Endolysosomal trafficking controls yolk granule biogenesis in vitellogenic Drosophila oocytes.

Endocytosis and endolysosomal trafficking are essential for almost all aspects of physiological functions of eukaryotic cells. As our understanding on these membrane trafficking events are mostly from studies in yeast and cultured mammalian cells, one challenge is to systematically evaluate the findings from these cell-based studies in multicellular organisms under physiological settings. One potentially valuable in vivo system to address this challenge is the vitellogenic oocyte in Drosophila, which undergoes extensive endocytosis by Yolkless (Yl), a low-density lipoprotein receptor (LDLR), to uptake extracellular lipoproteins into oocytes and package them into a specialized lysosome, the yolk granule, for storage and usage during later development. However, by now there is still a lack of sufficient understanding on the molecular and cellular processes that control yolk granule biogenesis. Here, by creating genome-tagging lines for Yl receptor and analyzing its distribution in vitellogenic oocytes, we observed a close association of different endosomal structures with distinct phosphoinositides and actin cytoskeleton dynamics. We further showed that Rab5 and Rab11, but surprisingly not Rab4 and Rab7, are essential for yolk granules biogenesis. Instead, we uncovered evidence for a potential role of Rab7 in actin regulation and observed a notable overlap of Rab4 and Rab7, two Rab GTPases that have long been proposed to have distinct spatial distribution and functional roles during endolysosomal trafficking. Through a small-scale RNA interference (RNAi) screen on a set of reported Rab5 effectors, we showed that yolk granule biogenesis largely follows the canonical endolysosomal trafficking and maturation processes. Further, the data suggest that the RAVE/V-ATPase complexes function upstream of or in parallel with Rab7, and are involved in earlier stages of endosomal trafficking events. Together, our study provides s novel insights into endolysosomal pathways and establishes vitellogenic oocyte in Drosophila as an excellent in vivo model for dissecting the highly complex membrane trafficking events in metazoan.

Clinical Cases of Coccidioidomycosis in the Americas in the Period 1950-2021: Epidemiology Data, Diagnosis, and Treatment.

Coccidioidomycosis, caused by Coccidioides immitis and C. posadasii, causes significant morbidity and mortality, both in immunocompetent and immunocompromised people, mainly in endemic areas. The present work analyzed its epidemiology, diagnostic methods, and treatment by reviewing clinical cases published from 1950 to 2021. Fifty-nine articles were included, corresponding to 275 clinical cases. The results showed a higher incidence of coccidioidomycosis in the male gender than the female gender. The most affected age group was 31-40 years, and the most reported clinical presentation was disseminated with greater involvement in cutaneous and subcutaneous tissue, followed by the CNS, bone system, and peritoneum. The species most frequently reported was C. immitis. The most used treatment was azoles, followed by their combination with amphotericin B, monotherapy with amphotericin B, and alternative medicine. This work shows that epidemiological data outside the USA are still scarce. Serological tests are the preferred diagnostic method in daily medical practice, and cultures remain the gold standard. The treatment for coccidioidomycosis is ketoconazole and amphotericin B, individually or in combination.

Rabies virus in white-nosed coatis (Nasua narica) in Mexico: what do we know so far?

Rabies is a neglected disease that affects all mammals. To determine the appropriate sanitary measures, the schedule of preventive medicine campaigns requires the proper identification of the variants of the virus circulating in the outbreaks, the species involved, and the interspecific and intraspecific virus movements. Urban rabies has been eradicated in developed countries and is being eradicated in some developing countries. In Europe and North America, oral vaccination programs for wildlife have been successful, whereas in Latin America, Asia, and Africa, rabies remains a public health problem due to the habitation of a wide variety of wild animal species that can act as rabies virus reservoirs in their environment. After obtaining recognition from the WHO/PAHO as the first country to eliminate human rabies transmitted by dogs, Mexico faces a new challenge: the control of rabies transmitted by wildlife to humans and domestic animals. In recent years, rabies outbreaks in the white-nosed coati (Nasua narica) have been detected, and it is suspected that the species plays a significant role in maintaining the wild cycle of rabies in the southeast of Mexico. In this study, we discussed cases of rabies in white-nosed coatis that were diagnosed at InDRE (in English: Institute of Epidemiological Diagnosis and Reference; in Spanish: Instituto de Diagnostico y Referencia Epidemiologicos) from 1993 to 2022. This study aimed to determine whether white-nosed coatis might be an emergent rabies reservoir in the country. A total of 13 samples were registered in the database from the Rabies laboratories of Estado de Mexico (n = 1), Jalisco (n = 1), Quintana Roo (n = 5), Sonora (n = 1), and Yucatan (n = 5). Samples from 1993 to 2002 from Estado de Mexico, Jalisco, and Sonora were not characterized because we no longer had any samples available. Nine samples were antigenically and genetically characterized. To date, coatis have not been considered important vectors of the rabies virus. The results from our research indicate that the surveillance of the rabies virus in coatis should be relevant to prevent human cases transmitted by this species.

