Insights into the functional role of tomato TM6 as a transcriptional regulator of flower development.

Flower development is a crucial step towards the completion of the plant life cycle. Physiological processes and gene regulatory mechanisms underlying flower formation have been extensively characterized, and the implication of MADS-box transcription factors as primary regulators of flower morphology has been widely described, mainly due to the analysis of loss-of-function mutants in model species. Nevertheless, detailed characterization of allele variation in several MADS-box homologous genes from crop species remains undescribed. Here, we have characterized a tomato mutant with aberrant flower development. Mutant plants exhibit changes in petal cell identity, as well as homeotic transformations of stamens into carpelloid structures, which in most cases result in succulent organs. Molecular analysis proved that a loss-of-function mutation in the TOMATO MADS-BOX 6 (TM6) gene is responsible for this mutant phenotype. Furthermore, as a result of the loss of function of TM6, misregulation of the transcription and mRNA processing of other MADS-box genes involved in reproductive development has been detected. Our findings demonstrate that TM6 is a key player in the complex regulatory network of MADS-box genes controlling flower development and also provide a novel mutant that may be useful for generating male sterile lines in tomatoes.

Normothermic Regional Perfusion in Controlled Donation After Circulatory Determination of Death Simultaneous Pancreas - Kidney Transplantation.

BACKGROUND: Simultaneous pancreas-kidney transplantation is the optimal treatment for patients with type 1 diabetes and renal failure. The use of pancreas grafts from donation after circulatory death (DCD), using normothermic regional perfusion (NRP), is still marginal worldwide, mainly due to possible additional risks of graft dysfunction and complications compared with grafts from donors after brain death. METHODS: Case series of patients who underwent simultaneous pancreas-kidney transplantation after DCD-NRP between January 2018 and September 2022. This study evaluated early postoperative grafts and survival outcomes. RESULTS: Four patients were included. One patient lost the pancreatic graft due to arterial thrombosis requiring transplantectomy. Another patient required a laparotomy due to hemoperitoneum. Overall, 1-year pancreas and kidney graft survival was 75% and 100%, respectively. One patient developed a lymphoma during the follow-up. CONCLUSION: The use of pancreas grafts from DCD after NRP preservation is safe and feasible. Comparative studies with donors after brain death grafts and larger series are required to confirm the feasibility of DCD-NRP pancreas transplantation.

Equity in out-of-pocket health expenditure: Evidence from a health insurance program reform in Mexico.

Background: The fragmentation of health systems in low- and middle-income countries (LMICs) deepens health inequities and shifts the economic burden of health care to families via out-of-pocket spending (OOPHE). This problem has been addressed by introducing public health insurance programs for poor people; however, there is a lack of knowledge about how equitable these programs are. We aimed to analyse the long-term effects of the Seguro Popular (SP) voluntary health insurance program, recently phased out and replaced by the Health Institute for Welfare (Instituto de Salud para el Bienestar (INSABI)), on OOPHE equity in the poor Mexican population. Methods: We conducted a pooled cross-sectional analysis using eleven waves of the National Household Income and Expenditure Survey (2002-2020). We identified the effect of SP by selecting households without social security (with SP or without health insurance (n = 169 766)) and matched them by propensity score to reduce bias in the decision to enrol in SP. We estimated horizontal and vertical equity metrics and assessed their evolution across subpopulations. Results: The program's entry years (2003-2010) show a positive redistributive effect associated with a focalised stage of the program, while oversaturation could have diluted these effects during 2010-2014, with adverse results in terms of vertical equity and re-ranking among insured families. SP is more horizontally inequitable than for those uninsured. Within SP, the redistributive effect could improve up to 13% if all families with similar expenditures were spending equal OOPHE and horizontal equity was eliminated. Regarding vertical equity, SP outperforms the insured population with middle-range coverage some years after the implementation, but this progress disappears. Conclusions: To achieve universal health coverage, health authorities need to create and execute financial protection mechanisms that effectively address structural inequalities. This involves implementing a more comprehensive risk-pooling mechanism that makes social insurance sustainable in the long-run by increasing the social-economic influx of resources. It is essential to monitor oversaturation and financial sustainability to achieve optimal results. The replacement of the SP with INSABI highlights the complexity of maintaining a social insurance program where the ideology of different governments can influence the program structure, regulation, financing, and even its existence.

