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1.
Bull World Health Organ ; 102(6): 389-399, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38812803

RESUMEN

Objective: To determine whether adding urine culture to urinary tract infection diagnosis in pregnant women from refugee camps in Lebanon reduced unnecessary antibiotic use. Methods: We conducted a prospective, cross-sectional study between April and June 2022 involving pregnant women attending a Médecins Sans Frontières sexual reproductive health clinic in south Beirut. Women with two positive urine dipstick tests (i.e. a suspected urinary tract infection) provided urine samples for culture. Bacterial identification and antimicrobial sensitivity testing were conducted following European Committee on Antimicrobial Susceptibility Testing guidelines. We compared the characteristics of women with positive and negative urine culture findings and we calculated the proportion of antibiotics overprescribed or inappropriately used. We also estimated the cost of adding urine culture to the diagnostic algorithm. Findings: The study included 449 pregnant women with suspected urinary tract infections: 18.0% (81/449) had positive urine culture findings. If antibiotics were administered following urine dipstick results alone, 368 women would have received antibiotics unnecessarily: an overprescription rate of 82% (368/449). If administration was based on urine culture findings plus urinary tract infection symptoms, 144 of 368 women with negative urine culture findings would have received antibiotics unnecessarily: an overprescription rate of 39.1% (144/368). The additional cost of urine culture was 0.48 euros per woman. Conclusion: A high proportion of pregnant women with suspected urinary tract infections from refugee camps unnecessarily received antibiotics. Including urine culture in diagnosis, which is affordable in Lebanon, would greatly reduce antibiotic overprescription. Similar approaches could be adopted in other regions where microbiology laboratories are accessible.


Asunto(s)
Antibacterianos , Refugiados , Infecciones Urinarias , Humanos , Femenino , Infecciones Urinarias/tratamiento farmacológico , Infecciones Urinarias/diagnóstico , Líbano , Embarazo , Antibacterianos/uso terapéutico , Estudios Transversales , Estudios Prospectivos , Adulto , Complicaciones Infecciosas del Embarazo/tratamiento farmacológico , Adulto Joven , Urinálisis
2.
Am J Primatol ; 86(7): e23638, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38715239

RESUMEN

Phenolics, like tannins, are plant-specialized metabolites that play a protective role against herbivory. Tannins can reduce palatability and bind with proteins to reduce digestibility, acting as deterrents to feeding and impacting nutrient extraction by herbivores. Some assays measure tannin and total phenolics content in plants but lack determination of their biological effects, hindering the interpretation of tannin function in herbivory and its impacts on animal behavior and ecology. In this study, we successfully applied the radial diffusion assay to assess tannin protein precipitation (PP) capacity and evaluate the anti-nutritional effects of tannins in food plants (n = 24) consumed by free-ranging black howler monkeys (Alouatta pigra) in Tabasco, Mexico. We found PP rings in five plant species consumed by the monkeys. The mature fruit of Inga edulis was the most consumed food plant, despite having a high tannin PP capacity (56.66 mg tannic acid equivalent/g dry matter). These findings highlight the presence of tannins in the black howler diet and provide insight into the primates' resilience and potential strategies for coping with anti-nutritional aspects of the diet.


Asunto(s)
Alouatta , Dieta , Preferencias Alimentarias , Taninos , Animales , Taninos/análisis , Alouatta/fisiología , Dieta/veterinaria , México , Masculino , Femenino
3.
Am J Primatol ; : e23684, 2024 Sep 23.
Artículo en Inglés | MEDLINE | ID: mdl-39308413

