ABSTRACT
Entre los supuestos no convencionales de la homeopatía, el uso de medicamentos en diluciones altas (HD, por sus siglas en inglés) es una causa de objeciones y escepticismo entre la comunidad científica, formada dentro del paradigma de la dependencia de la dosis de la farmacología clásica. La investigación que busca evidenciar los efectos de las HD homeopáticas recurre a varios modelos experimentales (in vitro, plantas y animales). Objetivo: Describir los resultados de estudios con alta calidad metodológica que han demostrado los efectos positivos de las HD homeopáticas sobre las plantas. Métodos: Tomando como fuente de referencia las revisiones publicadas hasta 2015, actualizamos la información añadiendo datos de estudios recientes incluidos en la base de datos PubMed. Resultados: De los 167 estudios experimentales analizados, 48 cumplieron los criterios mínimos de calidad metodológica, de los cuales 29 detectaron efectos específicos de las diluciones homeopáticas altas sobre las plantas mediante la comparación con controles adecuados. Conclusiones: A pesar de que la mayor parte de los experimentos presentaba una calidad metodológica por debajo del estándar, los estudios que emplearon sistemáticamente reproducibilidad y controles negativos demostraron indiscutibles efectos significativos de las HD homeopáticas sobre las plantas.
Among the non-conventional assumptions of homeopathy, the use of medicines in high dilutions (HD) is a cause for objections and skepticism among the scientific community, trained within the dose-dependency paradigm of classic pharmacology. Research aiming at evidencing the effects of homeopathic HD has resource to several experimental models (in vitro, plants and animals). Aim: To describe the results of studies with high methodological quality that demonstrated positive effects of homeopathic HD on plants. Methods: Taking reviews published until 2015 as reference source, we updated the information through addition of data from recent studies included in database PubMed. Results: From 167 experimental studies analyzed, 48 met the minimum criteria of methodological quality, from which 29 detected specific effects of homeopathic high dilutions on plants through comparison to adequate controls. Conclusions: Despite the substandard methodological quality of most experiments, studies with systematic use of negative controls and reproducibility demonstrated significant indisputable effects of homeopathic HD on plants.
Subject(s)
Plants/drug effects , Dynamization , Homeopathic RemedyABSTRACT
Introdução: Dentre as premissas não convencionais do modelo homeopático, o emprego de doses ultradiluídas de medicamentos desperta questionamentos e ceticismo na classe científica, acostumada ao paradigma dose-dependente da farmacologia clássica. Para evidenciar o efeito das ultradiluições homeopáticas em seres vivos, pesquisas são realizadas em diversos modelos experimentais (in vitro, em plantas e em animais). Objetivo: Descrever os estudos de melhor qualidade metodológica que confirmaram o efeito positivo das ultradiluições homeopáticas em plantas. Métodos: Utilizando como fontes de referência as revisões sobre o tema publicadas até 2015, atualizamos os dados adicionando estudos recentes citados na base de dados PubMed. Resultados: Dentre 167 estudos experimentais analisados nas principais revisões, 48 atingiram os critérios mínimos de qualidade metodológica e 29identificaram os efeitos específicos das ultradiluições homeopáticas em plantas, empregando controles adequados. Conclusões: Apesar da qualidade metodológica insatisfatória da maioria dos experimentos, estudos com controle negativo sistemático e reprodutibilidade reportaram efeitos significativos e incontestáveis das ultradiluições homeopáticas em plantas. (AU)
Introduction: Among the non-conventional grounds of homeopathy, the use of medicines in high dilutions is a cause for objections and skepticism among the scientific community, trained within the dose-dependency paradigm of classicpharmacology. Research aiming at evidencing the effects of homeopathic high dilutions has resource to several experimental models (in vitro, in plants and in animals). Aim: To describe the results of studies with high methodological quality that demonstrated positive effects of homeopathic high dilutions on plants. Methods: Taking reviews published until 2015 as reference source, we updated the information through the addition of data in recent studies included in database PubMed. Results: From 167 experimental studies analyzed in the main reviews, 48 met the minimum criteria of methodological quality, from which 29 detected specific effects of homeopathic high dilutions on plants through comparison with adequate controls. Conclusions: Despite the substandard methodological quality of most experiments, studies with systematic use of negative controls and reproducibility demonstrated significant undeniable effectsof homeopathic high dilutions on plants. (AU)
Subject(s)
Agriculture , Homeopathy , High Potencies , Plant Pathology , Methodology as a SubjectABSTRACT
