanina/metabolismo , Biotecnología/tendencias , Ingeniería Metabólica/tendencias , Tecnología Farmacéutica/métodos , Tecnología Farmacéutica/tendencias
6.
Protoplasma ; 255(5): 1281-1294, 2018 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-29508069

RESUMEN

Terpenoid indole alkaloid (TIA) biosynthetic pathway of Catharanthus roseus possesses the major attention in current metabolic engineering efforts being the sole source of highly expensive antineoplastic molecules vinblastine and vincristine. The entire TIA pathway is fairly known at biochemical and genetic levels except the pathway steps leading to biosynthesis of catharanthine and tabersonine. To increase the in-planta yield of these antineoplastic metabolites for the pharmaceutical and drug industry, extensive plant tissue culture-based studies were performed to provide alternative production systems. However, the strict spatiotemporal developmental regulation of TIA biosynthesis has restricted the utility of these cultures for large-scale production. Therefore, the present study was performed to enhance the metabolic flux of TIA pathway towards the biosynthesis of vinblastine by overexpressing two upstream TIA pathway genes, tryptophan decarboxylase (CrTDC) and strictosidine synthase (CrSTR), at whole plant levels in C. roseus. Whole plant transgenic of C. roseus was developed using Agrobacterium tumefaciens LBA1119 strain having CrTDC and CrSTR gene cassette. Developed transgenic lines demonstrated up to twofold enhanced total alkaloid production with maximum ninefold increase in vindoline and catharanthine, and fivefold increased vinblastine production. These lines recorded a maximum of 38-fold and 65-fold enhanced transcript levels of CrTDC and CrSTR genes, respectively.


Asunto(s)
Alcaloides/metabolismo , Descarboxilasas de Aminoácido-L-Aromático/metabolismo , Liasas de Carbono-Nitrógeno/metabolismo , Catharanthus/metabolismo , Indoles/metabolismo , Terpenos/metabolismo , Catharanthus/enzimología , Vinblastina/metabolismo
7.
BMJ Case Rep ; 20172017 Jul 13.
Artículo en Inglés | MEDLINE | ID: mdl-28705799

RESUMEN

A 43-year-old male had progressive pleuritic left-sided chest tightness with shortness of breath. He had dental caries and tenderness on palpation of the left lateral chest. Complete blood count showed leucocytosis. CT scan of the chest with pulmonary emboli protocol showed multiple pulmonary nodules and nodular pleural thickening at left posterior lateral pleura. Forty-eight hours post CTPE scan, CT scan of the chest, abdomen and pelvis displayed right lower lobe consolidation and left-sided pleural effusion with superimposed compressive atelectasis. Ceftaroline intravenous was initiated, with CT-guided pigtail chest tube insertion. Pleural fluid later grew group F beta-haemolytic Streptococcus anginosus Patient improved significantly and was discharged 11 days later with intravenous ertapenem. Patients with group F beta-haemolytic streptococci should be managed aggressively with early and accurate diagnosis, antibiotics, drainage and possible surgery.


Asunto(s)
Cefalosporinas/administración & dosificación , Empiema Pleural/metabolismo , Infecciones Estreptocócicas/diagnóstico por imagen , Administración Intravenosa , Adulto , Cefalosporinas/uso terapéutico , Tubos Torácicos , Caries Dental/complicaciones , Empiema Pleural/diagnóstico por imagen , Empiema Pleural/terapia , Humanos , Masculino , Infecciones Estreptocócicas/terapia , Streptococcus anginosus/aislamiento & purificación , Ceftarolina
8.
Ann Palliat Med ; 4(4): 169-75, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26541395

RESUMEN

BACKGROUND: After total laryngectomy for laryngeal cancer, the major determinants of QOL is the patient's voice related quality of life (V-RQOL). The primary aim of this study was to assess the V-RQOL and impact of socioeconomic status over it in Indian population by using two validated scales [voice handicap index (VHI) and V-RQOL questionnaires]. METHODS: Total 104 patients underwent total laryngectomy but 71 were eligible for study. Patients filled the VHI and V-RQOL questionnaires after completion of 1 year of usage of the TEP voice. The socioeconomic status of the patients was calculated according to various domains related to their life and were divided into lower and higher status. RESULTS: A total of 76.1% patients had VHI score between 0 to 30 (minimal voice handicap), 19.7% had score between 31 to 60 (moderate voice handicap) and only 4.2% patients had VHI score more than 61 (serious voice handicap). On V-RQOL scores, 16.9% patients had score between 10 to 15 (excellent), 40.8% patients, between 16 to 20 (very good), 22.5% patients, between 21 and 25 (good voice), 15.5% patients, between 26 and 30 (fair) and only 4.2% patients scored more than 30 with poor quality of voice. Patients with lower socioeconomic group had better V-RQOL than with high socioeconomic group. CONCLUSIONS: VHI and V-RQOL scores in our series were superior to other studies due to major population with lower socioeconomic status and better social support which exists in our society.