RESUMEN

In May and June 2024, a die-off of Mexican mantled howler monkeys (Alouatta palliata mexicana) occurred in southern Mexico. This commentary documents the event, attributing it to extreme heatwaves, drought, wildfires, and habitat impoverishment. Despite their reported resilience to habitat disturbances, mantled howler monkey mortality rate in some areas reached 31%. Key evidence points to heatstroke as the primary cause of death, exacerbated by limited hydration and reduced dietary diversity in disturbed habitats. Immediate responses included community-led rescues (e.g., hydrating the monkeys), coordination of rescue activities by nongovernmental organizations (NGOs) (e.g., managing donations), involvement of scientists (e.g., monitoring of primate populations), and assistance from government officials (e.g., providing legal support for animal management). This event underscores the urgency of developing action plans to prevent and attend future crises. Among other actions, we highlight (i) establishing primate care infrastructure with medical and rehabilitation centers; (ii) developing protocols and training programs to ensure rapid crisis response; (iii) fostering collaboration among government, NGOs, and academic institutions for effective crisis management; and (iv) developing targeted research on climate change impacts, predictive models, and long-term health monitoring. We emphasize the critical need for coordinated conservation efforts to protect wild primates and maintain natural ecosystem resilience in the face of escalating climate challenges.

4.
J Sex Marital Ther ; 49(3): 259-269, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-35876139

RESUMEN

Stressors arising from the COVID-19 pandemic can spill over into the quality of couple relationships, with negative consequences on mental health. The mental health impact of COVID-19 might be particularly pronounced in disadvantaged populations such as LGBT people. This study aimed to examine direct and indirect dyadic associations between emotional impact of COVID-19 and depressive symptoms through relationship satisfaction in male same-sex couples. Using a cross-sectional design, 158 male same-sex Chilean couples completed self-report measures of the emotional impact of COVID-19, relationship satisfaction and depressive symptoms. We used the actor-partner interdependence mediation model for indistinguishable dyads to explore the direct and indirect dyadic associations. Results indicated that each partner's perceived emotional impact of COVID-19 was associated with his own higher depressive symptoms directly and indirectly, through his own lower relationship satisfaction. The other partner's perceived emotional impact of COVID-19 was associated with one's own higher depressive symptoms only directly. Our findings reinforce the notion that satisfactory couple relationships can act as a protective factor against depression in the LGBT population. Programs to promote adaptive coping strategies to deal with the emotional impact of the COVID-19 pandemic may have beneficial effects for the emotional adjustment of male same-sex couples, also by promoting relationship satisfaction.


Asunto(s)
COVID-19 , Depresión , Humanos , Masculino , Depresión/psicología , Estudios Transversales , Chile , Pandemias , Relaciones Interpersonales , Satisfacción Personal
5.
J Lesbian Stud ; 27(1): 22-40, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36103623

RESUMEN

Heterosexism is not only expressed through sexual prejudice as an external stressor, but also as an internalized rejection toward one's own (and others') sexually diverse identity. That is, lesbian women and gay men themselves internalize negative societal attitudes toward their sexual orientation and identity-a phenomenon called internalized homonegativity. A wealth of research shows that internalized homonegativity negatively affects the health and social adjustment of gay and lesbian people. However, the literature has documented this trend from an individual (over a dyadic) perspective, and largely among gay (over lesbian) samples. To address this oversight, we analyzed data from 210 gay and lesbian couples in Chile to examine both actor and partner effects of internalized homonegativity on their sexual satisfaction. Results from moderation analyses from an actor-partner interdependence model (APIM) approach show that partners' internalized homonegativity negatively affects actor sexual satisfaction, a pattern significantly moderated by gender; that is, only observed among lesbian couples. Our results further demonstrated that these effects hold above and beyond the actor and partner effects of age and relationship satisfaction, as well as relationship length. These results are consistent with the broader literature, which discusses the specific features of internalized homonegativity in lesbian women, characterized-among other aspects-by restrictive social demands over their sexuality. Accordingly, our findings highlight the deleterious relational consequences of internalized homonegativity and offer a relevant empirical contribution to the understanding of specific minority stress dynamics among lesbian women.


