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Llanes A, Cruz G, Morán M, Vega C, Pineda VJ, Ríos M, Penagos H, Suárez JA, Saldaña A, Lleonart R, Restrepo CM. Genomic diversity and genetic variation of Leishmania panamensis within its endemic range. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2022; 103:105342. [PMID: 35878820 DOI: 10.1016/j.meegid.2022.105342] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Species belonging to the Leishmania (Viannia) subgenus are important causative agents of cutaneous and mucocutaneous leishmaniasis in Central and South America. These parasites possess several distinctive biological features that are influenced by their genetics, population structure, and genome instability. To date, several studies have revealed varying degrees of genetic diversity within Leishmania species. Particularly, in species of the L. (Viannia) subgenus, a generalized high intraspecific genetic diversity has been reported, although, conflicting conclusions have been drawn using different molecular techniques. Despite being the most common Leishmania species circulating in Panama and Colombia, few studies have analyzed clinical samples of Leishmania panamensis using whole-genome sequencing, and their restricted number of samples has limited the information they can provide to understand the population structure of L. panamensis. Here, we used next generation sequencing (NGS) to explore the genetic diversity of L. panamensis within its endemic range, analyzing data from 43 isolates of Colombian and Panamanian origin. Our results show the occurrence of three well-defined geographically correlated groups, and suggests the possible occurrence of additional phylogeographic groups. Furthermore, these results support the existence of a mixed mode of reproduction in L. panamensis, with varying frequencies of events of genetic recombination occurring primarily within subpopulations of closely related strains. This study offers important insights into the population genetics and reproduction mode of L. panamensis, paving the way to better understand their population structure and the emergence and maintenance of key eco-epidemiological traits.
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Affiliation(s)
- Alejandro Llanes
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Panama City, Panama, Panama
| | - Génesis Cruz
- Escuela de Biología, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panama City, Panama, Panama
| | - Mitchelle Morán
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Panama City, Panama, Panama
| | - Carlos Vega
- Escuela de Biología, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panama City, Panama, Panama
| | - Vanessa J Pineda
- Instituto Conmemorativo Gorgas de Estudios de la Salud (ICGES), Panama City, Panama, Panama
| | - Margarita Ríos
- Instituto Conmemorativo Gorgas de Estudios de la Salud (ICGES), Panama City, Panama, Panama
| | - Homero Penagos
- Hospital Regional Dr. Rafael Hernández, Caja de Seguro Social, David, Chiriquí, Panama; Sistema Nacional de Investigación-Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panama City, Panama, Panama
| | - José A Suárez
- Instituto Conmemorativo Gorgas de Estudios de la Salud (ICGES), Panama City, Panama, Panama; Sistema Nacional de Investigación-Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panama City, Panama, Panama
| | - Azael Saldaña
- Instituto Conmemorativo Gorgas de Estudios de la Salud (ICGES), Panama City, Panama, Panama; Sistema Nacional de Investigación-Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panama City, Panama, Panama
| | - Ricardo Lleonart
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Panama City, Panama, Panama; Sistema Nacional de Investigación-Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panama City, Panama, Panama.
| | - Carlos M Restrepo
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Panama City, Panama, Panama; Sistema Nacional de Investigación-Secretaría Nacional de Ciencia, Tecnología e Innovación (SNI-SENACYT), Panama City, Panama, Panama.
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2
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Kumari D, Perveen S, Sharma R, Singh K. Advancement in leishmaniasis diagnosis and therapeutics: An update. Eur J Pharmacol 2021; 910:174436. [PMID: 34428435 DOI: 10.1016/j.ejphar.2021.174436] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/10/2021] [Accepted: 08/16/2021] [Indexed: 12/11/2022]
Abstract
Leishmaniasis is regarded as a neglected tropical disease by World Health Organization (WHO) and is ranked next to malaria as the deadliest protozoan disease. The primary causative agents of the disease comprise of diverse leishmanial species sharing clinical features ranging from skin abrasions to lethal infection in the visceral organs. As several Leishmania species are involved in infection, the role of accurate diagnosis becomes pivotal in adding new dimensions to anti-leishmanial therapy. Diagnostic methods must be fast, reliable, easy to perform, highly sensitive, and specific to differentiate among similar parasitic diseases. Herein, we present the conventional and recent approaches impended for the disease diagnosis and their sensitivity, specificity, and clinical application in parasite detection. Furthermore, we have also elaborated various new methods to cure leishmaniasis, which include host-directed therapies, drug repurposing, nanotechnology, and combinational therapy. This review addresses novel techniques and innovations in leishmaniasis, which can aid in unraveling new strategies to fight against the deadly infection.