Background: Among the non-conventional assumptions of homeopathy, the use of medicines in high dilutions (HD) is a cause for objections and skepticism among the scientific community, trained within the dose-dependency paradigm of classic pharmacology. Research aiming at evidencing the effects of homeopathic HD has resource to several experimental models (in vitro, plants and animals). Aim: To describe the results of studies with high methodological quality that demonstrated positiveeffects of homeopathic HD on plants. Methods: Taking reviews published until 2015 as reference source, we updated the information through addition of data from recent studies included in database PubMed. Results: From 167 experimental studies analyzed, 48 met the minimum criteria of methodological quality, from which 29 detected specific effects of homeopathic high dilutions on plants through comparison to adequate controls. Conclusions: Despite the substandard methodological quality ofmost experiments, studies with systematic use of negative controls and reproducibility demonstrated significant indisputable effects of homeopathic HD on plants.(AU)
Subject(s)
Homeopathy , Plants , Agriculture , High Potencies , Plant Pathology , Methodology as a SubjectABSTRACT
Introdução: Dentre as premissas não convencionais do modelo homeopático, o emprego de doses ultradiluídas de medicamentos desperta questionamentos e ceticismo na classe científica, acostumada ao paradigma dose-dependente da farmacologia clássica. Para evidenciar o efeito das ultradiluições homeopáticas em seres vivos, pesquisas são realizadas em diversos modelos experimentais (in vitro, em plantas e em animais). Objetivo: Descrever os estudos de melhor qualidade metodológica que confirmaram o efeito positivo das ultradiluições homeopáticas em plantas. Métodos: Utilizando como fontes de referência as revisões sobre o tema publicadas até 2015, atualizamos os dados adicionando estudos recentes citados na base de dados PubMed. Resultados: Dentre 167 estudos experimentais analisados nas principais revisões, 48 atingiram os critérios mínimos de qualidade metodológica e 29identificaram os efeitos específicos das ultradiluições homeopáticas em plantas, empregando controles adequados. Conclusões: Apesar da qualidade metodológica insatisfatória da maioria dos experimentos, estudos com controle negativo sistemático e reprodutibilidade reportaram efeitos significativos e incontestáveis das ultradiluições homeopáticas em plantas. (AU)
Subject(s)
Homeopathy , Plants , Agriculture , High Potencies , Plant Pathology , Methodology as a SubjectABSTRACT
BACKGROUND: Among the non-conventional assumptions of homeopathy, the use of medicines in high dilutions (HD) is a cause for objections and skepticism among the scientific community, trained within the dose-dependency paradigm of classic pharmacology. Research aiming at evidencing the effects of homeopathic HD has resource to several experimental models (in vitro, plants and animals). AIM: To describe the results of studies with high methodological quality that demonstrated positiveeffects of homeopathic HD on plants. METHODS: Taking reviews published until 2015 as reference source, we updated the information through addition of data from recent studies included in database PubMed. RESULTS: From 167 experimental studies analyzed, 48 met the minimum criteria of methodological quality, from which 29 detected specific effects of homeopathic high dilutions on plants through comparison to adequate controls. CONCLUSIONS: Despite the substandard methodological quality ofmost experiments, studies with systematic use of negative controls and reproducibility demonstrated significant indisputable effects of homeopathic HD on plants.
Subject(s)
Homeopathy , Plants , Agriculture , High Potencies , Plant Pathology , Methodology as a SubjectABSTRACT
OBJECTIVES: The objective was to evaluate homeopathic basic research studies that use plant-based bioassays. With this in view, a compilation was made of the findings of three systematic literature reviews covering plant-based bioassays in the three fields of healthy, abiotically, or biotically stressed plants. This compilation focused on investigations using advanced experimental methods and detailed descriptions, also with the aim of supporting the design of future experiments. METHODS: Publications included had to report on studies into the effects of homeopathic preparations on whole plants, seeds, plant parts and cells. Outcomes had to be measured by established procedures and statistically evaluated. A Manuscript Information Score (MIS) was applied using predefined criteria to identify publications with sufficient information for adequate interpretation (MIS ≥ 5). Additional evaluation focused on the use of adequate controls to investigate specific effects of homeopathic preparations, and on the use of systematic negative control (SNC) experiments to ensure the stability of the bioassay. Only a fraction of the studies reported here were performed with 'ultra high' dilutions, whereas other studies were performed with moderate or high dilutions. RESULTS: A total of 157 publications were identified, describing a total of 167 experimental studies. 84 studies included statistics and 48 had a MIS ≥ 5, thus allowing adequate interpretation. 29 studies had adequate controls to identify specific effects of homeopathic preparations, and reported significant effects of decimal and centesimal homeopathic potencies, including dilution levels beyond Avogadro's number. 10 studies reported use of SNC experiments, yielding evidence for the stability of the experimental set-up. CONCLUSION: Plant models appear to be a useful approach for investigating basic research questions relating to homeopathic preparations, but more independent replication trials are needed in order to verify the results found in single experiments. Adequate controls and SNC experiments should be implemented on a routine basis to exclude false-positive results.