Asunto(s)
Homosexualidad Femenina , Minorías Sexuales y de Género , Humanos , Masculino , Femenino , Homosexualidad Masculina , Chile , Conducta Sexual
6.
Arch Sex Behav ; 50(8): 3505-3516, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34259985

RESUMEN

Understanding the internal diversity of transgender communities is essential for developing optimal, inclusive policies and service provision. To date, research on this topic remains scarce in Chile. We conducted a survey study describing sociodemographic characteristics (age, sex assigned at birth, onset age, nationality, education, sex work, having a partner, having children, sexual orientation, religiousness, gender identification, and gender affirmation pathways). A snowball sample of 377 self-identified transgender adults living in Chile (Mage = 31.88, rangeage = 18-67) was collected for the purpose of this study. According to their sex assigned at birth, 139 participants were female and 238 male. Results revealed that sex assigned at birth was significantly associated with almost all the sociodemographic variables. Eight gender self-identification categories were obtained based on self-declaration. These gender identification categories varied according to sex assigned at birth. Finally, four patterns (clusters) of gender affirmative actions were identified among participants. These patterns indicated that the longer the gender affirmation pathway time, the greater the invasiveness level of the medical procedures used. Sex assigned at birth moderated the association between gender affirmation pathways and gender identity categories. Results were discussed highlighting the heterogeneity found in terms of sociodemographic characteristics, gender identification, and gender affirmation pathways.


Asunto(s)
Personas Transgénero , Transexualidad , Adolescente , Adulto , Anciano , Niño , Chile/epidemiología , Femenino , Identidad de Género , Humanos , Recién Nacido , Masculino , Persona de Mediana Edad , Encuestas y Cuestionarios , Adulto Joven
7.
Rev Med Chil ; 148(8): 1113-1120, 2020 Aug.
Artículo en Español | MEDLINE | ID: mdl-33399778

RESUMEN

BACKGROUND: Transgender population is at a higher risk of suffering mental health problems than cisgender population (people whose sex and gender identity are in agreement) and other sexual minorities (gays, lesbians, and bisexuals), partly due to the greater stress that they suffer or for being victims of sexual prejudice. AIM: To describe positive and negative mental health indicators in a sample of transgender people living in Chile. MATERIAL AND METHODS: An intentional sample of 377 transgender individuals older than 18 years, living in the country's northern, center and southern zones were studied. Sociodemographic and well-being features, negative emotional symptoms, suicidal behavior, and substance consumption were assessed. RESULTS: A precarious mental health was confirmed among participants. A high frequency of depression, ideation and suicide attempts, and high levels of depression, anxiety, and stress symptoms were identified. Also, a high frequency of substance abuse was found. These mental health indicators varied according to the sex assigned at birth and gender self-identification. CONCLUSIONS: Transgender people experience precariousness and vulnerability in their mental health.


Asunto(s)
Salud Mental , Ideación Suicida , Personas Transgénero , Chile , Femenino , Identidad de Género , Humanos , Masculino , Personas Transgénero/psicología
9.
J Trauma Stress ; 31(1): 5-13, 2018 02.
Artículo en Inglés | MEDLINE | ID: mdl-29412480

RESUMEN

This study examined the direct and indirect effects of perceived stigma on posttraumatic growth (PTG) in a sample of gay men and lesbian women in Chile, with coping strategies (positive reappraisal, social support seeking, and active coping strategies) as intermediate variables. Data from 467 gay men (57.4%) and lesbian women (42.6%) were analyzed. A respondent-driven sampling (RDS) method was used. The hierarchical regression analysis indicated the important predictive role of active coping, ß = .23, and positive reappraisal, ß = .45, in PTG, R2 = .31, p < .001, f2 = 0.16. Results revealed that, in the presence of positive reappraisal coping as an intermediate variable, partial indirect effects are detected between perceived stigma and PTG. Seeking instrumental social support did not produce indirect effects between perceived stigma and PTG, whereas active coping produced partial indirect effects. These findings suggest that the positive reappraisal of a traumatic experience is essential for reporting personal growth. Implications of these more complex relations for counseling interventions and further research are discussed.