Phenotypic and Genotypic Identification of Dermatophytes from Mexico and Central American Countries.

Dermatophytes are fungi included in the genera Trichophyton, Microsporum, Epidermophyton, Nannizzia, Paraphyton, Lophophyton, and Arthroderma. Molecular techniques have contributed to faster and more precise identification, allowing significant advances in phylogenetic studies. This work aimed to identify clinical isolates of dermatophytes through phenotypic (macro- and micromorphology and conidia size) and genotypic methods (sequences of ITS regions, genes of ß tubulin (BT2), and elongation factor α (Tef-1α)) and determine the phylogenetic relationships between isolates. Ninety-four dermatophyte isolates from Costa Rica, Guatemala, Honduras, Mexico, and the Dominican Republic were studied. The isolates presented macro- and micromorphology and conidia size described for the genera Trichophyton, Microsporum, and Epidermophyton. Genotypic analysis classified the isolates into the genera Trichophyton (63.8%), Nannizzia (25.5%), Arthroderma (9.6%), and Epidermophyton (1.1%). The most frequent species were T. rubrum (26 isolates, 27.6%), T. interdigitale (26 isolates, 27.6%), and N. incurvata (11 isolates, 11.7%), N. gypsea and A. otae (nine isolates, 9.6%), among others. The genotypic methods clarified the taxonomic status of closely related species. For instance, the ITS and BT2 markers of T. rubrum/T. violaceum did not differ but the Tef-1α gene did. On the other hand, the three markers differed in T. equinum/T. tonsurans. Therefore, the ITS, BT2, and Tef-1α genes are useful for typing in phylogenetic analyses of dermatophytes, with Tef-1α being the most informative locus. It should be noted that isolate MM-474 was identified as T. tonsurans when using ITS and Tef-1α, but when using BT2, it was identified as T. rubrum. On the other hand, no significant difference was found when comparing the methods for constructing phylogenies, as the topologies were similar.

Rabies Virus Variants Detected from Cougar (Puma concolor) in Mexico 2000-2021.

In 2019, the World Health Organization (WHO) and the Pan-American Health Organization (PAHO) recognized Mexico as a country free of human rabies transmitted by dogs. Nevertheless, the sylvatic cycle remains as a public health concern in the country. Although cougars (Puma concolor) are not reservoirs of any rabies virus variant (RVV), these felines could act as vectors at the top of the food chain, and their relationships with other organisms must be considered important for the regulatory effect on their prey's populations. In this study, genetic and antigenic characterization was performed on all cougar rabies cases diagnosed at the Rabies Laboratory Network of the Ministry of Health (RLNMH) in Mexico from 2000 to 2021. Samples from other species, a skunk, a horse (Equus caballus) (attacked by a cougar), and a gray fox (Urocyon cineroargenteus), were included as reference. Rabies cases in cougars were restricted to two Northern states of Mexico (Sonora and Chihuahua). Five out of six samples of cougars were RVV7 (Arizona gray fox RVV) and one from Sonora was RVV1. Interestingly, there is no evidence of RVV1 in dogs in the Northern states since the 1990s but skunk species now harbor this RVV1 in this region of the country.

Impressions of aquatic therapy treatment in children with prolonged mechanical ventilation - clinician and family perspectives: a qualitative case study.

