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Silva-Ramos CR, Matiz-González JM, Gil-Mora J, Martínez Díaz HC, Faccini-Martínez ÁA, Cuervo C, Melby PC, Aguilar PV, Cabada MM, Rodas JD, Hidalgo M. Molecular Characterization of Leptospira Species among Patients with Acute Undifferentiated Febrile Illness from the Municipality of Villeta, Colombia. Trop Med Infect Dis 2024; 9:168. [PMID: 39195606 PMCID: PMC11360529 DOI: 10.3390/tropicalmed9080168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 08/29/2024] Open
Abstract
Leptospira is a bacterial genus that includes several pathogenic species related to leptospirosis. In Colombia, leptospirosis is a mandatorily reported disease, widely distributed across the country. In the Villeta municipality, leptospirosis has been identified as an important cause of febrile illness; however, to date, no studies have been performed to identify the circulating species. A genus-specific qualitative qPCR was performed on DNA extracted from febrile patients' acute-phase whole-blood samples targeting a fragment of the rrs gene. Positive qPCR samples were further amplified for the adk, icdA, LipL32, LipL41, rrs, and secY genes through conventional PCR for sequencing. All high-quality obtained sequences were further assessed through concatenated phylogenetic analysis. A total of 25% (14/56) of febrile patients' acute blood samples were positive for Leptospira spp. High-quality sequences were obtained for only five genes, and analysis through concatenated phylogeny identified that all sequences clustered within the P1/pathogenic clade; some of them formed a robustly supported clade with Leptospira santarosai, and others were closely related with other Leptospira species but exhibited considerable genetic divergence. We describe the presence of pathogenic Leptospira species among febrile patients from the Villeta municipality and identify L. santarosai and other Leptospira species as causative agents of leptospirosis in the region.
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Affiliation(s)
- Carlos Ramiro Silva-Ramos
- Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.M.M.-G.); (J.G.-M.); (H.-C.M.D.); (C.C.)
| | - J. Manuel Matiz-González
- Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.M.M.-G.); (J.G.-M.); (H.-C.M.D.); (C.C.)
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá 110121, Colombia
| | - Juliana Gil-Mora
- Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.M.M.-G.); (J.G.-M.); (H.-C.M.D.); (C.C.)
| | - Heidy-C. Martínez Díaz
- Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.M.M.-G.); (J.G.-M.); (H.-C.M.D.); (C.C.)
| | - Álvaro A. Faccini-Martínez
- Servicio de Infectología, Hospital Militar Central, Bogotá 110110, Colombia;
- Facultad de Medicina, Universidad Militar Nueva Granada, Bogotá 110111, Colombia
- Servicios y Asesorías en Infectología—SAI, Bogotá 110110, Colombia
| | - Claudia Cuervo
- Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.M.M.-G.); (J.G.-M.); (H.-C.M.D.); (C.C.)
| | - Peter C. Melby
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA; (P.C.M.); (M.M.C.)
- Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX 77555, USA;
| | - Patricia V. Aguilar
- Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX 77555, USA;
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Miguel M. Cabada
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA; (P.C.M.); (M.M.C.)
- Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX 77555, USA;
| | - Juan David Rodas
- Grupo de Investigación en Ciencias Veterinarias Centauro, Universidad de Antioquia, Medellín 050010, Colombia;
| | - Marylin Hidalgo
- Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; (J.M.M.-G.); (J.G.-M.); (H.-C.M.D.); (C.C.)
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Barbosa WZ, Magalhães KA, Pussi KF, Lima MSDC, Neitzke-Abreu HC. Feline immunodeficiency virus, feline leukemia virus and Leishmania spp. prevalence in cats from shelters in Mato Grosso do Sul, Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA = BRAZILIAN JOURNAL OF VETERINARY PARASITOLOGY : ORGAO OFICIAL DO COLEGIO BRASILEIRO DE PARASITOLOGIA VETERINARIA 2024; 33:e006324. [PMID: 38958295 PMCID: PMC11253815 DOI: 10.1590/s1984-29612024035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 04/30/2024] [Indexed: 07/04/2024]
Abstract
Diseases such as those caused by feline immunodeficiency virus (FIV) and feline leukemia virus (FeLV) represent health problems for cats. Feline leishmaniasis (FL) has been reported in several cities across the country. The objective was to carry out a clinical-epidemiological and laboratory study of FIV, FeLV and FL in cats from shelters in Dourados, Mato Grosso do Sul, Brazil. Blood samples and swabs from the conjunctival and nasal mucosa were obtained from 75 cats, from four animal shelters. Serology for FIV and FeLV was performed. For Leishmania, polymerase chain reaction (PCR) was performed on blood, conjunctiva and nasal mucosa. In the immunochromatographic serological test, seven cats tested positive for FIV and none for FeLV. No samples was positive in PCR for Leishmania. The study showed that despite the presence of human and canine leishmaniasis in the studied region, Leishmania spp. were absent in the cats studied. To avoid an increase in contagion in shelters, it is essential isolate cats with FIV.
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Affiliation(s)
- Walderson Zuza Barbosa
- Programa de Pós-graduação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados – UFGD, Dourados, MS, Brasil
| | - Karen Araújo Magalhães
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados – UFGD, Dourados, MS, Brasil
| | - Kamily Fagundes Pussi
- Programa de Pós-graduação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados – UFGD, Dourados, MS, Brasil
| | | | - Herintha Coeto Neitzke-Abreu
- Programa de Pós-graduação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados – UFGD, Dourados, MS, Brasil
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados – UFGD, Dourados, MS, Brasil
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Almazán MC, Copa GN, Gil JF, López Quiroga I, Díaz Fernández ME, Uncos A, Hoyos CL, Nasser JR, Barroso PA, Marco JD. Parasitological and molecular search for Leishmania natural infection in phlebotomine sand flies in peri-urban and rural sites of an Argentinean area endemic for tegumentary leishmaniasis. Acta Trop 2021; 222:106064. [PMID: 34302769 DOI: 10.1016/j.actatropica.2021.106064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/12/2021] [Accepted: 07/14/2021] [Indexed: 11/27/2022]
Abstract
Leishmaniases are neglected tropical diseases caused by Leishmania spp. parasites transmitted by the bite of phlebotomine sand flies. In Argentina, the most endemic area of American tegumentary leishmaniasis (ATL) has been Orán department, Province of Salta, where Leishmania (Viannia) braziliensis prevails and Nyssomyia neivai is considered as its vector, although there is no accurate and sufficient information in this regard. The aim of this work was to search for natural infection by Leishmania spp. in sand flies from peri-urban and rural sites with ATL background in Orán department. For this, sand flies were caught at five sites; female sand flies captured with Shannon trap were dissected to microscopically examine their gut contents, while females captured with CDC traps were molecularly analyzed by duplex PCR with two primer pairs to simultaneously amplify kinetoplast DNA (kDNA) and mammalian actin. A total of 1921 females were captured, with Ny. neivai being the most abundant species (89%), followed by Migonemyia migonei (6%) and cortelezzii complex (3%). No natural infection was found in any of them neither by dissection nor by PCR, although the detection limit of kDNA PCR was up to 25 promastigotes. The absence of infected females in peri-urban sites suggest that the transmission did not take place in those environments during the study period. Future searches for natural infection should focus on rural settings to deepen knowledge and elucidate the role of the circulating sand fly species as all have been linked to ATL transmission at other sites.
