Ariel Iván Ruiz.

Dr. Ariel Iván Ruiz.


Research Focus & Metrics

Academic Career Length

22Years (2005-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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21 July 2022 in Cells
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Julieth Daniela Buell AcostaJulieth Daniela Buell Acosta
Julieth Daniela Buell Acosta
MGMaria Garces
Maria Garces
APArturo José Parada-Baños
Arturo José Parada-Baños
EAEdith Angel-Muller
Edith Angel-Muller
MPMaria Paez-Leal
Maria Paez-Leal
JCJorge Caminos
Jorge Caminos
(1) Background: Fibroblast growth factor 21 (FGF-21) is an endocrine factor involved in glucose and lipid metabolism that exerts pleiotropic effects. The aim of this study was to investigate the serum FGF-21 profile in healthy and mild preeclamptic pregnant women at each trimester of pregnancy; (2) Methods: Serum FGF-21 levels were determined by ELISA in a nested case-control study within a longitudinal cohort study that included healthy (n = 54) and mild preeclamptic (n = 20) pregnant women, women at three months after delivery (n = 20) and eumenorrheic women during the menstrual cycle (n = 20); (3) Results: FGF-21 levels were significantly lower in the mid-luteal phase compared to the early follicular phase of the menstrual cycle in eumenorrheic women (p < 0.01). Maternal levels of FGF-21 were significantly lower in the first and second trimesters and peaked during the third trimester in healthy pregnant women (p < 0.01). Serum levels of FGF-21 in healthy pregnant were significantly lower in the first and second trimester of pregnancy compared with the follicular phase of the menstrual cycle and postpartum (p < 0.01). Serum FGF-21 levels were significantly higher in preeclamptic compared to healthy pregnant women during pregnancy (p < 0.01); (4) Conclusions: These results suggest that a peak of FGF-21 towards the end of pregnancy in healthy pregnancy and higher levels in preeclamptic women might play a critical role that contributes to protecting against the negatives effects of high concentrations of non-esterified fatty acids (NEFA) and hypertensive disorder. Furthermore, FGF-21 might play an important role in reproductive function in healthy eumenorrheic women during the menstrual cycle.

16 May 2014 in Cochrane Database of Systematic Reviews
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CGCarlos Fernando Grillo-Ardila
Carlos Fernando Grillo-Ardila
ARAriel Iván Ruiz.
Ariel Iván Ruiz.
HGHernando G Gaitán
Hernando G Gaitán
NRNelcy Rodriguez-Malagon
Nelcy Rodriguez-Malagon
Background Retained placenta affects 0.5% to 3% of women following delivery and it is a major cause of maternal death due to postpartum haemorrhage. Usually, retained placenta has been managed by manual removal or curettage under anaesthesia, which may be associated with haemorrhage, infection and uterine perforation. Medical management to facilitate the delivery of the retained placenta could be a safe alternative avoiding surgical intervention. Objectives To assess the effectiveness and safety of prostaglandins for the management of retained placenta. Search methods We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (1 December 2013), LILACS (1982 to 1 December 2013), SciELO (1998 to 1 December 2013), Web of Science (2001 to 1 December 2013), openSIGLE (1997 to 1 December 2013), World Health Organization International Clinical Trials Registry Platform (ICTRP) (1 December 2013) and the metaRegister of Controlled Trials (mRCT) (1 December 2013). We also contacted authors of included studies and reviewed the reference lists of retrieved studies. Selection criteria Randomised controlled clinical trials comparing the use of prostaglandins (or prostaglandin analogues) with placebo, expectant management, tocolytic drugs, any other prostaglandins or surgical interventions for the management of retained placenta after vaginal delivery of singleton live infants of 20 or more weeks of gestation. Data collection and analysis Two review authors independently assessed trials for inclusion and assessed trial quality. Two review authors independently extracted data. Data were checked for accuracy. Any disagreements were resolved through consensus or consultation with a third review author when required. Authors of the included studies were contacted for additional information. Main results We included three trials, involving 244 women. The studies were considered to be at high risk of bias. The prostaglandins used were PG E2 analogue (sulprostone) in 50 participants and PG E1 analogue (misoprostol) in 194 participants at a dose of 250 mcg and 800 mcg respectively. The prostaglandins compared with placebo, were not superior in reducing the rate of manual removal of placenta (average risk ratio (RR) 0.82; 95% confidence interval (CI) 0.54 to 1.27), severe postpartum haemorrhage (RR 0.80; 95% CI 0.55 to 1.15), need for blood transfusion (RR 0.72; 95% CI 0.43 to 1.22), mean blood loss (mean difference (MD) ‐205.26 mL; 95% CI ‐536.31 to 125.79, random‐effects) and the mean time from injection to placental removal (MD ‐7.00 minutes; 95% CI ‐21.20 to 7.20). Side‐effects were no different between groups (vomiting, headache, pain and nausea between injection and discharge from the labour ward), with the exception of shivering, which was more frequent in women receiving prostaglandins (RR 10.00; 95% CI 1.40 to 71.49). We did not obtain any data for the primary outcomes of maternal mortality and the need to add another therapeutic uterotonic. Authors' conclusions Currently there is limited, very low‐quality evidence relating to the effectiveness and the safety using prostaglandins for the management of retained placenta. Use of prostaglandins resulted in less need for manual removal of placenta, severe postpartum haemorrhage and blood transfusion but none of the differences reached statistical significance. Much larger, adequately powered studies are needed to confirm that these clinically important beneficial effects are not just chance findings. Similarly, no differences were detected between prostaglandins and placebo in mean blood loss or the mean time from injection to placental removal (minutes) or side‐effects (vomiting, headache, pain and nausea between injection and discharge from the labour ward) except for 'shivering' which was more frequent in women who received prostaglandin. The included studies were of poor quality and there is little confidence in the effect estimates; the true effect is likely to be substantially different. We can not make any recommendations about changes to clinical practice. More high‐quality research in this area is needed.