PURPOSE: To describe the experiences of applying aquatic therapy (AT) to children with ventilation needs after discharge from the paediatric intensive care unit (PICU). MATERIAL AND METHODS: A qualitative and descriptive case study with integrated units. Purposive sampling was carried out, including the parents of the children participating in the AT programme and the healthcare professionals treating them. Fourteen participants were included: four parents, five physicians, three physiotherapists and two nurses. The study was carried out as part of a program on AT in critically ill children. Semi-structured interviews were conducted. A thematic analysis was performed. RESULTS: Three themes were identified. Theme (1) Difficulties for implementation: AT was not perceived as a viable therapeutic modality; lack of knowledge and resources. Theme (2) Risks and challenges: Perceptions of anxiety at the beginning; planning and precautions. Theme (3) AT facilitates new possibilities and benefits: The necessity of the presence of parents during the AT session; a sense of "normalcy;" outcomes of AT in relation to post-intensive care syndrome. CONCLUSIONS: Our results will help to better understand a safe and feasible way to work with children with PPMV, even though this approach is not yet widespread due to its special circumstances. These results can be used in future AT programmes in children undergoing special treatments.IMPLICATIONS FOR REHABILITATIONChildren with ventilation needs after discharge from the intensive care unit present physical, cognitive, and mental alterations that decrease functional capacity and quality of life.In a relatively small sample, positive outcomes were found for AT in relation to post-intensive care syndrome, enabling children to participate in aquatic therapy activities with the involvement of parents.This study highlighted the positive impact on the quality of life of both children and their parents.Aquatic therapy is a feasible intervention in children requiring prolonged mechanical ventilation, although certain difficulties should be addressed in terms of implementation, together with challenges regarding safety and planning.These difficulties may be overcome by promoting coordination between professionals, creating security protocols, and/or facilitating specialised education for therapists.

Genome Sequence of a Rabies Virus Isolated from a Dog in Chiapas, Mexico, 2013.

Rabies virus (RABV), a member of the genus Lyssavirus, causes encephalitis that is almost always fatal following the onset of clinical signs. Here, we report the complete codifying sequence of an RABV isolated from a dog in Mexico. Molecular data showed that this strain belongs to the Chiapas lineage.

Implementation of the ECHO® telementoring model for the treatment of patients with hepatitis C.

We aimed to implement the Extension for Community Healthcare Outcomes (ECHO) telementoring model for hepatitis C and to evaluate its outcomes in the health providers. Following the ECHO model, an hepatitis C teleECHO clinic was established at the Hospital Italiano in Argentina. The teleECHO clinic provides support and training to physicians from Patagonia who treat patients with hepatitis C. In order to evaluate the teleECHO clinic outcomes, physicians completed a survey focused on skills and competence in hepatitis C before and after 6 months of participating in the project. The survey consisted of 10 questions, which participants rated from 1 to 7 (1 no ability; 7 highest ability). To analyze the difference before and after participation in the project, Wilcoxon signed-rank test was used. During the first 6 months of implementation of the model, a total of 14 physicians from 12 sites in Patagonia agreed to participate in the survey. The median age of the participants was 42 years. Participants' primary specialties were Hepatology (55%), Infectious Diseases (25%), General Practice (10%), and other (10%). A significant improvement was observed in all the evaluated fields after 6 month of the participation in the teleECHO clinic, namely fibrosis staging, determining appropriate candidates for treatment, and selecting appropriate HCV treatment. In addition, their general interest in hepatitis C increased. We successfully replicated and implemented the first teleECHO clinic in Argentina. Physicians improved their ability to provide best practice care for patients with Hepatitis C. J. Med. Virol. 89:660-664, 2017. © 2016 Wiley Periodicals, Inc.

Fluorescence in situ hybridization of TP53 for the detection of chromosome 17 abnormalities in myelodysplastic syndromes.

Conventional G-banding cytogenetics (CC) detects chromosome 17 (chr17) abnormalities in 2% of patients with de novo myelodysplastic syndromes (MDS). We used CC and fluorescence in situ hybridization (FISH) (LSI p53/17p13.1) to assess deletion of 17p in 531 patients with de novo MDS from the Spanish Group of Hematological Cytogenetics. FISH detected - 17 or 17p abnormalities in 13 cases (2.6%) in whom no 17p abnormalities were revealed by CC: 0.9% of patients with a normal karyotype, 0% in non-informative cytogenetics, 50% of patients with a chr17 abnormality without loss of 17p and 4.7% of cases with an abnormal karyotype not involving chr17. Our results suggest that applying FISH of 17p13 to identify the number of copies of the TP53 gene could be beneficial in patients with a complex karyotype. We recommend using FISH of 17p13 in young patients with a normal karyotype or non-informative cytogenetics, and always in isolated del(17p).

A bisphosphonite calix[5]arene ligand that stabilizes η6 arene coordination to palladium.

Treatment of a bis(phenylphosphonite)calix[5]arene ligand with either palladium(II) chloride or 1,5-cyclooctadieneplatinum(II) chloride yields square planar metal complexes in which the two phosphorus atoms bind cis to the MCl(2) moiety (M = Pd, Pt). Chloride was removed from the palladium complex to open a coordination site at the metal for catalysis. The chloride removal resulted in a rare and unexpected η(6) coordination of an arene to the metal. The reaction is reversible upon addition of tetra-n-butyl ammonium chloride.