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Affiliation(s)
- Diksha Kumari
- Infectious Diseases Division, CSIR- Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Summaya Perveen
- Infectious Diseases Division, CSIR- Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Rashmi Sharma
- Infectious Diseases Division, CSIR- Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Kuljit Singh
- Infectious Diseases Division, CSIR- Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Patino LH, Muñoz M, Cruz-Saavedra L, Muskus C, Ramírez JD. Genomic Diversification, Structural Plasticity, and Hybridization in Leishmania (Viannia) braziliensis. Front Cell Infect Microbiol 2020; 10:582192. [PMID: 33178631 PMCID: PMC7596589 DOI: 10.3389/fcimb.2020.582192] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 09/28/2020] [Indexed: 01/12/2023] Open
Abstract
Leishmania (Viannia) braziliensis is an important Leishmania species circulating in several Central and South American countries. Among Leishmania species circulating in Brazil, Argentina and Colombia, L. braziliensis has the highest genomic variability. However, genomic variability at the whole genome level has been only studied in Brazilian and Peruvian isolates; to date, no Colombian isolates have been studied. Considering that in Colombia, L. braziliensis is a species with great clinical and therapeutic relevance, as well as the role of genetic variability in the epidemiology of leishmaniasis, we analyzed and evaluated intraspecific genomic variability of L. braziliensis from Colombian and Bolivian isolates and compared them with Brazilian isolates. Twenty-one genomes were analyzed, six from Colombian patients, one from a Bolivian patient, and 14 Brazilian isolates downloaded from public databases. The results obtained of Phylogenomic analysis showed the existence of four well-supported clades, which evidenced intraspecific variability. The whole-genome analysis revealed structural variations in the somy, mainly in the Brazilian genomes (clade 1 and clade 3), low copy number variations, and a moderate number of single-nucleotide polymorphisms (SNPs) in all genomes analyzed. Interestingly, the genomes belonging to clades 2 and 3 from Colombia and Brazil, respectively, were characterized by low heterozygosity (~90% of SNP loci were homozygous) and regions suggestive of loss of heterozygosity (LOH). Additionally, we observed the drastic whole genome loss of heterozygosity and possible hybridization events in one genome belonging to clade 4. Unique/shared SNPs between and within the four clades were identified, revealing the importance of some of them in biological processes of L. braziliensis. Our analyses demonstrate high genomic variability of L. braziliensis in different regions of South America, mainly in Colombia and suggest that this species exhibits striking genomic diversity and a capacity of genomic hybridization; additionally, this is the first study to report whole-genome sequences of Colombian L. braziliensis isolates.
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Affiliation(s)
- Luz H Patino
- Grupo de Investigaciones Microbiológicas-UR (GIMUR), Departamento de Biología, Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Marina Muñoz
- Grupo de Investigaciones Microbiológicas-UR (GIMUR), Departamento de Biología, Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Lissa Cruz-Saavedra
- Grupo de Investigaciones Microbiológicas-UR (GIMUR), Departamento de Biología, Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Carlos Muskus
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Juan David Ramírez
- Grupo de Investigaciones Microbiológicas-UR (GIMUR), Departamento de Biología, Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
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Herrera L, Llanes A, Álvarez J, Degracia K, Restrepo CM, Rivera R, Stephens DE, Dang HT, Larionov OV, Lleonart R, Fernández PL. Antileishmanial activity of a new chloroquine analog in an animal model of Leishmania panamensis infection. INTERNATIONAL JOURNAL FOR PARASITOLOGY-DRUGS AND DRUG RESISTANCE 2020; 14:56-61. [PMID: 32950020 PMCID: PMC7502791 DOI: 10.1016/j.ijpddr.2020.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/14/2020] [Accepted: 08/07/2020] [Indexed: 01/29/2023]
Abstract
Leishmania panamensis is a relevant causative agent of tegumentary leishmaniasis in several Latin American countries. Available antileishmanial drugs have several limitations including relatively high toxicity, difficult administration, high production costs and the emergence of resistance in circulating strains. Therefore, the identification of new molecules as potential therapeutics for leishmaniasis is of great relevance. Here, we developed a murine model of L. panamensis infection and evaluated the effect of a new compound in vivo. After treatment of animals with the compound, we observed a significant reduction of inflammation and parasite load at the inoculation site, in a dose-dependent manner. We observed a reduction in IL-10 production by popliteal lymph nodes cells of infected mice. These results pave the way for future evaluation of this compound as a potential antileishmanial drug or as a suitable scaffold for lead optimization strategies.
