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1.
Nat Hum Behav ; 8(2): 243-255, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38081999

RESUMEN

The rules and structure of human culture impact health as much as genetics or environment. To study these relationships, we combine ancient DNA (n = 230), skeletal metrics (n = 391), palaeopathology (n = 606) and dietary stable isotopes (n = 873) to analyse stature variation in Early Neolithic Europeans from North Central, South Central, Balkan and Mediterranean regions. In North Central Europe, stable isotopes and linear enamel hypoplasias indicate high environmental stress across sexes, but female stature is low, despite polygenic scores identical to males, and suggests that cultural factors preferentially supported male recovery from stress. In Mediterranean populations, sexual dimorphism is reduced, indicating male vulnerability to stress and no strong cultural preference for males. Our analysis indicates that biological effects of sex-specific inequities can be linked to cultural influences at least as early as 7,000 yr ago, and culture, more than environment or genetics, drove height disparities in Early Neolithic Europe.


Asunto(s)
Genética de Población , Caracteres Sexuales , Femenino , Masculino , Humanos , ADN Mitocondrial , Europa (Continente) , Isótopos
2.
Gastroenterology ; 165(5): 1219-1232, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37507075

RESUMEN

BACKGROUND & AIMS: BiTE (bispecific T-cell engager) immune therapy has demonstrated clinical activity in multiple tumor indications, but its influence in the tumor microenvironment remains unclear. CLDN18.2 is overexpressed in solid tumors including gastric cancer (GC) and pancreatic ductal adenocarcinoma (PDAC), both of which are characterized by the presence of immunosuppressive cells, including regulatory T cells (Tregs) and few effector T cells (Teffs). METHODS: We evaluated the activity of AMG 910, a CLDN18.2-targeted half-life extended (HLE) BiTE molecule, in GC and PDAC preclinical models and cocultured Tregs and Teffs in the presence of CLDN18.2-HLE-BiTE. RESULTS: AMG 910 induced potent, specific cytotoxicity in GC and PDAC cell lines. In GSU and SNU-620 GC xenograft models, AMG 910 engaged human CD3+ T cells with tumor cells, resulting in significant antitumor activity. AMG 910 monotherapy, in combination with a programmed death-1 (PD-1) inhibitor, suppressed tumor growth and enhanced survival in an orthotopic Panc4.14 PDAC model. Moreover, Treg infusion enhanced the antitumor efficacy of AMG 910 in the Panc4.14 model. In syngeneic KPC models of PDAC, treatment with a mouse surrogate CLDN18.2-HLE-BiTE (muCLDN18.2-HLE-BiTE) or the combination with an anti-PD-1 antibody significantly inhibited tumor growth. Tregs isolated from mice bearing KPC tumors that were treated with muCLDN18.2-HLE-BiTE showed decreased T cell suppressive activity and enhanced Teff cytotoxic activity, associated with increased production of type I cytokines and expression of Teff gene signatures. CONCLUSIONS: Our data suggest that BiTE molecule treatment converts Treg function from immunosuppressive to immune enhancing, leading to antitumor activity in immunologically "cold" tumors.


Asunto(s)
Anticuerpos Biespecíficos , Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Humanos , Animales , Ratones , Linfocitos T Reguladores/metabolismo , Anticuerpos Biespecíficos/genética , Anticuerpos Biespecíficos/farmacología , Neoplasias Pancreáticas/tratamiento farmacológico , Moléculas de Adhesión Celular , Carcinoma Ductal Pancreático/tratamiento farmacológico , Inmunidad , Microambiente Tumoral , Claudinas
3.
Anthropol Anz ; 80(4): 481-499, 2023 Sep 28.
Artículo en Inglés | MEDLINE | ID: mdl-36519971

RESUMEN

In the focus the pathological changes (stomatitis, sinusitis maxillaris among others) and indications of deficiency (cribra orbitalia, cribra cranii, cribra humeri, cribra fibularis, e.g.) among the 20 subadult individuals from the settlement burials of Lauchheim "Mittelhofen" were analysed and compared to the grownups (adultus-senilis) of the same population. The pathological indications of deficiency appear in similar frequencies as in the grownup individuals. Therefore, exogenous factors leading to the morphological changes must also be considered and the criterion of age at death is not be significant. Only cribra femoris (synonymously often called Allen's fossa or Fossa alleni) tend to occur more frequently in subadults. 85.7% of subadults exhibit cribra femoris compared to 55% of grownup individuals.