The response of vocal fold fibroblasts and mesenchymal stromal cells to vibration.

Illumination of cellular changes caused by mechanical forces present within the laryngeal microenvironment may well guide strategies for tissue engineering the vocal fold lamina propria. The purpose of this study was to compare the response of human vocal fold fibroblasts (hVFF) and bone marrow mesenchymal stem cells (BM-MSC) to vibratory stimulus. In order to study these effects, a bioreactor capable of vibrating two cell seeded substrates was developed. The cell seeded substrates contact each other as a result of the sinusoidal frequency, producing a motion similar to the movement of true vocal folds. Utilizing this bioreactor, hVFF and BM-MSC were subjected to 200 Hz vibration and 20% strain for 8 hours. Immunohistochemistry (Ki-67 and TUNEL) was performed to examine cell proliferation and apoptosis respectively, while semi-quantitative RT-PCR was used to assess extracellular matrix related gene expression. HVFF significantly proliferated (p = 0.011) when subjected to 200 Hz vibration and 20% strain, while BM-MSC did not (p = 1.0). A statistically significant increase in apoptosis of BM-MSC (p = 0.0402) was observed under the experimental conditions; however high cell viability (96%) was maintained. HVFF did not have significantly altered apoptosis (p = 0.7849) when subjected to vibration and strain. Semi-quantitative RT-PCR results show no significant differences in expression levels of collagen I (BM-MSC p = 0.1951, hVFF p = v0.3629), fibronectin (BM-MSC p = 0.1951, hVFF p = 0.2513), and TGF-ß1 (BM-MSC p = 0.2534, hVFF p = 0.6029) between vibratory and static conditions in either cell type. Finally, smooth muscle actin mRNA was not present in either vibrated or static samples, indicating that no myofibroblast differentiation occurred for either cell type. Together, these results demonstrate that BM-MSC may be a suitable alternative to hVFF for vocal fold tissue engineering. Further investigation into a larger number of gene markers, protein levels, increased number of donors and vibratory conditions are warranted.

Etiology of hepatocellular carcinoma in Argentina: results of a multicenter retrospective study.

Incidence and etiology of hepatocellular carcinoma (HCC) are variable around the world, depending mainly on theprevalence ofchronic hepatitis B carriers in each region. No study has been published analyzing epidemiological features of patients with HCC in Argentina. The aim of this retrospective study was to describe demographical and etiological results in a series of 587 consecutive patients with HCC diagnosed in 15 Hepatology and Gastroenterology Units distributed all around our country. Seventy-two per cent of patients were male, the median age was 62 years (interquartile range 55-68 years), and 93% had cirrhosis. Regarding to etiological data (fully available in 551 cases), main etiologies were chronic alcoholism in 229 patients (41.6%) (the sole risk factor in 182, associated to HCVin 35 and to HBV in 12); hepatitis C in 223 patients (40.5%) (the sole risk factor in 181, associated to alcoholism in 35 and to HBV in 7); hepatitis B in 74 patients (13.4%) (the sole risk factor in 55, associated to alcoholism in 12 and to HCV in 7); cryptogenic cirrhosis in 51 patients (9.2%). There were significant differences in percentages of genders between main groups: males were highly predominant in alcoholic cirrhosis (93%), hepatitis B (87%) and HCV plus alcohol (94%), compared to 63% in cryp togenic cirrhosis and 49% in hepatitis C (p<0.01). There were no differences in age at presentation between the main etiologies. In conclusion, the main causes of HCC in Argentina are alcoholic cirrhosis and hepatitis C (76% of cases). A majority of patients with HCC in our country are cirrhotics, males, and in their 6th or -7th decades of life.

[Abviser Kit intra-abdominal pressure monitoring]. / El Kit de Abviser. Monitorización de la presión intraabdominal.

The authors explain what an Abviser Kit consists of as an appropriate technique to measure intra-abdominal pressure, especially for patients in critical condition who have a depressed immune system since this deals with a closed system which prevents the movements a bladder catheter causes. This method minimizes the risk of infection, shortening hospital stays.