Catastrophic health expenditure during the COVID-19 pandemic in five countries: a time-series analysis.

BACKGROUND: The COVID-19 pandemic disrupted health systems in 2020, but it is unclear how financial hardship due to out-of-pocket (OOP) health-care costs was affected. We analysed catastrophic health expenditure (CHE) in 2020 in five countries with available household expenditure data: Belarus, Mexico, Peru, Russia, and Viet Nam. In Mexico and Peru, we also conducted an analysis of drivers of change in CHE in 2020 using publicly available data. METHODS: In this time-series analysis, we defined CHE as when OOP health-care spending exceeds 10% of consumption expenditure. Data for 2004-20 were obtained from individual and household level survey microdata (available for Mexico and Peru only), and tabulated data from the National Statistical Committee of Belarus and the World Bank Health Equity and Financial Protection Indicator database (for Viet Nam and Russia). We compared 2020 CHE with the CHE predicted from historical trends using an ensemble model. This method was also used to assess drivers of CHE: insurance coverage, OOP expenditure, and consumption expenditure. Interrupted time-series analysis was used to investigate the role of stay-at-home orders in March, 2020 in changes in health-care use and sector (ie, private vs public). FINDINGS: In Mexico, CHE increased to 5·6% (95% uncertainty interval [UI] 5·1-6·2) in 2020, higher than predicted (3·2%, 2·5-4·0). In Belarus, CHE was 13·5% (11·8-15·2) in 2020, also higher than predicted (9·7%, 7·7-11·3). CHE was not different than predicted by past trends in Russia, Peru, and Viet Nam. Between March and April, 2020, health-care visits dropped by 4·6 (2·6-6·5) percentage points in Mexico and by 48·3 (40·6-56·0) percentage points in Peru, and the private share of health-care visits increased by 7·3 (4·3-10·3) percentage points in Mexico and by 20·7 (17·3-24·0) percentage points in Peru. INTERPRETATION: In three of the five countries studied, health systems either did not protect people from the financial risks of health care or did not maintain health-care access in 2020, an indication of health systems failing to maintain basic functions. If the 2020 response to the COVID-19 pandemic accelerated shifts to private health-care use, policies to cover costs in that sector or motivate patients to return to the public sector are needed to maintain financial risk protection. FUNDING: The Bill & Melinda Gates Foundation.

Inequitable Financial Protection in Health for Indigenous Populations: the Mexican Case.

BACKGROUND: There is an important gap in the literature concerning the level, inequality, and evolution of financial protection for indigenous (IH) and non-indigenous (NIH) households in low- and middle-income countries. This paper offers an assessment of the level, socioeconomic inequality and middle-term trends of catastrophic (CHE), impoverishing (IHE), and excessive (EHE) health expenditures in Mexican IHs and NIHs during the period 2008-2020. METHODS: We conducted a pooled cross-sectional analysis using the last seven waves of the National Household Income and Expenditure Survey (n = 315,829 households). We assessed socioeconomic inequality in CHE, IHE, and EHE by estimating their Wagstaff concentration indices according to indigenous status. We adjusted the CHE, IHE, and EHE by estimating a maximum-likelihood two-stage probit model with robust standard errors. RESULTS: We observed that, during the period analyzed, CHE, IHE, and EHE were concentrated in the poorest IHs. CHE decreased from 5.4% vs. 4.7% in 2008 to 3.4% vs. 2.9% in 2014 in IHs and NIHs, respectively, and converged at 2008 levels towards 2020. IHE remained unchanged from 2008 to 2014 (1.6% for IHs vs. 1.0% for NIHs) and increased by 40% in IHs and NIHs during 2016-2020. EHE plunged in 2014 (4.6% in IHs vs. 3.8% in NIHs), then rose, and remained unchanged during 2016-2020 (6.7% in IHs and 5.6% in NIHs). CONCLUSION: In pursuit of universal health coverage, health authorities should formulate and implement effective financial protection mechanisms to address structural inequalities, especially forms of discrimination including racialization, that vulnerable social groups such as indigenous peoples have systematically faced. Doing so would contribute to closing the persistent ethnic gaps in health.