Asunto(s)
Laringectomía/efectos adversos , Calidad de Vida , Calidad de la Voz , Anciano , Femenino , Humanos , India , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo , Clase Social , Encuestas y Cuestionarios
9.
ScientificWorldJournal ; 2012: 929650, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22593711

RESUMEN

Twenty-three pharmaceutically important plants, namely, Elaeocarpus spharicus, Rheum emodi, Indigofera tinctoria, Picrorrhiza kurroa, Bergenia ciliata, Lavandula officinalis, Valeriana wallichii, Coleus forskohlii, Gentiana kurroo, Saussurea lappa, Stevia rebaudiana, Acorus calamus, Pyrethrum cinerariaefolium, Aloe vera, Bacopa monnieri, Salvia sclarea, Glycyrrhiza glabra, Swertia cordata, Psoralea corylifolia, Jurinea mollis, Ocimum sanctum, Paris polyphylla, and Papaver somniferum, which are at the verge of being endangered due to their overexploitation and collection from the wild, were successfully established in vitro. Collections were made from the different biodiversity zones of India including Western Himalaya, Northeast Himalaya, Gangetic plain, Western Ghats, Semiarid Zone, and Central Highlands. Aseptic cultures were raised at the morphogenic level of callus, suspension, axillary shoot, multiple shoot, and rooted plants. Synseeds were also produced from highly proliferating shoot cultures of Bacopa monnieri, Glycyrrhiza glabra, Stevia rebaudiana, Valeriana wallichii, Gentiana kurroo, Lavandula officinalis, and Papaver somniferum. In vitro flowering was observed in Papaver somniferum, Psoralea corylifolia, and Ocimum sanctum shoots cultures. Out of 23 plants, 18 plants were successfully hardened under glasshouse conditions.


Asunto(s)
Conservación de los Recursos Naturales/métodos , Especies en Peligro de Extinción , Plantas Medicinales/crecimiento & desarrollo , Técnicas de Cultivo de Tejidos/métodos , Biodiversidad , Ambiente Controlado , Flores/crecimiento & desarrollo , Geografía , Germinación , India , Morfogénesis , Raíces de Plantas/crecimiento & desarrollo , Brotes de la Planta/crecimiento & desarrollo , Plantas Medicinales/clasificación , Semillas/crecimiento & desarrollo , Especificidad de la Especie
10.
Protoplasma ; 249(2): 255-68, 2012 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-21630129

RESUMEN

Catharanthus roseus (The Madagaskar Periwinkle) plant is commercially valued for harbouring more than 130 bioactive terpenoid indole alkaloids (TIAs). Amongst these, two of the leaf-derived bisindole alkaloids-vinblastine and vincristine-are widely used in several anticancer chemotherapies. The great pharmacological values, low in planta occurrence, unavailability of synthetic substitutes and exorbitant market cost of these alkaloids have prompted scientists to understand the basic architecture and regulation of biosynthesis of these TIAs in C. roseus plant and its cultured tissues. The knowledge gathered over a period of 30 years suggests that the TIA biosynthesis is highly regulated by developmental and environmental factors and operates through a complex multi-step enzymatic network. Extensive spatial and temporal cross talking also occurs at inter- and intracellular levels in different plant organs during TIA biogenesis. A close association of indole, methylerythritol phosphate and secoiridoid monoterpenoid pathways and involvement of at least four cell types (epidermis, internal phloem-associated parenchyma, laticifers and idioblasts) and five intracellular compartments (chloroplast, vacuole, nucleus, endoplasmic reticulum and cytosol) have been implicated with this biosynthetic mechanism. Accordingly, the research in this area is primarily advancing today to address and resolve six major issues namely: precise localization and expression of pathway enzymes using modern in situ RNA hybridization tools, mechanisms of intra- and intercellular trafficking of pathway intermediates, cloning and functional validation of genes coding for known or hitherto unknown pathway enzymes, mechanism of global regulation of the pathway by transcription factors, control of relative diversion of metabolite flux at crucial branch points and finally, strategising the metabolic engineering approaches to improve the productivity of the desired TIAs in plant or corresponding cultured tissues. The present literature update has been compiled to provide a brief overview of some of the emerging developments in our current understanding of TIA metabolism in C. roseus.