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Affiliation(s)
- Lizzi Herrera
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 208, Ciudad del Saber, Apartado 0843-01103, Panama, 0801, Panama; Department of Biotechnology, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh, 522510, India
| | - Alejandro Llanes
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 208, Ciudad del Saber, Apartado 0843-01103, Panama, 0801, Panama; Department of Biotechnology, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh, 522510, India
| | - Jennifer Álvarez
- Escuela de Biología, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá. Panama, 0801, Panama
| | - Kissy Degracia
- Escuela de Biotecnología, Facultad de Ciencias de la Salud Dr. William C. Gorgas, Universidad Latina de Panama, 0801, Panama
| | - Carlos M Restrepo
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 208, Ciudad del Saber, Apartado 0843-01103, Panama, 0801, Panama
| | - Rene Rivera
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 208, Ciudad del Saber, Apartado 0843-01103, Panama, 0801, Panama
| | - David E Stephens
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX, 78249, United States
| | - Hang T Dang
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX, 78249, United States
| | - Oleg V Larionov
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX, 78249, United States
| | - Ricardo Lleonart
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 208, Ciudad del Saber, Apartado 0843-01103, Panama, 0801, Panama
| | - Patricia L Fernández
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 208, Ciudad del Saber, Apartado 0843-01103, Panama, 0801, Panama.
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Thakur S, Joshi J, Kaur S. Leishmaniasis diagnosis: an update on the use of parasitological, immunological and molecular methods. J Parasit Dis 2020; 44:253-272. [PMID: 32419743 PMCID: PMC7223249 DOI: 10.1007/s12639-020-01212-w] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 03/07/2020] [Indexed: 12/24/2022] Open
Abstract
Diagnosis of leishmaniasis has always been a major challenge as its clinical features resemble some other commonly occurring diseases such as tuberculosis, typhoid, and malaria. Reliable laboratory methods become important for differential diagnosis. Demonstration of the parasites in stained preparations of bone marrow and splenic aspirates being risky and invasive is still the gold standard for diagnosis. Serological tests utilizing rapid immunochromatographic formats or rK39 in enzyme linked immune sorbent assay, immunoblotting, direct agglutination test have complications related to high proportions of positive asymptomatic individuals and the inability to diagnose a relapse. Among the molecular techniques, polymerase chain reaction is the most commonly used technique that is successfully implied for diagnosis. This review provides updated information on the recent developments in the field of diagnosis in leishmaniasis, various methods utilized with their advantages and limitations.
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Affiliation(s)
- Shivani Thakur
- Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, 160014 India
| | - Jyoti Joshi
- Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, 160014 India
| | - Sukhbir Kaur
- Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, 160014 India
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Intraspecific Genomic Divergence and Minor Structural Variations in Leishmania (Viannia) panamensis. Genes (Basel) 2020; 11:genes11030252. [PMID: 32120946 PMCID: PMC7140786 DOI: 10.3390/genes11030252] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/07/2020] [Accepted: 02/25/2020] [Indexed: 02/07/2023] Open
Abstract
Leishmania (Viannia) panamensis is one of the most important Leishmania species associated with cutaneous leishmaniasis (CL) in Latin America. Despite its wide geographic distribution and pathogenic potential in humans and animals, the genomic variability of this species is low compared with other Leishmania species circulating in the same geographical area. No studies have reported a detailed analysis of the whole genome of L. panamensis from clinical isolates using DNA high-throughput sequencing to clarify its intraspecific genomic variability or plausible divergence. Therefore, this study aimed to evaluate the intraspecific genomic variability of L. panamensis from Colombia and Panama. A total of 22 genomes were analyzed, 19 from Colombian patients with CL and three genomes from Panama obtained from public databases. The phylogenomic analysis revealed the potential existence of three well-supported clades as evidence of intraspecific divergence. Additionally, the whole-genome analysis showed low structural variations in terms of ploidy, copy number variations, and single-nucleotide polymorphisms (SNPs). SNPs shared among all clades were identified, revealing their importance in different biological processes of L. panamensis. The findings not only expand our knowledge of intraspecific genomic variability of one of the most important Leishmania species in South America but also highlights the possible existence of different clades/lineages/subpopulations across a geographic scale.