A novel function of the tomato CALCINEURIN-B LIKE 10 gene as a root-located negative regulator of salt stress.

Climate change exacerbates abiotic stresses like salinization, negatively impacting crop yield, so development of strategies, like using salt-tolerant rootstocks, is crucial. The CALCINEURIN B-LIKE 10 (SlCBL10) gene has been previously identified as a positive regulator of salt tolerance in the tomato shoot. Here, we report a different function of SlCBL10 in tomato shoot and root, as disruption of SlCBL10 only induced salt sensitivity when it was used in the scion but not in the rootstock. The use of SlCBL10 silencing rootstocks (Slcbl10 mutant and RNAi line) improved salt tolerance on the basis of fruit yield. These changes were associated with improved Na+ and K+ homoeostasis, as SlCBL10 silencing reduced the Na+ content and increased the K+ content under salinity, not only in the rootstock but also in the shoot. Improvement of Na+ homoeostasis in Slcbl10 rootstock seems to be mainly due to induction of SlSOS1 expression, while the higher K+ accumulation in roots seems to be mainly determined by expression of LKT1 transporter and SlSKOR channel. These findings demonstrate that SlCBL10 is a negative regulator of salt tolerance in the root, so the use of downregulated SlCBL10 rootstocks may provide a suitable strategy to increase tomato fruit production under salinity.

A Gender-Based and Quasi-Experimental Study of the Catastrophic and Impoverishing Health-Care Expenditures in Mexican Households with Elderly Members, 2000-2020.

Latin America has experienced a rise in noncommunicable diseases (NCDs) which is having repercussions on the structuring of healthcare delivery and social protection for vulnerable populations. We examined catastrophic (CHE) and excessive (EHE, impoverishing and/or catastrophic) health care expenditures in Mexican households with and without elderly members (≥65 years), by gender of head of the households, during 2000-2020. We analyzed pooled cross-sectional data for 380,509 households from eleven rounds of the National Household Income and Expenditure Survey. Male- and female-headed households (MHHs and FHHs) were matched using propensity scores to control for gender bias in systematic differences regarding care-seeking (demand for healthcare) preferences. Adjusted probabilities of positive health expenditures, CHE and EHE were estimated using probit and two-stage probit models, respectively. Quintiles of EHE by state among FHHs with elderly members were also mapped. CHE and EHE were greater among FHHs than among MHHs (4.7% vs 3.9% and 5.5% vs 4.6%), and greater in FHHs with elderly members (5.8% vs 4.9% and 6.9% vs 5.8%). EHE in FHHs with elderly members varied geographically from 3.9% to 9.1%, being greater in less developed eastern, north-central and southeastern states. Compared with MHHs, FHHs face greater risks of CHE and EHE. This vulnerability is exacerbated in FHHs with elderly members, because of gender intersectional vulnerability. The present context, marked by a growing burden of NCDs and inequities amplified by COVID-19, makes key interlinkages across multiple Sustainable Development Goals (SDGs) apparent, and calls for urgent measures that strengthen social protection in health.

Evaluation of effective coverage for type 2 diabetes in Mexican primary care health information systems: a retrospective registry analysis.