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Affiliation(s)
- María Cristina Almazán
- Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Argentina; Cátedra de Química Biológica, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - Griselda Noemí Copa
- Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Argentina; Cátedra de Química Biológica, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - José Fernando Gil
- Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Argentina; Cátedra de Química Biológica, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Argentina; Instituto de Investigaciones en Energía No Convencional, CONICET, Salta, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Inés López Quiroga
- Cátedra de Química Biológica, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Argentina
| | | | - Alejandro Uncos
- Instituto de Patología Experimental, CONICET, Salta, Argentina
| | - Carlos Lorenzo Hoyos
- Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Argentina; Instituto de Patología Experimental, CONICET, Salta, Argentina
| | - Julio Rubén Nasser
- Cátedra de Química Biológica, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Argentina
| | - Paola Andrea Barroso
- Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Argentina; Instituto de Patología Experimental, CONICET, Salta, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - Jorge Diego Marco
- Instituto de Investigaciones de Enfermedades Tropicales, Universidad Nacional de Salta, Orán, Argentina; Instituto de Patología Experimental, CONICET, Salta, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
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Betancourt-Ruiz P, Martínez-Díaz HC, Gil-Mora J, Ospina C, Olaya-M LA, Benavides E, Bolaños E, Cuervo C, Blanton L, Hidalgo M. Candidatus Rickettsia senegalensis in Cat Fleas (Siphonaptera: Pulicidae) Collected from Dogs and Cats in Cauca, Colombia. JOURNAL OF MEDICAL ENTOMOLOGY 2020; 57:382-387. [PMID: 31617911 DOI: 10.1093/jme/tjz177] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Indexed: 06/10/2023]
Abstract
Rickettsia typhi and Rickettsia felis (Rickettsiales: Rickettsiaceae) are flea-transmitted pathogens. They are important causes of acute febrile illness throughout the world. We, therefore, sought to identify the rickettsial species present in the fleas of dogs and cats in the department of Cauca, Colombia. In this study, we collected 1,242 fleas from 132 dogs and 43 fleas from 11 cats. All fleas were morphologically identified as Ctenocephalides felis (Bouché) adults and organized in pools for DNA extraction (234 pools from dogs and 11 from cats). The gltA gene from rickettsiae was targeted for screening amplification using conventional PCR. In total, 144 of the 245 pools (58.7%) were positive. The positive samples were then processed for the amplification of the 17kDa antigen gene (144/144; 100% positive) and sca5 gene (140/144; 97.2% positive). In addition, restriction enzyme length polymorphism analysis using NlaIV on the amplified product of the sca5 gene demonstrated several organisms: 21/140 (15%) were R. felis, 118/140 (84.3%) were Rickettsia asemboensis, and 1/140 (0.7%) were Candidatus Rickettsia senegalensis. Subsequent sequencing confirmed Candidatus Rickettsia senegalensis in C. felis collected from dogs the first reported from Colombia.
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Affiliation(s)
- Paola Betancourt-Ruiz
- Grupo de enfermedades infecciosas, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Heidy-C Martínez-Díaz
- Grupo de enfermedades infecciosas, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Juliana Gil-Mora
- Grupo de enfermedades infecciosas, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Catalina Ospina
- Grupo Epidemiología y Salud Pública, Facultad de Ciencias Agropecuarias, Universidad de La Salle, Bogotá, Colombia
| | | | - Efraín Benavides
- Grupo Epidemiología y Salud Pública, Facultad de Ciencias Agropecuarias, Universidad de La Salle, Bogotá, Colombia
| | | | - Claudia Cuervo
- Grupo de enfermedades infecciosas, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Lucas Blanton
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas
| | - Marylin Hidalgo
- Grupo de enfermedades infecciosas, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
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Teruya K, Kusumoto Y, Eto H, Nakamichi N, Shirahata S. Selective Suppression of Cell Growth and Programmed Cell Death-Ligand 1 Expression in HT1080 Fibrosarcoma Cells by Low Molecular Weight Fucoidan Extract. Mar Drugs 2019; 17:E421. [PMID: 31331053 PMCID: PMC6669552 DOI: 10.3390/md17070421] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/12/2019] [Accepted: 07/14/2019] [Indexed: 12/14/2022] Open
Abstract
Low molecular weight fucoidan extract (LMF), prepared by an abalone glycosidase digestion of a crude fucoidan extracted from Cladosiphon novae-caledoniae Kylin, exhibits various biological activities, including anticancer effect. Various cancers express programmed cell death-ligand 1 (PD-L1), which is known to play a significant role in evasion of the host immune surveillance system. PD-L1 is also expressed in many types of normal cells for self-protection. Previous research has revealed that selective inhibition of PD-L1 expressed in cancer cells is critical for successful cancer eradication. In the present study, we analyzed whether LMF could regulate PD-L1 expression in HT1080 fibrosarcoma cells. Our results demonstrated that LMF suppressed PD-L1/PD-L2 expression and the growth of HT1080 cancer cells and had no effect on the growth of normal TIG-1 cells. Thus, LMF differentially regulates PD-L1 expression in normal and cancer cells and could serve as an alternative complementary agent for treatment of cancers with high PD-L1 expression.
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Affiliation(s)
- Kiichiro Teruya
- Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Yoshihiro Kusumoto
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hiroshi Eto
- Daiichi Sangyo Co., Ltd., 6-7-2 Nishitenma, Kita-ku, Osaka 530-0047, Japan
| | - Noboru Nakamichi
- Daiichi Sangyo Co., Ltd., 6-7-2 Nishitenma, Kita-ku, Osaka 530-0047, Japan
| | - Sanetaka Shirahata
- Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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da Costa Lima MS, Hartkopf ACL, de Souza Tsujisaki RA, Oshiro ET, Shapiro JT, de Fatima Cepa Matos M, Cavalheiros Dorval ME. Isolation and molecular characterization of Leishmania infantum in urine from patients with visceral leishmaniasis in Brazil. Acta Trop 2018; 178:248-251. [PMID: 29221850 DOI: 10.1016/j.actatropica.2017.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 11/20/2017] [Accepted: 12/04/2017] [Indexed: 10/18/2022]
Abstract
Leishmania infantum is a protozoan that causes visceral leishmaniasis, a potentially deadly neglected tropical disease. The gold standard for diagnosis has traditionally been detection of amastigotes in bone marrow or spleen aspirates, but this is an invasive procedure that carries the risk of serious complications. Newer PCR techniques are opening new avenues and tissues for testing. Therefore, we tested if amastigotes and DNA from L. infantum could be detected in patient urine. We detected L. infantum DNA in six out of 30 urine samples from patients with visceral leishmaniasis and the promastigotes were isolated in culture from the urine of one patient. These results suggest the feasibility of using urine samples to diagnose visceral leishmaniasis, especially in acute cases or renal infection, providing a valuable tool for doctors and clinicians to use for screening and diagnosis of leishmaniasis in patients.