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Jaber HT, Hailu A, Pratlong F, Lami P, Bastien P, Jaffe CL. Analysis of genetic polymorphisms and tropism in East African Leishmania donovani by Amplified Fragment Length Polymorphism and kDNA minicircle sequencing. INFECTION GENETICS AND EVOLUTION 2018; 65:80-90. [PMID: 30016714 PMCID: PMC6218636 DOI: 10.1016/j.meegid.2018.07.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 07/06/2018] [Accepted: 07/13/2018] [Indexed: 01/01/2023]
Abstract
Visceral leishmaniasis (VL), the most severe form of leishmaniasis, is caused by Leishmania donovani. In addition to fatal VL, these parasites also cause skin diseases in immune-competent and -suppressed people, post-kala azar dermal leishmaniasis (PKDL) and HIV/VL co-infections, respectively. Genetic polymorphism in 36 Ethiopian and Sudanese L. donovani strains from VL, PKDL and HIV/VL patients was examined using Amplified Fragment Length Polymorphism (AFLP), kDNA minicircle sequencing and Southern blotting. Strains were isolated from different patient tissues: in VL from lymph node, spleen or bone marrow; and in HIV/VL from skin, spleen or bone marrow. When VL and PKDL strains from the same region in Sudan were examined by Southern blotting using a DNA probe to the L. donovani 28S rRNA gene only minor differences were observed. kDNA sequence analysis distributed the strains in no particular order among four clusters (A - D), while AFLP analysis grouped the strains according to geographical origin into two major clades, Southern Ethiopia (SE) and Sudan/Northern Ethiopia (SD/NE). Strains in the latter clade were further divided into subpopulations by zymodeme, geography and year of isolation, but not by clinical symptoms. However, skin isolates showed significantly (p < 0.0001) fewer polymorphic AFLP fragments (average 10 strains = 348.6 ± 8.1) than VL strains (average 26 strains = 383.5 ± 3.8).
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Affiliation(s)
- Hanan T Jaber
- Department of Microbiology and Molecular Genetics, Kuvin Centre for the Study of Infectious and Tropical Diseases, IMRIC, Hebrew University - Hadassah Medical School, Jerusalem, Israel
| | - Asrat Hailu
- School of Medicine, College of Health Sciences, Department of Microbiology, Immunology & Parasitology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Francine Pratlong
- Department of Parasitology-Mycology, National Reference Centre for Leishmanioses, Academic Hospital of Montpellier, France; University of Montpellier, CNRS 5290/IRD 224 "MiVEGEC", Montpellier, France
| | - Patrick Lami
- Department of Parasitology-Mycology, National Reference Centre for Leishmanioses, Academic Hospital of Montpellier, France; University of Montpellier, CNRS 5290/IRD 224 "MiVEGEC", Montpellier, France
| | - Patrick Bastien
- Department of Parasitology-Mycology, National Reference Centre for Leishmanioses, Academic Hospital of Montpellier, France; University of Montpellier, CNRS 5290/IRD 224 "MiVEGEC", Montpellier, France
| | - Charles L Jaffe
- Department of Microbiology and Molecular Genetics, Kuvin Centre for the Study of Infectious and Tropical Diseases, IMRIC, Hebrew University - Hadassah Medical School, Jerusalem, Israel.
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Restrepo CM, Llanes A, Lleonart R. Use of AFLP for the study of eukaryotic pathogens affecting humans. INFECTION GENETICS AND EVOLUTION 2017; 63:360-369. [PMID: 28935612 DOI: 10.1016/j.meegid.2017.09.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 09/13/2017] [Accepted: 09/15/2017] [Indexed: 12/29/2022]
Abstract
Amplified fragment length polymorphism (AFLP) is a genotyping technique based on PCR amplification of specific restriction fragments from a particular genome. The methodology has been extensively used in plant biology to solve a variety of scientific questions, including taxonomy, molecular epidemiology, systematics, population genetics, among many others. The AFLP share advantages and disadvantages with other types of molecular markers, being particularly useful in organisms with no previous DNA sequence knowledge. In eukaryotic pathogens, the technique has not been extensively used, although it has the potential to solve many important issues as it allows the simultaneous examination of hundreds or even thousands of polymorphic sites in the genome of the organism. Here we describe the main applications published on the use of AFLP in eukaryotic pathogens, with emphasis in species of the groups fungi, protozoa and helminths, and discuss the role of this methodology in the context of new techniques derived from the advances of the next generation sequencing.