Asunto(s)
Adaptación Psicológica , Crecimiento Psicológico Postraumático , Minorías Sexuales y de Género/psicología , Estigma Social , Adolescente , Adulto , Anciano , Chile , Femenino , Homosexualidad Femenina , Homosexualidad Masculina , Humanos , Masculino , Persona de Mediana Edad , Percepción , Prejuicio , Discriminación Social , Apoyo Social , Adulto Joven
10.
Am J Primatol ; 80(2)2018 02.
Artículo en Inglés | MEDLINE | ID: mdl-29363818

RESUMEN

Dietary tannins can affect protein digestion and absorption, be toxic, and influence food selection by being astringent and bitter tasting. Animals that usually ingest tannins may regularly secrete tannin-binding salivary proteins (TBSPs) to counteract the negative effects of tannins or TBSPs production can be induced by a tannin-rich diet. In the wild, many primates regularly eat a diet that contains tannin-rich leaves and unripe fruit and it has been speculated that they have the physiological ability to cope with dietary tannins; however, details of their strategy remains unclear. Our research details the salivary protein composition of wild and zoo-living black howler monkeys (Alouatta pigra) feeding on natural versus manufactured low-tannin diets, and examines differences in TBSPs, mainly proline-rich proteins (PRPs), to determine whether production of these proteins is dependent on the tannin content of their food. We measured the pH, flow rate, and concentration of total protein and trichloroacetic acid soluble proteins (an index of PRPs) in saliva. Howler monkeys produced slightly alkaline saliva that may aid in the binding interaction between tannin and salivary proteins. We used gel electrophoresis to describe the salivary protein profile and this analysis along with a tannin-binding assay allowed us to detect several TBSPs in all individuals. We found no differences in the characteristics of saliva between wild and zoo-living monkeys. Our results suggest that black howler monkeys always secrete TBSPs even when fed on foods low in tannins. This strategy of constantly using this salivary anti-tannin defense enables them to obtain nutrients from plants that sometimes contain high levels of tannins and may help immediately to overcome the astringent sensation of their food allowing howler monkeys to eat tanniferous plants.


Asunto(s)
Alouatta/metabolismo , Proteínas y Péptidos Salivales/análisis , Taninos/metabolismo , Alimentación Animal/análisis , Animales , Animales Salvajes , Animales de Zoológico , Proteínas Portadoras/análisis , Dieta/veterinaria , Concentración de Iones de Hidrógeno , Saliva/química , Proteínas Salivales Ricas en Prolina/análisis , Taninos/análisis
11.
Rev Panam Salud Publica ; 41: e4, 2017 Apr 20.
Artículo en Inglés | MEDLINE | ID: mdl-28444004

RESUMEN

OBJECTIVE: To explore the association among HIV status; negative psychological symptoms (anxiety, depression, and hostility); and risky sexual behaviors (multiple sexual partners and unprotected sexual intercourse) in a Chilean sample of men who have sex with men (MSM). METHODS: This study had a cross-sectional design and a sample of 325 MSM whose ages ranged from 18 to 64 years (mean: 30.8; standard deviation: 9.8). Association tests (chi-squared) and group mean comparisons (Student's t-tests and F-tests) were performed. RESULTS: No statistically significant differences were found for condom use or for the number of sexual partners between HIV-positive men and those who are not infected. In both groups, about 50% reported sexual encounters without condom use in the past six months. There were statistically significant differences in symptoms associated with depression between the two groups. CONCLUSIONS: These results reveal the need to strengthen messages about the importance of condom use, as the only way to prevent HIV, and as a means of preventing HIV infection and reinfection, in national prevention and self-care programs for sexually active subjects. More studies are needed in Latin America to advance HIV prevention efforts for the MSM population. The data generated by this study can be used to inform the development of HIV prevention programming strategies and interventions targeting the MSM population in Latin America.