BACKGROUND: As the leading cause of disability and the fourth leading cause of premature death in Mexico, type 2 diabetes (T2D) represents a serious public health concern. The incidence of diabetes has increased dramatically in recent years, and data from the Mexican National Health and Nutrition Survey (ENSANUT) indicate that many people remain undiagnosed. Persistent socioeconomic health care barriers exacerbate this situation, as T2D morbidity and mortality are worsened in vulnerable populations, such as those without social security. We evaluated the performance of public primary health centers (PHCs) in T2D medical attention through the measure of effective coverage (EC, a combined measure of health care need, use, and quality) at national, state, health jurisdiction, and municipality levels. METHODS: This retrospective analysis used blinded data recorded during 2017 in the Non-communicable Diseases National Information System (SIC) and T2D prevalence reported in 2018 ENSANUT to evaluate the EC achieved. We included individuals ≥ 20 years old without social security who did not declare the use of private health care services. Each EC component (need, use, and quality) was estimated based on the Shengelia adapted framework. The Kruskal-Wallis test was applied to evaluate the associations among EC quintiles and demographics. RESULTS: In 2017, 26.5 million individuals, aged ≥ 20 years, without social security, and without the use of private health care services, were under the care of 12,086 PHCs. The national prevalence of T2D was 10.3%, equivalent to 2.6 million people living with T2D in need of primary health care. Large contrasts were seen among EC components between and within Mexican states. We found that only 37.1% of the above individuals received health services at PHCs and of them, 25.8% improved their metabolic condition. The national EC was 9.3%, and the range (by health jurisdiction) was 0.2%-38.6%, representing a large geographic disparity in EC. We found an evident disconnect among need, utilization, and quality rates across the country. CONCLUSIONS: Expansion and improvement of EC are urgently needed to address the growing number of people living with T2D in Mexico, particularly in states with vulnerable populations.

Comparison of treatment and outcomes in blunt thoracic aortic injury based on different vascular surgery guidelines.

OBJECTIVE: Society for Vascular Surgery (SVS) recommendations for managing intimal (grade 1) blunt thoracic aortic injuries (BTAIs) include observation and medical management. University of Washington (UW) revised criteria suggest that intimal injuries with ≥1 cm flap should be upgraded to a moderate injury and treatment be considered. We sought to evaluate and compare SVS and UW criteria for BTAI and determine how discordance in grading affected treatment and outcome. METHODS: We reviewed all patients admitted with BTAI from January 1, 2011, to March 31, 2022. Data included injury grading, demographics, and concomitant traumatic injuries. Images were reviewed to categorize the injury with both grading systems. Treatment and outcomes were analyzed for concordant and discordant groups. RESULTS: Our cohort comprised 208 patients after excluding four who died upon arrival. The mean age was 45 ± 19 years, 69% were men, and the median injury severity score was 34 (interquartile range, 26-45). Strong agreement was observed between the grading systems (kappa = 0.88). All patients with concordant grade 1 injuries (n = 54) were observed. SVS grade 1/2 BTAIs were reclassified in 12 of 71 patients (16.9%). Two (28.6%) SVS grade 2 injuries were graded lower with the UW criteria; neither patient required immediate or delayed repair. Ten (15.6%) SVS grade 1 BTAIs were graded higher with UW criteria. Of these, six underwent repair (one for preoperative embolization), and four were observed without sequalae. Overall mortality was 7.7% with no difference for concordant or discordant grades (7.7% vs 8.3%; P = .99). No aneurysm-related mortalities were observed. Follow-up imaging was available for 94 survivors (49.0%) at a median of 193 days (interquartile range, 42-522 days). Two patients unrepaired at the index hospitalization (SVS grade 3/UW grade 2) underwent successful delayed repair. No patient observed for a minimal injury had BTAI progression or required treatment. CONCLUSIONS: The UW grading system may upgrade or downgrade SVS grade 1 or 2 BTAI for as many as one in six injuries. Upgraded injuries should prompt consideration of repair if there is evidence of flap progression or thromboembolic complications. Downgraded injuries suggest that treatment may not be necessary; clinical expertise is key to determine optimal management in these patients.

Burden, Incidence, Mortality and Lethality of Maternal Disorders in Mexico 1990-2019: An Analysis for the Global Burden of Disease Study 2019.