Asunto(s)
Entierro , Humanos
4.
Genome Biol ; 23(1): 250, 2022 12 13.
Artículo en Inglés | MEDLINE | ID: mdl-36510283

RESUMEN

BACKGROUND: The pathogen landscape in the Early European Middle Ages remains largely unexplored. Here, we perform a systematic pathogen screening of the rural community Lauchheim "Mittelhofen," in present-day Germany, dated to the Merovingian period, between fifth and eighth century CE. Skeletal remains of individuals were subjected to an ancient DNA metagenomic analysis. Genomes of the detected pathogens were reconstructed and analyzed phylogenetically. RESULTS: Over 30% of the individuals exhibit molecular signs of infection with hepatitis B virus (HBV), parvovirus B19, variola virus (VARV), and Mycobacterium leprae. Seven double and one triple infection were detected. We reconstructed four HBV genomes and one genome each of B19, VARV, and M. leprae. All HBV genomes are of genotype D4 which is rare in Europe today. The VARV strain exhibits a unique pattern of gene loss indicating that viruses with different gene compositions were circulating in the Early Middle Ages. The M. leprae strain clustered in branch 3 together with the oldest to-date genome from the UK. CONCLUSIONS: The high burden of infectious disease, together with osteological markers of physiological stress, reflect a poor health status of the community. This could have been an indirect result of the climate decline in Europe at the time, caused by the Late Antique Little Ice Age (LALIA). Our findings suggest that LALIA may have created an ecological context in which persistent outbreaks set the stage for major epidemics of severe diseases such as leprosy and smallpox hundreds of years later.


Asunto(s)
Coinfección , Lepra , Persona de Mediana Edad , Humanos , Filogenia , Mycobacterium leprae/genética , Lepra/epidemiología , Lepra/historia , Lepra/microbiología , ADN Antiguo
5.
Proc Natl Acad Sci U S A ; 119(15): e2106743119, 2022 04 12.
Artículo en Inglés | MEDLINE | ID: mdl-35389750

RESUMEN

Human culture, biology, and health were shaped dramatically by the onset of agriculture ∼12,000 y B.P. This shift is hypothesized to have resulted in increased individual fitness and population growth as evidenced by archaeological and population genomic data alongside a decline in physiological health as inferred from skeletal remains. Here, we consider osteological and ancient DNA data from the same prehistoric individuals to study human stature variation as a proxy for health across a transition to agriculture. Specifically, we compared "predicted" genetic contributions to height from paleogenomic data and "achieved" adult osteological height estimated from long bone measurements for 167 individuals across Europe spanning the Upper Paleolithic to Iron Age (∼38,000 to 2,400 B.P.). We found that individuals from the Neolithic were shorter than expected (given their individual polygenic height scores) by an average of −3.82 cm relative to individuals from the Upper Paleolithic and Mesolithic (P = 0.040) and −2.21 cm shorter relative to post-Neolithic individuals (P = 0.068), with osteological vs. expected stature steadily increasing across the Copper (+1.95 cm relative to the Neolithic), Bronze (+2.70 cm), and Iron (+3.27 cm) Ages. These results were attenuated when we additionally accounted for genome-wide genetic ancestry variation: for example, with Neolithic individuals −2.82 cm shorter than expected on average relative to pre-Neolithic individuals (P = 0.120). We also incorporated observations of paleopathological indicators of nonspecific stress that can persist from childhood to adulthood in skeletal remains into our model. Overall, our work highlights the potential of integrating disparate datasets to explore proxies of health in prehistory.