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Barragan V, Chiriboga J, Miller E, Olivas S, Birdsell D, Hepp C, Hornstra H, Schupp JM, Morales M, Gonzalez M, Reyes S, de la Cruz C, Keim P, Hartskeerl R, Trueba G, Pearson T. High Leptospira Diversity in Animals and Humans Complicates the Search for Common Reservoirs of Human Disease in Rural Ecuador. PLoS Negl Trop Dis 2016; 10:e0004990. [PMID: 27622673 PMCID: PMC5021363 DOI: 10.1371/journal.pntd.0004990] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 08/19/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Leptospirosis is a zoonotic disease responsible for high morbidity around the world, especially in tropical and low income countries. Rats are thought to be the main vector of human leptospirosis in urban settings. However, differences between urban and low-income rural communities provide additional insights into the epidemiology of the disease. METHODOLOGY/PRINCIPAL FINDINGS Our study was conducted in two low-income rural communities near the coast of Ecuador. We detected and characterized infectious leptospira DNA in a wide variety of samples using new real time quantitative PCR assays and amplicon sequencing. We detected infectious leptospira in a high percentage of febrile patients (14.7%). In contrast to previous studies on leptospirosis risk factors, higher positivity was not found in rats (3.0%) but rather in cows (35.8%) and pigs (21.1%). Six leptospira species were identified (L. borgpetersenii, L kirschnerii, L santarosai, L. interrogans, L noguchii, and an intermediate species within the L. licerasiae and L. wolffii clade) and no significant differences in the species of leptospira present in each animal species was detected (χ2 = 9.89, adj.p-value = 0.27). CONCLUSIONS/SIGNIFICANCE A large portion of the world's human population lives in low-income, rural communities, however, there is limited information about leptospirosis transmission dynamics in these settings. In these areas, exposure to peridomestic livestock is particularly common and high prevalence of infectious leptospira in cows and pigs suggest that they may be the most important reservoir for human transmission. Genotyping clinical samples show that multiple species of leptospira are involved in human disease. As these genotypes were also detected in samples from a variety of animals, genotype data must be used in conjunction with epidemiological data to provide evidence of transmission and the importance of different potential leptospirosis reservoirs.
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Affiliation(s)
- Veronica Barragan
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
- Instituto de Microbiologia, Colegio de Ciencias Biologicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
| | - Jorge Chiriboga
- Instituto de Microbiologia, Colegio de Ciencias Biologicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
| | - Erin Miller
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Sonora Olivas
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Dawn Birdsell
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Crystal Hepp
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
- Informatics and Computing Program, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Heidie Hornstra
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
| | | | | | - Manuel Gonzalez
- Instituto Nacional de Salud Pública e Investigación, Guayaquil, Ecuador
| | | | - Carmen de la Cruz
- Instituto Nacional de Salud Pública e Investigación, Guayaquil, Ecuador
| | - Paul Keim
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
- Translational Genomics Research Institute, Flagstaff, Arizona, United States of America
| | - Rudy Hartskeerl
- Biomedical Research, Royal Tropical Institute (KIT), Amsterdam, The Netherlands
| | - Gabriel Trueba
- Instituto de Microbiologia, Colegio de Ciencias Biologicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
| | - Talima Pearson
- The Center for Microbial Genetics and Genomics, Northern Arizona University, Flagstaff, Arizona, United States of America
- * E-mail:
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Cysique LA, Hey-Cunningham WJ, Dermody N, Chan P, Brew BJ, Koelsch KK. Peripheral blood mononuclear cells HIV DNA levels impact intermittently on neurocognition. PLoS One 2015; 10:e0120488. [PMID: 25853424 PMCID: PMC4390276 DOI: 10.1371/journal.pone.0120488] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 01/23/2015] [Indexed: 11/18/2022] Open
Abstract
Objectives To determine the contribution of peripheral blood mononuclear cells’ (PBMCs) HIV DNA levels to HIV-associated dementia (HAD) and non-demented HIV-associated neurocognitive disorders (HAND) in chronically HIV-infected adults with long-term viral suppression on combined antiretroviral treatment (cART). Methods Eighty adults with chronic HIV infection on cART (>97% with plasma and CSF HIV RNA <50 copies/mL) were enrolled into a prospective observational cohort and underwent assessments of neurocognition and pre-morbid cognitive ability at two visits 18 months apart. HIV DNA in PBMCs was measured by real-time PCR at the same time-points. Results At baseline, 46% had non-demented HAND; 7.5% had HAD. Neurocognitive decline occurred in 14% and was more likely in those with HAD (p<.03). Low pre-morbid cognitive ability was uniquely associated with HAD (p<.05). Log10 HIV DNA copies were stable between study visits (2.26 vs. 2.22 per 106 PBMC). Baseline HIV DNA levels were higher in those with lower pre-morbid cognitive ability (p<.04), and higher in those with no ART treatment during HIV infection 1st year (p = .03). Baseline HIV DNA was not associated with overall neurocognition. However, % ln HIV DNA change was associated with decline in semantic fluency in unadjusted and adjusted analyses (p = .01-.03), and motor-coordination (p = .02-.12) to a lesser extent. Conclusions PBMC HIV DNA plays a role in HAD pathogenesis, and this is moderated by pre-morbid cognitive ability in the context of long-term viral suppression. While the HIV DNA levels in PBMC are not associated with current non-demented HAND, increasing HIV DNA levels were associated with a decline in neurocognitive functions associated with HAND progression.