Asunto(s)
Infecciones por VIH , Homosexualidad Masculina , Salud Mental , Asunción de Riesgos , Conducta Sexual , Adolescente , Adulto , Chile , Estudios Transversales , Humanos , Masculino , Persona de Mediana Edad , Salud Urbana , Adulto Joven
12.
Rev Med Chil ; 145(9): 1115-1121, 2017 Sep.
Artículo en Español | MEDLINE | ID: mdl-29424397

RESUMEN

BACKGROUND: Most of the information in Chile about health and wellbeing of sexual minorities refers to risk behaviors. AIM: To assess health and wellbeing in a sample of Chilean homosexual men and women. MATERIAL AND METHODS: Spanish versions of the Satisfaction With Life Scale and Outcome Questionnaire-45 (OQ-45) were answered by 191 homosexual women and 256 homosexual men aged 18 to 67 years, from four Chilean cities. RESULTS: Lesbian women have better levels of satisfaction with life and adjustment in personal relationships than homosexual men. Eight percent of respondents had suicidal thoughts in some moment of their life. CONCLUSIONS: The information gathered in this work could help in the development of mental health policies for sexual minorities.


Asunto(s)
Salud Mental/estadística & datos numéricos , Satisfacción Personal , Calidad de Vida/psicología , Minorías Sexuales y de Género/psicología , Adolescente , Adulto , Anciano , Chile , Femenino , Homosexualidad Femenina/psicología , Homosexualidad Femenina/estadística & datos numéricos , Homosexualidad Masculina/psicología , Homosexualidad Masculina/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Minorías Sexuales y de Género/estadística & datos numéricos , Ideación Suicida , Encuestas y Cuestionarios , Adulto Joven
13.
Child Adolesc Psychiatry Ment Health ; 18(1): 44, 2024 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-38555447

RESUMEN

The study aimed to assess the impact of an attachment-based intervention on adolescent adaptation to parental divorce. The Adolescent Adjustment Pilot Program to Parental Divorce (AAPPD) employed an experimental group format, targeting improvements in various adaptation indicators (life satisfaction, positive affect, and negative affect). The sample comprised 30 Chilean adolescents aged 12 to 16 (M = 13.6, SD = 1.35), with 60% females and 40% males. After the intervention, the adolescents showed a decrease in negative affect at 6 and 12 months. However, no differences were identified in other dimensions of subjective well-being considered as indicators of divorce adaptation. The findings prompt discussion on theoretical and clinical implications.

14.
Open Forum Infect Dis ; 11(8): ofae379, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39086461

RESUMEN

The Médecins Sans Frontières Tertiary Orthopaedic Care center in Mosul, Iraq, provides reconstructive surgery, microbiological analysis, integrated infection prevention and control, and antibiotic stewardship services. Between May 2018 and February 2020, we recorded soft tissue and/or bone infections caused by gram-negative extensively drug-resistant (XDR) bacteria in 4.9% (13/266) of the admitted patients. The XDR bacteria identified among 12 patients in this case series were extended-spectrum ß-lactamase-producing Klebsiella pneumoniae (n = 5, 41.7%) with intermediate sensitivity or resistance to imipenem and/or meropenem, Acinetobacter spp (n = 3, 25.0%; 2 Acinetobacter baumannii strains) resistant to imipenem and/or meropenem, Pseudomonas aeruginosa (n = 2, 16.7%) resistant to imipenem and meropenem, and extended-spectrum ß-lactamase-producing Proteus mirabilis (n = 2, 16.7%) resistant to meropenem. Most XDR isolates were sensitive only to colistin or polymyxin B, neither of which is available in Iraq. Therefore, the only treatment option was multiple rounds of surgical debridement and wound care. The infection was deemed cured before discharge in 7 patients (58.3%). Meanwhile, 4 patients (33.3%) were discharged with unhealed wounds, and outpatient follow-up was planned. One patient died in the intensive care unit of a referral hospital after developing septicemia postsurgery. XDR bacteria pose substantial health risks in Iraq. Thus, improving antimicrobial stewardship and accessibility to essential antibiotics is critical to address this issue.