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Affiliation(s)
- Carlos M Restrepo
- Center for Cellular and Molecular Biology of Diseases, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Ciudad de Panamá, Panama.; Department of Biotechnology, Acharya Nagarjuna University, Guntur, India..
| | - Alejandro Llanes
- Center for Cellular and Molecular Biology of Diseases, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Ciudad de Panamá, Panama.; Department of Biotechnology, Acharya Nagarjuna University, Guntur, India
| | - Ricardo Lleonart
- Center for Cellular and Molecular Biology of Diseases, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Ciudad de Panamá, Panama..
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Herrera L, Stephens DE, D’Avila A, George KG, Arman H, Zhang Y, Perry G, Lleonart R, Larionov OV, Fernández PL. Insights into the structural patterns of the antileishmanial activity of bi- and tricyclic N-heterocycles. Org Biomol Chem 2016; 14:7053-60. [PMID: 27376396 PMCID: PMC4958403 DOI: 10.1039/c6ob01149g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The influence of various structural patterns in a series of novel bi- and tricyclic N-heterocycles on the activity against Leishmania major and Leishmania panamensis has been studied and compounds that are active in the low micromolar region have been identified. Both quinolines and tetrahydrooxazinoindoles (TOI) proved to have significant antileishmanial activities, while substituted indoles were inactive. We have also showed that a chloroquine analogue induces Leishmania killing by modulating macrophage activation.
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Affiliation(s)
- Lizzi Herrera
- Centro de Biología Molecular y Celular de Enfermedades, Instituto de Investigaciones científicas y de alta tecnología (INDICASAT-AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Panamá República de Panamá; Fax: +507 507 0020; Tel: +507 517 0739
- Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh, 522510, India
| | - David E. Stephens
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas, United States of America. Fax: +1 210 458 7428; Tel: +1 210 458 6050
| | - Abigail D’Avila
- Centro de Biología Molecular y Celular de Enfermedades, Instituto de Investigaciones científicas y de alta tecnología (INDICASAT-AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Panamá República de Panamá; Fax: +507 507 0020; Tel: +507 517 0739
| | - Kathryn G. George
- Centro de Biología Molecular y Celular de Enfermedades, Instituto de Investigaciones científicas y de alta tecnología (INDICASAT-AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Panamá República de Panamá; Fax: +507 507 0020; Tel: +507 517 0739
| | - Hadi Arman
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas, United States of America. Fax: +1 210 458 7428; Tel: +1 210 458 6050
| | - Yu Zhang
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas, United States of America. Fax: +1 210 458 7428; Tel: +1 210 458 6050
| | - George Perry
- Department of Biology, The University of Texas at San Antonio, San Antonio, Texas, United States of America
| | - Ricardo Lleonart
- Centro de Biología Molecular y Celular de Enfermedades, Instituto de Investigaciones científicas y de alta tecnología (INDICASAT-AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Panamá República de Panamá; Fax: +507 507 0020; Tel: +507 517 0739
| | - Oleg V. Larionov
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas, United States of America. Fax: +1 210 458 7428; Tel: +1 210 458 6050
| | - Patricia L. Fernández
- Centro de Biología Molecular y Celular de Enfermedades, Instituto de Investigaciones científicas y de alta tecnología (INDICASAT-AIP), Edificio 219, Ciudad del Saber, Apartado 0843-01103, Panamá República de Panamá; Fax: +507 507 0020; Tel: +507 517 0739
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Genome-wide discovery and development of polymorphic microsatellites from Leishmania panamensis parasites circulating in central Panama. Parasit Vectors 2015; 8:527. [PMID: 26459121 PMCID: PMC4603350 DOI: 10.1186/s13071-015-1153-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 10/08/2015] [Indexed: 12/01/2022] Open
Abstract
Background The parasite Leishmania panamensis is the main cause of leishmaniasis in Panama. The disease is largely uncontrolled, with a rising incidence and no appropriate control measures. While microsatellites are considered some of the best genetic markers to study population genetics and molecular epidemiology in these and other parasites, none has been developed for L. panamensis. Findings Here we have developed and tested a new panel of microsatellites for this species, based on high-throughput genome-wide screening. The new set of microsatellites is composed of seventeen loci, mainly spanning trinucleotide or longer motifs. We have evaluated the sensitivity and specificity of the panel based on a sample of 27 isolates obtained from cutaneous leishmaniasis patients from central Panama and also several reference species from both L. (Leishmania) and L. (Viannia) subgenera. The genetic equilibrium was assessed both intra- and inter-loci, while the reproductive mode was evaluated using several tests. The new SSR panel shows high polymorphism and sensitivity, as well as good specificity. The preliminary data described here for L. panamensis suggest extensive departure from Hardy-Weinberg proportions, significant linkage disequilibrium and strong deficit of heterozygotes. Several recombination tests involving multilocus linkage disequilibrium and a phylogenetic approach allowed rejection of frequent recombination in our dataset. Conclusions The genome-wide strategy described here proved to be useful to identify and test new polymorphic SSR loci in Leishmania. The new panel of polymorphic microsatellites is a valuable contribution to the existing molecular markers for the study of genetic structure and other aspects of this important species. Electronic supplementary material The online version of this article (doi:10.1186/s13071-015-1153-2) contains supplementary material, which is available to authorized users.