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Affiliation(s)
- Lucette A. Cysique
- Neuroscience Research Australia, Sydney, Australia
- Peter Duncan Neurosciences Unit, St. Vincent’s Centre for Applied Medical Research, Sydney, Australia
- The University of New South Wales (UNSW), Sydney, Australia
- * E-mail:
| | - William J. Hey-Cunningham
- The Kirby Institute, UNSW Medicine, UNSW Australia, Sydney, Australia
- The University of New South Wales (UNSW), Sydney, Australia
| | - Nadene Dermody
- Neuroscience Research Australia, Sydney, Australia
- Macquarie University, Sydney, Australia
| | - Phillip Chan
- Departments of Neurology and HIV, St. Vincent’s Hospital, Darlinghurst, Sydney, Australia
- Queen Elizabeth Hospital, Hong Kong Special Administrative Region, People’s Republic of China
| | - Bruce J. Brew
- Peter Duncan Neurosciences Unit, St. Vincent’s Centre for Applied Medical Research, Sydney, Australia
- Departments of Neurology and HIV, St. Vincent’s Hospital, Darlinghurst, Sydney, Australia
- The University of New South Wales (UNSW), Sydney, Australia
| | - Kersten K. Koelsch
- The Kirby Institute, UNSW Medicine, UNSW Australia, Sydney, Australia
- Departments of Neurology and HIV, St. Vincent’s Hospital, Darlinghurst, Sydney, Australia
- The University of New South Wales (UNSW), Sydney, Australia
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Cardoso RM, de Araújo NNSL, Romero GAS, Souza TTCM, Dietrich AG, Mendes JD, Reis ML, Ferreira JBC, Hecht MM, Gurgel-Gonçalves R. Expanding the knowledge about Leishmania species in wild mammals and dogs in the Brazilian savannah. Parasit Vectors 2015; 8:171. [PMID: 25889365 PMCID: PMC4386096 DOI: 10.1186/s13071-015-0780-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 03/04/2015] [Indexed: 11/12/2022] Open
Abstract
Background Wild, synanthropic and domestic mammals act as hosts and/or reservoirs of several Leishmania spp. Studies on possible reservoirs of Leishmania in different areas are fundamental to understand host-parasite interactions and develop strategies for the surveillance and control of leishmaniasis. In the present study, we evaluated the Leishmania spp. occurrence in mammals in two conservation units and their surroundings in Brasília, Federal District (FD), Brazil. Methods Small mammals were captured in Brasília National Park (BNP) and Contagem Biological Reserve (CBR) and dogs were sampled in residential areas in their vicinity. Skin and blood samples were evaluated by PCR using different molecular markers (D7 24Sα rRNA and rDNA ITS1). Leishmania species were identified by sequencing of PCR products. Dog blood samples were subjected to the rapid immunochromatographic test (DPP) for detection of anti-Leishmania infantum antibodies. Results 179 wild mammals were studied and 20.1% had Leishmania DNA successfully detected in at least one sample. Six mammal species were considered infected: Clyomys laticeps, Necromys lasiurus, Nectomys rattus, Rhipidomys macrurus, Didelphis albiventris and Gracilinanus agilis. No significant difference, comparing the proportion of individuals with Leishmania spp., was observed between the sampled areas and wild mammal species. Most of the positive samples were collected from the rodent N. lasiurus, infected by L. amazonensis or L. braziliensis. Moreover, infections by Trypanosoma spp. were detected in N. lasiurus and G. agilis. All 19 dog samples were positive by DPP; however, only three (15.8%) were confirmed by PCR assays. DNA sequences of ITS1 dog amplicons showed 100% identity with L. infantum sequence. Conclusions The results suggest the participation of six species of wild mammals in the enzootic transmission of Leishmania spp. in FD. This is the first report of L. amazonensis in N. lasiurus. Electronic supplementary material The online version of this article (doi:10.1186/s13071-015-0780-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rebecca Martins Cardoso
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Nadjar Nitz Silva Lociks de Araújo
- Laboratório Multidisciplinar de Pesquisa em Doença de Chagas, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Gustavo Adolfo Sierra Romero
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Thaís Tâmara Castro Minuzzi Souza
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Ana Gabriela Dietrich
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Júnio Donizette Mendes
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Marcelo Lima Reis
- Instituto Chico Mendes de Conservação da Biodiversidade, 70670350, Distrito Federal, Brasília, Brazil.
| | - Jônatas Barbosa Cavalcante Ferreira
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Mariana Machado Hecht
- Laboratório Multidisciplinar de Pesquisa em Doença de Chagas, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Rodrigo Gurgel-Gonçalves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
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10
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Krolewiecki AJ, Gil JF, Quipildor M, Cajal SP, Pravia C, Juarez M, Villalpando C, Locatelli FM, Chanampa M, Castillo G, Oreste MF, Hoyos CL, Negri V, Nasser JR. Restricted outbreak of American tegumentary leishmaniasis with high microfocal transmission. Am J Trop Med Hyg 2013; 88:578-82. [PMID: 23339200 DOI: 10.4269/ajtmh.12-0475] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Cutaneous leishmaniasis is endemic in Salta, the northwestern province of Argentina. We describe an outbreak involving five recreational hunters whose exposure was limited to several hours in a residual patch of primary forest. All patients presented with typical cutaneous lesions after a mean incubation period of 59 days (range 15-78), and one developed simultaneous mucosal involvement. Polymerase chain reaction analysis of lesions confirmed Leishmania (V.) braziliensis as the etiologic agent in three cases. All patients were cured with anti-Leishmania treatment. Entomologic surveys in the transmission area revealed a predominance of Lutzomyia neivai. This outbreak report confirms a microfocal transmission pattern of tegumentary leishmaniasis in the Americas and based on a well-determined exposure, allows the determination of incubation times for leishmaniasis caused by Leishmania braziliensis.
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Affiliation(s)
- Alejandro J Krolewiecki
- Instituto de Investigaciones en Enfermedades Tropicales, Sede Regional Orán, Universidad Nacional de Salta, Salta, Argentina.
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11
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Ferreira EC, Gontijo CM, Cruz I, Melo MN, Silva AM. Alternative PCR protocol using a single primer set for assessing DNA quality in several tissues from a large variety of mammalian species living in areas endemic for leishmaniasis. Mem Inst Oswaldo Cruz 2011; 105:895-8. [PMID: 21120359 DOI: 10.1590/s0074-02762010000700009] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Accepted: 08/12/2010] [Indexed: 11/22/2022] Open
Abstract
The aim of this work was to establish a modified pre-diagnostic polymerase chain reaction (PCR) protocol using a single primer set that enables successful amplification of a highly conserved mammalian sequence in order to determine overall sample DNA quality for multiple mammalian species that inhabit areas endemic for leishmaniasis. The gene encoding interphotoreceptor retinoid-binding protein (IRBP), but not other conserved genes, was efficiently amplified in DNA samples from tail skin, ear skin, bone marrow, liver and spleen from all of the species tested. In tissue samples that were PCR-positive for Leishmania, we found that DNA from 100%, 55% and 22% of the samples tested resulted in a positive PCR reaction for the IRBP, beta-actin and beta-globin genes, respectively. Nucleotide sequencing of an IRBP amplicon resolved any questions regarding the taxonomical classification of a rodent, which was previously based simply on the morphological features of the animal. Therefore, PCR amplification and analysis of the IRBP amplicon are suitable for pre-diagnostically assessing DNA quality and identifying mammalian species living in areas endemic to leishmaniasis and other diseases.