BACKGROUND: Estimates of the sub-national distribution of maternal disorders in Mexico beyond Maternal Mortality Ratios are scarce. Characterizing the sub-national variation of maternal disorders may make it possible to focus more on interventions and thereby reduce their occurrence in a more meaningful and sustained manner. AIM: To analyze and describe the sub-national distribution, magnitude, trends and changes in the contribution of maternal causes to women's loss of health in Mexico from 1990-2019. METHODS: Using estimates from the Global Burden of Disease (GBD) 2019 study, we describe the distribution and trends of maternal mortality ratio (MMR), mortality rate, case-fatality rate and disability-adjusted life years (DALYs) due to maternal causes, at both national and state levels. RESULTS: Between 1990 and 2019, DALYs attributable to maternal causes had decreased 59.5%, mortality 63.8%, and incidence 46.5%. However, Maternal Mortality Ratio only decreased by 33%. The case-fatality rate of maternal disorders decreased by 50% overall; although for obstructed labor and uterine rupture, it remained unchanged. Lethality showed great variation between states, with a 3 fold difference between the maximum and minimum values. CONCLUSIONS: Although mortality and incidence of maternal causes in Mexico have greatly decreased in the last 30 years, these changes mostly reflect declines in fertility. The decrease seen in case-fatality rates is driven by decreases in causes such as hypertension and hemorrhage, though for others it remained constant. Efforts should be directed at improving access to, and management of, locally frequent maternal emergencies, formulating tailor-made regional interventions for maternal health.

Caloric adequacy of parenteral nutrition and its influence on the clinical outcome of hospitalised patients.

Background: The adaptation of Parenteral Nutrition (PN) to actual energy requirements of hospitalised patients is essential, since excessive and insufficient nutritional intake have been associated with poor clinical outcomes. Aim: To evaluate the adaptation of prescribed PN to the estimated nutritional requirements using three predictive equations and the influence of excessive/insufficient nutrient intake on patient clinical outcomes (nutritional parameters, metabolic and infectious complications). Methods: Prospective, observational study in hospitalised patients nutritionally assessed. Data was collected the first and fifth/sixth day of PN with clinical (infection, length of hospital stay), biochemical (visceral proteins, cholesterol, glucose, triglycerides, lymphocytes, CRP) and anthropometric parameters (skin folds, height, weight). Theoretical requirements were calculated using Harris-Benedict (HB), Mifflin-St Jeor (MF) and 25 Kcal/Kg/day formulas. The HB formula was used to compare estimated and provided requirements. Results: A total of 94 patients (mean: 72 ± 13.7 years old) were included with initial mean weight and height of 69.2 Kg and 162.8 cm, respectively (mean BMI: 26.1 Kg/m2). No statistically significant differences were found between the actual (1620 Kcal/day) and estimated caloric mean calculated with HB (1643 Kcal/day) and MF (1628 Kcal/day). When comparing with the caloric estimation, 31.9% of patients were underfed, while 14.9% were overfed. Intergroup analysis demonstrated significant variations in albumin, prealbumin, glucose, cholesterol, triglycerides and MUAC, with a significant increase of hyperglycaemia (+37.86; p < 0.05) and hypertriglyceridemia (+63.10; p < 0.05), being higher in overfed patients. Conclusion: In our study, inadequate nutrient intake was associated with a higher degree of hyperglycaemia and hypertriglyceridemia, without positive impact on anthropometric parameters.

Tomato POLLEN DEFICIENT 2 encodes a G-type lectin receptor kinase required for viable pollen grain formation.

Pollen development is a crucial biological process indispensable for seed set in flowering plants and for successful crop breeding. However, little is known about the molecular mechanisms regulating pollen development in crop species. This study reports a novel male-sterile tomato mutant, pollen deficient 2 (pod2), characterized by the production of non-viable pollen grains and resulting in the development of small parthenocarpic fruits. A combined strategy of mapping-by-sequencing and RNA interference-mediated gene silencing was used to prove that the pod2 phenotype is caused by the loss of Solanum lycopersicum G-type lectin receptor kinase II.9 (SlG-LecRK-II.9) activity. In situ hybridization of floral buds showed that POD2/SlG-LecRK-II.9 is specifically expressed in tapetal cells and microspores at the late tetrad stage. Accordingly, abnormalities in meiosis and tapetum programmed cell death in pod2 occurred during microsporogenesis, resulting in the formation of four dysfunctional microspores leading to an aberrant microgametogenesis process. RNA-seq analyses supported the existence of alterations at the final stage of microsporogenesis, since we found tomato deregulated genes whose counterparts in Arabidopsis are essential for the normal progression of male meiosis and cytokinesis. Collectively, our results revealed the essential role of POD2/SlG-LecRK-II.9 in regulating tomato pollen development.