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MGMaria Garces
Maria Garces
Julieth Daniela Buell AcostaJulieth Daniela Buell Acosta
Julieth Daniela Buell Acosta
EÁEdith Ángel-Müller
Edith Ángel-Müller
APArturo José Parada-Baños
Arturo José Parada-Baños
JAJaidy Acosta-Alvarez
Jaidy Acosta-Alvarez
JCJorge Caminos
Jorge Caminos
The Liver-Expressed Antimicrobial Peptide 2 (LEAP-2) has emerged as an endogenous GHS-R antagonist and blunts the orexigenic action of ghrelin. This study aimed to determine the Ghrelin/LEAP-2 ratio in humans and rats during pregnancy. In humans, we conducted a nested case-control study within an observational prospective cohort. Healthy and mild preeclamptic pregnant women were studied at each trimester of gestation and three months postpartum. In addition, a group of non-pregnant women was studied into the follicular and luteal phases of the menstrual cycle. Furthermore, Ghrelin/LEAP-2 ratio was investigated in non-pregnant rats and at different periods of rat pregnancy. Human and rat serum ghrelin and LEAP-2 levels were determined using the commercially available ELISA kits. The Ghrelin/LEAP-2 ratio peak around the second trimester of gestation in healthy pregnant women (p < 0.05). Additionally, there were no statistically significant differences in Ghrelin/LEAP-2 ratio between healthy and preeclamptic pregnant women at each trimester of gestation (p > 0.05). The Ghrelin/LEAP-2 ratio in pregnant rat reached the peak around mid-gestation with a similar pattern to the human pregnancy. LEAP-2 was visualized by immunohistochemistry in human term placenta and rat placentas on days 12, 16 and 21 of pregnancy. In conclusion, this study provides the first evidence of a Ghrelin/LEAP-2 ratio peak around the half-way point of pregnancy onwards during human and rat pregnancy, and it might be associated with increased rates of weight gain during pregnancy. Thus, this study suggests that LEAP-2 and Ghrelin/LEAP-2 ratio might play an important role in maternal physiology adaptation of weight gain during pregnancy.

30 September 2006 in Revista Colombiana de Obstetricia Y Ginecologia
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RSRuth Mélida Sánchez
Ruth Mélida Sánchez
ARAriel Iván Ruiz.
Ariel Iván Ruiz.
OOOlga Lucía Ostos-Ortiz
Olga Lucía Ostos-Ortiz
Introducción: la Chlamydia trachomatis (CT) es considerada hoy como la causa más frecuente de infecciones de transmisión sexual y enfermedad pélvica inflamatoria. Aproximadamente la mitad de los casos de infección por Chlamydia trachomatis cursan en forma asintomática lo que dificulta su detección clínica temprana y aumenta la probabilidad de secuelas a largo plazo.Objetivo: determinar la prevalencia de infección por C. trachomatis en un grupo de mujeres jóvenes con y sin leucorrea en Bogotá, Colombia.Metodología: estudio de corte transversal en el que se investigó por la técnica de reacción en cadena de la polimerasa la presencia de C. trachomatis en 355 muestras de orina obtenidas de mujeres jóvenes con o sin leucorrea. Las muestras fueron recolectadas en dos instituciones de primer nivel de la Secretaría Distrital de Salud y en dos instituciones públicas de educación superior, durante los meses de junio y julio del 2004. Se investigaron variables sociodemográficas de interés y prácticas anticonceptivas.Resultados: se detectaron 19 muestras positivas, de las cuales 5 correspondían a mujeres sin leucorrea y 14 a pacientes con leucorrea. La prevalencia de infección fue 5,35% (IC 95% 3,25-8.23) en el grupo total, 2,86% (IC 95% 0,93-6,54) en las mujeres sin leucorrea y 7,78% (IC 95% 4,31-12,70) en las pacientes con leucorrea.Conclusión: la prevalencia encontrada en este estudio indica que la infección por C. trachomatis constituye un problema de interés en salud pública. Aunque la leucorrea puede considerarse como un marcador de infección por Chlamydia, dada la tendencia a mayor frecuencia en este grupo de pacientes, la prevalencia en mujeres asintomáticas fue importante y justifica ofrecer su detección en forma más amplia.