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12
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Dacheux L, Reynes J, Buchy P, Sivuth O, Diop B, Rousset D, Rathat C, Jolly N, Dufourcq J, Nareth C, Diop S, Iehlé C, Rajerison R, Sadorge C, Bourhy H. A Reliable Diagnosis of Human Rabies Based on Analysis of Skin Biopsy Specimens. Clin Infect Dis 2008; 47:1410-7. [DOI: 10.1086/592969] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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13
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Ohuchida K, Mizumoto K, Yamada D, Fujii K, Ishikawa N, Konomi H, Nagai E, Yamaguchi K, Tsuneyoshi M, Tanaka M. Quantitative analysis of MUC1 and MUC5AC mRNA in pancreatic juice for preoperative diagnosis of pancreatic cancer. Int J Cancer 2006; 118:405-11. [PMID: 16052519 DOI: 10.1002/ijc.21317] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Pancreatic juice is a promising type of diagnostic sample for pancreatic cancer, and members of the mucin (MUC) family are diagnostic candidates. To evaluate the utility of MUC family members as diagnostic markers, we measured MUC mRNA expression in pancreatic tissues and pancreatic juice obtained from patients with different pancreatic diseases as well as in pancreatic cancer cell lines by real-time PCR. Furthermore, to support the possibility of early diagnosis by quantification of MUC1 and MUC5AC, immunohistochemistry and microdissection-based quantitative analysis of mRNA were carried out. There was no significant correlation between MUC1 and MUC5AC expression in cell lines. When beta-actin was used as a reference gene, median MUC1 and MUC5AC mRNA expression levels were remarkably greater in tumoral tissues than in non-tumoral tissues, but median MUC4 and MUC6 mRNA expression levels were not. Receiver operating characteristic curve analysis showed that quantitative analysis of MUC1 and MUC5AC mRNA in pancreatic juice is better diagnostic modality than that of MUC4 and MUC6 mRNA. Immunohistochemistry showed that MUC1 and MUC5AC were highly expressed in invasive ductal carcinomas (IDC) and moderately expressed in high-grade pancreatic intraepithelial neoplasia (PanIN); no staining was observed in normal ducts. Analysis of cells isolated by microdissection showed stepwise upregulation of MUC1 and MUC5AC in the development of high-grade PanIN to IDC. Our results suggest that MUC1 and MUC5AC are upregulated stepwise in pancreatic carcinogenesis and that quantitative assessment of MUC1 and MUC5AC mRNA in pancreatic juice has high potential for preoperative diagnosis of pancreatic cancer.
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Affiliation(s)
- Kenoki Ohuchida
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Kawamura M, Kasai H, He L, Deng X, Yamashita A, Terunuma H, Horiuchi I, Tanabe F, Ito M. Antithetical effects of hemicellulase-treated Agaricus blazei on the maturation of murine bone-marrow-derived dendritic cells. Immunology 2005; 114:397-409. [PMID: 15720441 PMCID: PMC1782089 DOI: 10.1111/j.1365-2567.2004.02106.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
We report the effects of hemicellulase-treated Agaricus blazei (ABH) on the maturation of bone-marrow-derived dendritic cells (BMDCs). ABH activated immature BMDCs, inducing up-regulation of surface molecules, such as CD40, CD80 and major histocompatibility complex class I antigens, as well as inducing allogeneic T-cell proliferation and T helper type 1 cell development. However, unlike lipopolysaccharide (LPS), ABH did not stimulate the BMDCs to produce proinflammatory cytokines, such as interleukin-12 (IL-12) p40, tumour necrosis factor-alpha, or IL-1beta. In addition, ABH suppressed LPS-induced DC responses. Pretreatment of DCs with ABH markedly reduced the levels of LPS-induced cytokine secretion, while only slightly decreasing up-regulation of the surface molecules involved in maturation. ABH also had a significant impact on peptidoglycan-induced or CpG oligodeoxynucleotide-induced IL-12p40 production in DCs. The inhibition of LPS-induced responses was not associated with a cytotoxic effect of ABH nor with an anti-inflammatory effect of IL-10. However, ABH decreased NF-kappaB-induced reporter gene expression in LPS-stimulated J774.1 cells. Interestingly, DCs preincubated with ABH and then stimulated with LPS augmented T helper type 1 responses in culture with allogeneic T cells as compared to LPS-stimulated but non-ABH-pretreated DCs. These observations suggest that ABH regulates DC-mediated responses.
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Affiliation(s)
- Masaki Kawamura
- Department of Alternative Medicine and Bioregulation, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan.
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15
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Mälarstig A, Tenno T, Jossan S, Aberg M, Siegbahn A. A quantitative real-time PCR method for tissue factor mRNA. Thromb Res 2004; 112:175-83. [PMID: 14967415 DOI: 10.1016/j.thromres.2003.11.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2003] [Revised: 10/28/2003] [Accepted: 11/04/2003] [Indexed: 11/23/2022]
Abstract
BACKGROUND Tissue factor (TF) is primarily known for its function to initiate blood coagulation. The range of in vivo expression of TF is wide and requires a dynamic assay for monitoring. A general method for TF mRNA quantitation that is dynamic, sensitive and applicable to a variety of experimental systems or clinical situations is therefore desirable. OBJECTIVES To develop a method for sensitive and dynamic quantitation of TF mRNA in human blood cells. METHODS TF mRNA expression was analysed and evaluated in monocyte isolations, in whole blood (healthy volunteers and patients scheduled for percutaneous coronary intervention, PCI) and in a panel of human cell lines. RNA was extracted, reverse transcribed and subjected to real-time PCR amplification, according to the TaqMan technology. A TF plasmid was constructed as calibrator of the assay. Two housekeeping genes used as endogenous controls for cDNA quality and integrity were evaluated. RESULTS The assay was linear by seven orders of magnitude and detected down to 10(2) copies of the TF plasmid. The coefficient of variation was 4% intra-assay and 28% between the assays when using beta2MG as endogenous control. The beta-actin gene expression was induced by treatment with lipopolysaccharide (LPS) in blood leukocytes and could not be used as an endogenous control. However, beta2MG showed only minor variations upon treatment with LPS. The TF mRNA and antigen expression, measured in a Western blot, correlated well (R(2)=0.903) in a panel of 11 human cell lines. CONCLUSIONS We have established a method for sensitive and dynamic quantitation of TF mRNA in experimental systems and for clinical situations.
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Affiliation(s)
- Anders Mälarstig
- Department of Medical Sciences, Uppsala University, Uppsala S-75185, Sweden
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16
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Glanemann M, Strenziok R, Kuntze R, Münchow S, Dikopoulos N, Lippek F, Langrehr JM, Dietel M, Neuhaus P, Nussler AK. Ischemic preconditioning and methylprednisolone both equally reduce hepatic ischemia/reperfusion injury. Surgery 2004; 135:203-14. [PMID: 14739856 DOI: 10.1016/j.surg.2003.08.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Ischemic preconditioning (I/P) and methylprednisolone (MP) have been suggested to protect against ischemia-reperfusion (IR) injury, which results in an increased tolerance against organ hypoxia. METHODS Before 45 minutes of hepatic ischemia, male Wistar rats were pretreated with either I/P (5/30 minutes) or MP (30 mg/kg BW). The degree of IR injury and the postischemic inflammatory (leukocyte infiltration, myeloperoxidase, intercellular adhesion molecule-1) and apoptotic (TUNEL, caspase 3, cytochrome C) activity was measured in both groups and compared with non-pretreated (ischemic) animals. RESULTS Histology and enzyme release revealed that I/P and MP treatment provided significant protection as compared with ischemic controls. TUNEL-positive cells, as well as caspase 3 and cytochrome C expression, were clearly reduced in hepatic tissue of MP-treated animals and partially reduced in I/P-treated animals when compared with ischemic animals. The inflammatory response was considerably reduced in MP- and I/P-treated animals, especially in the early period after ischemia. NF-kappaB/Rel-binding activity was increased after I/P and decreased in MP-treated animals, whereas ischemic controls showed a constant binding activity. CONCLUSIONS MP (probably by downregulation of NF-kappaB-binding activity) and I/P attenuated the postischemic apoptotic and inflammatory response. Both treatments equally reduced IR-related hepatocellular damage, and, thus, may also be applied equally in surgery involving warm organ hypoxia.