A Systematic Review of Tranexamic Acid-Associated Venous Thromboembolic Events in Combat Casualties and Considerations for Prolonged Field Care.

INTRODUCTION: Tranexamic acid (TXA) is a standard component of Tactical Combat Casualty Care. Recent retrospective studies have shown that TXA use is associated with a higher rate of venous thromboembolic (VTE) events in combat-injured patients. We aim to determine if selective administration should be considered in the prolonged field care environment. MATERIALS AND METHODS: We performed a systematic review using the 2020 Preferred Reporting Items for Systematic Review and Meta-Analysis guidelines. Clinical trials and observational studies of combat casualties published between January 1, 1960, and June 20, 2022, were included. We analyzed survival and VTE outcomes in TXA recipients and non-recipients. We discussed the findings of each paper in the context of current and future combat environments. RESULTS: Six articles met criteria for inclusion. Only one study was powered to report mortality data, and it demonstrated a 7-fold increase in survival in severely injured TXA recipients. All studies reported an increased risk of VTE in TXA recipients, which exceeded rates in civilian literature. However, five of the six studies used overlapping data from the same registry and were limited by a high rate of missingness in pertinent variables. No VTE-related deaths were identified. CONCLUSIONS: There may be an increased risk of VTE in combat casualties that receive TXA; however, this risk must be considered in the context of improved survival and an absence of VTE-associated deaths. To optimize combat casualty care during prolonged field care, it will be essential to ensure the timely administration of VTE chemoprophylaxis as soon as the risk of significant hemorrhage permits.

The burden of disease, injuries, and risk factors in Mexico: 1990-2021 update.

BACKGROUND: For thirty years, Mexico has studied the burden of disease in order to inform health decisions. OBJECTIVE: To analyze the burden of disease, injuries, and risk factors in Mexico between 1990 and 2021. MATERIAL AND METHODS: Estimates from the Global Burden of Disease 2021 study were used to analyze mortality, years of life lost due to premature mortality, years lived with disability and disability-adjusted life years, as well as the burden attributable to risk factors by sex, age and state of the country. RESULTS: Infant mortality decreased by 39.4% from 1990 to 2000 and by 49.0% from 2000 to 2013. At the national level, mortality decreased by 27.5% between 1990 and 2019, but increased in 2020 and 2021 across all states, especially in adults aged from 35 to 64 years due to the COVID-19 pandemic, which contributed with 24.3% of deaths in 2021. Significant differences in mortality were observed according to age and sex. The burden attributable to metabolic risk factors did increase, while alcohol and tobacco consumption decreased. Access to drinking water and sanitation showed improvements. CONCLUSIONS: Assessing the burden of disease is crucial in order to design effective strategies to address current health needs and future healthcare challenges.

ANTECEDENTES: Desde hace treinta años, México ha estudiado la carga de la enfermedad para sustentar decisiones en salud. OBJETIVO: Analizar la carga de enfermedad, lesiones y factores de riesgo en México entre 1990 y 2021. MATERIAL Y MÉTODOS: Se utilizaron las estimaciones del Global Burden of Disease 2021 para analizar la mortalidad, los años de vida perdidos por muerte prematura, los años vividos con discapacidad y los años de vida saludable perdidos, así como la carga atribuible a los factores de riesgos por sexo, edad y entidad federativa. RESULTADOS: La mortalidad infantil disminuyó 39.4 % de 1990 a 2000, y 49.0 % de 2000 a 2019. En el ámbito nacional, la mortalidad decreció 27.5 % entre 1990 y 2019, pero ascendió en 2020 y 2021 en todos los estados, especialmente en adultos de 35 a 64 años, debido a la pandemia de COVID-19, que contribuyó con 24.3 % de las defunciones en 2019. Se observaron diferencias significativas en la mortalidad según la edad y el sexo. La carga atribuible a los factores de riesgo metabólicos se incrementó, mientras que la atribuible el consumo de alcohol y tabaco disminuyó. El acceso al agua potable y saneamiento mejoró. CONCLUSIONES: Evaluar la carga de enfermedad es crucial para diseñar estrategias eficaces para abordar las necesidades actuales y los futuros desafíos en salud.