Asunto(s)
Agricultura , Estatura , Agricultores , Salud , Esqueleto , Adulto , Agricultura/historia , Estatura/genética , Niño , ADN Antiguo , Europa (Continente) , Agricultores/historia , Variación Genética , Genómica , Salud/historia , Historia Antigua , Humanos , Paleopatología , Esqueleto/anatomía & histología
6.
Mol Biol Evol ; 38(10): 4059-4076, 2021 09 27.
Artículo en Inglés | MEDLINE | ID: mdl-34002224

RESUMEN

Pathogens and associated outbreaks of infectious disease exert selective pressure on human populations, and any changes in allele frequencies that result may be especially evident for genes involved in immunity. In this regard, the 1346-1353 Yersinia pestis-caused Black Death pandemic, with continued plague outbreaks spanning several hundred years, is one of the most devastating recorded in human history. To investigate the potential impact of Y. pestis on human immunity genes, we extracted DNA from 36 plague victims buried in a mass grave in Ellwangen, Germany in the 16th century. We targeted 488 immune-related genes, including HLA, using a novel in-solution hybridization capture approach. In comparison with 50 modern native inhabitants of Ellwangen, we find differences in allele frequencies for variants of the innate immunity proteins Ficolin-2 and NLRP14 at sites involved in determining specificity. We also observed that HLA-DRB1*13 is more than twice as frequent in the modern population, whereas HLA-B alleles encoding an isoleucine at position 80 (I-80+), HLA C*06:02 and HLA-DPB1 alleles encoding histidine at position 9 are half as frequent in the modern population. Simulations show that natural selection has likely driven these allele frequency changes. Thus, our data suggest that allele frequencies of HLA genes involved in innate and adaptive immunity responsible for extracellular and intracellular responses to pathogenic bacteria, such as Y. pestis, could have been affected by the historical epidemics that occurred in Europe.


Asunto(s)
Peste , Yersinia pestis , ADN , Genómica , Humanos , Pandemias/historia , Peste/genética , Yersinia pestis/genética
7.
Anat Rec (Hoboken) ; 304(12): 2811-2822, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-33773064

RESUMEN

Cranial sutures join the many bones of the skull. They are therefore points of weakness and consequently subjected to the many mechanical stresses affecting the cranium. However, the way in which this impacts their morphological complexity remains unclear. We examine the intrinsic and extrinsic mechanisms of human sagittal sutures by quantifying the morphology from 107 individuals from archaeological populations spanning the Mesolithic to Middle ages, using standardized two-dimensional photographs. Results show that the most important factor determining sutural complexity appears to be the position along the cranial vault from the junction with the coronal suture at its anterior-most point to the junction with the lambdoid suture at its posterior-most point. Conversely, factors such as age and lifeways show few trends in complexity, the most significant of which is a lower complexity in the sutures of Mesolithic individuals who consumed a tougher diet. The simple technique used in this study therefore allowed us to identify that, taken together, structural aspects play a more important role in defining the complexity of the human sagittal suture than extrinsic factors such as the mechanical forces imposed on the cranium by individuals' diet.


Asunto(s)
Suturas Craneales , Arqueología , Suturas Craneales/anatomía & histología , Cabeza , Humanos , Cráneo , Suturas
8.
Mol Cancer Ther ; 20(5): 925-933, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-33632870

RESUMEN

AMG 596 is a bispecific T-cell engager (BiTE) immuno-oncology therapy in clinical development for treatment of glioblastoma multiforme (GBM), the most common primary brain tumor in adults with limited therapeutic options. AMG 596 is composed of two single-chain variable fragments that simultaneously bind to the tumor-specific antigen, EGFR variant III (EGFRvIII), on GBM cells and to CD3 on T cells, thereby activating T cells to proliferate and secrete cytotoxic substances that induce lysis of the bound tumor cell. T-cell-redirected lysis by AMG 596 is very potent; in vitro studies revealed EC50 values in the low picomolar range, and in vivo studies showed that AMG 596 treatment significantly increased the overall survival of mice bearing EGFRvIII-expressing orthotopic tumors. In addition, AMG 596 activity is highly specific; no AMG 596-induced T-cell activity can be observed in assays with EGFRvIII-negative GBM cells, and no signs of toxicity and activity were observed in cynomolgus monkeys, which lack expression of EGFRvIII on normal tissues. With EGFRvIII-expressing GBM cells, we showed shedding of EGFRvIII-containing membrane vesicles, followed by vesicle uptake and EGFRvIII cell surface presentation by EGFRvIII noncoding GBM cells. Cell membrane presentation of EGFRvIII following microvesicle transfer allows engagement by AMG 596, resulting in T-cell activation and T-cell-dependent lysis of GBM cells. Together, these data show a compelling preclinical efficacy and safety profile of AMG 596, supporting its development as a novel immunotherapy for treatment of GBM.