El Kit de AbviserTM. Monitorización de la presión intraabdominal / Abviser kitTM. Intra-abdominal pressure monitoring

Se explica en qué consiste el Kit de AbviserTM como una técnica acertada para medir la presión intraabdominal (PIA), sobre todo en pacientes en estado crítico con sistema inmunodeprimido, ya que se trata de un sistema cerrado que impide las manipulaciones de la sonda vesical. Ello supone minimizar los riesgos de infección, acortando las estancias en el medio hospitalario(AU)

The authors explain what an Abviser KitTM consists of as an appropriate technique to measure intra-abdominal pressure, especially for patients in critical condition who have a depressed immune system since this deals with a closed system which prevents the movements a bladder catheter causes. This method minimizes the risk of infection, shortening hospital stays(AU)

A new nitrilase from Bradyrhizobium japonicum USDA 110. Gene cloning, biochemical characterization and substrate specificity.

A nitrilase gene blr3397 from Bradyrhizobium japonicum USDA110 was cloned and over-expressed in Escherichia coli, and the encoded protein was purified to give a nitrilase with a single band of about 34.5kD on SDS-PAGE. The molecular weight of the holoenzyme was about 340kD as determined by light scattering analysis, suggesting that nitrilase blr3397 self-aggregated to an active form with the native structure being a decamer. The V(max) and K(m) for phenylacetonitrile were 3.15U/mg and 4.36mM, respectively. The catalytic constant k(cat) and specificity constant k(cat)/K(m) were 111min(-1) and 2.6x10(4)min(-1)M(-1). This nitrilase is most active toward the hydrolysis of hydrocinnamonitrile among the tested substrates (4.3 times that of phenylacetonitrile). The nitrilase blr3397 shows higher activity towards the hydrolysis of aliphatic nitriles than that for the aromatic counterparts, and can be characterized as an aliphatic nitrilase in terms of activity. This nitrilase also possesses distinct features from the nitrilase bll6402 of the same microbe.

Purinergic receptor regulation of LPS-induced signaling and pathophysiology.

Macrophages express several lipopolysaccharide (LPS) binding proteins and are potently activated by LPS to produce inflammatory mediators. Recent studies have shown that receptors for exogenous nucleotides (P2X and P2Y purinergic receptors) can modulate macrophage production of TNF-alpha, IL-1beta and nitric oxide (NO) following LPS exposure. Macrophages and LPS-stimulated monocytes express elevated levels of P2Y1, P2Y2 and P2X7 mRNA, suggesting that both P2Y and P2X receptors can contribute to LPS-induced pathophysiology. In addition, oxidized-ATP treatment (which inhibits P2X7) of macrophages blocks LPS-induced NO production, NF-kappaB and ERK-1/2 activation. Also, an LPS-binding domain located in the P2X7 C-terminus appears important for receptor trafficking/function. Moreover, the purinergic receptor ligand 2-MeS-ATP attenuates LPS-induced cytokine and NO production in vivo and ex vivo. These data suggest that P2X7 and certain P2Ys are linked to LPS effects, although their relative contribution in vivo is unclear. Accordingly, we tested the capacity of several adenine nucleotides to modulate LPS-induced mortality in mice. We found that the P2X7-directed ligand BzATP was unable to prevent LPS-induced death, whereas 2-MeS-ATP and 2-Cl-ATP, which bind to multiple P2X and P2Y receptors were able to protect mice from LPS-induced death. These data suggest that the co-ordinate action of P2Y and P2X7 receptors are critical for controlling LPS responses in vivo and that agents directed against both receptor classes may provide the greatest therapeutic advantage.

Infecciones durante la internación de pacientes con cirrosis hepática / Infections during the hospitalization of patients with liver cirrhosis

Se estudiaron retrospectivamente las Historias Clínicas de 291 pacientes con cirrosis hepática internados (etiología alcohólica en el 95//), de los cuales 114 presentaron episodios de infección con 155 episodios en 144 hospitalizaciones. En comunicación previa observamos que la infección fue el cuarto motivo de ingreso y la principal causa de muerte. La incidencia fue mayor en el sexo femenino. Al momento del diagnóstico: 57// correspondía al Child C; 30// presentaron sepsis y 22// fueron de adquisición intrahospitalaria. Las infecciones más frecuentes fueron la P.B.E. y las pulmonares. Se obtuvo documentación bacteriológica en el 55// de los episódios con predominio de bacilos gramnegativos (E. coli), con alta frecuencia relativa de neumococos. Las complicaciones estuvieron relacionadas con la insuficiencia hepática. La mortalidad global fue del 27.1//, mientras que en las intrahospitalarias fue del 42.1// y los pacientes con Child C, 40.9//. Las bacteriemias sin foco y las P.B.E. presentaron la mayor mortalidad. La sobrevida global fue del 42// a los 2 años y del 18// a los 5 años. En conclusión, destacamos la importancia de investigar la presencia de infección en forma sistemática en los pacientes cirróticos con encefalopatía y/o insuficiencia renal sin causa que las justifique (AU)