15.
Front Psychol ; 14: 1148005, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37063530

RESUMEN

Introduction: The present study aimed to examine dyadic associations between attachment insecurity and emotional intimacy in same-sex male couples, and to investigate whether and how each partner's internalized homonegativity (IH) moderated these associations. Methods: The sample included 138 same-sex male couples. Both dyad members completed self-report measures of attachment insecurity, emotional intimacy, and IH. The actor-partner interdependence model with moderation analysis was applied. Results: Indicated that higher levels of actor's and partner's attachment anxiety and attachment avoidance were associated with lower actor's emotional intimacy. IH moderated the partner effects of attachment avoidance on emotional intimacy. The partner's higher attachment avoidance was associated with one's own lower emotional intimacy at low (but not high) levels of one's own IH and at high (but not low) levels of the partner's IH. Discussion: Findings suggest that the partner's attachment avoidance may differently affect one's own emotional intimacy depending on the IH levels of both dyad members. Helping partnered sexual minority men decrease attachment insecurity while recognizing their own and their partners' IH may promote relationship quality.

16.
Zoonoses Public Health ; 70(4): 327-340, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-36757053

RESUMEN

SARS-CoV-2 can infect pets under natural conditions, which raises questions about the risk factors related to the susceptibility of these animals to infection. The status of pet infection by SARS-CoV-2 in Mexico is not well-understood. We aimed to estimate the frequency of positive household cats and dogs to viral RNA and antibodies for SARS-CoV-2 during the second wave of human infections in Mexico, and to recognize the major risk factors related to host and pet ownership behaviour. We evaluated two study groups, cats and dogs from COVID-19-infected/-suspected households (n = 44) and those admitted for veterinary care for any reason at several veterinary hospitals in Puebla City, Mexico (n = 91). Using RT-PCR, we identified the presence of SARS-CoV-2 RNA in swabs of four dogs (18.18%) and zero cats in COVID-19-infected/-suspected households; within this group, 31.82% of dogs and 27.27% of cats were tested IgG ELISA-positive; and neutralizing antibodies were detected in one dog (4.55%) and two cats (9.09%). In the random group (pets evaluated at private clinics and veterinary teaching hospital), 25.00% of dogs and 43.59% of cats were ELISA-positive and only one cat showed neutralizing antibodies (2.56%). Older than 4-year-old, other pets at home, and daily cleaning of pet dish, were each associated with an increase in SARS-CoV-2 infection (p < 0.05). Allowing face lick, sharing bed/food with pets and owner tested positive or suspected COVID-19 were not significant risk factors, but more than 4 h the owner spent away from home during the lockdown for COVID-19 (OR = 0.37, p = 0.01), and outdoor pet food tray (OR = 0.32, p = 0.01) significantly decreased the risks of SARS-CoV-2 infection in pets, suggesting that time the owner spends with their pet is an important risk factor.


Asunto(s)
COVID-19 , Enfermedades de los Gatos , Enfermedades de los Perros , Animales , Gatos , Humanos , Perros , COVID-19/epidemiología , COVID-19/veterinaria , SARS-CoV-2 , Propiedad , México/epidemiología , Hospitales Veterinarios , ARN Viral , Control de Enfermedades Transmisibles , Hospitales de Enseñanza , Anticuerpos Neutralizantes , Factores de Riesgo , Mascotas , Enfermedades de los Gatos/epidemiología , Enfermedades de los Perros/epidemiología
18.
J Homosex ; 69(10): 1777-1799, 2022 Aug 24.
Artículo en Inglés | MEDLINE | ID: mdl-34080955