Asunto(s)
Anticuerpos Biespecíficos/uso terapéutico , Neoplasias Encefálicas/tratamiento farmacológico , Glioblastoma/tratamiento farmacológico , Inmunoterapia/métodos , Animales , Anticuerpos Biespecíficos/farmacología , Neoplasias Encefálicas/patología , Línea Celular Tumoral , Receptores ErbB , Glioblastoma/patología , Humanos , Ratones
9.
Clin Cancer Res ; 27(10): 2928-2937, 2021 05 15.
Artículo en Inglés | MEDLINE | ID: mdl-33504551

RESUMEN

PURPOSE: Metastatic castration-resistant prostate cancer (mCRPC) remains a disease with high unmet medical need, as most patients do not achieve durable response with available treatments. Prostate-specific membrane antigen (PSMA) is a compelling target for mCRPC. It is highly expressed by primary and metastatic prostate cancer cells, with increased expression after progression on androgen deprivation therapy. EXPERIMENTAL DESIGN: We developed AMG 160, a half-life extended, bispecific T-cell engager immuno-oncology therapy that binds PSMA on prostate cancer cells and cluster of differentiation 3 on T cells for treatment of mCRPC. AMG 160 was evaluated in vitro and in mCRPC xenograft models. AMG 160 tolerability was assessed in nonhuman primates (NHP). AMG 160 activity as monotherapy and in combination with a PSMA-imaging agent, novel hormonal therapy, and immune checkpoint blockade was evaluated. RESULTS: AMG 160 induces potent, specific killing of PSMA-expressing prostate cancer cell lines in vitro, with half-maximal lysis of 6-42 pmol/L. In vivo, AMG 160 administered weekly at 0.2 mg/kg engages T cells administered systemically and promotes regression of established 22Rv-1 mCRPC xenograft tumors. AMG 160 is compatible with the imaging agent gallium 68-labeled PSMA-11, and shows enhanced cytotoxic activity when combined with enzalutamide or an anti-programmed death-1 antibody. AMG 160 exhibits an extended half-life and has an acceptable safety profile in NHPs. CONCLUSIONS: The preclinical characterization of AMG 160 highlights its potent antitumor activity in vitro and in vivo, and its potential for use with known diagnostic or therapeutic agents in mCRPC. These data support the ongoing clinical evaluation of AMG 160 in patients with mCRPC.See related commentary by Kamat et al., p. 2675.


Asunto(s)
Traslado Adoptivo/métodos , Antígenos de Superficie/inmunología , Glutamato Carboxipeptidasa II/inmunología , Neoplasias de la Próstata Resistentes a la Castración/tratamiento farmacológico , Neoplasias de la Próstata Resistentes a la Castración/metabolismo , Linfocitos T/inmunología , Animales , Complejo CD3/antagonistas & inhibidores , Complejo CD3/inmunología , Complejo CD3/metabolismo , Línea Celular Tumoral , Citocinas/metabolismo , Citotoxicidad Inmunológica , Modelos Animales de Enfermedad , Relación Dosis-Respuesta Inmunológica , Glutamato Carboxipeptidasa II/antagonistas & inhibidores , Humanos , Activación de Linfocitos/inmunología , Masculino , Ratones , Neoplasias de la Próstata Resistentes a la Castración/patología , Linfocitos T/metabolismo , Resultado del Tratamiento , Ensayos Antitumor por Modelo de Xenoinjerto
10.
Am J Phys Anthropol ; 174(2): 268-284, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-33107025