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Abstract
Leishmania is an infectious protozoan parasite related to African and American trypanosomes. All Leishmania species that are pathogenic to humans can cause dermal disease. When one is confronted with cutaneous leishmaniasis, identification of the causative species is relevant in both clinical and epidemiological studies, case management, and control. This review gives an overview of the currently existing and most used assays for species discrimination, with a critical appraisal of the limitations of each technique. The consensus taxonomy for the genus is outlined, including debatable species designations. Finally, a numerical literature analysis is presented that describes which methods are most used in various countries and regions in the world, and for which purposes.
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Affiliation(s)
- Gert Van der Auwera
- Institute of Tropical Medicine, Department of Biomedical Sciences, Antwerp, Belgium
| | - Jean-Claude Dujardin
- Institute of Tropical Medicine, Department of Biomedical Sciences, Antwerp, Belgium Antwerp University, Department of Biomedical Sciences, Antwerp, Belgium
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Llanes A, Restrepo CM, Del Vecchio G, Anguizola FJ, Lleonart R. The genome of Leishmania panamensis: insights into genomics of the L. (Viannia) subgenus. Sci Rep 2015; 5:8550. [PMID: 25707621 PMCID: PMC4338418 DOI: 10.1038/srep08550] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 01/26/2015] [Indexed: 12/21/2022] Open
Abstract
Kinetoplastid parasites of the Leishmania genus cause several forms of leishmaniasis. Leishmania species pathogenic to human are separated into two subgenera, Leishmania (Leishmania) and L. (Viannia). Species from the Viannia subgenus cause predominantly cutaneous leishmaniasis in Central and South America, occasionally leading to more severe clinical presentations. Although the genomes of several species of Leishmania have been sequenced to date, only one belongs to this rather different subgenus. Here we explore the unique features of the Viannia subgenus by sequencing and analyzing the genome of L. (Viannia) panamensis. Against a background of conservation in gene content and synteny, we found key differences at the genomic level that may explain the occurrence of molecular processes involving nucleic acid manipulation and differential modification of surface glycoconjugates. These differences may in part explain some phenotypic characteristics of the Viannia parasites, including their increased adaptive capacity and enhanced metastatic ability.
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Affiliation(s)
- Alejandro Llanes
- 1] Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Ciudad del Saber, Panamá, Panamá [2] Facultad de Ciencias de la Salud Dr. William C. Gorgas, Universidad Latina de Panamá, Panamá, Panamá [3] Department of Biotechnology, Acharya Nagarjuna University, Guntur, India
| | - Carlos Mario Restrepo
- 1] Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Ciudad del Saber, Panamá, Panamá [2] Department of Biotechnology, Acharya Nagarjuna University, Guntur, India
| | - Gina Del Vecchio
- Facultad de Ciencias de la Salud Dr. William C. Gorgas, Universidad Latina de Panamá, Panamá, Panamá
| | - Franklin José Anguizola
- Facultad de Ciencias de la Salud Dr. William C. Gorgas, Universidad Latina de Panamá, Panamá, Panamá
| | - Ricardo Lleonart
- Centro de Biología Celular y Molecular de Enfermedades, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Ciudad del Saber, Panamá, Panamá
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