COVID-19 impact on life expectancy in Mexico. An analysis based on the Global Burden of Disease 2021 study.

BACKGROUND: Between 2020 and 2021, Mexico documented 2.21 million fatalities, out of which 25.3% were attributable to SARS-COV-2 infection. OBJECTIVES: To evaluate COVID-19 mortality during 2020-2021, determine its impact on national- and state-level life expectancy at birth, and in a group of selected countries of the region, as well as to analyze it according to sociodemographic profiles. MATERIAL AND METHODS: Data from the Global Burden of Disease 2021 study were used to report mortality, the impact on life expectancy and underlying causes between 2019 and 2021. These data were evaluated from the perspective of response to the pandemic and according to the sociodemographic structure based on a quadratic regression model. RESULTS: Between 2020 and 2021, 708,971 excess deaths were recorded, which decreased life expectancy at birth by 4.6 years; 76% of this reduction was attributed to COVID-19. The COVID-19 mortality rate was higher than expected according to the sociodemographic conditions of the states. CONCLUSIONS: In Mexico and the countries of the region, the pandemic was devastating and generated regressions in life expectancy at birth, which varied from two to nine years. It is not clear why the effect was so different between countries and within Mexico.

ANTECEDENTES: Entre 2020 y 2021, México experimentó 2.21 millones de defunciones, de las cuales 25.3 % estuvo relacionado con infección por SARS-COV-2. OBJETIVOS: Evaluar la mortalidad por COVID-19 en 2020-2021, determinar su influencia en la esperanza de vida al nacer a nivel nacional, estatal y en países seleccionados de la región, así como analizarla en función del perfil sociodemográfico. MATERIAL Y MÉTODOS: Se utilizaron datos del Global Burden of Disease 2021 para reportar la mortalidad, el impacto en la esperanza de vida y las causas subyacentes entre 2019 y 2021. Se usó una regresión cuadrática para evaluar la mortalidad en exceso como indicador de la respuesta de los estados a la pandemia, considerando su estructura sociodemográfica. RESULTADOS: Entre 2020 y 2021, se registraron 708 971 muertes en exceso, que disminuyeron la esperanza de vida al nacer en 4.6 años; 76 % de esta reducción se atribuyó a COVID-19. La tasa de mortalidad por COVID-19 fue superior a la esperada conforme a las condiciones sociodemográficas de las entidades. CONCLUSIONES: En México y los países de la región, la pandemia fue devastadora y generó regresiones en la esperanza de vida al nacer, que variaron de dos a nueve años. Se requiere más investigación para entender las variaciones en sus efectos.

Crossroads in Liver Transplantation: Is Artificial Intelligence the Key to Donor-Recipient Matching?

Liver transplantation outcomes have improved in recent years. However, with the emergence of expanded donor criteria, tools to better assist donor-recipient matching have become necessary. Most of the currently proposed scores based on conventional biostatistics are not good classifiers of a problem that is considered "unbalanced." In recent years, the implementation of artificial intelligence in medicine has experienced exponential growth. Deep learning, a branch of artificial intelligence, may be the answer to this classification problem. The ability to handle a large number of variables with speed, objectivity, and multi-objective analysis is one of its advantages. Artificial neural networks and random forests have been the most widely used deep classifiers in this field. This review aims to give a brief overview of D-R matching and its evolution in recent years and how artificial intelligence may be able to provide a solution.

Decoding Gene Expression Signatures Underlying Vegetative to Inflorescence Meristem Transition in the Common Bean.