RESUMEN

OBJECTIVES: This study characterizes patterns of cranial trauma prevalence in a large sample of Upper Paleolithic (UP) fossil specimens (40,000-10,000 BP). MATERIALS AND METHODS: Our sample comprised 234 individual crania (specimens), representing 1,285 cranial bones (skeletal elements), from 101 Eurasian UP sites. We used generalized linear mixed models (GLMMs) to assess trauma prevalence in relation to age-at-death, sex, anatomical distribution, and between pre- and post-Last Glacial Maximum (LGM) samples, while accounting for skeletal preservation. RESULTS: Models predicted a mean cranial trauma prevalence of 0.07 (95% CI 0.003-0.19) at the level of skeletal elements, and of 0.26 (95% CI 0.08-0.48) at the level of specimens, each when 76-100% complete. Trauma prevalence increased with skeletal preservation. Across specimen and skeletal element datasets, trauma prevalence tended to be higher for males, and was consistently higher in the old age group. We found no time-specific trauma prevalence patterns for the two sexes or age cohorts when comparing samples from before and after the LGM. Samples showed higher trauma prevalence in the vault than in the face, with vault remains being affected predominantly in males. DISCUSSION: Cranial trauma prevalence in UP humans falls within the variation described for Mesolithic and Neolithic samples. According to our current dataset, UP males and females were exposed to slightly different injury risks and trauma distributions, potentially due to different activities or behaviors, yet both sexes exhibit more trauma among the old. Environmental stressors associated with climatic changes of the LGM are not reflected in cranial trauma prevalence. To analyze trauma in incomplete skeletal remains we propose GLMMs as an informative alternative to crude frequency calculations.


Asunto(s)
Traumatismos Craneocerebrales/epidemiología , Cráneo/lesiones , Adolescente , Adulto , Niño , Traumatismos Craneocerebrales/patología , Europa (Continente) , Femenino , Fósiles , Humanos , Masculino , Modelos Estadísticos , Paleopatología , Prevalencia , Cráneo/patología , Adulto Joven
11.
Blood Adv ; 4(17): 4180-4194, 2020 09 08.
Artículo en Inglés | MEDLINE | ID: mdl-32886754

RESUMEN

Multiple myeloma (MM) is a hematologic malignancy that is characterized by the accumulation of abnormal plasma cells (PCs) in the bone marrow (BM). Patient outcome may be improved with BiTE (bispecific T-cell engager) molecules, which redirect T cells to lyse tumor cells. B-cell maturation antigen (BCMA) supports PC survival and is highly expressed on MM cells. A half-life extended anti-BCMA BiTE molecule (AMG 701) induced selective cytotoxicity against BCMA-expressing MM cells (average half-maximal effective concentration, 18.8 ± 14.8 pM), T-cell activation, and cytokine release in vitro. In a subcutaneous mouse xenograft model, at all doses tested, AMG 701 completely inhibited tumor formation (P < .001), as well as inhibited growth of established tumors (P ≤ .001) and extended survival in an orthotopic MM model (P ≤ .01). To evaluate AMG 701 bioactivity in cynomolgus monkeys, a PC surface phenotype and specific genes were defined to enable a quantitative digital droplet polymerase chain reaction assay (sensitivity, 0.1%). Dose-dependent pharmacokinetic and pharmacodynamic behavior was observed, with depletion of PC-specific genes reaching 93% in blood and 85% in BM. Combination with a programmed cell death protein 1 (PD-1)-blocking antibody significantly increased AMG 701 potency in vitro. A model of AMG 701 binding to BCMA and CD3 indicates that the distance between the T-cell and target cell membranes (ie, the immunological synapse) is similar to that of the major histocompatibility complex class I molecule binding to a T-cell receptor and suggests that the synapse would not be disrupted by the half-life extending Fc domain. These data support the clinical development of AMG 701.


Asunto(s)
Anticuerpos Biespecíficos , Mieloma Múltiple , Animales , Complejo CD3 , Macaca fascicularis , Ratones , Mieloma Múltiple/tratamiento farmacológico , Células Plasmáticas , Ensayos Antitumor por Modelo de Xenoinjerto
13.
Blood Adv ; 4(17): 4195-4207, 2020 09 08.
Artículo en Inglés | MEDLINE | ID: mdl-32898244

