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Ma D, Ojha P, Yu AD, Araujo MS, Luo W, Keefer E, Díaz MM, Wu M, Joiner WJ, Abruzzi KC, Rosbash M. Timeless noncoding DNA contains cell-type preferential enhancers important for proper Drosophila circadian regulation. Proc Natl Acad Sci U S A 2024; 121:e2321338121. [PMID: 38568969 PMCID: PMC11009632 DOI: 10.1073/pnas.2321338121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/05/2024] [Indexed: 04/05/2024] Open
Abstract
To address the contribution of transcriptional regulation to Drosophila clock gene expression and to behavior, we generated a series of CRISPR-mediated deletions within two regions of the circadian gene timeless (tim), an intronic E-box region and an upstream E-box region that are both recognized by the key transcription factor Clock (Clk) and its heterodimeric partner Cycle. The upstream deletions but not an intronic deletion dramatically impact tim expression in fly heads; the biggest upstream deletion reduces peak RNA levels and tim RNA cycling amplitude to about 15% of normal, and there are similar effects on tim protein (TIM). The cycling amplitude of other clock genes is also strongly reduced, in these cases due to increases in trough levels. These data underscore the important contribution of the upstream E-box enhancer region to tim expression and of TIM to clock gene transcriptional repression in fly heads. Surprisingly, tim expression in clock neurons is only modestly affected by the biggest upstream deletion and is similarly affected by a deletion of the intronic E-box region. This distinction between clock neurons and glia is paralleled by a dramatically enhanced accessibility of the intronic enhancer region within clock neurons. This distinctive feature of tim chromatin was revealed by ATAC-seq (assay for transposase-accessible chromatin with sequencing) assays of purified neurons and glia as well as of fly heads. The enhanced cell type-specific accessibility of the intronic enhancer region explains the resilience of clock neuron tim expression and circadian behavior to deletion of the otherwise more prominent upstream tim E-box region.
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Affiliation(s)
- Dingbang Ma
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai201210, China
- Shanghai Key Laboratory of Aging Studies, Shanghai201210, China
| | - Pranav Ojha
- HHMI, Brandeis University, Waltham, MA02453
- Department of Biology, Brandeis University, Waltham, MA02453
| | - Albert D. Yu
- HHMI, Brandeis University, Waltham, MA02453
- Department of Biology, Brandeis University, Waltham, MA02453
| | - Maisa S. Araujo
- Laboratory of Entomology, Fiocruz Rondônia and Programa de Pós-Graduação em Biologia Experimental/Programa Nacional de Pós-Doutorado, Federal University Foundation of Rondônia, Porto Velho76801-974, Brazil
| | - Weifei Luo
- Guangxi Academy of Sciences, Nanning530003, China
| | - Evelyn Keefer
- HHMI, Brandeis University, Waltham, MA02453
- Department of Biology, Brandeis University, Waltham, MA02453
| | - Madelen M. Díaz
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL33136
| | - Meilin Wu
- Department of Pharmacology, University of California, San Diego, La Jolla, CA92093
| | - William J. Joiner
- Department of Pharmacology, University of California, San Diego, La Jolla, CA92093
- Center for Circadian Biology, University of California, San Diego, La Jolla, CA92093
| | - Katharine C. Abruzzi
- HHMI, Brandeis University, Waltham, MA02453
- Department of Biology, Brandeis University, Waltham, MA02453
| | - Michael Rosbash
- HHMI, Brandeis University, Waltham, MA02453
- Department of Biology, Brandeis University, Waltham, MA02453
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Ansari R, Soni G, Ojha P, Aglave V, Barvalia P. Gas geyser syndrome: Preventable emerging toxic encephalopathy in developing countries. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ojha P, Barvalia P, Aglave V. Starry stroke: A lethal yet preventable syndrome. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Aglave V, Ojha P, Jagiasi K, Soni G, Singh R, Barvalia P, Ansari R. Clinical spectrum of Myelin Oligodendrocyte Glycoprotein (MOG) antibody associated CNS demyelination. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ojha P, Aglave V, Jagiasi K, Soni G, Singh R, Ansari R, Barvalia P. Unusual strokes? Think of unusual etiology ! J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Barvalia P, Jagiasi K, Singh R, Ojha P, Soni G, Aglave V. A novel mutation of senetaxin gene in a juvenile autosomal recessive spinocerebellar ataxia. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Barvalia P, Patil S, Jagiasi K, Ojha P, Singh R, Soni G, Aglave V, Kadam N. Hypertrophic pachymeningitis: Is it really idiopathic? J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Aglave V, Ojha P, Ansari R, Barvalia P. A case of clippers with spinal cord presentation. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kadam N, Khadilkar S, Ojha P, Soni G, Patel B. A rare case of extradural arterio-venous malformation presenting as cervical radiculopathy. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Deist T, Dankers F, Ojha P, Marshall S, Janssen T, Faivre-Finn C, Masciocchi C, Valentini V, Wang J, Chen J, Zhang Z, Spezi E, Button M, Nuyttens J, Vernhout R, Van Soest J, Jochems A, Monshouwer R, Bussink J, Price G, Lambin P, Dekker A. OC-0544 Distributed learning on 20 000+ lung cancer patients. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)30964-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Alam K, Shakya R, Ojha P. Reporting Adverse Drug Reactions Among Hospitalized Medical Patients: A Prospective Study From Tertiary Care Hospital in Western Nepal. Nepal J Epidemiol 2014. [DOI: 10.3126/nje.v4i1.10135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background The risk of adverse drug reaction ranges nearly from zero to high level depending upon the drug itself and the patient factor. The process of detection, assessment, monitoring and reporting of adverse drug reaction is necessary to prevent its occurrence in future. Materials and Methods Information related to suspected Adverse Drug Reactions(ADRs) were collected by pharmacists from general medical ward using ADRs reporting form from Manipal Teaching Hospital (MTH)during ward rounds. The details of suspected drug, drug reaction and all related data were documented. Naranjo Algorithm, modified Hartwig and Siegel and modified Shumock and Thornton scale were used for assessment of causality, severity and preventability respectively. All suspected ADRs were reported to National Pharmacovigilance Center and then to Uppsala Monitoring centre through the electronic online data base named Vigiflow. Results Among 1,105 patients, 51 patients experienced ADR (4.61%). Incidents of ADRs were higher with antibiotics (47.06%) and Ceftriaxone was at top of list (15.69 %). Dermatological system (25.49%) and gastrointestinal system (19.61%) were affected more. About 33.33% of suspected drugs were discontinued. About 41.18% of ADRs required medical treatment where antihistaminic (24.32%) and antipruritic (21.62%) were most commonly used to treat ADRs. To sum up, 64.71% of ADRs were probable, 62.75% were mild in nature and 60.78% were probably preventable. Conclusion Finding of the study suggests that ADRs still pose serious health threat among hospitalized patients and as a matter of fact over 60% of them are preventable. Reporting of ADR scan provide effective measures to prevent the occurrence in the future in which the role of pharmacist is vital.DOI: http://dx.doi.org/10.3126/nje.v4i1.10135 Nepal Journal of Epidemiology 2014;4 (1): 330-336
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Palladino MA, Johnson TA, Gupta R, Chapman JL, Ojha P. Members of the Toll-like receptor family of innate immunity pattern-recognition receptors are abundant in the male rat reproductive tract. Biol Reprod 2007; 76:958-64. [PMID: 17314314 DOI: 10.1095/biolreprod.106.059410] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Protecting developing and maturing spermatozoa and reproductive tissues from microbial damage is an emerging aspect of research in reproductive physiology. Bacterial, viral, and yeast infections of the testis and epididymis can hinder maturation and movement of spermatozoa, resulting in impaired fertility. Toll-like receptors (TLRs) are a broad family of innate immunity receptors that play critical roles in detecting and responding to invading pathogens. Objectives of this study were to determine if organs of the rat male reproductive tract express mRNAs for members of the TLR family, to characterize expression patterns for TLRs in different regions of the epididymis, and to determine if TLR adaptor and target proteins are present in the male reproductive tract. Messenger RNA for Tlr1-Tlr9 was abundantly expressed in testis, epididymis, and vas deferens, as determined by RT-PCR, while Tlr10 and Tlr11 were less abundantly expressed. Tlr mRNA expression showed no region-specific patterns in the epididymis. Immunoblot analysis revealed relatively equal levels of protein for TLRs 1, 2, 4, and 6 in testis, all regions of the epididymis and vas deferens, and lower levels of TLRs 3, 5, and 9-11. TLR7 was primarily detected in the testis. The TLR adapter proteins, myeloid differentiation primary response gene 88 and TLR adaptor molecule 1, as well as v-rel reticuloendotheliosis viral oncogene homolog and NFKBIA, were prominent in testis, epididymis, and vas deferens. The abundant expression of a majority of TLR family members together with expression of TLR adaptors and activation targets provides strong evidence that TLRs play important roles in innate immunity of the male reproductive tract.