The tropical common bean (Phaseolus vulgaris L.) is an obligatory short-day plant that requires relaxation of the photoperiod to induce flowering. Similar to other crops, photoperiod-induced floral initiation depends on the differentiation and maintenance of meristems. In this study, the global changes in transcript expression profiles were analyzed in two meristematic tissues corresponding to the vegetative and inflorescence meristems of two genotypes with different sensitivities to photoperiods. A total of 3396 differentially expressed genes (DEGs) were identified, and 1271 and 1533 were found to be up-regulated and down-regulated, respectively, whereas 592 genes showed discordant expression patterns between both genotypes. Arabidopsis homologues of DEGs were identified, and most of them were not previously involved in Arabidopsis floral transition, suggesting an evolutionary divergence of the transcriptional regulatory networks of the flowering process of both species. However, some genes belonging to the photoperiod and flower development pathways with evolutionarily conserved transcriptional profiles have been found. In addition, the flower meristem identity genes APETALA1 and LEAFY, as well as CONSTANS-LIKE 5, were identified as markers to distinguish between the vegetative and reproductive stages. Our data also indicated that the down-regulation of the photoperiodic genes seems to be directly associated with promoting floral transition under inductive short-day lengths. These findings provide valuable insight into the molecular factors that underlie meristematic development and contribute to understanding the photoperiod adaptation in the common bean.

Short- and Long-Term Intestinal Complications After Combined Pancreas-Kidney Transplantation.

BACKGROUND: Simultaneous pancreas-kidney (SPK) transplantation is the treatment of choice in patients with type 1 diabetes and end-stage renal disease, because it improves survival and quality of life. Currently, enteric exocrine drainage is the most commonly used method. Intestinal complications continue to be a major cause of posttransplant morbidity despite improvements in surgical technique. This study analyzed early and late intestinal complications related to SPK transplantation. MATERIALS AND METHODS: We performed a retrospective analysis of 100 adult patients undergoing SPK transplantation between January 2009 and December 2019. We performed systemic venous drainage and exocrine enteric drainage with duodenojejunostomy. Statistical analysis was performed using SPSS v2. This study was performed in accordance with the Declaration of Istanbul and the 1964 Declaration of Helsinki. Informed consent was obtained from all participants involved in the study. RESULTS: Intestinal complications were reported in 18 patients. Ten patients (10%) had the following early intestinal complications including: ileus (n = 4), intestinal obstruction (n = 2), graft volvulus (n = 1), duodenal graft fistula (n = 1), and jejunal fistula after pancreas transplantation (n = 1). Two cases required relaparotomy: graft repositioning with Roux-en-Y conversion (n = 1) and Y-roux conversion (n = 1). Eight patients had repeated episodes of intestinal obstruction (8%), of whom 2 required surgery for resolution with 100% postoperative mortality. CONCLUSIONS: SPK transplantation with enteric drainage via duodenojejunostomy has a low rate of short- and long-term postoperative intestinal complications. Surgery in patients with recurrent intestinal obstruction has a high mortality risk and should be performed in reference transplant centers.

A Tomato EMS-Mutagenized Population Provides New Valuable Resources for Gene Discovery and Breeding of Developmental Traits.

Tomato (Solanum lycopersicum L.) is a major horticultural crop and a model species among eudicots, especially for traits related to reproductive development. Although considerable progress has been made since the tomato genome sequence project was completed, most of the genes identified remain predictions with an unknown or hypothetical function. This lack of functional characterization hampers the use of the huge amount of genomic information available to improve the quality and productivity of this crop. Reverse genetics strategies such as artificial mutagenesis and next-generation sequencing approaches build the perfect tandem for increasing knowledge on functional annotation of tomato genes. This work reports the phenotypic characterization of a tomato mutant collection generated from an EMS chemical mutagenesis program aimed to identify interesting agronomic mutants and novel gene functions. Tomato mutants were grouped into fourteen phenotypic classes, including vegetative and reproductive development traits, and the inheritance pattern of the identified mutations was studied. In addition, causal mutation of a selected mutant line was isolated through a mapping-by-sequencing approach as a proof of concept of this strategy's successful implementation. Results support tomato mutagenesis as an essential tool for functional genomics in this fleshy-fruited model species and a highly valuable resource for future breeding programs of this crop species aimed at the development of more productive and resilient new varieties under challenging climatic and production scenarios.