RESUMEN

We investigated here the novel immunomodulation and anti-multiple myeloma (MM) function of T cells engaged by the bispecific T-cell engager molecule AMG 701, and further examined the impact of AMG 701 in combination with immunomodulatory drugs (IMiDs; lenalidomide and pomalidomide). AMG 701 potently induced T-cell-dependent cellular cytotoxicity (TDCC) against MM cells expressing B-cell maturation antigen, including autologous cells from patients with relapsed and refractory MM (RRMM) (half maximal effective concentration, <46.6 pM). Besides inducing T-cell proliferation and cytolytic activity, AMG 701 also promoted differentiation of patient T cells to central memory, effector memory, and stem cell-like memory (scm) phenotypes, more so in CD8 vs CD4 T subsets, resulting in increased CD8/CD4 ratios in 7-day ex vivo cocultures. IMiDs and AMG 701 synergistically induced TDCC against MM cell lines and autologous RRMM patient cells, even in the presence of immunosuppressive bone marrow stromal cells or osteoclasts. IMiDs further upregulated AMG 701-induced patient T-cell differentiation toward memory phenotypes, associated with increased CD8/CD4 ratios, increased Tscm, and decreased interleukin 10-positive T and T regulatory cells (CD25highFOXP3high), which may downregulate T effector cells. Importantly, the combination of AMG 701 with lenalidomide induced sustained inhibition of MM cell growth in SCID mice reconstituted with human T cells; tumor regrowth was eventually observed in cohorts treated with either agent alone (P < .001). These results strongly support AMG 701 clinical studies as monotherapy in patients with RRMM (NCT03287908) and the combination with IMiDs to improve patient outcomes in MM.


Asunto(s)
Mieloma Múltiple , Preparaciones Farmacéuticas , Animales , Humanos , Inmunomodulación , Lenalidomida , Ratones , Ratones SCID , Mieloma Múltiple/tratamiento farmacológico , Talidomida/análogos & derivados
14.
PLoS Negl Trop Dis ; 14(8): e0008600, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32853225

RESUMEN

Helminth infections are among the World Health Organization's top neglected diseases with significant impact in many Less Economically Developed Countries. Despite no longer being endemic in Europe, the widespread presence of helminth eggs in archaeological deposits indicates that helminths represented a considerable burden in past European populations. Prevalence of infection is a key epidemiological feature that would influence the elimination of endemic intestinal helminths, for example, low prevalence rates may have made it easier to eliminate these infections in Europe without the use of modern anthelminthic drugs. To determine historical prevalence rates we analysed 589 grave samples from 7 European sites dated between 680 and 1700 CE, identifying two soil transmitted nematodes (Ascaris spp. and Trichuris trichiura) at all locations, and two food derived cestodes (Diphyllobothrium latum and Taenia spp.) at 4 sites. The rates of nematode infection in the medieval populations (1.5 to 25.6% for T. trichiura; 9.3-42.9% for Ascaris spp.) were comparable to those reported within modern endemically infected populations. There was some evidence of higher levels of nematode infection in younger individuals but not at all sites. The genetic diversity of T. trichiura ITS-1 in single graves was variable but much lower than with communal medieval latrine deposits. The prevalence of food derived cestodes was much lower (1.0-9.9%) than the prevalence of nematodes. Interestingly, sites that contained Taenia spp. eggs also contained D. latum which may reflect local culinary practices. These data demonstrate the importance of helminth infections in Medieval Europe and provide a baseline for studies on the epidemiology of infection in historical and modern contexts. Since the prevalence of medieval STH infections mirror those in modern endemic countries the factors affecting STH decline in Europe may also inform modern intervention campaigns.


Asunto(s)
Helmintiasis/epidemiología , Intestinos/parasitología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Animales , Antihelmínticos/uso terapéutico , Ascariasis/epidemiología , Ascariasis/transmisión , Ascaris , Niño , Preescolar , Europa (Continente)/epidemiología , Femenino , Variación Genética , Helmintiasis/tratamiento farmacológico , Helmintiasis/transmisión , Helmintos/genética , Humanos , Lactante , Recién Nacido , Masculino , Persona de Mediana Edad , Enfermedades Desatendidas/epidemiología , Nematodos , Prevalencia , Suelo/parasitología , Cuartos de Baño , Tricuriasis/epidemiología , Tricuriasis/transmisión , Trichuris , Adulto Joven
15.
Mol Cancer Ther ; 19(9): 1875-1888, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32518207