Infecciones durante la internación de pacientes con cirrosis hepática / Infections during the hospitalization of patients with liver cirrhosis

Se estudiaron retrospectivamente las Historias Clínicas de 291 pacientes con cirrosis hepática internados (etiología alcohólica en el 95//), de los cuales 114 presentaron episodios de infección con 155 episodios en 144 hospitalizaciones. En comunicación previa observamos que la infección fue el cuarto motivo de ingreso y la principal causa de muerte. La incidencia fue mayor en el sexo femenino. Al momento del diagnóstico: 57// correspondía al Child C; 30// presentaron sepsis y 22// fueron de adquisición intrahospitalaria. Las infecciones más frecuentes fueron la P.B.E. y las pulmonares. Se obtuvo documentación bacteriológica en el 55// de los episódios con predominio de bacilos gramnegativos (E. coli), con alta frecuencia relativa de neumococos. Las complicaciones estuvieron relacionadas con la insuficiencia hepática. La mortalidad global fue del 27.1//, mientras que en las intrahospitalarias fue del 42.1// y los pacientes con Child C, 40.9//. Las bacteriemias sin foco y las P.B.E. presentaron la mayor mortalidad. La sobrevida global fue del 42// a los 2 años y del 18// a los 5 años. En conclusión, destacamos la importancia de investigar la presencia de infección en forma sistemática en los pacientes cirróticos con encefalopatía y/o insuficiencia renal sin causa que las justifique

Inhibición de rosetas E en la enfermedad hepática alcohólica / E rosette inhibition in alcoholic liver disease

Hemos estudiado la formación de Rosetas E y su inhibición en pacientes alcoholistas crónicos, con y sin cirrosis hepática. Los individuos fueron separados en 3 grupos: normales (n=21); alcoholistas sin lesión hepática (n=15) y alcoholistas con cirrosis (n=26). Se realizaron Test de Inhibición de Rosetas E, utilizando suero de los individuos en estudio, enfrentados con linfocitos de individuos sanos, efectuando 4 ensayos simultáneos: I.I. -S/A; I.I. -C/A; I.E. -S/A y I.E. -C/A. Analizados estadísticamente los resultados, observamos diferencias altamente significativas entre los pacientes con cirrosis y los controles, así como entre los cirróticos y los alcoholistas sin lesión hepática. Los ensayos que utilizaron la I.E. fueron los más eficientes para discriminar los grupos de individuos en estudio, siendo los que utilizan el suero no absorbido, los de mejor diferenciación. Con esta técnica observamos que 20/21 de los individuos control presentan inhibición inferior al 15//, y que todos los individuos con inhibición superior al 30// fueron cirróticos con sólo 2 excepciones. Proponemos la existencia de factores solubles en suero que provocan inhibición de la formación de rosetas E (AU)

Inhibición de rosetas E en la enfermedad hepática alcohólica / E rosette inhibition in alcoholic liver disease

Hemos estudiado la formación de Rosetas E y su inhibición en pacientes alcoholistas crónicos, con y sin cirrosis hepática. Los individuos fueron separados en 3 grupos: normales (n=21); alcoholistas sin lesión hepática (n=15) y alcoholistas con cirrosis (n=26). Se realizaron Test de Inhibición de Rosetas E, utilizando suero de los individuos en estudio, enfrentados con linfocitos de individuos sanos, efectuando 4 ensayos simultáneos: I.I. -S/A; I.I. -C/A; I.E. -S/A y I.E. -C/A. Analizados estadísticamente los resultados, observamos diferencias altamente significativas entre los pacientes con cirrosis y los controles, así como entre los cirróticos y los alcoholistas sin lesión hepática. Los ensayos que utilizaron la I.E. fueron los más eficientes para discriminar los grupos de individuos en estudio, siendo los que utilizan el suero no absorbido, los de mejor diferenciación. Con esta técnica observamos que 20/21 de los individuos control presentan inhibición inferior al 15//, y que todos los individuos con inhibición superior al 30// fueron cirróticos con sólo 2 excepciones. Proponemos la existencia de factores solubles en suero que provocan inhibición de la formación de rosetas E