Asunto(s)
Catharanthus/metabolismo , Alcaloides de Triptamina Secologanina/metabolismo , Regulación de la Expresión Génica de las Plantas/fisiología , Transducción de Señal
11.
J Nat Med ; 65(3-4): 646-50, 2011 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-21544685

RESUMEN

The biotransformation of ß-artemether (1) by cell suspension cultures of Glycyrrhiza glabra and Lavandula officinalis is reported here for the first time. The major biotransformed product appeared as a grayish-blue color spot on thin-layer chromatography (TLC) with transparent crystal-like texture. Based on its infrared (IR) and (1)H nuclear magnetic resonance (NMR) spectra, the product was characterized as a tetrahydrofuran (THF)-acetate derivative (2). The highest conversion efficiencies of 57 and 60% were obtained when 8-9-day-old cell suspensions of G. glabra and L. officinalis were respectively fed with 4-7 mg of compound 1 in 40 ml of medium per culture and the cells were harvested after 2-5 days of incubation. The addition of compound 1 at the beginning of the culture cycle caused severe growth depression in a dose-dependent manner, resulting in poor bioconversion efficiency of ~25% at 2-5 mg/culture dose only.


Asunto(s)
Artemisininas/metabolismo , Artemisininas/farmacología , Glycyrrhiza/efectos de los fármacos , Glycyrrhiza/metabolismo , Lavandula/efectos de los fármacos , Lavandula/metabolismo , Arteméter , Artemisininas/química , Células Cultivadas , Cromatografía en Capa Delgada , Glycyrrhiza/citología , Lavandula/citología , Espectroscopía de Resonancia Magnética , Estructura Molecular
12.
Protoplasma ; 242(1-4): 35-47, 2010 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-20217156

RESUMEN

The invaluable antineoplastic bisindole alkaloids of Catharanthus roseus and their precursor, vindoline, are not produced in cell cultures. The intricacies involved in endogenous (cellular differentiation) and exogenous (elicitation) regulation of their biosynthesis need to be dissected out for favorable exploitation. This study aimed at elucidating the effect of Pythium aphanidermatum homogenate and methyl jasmonate (MeJa) on in vitro cultures (of cv. 'Dhawal') representing increasing level of differentiation (suspension < callus < shoots) in terms of alkaloid accumulation and transcript abundance of strictosidine beta-D: -glucosidase (SGD) and acetyl-CoA: 4-O-deacetylvindoline 4-O-acetyl-transferase (DAT) genes, representing intermediate and late steps, respectively, of terpenoid indole alkaloid biosynthesis. Elicitation of suspension cultures caused transcriptional upregulation of SGD and enhanced the accumulation of total alkaloids but did not produce vindoline as DAT transcripts were always found to be absent in suspension-cultured cells. Vindoline was also not detected in unelicited and MeJa-treated callus but appeared upon elicitation with fungal homogenate for 24 h that coincided with maximal DAT transcription. Transcript levels of both genes increased upon elicitation of callus but remained below levels present in the mature plant leaf. Elicitation caused appearance of vindoline in shoots and increased the transcript abundance of both genes beyond levels observed in the mature plant leaf. Differentiation was essential for expression of DAT but not SGD, and vindoline biosynthetic potential increased with it.


Asunto(s)
Catharanthus/citología , Catharanthus/metabolismo , Diferenciación Celular , Alcaloides de Triptamina Secologanina/metabolismo , Vías Biosintéticas , Catharanthus/genética , Catharanthus/microbiología , Regulación de la Expresión Génica de las Plantas , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Pythium/fisiología , ARN Mensajero/genética , ARN Mensajero/metabolismo , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Técnicas de Cultivo de Tejidos
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA