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1.
Nanoscale ; 16(35): 16485-16499, 2024 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-39135488

RESUMO

Central nervous system tuberculosis (CNS-TB) is a severe form of extra-pulmonary tuberculosis with high mortality and morbidity rates. The standard treatment regimen for CNS-TB parallels that of pulmonary TB, despite the challenge posed by the blood-brain barrier (BBB), which limits the efficacy of first-line anti-TB drugs (ATDs). Nose-to-brain (N2B) drug delivery offers a promising solution for achieving high ATD concentrations directly at infection sites in the brain while bypassing the BBB. This study aimed to develop chitosan nanoparticles encapsulating ATDs, specifically isoniazid (INH) and rifampicin (RIF). These nanoparticles were further processed into micro-sized chitosan nano-aggregates (NA) via spray drying. Both INH-NA and RIF-NA showed strong mucoadhesion and significantly higher permeation rates across RPMI 2650 cells compared to free ATDs. Intranasal administration of these NAs to TB-infected mice for four weeks resulted in a significant reduction of mycobacterial load by approximately ∼2.86 Log 10 CFU compared to the untreated group. This preclinical data highlights the efficacy of intranasal chitosan nano-aggregates in treating CNS-TB, demonstrating high therapeutic potential, and addressing brain inflammation challenges. To our knowledge, this study is the first to show nasal delivery of ATD nano-formulations for CNS-TB management.


Assuntos
Antituberculosos , Quitosana , Isoniazida , Nanopartículas , Rifampina , Tuberculose do Sistema Nervoso Central , Animais , Camundongos , Tuberculose do Sistema Nervoso Central/tratamento farmacológico , Barreira Hematoencefálica , Quitosana/administração & dosagem , Quitosana/química , Nanopartículas/administração & dosagem , Nanopartículas/química , Administração Intranasal , Células Epiteliais/efeitos dos fármacos , Antituberculosos/administração & dosagem , Antituberculosos/química , Camundongos Endogâmicos BALB C , Adesivos/administração & dosagem , Adesivos/química , Mucinas/química , Encéfalo/efeitos dos fármacos , Encéfalo/patologia , Humanos , Linhagem Celular , Isoniazida/administração & dosagem , Rifampina/administração & dosagem , Sistemas de Liberação de Medicamentos
2.
Indian J Hematol Blood Transfus ; 40(2): 335-339, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38708152

RESUMO

To assess the incidence of anti-HLA donor-specific antibodies and the effectiveness of desensitization strategy in children who underwent haploidentical HSCT at our hospital. A retrospective review, management and outcomes of children with positive anti-HLA DSA who underwent haploidentical HSCT at our hospital from 2020 to 2022. Three patients with Thalassemia major were treated with 2 cycles of pretransplant immune suppression (PTIS) comprising Fludarabine and Dexamethasone in addition to desensitization. Five out of the 26 children who underwent haploidentical HSCT had positive anti-HLA DSA. Post desensitization, three out of the 5 children engrafted with sustained full donor chimerism, 1 patient developed primary graft rejection, while 1 patient died. It is feasible to desensitize children with high anti-HLA donor specific antibodies undergoing haploidentical HSCT to improve outcomes.

3.
Indian J Otolaryngol Head Neck Surg ; 76(1): 422-427, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38440557

RESUMO

INTRODUCTION: Head and neck malignancies are responsible for 30% of all cancers in India with a dramatic increase in numbers due to widespread tobacco consumption. This study aims to assess the epidemiological and histopathological spectrum of these tumors. MATERIALS AND METHODS: A large retrospective review of 5469 biopsy-proven patients presenting between 2018 and 2022 with head and neck cancers was done. Tumors were analysed for distribution according to sites of presentations, gender, age and histopathological profiles. RESULTS: With a male-to-female ratio of 4.2:1, men constituted 80.80% of the study population. Mean age of presentation in women was 53.5 years, whereas men presented at an earlier age of 47.2 years. Oral cavity was the commonest site involved (59.7% cases) followed by the oropharynx (23.8% cases). Buccal mucosa was the commonest subsite involved with 1112 cases followed by tongue lesions with 1088 cases. Larynx was responsible for 17.04% of cases. All subsites were more commonly affected in men with the highest Male: Female ratio of 8.29:1 seen in larynx. The lowest ratio of 1.02:1 was seen in lesions of the face and scalp. Squamous cell carcinoma (SCC) was the most common histopathological diagnosis encountered in 88.97% of cases followed by basal cell carcinoma which was seen in 2.10% lesions. CONCLUSION: Oral cavity lesions constitute the bulk of head and neck cancer presentations in India. The disease is more prevalent in men overall and men present at a younger age in comparison to women. SCC is the most prominent histopathology encountered in our study.

4.
3 Biotech ; 14(4): 112, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38510462

RESUMO

Proteins are considered magic molecules due to their enormous applications in the health sector. Over the past few decades, therapeutic proteins have emerged as a promising treatment option for various diseases, particularly cancer, cardiovascular disease, diabetes, and others. The formulation of protein-based therapies is a major area of research, however, a few factors still hinder the large-scale production of these therapeutic products, such as stability, heterogenicity, immunogenicity, high cost of production, etc. This review provides comprehensive information on various sources and production of therapeutic proteins. The review also summarizes the challenges currently faced by scientists while developing protein-based therapeutics, along with possible solutions. It can be concluded that these proteins can be used in combination with small molecular drugs to give synergistic benefits in the future.

5.
Pediatr Blood Cancer ; 70(1): e30024, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-36317422

RESUMO

BACKGROUND: Langerhans cell histiocytosis (LCH) is a rare but important cause of end-stage liver disease in children. Conventional chemotherapeutic agents that are otherwise the standard-of-care in LCH may be counterproductive in patients with hepatic decompensation. Furthermore, the precise role of liver transplantation (LT) in the management of LCH remains unclear. METHODS: Review of a prospectively collected database (January 2014 to December 2020) of children with liver disease was performed. All clinical details of patients with LCH managed at our center were collected and data analyzed. Based on the outcomes, a management algorithm was proposed. RESULTS: Of the eight (five male) patients referred to our unit, six (75%) underwent LT (four and two for compensated and decompensated cirrhosis, respectively). Median age at diagnosis of LCH was 25 (range: 9-48) months. Two patients, who had previously completed LCH-specific chemotherapy, underwent upfront LT for compensated cirrhosis. Other two patients with compensated cirrhosis showed evidence of active disease. They underwent LT following completion of chemotherapy. Two children with decompensated cirrhosis also had evidence of active disease and were started on modified chemotherapy Both of them had progression of liver disease while on chemotherapy. Hence, an urgent LT was performed which was followed by completion of chemotherapy in these patients. On a median follow-up of 30.5 (10.5-50) months, all post-LT patients were alive with stable graft function and showed no disease recurrence. CONCLUSION: We demonstrate that an algorithmic approach, along with newer chemotherapeutic agents, results in excellent outcomes in LCH patients with liver involvement. Larger multicentric studies on this rare disease are, however, needed to validate our findings.


Assuntos
Histiocitose de Células de Langerhans , Transplante de Fígado , Criança , Humanos , Masculino , Lactente , Pré-Escolar , Transplante de Fígado/efeitos adversos , Histiocitose de Células de Langerhans/tratamento farmacológico , Cirrose Hepática/cirurgia , Cirrose Hepática/etiologia , Recidiva , Estudos Retrospectivos
6.
Tuberculosis (Edinb) ; 135: 102224, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35763913

RESUMO

Pathogenic mycobacteria induce and accelerate blood vessel formation driven by extensive inflammation during granuloma formation, which is a central feature of mycobacterial pathogenesis. Tumor necrosis factor-alpha (TNF-α) enhances the expression of vascular endothelial growth factor (VEGF) and glutamic acid-leucine-arginine (ELR+) chemokines, which are potent inducers of vascularization. Most of the reported research work contends that VEGF growth factor induces neovascularization in human tuberculosis (TB) patients, but the evidence is inconclusive. Considerable ambiguity exists concerning the factors responsible for miliary tuberculosis. To identify such factors, we proposed an alternative explanation that could be found in miliary tuberculosis (MTB) cases. We performed a comparative analysis of angiogenic factors TNF-α, VEGF, and angiogenic ELR+ CXC and CC chemokine ligands in extrapulmonary tuberculosis (EPTB) and pulmonary tuberculosis (PTB) patients. To observe the relationship of these factors with the severity of bacterial burden, guinea pigs were infected with Mycobacterium tuberculosis (M.tb) and levels of the angiogenic factors were examined at different time intervals. Expression of these factors also exhibited a significant positive correlation with bacterial burden in other organs like the spleen, liver, and lymph nodes. We demonstrated statistical data on bacterial burden at different time points following the dissemination of infection in guinea pigs. In this study, we observed that there was a stimulated increase in the expression of ELR+ chemokines and VEGF in EPTB patients as compared to PTB patients. Following increased dissemination, the host immune response clears bacteria from the lungs during disease progression in guinea pigs.


Assuntos
Mycobacterium tuberculosis , Tuberculose Miliar , Tuberculose Pulmonar , Proteínas Adaptadoras de Transdução de Sinal , Animais , Moléculas de Adesão Celular , Quimiocinas , Guanilato Quinases , Cobaias , Humanos , Fator de Necrose Tumoral alfa , Fator A de Crescimento do Endotélio Vascular
7.
Cureus ; 14(3): e23592, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35510022

RESUMO

BACKGROUND: Pain relief after surgery continues to be a major medical challenge in clinical practice. Lumbar spine surgery is associated with significant postoperative pain. Providing optimal analgesia locally in the area of surgical wound, with little systemic side-effects, is a favourable option and has become an intrinsic part of multimodal analgesia. We aimed to assess and compare the effectiveness of local infiltration and instillation of bupivacaine for postoperative analgesia in patients undergoing lumbar spine surgery. MATERIALS AND METHODS: Forty-four adult patients of the American Society of Anesthesiologists (ASA) class I and II were randomly assigned into two groups, incorporating 22 patients per group. After the completion of lumbar spine surgery and after hemostasis was achieved, patients in group A received instillation of 20 ml of 0.25% bupivacaine at the surgical wound site and patients in group B received 20 ml of 0.25% bupivacaine infiltration into the paravertebral muscles on either side. Postoperative numerical rating scale (NRS) pain scores at 1, 2, 3, 4, 5, 6, 7, 8, 14, 20, and 24 hours; the time to first analgesic required, total rescue analgesic consumption, and adverse effects were recorded. Statistical analysis was done using IBM SPSS Statistics for Windows, Version 20.0 (Released 2011; IBM Corp, Armonk, New York, United States). RESULTS: Time to the first analgesic requirement was significantly longer in group A (12.39±1.56 hours) compared to the B group (2.48±0.58 hours) (P < 0.001). The amount of rescue analgesia (diclofenac sodium) required was significantly higher in group B (135.00±46.17 milligrams) compared to A (93.75±33.32 milligrams) (P = 0.001). The number of analgesic demands was higher in the infiltration group compared to the instillation group and was observed to be statistically significant. Hemodynamic parameters remained comparable between the groups. CONCLUSION: Local instillation of surgical wound site provided better pain control than infiltration technique and is effective and safe postoperative analgesia in patients undergoing laminectomy surgeries.

8.
Fetal Pediatr Pathol ; 41(6): 1023-1034, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34738861

RESUMO

Background: Primary immunodeficiency (PID) having defects related to lymphocyte cytotoxic pathway or T-cell dysfunction are well known for developing opportunistic infections and Epstein-Barr virus (EBV)-associated diseases. CARMIL2 deficiency is a recently described combined immunodeficiency (CID) disorder characterized by defective CD28-mediated T cell co-stimulation, altered cytoskeletal dynamics, susceptibility to various infections and Epstein Barr Virus smooth muscle tumor (EBV-SMT). Case report: We report a homozygous CARMIL2 pathogenic variant presenting with recurrent infections and EBV associated smooth muscle tumor (SMT) in a child. Conclusion: The present study reports that EBV SMT may occur in a child with CARMIL2 deficiency.


Assuntos
Infecções por Vírus Epstein-Barr , Tumor de Músculo Liso , Criança , Humanos , Herpesvirus Humano 4/genética , Tumor de Músculo Liso/genética , Tumor de Músculo Liso/complicações , Tumor de Músculo Liso/patologia , Infecções por Vírus Epstein-Barr/complicações , Infecções por Vírus Epstein-Barr/patologia
9.
Med Chem Res ; 31(1): 1-25, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34803342

RESUMO

Cancer is the second leading cause of death worldwide responsible for about 10 million deaths per year. To date several approaches have been developed to treat this deadly disease including surgery, chemotherapy, radiation therapy, hormonal therapy, targeted therapy, and synthetic lethality. The targeted therapy refers to targeting only specific proteins or enzymes that are dysregulated in cancer rather than killing all rapidly dividing cells, has gained much attention in the recent past. Kinase inhibition is one of the most successful approaches in targeted therapy. As of 30 March 2021, FDA has approved 65 small molecule protein kinase inhibitors and most of them are for cancer therapy. Interestingly, several kinase inhibitors contain one or more fused heterocycles as part of their structures. Pyrrolo[2,1-f][1,2,4]triazine is one the most interesting fused heterocycle that is an integral part of several kinase inhibitors and nucleoside drugs viz. avapritinib and remdesivir. This review articles focus on the recent advances made in the development of kinase inhibitors containing pyrrolo[2,1-f][1,2,4]triazine scaffold.

10.
Braz. J. Pharm. Sci. (Online) ; 58: e19224, 2022. graf
Artigo em Inglês | LILACS | ID: biblio-1383989

RESUMO

Abstract Ischemic heart disease is the leading cause of death in postmenopausal women. The activity of heart ACE increases whereas the activity of ACE-2 decreases after menopause. The present study was designed to investigate the role of ACE and ACE-2 in the abrogated cardioprotective effect of IPC in OVX rat heart. The heart was isolated from OVX rat and mounted on Langendorff's apparatus for giving intermittent cycles of IPC. The infarct size was estimated using TTC stain, and coronary effluent was analyzed for LDH, CK-MB, and nitrite release. IPC induced cardioprotection was significantly attenuated in the ovariectomized rat heart as compared to the normal rat heart. However, this attenuated cardioprotection was significantly restored by perfusion of DIZE, an ACE-2 activator, and captopril, an ACE inhibitor, alone or in combination noted in terms of decrease in myocardial infarct size, the release of LDH and CK-MB, and also increase in the release of NO as compared to untreated OVX rat heart. Thus, it is suggested that DIZE and captopril, alone or in combination restore the attenuated cardioprotective effect of IPC in OVX rat heart which is due to an increase in ACE-2 activity and decrease in ACE activity after treatment.


Assuntos
Animais , Feminino , Ratos , Ovariectomia/classificação , Isquemia Miocárdica , Coração/fisiopatologia , Infarto/patologia , Infarto do Miocárdio/patologia , Mulheres , Inibidores da Enzima Conversora de Angiotensina/efeitos adversos , Captopril/farmacologia
11.
Indian J Hematol Blood Transfus ; 37(1): 152-156, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33707849

RESUMO

Lymphoproliferative disorders occurs due to uncontrolled proliferation of lymphocytes that causes lymphocytosis, lymphadenopathy, and involvement of extra nodal sites (bone marrow, liver and spleen) and occur primarily due to immune dysfunction. We describe series of cases with non malignant LPD encountered in our practice and their varied clinical presentation, difficulties in diagnosis, underlying etiology, treatment and outcome. Many of these disorders are self limiting, however some are associated with significant morbidity, hence treatment must be tailored based on the underlying immune dysfunction and aggressiveness of the clone.

12.
Indian Pediatr ; 58(3): 246-249, 2021 03 15.
Artigo em Inglês | MEDLINE | ID: mdl-33713060

RESUMO

BACKGROUND: Primary immunodeficiency disorders are genetically heterogeneous immune disorders with a wide range of infectious and non-infectious manifestations. OBJECTIVE: To describe a single-center experience of primary immunodeficiency disorders. DESIGN: Retrospective analysis from January 2015 to January 2020. SETTING: Tertiary care children's hospital. PARTICIPANTS: One hundred and twelve children (<18 years) diagnosed with primary immunodeficiency disorders. OUTCOME MEASURE: Diagnostic spectrum, clinical features, and outcome. RESULTS: The median (IQR) age of the first clinical manifestation and lag time in diagnosis was 10 (27) and 11 (18) months, respectively. Twenty-seven children (24%) were diagnosed during their first presentation. Thirty-six (32%) children had phagocytic disorders, 20 (17.8%) had combined/cellular defects, 18 (16%) had predominant antibody deficiencies and 17 (15%) had disorders of immune dysregulation. Non-infectious manifestations were seen in 54 (48%). Eight children underwent hematopoietic stem cell transplantation, 44 (39%) children were on antimicrobial prophylaxis and supportive therapy, 36 (32%) were lost to follow-up and 24 (21%) children died. CONCLUSION: Congenital defects of phagocyte function, followed by combined/cellular defects are the commonest primary immune deficiencies (PIDs) identified in southern India. Long lag time in diagnosis and high mortality in our cohort emphasizes the need for early diagnosis and early referral.


Assuntos
Síndromes de Imunodeficiência , Doenças da Imunodeficiência Primária , Criança , Hospitais , Humanos , Síndromes de Imunodeficiência/diagnóstico , Síndromes de Imunodeficiência/epidemiologia , Índia/epidemiologia , Lactente , Estudos Retrospectivos , Atenção Terciária à Saúde
13.
Sci Rep ; 10(1): 1966, 2020 02 06.
Artigo em Inglês | MEDLINE | ID: mdl-32029759

RESUMO

The Kyasanur Forest Disease (KFD) has become a major public health problem in the State of Karnataka, India where the disease was first identified and in Tamil Nadu, Maharashtra, Kerala, and Goa covering the Western Ghats region of India. The incidence of positive cases and distribution of the Kyasanur Forest Disease virus (KFDV) in different geographical regions raises the need to understand the evolution and spatiotemporal transmission dynamics. Phylogeography analysis based on 48 whole genomes (46 from this study) and additionally 28 E-gene sequences of KFDV isolated from different regions spanning the period 1957-2017 was thus undertaken. The mean evolutionary rates based the E-gene was marginally higher than that based on the whole genomes. A subgroup of KFDV strains (2006-2017) differing from the early Karnataka strains (1957-1972) by ~2.76% in their whole genomes and representing spread to different geographical areas diverged around 1980. Dispersal from Karnataka to Goa and Maharashtra was indicated. Maharashtra represented a new source for transmission of KFDV since ~2013. Significant evidence of adaptive evolution at site 123 A/T located in the vicinity of the envelope protein dimer interface may have functional implications. The findings indicate the need to curtail the spread of KFDV by surveillance measures and improved vaccination strategies.


Assuntos
Vírus da Encefalite Transmitidos por Carrapatos/genética , Genoma Viral/genética , Haplorrinos/virologia , Doença da Floresta de Kyasanur/epidemiologia , Taxa de Mutação , Carrapatos/virologia , Animais , Surtos de Doenças , Vírus da Encefalite Transmitidos por Carrapatos/isolamento & purificação , Variação Genética , Humanos , Incidência , Índia/epidemiologia , Doença da Floresta de Kyasanur/transmissão , Doença da Floresta de Kyasanur/veterinária , Doença da Floresta de Kyasanur/virologia , Filogenia , Filogeografia , RNA Viral/genética , RNA Viral/isolamento & purificação , Proteínas do Envelope Viral/genética , Sequenciamento Completo do Genoma
14.
J Steroid Biochem Mol Biol ; 199: 105588, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32004705

RESUMO

Multiple myeloma (MM) is a plasma cell malignancy frequently accompanied with skeletal co-morbidity. Vitamin D (1,25(OH)2D) is an important mediator of skeletal homeostasis that mediates its effect by binding to vitamin D receptor (VDR), a steroid family receptor and modulates various downstream pathways. Multiple polymorphisms have been determined in VDR gene that witnessed significant association with cancer development and progression. Therefore, in this maiden study, we recruited 75 newly diagnosed MM patients and 75 control subjects. 25-hydroxy vitamin D (25(OH)D) levels were measured in all recruited study subjects. Further, PCR-RFLP was performed in DNA samples of recruited study subjects. Results demonstrated significantly decreased 25(OH)D levels in MM patients compared to controls. Additionally, decreased 25(OH)D levels in MM patients inversely associated with disease severity. Further, single nucleotide polymorphism (SNP) analysis of VDR gene showed significantly higher risk of MM disease development in Ff + ff, Aa + aa, and Bb + bb genotypes. Additionally, FokI f, ApaI a and BsmI b alleles were significantly associated with MM occurrence. In conclusion, this study provided initial evidences of association between 25(OH)D insufficiency, VDR gene polymorphism and MM development. Thus, we suggest that a study involving assessment of 25(OH)D levels and VDR gene polymorphism in large patients' cohort might substantiate their role in MM development which would further provide impetus to give 25(OH)D supplementation along with conventional chemotherapeutic agents for myeloma treatment in future.


Assuntos
Estudos de Associação Genética , Predisposição Genética para Doença , Mieloma Múltiplo/genética , Receptores de Calcitriol/genética , Adulto , Alelos , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/patologia , Polimorfismo de Nucleotídeo Único/genética , Isoformas de Proteínas/genética , Vitamina D/análogos & derivados , Vitamina D/genética
15.
Ultrason Sonochem ; 49: 79-88, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30057181

RESUMO

An energy efficient and scalable method designed to form stable and transparent water-in-oil (W/O) nanoemulsion can be attained by optimization of process parameters and study of ternary diagram. Application of high energy in addition to the low energy at the optimized conditions have been targeted to make the process energy efficient, since later part is applied to droplets formed at less energy. In the present work, formation of combined energy mixed surfactant nanoemulsion was achieved by combined approach of isothermal low energy followed by ultrasonication that could be used as a fuel in compression ignition engine free from NOx and particulate matter emissions. A mixture of two functional groups (ether and ester) non-ionic surfactants was used at optimized ratio of 0.71/0.29 (Span 80/TX-100; w/w). Optimization of ultrasonicated parameters resulted in 25% amplitude, 0.5 pulse mode factor and 8.5 min of sonication time. A ternary diagram study was performed to recognize the compositions accountable for the formation of transparent, translucent and opaque emulsions in the bounded range of water fraction 0.02 to 0.11 and surfactant fraction 0.10 to 0.20. Surfactant-to-water (ß) ratio found applicable for the production of nano-sized droplets in the range of 2 ≤ ß ≤ 3. A minimum droplet size of 25 ±â€¯1 nm was attained in the present study. An increase in surfactant fraction decreased average droplet size, whereas, increase in water fraction increased average droplet size. Reduction in droplet size was prominently found in the range of energy density from 15.23 J.ml-1 to 40 J.ml-1 thereafter, it decelerated up to 160 J.ml-1. Prediction of average droplet size modeled with energy density fitted well and could be used for scaling up and tuning the droplet size. Resultant nanoemulsion samples displayed kinetic stability whereas long term stability (45 days) assessed using Ostwald ripening model showed stability in the order of ß = 2.0 > ß = 2.5 > ß = 3.0 > ß = 4.0.