RESUMEN

The Minority Stress Model has proposed that connectedness to a specific minority community may be a protective factor for stigmatized groups. This study evaluated the mediational role of connectedness with the gay men's and lesbian women's community on the relationship between two minority stressors (internalized homophobia and perceived sexual stigma) with anxiety-depressive symptomatology and life satisfaction. The sample consisted of 467 Chilean self-identified as gay men (57%) and lesbian women (43%). Results revealed that the two minority stressors were associated with anxiety-depressive symptomatology, but only internalized homophobia was associated with life satisfaction. The mediation hypothesis was partially supported by the relationship between internalized homophobia and life satisfaction. Unexpectedly, we found a negative association between connectedness with the gay men's and lesbian women's community and life satisfaction. This finding introduces a view that contrasts with the literature, which proposes that connectedness with the specific community would be a protective factor against sexual stigma.


Asunto(s)
Homofobia , Minorías Sexuales y de Género , Chile , Femenino , Homofobia/psicología , Homosexualidad Masculina/psicología , Humanos , Masculino , Salud Mental , Satisfacción Personal
19.
Mol Ther Methods Clin Dev ; 25: 124-135, 2022 Jun 09.
Artículo en Inglés | MEDLINE | ID: mdl-35402630

RESUMEN

Most therapeutic proteins are glycosylated with N-glycans and/or O-glycans. N-glycans on therapeutic proteins have been extensively studied for their control strategy and impact on drug product quality. However, knowledge of O-glycosylation in therapeutic protein production and its impact on product quality remains elusive. To address this gap, we generated an O-glycoengineered Chinese Hamster Ovary (CHO) cell line platform to modulate O-glycosylation of therapeutic proteins and investigated the impact of O-glycans on the physicochemical and biological properties of etanercept. Our results demonstrate that this CHO cell line platform produces controlled O-glycosylation profiles containing either truncated O-glycans (sialylTn and/or Tn), or sialylCore 3 alone, or sialylCore 1 with sialylTn or sialylCore 3 O-glycans on endogenous and recombinant proteins. Moreover, the platform demonstrated exclusive modulation of O-glycosylation without affecting N-glycosylation. Importantly, certain O-glycans on etanercept enhanced tumor necrosis factor-α binding affinity and consequent potency. This is the first report that describes the systematic establishment of an O-glycoengineered CHO cell line platform with direct evidence that supports the applicability of the platform in the production of engineered proteins with desired O-glycans. This platform is valuable for identifying O-glycosylation as a critical quality attribute of biotherapeutics using the quality by design principle.

20.
PeerJ ; 10: e14402, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36452077

RESUMEN

Tannins are a chemical defense mechanism of plants consumed by herbivores. Variations in salivary physicochemical characteristics such as pH, total protein concentration (TP), and presence of proline-rich proteins (PRPs) in animals have been reported as a mechanism to protect the oral cavity when consuming food with variations in pH and tannins. Variations in salivary physiochemistry as adaptations for consuming tannin-rich foods have been found in omnivorous and folivorous primates, but have not yet been reported in frugivorous species such as spider monkeys. We therefore assessed changes in pH using test strips, TP concentration by measuring absorbance at 595 nm in a spectrophotometer and salivary PRPs using the SDS-PAGE electrophoresis technique in the saliva of nine captive spider monkeys in response to the consumption of solutions with different concentrations of tannic acid. The results showed variations in pH, TP concentration and the presence and variation of possible salivary PRPs associated with tannic acid concentration. These findings suggest that spider monkeys may tailor their salivary physicochemical characteristics in response to the ingestion of potentially toxic compounds.


Asunto(s)
Ateles geoffroyi , Atelinae , Animales , Saliva/química , Taninos/análisis , Proteínas y Péptidos Salivales/análisis
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