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Affiliation(s)
- Matthias Glanemann
- Department of General, Visceral, and Transplantation Surgery, Charité, Campus Virchow Klinikum, Humboldt University Berlin, Berlin, Germany
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17
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Parvin MN, Tsumura K, Akamatsu T, Kanamori N, Hosoi K. Expression and localization of AQP5 in the stomach and duodenum of the rat. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1542:116-24. [PMID: 11853885 DOI: 10.1016/s0167-4889(01)00172-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The expression, localization, and regulation of aquaporin 5 (AQP5), a member of the water channel family of proteins, was investigated in tissues of the rat gastrointestinal tract. Reverse transcriptase--polymerase chain reaction (RT--PCR) detected AQP5 mRNA in the lower stomach and duodenum. DNA sequencing confirmed that the cDNA fragment amplified had the complete sequence of the AQP5 cDNA fragment. Western blot analysis indicated the expression of a 27 kDa molecular mass AQP5 protein in the lower stomach and duodenum, which size was the same as that found for the protein in the submandibular gland and lungs. By immunohistochemistry using the IgG affinity-purified AQP5 antibody, the pyloric gland and Brunner's gland were primarily stained in the lower stomach and duodenum, respectively; a strong staining appeared in the apical and lateral membranes in both glands. These results indicate that AQP5 is present in the rat lower stomach and duodenum where it may be involved in a water transport mechanism. These results also support the idea that AQP5, and probably other aquaporins, are involved in water secretion in the stomach and duodenum although the volume of water transported via AQPs is unclear.
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Affiliation(s)
- Most Nahid Parvin
- Department of Physiology and Oral Physiology, Tokushima University School of Dentistry, 3 Kuramoto-cho, Tokushima-Shi, 770-8504, Tokushima, Japan
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18
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Hyun JS, Baig MR, Yang DY, Leungwattanakij S, Kim KD, Abdel-Mageed AB, Bivalacqua TJ, Hellstrom WJG. Localization of peripheral dopamine D1 and D2 receptors in rat and human seminal vesicles. JOURNAL OF ANDROLOGY 2002; 23:114-20. [PMID: 11783439 DOI: 10.1002/j.1939-4640.2002.tb02604.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Dopamine, an established neurotransmitter in the central nervous system, is recognized for its role in penile erection and ejaculation in rats. However, its complete mechanism of action in the genitourinary tract is unknown. The objective of this study was to investigate the existence and expression of peripheral dopamine D1 and D2 receptor messenger RNAs (mRNAs) and corresponding proteins in rat and human seminal vesicles. The seminal vesicle tissues of male Sprague-Dawley rats and human radical prostatectomy specimens were used to extract total RNA and proteins, and to prepare slide sections. Rat hypothalamus tissue served as a control for dopamine D1 and D2 receptors. Testing for the presence and expression of peripheral dopamine D1 and D2 receptor mRNAs in rat and human seminal vesicle tissues was performed by reverse transcription-polymerase chain reaction. Western blotting was used to detect corresponding proteins of D1 and D2 receptors. Immunohistochemical staining using rabbit antipeptide polyclonal antibodies was employed to identify and anatomically localize dopamine D1 and D2 receptor proteins in rat and human seminal vesicles. Dopamine D1 and D2 receptor transcripts were detected in both human and rat seminal vesicle tissues. Western blot analysis demonstrated that peripheral dopamine D1 and D2 receptor proteins exist in both human and rat seminal vesicle tissues. Immunohistochemical analysis demonstrated the localization of peripheral dopamine D1 and D2 receptors to the smooth muscle layer of human and rat seminal vesicles. The results of this study demonstrate that peripheral dopamine D1 and D2 receptors are present in the seminal vesicle tissue in both rats and humans. Although these results suggest that seminal emission may be mediated in part by the stimulation of peripheral dopamine receptors located in the seminal vesicles, the functional significance of dopamine in male reproductive tract has yet to be fully defined.
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Affiliation(s)
- Jae-Seog Hyun
- Department of Urology, Tulane University Health Sciences Center, New Orleans, Louisiana 70112, USA
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Enomoto K, Kataoka H, Hirota A. Semiquantitative analysis of the expression of GABA-A receptor subunits in the developing embryonic chick brain stem. THE JAPANESE JOURNAL OF PHYSIOLOGY 2001; 51:53-61. [PMID: 11281996 DOI: 10.2170/jjphysiol.51.53] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The expression levels of seven types of gamma-aminobutyric acid-A (GABA-A) receptor subunits (alpha1, beta2, beta3, beta4, gamma1, gamma2, and gamma4) were quantified in the embryonic chick brain stem at 2 to 20 d of incubation (E2 to E20) and just after hatching. The expression level of mRNA was measured by using semiquantitative reverse transcription-polymerase chain reaction (RT-PCR). When property regions were amplified, two products were observed for each of the beta2, beta4, and gamma2 subunits because of alternative splicing. These were named beta2S and beta2L, beta4S and beta4L, and gamma2S and gamma2L for shorter and longer fragments, respectively. Transcripts of alpha1, beta2L, beta2S, beta3, beta4L, beta4S, gamma1, and gamma2S subunits were first detected from E2 to E5 brain stems. The expression level of each subunit increased gradually with development and reached a plateau at E9 to E12. In contrast, a delay occurred in the appearance of both the gamma4 and gamma2L subunits, which were not detected until E8 to E10. The absence of gamma4 and/or gamma2L subunits may explain differences in the pharmacological characteristics of GABA-A receptors at the early stages of development.
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Affiliation(s)
- K Enomoto
- Department of Physiology, Shimane Medical University, Izumo, 693-8501 Japan.
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Smith J, McElhinney LM, Heaton PR, Black EM, Lowings JP. Assessment of template quality by the incorporation of an internal control into a RT-PCR for the detection of rabies and rabies-related viruses. J Virol Methods 2000; 84:107-15. [PMID: 10680960 DOI: 10.1016/s0166-0934(99)00124-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A method is described to assess RNA template quality by the incorporation of a ribosomal RNA (rRNA) internal (in tube) control into a standard rabies and rabies-related virus specific RT-PCR. Specific virus and rRNA templates were co-amplified in a duplex reaction from RNA extracts derived from 60 isolates representing all six of the established lyssavirus genotypes. To ensure a wide species applicability of this technique we demonstrated that the rRNA assay was capable of functioning using the cells or tissues of 14 different mammals. Parallel studies between the duplex and the unlinked lyssavirus assay demonstrated only a minor reduction in the sensitivity of the former test. The ribosomal and viral targets (unlike beta-actin RNA) were shown to have similar degradation kinetics making rRNA amplification a good control for viral target integrity. As a consequence, the use of this system would reduce the likelihood of obtaining false negative RT-PCR results from lyssavirus infected material.
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Affiliation(s)
- J Smith
- Department of Virology, Veterinary Laboratories Agency (Weybridge), Addlestone, Surrey, UK.