16.
Indian J Med Res ; 147(1): 88-96, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29749366

RESUMO

BACKGROUND & OBJECTIVES: There are reports about the susceptibility of Aedes mosquitoes to ZIKV from various countries, however, no such information is available from Indian sub-continent, although, high level of group cross-reactivity of ZIKV with other flaviviruses has been reported. During outbreak situations, many cases of Dengue (DEN) and Chikungunya (CHIK) are reported. In such scenario, vector mosquitoes are likely to get co-infection/secondary-infection with one or other virus. The present study was carried out to determine the susceptibility of Indian strain of Aedes aegypti to Zika virus (ZIKV) strain (MR-766) and the effect of co-infection/super-infection with either dengue virus (serotype-2) (DENV) or chikungunya virus (CHIKV) on ZIKV replication. METHODS: Ae. aegypti mosquitoes used in this study were reared for many generations since 1980 at laboratory colony maintained at the ICMR-National Institute of Virology, Pune, India. Transmissibility of ZIKV from infected mosquitoes to suckling mice was also studied. Mosquitoes were experimentally infected with ZIKV and super-infected with either DENV or CHIKV via membrane-feeding route and incubated for 14 days at 28±2°C and humidity of 85±5 per cent. Replication of these viruses in mosquitoes was confirmed using real-time reverse transcription-polymerase chain reaction and immunofluorescence assay. Twenty infected mosquitoes were allowed to feed upon four suckling CD1 mice for about 30 min. Transmission of the ZIKV by infected mosquitoes to suckling mice was confirmed by the appearance of clinical signs and the presence of viral RNA in different organs. RESULTS: Concomitant infection of mosquitoes with all the three viruses showed simultaneous propagation of all three viruses, confirmed by real time RT-PCR and IFA. Infection of mosquitoes with CHIKV followed by ZIKV showed positivity in individual head squashes (7%) for both viruses using IFA; only 8.3 per cent showed dual positivity with primary infection of ZIKV followed by DENV; 8.3 per cent dual infection positivity was observed when infected with DENV followed by ZIKV; 5 per cent showed dual infection was observed when infected with ZIKV followed by CHIKV. Ae. aegypti was found to be susceptible to ZIKV strain as ZIKV could be detected from the second post-infection day (PID) in infected mosquitoes. Transmission of ZIKV to mice by the bite of infected Ae. aegypti establishes this species as a potential vector. INTERPRETATION & CONCLUSIONS: From super-infection experiments, it was concluded that ZIKV might have a relative advantage in replication dynamics over DENV. Vertical transmission was not observed for ZIKV in experimentally infected mosquitoes (n=920 larvae). Further studies are required to understand the possibility of silently circulating ZIKV in India, which remain non-detected because of lack of surveillance.


Assuntos
Febre de Chikungunya/virologia , Coinfecção/virologia , Dengue/virologia , Infecção por Zika virus/virologia , Animais , Febre de Chikungunya/epidemiologia , Febre de Chikungunya/transmissão , Vírus Chikungunya/patogenicidade , Coinfecção/epidemiologia , Coinfecção/transmissão , Dengue/epidemiologia , Dengue/transmissão , Vírus da Dengue/patogenicidade , Densovirinae , Surtos de Doenças , Humanos , Índia/epidemiologia , Larva/virologia , Mosquitos Vetores/virologia , Replicação Viral/genética , Zika virus/patogenicidade , Infecção por Zika virus/epidemiologia , Infecção por Zika virus/transmissão
17.
Pediatr Dermatol ; 34(6): 732-734, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-29044633

RESUMO

Langerhans cell histiocytosis (LCH) is a multisystem disorder involving various organs. Nail changes in LCH are extremely rare. We present this case report of extensive nail changes in an 18-month-old child with multisystem LCH.


Assuntos
Histiocitose de Células de Langerhans/complicações , Doenças da Unha/etiologia , Unhas/patologia , Diagnóstico Diferencial , Humanos , Lactente , Doenças da Unha/diagnóstico
18.
Indian J Med Res ; 145(1): 90-96, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28574020