1 July 2005 in Revista de Salud Pública
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YCYolanda Cifuentes
Yolanda Cifuentes
ARAriel Iván Ruiz.
Ariel Iván Ruiz.
ALAura Lucia Leal
Aura Lucia Leal
LMLiliana Muñoz
Liliana Muñoz
MHMaria Herrera
Maria Herrera
LJLuz Jiménez
Luz Jiménez
Investigating the prevalence and sensitivity of germs isolated from newborn in a referral hospital in Bogotá. Suggesting an empirical antibiotic treatment for neonatal infection. Cultures taken between February and December 2002 were analysed. Blood cultures were processed using BacT/ALERT (Durham, NC), urine cultures by UROCULT (Bio-Bacter) and catheter tips in thioglycollate. BBL CRYSTAL identification system (BD, Sparks, MD) was used for identifying germs. Antibiotic sensitivity was determined by disk diffusion. There were 1,097 positive aerobic and facultative aerobic germ cultures; 64.3% were Gram-positive, 30.6% Gram-negative and 4.9% were yeasts. Gram-positive germs consisted of coagulase-negative staphylococci (64.2%), enterococcus (13.8%) and coagulase-positive staphylococci (13.3%). The most frequent Gram-negatives were Klebsiella (45.2%), Eschericha coli (30.9%) and Serratia (10.1%). Staphylococcus epidermidis accounted for 64% of the coagulase-negative staphylococci. S. epidermidis susceptibility to vancomycin was 100%. Coagulase-negative staphylococci susceptibility to rifampin and amikacin was 59% and 67.4% (respectively). Coagulase-negative staphylococci resistance to beta-lactams was 86.4% (95% CI: 82.3-89.9). Coagulase-positive staphylococci sensitivity to vancomycin was 100%. Gram-negative susceptibility to imipenem was 98.1% (95% CI: 89.9-99.9), 78.1% to gentamicin (95% CI: 64.9-88.2) and 46.6% to amikacin (95% CI: 28.3-65.7). There was high coagulase-negative staphylococci prevalence in neonatal infection (particularly S. epidermidis). All S. epidermidis and coagulase-positive staphylococci were sensitive to vancomycin. There was increasing coagulase-negative staphylococci and Gram-negative resistance to oxacillin and amikacin, respectively.

1 July 2025 in Medicina y Ética
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JSJorge Augusto Moncaleano Sáenz
Jorge Augusto Moncaleano Sáenz
MSMartha Patricia Rodríguez Sánchez
Martha Patricia Rodríguez Sánchez
CFCatalina Hernández Flórez
Catalina Hernández Flórez
CRCarlos Gómez Restrepo
Carlos Gómez Restrepo
ARAriel Iván Ruiz.
Ariel Iván Ruiz.
CGCamilo Alberto González González
Camilo Alberto González González
Este estudio investigó el conocimiento, aplicabilidad y barreras relacionadas con el documento de voluntades anticipadas (DVA) en profesionales de la salud del Hospital Universitario San Ignacio, Bogotá, Colombia, aplicando encuestas cuantitativas que posteriormente serán seguidas de entrevistas semi estructuradas para evaluar la comprensión y experiencias de médicos respecto al DVA. Los resultados mostraron que el 79.2% de los participantes reconocen la importancia de planificar deseos médicos, y el 92.5% sabe que los médicos deben respetar el DVA por ley. Sin embargo, solo el 75% lo recomendaría y solo el 67.9% conoce la obligación moral de transferir el caso a otro profesional si no quieren seguir la voluntad del paciente. Se identificó una brecha en el conocimiento del proceso y barreras como la falta de tiempo y entrenamiento en comunicación. Los hallazgos subrayan la necesidad de mejorar la capacitación y recursos para incorporar el DVA en la práctica clínica.