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21
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Reddy NR, Wilkie BN. Quantitation of porcine cytokine and beta 2-microglobulin mRNA expression by reverse transcription polymerase chain reaction. J Immunol Methods 2000; 233:83-93. [PMID: 10648859 DOI: 10.1016/s0022-1759(99)00188-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A quantitative reverse transcription polymerase chain reaction (Q-RT-PCR) method was developed to measure pig cytokine mRNA expression. The method utilized an internal control with primer sequences for interleukin (IL)-1alpha, 2, 4, 6, 8, 10, tumor necrosis factor (TNF)-alpha, TNF-beta, interferon (IFN)-gamma and beta-2 microglobulin (beta(2)-m). The control was modified by insertion of sequences for IL-12 (p35 and p40). Pig blood mononuclear cells (BMCs) were stimulated in vitro with phytohemagglutinin-P (PHA-P) or bacterial lipopolysaccharide and cytokine or beta(2)-m mRNA quantified. To evaluate method performance and the use of beta(2)-m as a housekeeping gene (HKG), beta(2)-m mRNA expression was examined. Quantitative analysis was achieved at up to threefold differences between control and target for beta(2)-m. Results were reproducible with coefficients of variations (CVs) ranging between 12.5% and 22.4%. There were no significant differences in beta(2)-m mRNA between treated and untreated cells or between untreated cells of three pigs (p>/=0.05) suggesting that beta(2)-m can be used as a HKG. The method allows quantitation of multiple cytokine mRNAs using a single internal control subjecting target and control to the same conditions throughout the Q-RT-PCR. The system is versatile since the control plasmid can be modified by insertion or deletion of sequences.
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Affiliation(s)
- N R Reddy
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
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Utsugisawa K, Nagane Y, Tohgi H, Yoshimura M, Ohba H, Genda Y. Changes with aging and ischemia in nicotinic acetylcholine receptor subunit alpha7 mRNA expression in postmortem human frontal cortex and putamen. Neurosci Lett 1999; 270:145-8. [PMID: 10462115 DOI: 10.1016/s0304-3940(99)00473-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Age-related changes in nicotinic acetylcholine receptor (nAChR) subunit alpha7 messenger RNA (mRNA) expression in postmortem human frontal cortex and putamen of controls and status lacunaris patients were investigated using nonradioactive reverse transcription(RT)-PCR. In the frontal cortex of control brains, alpha7 subunit mRNA significantly decreased with age (P < 0.05). In the putamen, alpha7 subunit mRNA expression was significantly lower than that in the frontal cortex (P < 0.0001), and showed no significant correlation with age. However, in cases with status lacunaris in the putamen, alpha7 subunit mRNA expression was significantly higher compared with controls (P < 0.001). The reduction in alpha7 nAChR in the frontal cortex with age may decrease functional cholinergic synapses and cortical activity, and play a role in the cognitive impairments associated with normal aging. The functional significance of the upregulation of alpha7 nAChR mRNA in ischemic conditions remains to be determined.
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Affiliation(s)
- K Utsugisawa
- Department of Neurology, Iwate Medical University, Morioka, Japan
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Utsugisawa K, Tohgi H, Yoshimura M, Nagane Y, Ukitsu M. Quantitation of nicotinic acetylcholine receptor subunits alpha 4 and beta 2 messenger RNA in postmortem human brain using a non-radioactive RT-PCR and CCD imaging system. BRAIN RESEARCH. BRAIN RESEARCH PROTOCOLS 1999; 4:92-6. [PMID: 10234456 DOI: 10.1016/s1385-299x(99)00011-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We present a simple and rapid procedure for quantifying mRNA in the brain after RT-PCR, in which the intensity of the ethidium bromide luminescence of PCR products is measured directly from electrophoretic gels by a highly sensitive CCD camera combined with an image analyzing computer system (Gel Doc 1000 system). The CCD camera allows the mRNA in the ethidium bromide-stained PCR-amplified bands to be quantified in a broad exponential range of PCR cycles. The proposed protocol enables standard curves to be constructed to examine the relationship between the number of reaction cycles and amplified log intensity and between the amount of sample RNA for RT-PCR and amplified intensity. The method was applied to nicotinic acetylcholine receptor (nAChR) subunits alpha 4 and beta 2 mRNA in postmortem human putamen in the present study, but is also applicable to mRNAs of other receptors and neurotransmitter precursor peptides.
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Affiliation(s)
- K Utsugisawa
- Department of Neurology, Iwate Medical University, Morioka, Japan
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Serazin-Leroy V, Denis-Henriot D, Morot M, de Mazancourt P, Giudicelli Y. Semi-quantitative RT-PCR for comparison of mRNAs in cells with different amounts of housekeeping gene transcripts. Mol Cell Probes 1998; 12:283-91. [PMID: 9778453 DOI: 10.1006/mcpr.1998.0182] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A simple method is reported here for the semi-quantitative assay of mRNAs in the presence of an exogenous mRNA (pBR322 transcript) as a standard. This method uses the co-reverse transcription and co-amplification (co RT-PCR) of the target and standard mRNAs. This procedure enables transcripts to be compared when the differentiation process affects the transcription pattern of the beta-actin housekeeping gene, a commonly used internal standard. This method is sensitive and avoids constructing internal competitive RNA standards. As an example, it is shown that beta-actin transcription decreases and type V adenylyl cyclase transcription increases in adipocytes, when compared to preadipocytes.
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Affiliation(s)
- V Serazin-Leroy
- Laboratoire de Biochimie de la Faculté de Médecine Paris-Ouest, INSERM CJF 94-02, Université René, Descartes Paris V, France
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25
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Tohgi H, Utsugisawa K, Yoshimura M, Nagane Y, Mihara M. Alterations with aging and ischemia in nicotinic acetylcholine receptor subunits alpha4 and beta2 messenger RNA expression in postmortem human putamen. Implications for susceptibility to parkinsonism. Brain Res 1998; 791:186-90. [PMID: 9593888 DOI: 10.1016/s0006-8993(98)00093-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nicotine activates the dopaminergic system and acts to alleviate hypokinetic disorders (parkinsonism). The frequency of parkinsonism increases with age and is sometimes associated with multiple small infarcts (status lacunaris) in the putamen. To investigate changes with aging in control cases free from neurological disease and changes in cases with multiple small infarcts (status lacunaris) in the putamen, the present study determined nicotinic acetylcholine receptor (nAChR) subunit alpha4 and beta2 messenger RNA (mRNA) expression in the postmortem human putamen using the reverse transcription-polymerase chain reaction (RT-PCR). In controls, alpha4 subunit mRNA expression was unaltered, but beta2 subunit mRNA expression decreased significantly with age. In cases with status lacunaris, both beta2 and alpha4 subunit mRNA expressions were significantly lower than in the control cases. The reduction in beta2 mRNA expression alone, or in both alpha4 and beta2 mRNA expressions, suggests a reduction in functional nAChRs in the putamen, which may in part explain the susceptibility to hypokinetic disorders of the elderly and subjects with ischemic damage in the striatum.