RESUMO

BACKGROUND & OBJECTIVES: Bats are recognized as important reservoirs for emerging infectious disease and some unknown viral diseases. Two novel viruses, Malsoor virus (family Bunyaviridae, genus, Phlebovirus) and a novel adenovirus (AdV) (family, Adenoviridae genus, Mastadenovirus), were identified from Rousettus bats in the Maharashtra State of India. This study was done to develop and optimize real time reverse transcription - polymerase chain reaction (RT-PCR) assays for Malsoor virus and real time and nested PCR for adenovirus from Rousettus bats. METHODS: For rapid and accurate screening of Malsoor virus and adenovirus a nested polymerase chain reaction and TaqMan-based real-time PCR were developed. Highly conserved region of nucleoprotein gene of phleboviruses and polymerase gene sequence from the Indian bat AdV isolate polyprotein gene were selected respectively for diagnostic assay development of Malsoor virus and AdV. Sensitivity and specificity of assays were calculated and optimized assays were used to screen bat samples. RESULTS: Molecular diagnostic assays were developed for screening of Malsoor virus and AdV and those were found to be specific. Based on the experiments performed with different parameters, nested PCR was found to be more sensitive than real-time PCR; however, for rapid screening, real-time PCR can be used and further nested PCR can be used for final confirmation or in those laboratories where real-time facility/expertise is not existing. INTERPRETATION & CONCLUSIONS: This study reports the development and optimization of nested RT-PCR and a TaqMan-based real-time PCR for Malsoor virus and AdV. The diagnostic assays can be used for rapid detection of these novel viruses to understand their prevalence among bat population.


Assuntos
Infecções por Adenoviridae/diagnóstico , Adenoviridae/isolamento & purificação , Mastadenovirus/isolamento & purificação , Poliproteínas/isolamento & purificação , Adenoviridae/patogenicidade , Infecções por Adenoviridae/genética , Infecções por Adenoviridae/virologia , Animais , Quirópteros/virologia , Testes Diagnósticos de Rotina , Humanos , Índia , Mastadenovirus/patogenicidade , Poliproteínas/genética
19.
Pediatr Blood Cancer ; 64(3)2017 03.
Artigo em Inglês | MEDLINE | ID: mdl-27781375

RESUMO

BACKGROUND: Advances in chemotherapy, liver resection techniques, and pediatric liver transplantation have vastly improved survival in children with hepatoblastoma (HB). These are best managed by a multidisciplinary team (MDT) in a setting where all treatment options are available. Until recently, this was difficult to achieve in India. METHODS: All children (<16 years) with HB treated in a pediatric liver surgery and transplantation unit between January 2011 and July 2016 were reviewed. Data regarding the clinical presentation, preoperative management, surgical treatment, postoperative course, and outcomes were extracted from a prospectively managed database. RESULTS: Thirty children were treated for HB during the study period. Nine children were PRETEXT 4, 7 were PRETEXT 3, 13 were PRETEXT 2, and 1 was PRETEXT 1 (where PRETEXT is pretreatment extension). All children received a neoadjuvant chemotherapy before surgery followed by an adjuvant chemotherapy. Nineteen children had complete resection, while six underwent primary living donor liver transplantation. There were six mortalities including five children who poorly responded to chemotherapy with progressive tumor extension. At a median follow-up of 30 months, two children who underwent resection and one child who underwent liver transplant had disease recurrence. CONCLUSION: Improved outcomes can be achieved in children with HB even in countries with limited resources when they are managed by MDTs with expertise in pediatric oncology, liver resection, and liver transplantation.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Hepatectomia , Hepatoblastoma/terapia , Neoplasias Hepáticas/terapia , Transplante de Fígado , Terapia Neoadjuvante , Recidiva Local de Neoplasia/terapia , Quimioterapia Adjuvante , Criança , Pré-Escolar , Terapia Combinada , Países em Desenvolvimento , Feminino , Seguimentos , Hepatoblastoma/patologia , Humanos , Índia , Lactente , Neoplasias Hepáticas/patologia , Doadores Vivos , Masculino , Recidiva Local de Neoplasia/patologia , Estadiamento de Neoplasias , Prognóstico , Estudos Prospectivos , Taxa de Sobrevida
20.
Indian J Hematol Blood Transfus ; 32(Suppl 1): 370-1, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27408442

RESUMO

Kaposiform hemangioendothelioma is a rare, highly vascular and aggressive soft tissue tumor frequently associated with Kasabach-Merritt phenomenon, usually seen in early infancy. Early diagnosis by means of MRI and tissue biopsy portends a better outcome. Treatment includes surgical excision when feasible and medical management with steroids, propranolol, vincristine and supportive treatment for coagulopathy. We report a 3 months old female infant who was diagnosed, treated successfully and is now in complete remission.

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