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Affiliation(s)
- M A Palladino
- Department of Biology, Monmouth University, West Long Branch, NJ 07764, USA.
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Abstract
Saponins extracted from the fruit pericarp of Sapindus mukorosii were tested for their bactericidal/bacteriostatic property against Lactobacillus acidophilus. Nonoxynol-9 was used as a reference compound for the comparison of activity. Lactobacillus colonies were grown on specific medium (Rogosa SL agar) containing different concentrations of saponins and nonoxynol-9 in an atmosphere of 5% CO2/95% air at 37 degrees C for 72 h. The number and size of colonies were recorded at the end of the experiment and compared with controls. Results indicated that nearly 90% of Lactobacillus colonies with minor reduction in size thrived at 0.05% concentration of saponins whereas only 18% of colonies with approximately 75% reduction in size grew in dishes containing 0.05% nonoxynol-9. At higher concentrations of saponins, there was a gradual, dose-dependent reduction in the number and size of colonies and at 2.5% concentration there was an approximately 55% reduction in the number and 60% reduction in the size of surviving colonies. No lactobacillus colonies, however, grew in dishes containing 0.1% and higher concentrations of nonoxynol-9. The studies indicate that Sapindus saponins as compared to nonoxynol-9 are far less toxic to lactobacillus species and therefore saponins containing spermicidal preparations are likely to be more vaginal-friendly than equivalent nonoxynol-9 preparations.
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Affiliation(s)
- P Ojha
- Division of Endocrinology, Central Drug Research Institute, 226 001 Lucknow, India
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Singh UK, Singh S, Ojha P, Kumar R. Spontaneous rupture of umbilical hernia in an infant. Indian Pediatr 2000; 37:341-2. [PMID: 10750087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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Kumar P, Ojha P, Singh UK. Spontaneous perforation of Meckel's diverticulum in a neonate. Indian Pediatr 1998; 35:906-8. [PMID: 10216603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- P Kumar
- New Born and Pediatric Surgery Center, Sri Ram Nursing Home, Kanker Bagh, Patna, India
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Singh UK, Ojha P, Sinha RK, Suman S. Acute segmental enteritis. Indian Pediatr 1998; 35:765-7. [PMID: 10216570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- U K Singh
- Department of Pediatrics, Patna Medical College, India
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Neale TJ, Ullrich R, Ojha P, Poczewski H, Verhoeven AJ, Kerjaschki D. Reactive oxygen species and neutrophil respiratory burst cytochrome b558 are produced by kidney glomerular cells in passive Heymann nephritis. Proc Natl Acad Sci U S A 1993; 90:3645-9. [PMID: 8475113 PMCID: PMC46358 DOI: 10.1073/pnas.90.8.3645] [Citation(s) in RCA: 118] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Reactive oxygen species (ROS) have been implicated in the production of glomerular damage in passive Heymann nephritis (PHN), an experimental form of membranous nephropathy with neutrophil-independent proteinuria. Immunohistochemistry with monoclonal antibodies specific for cytochrome b558 (a major component of the oxidoreductase complex of the respiratory burst in stimulated neutrophilic granulocytes) showed that this enzyme is localized within visceral glomerular epithelial cells (GECs) in a dense, granular pattern in rats with PHN and proteinuria. By immunoelectron-microscopy, the cytochrome was found in membrane vesicles within the GEC and also extracellularly on the GEC membranes facing the glomerular basement membrane (GBM). By immunoblotting, cytochrome b558 was detected in highest concentration in lysates of isolated glomeruli from proteinuric rats. By contrast, only traces were found in normal glomeruli by immunohistochemistry. Depletion of complement abolished the expression of the cytochrome. Using an ultrastructural cerium-H2O2 histochemistry technique, the functional activity of the glomerular ROS-generating system was demonstrated exclusively in proteinuric PHN, where H2O2 was found in highest concentration within the GBM. These results provide evidence that in rats with PHN and proteinuria, the GECs express and externalize respiratory-burst enzymes that generate ROS in a manner similar to neutrophilic granulocytes, which could then lead to glomerular damage.
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Affiliation(s)
- T J Neale
- Section of Ultrastructural Pathology and Cell Biology, University of Vienna, Austria
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