RESUMEN

Despite advances in the treatment of acute myeloid leukemia (AML), novel therapies are needed to induce deeper and more durable clinical response. Bispecific T-cell Engager (BiTE) molecules, which redirect patient T cells to lyse tumor cells, are a clinically validated modality for hematologic malignancies. Due to broad AML expression and limited normal tissue expression, fms-related tyrosine kinase 3 (FLT3) is proposed to be an optimal BiTE molecule target. Expression profiling of FLT3 was performed in primary AML patient samples and normal hematopoietic cells and nonhematopoietic tissues. Two novel FLT3 BiTE molecules, one with a half-life extending (HLE) Fc moiety and one without, were assessed for T-cell-dependent cellular cytotoxicity (TDCC) of FLT3-positive cell lines in vitro, in vivo, and ex vivo FLT3 protein was detected on the surface of most primary AML bulk and leukemic stem cells but only a fraction of normal hematopoietic stem and progenitor cells. FLT3 protein detected in nonhematopoietic cells was cytoplasmic. FLT3 BiTE molecules induced TDCC of FLT3-positive cells in vitro, reduced tumor growth and increased survival in AML mouse models in vivo Both molecules exhibited reproducible pharmacokinetic and pharmacodynamic profiles in cynomolgus monkeys in vivo, including elimination of FLT3-positive cells in blood and bone marrow. In ex vivo cultures of primary AML samples, patient T cells induced TDCC of FLT3-positive target cells. Combination with PD-1 blockade increased BiTE activity. These data support the clinical development of an FLT3 targeting BiTE molecule for the treatment of AML.


Asunto(s)
Anticuerpos Biespecíficos/administración & dosificación , Inhibidores de Puntos de Control Inmunológico/administración & dosificación , Leucemia Mieloide Aguda/tratamiento farmacológico , Tirosina Quinasa 3 Similar a fms/metabolismo , Animales , Anticuerpos Biespecíficos/farmacología , Ciclo Celular , Línea Celular Tumoral , Proliferación Celular , Supervivencia Celular , Citotoxicidad Inmunológica , Sinergismo Farmacológico , Humanos , Inhibidores de Puntos de Control Inmunológico/farmacología , Células K562 , Leucemia Mieloide Aguda/metabolismo , Macaca fascicularis , Ratones , Resultado del Tratamiento , Tirosina Quinasa 3 Similar a fms/antagonistas & inhibidores
16.
Sci Adv ; 6(22): eaaz5344, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-32523989

RESUMEN

Starting from 12,000 years ago in the Middle East, the Neolithic lifestyle spread across Europe via separate continental and Mediterranean routes. Genomes from early European farmers have shown a clear Near Eastern/Anatolian genetic affinity with limited contribution from hunter-gatherers. However, no genomic data are available from modern-day France, where both routes converged, as evidenced by a mosaic cultural pattern. Here, we present genome-wide data from 101 individuals from 12 sites covering today's France and Germany from the Mesolithic (N = 3) to the Neolithic (N = 98) (7000-3000 BCE). Using the genetic substructure observed in European hunter-gatherers, we characterize diverse patterns of admixture in different regions, consistent with both routes of expansion. Early western European farmers show a higher proportion of distinctly western hunter-gatherer ancestry compared to central/southeastern farmers. Our data highlight the complexity of the biological interactions during the Neolithic expansion by revealing major regional variations.

17.
Nat Commun ; 11(1): 1915, 2020 04 20.
Artículo en Inglés | MEDLINE | ID: mdl-32313080

RESUMEN

Genetic studies of Neolithic and Bronze Age skeletons from Europe have provided evidence for strong population genetic changes at the beginning and the end of the Neolithic period. To further understand the implications of these in Southern Central Europe, we analyze 96 ancient genomes from Switzerland, Southern Germany, and the Alsace region in France, covering the Middle/Late Neolithic to Early Bronze Age. Similar to previously described genetic changes in other parts of Europe from the early 3rd millennium BCE, we detect an arrival of ancestry related to Late Neolithic pastoralists from the Pontic-Caspian steppe in Switzerland as early as 2860-2460 calBCE. Our analyses suggest that this genetic turnover was a complex process lasting almost 1000 years and involved highly genetically structured populations in this region.


Asunto(s)
ADN Antiguo , Evolución Molecular , Genética de Población/historia , Genoma Humano/genética , Arqueología , ADN Mitocondrial/genética , Europa (Continente) , Francia , Alemania , Historia Antigua , Humanos , Suiza , Población Blanca/genética
18.
Science ; 366(6466): 731-734, 2019 11 08.
Artículo en Inglés | MEDLINE | ID: mdl-31601705

RESUMEN

Revealing and understanding the mechanisms behind social inequality in prehistoric societies is a major challenge. By combining genome-wide data, isotopic evidence, and anthropological and archaeological data, we have gone beyond the dominating supraregional approaches in archaeogenetics to shed light on the complexity of social status, inheritance rules, and mobility during the Bronze Age. We applied a deep microregional approach and analyzed genome-wide data of 104 human individuals deriving from farmstead-related cemeteries from the Late Neolithic to the Middle Bronze Age in southern Germany. Our results reveal individual households, lasting several generations, that consisted of a high-status core family and unrelated low-status individuals; a social organization accompanied by patrilocality and female exogamy; and the stability of this system over 700 years.


Asunto(s)
Composición Familiar/historia , Clase Social/historia , Antropología , ADN Antiguo , Femenino , Alemania , Historia Antigua , Humanos , Masculino , Linaje , Polimorfismo de Nucleótido Simple
19.
Methods Mol Biol ; 1985: 365-371, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31069745

RESUMEN

For enantioseparations of chiral drugs in capillary electrophoresis, chiral ionic liquids (CIL) can be employed instead of traditional running buffer containing a chiral selector. CILs can be applied solely or in addition to the often used cyclodextrin derivatives. Here the separation of phenethylamines, especially of ephedrine, is described using tetrabutylammonium L-argininate (125 mM) in phosphate buffer (75 mM, pH 1.5) in addition to ß-cyclodextrin (30 mM). Using this dual-chiral running buffer system ephedrine, pseudoephedrine and methylephedrine, but not norephedrine, could be easily resolved.


Asunto(s)
Aminoácidos/química , Ciclodextrinas/química , Electroforesis Capilar/métodos , Líquidos Iónicos/química , Tampones (Química) , Efedrina/química , Efedrina/aislamiento & purificación , Compuestos de Amonio Cuaternario , Estereoisomerismo
20.
Nature ; 563(7733): 686-690, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-30429606

RESUMEN

Neanderthals are commonly depicted as leading dangerous lives and permanently struggling for survival. This view largely relies on the high incidences of trauma that have been reported1,2 and have variously been attributed to violent social behaviour3,4, highly mobile hunter-gatherer lifestyles2 or attacks by carnivores5. The described Neanderthal pattern of predominantly cranial injuries is further thought to reflect violent encounters with large prey mammals, resulting from the use of close-range hunting weapons1. These interpretations directly shape our understanding of Neanderthal lifestyles, health and hunting abilities, yet mainly rest on descriptive, case-based evidence. Quantitative, population-level studies of traumatic injuries are rare. Here we reassess the hypothesis of higher cranial trauma prevalence among Neanderthals using a population-level approach-accounting for preservation bias and other contextual data-and an exhaustive fossil database. We show that Neanderthals and early Upper Palaeolithic anatomically modern humans exhibit similar overall incidences of cranial trauma, which are higher for males in both taxa, consistent with patterns shown by later populations of modern humans. Beyond these similarities, we observed species-specific, age-related variation in trauma prevalence, suggesting that there were differences in the timing of injuries during life or that there was a differential mortality risk of trauma survivors in the two groups. Finally, our results highlight the importance of preservation bias in studies of trauma prevalence.


Asunto(s)
Lesiones Traumáticas del Encéfalo/historia , Fósiles , Hombre de Neandertal , Cráneo/patología , Adulto , Determinación de la Edad por el Esqueleto , Animales , Lesiones Traumáticas del Encéfalo/epidemiología , Lesiones Traumáticas del Encéfalo/patología , Niño , Femenino , Historia Antigua , Humanos , Incidencia , Estilo de Vida/historia , Masculino , Prevalencia , Determinación del Sexo por el Esqueleto , Incertidumbre , Violencia/historia , Adulto Joven
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