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Affiliation(s)
- H Tohgi
- Department of Neurology, Iwate Medical University, 19-1 uchimaru, Morioka, Iwate 020, Japan
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26
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Tohgi H, Utsugisawa K, Yoshimura M, Nagane Y, Mihara M. Age-related changes in nicotinic acetylcholine receptor subunits alpha4 and beta2 messenger RNA expression in postmortem human frontal cortex and hippocampus. Neurosci Lett 1998; 245:139-42. [PMID: 9605475 DOI: 10.1016/s0304-3940(98)00205-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Age-related changes in nicotinic acetylcholine receptor (nAChR) subunit alpha4 and beta2 messenger RNA (mRNA) expression in the postmortem human frontal cortex and hippocampus was investigated using the reverse transcription-polymerase chain reaction (RT-PCR). In the frontal cortex, both alpha4 and beta2 subunit mRNA expression decreased with age. In the hippocampus, alpha4 subunit mRNA expression was unaltered, while beta2 subunit mRNA expression significantly decreased with age. These findings suggest that nAChR transcription decreases during aging with differing vulnerability between subunits and brain regions, which could in part contribute to the reduction in cognitive functions seen in the elderly.
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Affiliation(s)
- H Tohgi
- Department of Neurology, Iwate Medical University, Morioka, Japan
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27
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Tohgi H, Utsugisawa K, Yoshimura M, Nagane Y, Mihara M. Age-related changes in D1 and D2 receptor mRNA expression in postmortem human putamen with and without multiple small infarcts. Neurosci Lett 1998; 243:37-40. [PMID: 9535107 DOI: 10.1016/s0304-3940(98)00080-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Expression of messenger RNAs (mRNAs) encoding the D1 and D2 dopamine receptors as a function of age was determined in the human putamen using the reverse transcription-polymerase chain reaction (RT-PCR). In cases without multiple small infarcts (status lacunaris) in the putamen, D1 mRNA expression was unaltered, while D2 mRNA expression significantly decreased with age. Both D1 and D2 mRNA expression was lower in cases with status lacunaris. The reduction in D1 receptors primarily located on striatonigral neurons or D2 receptors primarily located on striatopallidal neurons may inhibit thalamocortical neurons. The decreased transcription of D1 and D2 receptor genes may in part account for increased susceptibility to hypokinetic disorders in the elderly.
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Affiliation(s)
- H Tohgi
- Department of Neurology, Iwate Medical University, Morioka, Japan
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28
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Gansauge S, Gansauge F, Nussler AK, Rau B, Poch B, Schoenberg MH, Beger HG. Exogenous, but not endogenous, nitric oxide increases proliferation rates in senescent human fibroblasts. FEBS Lett 1997; 410:160-4. [PMID: 9237621 DOI: 10.1016/s0014-5793(97)00544-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We investigated the effects of endogenously produced and exogenously applied nitric oxide (NO) on cell proliferation rates and cell cycle regulation in senescent human fibroblasts (WI38). Induction of inducible nitric oxide synthase by tumor necrosis factor-alpha, interferon-gamma and interleukin-1beta inhibited cell proliferation and led to a G1 arrest. These effects were partially reversible by N(G)-monomethyl-arginine (NMA). Addition of the NO donors sodium nitroprusside (SNP) or S-nitroso-N-acetylpenicillamine (SNAP) increased cell proliferation rates as well as the S/G2 fraction. This points to a functional role of NO in cell cycle regulation and cell proliferation in human fibroblasts which depends on the mode of NO generation as well as the culture conditions used.
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Affiliation(s)
- S Gansauge
- Department of General Surgery, University of Ulm, Germany
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29
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Liska V, Lerche NW, Ruprecht RM. Simultaneous detection of simian retrovirus type D serotypes 1, 2, and 3 by polymerase chain reaction. AIDS Res Hum Retroviruses 1997; 13:433-7. [PMID: 9075485 DOI: 10.1089/aid.1997.13.433] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Asymptomatic infection of macaques with macaques with simian retroviruses type D (SRV/D), the etiologic agents of one form of retrovirus-induced simian immunodeficiency disease, can confound experiments with the simian immunodeficiency virus (SIV), which also induces immunodeficiency disease in macaques. The SIV/macaque model is the preferred nonhuman primate model for AIDS-related research. Serological screening for SRV/D alone is insufficient because not all infected animals seroconvert, and virus isolation by cocultivation may require 4 to 6 weeks. We have established a DNA polymerase chain reaction (PCR) assay. One set of nested primers allows detection of SRV/D serotypes 1, 2, and 3 and distinguishes SRV-2 from the other two serotypes. The PCR assay is sensitive; a single proviral copy of SRV/D could be detected in 150,000 to 210,000 macaque peripheral blood mononuclear cells (PBMCs). When applied to a panel of virus isolation-positive macaque samples, the PCR assay was positive in 100% of the tests. No false-positive results were seen when known specific-pathogen-free (SPF) macaques were examined. We propose that macaques be screened with a combination of SRV/D serology and this DNA PCR assay prior to enrollment in experiments with SIV.
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Affiliation(s)
- V Liska
- Laboratory of Viral Pathogenesis, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
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30
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Harada N, Gansauge S, Gansauge F, Gause H, Shimoyama S, Imaizumi T, Mattfeld T, Schoenberg MH, Beger HG. Nuclear accumulation of p53 correlates significantly with clinical features and inversely with the expression of the cyclin-dependent kinase inhibitor p21(WAF1/CIP1) in pancreatic cancer. Br J Cancer 1997; 76:299-305. [PMID: 9252195 PMCID: PMC2224055 DOI: 10.1038/bjc.1997.382] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Recent studies have suggested a p53-independent expression of p21(WAF1/CIP1). We investigated the correlation between p53 overexpression and the expression of p21(WAF1/CIP1) in 57 patients with pancreatic adenocarcinoma. By means of reverse transcription and polymerase chain reaction (RT-PCR), we examined the mRNA levels of WAF1/CIP1 and compared them with the p53 status in 20 patients and in a further six pancreatic tumour cell lines. In pancreatic cancer tissues, immunohistological evaluation revealed a significant correlation between active p53 and p21(WAF1/CIP1) (P < 0.005) as well as WAF1/CIP1 mRNA expression (P < 0.005). This coherence was also evident in human pancreatic carcinoma cell lines. The analysis of p53 and p21(WAF1/CIP1) expression in relation to clinicopathological features revealed a significant correlation between p53 overexpression and tumour stage, tumour size, grading and lymph node metastases, whereas p21(WAF1/CIP1) expression correlated only with tumour size. We conclude that the expression of p21(WAF1/CIP1) normally depends on active p53, but that there may also exist p53-independent pathways of induction that reduce the correlation of p21(WAF1/CIP1) to clinicopathological features.
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Affiliation(s)
- N Harada
- Department of General Surgery, University of Ulm, Germany
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31
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Quantitation of Pseudomonas sp. strain B13(FR1) in the marine environment by competitive polymerase chain reaction. J Microbiol Methods 1995. [DOI: 10.1016/0167-7012(95)00010-i] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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